Release 0.2.0

Closes gh-409

.github/ISSUE_TEMPLATE/config.yml

@@ -3,6 +3,3 @@ contact_links:
   - name: Community Support
     url: https://stackoverflow.com/questions/tagged/spring-security
     about: Please ask and answer questions on StackOverflow with the tag `spring-security`.
-  - name: Security Issues
-    url: https://pivotal.io/security#reporting
-    about: Please report security vulnerabilities here.

.github/workflows/continuous-integration-workflow.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   schedule:
     - cron: '0 10 * * *' # Once per day at 10am UTC
 

.github/workflows/pr-build-workflow.yml

@@ -3,7 +3,7 @@ name: PR build
 on:
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   build:

CONTRIBUTING.adoc

@@ -1,7 +1,7 @@
 = Contributing to Spring Authorization Server
 
 Spring Authorization Server is released under the Apache 2.0 license.
-If you would like to contribute something, or simply want to hack on the code this document should help you https://github.com/spring-projects-experimental/spring-authorization-server#getting-started[get started].
+If you would like to contribute something, or simply want to hack on the code this document should help you https://github.com/spring-projects/spring-authorization-server#getting-started[get started].
 
 == Code of Conduct
 This project adheres to the Contributor Covenant link:CODE_OF_CONDUCT.adoc[code of conduct].
@@ -32,7 +32,7 @@ That may mean using an external library directly in a `Filter`.
 
 == Reporting Security Vulnerabilities
 If you think you have found a security vulnerability please *DO NOT* disclose it publicly until we've had a chance to fix it.
-Please don't report security vulnerabilities using GitHub issues, instead head over to https://pivotal.io/security and learn how to disclose them responsibly.
+Please don't report security vulnerabilities using GitHub issues, instead head over to https://spring.io/security-policy and learn how to disclose them responsibly.
 
 == Sign the Contributor License Agreement
 Before we accept a non-trivial patch or pull request we will need you to https://cla.pivotal.io/sign/spring[sign the Contributor License Agreement].
@@ -45,7 +45,7 @@ Please add the Apache License header to all new classes, for example:
 
 ```java
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

Jenkinsfile

@@ -15,7 +15,7 @@ def GRADLE_ENTERPRISE_SECRET_ACCESS_KEY = string(credentialsId: 'gradle_enterpri
 		variable: 'GRADLE_ENTERPRISE_ACCESS_KEY')
 def SPRING_SIGNING_SECRING = file(credentialsId: 'spring-signing-secring.gpg', variable: 'SIGNING_KEYRING_FILE')
 def SPRING_GPG_PASSPHRASE = string(credentialsId: 'spring-gpg-passphrase', variable: 'SIGNING_PASSWORD')
-def OSSRH_CREDENTIALS = usernamePassword(credentialsId: 'oss-token', passwordVariable: 'OSSRH_PASSWORD', usernameVariable: 'OSSRH_USERNAME')
+def OSSRH_S01_CREDENTIALS = usernamePassword(credentialsId: 'oss-s01-token', passwordVariable: 'OSSRH_S01_TOKEN_PASSWORD', usernameVariable: 'OSSRH_S01_TOKEN_USERNAME')
 def ARTIFACTORY_CREDENTIALS = usernamePassword(credentialsId: '02bd1690-b54f-4c9f-819d-a77cb7a9822c', usernameVariable: 'ARTIFACTORY_USERNAME', passwordVariable: 'ARTIFACTORY_PASSWORD')
 def JENKINS_PRIVATE_SSH_KEY = file(credentialsId: 'docs.spring.io-jenkins_private_ssh_key', variable: 'DEPLOY_SSH_KEY')
 def SONAR_LOGIN_CREDENTIALS = string(credentialsId: 'spring-sonar.login', variable: 'SONAR_LOGIN')
@@ -32,13 +32,14 @@ try {
 				checkout scm
 				sh "git clean -dfx"
 				try {
-					withCredentials([GRADLE_ENTERPRISE_CACHE_USER,
+					withCredentials([ARTIFACTORY_CREDENTIALS,
+						 GRADLE_ENTERPRISE_CACHE_USER,
 						 GRADLE_ENTERPRISE_SECRET_ACCESS_KEY]) {
 						withEnv([jdkEnv(),
 							 "GRADLE_ENTERPRISE_CACHE_USERNAME=${GRADLE_ENTERPRISE_CACHE_USERNAME}",
 							 "GRADLE_ENTERPRISE_CACHE_PASSWORD=${GRADLE_ENTERPRISE_CACHE_PASSWORD}",
 							 "GRADLE_ENTERPRISE_ACCESS_KEY=${GRADLE_ENTERPRISE_ACCESS_KEY}"]) {
-							sh "./gradlew check --stacktrace"
+							sh "./gradlew check -PartifactoryUsername=$ARTIFACTORY_USERNAME -PartifactoryPassword=$ARTIFACTORY_PASSWORD --stacktrace"
 						}
 					}
 				} catch(Exception e) {
@@ -59,7 +60,7 @@ try {
 					sh "git clean -dfx"
 					withCredentials([SPRING_SIGNING_SECRING,
 						 SPRING_GPG_PASSPHRASE,
-						 OSSRH_CREDENTIALS,
+						 OSSRH_S01_CREDENTIALS,
 						 ARTIFACTORY_CREDENTIALS,
 						 GRADLE_ENTERPRISE_CACHE_USER,
 						 GRADLE_ENTERPRISE_SECRET_ACCESS_KEY]) {
@@ -67,7 +68,7 @@ try {
 							 "GRADLE_ENTERPRISE_CACHE_USERNAME=${GRADLE_ENTERPRISE_CACHE_USERNAME}",
 							 "GRADLE_ENTERPRISE_CACHE_PASSWORD=${GRADLE_ENTERPRISE_CACHE_PASSWORD}",
 							 "GRADLE_ENTERPRISE_ACCESS_KEY=${GRADLE_ENTERPRISE_ACCESS_KEY}"]) {
-							sh "./gradlew deployArtifacts finalizeDeployArtifacts -Psigning.secretKeyRingFile=$SIGNING_KEYRING_FILE -Psigning.keyId=$SPRING_SIGNING_KEYID -Psigning.password='$SIGNING_PASSWORD' -PossrhUsername=$OSSRH_USERNAME -PossrhPassword=$OSSRH_PASSWORD -PartifactoryUsername=$ARTIFACTORY_USERNAME -PartifactoryPassword=$ARTIFACTORY_PASSWORD --stacktrace"
+							sh "./gradlew deployArtifacts finalizeDeployArtifacts -Psigning.secretKeyRingFile=$SIGNING_KEYRING_FILE -Psigning.keyId=$SPRING_SIGNING_KEYID -Psigning.password='$SIGNING_PASSWORD' -PossrhTokenUsername=$OSSRH_S01_TOKEN_USERNAME -PossrhTokenPassword=$OSSRH_S01_TOKEN_PASSWORD -PartifactoryUsername=$ARTIFACTORY_USERNAME -PartifactoryPassword=$ARTIFACTORY_PASSWORD --stacktrace"
 						}
 					}
 				}

README.adoc

@@ -1,32 +1,33 @@
 image::https://badges.gitter.im/Join%20Chat.svg[Gitter,link=https://gitter.im/spring-projects/spring-security?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge]
 
-image:https://github.com/spring-projects-experimental/spring-authorization-server/workflows/CI/badge.svg?branch=master["Build Status", link="https://github.com/spring-projects-experimental/spring-authorization-server/actions?query=workflow%3ACI"]
+image:https://github.com/spring-projects/spring-authorization-server/workflows/CI/badge.svg?branch=main["Build Status", link="https://github.com/spring-projects/spring-authorization-server/actions?query=workflow%3ACI"]
 
 = Spring Authorization Server
 
-Spring Authorization Server is a community-driven project led by the https://spring.io/projects/spring-security/[Spring Security] team and is focused on delivering https://tools.ietf.org/html/rfc6749#section-1.1[OAuth 2.0 Authorization Server] support to the Spring community.
+The Spring Authorization Server project, led by the https://spring.io/projects/spring-security/[Spring Security] team, is focused on delivering https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-01#section-1.1[OAuth 2.1 Authorization Server] support to the Spring community.
 
-The project will start in Spring's experimental projects as an independent project so that it can evolve more rapidly.
-
-The ultimate goal of this project is to replace the Authorization Server support provided by https://spring.io/projects/spring-security-oauth/[Spring Security OAuth].
-
-With the much needed help from our community, this project will grow in the same way that the original Spring Security OAuth project did.
+This project replaces the Authorization Server support provided by https://spring.io/projects/spring-security-oauth/[Spring Security OAuth].
 
 == Feature Planning
 This project uses https://www.zenhub.com/[ZenHub] to prioritize the feature roadmap and help organize the project plan.
 The project board can be accessed https://app.zenhub.com/workspaces/authorization-server-5e8f3182b5e8f5841bfc4902/board?repos=248032165[here].
 It is recommended to install the ZenHub https://www.zenhub.com/extension[browser extension] as it integrates natively within GitHub's user interface.
 
+The completed and upcoming feature list can be viewed in the https://github.com/spring-projects/spring-authorization-server/wiki/Feature-List[wiki].
+
+== Support Policy
+The Spring Authorization Server project provides software support and is documented in its link:SUPPORT_POLICY.adoc[support policy].
+
 == Getting Started
-The first place to start is to read the https://tools.ietf.org/html/rfc6749[OAuth 2.0 Authorization Framework] to gain an in-depth understanding on how to build an Authorization Server.
-It is a critically important first step as the implementation must conform to the specification defined in the OAuth 2.0 Authorization Framework and the https://github.com/spring-projects-experimental/spring-authorization-server/wiki/OAuth-2.0-Specifications[related specifications].
+The first place to start is to read the https://datatracker.ietf.org/doc/html/draft-ietf-oauth-v2-1-01[OAuth 2.1 Authorization Framework] to gain an in-depth understanding on how to build an Authorization Server.
+It is a critically important first step as the implementation must conform to the specification defined in the OAuth 2.1 Authorization Framework and the https://github.com/spring-projects/spring-authorization-server/wiki/OAuth-2.0-Specifications[related specifications].
 
 The second place to start is to become very familiar with the codebase in the following Spring Security modules:
 
-- https://github.com/spring-projects/spring-security/tree/master/oauth2/oauth2-core[OAuth 2.0 Core]
-- https://github.com/spring-projects/spring-security/tree/master/oauth2/oauth2-client[OAuth 2.0 Client]
-- https://github.com/spring-projects/spring-security/tree/master/oauth2/oauth2-resource-server[OAuth 2.0 Resource Server]
-- https://github.com/spring-projects/spring-security/tree/master/oauth2/oauth2-jose[OAuth 2.0 JOSE] (Javascript Object Signing and Encryption)
+- https://github.com/spring-projects/spring-security/tree/main/oauth2/oauth2-core[OAuth 2.0 Core]
+- https://github.com/spring-projects/spring-security/tree/main/oauth2/oauth2-client[OAuth 2.0 Client]
+- https://github.com/spring-projects/spring-security/tree/main/oauth2/oauth2-resource-server[OAuth 2.0 Resource Server]
+- https://github.com/spring-projects/spring-security/tree/main/oauth2/oauth2-jose[OAuth 2.0 JOSE] (Javascript Object Signing and Encryption)
 
 A significant amount of effort was put into developing the https://spring.io/blog/2018/01/30/next-generation-oauth-2-0-support-with-spring-security[Next Generation OAuth 2.0 Support in Spring Security].
 The goal is to leverage all the knowledge learned thus far and apply the same to the development of Spring Authorization Server.
@@ -43,7 +44,7 @@ This project adheres to the Contributor Covenant link:CODE_OF_CONDUCT.adoc[code
 By participating, you are expected to uphold this code. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
 
 == Downloading Artifacts
-See https://github.com/spring-projects/spring-framework/wiki/Downloading-Spring-artifacts[downloading Spring artifacts] for Maven repository information.
+See https://github.com/spring-projects/spring-framework/wiki/Spring-Framework-Artifacts[downloading Spring artifacts] for Maven repository information.
 
 == Building from Source
 Spring Authorization Server uses a https://gradle.org[Gradle]-based build system.
@@ -58,7 +59,7 @@ Be sure that your `JAVA_HOME` environment variable points to the `jdk1.8.0` fold
 === Check out sources
 [indent=0]
 ----
-git clone git@github.com:spring-projects-experimental/spring-authorization-server.git
+git clone git@github.com:spring-projects/spring-authorization-server.git
 
 ----
 

SUPPORT_POLICY.adoc

@@ -0,0 +1,21 @@
+= Spring Authorization Server Support Policy
+
+The Spring Authorization Server support offering provides the following support terms:
+
+* Releases are currently in the format of 0.x.y, where:
+** “x” contains new features and potentially breaking changes.
+** “y” contains new features and bug fixes and provides backward compatibility.
+* The Spring Authorization Server project will be supported for at least 3 years after the most recent 0.x.0 release is made available for download.
+* Security fixes will be provided for at least one year after the 0.x.0 release is made available for download. Security fixes will not be provided for updating versions to third-party libraries.
+* Feature support and bug fixes, excluding “Security fixes”, will be provided only for the latest 0.x.y release.
+* This support policy starts with version 0.2.0.
+* We will switch to the standard https://tanzu.vmware.com/support/oss[Spring OSS support policy] when the Spring Authorization Server project reaches version 1.0.0.
+
+An example can help us understand all of these points.
+Assume that 0.2.0 is released in August of 2021.
+This means that the Spring Authorization Server project is supported until at least August of 2024.
+If 0.3.0 is then released in May of 2022, the Spring Authorization Server project is supported until at least May of 2025.
+The 0.3.0 release may contain breaking changes from 0.2.0.
+If a bug is found, only 0.3.0 will be patched in a 0.3.1 release.
+If a security vulnerability is found, a 0.2.4 (assume 0.2.3 is latest) and 0.3.1 release will be provided to fix the security vulnerability.
+However, a vulnerability found in September of 2022 would be fixed in the 0.3.1 release but not the 0.2.3 release, because the vulnerability was discovered more than a year after the 0.2.0 release date.

build.gradle

@@ -1,11 +1,19 @@
 buildscript {
 	dependencies {
-		classpath 'io.spring.gradle:spring-build-conventions:0.0.33.RELEASE'
+		classpath 'io.spring.gradle:spring-build-conventions:0.0.38'
 		classpath "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"
-		classpath 'io.spring.nohttp:nohttp-gradle:0.0.5.RELEASE'
+		classpath 'io.spring.nohttp:nohttp-gradle:0.0.8'
 	}
 	repositories {
-		maven { url 'https://repo.spring.io/plugins-snapshot' }
+		maven {
+			url = 'https://repo.spring.io/plugins-snapshot'
+			if (project.hasProperty('artifactoryUsername')) {
+				credentials {
+					username "$artifactoryUsername"
+					password "$artifactoryPassword"
+				}
+			}
+		}
 		maven { url 'https://plugins.gradle.org/m2/' }
 	}
 }
@@ -14,7 +22,7 @@ apply plugin: 'io.spring.nohttp'
 apply plugin: 'locks'
 apply plugin: 'io.spring.convention.root'
 
-group = 'org.springframework.security.experimental'
+group = 'org.springframework.security'
 description = 'Spring Authorization Server'
 
 ext.snapshotBuild = version.contains("SNAPSHOT")

docs/manual/gradle/dependency-locks/annotationProcessor.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/archives.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/asciidoctorExtensions.lockfile

@@ -1,4 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-io.spring.asciidoctor:spring-asciidoctor-extensions-block-switch:0.4.2.RELEASE

docs/manual/gradle/dependency-locks/compile.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/compileClasspath.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/compileOnly.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/default.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/documentationResources.lockfile

@@ -1,4 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-io.spring.docresources:spring-doc-resources:0.2.1.RELEASE

docs/manual/gradle/dependency-locks/runtime.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/runtimeClasspath.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/testAnnotationProcessor.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/testCompile.lockfile

@@ -1,13 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE

docs/manual/gradle/dependency-locks/testCompileClasspath.lockfile

@@ -1,13 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE

docs/manual/gradle/dependency-locks/testCompileOnly.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

docs/manual/gradle/dependency-locks/testRuntime.lockfile

@@ -1,13 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE

docs/manual/gradle/dependency-locks/testRuntimeClasspath.lockfile

@@ -1,13 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE

docs/manual/spring-security-oauth2-authorization-server-docs-manual.gradle

@@ -14,8 +14,8 @@ asciidoctor {
 }
 
 asciidoctorj {
-	def ghTag = snapshotBuild ? 'master' : project.version
-	def ghUrl = "https://github.com/spring-projects-experimental/spring-authorization-server/tree/$ghTag"
+	def ghTag = snapshotBuild ? 'main' : project.version
+	def ghUrl = "https://github.com/spring-projects/spring-authorization-server/tree/$ghTag"
 	attributes 'spring-authorization-server-version' : project.version,
 		'spring-boot-version' : springBootVersion,
 		revnumber : project.version,
@@ -31,3 +31,7 @@ def resolvedVersions(Configuration configuration) {
 			.collectEntries { [(it.name + "-version"): it.moduleVersion.id.version] }
 	}
 }
+
+repositories {
+	maven { url "https://repo.spring.io/release" }
+}

gradle.properties

@@ -1,5 +1,5 @@
-version=0.0.2
-springBootVersion=2.4.0-M3
+version=0.2.0
+springBootVersion=2.5.3
 org.gradle.jvmargs=-Xmx3g -XX:MaxPermSize=2048m -XX:+HeapDumpOnOutOfMemoryError
 org.gradle.parallel=true
 org.gradle.caching=true

gradle/dependency-management.gradle

@@ -1,13 +1,13 @@
 if (!project.hasProperty("springVersion")) {
-	ext.springVersion = "5.2.+"
+	ext.springVersion = "5.3.9"
 }
 
 if (!project.hasProperty("springSecurityVersion")) {
-	ext.springSecurityVersion = "5.4.+"
+	ext.springSecurityVersion = "5.5.2"
 }
 
 if (!project.hasProperty("reactorVersion")) {
-	ext.reactorVersion = "Dysprosium-SR+"
+	ext.reactorVersion = "2020.0.10"
 }
 
 if (!project.hasProperty("locksDisabled")) {
@@ -21,47 +21,18 @@ dependencyManagement {
 		mavenBom "org.springframework:spring-framework-bom:$springVersion"
 		mavenBom "org.springframework.security:spring-security-bom:$springSecurityVersion"
 		mavenBom "io.projectreactor:reactor-bom:$reactorVersion"
-        mavenBom "com.fasterxml.jackson:jackson-bom:2.+"
+        mavenBom "com.fasterxml.jackson:jackson-bom:2.12.4"
 	}
 
 	dependencies {
-		dependency "com.nimbusds:oauth2-oidc-sdk:latest.release"
-		dependency "com.nimbusds:nimbus-jose-jwt:latest.release"
-		dependency "javax.servlet:javax.servlet-api:4.+"
-		dependency 'junit:junit:latest.release'
-		dependency 'org.assertj:assertj-core:latest.release'
-		dependency 'org.mockito:mockito-core:latest.release'
-		dependency "com.squareup.okhttp3:mockwebserver:3.+"
-		dependency "com.squareup.okhttp3:okhttp:3.+"
-		dependency "com.jayway.jsonpath:json-path:2.+"
-	}
-}
-
-/*
-NOTE:
-The latest `reactor-netty` dependency was split into `reactor-netty-core` and `reactor-netty-http`,
-which resulted in the snapshot build to fail. The below configuration fixes it.
-
-Reference:
-- https://github.com/spring-projects/spring-security/issues/8909
-- https://github.com/reactor/reactor-netty/issues/739#issuecomment-667047117
-*/
-if (reactorVersion.startsWith('20')) {
-	if (reactorVersion.endsWith('SNAPSHOT') || reactorVersion.endsWith('+')) {
-		ext.reactorLatestVersion = "latest.integration"
-	} else {
-		ext.reactorLatestVersion = "latest.release"
-	}
-	configurations {
-		all {
-			resolutionStrategy {
-				eachDependency { DependencyResolveDetails details ->
-					if (details.requested.name == 'reactor-netty') {
-						details.useTarget("${details.requested.group}:reactor-netty-http:${reactorLatestVersion}")
-						details.because("reactor-netty is now split into reactor-netty-core and reactor-netty-http")
-					}
-				}
-			}
-		}
+		dependency "com.nimbusds:nimbus-jose-jwt:9.10.1"
+		dependency "javax.servlet:javax.servlet-api:4.0.1"
+		dependency 'junit:junit:4.13.2'
+		dependency 'org.assertj:assertj-core:3.19.0'
+		dependency 'org.mockito:mockito-core:3.9.0'
+		dependency "com.squareup.okhttp3:mockwebserver:3.14.9"
+		dependency "com.squareup.okhttp3:okhttp:3.14.9"
+		dependency "com.jayway.jsonpath:json-path:2.5.0"
+		dependency "org.hsqldb:hsqldb:2.5.2"
 	}
 }

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.9-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

oauth2-authorization-server/gradle/dependency-locks/annotationProcessor.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/archives.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/checkstyle.lockfile

@@ -1,23 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-antlr:antlr:2.7.7
-ch.qos.logback:logback-classic:1.2.3
-ch.qos.logback:logback-core:1.2.3
-com.google.code.findbugs:jsr305:3.0.2
-com.google.errorprone:error_prone_annotations:2.2.0
-com.google.guava:failureaccess:1.0.1
-com.google.guava:guava:27.1-jre
-com.google.guava:listenablefuture:9999.0-empty-to-avoid-conflict-with-guava
-com.google.j2objc:j2objc-annotations:1.1
-com.puppycrawl.tools:checkstyle:8.22
-commons-beanutils:commons-beanutils:1.9.3
-commons-collections:commons-collections:3.2.2
-info.picocli:picocli:3.9.6
-io.spring.javaformat:spring-javaformat-checkstyle:0.0.15
-io.spring.nohttp:nohttp-checkstyle:0.0.3.RELEASE
-io.spring.nohttp:nohttp:0.0.3.RELEASE
-net.sf.saxon:Saxon-HE:9.9.1-3
-org.antlr:antlr4-runtime:4.7.2
-org.checkerframework:checker-qual:2.5.2
-org.codehaus.mojo:animal-sniffer-annotations:1.17

oauth2-authorization-server/gradle/dependency-locks/compile.lockfile

@@ -1,21 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.nimbusds:nimbus-jose-jwt:9.0.1
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/compileClasspath.lockfile

@@ -1,21 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.nimbusds:nimbus-jose-jwt:9.0.1
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/compileOnly.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/default.lockfile

@@ -1,21 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.nimbusds:nimbus-jose-jwt:9.0.1
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/jacocoAgent.lockfile

@@ -1,4 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-org.jacoco:org.jacoco.agent:0.8.5

oauth2-authorization-server/gradle/dependency-locks/jacocoAnt.lockfile

@@ -1,11 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-org.jacoco:org.jacoco.agent:0.8.5
-org.jacoco:org.jacoco.ant:0.8.5
-org.jacoco:org.jacoco.core:0.8.5
-org.jacoco:org.jacoco.report:0.8.5
-org.ow2.asm:asm-analysis:7.2
-org.ow2.asm:asm-commons:7.2
-org.ow2.asm:asm-tree:7.2
-org.ow2.asm:asm:7.2

oauth2-authorization-server/gradle/dependency-locks/merging.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/optional.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/provided.lockfile

@@ -1,4 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-javax.servlet:javax.servlet-api:4.0.1

oauth2-authorization-server/gradle/dependency-locks/runtime.lockfile

@@ -1,21 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.nimbusds:nimbus-jose-jwt:9.0.1
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/runtimeClasspath.lockfile

@@ -1,21 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.nimbusds:nimbus-jose-jwt:9.0.1
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/runtimeMerge.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/signatures.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/testAnnotationProcessor.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/testCompile.lockfile

@@ -1,36 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.jayway.jsonpath:json-path:2.4.0
-com.nimbusds:nimbus-jose-jwt:9.0.1
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-net.minidev:accessors-smart:1.2
-net.minidev:json-smart:2.3
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.ow2.asm:asm:5.0.4
-org.slf4j:slf4j-api:1.7.25
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-test:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE
-org.springframework:spring-webmvc:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/testCompileClasspath.lockfile

@@ -1,36 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.jayway.jsonpath:json-path:2.4.0
-com.nimbusds:nimbus-jose-jwt:9.0.1
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-net.minidev:accessors-smart:1.2
-net.minidev:json-smart:2.3
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.ow2.asm:asm:5.0.4
-org.slf4j:slf4j-api:1.7.25
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-test:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE
-org.springframework:spring-webmvc:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/testCompileOnly.lockfile

@@ -1,3 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.

oauth2-authorization-server/gradle/dependency-locks/testRuntime.lockfile

@@ -1,36 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.jayway.jsonpath:json-path:2.4.0
-com.nimbusds:nimbus-jose-jwt:9.0.1
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-net.minidev:accessors-smart:1.2
-net.minidev:json-smart:2.3
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.ow2.asm:asm:5.0.4
-org.slf4j:slf4j-api:1.7.25
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-test:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE
-org.springframework:spring-webmvc:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/testRuntimeClasspath.lockfile

@@ -1,36 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.jayway.jsonpath:json-path:2.4.0
-com.nimbusds:nimbus-jose-jwt:9.0.1
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-net.minidev:accessors-smart:1.2
-net.minidev:json-smart:2.3
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.ow2.asm:asm:5.0.4
-org.slf4j:slf4j-api:1.7.25
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-test:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE
-org.springframework:spring-webmvc:5.2.9.RELEASE

oauth2-authorization-server/gradle/dependency-locks/tests.lockfile

@@ -1,36 +0,0 @@
-# This is a Gradle generated file for dependency locking.
-# Manual edits can break the build and are not advised.
-# This file is expected to be part of source control.
-com.fasterxml.jackson.core:jackson-annotations:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-core:2.12.0-rc1
-com.fasterxml.jackson.core:jackson-databind:2.12.0-rc1
-com.fasterxml.jackson:jackson-bom:2.12.0-rc1
-com.github.stephenc.jcip:jcip-annotations:1.0-1
-com.jayway.jsonpath:json-path:2.4.0
-com.nimbusds:nimbus-jose-jwt:9.0.1
-junit:junit:4.13.1
-net.bytebuddy:byte-buddy-agent:1.10.15
-net.bytebuddy:byte-buddy:1.10.15
-net.minidev:accessors-smart:1.2
-net.minidev:json-smart:2.3
-org.assertj:assertj-core:3.17.2
-org.hamcrest:hamcrest-core:1.3
-org.mockito:mockito-core:3.5.13
-org.objenesis:objenesis:3.1
-org.ow2.asm:asm:5.0.4
-org.slf4j:slf4j-api:1.7.25
-org.springframework.security:spring-security-config:5.4.1
-org.springframework.security:spring-security-core:5.4.1
-org.springframework.security:spring-security-oauth2-core:5.4.1
-org.springframework.security:spring-security-oauth2-jose:5.4.1
-org.springframework.security:spring-security-test:5.4.1
-org.springframework.security:spring-security-web:5.4.1
-org.springframework:spring-aop:5.2.9.RELEASE
-org.springframework:spring-beans:5.2.9.RELEASE
-org.springframework:spring-context:5.2.9.RELEASE
-org.springframework:spring-core:5.2.9.RELEASE
-org.springframework:spring-expression:5.2.9.RELEASE
-org.springframework:spring-jcl:5.2.9.RELEASE
-org.springframework:spring-test:5.2.9.RELEASE
-org.springframework:spring-web:5.2.9.RELEASE
-org.springframework:spring-webmvc:5.2.9.RELEASE

oauth2-authorization-server/spring-security-oauth2-authorization-server.gradle

@@ -5,10 +5,14 @@ dependencies {
 	compile 'org.springframework.security:spring-security-web'
 	compile 'org.springframework.security:spring-security-oauth2-core'
 	compile 'org.springframework.security:spring-security-oauth2-jose'
+	compile 'org.springframework.security:spring-security-oauth2-resource-server'
 	compile springCoreDependency
 	compile 'com.nimbusds:nimbus-jose-jwt'
 	compile 'com.fasterxml.jackson.core:jackson-databind'
 
+	optional 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310'
+	optional 'org.springframework:spring-jdbc'
+
 	testCompile 'org.springframework.security:spring-security-test'
 	testCompile 'org.springframework:spring-webmvc'
 	testCompile 'junit:junit'
@@ -16,9 +20,11 @@ dependencies {
 	testCompile 'org.mockito:mockito-core'
 	testCompile 'com.jayway.jsonpath:json-path'
 
+	testRuntime 'org.hsqldb:hsqldb'
+
 	provided 'javax.servlet:javax.servlet-api'
 }
 
 jacoco {
-	toolVersion = '0.8.5'
+	toolVersion = '0.8.6'
 }

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configuration/OAuth2AuthorizationServerConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,23 +15,83 @@
  */
 package org.springframework.security.config.annotation.web.configuration;
 
+import java.util.HashSet;
+import java.util.Set;
+
+import com.nimbusds.jose.JWSAlgorithm;
+import com.nimbusds.jose.jwk.source.JWKSource;
+import com.nimbusds.jose.proc.JWSKeySelector;
+import com.nimbusds.jose.proc.JWSVerificationKeySelector;
+import com.nimbusds.jose.proc.SecurityContext;
+import com.nimbusds.jwt.proc.ConfigurableJWTProcessor;
+import com.nimbusds.jwt.proc.DefaultJWTProcessor;
+
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.security.config.annotation.web.WebSecurityConfigurer;
-import org.springframework.security.config.annotation.web.builders.WebSecurity;
+import org.springframework.core.Ordered;
+import org.springframework.core.annotation.Order;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization.OAuth2AuthorizationServerConfigurer;
+import org.springframework.security.oauth2.jwt.JwtDecoder;
+import org.springframework.security.oauth2.jwt.NimbusJwtDecoder;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.web.SecurityFilterChain;
+import org.springframework.security.web.util.matcher.RequestMatcher;
 
 /**
  * {@link Configuration} for OAuth 2.0 Authorization Server support.
  *
  * @author Joe Grandja
  * @since 0.0.1
+ * @see OAuth2AuthorizationServerConfigurer
  */
 @Configuration(proxyBeanMethods = false)
 public class OAuth2AuthorizationServerConfiguration {
 
 	@Bean
-	public WebSecurityConfigurer<WebSecurity> defaultOAuth2AuthorizationServerSecurity() {
-		return new OAuth2AuthorizationServerSecurity();
+	@Order(Ordered.HIGHEST_PRECEDENCE)
+	public SecurityFilterChain authorizationServerSecurityFilterChain(HttpSecurity http) throws Exception {
+		applyDefaultSecurity(http);
+		return http.build();
+	}
+
+	// @formatter:off
+	public static void applyDefaultSecurity(HttpSecurity http) throws Exception {
+		OAuth2AuthorizationServerConfigurer<HttpSecurity> authorizationServerConfigurer =
+				new OAuth2AuthorizationServerConfigurer<>();
+		RequestMatcher endpointsMatcher = authorizationServerConfigurer
+				.getEndpointsMatcher();
+
+		http
+			.requestMatcher(endpointsMatcher)
+			.authorizeRequests(authorizeRequests ->
+				authorizeRequests.anyRequest().authenticated()
+			)
+			.csrf(csrf -> csrf.ignoringRequestMatchers(endpointsMatcher))
+			.apply(authorizationServerConfigurer);
+	}
+	// @formatter:on
+
+	public static JwtDecoder jwtDecoder(JWKSource<SecurityContext> jwkSource) {
+		Set<JWSAlgorithm> jwsAlgs = new HashSet<>();
+		jwsAlgs.addAll(JWSAlgorithm.Family.RSA);
+		jwsAlgs.addAll(JWSAlgorithm.Family.EC);
+		jwsAlgs.addAll(JWSAlgorithm.Family.HMAC_SHA);
+		ConfigurableJWTProcessor<SecurityContext> jwtProcessor = new DefaultJWTProcessor<>();
+		JWSKeySelector<SecurityContext> jwsKeySelector =
+				new JWSVerificationKeySelector<>(jwsAlgs, jwkSource);
+		jwtProcessor.setJWSKeySelector(jwsKeySelector);
+		// Override the default Nimbus claims set verifier as NimbusJwtDecoder handles it instead
+		jwtProcessor.setJWTClaimsSetVerifier((claims, context) -> {
+		});
+		return new NimbusJwtDecoder(jwtProcessor);
+	}
+
+	@Bean
+	RegisterMissingBeanPostProcessor registerMissingBeanPostProcessor() {
+		RegisterMissingBeanPostProcessor postProcessor = new RegisterMissingBeanPostProcessor();
+		postProcessor.addBeanDefinition(ProviderSettings.class, () -> ProviderSettings.builder().build());
+		return postProcessor;
 	}
 
 }

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configuration/OAuth2AuthorizationServerSecurity.java

@@ -1,58 +0,0 @@
-/*
- * Copyright 2020 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.config.annotation.web.configuration;
-
-import org.springframework.core.Ordered;
-import org.springframework.core.annotation.Order;
-import org.springframework.security.config.annotation.web.builders.HttpSecurity;
-import org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization.OAuth2AuthorizationServerConfigurer;
-import org.springframework.security.web.util.matcher.OrRequestMatcher;
-import org.springframework.security.web.util.matcher.RequestMatcher;
-
-import static org.springframework.security.config.Customizer.withDefaults;
-
-/**
- * {@link WebSecurityConfigurerAdapter} providing default security configuration for OAuth 2.0 Authorization Server.
- *
- * @author Joe Grandja
- * @since 0.0.1
- */
-@Order(Ordered.HIGHEST_PRECEDENCE)
-public class OAuth2AuthorizationServerSecurity extends WebSecurityConfigurerAdapter {
-
-	@Override
-	protected void configure(HttpSecurity http) throws Exception {
-		applyDefaultConfiguration(http);
-	}
-
-	// @formatter:off
-	public static void applyDefaultConfiguration(HttpSecurity http) throws Exception {
-		OAuth2AuthorizationServerConfigurer<HttpSecurity> authorizationServerConfigurer =
-				new OAuth2AuthorizationServerConfigurer<>();
-		RequestMatcher[] endpointMatchers = authorizationServerConfigurer
-				.getEndpointMatchers().toArray(new RequestMatcher[0]);
-
-		http
-			.requestMatcher(new OrRequestMatcher(endpointMatchers))
-			.authorizeRequests(authorizeRequests ->
-					authorizeRequests.anyRequest().authenticated()
-			)
-			.formLogin(withDefaults())
-			.csrf(csrf -> csrf.ignoringRequestMatchers(endpointMatchers))
-			.apply(authorizationServerConfigurer);
-	}
-	// @formatter:on
-}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configuration/RegisterMissingBeanPostProcessor.java

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.config.annotation.web.configuration;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Supplier;
+
+import org.springframework.beans.BeansException;
+import org.springframework.beans.factory.BeanFactory;
+import org.springframework.beans.factory.BeanFactoryAware;
+import org.springframework.beans.factory.BeanFactoryUtils;
+import org.springframework.beans.factory.ListableBeanFactory;
+import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
+import org.springframework.beans.factory.support.AbstractBeanDefinition;
+import org.springframework.beans.factory.support.BeanDefinitionRegistry;
+import org.springframework.beans.factory.support.BeanDefinitionRegistryPostProcessor;
+import org.springframework.beans.factory.support.RootBeanDefinition;
+import org.springframework.context.annotation.AnnotationBeanNameGenerator;
+
+/**
+ * Post processor to register one or more bean definitions on container initialization, if not already present.
+ *
+ * @author Steve Riesenberg
+ * @since 0.2.0
+ */
+final class RegisterMissingBeanPostProcessor implements BeanDefinitionRegistryPostProcessor, BeanFactoryAware {
+	private final AnnotationBeanNameGenerator beanNameGenerator = new AnnotationBeanNameGenerator();
+	private final List<AbstractBeanDefinition> beanDefinitions = new ArrayList<>();
+	private BeanFactory beanFactory;
+
+	@Override
+	public void postProcessBeanDefinitionRegistry(BeanDefinitionRegistry registry) throws BeansException {
+		for (AbstractBeanDefinition beanDefinition : this.beanDefinitions) {
+			String[] beanNames = BeanFactoryUtils.beanNamesForTypeIncludingAncestors(
+					(ListableBeanFactory) this.beanFactory, beanDefinition.getBeanClass(), false, false);
+			if (beanNames.length == 0) {
+				String beanName = this.beanNameGenerator.generateBeanName(beanDefinition, registry);
+				registry.registerBeanDefinition(beanName, beanDefinition);
+			}
+		}
+	}
+
+	@Override
+	public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
+	}
+
+	<T> void addBeanDefinition(Class<T> beanClass, Supplier<T> beanSupplier) {
+		this.beanDefinitions.add(new RootBeanDefinition(beanClass, beanSupplier));
+	}
+
+	@Override
+	public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
+		this.beanFactory = beanFactory;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/AbstractOAuth2Configurer.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+/**
+ * Base configurer for an OAuth 2.0 component (e.g. protocol endpoint).
+ *
+ * @author Joe Grandja
+ * @since 0.1.2
+ */
+abstract class AbstractOAuth2Configurer {
+	private final ObjectPostProcessor<Object> objectPostProcessor;
+
+	AbstractOAuth2Configurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		this.objectPostProcessor = objectPostProcessor;
+	}
+
+	abstract <B extends HttpSecurityBuilder<B>> void init(B builder);
+
+	abstract <B extends HttpSecurityBuilder<B>> void configure(B builder);
+
+	abstract RequestMatcher getRequestMatcher();
+
+	protected final <T> T postProcess(T object) {
+		return (T) this.objectPostProcessor.postProcess(object);
+	}
+
+	protected final ObjectPostProcessor<Object> getObjectPostProcessor() {
+		return this.objectPostProcessor;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationEndpointConfigurer.java

@@ -0,0 +1,209 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AuthorizationResponse;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationCodeRequestAuthenticationException;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationCodeRequestAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationCodeRequestAuthenticationToken;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2AuthorizationEndpointFilter;
+import org.springframework.security.web.authentication.AuthenticationConverter;
+import org.springframework.security.web.authentication.AuthenticationFailureHandler;
+import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
+import org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.OrRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+import org.springframework.util.StringUtils;
+
+/**
+ * Configurer for the OAuth 2.0 Authorization Endpoint.
+ *
+ * @author Joe Grandja
+ * @since 0.1.2
+ * @see OAuth2AuthorizationServerConfigurer#authorizationEndpoint
+ * @see OAuth2AuthorizationEndpointFilter
+ */
+public final class OAuth2AuthorizationEndpointConfigurer extends AbstractOAuth2Configurer {
+	private RequestMatcher requestMatcher;
+	private AuthenticationConverter authorizationRequestConverter;
+	private final List<AuthenticationProvider> authenticationProviders = new ArrayList<>();
+	private AuthenticationSuccessHandler authorizationResponseHandler;
+	private AuthenticationFailureHandler errorResponseHandler;
+	private String consentPage;
+
+	/**
+	 * Restrict for internal use only.
+	 */
+	OAuth2AuthorizationEndpointConfigurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		super(objectPostProcessor);
+	}
+
+	/**
+	 * Sets the {@link AuthenticationConverter} used when attempting to extract an Authorization Request (or Consent) from {@link HttpServletRequest}
+	 * to an instance of {@link OAuth2AuthorizationCodeRequestAuthenticationToken} used for authenticating the request.
+	 *
+	 * @param authorizationRequestConverter the {@link AuthenticationConverter} used when attempting to extract an Authorization Request (or Consent) from {@link HttpServletRequest}
+	 * @return the {@link OAuth2AuthorizationEndpointConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationEndpointConfigurer authorizationRequestConverter(AuthenticationConverter authorizationRequestConverter) {
+		this.authorizationRequestConverter = authorizationRequestConverter;
+		return this;
+	}
+
+	/**
+	 * Adds an {@link AuthenticationProvider} used for authenticating an {@link OAuth2AuthorizationCodeRequestAuthenticationToken}.
+	 *
+	 * @param authenticationProvider an {@link AuthenticationProvider} used for authenticating an {@link OAuth2AuthorizationCodeRequestAuthenticationToken}
+	 * @return the {@link OAuth2AuthorizationEndpointConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationEndpointConfigurer authenticationProvider(AuthenticationProvider authenticationProvider) {
+		this.authenticationProviders.add(authenticationProvider);
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationToken}
+	 * and returning the {@link OAuth2AuthorizationResponse Authorization Response}.
+	 *
+	 * @param authorizationResponseHandler the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationToken}
+	 * @return the {@link OAuth2AuthorizationEndpointConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationEndpointConfigurer authorizationResponseHandler(AuthenticationSuccessHandler authorizationResponseHandler) {
+		this.authorizationResponseHandler = authorizationResponseHandler;
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationException}
+	 * and returning the {@link OAuth2Error Error Response}.
+	 *
+	 * @param errorResponseHandler the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthorizationCodeRequestAuthenticationException}
+	 * @return the {@link OAuth2AuthorizationEndpointConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationEndpointConfigurer errorResponseHandler(AuthenticationFailureHandler errorResponseHandler) {
+		this.errorResponseHandler = errorResponseHandler;
+		return this;
+	}
+
+	/**
+	 * Specify the URI to redirect Resource Owners to if consent is required during
+	 * the {@code authorization_code} flow. A default consent page will be generated when
+	 * this attribute is not specified.
+	 *
+	 * If a URI is specified, applications are required to process the specified URI to generate
+	 * a consent page. The query string will contain the following parameters:
+	 *
+	 * <ul>
+	 * <li>{@code client_id} - the client identifier</li>
+	 * <li>{@code scope} - a space-delimited list of scopes present in the authorization request</li>
+	 * <li>{@code state} - a CSRF protection token</li>
+	 * </ul>
+	 *
+	 * In general, the consent page should create a form that submits
+	 * a request with the following requirements:
+	 *
+	 * <ul>
+	 * <li>It must be an HTTP POST</li>
+	 * <li>It must be submitted to {@link ProviderSettings#getAuthorizationEndpoint()} ()}</li>
+	 * <li>It must include the received {@code client_id} as an HTTP parameter</li>
+	 * <li>It must include the received {@code state} as an HTTP parameter</li>
+	 * <li>It must include the list of {@code scope}s the {@code Resource Owner}
+	 * consented to as an HTTP parameter</li>
+	 * </ul>
+	 *
+	 * @param consentPage the URI of the custom consent page to redirect to if consent is required (e.g. "/oauth2/consent")
+	 * @return the {@link OAuth2AuthorizationEndpointConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationEndpointConfigurer consentPage(String consentPage) {
+		this.consentPage = consentPage;
+		return this;
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void init(B builder) {
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		this.requestMatcher = new OrRequestMatcher(
+				new AntPathRequestMatcher(
+						providerSettings.getAuthorizationEndpoint(),
+						HttpMethod.GET.name()),
+				new AntPathRequestMatcher(
+						providerSettings.getAuthorizationEndpoint(),
+						HttpMethod.POST.name()));
+
+		List<AuthenticationProvider> authenticationProviders =
+				!this.authenticationProviders.isEmpty() ?
+						this.authenticationProviders :
+						createDefaultAuthenticationProviders(builder);
+		authenticationProviders.forEach(authenticationProvider ->
+				builder.authenticationProvider(postProcess(authenticationProvider)));
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void configure(B builder) {
+		AuthenticationManager authenticationManager = builder.getSharedObject(AuthenticationManager.class);
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+
+		OAuth2AuthorizationEndpointFilter authorizationEndpointFilter =
+				new OAuth2AuthorizationEndpointFilter(
+						authenticationManager,
+						providerSettings.getAuthorizationEndpoint());
+		if (this.authorizationRequestConverter != null) {
+			authorizationEndpointFilter.setAuthenticationConverter(this.authorizationRequestConverter);
+		}
+		if (this.authorizationResponseHandler != null) {
+			authorizationEndpointFilter.setAuthenticationSuccessHandler(this.authorizationResponseHandler);
+		}
+		if (this.errorResponseHandler != null) {
+			authorizationEndpointFilter.setAuthenticationFailureHandler(this.errorResponseHandler);
+		}
+		if (StringUtils.hasText(this.consentPage)) {
+			authorizationEndpointFilter.setConsentPage(this.consentPage);
+		}
+		builder.addFilterBefore(postProcess(authorizationEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
+	}
+
+	@Override
+	RequestMatcher getRequestMatcher() {
+		return this.requestMatcher;
+	}
+
+	private <B extends HttpSecurityBuilder<B>> List<AuthenticationProvider> createDefaultAuthenticationProviders(B builder) {
+		List<AuthenticationProvider> authenticationProviders = new ArrayList<>();
+
+		OAuth2AuthorizationCodeRequestAuthenticationProvider authorizationCodeRequestAuthenticationProvider =
+				new OAuth2AuthorizationCodeRequestAuthenticationProvider(
+						OAuth2ConfigurerUtils.getRegisteredClientRepository(builder),
+						OAuth2ConfigurerUtils.getAuthorizationService(builder),
+						OAuth2ConfigurerUtils.getAuthorizationConsentService(builder));
+		authenticationProviders.add(authorizationCodeRequestAuthenticationProvider);
+
+		return authenticationProviders;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2AuthorizationServerConfigurer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,27 +15,27 @@
  */
 package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
 
-import org.springframework.beans.factory.BeanFactoryUtils;
-import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
-import org.springframework.context.ApplicationContext;
+import java.net.URI;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
 import org.springframework.http.HttpMethod;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.config.Customizer;
 import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
 import org.springframework.security.config.annotation.web.configurers.AbstractHttpConfigurer;
 import org.springframework.security.config.annotation.web.configurers.ExceptionHandlingConfigurer;
-import org.springframework.security.crypto.keys.KeyManager;
-import org.springframework.security.oauth2.jose.jws.NimbusJwsEncoder;
-import org.springframework.security.oauth2.server.authorization.InMemoryOAuth2AuthorizationService;
+import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationConsentService;
 import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
-import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationCodeAuthenticationProvider;
-import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationProvider;
-import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientCredentialsAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2TokenIntrospectionAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2TokenRevocationAuthenticationProvider;
 import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
-import org.springframework.security.oauth2.server.authorization.web.JwkSetEndpointFilter;
-import org.springframework.security.oauth2.server.authorization.web.OAuth2AuthorizationEndpointFilter;
-import org.springframework.security.oauth2.server.authorization.web.OAuth2ClientAuthenticationFilter;
-import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenEndpointFilter;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.web.NimbusJwkSetEndpointFilter;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2AuthorizationServerMetadataEndpointFilter;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenIntrospectionEndpointFilter;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenRevocationEndpointFilter;
 import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
 import org.springframework.security.web.authentication.HttpStatusEntryPoint;
 import org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter;
@@ -43,38 +43,44 @@ import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
 import org.springframework.security.web.util.matcher.OrRequestMatcher;
 import org.springframework.security.web.util.matcher.RequestMatcher;
 import org.springframework.util.Assert;
-import org.springframework.util.StringUtils;
-
-import java.util.Arrays;
-import java.util.List;
-import java.util.Map;
 
 /**
  * An {@link AbstractHttpConfigurer} for OAuth 2.0 Authorization Server support.
  *
  * @author Joe Grandja
+ * @author Daniel Garnier-Moiroux
+ * @author Gerardo Roza
+ * @author Ovidiu Popa
  * @since 0.0.1
  * @see AbstractHttpConfigurer
+ * @see OAuth2ClientAuthenticationConfigurer
+ * @see OAuth2AuthorizationEndpointConfigurer
+ * @see OAuth2TokenEndpointConfigurer
+ * @see OidcConfigurer
  * @see RegisteredClientRepository
  * @see OAuth2AuthorizationService
- * @see OAuth2AuthorizationEndpointFilter
- * @see OAuth2TokenEndpointFilter
- * @see OAuth2ClientAuthenticationFilter
+ * @see OAuth2AuthorizationConsentService
+ * @see OAuth2TokenIntrospectionEndpointFilter
+ * @see OAuth2TokenRevocationEndpointFilter
+ * @see NimbusJwkSetEndpointFilter
+ * @see OAuth2AuthorizationServerMetadataEndpointFilter
  */
 public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBuilder<B>>
 		extends AbstractHttpConfigurer<OAuth2AuthorizationServerConfigurer<B>, B> {
 
-	private final RequestMatcher authorizationEndpointMatcher = new OrRequestMatcher(
-			new AntPathRequestMatcher(
-					OAuth2AuthorizationEndpointFilter.DEFAULT_AUTHORIZATION_ENDPOINT_URI,
-					HttpMethod.GET.name()),
-			new AntPathRequestMatcher(
-					OAuth2AuthorizationEndpointFilter.DEFAULT_AUTHORIZATION_ENDPOINT_URI,
-					HttpMethod.POST.name()));
-	private final RequestMatcher tokenEndpointMatcher = new AntPathRequestMatcher(
-			OAuth2TokenEndpointFilter.DEFAULT_TOKEN_ENDPOINT_URI, HttpMethod.POST.name());
-	private final RequestMatcher jwkSetEndpointMatcher = new AntPathRequestMatcher(
-			JwkSetEndpointFilter.DEFAULT_JWK_SET_ENDPOINT_URI, HttpMethod.GET.name());
+	private final Map<Class<? extends AbstractOAuth2Configurer>, AbstractOAuth2Configurer> configurers = createConfigurers();
+	private RequestMatcher tokenIntrospectionEndpointMatcher;
+	private RequestMatcher tokenRevocationEndpointMatcher;
+	private RequestMatcher jwkSetEndpointMatcher;
+	private RequestMatcher authorizationServerMetadataEndpointMatcher;
+	private final RequestMatcher endpointsMatcher = (request) ->
+			getRequestMatcher(OAuth2AuthorizationEndpointConfigurer.class).matches(request) ||
+			getRequestMatcher(OAuth2TokenEndpointConfigurer.class).matches(request) ||
+			getRequestMatcher(OidcConfigurer.class).matches(request) ||
+			this.tokenIntrospectionEndpointMatcher.matches(request) ||
+			this.tokenRevocationEndpointMatcher.matches(request) ||
+			this.jwkSetEndpointMatcher.matches(request) ||
+			this.authorizationServerMetadataEndpointMatcher.matches(request);
 
 	/**
 	 * Sets the repository of registered clients.
@@ -84,7 +90,7 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 	 */
 	public OAuth2AuthorizationServerConfigurer<B> registeredClientRepository(RegisteredClientRepository registeredClientRepository) {
 		Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
-		this.getBuilder().setSharedObject(RegisteredClientRepository.class, registeredClientRepository);
+		getBuilder().setSharedObject(RegisteredClientRepository.class, registeredClientRepository);
 		return this;
 	}
 
@@ -96,133 +102,187 @@ public final class OAuth2AuthorizationServerConfigurer<B extends HttpSecurityBui
 	 */
 	public OAuth2AuthorizationServerConfigurer<B> authorizationService(OAuth2AuthorizationService authorizationService) {
 		Assert.notNull(authorizationService, "authorizationService cannot be null");
-		this.getBuilder().setSharedObject(OAuth2AuthorizationService.class, authorizationService);
+		getBuilder().setSharedObject(OAuth2AuthorizationService.class, authorizationService);
 		return this;
 	}
 
 	/**
-	 * Sets the key manager.
+	 * Sets the authorization consent service.
 	 *
-	 * @param keyManager the key manager
+	 * @param authorizationConsentService the authorization consent service
 	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
 	 */
-	public OAuth2AuthorizationServerConfigurer<B> keyManager(KeyManager keyManager) {
-		Assert.notNull(keyManager, "keyManager cannot be null");
-		this.getBuilder().setSharedObject(KeyManager.class, keyManager);
+	public OAuth2AuthorizationServerConfigurer<B> authorizationConsentService(OAuth2AuthorizationConsentService authorizationConsentService) {
+		Assert.notNull(authorizationConsentService, "authorizationConsentService cannot be null");
+		getBuilder().setSharedObject(OAuth2AuthorizationConsentService.class, authorizationConsentService);
 		return this;
 	}
 
 	/**
-	 * Returns a {@code List} of {@link RequestMatcher}'s for the authorization server endpoints.
+	 * Sets the provider settings.
 	 *
-	 * @return a {@code List} of {@link RequestMatcher}'s for the authorization server endpoints
+	 * @param providerSettings the provider settings
+	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
 	 */
-	public List<RequestMatcher> getEndpointMatchers() {
-		return Arrays.asList(this.authorizationEndpointMatcher,
-				this.tokenEndpointMatcher, this.jwkSetEndpointMatcher);
+	public OAuth2AuthorizationServerConfigurer<B> providerSettings(ProviderSettings providerSettings) {
+		Assert.notNull(providerSettings, "providerSettings cannot be null");
+		getBuilder().setSharedObject(ProviderSettings.class, providerSettings);
+		return this;
+	}
+
+	/**
+	 * Configures OAuth 2.0 Client Authentication.
+	 *
+	 * @param clientAuthenticationCustomizer the {@link Customizer} providing access to the {@link OAuth2ClientAuthenticationConfigurer}
+	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationServerConfigurer<B> clientAuthentication(Customizer<OAuth2ClientAuthenticationConfigurer> clientAuthenticationCustomizer) {
+		clientAuthenticationCustomizer.customize(getConfigurer(OAuth2ClientAuthenticationConfigurer.class));
+		return this;
+	}
+
+	/**
+	 * Configures the OAuth 2.0 Authorization Endpoint.
+	 *
+	 * @param authorizationEndpointCustomizer the {@link Customizer} providing access to the {@link OAuth2AuthorizationEndpointConfigurer}
+	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationServerConfigurer<B> authorizationEndpoint(Customizer<OAuth2AuthorizationEndpointConfigurer> authorizationEndpointCustomizer) {
+		authorizationEndpointCustomizer.customize(getConfigurer(OAuth2AuthorizationEndpointConfigurer.class));
+		return this;
+	}
+
+	/**
+	 * Configures the OAuth 2.0 Token Endpoint.
+	 *
+	 * @param tokenEndpointCustomizer the {@link Customizer} providing access to the {@link OAuth2TokenEndpointConfigurer}
+	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationServerConfigurer<B> tokenEndpoint(Customizer<OAuth2TokenEndpointConfigurer> tokenEndpointCustomizer) {
+		tokenEndpointCustomizer.customize(getConfigurer(OAuth2TokenEndpointConfigurer.class));
+		return this;
+	}
+
+	/**
+	 * Configures OpenID Connect 1.0 support.
+	 *
+	 * @param oidcCustomizer the {@link Customizer} providing access to the {@link OidcConfigurer}
+	 * @return the {@link OAuth2AuthorizationServerConfigurer} for further configuration
+	 */
+	public OAuth2AuthorizationServerConfigurer<B> oidc(Customizer<OidcConfigurer> oidcCustomizer) {
+		oidcCustomizer.customize(getConfigurer(OidcConfigurer.class));
+		return this;
+	}
+
+	/**
+	 * Returns a {@link RequestMatcher} for the authorization server endpoints.
+	 *
+	 * @return a {@link RequestMatcher} for the authorization server endpoints
+	 */
+	public RequestMatcher getEndpointsMatcher() {
+		return this.endpointsMatcher;
 	}
 
 	@Override
 	public void init(B builder) {
-		OAuth2ClientAuthenticationProvider clientAuthenticationProvider =
-				new OAuth2ClientAuthenticationProvider(
-						getRegisteredClientRepository(builder),
-						getAuthorizationService(builder));
-		builder.authenticationProvider(postProcess(clientAuthenticationProvider));
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		validateProviderSettings(providerSettings);
+		initEndpointMatchers(providerSettings);
 
-		NimbusJwsEncoder jwtEncoder = new NimbusJwsEncoder(getKeyManager(builder));
+		this.configurers.values().forEach(configurer -> configurer.init(builder));
 
-		OAuth2AuthorizationCodeAuthenticationProvider authorizationCodeAuthenticationProvider =
-				new OAuth2AuthorizationCodeAuthenticationProvider(
-						getRegisteredClientRepository(builder),
-						getAuthorizationService(builder),
-						jwtEncoder);
-		builder.authenticationProvider(postProcess(authorizationCodeAuthenticationProvider));
+		OAuth2TokenIntrospectionAuthenticationProvider tokenIntrospectionAuthenticationProvider =
+				new OAuth2TokenIntrospectionAuthenticationProvider(
+						OAuth2ConfigurerUtils.getRegisteredClientRepository(builder),
+						OAuth2ConfigurerUtils.getAuthorizationService(builder));
+		builder.authenticationProvider(postProcess(tokenIntrospectionAuthenticationProvider));
 
-		OAuth2ClientCredentialsAuthenticationProvider clientCredentialsAuthenticationProvider =
-				new OAuth2ClientCredentialsAuthenticationProvider(
-						getAuthorizationService(builder),
-						jwtEncoder);
-		builder.authenticationProvider(postProcess(clientCredentialsAuthenticationProvider));
+		OAuth2TokenRevocationAuthenticationProvider tokenRevocationAuthenticationProvider =
+				new OAuth2TokenRevocationAuthenticationProvider(
+						OAuth2ConfigurerUtils.getAuthorizationService(builder));
+		builder.authenticationProvider(postProcess(tokenRevocationAuthenticationProvider));
 
 		ExceptionHandlingConfigurer<B> exceptionHandling = builder.getConfigurer(ExceptionHandlingConfigurer.class);
 		if (exceptionHandling != null) {
-			// Register the default AuthenticationEntryPoint for the token endpoint
 			exceptionHandling.defaultAuthenticationEntryPointFor(
-					new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED), this.tokenEndpointMatcher);
+					new HttpStatusEntryPoint(HttpStatus.UNAUTHORIZED),
+					new OrRequestMatcher(
+							getRequestMatcher(OAuth2TokenEndpointConfigurer.class),
+							this.tokenIntrospectionEndpointMatcher,
+							this.tokenRevocationEndpointMatcher)
+			);
 		}
 	}
 
 	@Override
 	public void configure(B builder) {
-		JwkSetEndpointFilter jwkSetEndpointFilter = new JwkSetEndpointFilter(getKeyManager(builder));
-		builder.addFilterBefore(postProcess(jwkSetEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
+		this.configurers.values().forEach(configurer -> configurer.configure(builder));
 
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
 		AuthenticationManager authenticationManager = builder.getSharedObject(AuthenticationManager.class);
 
-		OAuth2ClientAuthenticationFilter clientAuthenticationFilter = new OAuth2ClientAuthenticationFilter(
-				authenticationManager, this.tokenEndpointMatcher);
-		builder.addFilterAfter(postProcess(clientAuthenticationFilter), AbstractPreAuthenticatedProcessingFilter.class);
-
-		OAuth2AuthorizationEndpointFilter authorizationEndpointFilter =
-				new OAuth2AuthorizationEndpointFilter(
-						getRegisteredClientRepository(builder),
-						getAuthorizationService(builder));
-		builder.addFilterBefore(postProcess(authorizationEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
-
-		OAuth2TokenEndpointFilter tokenEndpointFilter =
-				new OAuth2TokenEndpointFilter(
+		OAuth2TokenIntrospectionEndpointFilter tokenIntrospectionEndpointFilter =
+				new OAuth2TokenIntrospectionEndpointFilter(
 						authenticationManager,
-						getAuthorizationService(builder));
-		builder.addFilterAfter(postProcess(tokenEndpointFilter), FilterSecurityInterceptor.class);
-	}
+						providerSettings.getTokenIntrospectionEndpoint());
+		builder.addFilterAfter(postProcess(tokenIntrospectionEndpointFilter), FilterSecurityInterceptor.class);
 
-	private static <B extends HttpSecurityBuilder<B>> RegisteredClientRepository getRegisteredClientRepository(B builder) {
-		RegisteredClientRepository registeredClientRepository = builder.getSharedObject(RegisteredClientRepository.class);
-		if (registeredClientRepository == null) {
-			registeredClientRepository = getRegisteredClientRepositoryBean(builder);
-			builder.setSharedObject(RegisteredClientRepository.class, registeredClientRepository);
+		OAuth2TokenRevocationEndpointFilter tokenRevocationEndpointFilter =
+				new OAuth2TokenRevocationEndpointFilter(
+						authenticationManager,
+						providerSettings.getTokenRevocationEndpoint());
+		builder.addFilterAfter(postProcess(tokenRevocationEndpointFilter), FilterSecurityInterceptor.class);
+
+		NimbusJwkSetEndpointFilter jwkSetEndpointFilter =
+				new NimbusJwkSetEndpointFilter(
+						OAuth2ConfigurerUtils.getJwkSource(builder),
+						providerSettings.getJwkSetEndpoint());
+		builder.addFilterBefore(postProcess(jwkSetEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
+
+		if (providerSettings.getIssuer() != null) {
+			OAuth2AuthorizationServerMetadataEndpointFilter authorizationServerMetadataEndpointFilter =
+					new OAuth2AuthorizationServerMetadataEndpointFilter(providerSettings);
+			builder.addFilterBefore(postProcess(authorizationServerMetadataEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
 		}
-		return registeredClientRepository;
 	}
 
-	private static <B extends HttpSecurityBuilder<B>> RegisteredClientRepository getRegisteredClientRepositoryBean(B builder) {
-		return builder.getSharedObject(ApplicationContext.class).getBean(RegisteredClientRepository.class);
+	private Map<Class<? extends AbstractOAuth2Configurer>, AbstractOAuth2Configurer> createConfigurers() {
+		Map<Class<? extends AbstractOAuth2Configurer>, AbstractOAuth2Configurer> configurers = new LinkedHashMap<>();
+		configurers.put(OAuth2ClientAuthenticationConfigurer.class, new OAuth2ClientAuthenticationConfigurer(this::postProcess));
+		configurers.put(OAuth2AuthorizationEndpointConfigurer.class, new OAuth2AuthorizationEndpointConfigurer(this::postProcess));
+		configurers.put(OAuth2TokenEndpointConfigurer.class, new OAuth2TokenEndpointConfigurer(this::postProcess));
+		configurers.put(OidcConfigurer.class, new OidcConfigurer(this::postProcess));
+		return configurers;
 	}
 
-	private static <B extends HttpSecurityBuilder<B>> OAuth2AuthorizationService getAuthorizationService(B builder) {
-		OAuth2AuthorizationService authorizationService = builder.getSharedObject(OAuth2AuthorizationService.class);
-		if (authorizationService == null) {
-			authorizationService = getAuthorizationServiceBean(builder);
-			if (authorizationService == null) {
-				authorizationService = new InMemoryOAuth2AuthorizationService();
+	@SuppressWarnings("unchecked")
+	private <T> T getConfigurer(Class<T> type) {
+		return (T) this.configurers.get(type);
+	}
+
+	private <T extends AbstractOAuth2Configurer> RequestMatcher getRequestMatcher(Class<T> configurerType) {
+		return getConfigurer(configurerType).getRequestMatcher();
+	}
+
+	private void initEndpointMatchers(ProviderSettings providerSettings) {
+		this.tokenIntrospectionEndpointMatcher = new AntPathRequestMatcher(
+				providerSettings.getTokenIntrospectionEndpoint(), HttpMethod.POST.name());
+		this.tokenRevocationEndpointMatcher = new AntPathRequestMatcher(
+				providerSettings.getTokenRevocationEndpoint(), HttpMethod.POST.name());
+		this.jwkSetEndpointMatcher = new AntPathRequestMatcher(
+				providerSettings.getJwkSetEndpoint(), HttpMethod.GET.name());
+		this.authorizationServerMetadataEndpointMatcher = new AntPathRequestMatcher(
+				"/.well-known/oauth-authorization-server", HttpMethod.GET.name());
+	}
+
+	private static void validateProviderSettings(ProviderSettings providerSettings) {
+		if (providerSettings.getIssuer() != null) {
+			try {
+				new URI(providerSettings.getIssuer()).toURL();
+			} catch (Exception ex) {
+				throw new IllegalArgumentException("issuer must be a valid URL", ex);
 			}
-			builder.setSharedObject(OAuth2AuthorizationService.class, authorizationService);
 		}
-		return authorizationService;
 	}
 
-	private static <B extends HttpSecurityBuilder<B>> OAuth2AuthorizationService getAuthorizationServiceBean(B builder) {
-		Map<String, OAuth2AuthorizationService> authorizationServiceMap = BeanFactoryUtils.beansOfTypeIncludingAncestors(
-				builder.getSharedObject(ApplicationContext.class), OAuth2AuthorizationService.class);
-		if (authorizationServiceMap.size() > 1) {
-			throw new NoUniqueBeanDefinitionException(OAuth2AuthorizationService.class, authorizationServiceMap.size(),
-					"Expected single matching bean of type '" + OAuth2AuthorizationService.class.getName() + "' but found " +
-							authorizationServiceMap.size() + ": " + StringUtils.collectionToCommaDelimitedString(authorizationServiceMap.keySet()));
-		}
-		return (!authorizationServiceMap.isEmpty() ? authorizationServiceMap.values().iterator().next() : null);
-	}
-
-	private static <B extends HttpSecurityBuilder<B>> KeyManager getKeyManager(B builder) {
-		KeyManager keyManager = builder.getSharedObject(KeyManager.class);
-		if (keyManager == null) {
-			keyManager = getKeyManagerBean(builder);
-			builder.setSharedObject(KeyManager.class, keyManager);
-		}
-		return keyManager;
-	}
-
-	private static <B extends HttpSecurityBuilder<B>> KeyManager getKeyManagerBean(B builder) {
-		return builder.getSharedObject(ApplicationContext.class).getBean(KeyManager.class);
-	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ClientAuthenticationConfigurer.java

@@ -0,0 +1,172 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.core.context.SecurityContext;
+import org.springframework.security.crypto.password.PasswordEncoder;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientAuthenticationToken;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2ClientAuthenticationFilter;
+import org.springframework.security.web.authentication.AuthenticationConverter;
+import org.springframework.security.web.authentication.AuthenticationFailureHandler;
+import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
+import org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.OrRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+/**
+ * Configurer for OAuth 2.0 Client Authentication.
+ *
+ * @author Joe Grandja
+ * @since 0.2.0
+ * @see OAuth2AuthorizationServerConfigurer#clientAuthentication
+ * @see OAuth2ClientAuthenticationFilter
+ */
+public final class OAuth2ClientAuthenticationConfigurer extends AbstractOAuth2Configurer {
+	private RequestMatcher requestMatcher;
+	private AuthenticationConverter authenticationConverter;
+	private final List<AuthenticationProvider> authenticationProviders = new ArrayList<>();
+	private AuthenticationSuccessHandler authenticationSuccessHandler;
+	private AuthenticationFailureHandler errorResponseHandler;
+
+	/**
+	 * Restrict for internal use only.
+	 */
+	OAuth2ClientAuthenticationConfigurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		super(objectPostProcessor);
+	}
+
+	/**
+	 * Sets the {@link AuthenticationConverter} used when attempting to extract client credentials from {@link HttpServletRequest}
+	 * to an instance of {@link OAuth2ClientAuthenticationToken} used for authenticating the client.
+	 *
+	 * @param authenticationConverter the {@link AuthenticationConverter} used when attempting to extract client credentials from {@link HttpServletRequest}
+	 * @return the {@link OAuth2ClientAuthenticationConfigurer} for further configuration
+	 */
+	public OAuth2ClientAuthenticationConfigurer authenticationConverter(AuthenticationConverter authenticationConverter) {
+		this.authenticationConverter = authenticationConverter;
+		return this;
+	}
+
+	/**
+	 * Adds an {@link AuthenticationProvider} used for authenticating an {@link OAuth2ClientAuthenticationToken}.
+	 *
+	 * @param authenticationProvider an {@link AuthenticationProvider} used for authenticating an {@link OAuth2ClientAuthenticationToken}
+	 * @return the {@link OAuth2ClientAuthenticationConfigurer} for further configuration
+	 */
+	public OAuth2ClientAuthenticationConfigurer authenticationProvider(AuthenticationProvider authenticationProvider) {
+		this.authenticationProviders.add(authenticationProvider);
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationSuccessHandler} used for handling a successful client authentication
+	 * and associating the {@link OAuth2ClientAuthenticationToken} to the {@link SecurityContext}.
+	 *
+	 * @param authenticationSuccessHandler the {@link AuthenticationSuccessHandler} used for handling a successful client authentication
+	 * @return the {@link OAuth2ClientAuthenticationConfigurer} for further configuration
+	 */
+	public OAuth2ClientAuthenticationConfigurer authenticationSuccessHandler(AuthenticationSuccessHandler authenticationSuccessHandler) {
+		this.authenticationSuccessHandler = authenticationSuccessHandler;
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationFailureHandler} used for handling a failed client authentication
+	 * and returning the {@link OAuth2Error Error Response}.
+	 *
+	 * @param errorResponseHandler the {@link AuthenticationFailureHandler} used for handling a failed client authentication
+	 * @return the {@link OAuth2ClientAuthenticationConfigurer} for further configuration
+	 */
+	public OAuth2ClientAuthenticationConfigurer errorResponseHandler(AuthenticationFailureHandler errorResponseHandler) {
+		this.errorResponseHandler = errorResponseHandler;
+		return this;
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void init(B builder) {
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		this.requestMatcher = new OrRequestMatcher(
+				new AntPathRequestMatcher(
+						providerSettings.getTokenEndpoint(),
+						HttpMethod.POST.name()),
+				new AntPathRequestMatcher(
+						providerSettings.getTokenIntrospectionEndpoint(),
+						HttpMethod.POST.name()),
+				new AntPathRequestMatcher(
+						providerSettings.getTokenRevocationEndpoint(),
+						HttpMethod.POST.name()));
+
+		List<AuthenticationProvider> authenticationProviders =
+				!this.authenticationProviders.isEmpty() ?
+						this.authenticationProviders :
+						createDefaultAuthenticationProviders(builder);
+		authenticationProviders.forEach(authenticationProvider ->
+				builder.authenticationProvider(postProcess(authenticationProvider)));
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void configure(B builder) {
+		AuthenticationManager authenticationManager = builder.getSharedObject(AuthenticationManager.class);
+		OAuth2ClientAuthenticationFilter clientAuthenticationFilter = new OAuth2ClientAuthenticationFilter(
+				authenticationManager, this.requestMatcher);
+		if (this.authenticationConverter != null) {
+			clientAuthenticationFilter.setAuthenticationConverter(this.authenticationConverter);
+		}
+		if (this.authenticationSuccessHandler != null) {
+			clientAuthenticationFilter.setAuthenticationSuccessHandler(this.authenticationSuccessHandler);
+		}
+		if (this.errorResponseHandler != null) {
+			clientAuthenticationFilter.setAuthenticationFailureHandler(this.errorResponseHandler);
+		}
+		builder.addFilterAfter(postProcess(clientAuthenticationFilter), AbstractPreAuthenticatedProcessingFilter.class);
+	}
+
+	@Override
+	RequestMatcher getRequestMatcher() {
+		return this.requestMatcher;
+	}
+
+	private <B extends HttpSecurityBuilder<B>> List<AuthenticationProvider> createDefaultAuthenticationProviders(B builder) {
+		List<AuthenticationProvider> authenticationProviders = new ArrayList<>();
+
+		OAuth2ClientAuthenticationProvider clientAuthenticationProvider =
+				new OAuth2ClientAuthenticationProvider(
+						OAuth2ConfigurerUtils.getRegisteredClientRepository(builder),
+						OAuth2ConfigurerUtils.getAuthorizationService(builder));
+		PasswordEncoder passwordEncoder = OAuth2ConfigurerUtils.getOptionalBean(builder, PasswordEncoder.class);
+		if (passwordEncoder != null) {
+			clientAuthenticationProvider.setPasswordEncoder(passwordEncoder);
+		}
+		authenticationProviders.add(clientAuthenticationProvider);
+
+		return authenticationProviders;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2ConfigurerUtils.java

@@ -0,0 +1,172 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import java.util.Map;
+
+import com.nimbusds.jose.jwk.source.JWKSource;
+import com.nimbusds.jose.proc.SecurityContext;
+
+import org.springframework.beans.factory.BeanFactoryUtils;
+import org.springframework.beans.factory.NoSuchBeanDefinitionException;
+import org.springframework.beans.factory.NoUniqueBeanDefinitionException;
+import org.springframework.context.ApplicationContext;
+import org.springframework.core.ResolvableType;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.oauth2.jwt.JwtEncoder;
+import org.springframework.security.oauth2.jwt.NimbusJwsEncoder;
+import org.springframework.security.oauth2.server.authorization.InMemoryOAuth2AuthorizationConsentService;
+import org.springframework.security.oauth2.server.authorization.InMemoryOAuth2AuthorizationService;
+import org.springframework.security.oauth2.server.authorization.JwtEncodingContext;
+import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationConsentService;
+import org.springframework.security.oauth2.server.authorization.OAuth2AuthorizationService;
+import org.springframework.security.oauth2.server.authorization.OAuth2TokenCustomizer;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.util.StringUtils;
+
+/**
+ * Utility methods for the OAuth 2.0 Configurers.
+ *
+ * @author Joe Grandja
+ * @since 0.1.2
+ */
+final class OAuth2ConfigurerUtils {
+
+	private OAuth2ConfigurerUtils() {
+	}
+
+	static <B extends HttpSecurityBuilder<B>> RegisteredClientRepository getRegisteredClientRepository(B builder) {
+		RegisteredClientRepository registeredClientRepository = builder.getSharedObject(RegisteredClientRepository.class);
+		if (registeredClientRepository == null) {
+			registeredClientRepository = getBean(builder, RegisteredClientRepository.class);
+			builder.setSharedObject(RegisteredClientRepository.class, registeredClientRepository);
+		}
+		return registeredClientRepository;
+	}
+
+	static <B extends HttpSecurityBuilder<B>> OAuth2AuthorizationService getAuthorizationService(B builder) {
+		OAuth2AuthorizationService authorizationService = builder.getSharedObject(OAuth2AuthorizationService.class);
+		if (authorizationService == null) {
+			authorizationService = getOptionalBean(builder, OAuth2AuthorizationService.class);
+			if (authorizationService == null) {
+				authorizationService = new InMemoryOAuth2AuthorizationService();
+			}
+			builder.setSharedObject(OAuth2AuthorizationService.class, authorizationService);
+		}
+		return authorizationService;
+	}
+
+	static <B extends HttpSecurityBuilder<B>> OAuth2AuthorizationConsentService getAuthorizationConsentService(B builder) {
+		OAuth2AuthorizationConsentService authorizationConsentService = builder.getSharedObject(OAuth2AuthorizationConsentService.class);
+		if (authorizationConsentService == null) {
+			authorizationConsentService = getOptionalBean(builder, OAuth2AuthorizationConsentService.class);
+			if (authorizationConsentService == null) {
+				authorizationConsentService = new InMemoryOAuth2AuthorizationConsentService();
+			}
+			builder.setSharedObject(OAuth2AuthorizationConsentService.class, authorizationConsentService);
+		}
+		return authorizationConsentService;
+	}
+
+	static <B extends HttpSecurityBuilder<B>> JwtEncoder getJwtEncoder(B builder) {
+		JwtEncoder jwtEncoder = builder.getSharedObject(JwtEncoder.class);
+		if (jwtEncoder == null) {
+			jwtEncoder = getOptionalBean(builder, JwtEncoder.class);
+			if (jwtEncoder == null) {
+				JWKSource<SecurityContext> jwkSource = getJwkSource(builder);
+				jwtEncoder = new NimbusJwsEncoder(jwkSource);
+			}
+			builder.setSharedObject(JwtEncoder.class, jwtEncoder);
+		}
+		return jwtEncoder;
+	}
+
+	@SuppressWarnings("unchecked")
+	static <B extends HttpSecurityBuilder<B>> JWKSource<SecurityContext> getJwkSource(B builder) {
+		JWKSource<SecurityContext> jwkSource = builder.getSharedObject(JWKSource.class);
+		if (jwkSource == null) {
+			ResolvableType type = ResolvableType.forClassWithGenerics(JWKSource.class, SecurityContext.class);
+			jwkSource = getBean(builder, type);
+			builder.setSharedObject(JWKSource.class, jwkSource);
+		}
+		return jwkSource;
+	}
+
+	@SuppressWarnings("unchecked")
+	static <B extends HttpSecurityBuilder<B>> OAuth2TokenCustomizer<JwtEncodingContext> getJwtCustomizer(B builder) {
+		OAuth2TokenCustomizer<JwtEncodingContext> jwtCustomizer = builder.getSharedObject(OAuth2TokenCustomizer.class);
+		if (jwtCustomizer == null) {
+			ResolvableType type = ResolvableType.forClassWithGenerics(OAuth2TokenCustomizer.class, JwtEncodingContext.class);
+			jwtCustomizer = getOptionalBean(builder, type);
+			if (jwtCustomizer != null) {
+				builder.setSharedObject(OAuth2TokenCustomizer.class, jwtCustomizer);
+			}
+		}
+		return jwtCustomizer;
+	}
+
+	static <B extends HttpSecurityBuilder<B>> ProviderSettings getProviderSettings(B builder) {
+		ProviderSettings providerSettings = builder.getSharedObject(ProviderSettings.class);
+		if (providerSettings == null) {
+			providerSettings = getOptionalBean(builder, ProviderSettings.class);
+			if (providerSettings == null) {
+				providerSettings = ProviderSettings.builder().build();
+			}
+			builder.setSharedObject(ProviderSettings.class, providerSettings);
+		}
+		return providerSettings;
+	}
+
+	static <B extends HttpSecurityBuilder<B>, T> T getBean(B builder, Class<T> type) {
+		return builder.getSharedObject(ApplicationContext.class).getBean(type);
+	}
+
+	@SuppressWarnings("unchecked")
+	static <B extends HttpSecurityBuilder<B>, T> T getBean(B builder, ResolvableType type) {
+		ApplicationContext context = builder.getSharedObject(ApplicationContext.class);
+		String[] names = context.getBeanNamesForType(type);
+		if (names.length == 1) {
+			return (T) context.getBean(names[0]);
+		}
+		if (names.length > 1) {
+			throw new NoUniqueBeanDefinitionException(type, names);
+		}
+		throw new NoSuchBeanDefinitionException(type);
+	}
+
+	static <B extends HttpSecurityBuilder<B>, T> T getOptionalBean(B builder, Class<T> type) {
+		Map<String, T> beansMap = BeanFactoryUtils.beansOfTypeIncludingAncestors(
+				builder.getSharedObject(ApplicationContext.class), type);
+		if (beansMap.size() > 1) {
+			throw new NoUniqueBeanDefinitionException(type, beansMap.size(),
+					"Expected single matching bean of type '" + type.getName() + "' but found " +
+							beansMap.size() + ": " + StringUtils.collectionToCommaDelimitedString(beansMap.keySet()));
+		}
+		return (!beansMap.isEmpty() ? beansMap.values().iterator().next() : null);
+	}
+
+	@SuppressWarnings("unchecked")
+	static <B extends HttpSecurityBuilder<B>, T> T getOptionalBean(B builder, ResolvableType type) {
+		ApplicationContext context = builder.getSharedObject(ApplicationContext.class);
+		String[] names = context.getBeanNamesForType(type);
+		if (names.length > 1) {
+			throw new NoUniqueBeanDefinitionException(type, names);
+		}
+		return names.length == 1 ? (T) context.getBean(names[0]) : null;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OAuth2TokenEndpointConfigurer.java

@@ -0,0 +1,194 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+
+import javax.servlet.http.HttpServletRequest;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.authentication.AuthenticationProvider;
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
+import org.springframework.security.oauth2.core.OAuth2Error;
+import org.springframework.security.oauth2.core.endpoint.OAuth2AccessTokenResponse;
+import org.springframework.security.oauth2.jwt.JwtEncoder;
+import org.springframework.security.oauth2.server.authorization.JwtEncodingContext;
+import org.springframework.security.oauth2.server.authorization.OAuth2TokenCustomizer;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AccessTokenAuthenticationToken;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationCodeAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2AuthorizationGrantAuthenticationToken;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2ClientCredentialsAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.authentication.OAuth2RefreshTokenAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.web.OAuth2TokenEndpointFilter;
+import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
+import org.springframework.security.web.authentication.AuthenticationConverter;
+import org.springframework.security.web.authentication.AuthenticationFailureHandler;
+import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+/**
+ * Configurer for the OAuth 2.0 Token Endpoint.
+ *
+ * @author Joe Grandja
+ * @since 0.1.2
+ * @see OAuth2AuthorizationServerConfigurer#tokenEndpoint
+ * @see OAuth2TokenEndpointFilter
+ */
+public final class OAuth2TokenEndpointConfigurer extends AbstractOAuth2Configurer {
+	private RequestMatcher requestMatcher;
+	private AuthenticationConverter accessTokenRequestConverter;
+	private final List<AuthenticationProvider> authenticationProviders = new LinkedList<>();
+	private AuthenticationSuccessHandler accessTokenResponseHandler;
+	private AuthenticationFailureHandler errorResponseHandler;
+
+	/**
+	 * Restrict for internal use only.
+	 */
+	OAuth2TokenEndpointConfigurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		super(objectPostProcessor);
+	}
+
+	/**
+	 * Sets the {@link AuthenticationConverter} used when attempting to extract an Access Token Request from {@link HttpServletRequest}
+	 * to an instance of {@link OAuth2AuthorizationGrantAuthenticationToken} used for authenticating the authorization grant.
+	 *
+	 * @param accessTokenRequestConverter the {@link AuthenticationConverter} used when attempting to extract an Access Token Request from {@link HttpServletRequest}
+	 * @return the {@link OAuth2TokenEndpointConfigurer} for further configuration
+	 */
+	public OAuth2TokenEndpointConfigurer accessTokenRequestConverter(AuthenticationConverter accessTokenRequestConverter) {
+		this.accessTokenRequestConverter = accessTokenRequestConverter;
+		return this;
+	}
+
+	/**
+	 * Adds an {@link AuthenticationProvider} used for authenticating a type of {@link OAuth2AuthorizationGrantAuthenticationToken}.
+	 *
+	 * @param authenticationProvider an {@link AuthenticationProvider} used for authenticating a type of {@link OAuth2AuthorizationGrantAuthenticationToken}
+	 * @return the {@link OAuth2TokenEndpointConfigurer} for further configuration
+	 */
+	public OAuth2TokenEndpointConfigurer authenticationProvider(AuthenticationProvider authenticationProvider) {
+		this.authenticationProviders.add(authenticationProvider);
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AccessTokenAuthenticationToken}
+	 * and returning the {@link OAuth2AccessTokenResponse Access Token Response}.
+	 *
+	 * @param accessTokenResponseHandler the {@link AuthenticationSuccessHandler} used for handling an {@link OAuth2AccessTokenAuthenticationToken}
+	 * @return the {@link OAuth2TokenEndpointConfigurer} for further configuration
+	 */
+	public OAuth2TokenEndpointConfigurer accessTokenResponseHandler(AuthenticationSuccessHandler accessTokenResponseHandler) {
+		this.accessTokenResponseHandler = accessTokenResponseHandler;
+		return this;
+	}
+
+	/**
+	 * Sets the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthenticationException}
+	 * and returning the {@link OAuth2Error Error Response}.
+	 *
+	 * @param errorResponseHandler the {@link AuthenticationFailureHandler} used for handling an {@link OAuth2AuthenticationException}
+	 * @return the {@link OAuth2TokenEndpointConfigurer} for further configuration
+	 */
+	public OAuth2TokenEndpointConfigurer errorResponseHandler(AuthenticationFailureHandler errorResponseHandler) {
+		this.errorResponseHandler = errorResponseHandler;
+		return this;
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void init(B builder) {
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		this.requestMatcher = new AntPathRequestMatcher(
+				providerSettings.getTokenEndpoint(), HttpMethod.POST.name());
+
+		List<AuthenticationProvider> authenticationProviders =
+				!this.authenticationProviders.isEmpty() ?
+						this.authenticationProviders :
+						createDefaultAuthenticationProviders(builder);
+		authenticationProviders.forEach(authenticationProvider ->
+				builder.authenticationProvider(postProcess(authenticationProvider)));
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void configure(B builder) {
+		AuthenticationManager authenticationManager = builder.getSharedObject(AuthenticationManager.class);
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+
+		OAuth2TokenEndpointFilter tokenEndpointFilter =
+				new OAuth2TokenEndpointFilter(
+						authenticationManager,
+						providerSettings.getTokenEndpoint());
+		if (this.accessTokenRequestConverter != null) {
+			tokenEndpointFilter.setAuthenticationConverter(this.accessTokenRequestConverter);
+		}
+		if (this.accessTokenResponseHandler != null) {
+			tokenEndpointFilter.setAuthenticationSuccessHandler(this.accessTokenResponseHandler);
+		}
+		if (this.errorResponseHandler != null) {
+			tokenEndpointFilter.setAuthenticationFailureHandler(this.errorResponseHandler);
+		}
+		builder.addFilterAfter(postProcess(tokenEndpointFilter), FilterSecurityInterceptor.class);
+	}
+
+	@Override
+	RequestMatcher getRequestMatcher() {
+		return this.requestMatcher;
+	}
+
+	private <B extends HttpSecurityBuilder<B>> List<AuthenticationProvider> createDefaultAuthenticationProviders(B builder) {
+		List<AuthenticationProvider> authenticationProviders = new ArrayList<>();
+
+		JwtEncoder jwtEncoder = OAuth2ConfigurerUtils.getJwtEncoder(builder);
+		OAuth2TokenCustomizer<JwtEncodingContext> jwtCustomizer = OAuth2ConfigurerUtils.getJwtCustomizer(builder);
+
+		OAuth2AuthorizationCodeAuthenticationProvider authorizationCodeAuthenticationProvider =
+				new OAuth2AuthorizationCodeAuthenticationProvider(
+						OAuth2ConfigurerUtils.getAuthorizationService(builder),
+						jwtEncoder);
+		if (jwtCustomizer != null) {
+			authorizationCodeAuthenticationProvider.setJwtCustomizer(jwtCustomizer);
+		}
+		authenticationProviders.add(authorizationCodeAuthenticationProvider);
+
+		OAuth2RefreshTokenAuthenticationProvider refreshTokenAuthenticationProvider =
+				new OAuth2RefreshTokenAuthenticationProvider(
+						OAuth2ConfigurerUtils.getAuthorizationService(builder),
+						jwtEncoder);
+		if (jwtCustomizer != null) {
+			refreshTokenAuthenticationProvider.setJwtCustomizer(jwtCustomizer);
+		}
+		authenticationProviders.add(refreshTokenAuthenticationProvider);
+
+		OAuth2ClientCredentialsAuthenticationProvider clientCredentialsAuthenticationProvider =
+				new OAuth2ClientCredentialsAuthenticationProvider(
+						OAuth2ConfigurerUtils.getAuthorizationService(builder),
+						jwtEncoder);
+		if (jwtCustomizer != null) {
+			clientCredentialsAuthenticationProvider.setJwtCustomizer(jwtCustomizer);
+		}
+		authenticationProviders.add(clientCredentialsAuthenticationProvider);
+
+		return authenticationProviders;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OidcClientRegistrationEndpointConfigurer.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.security.authentication.AuthenticationManager;
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.oidc.authentication.OidcClientRegistrationAuthenticationProvider;
+import org.springframework.security.oauth2.server.authorization.oidc.web.OidcClientRegistrationEndpointFilter;
+import org.springframework.security.web.access.intercept.FilterSecurityInterceptor;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+/**
+ * Configurer for OpenID Connect Dynamic Client Registration 1.0 Endpoint.
+ *
+ * @author Joe Grandja
+ * @since 0.2.0
+ * @see OidcConfigurer#clientRegistrationEndpoint
+ * @see OidcClientRegistrationEndpointFilter
+ */
+public final class OidcClientRegistrationEndpointConfigurer extends AbstractOAuth2Configurer {
+	private RequestMatcher requestMatcher;
+
+	/**
+	 * Restrict for internal use only.
+	 */
+	OidcClientRegistrationEndpointConfigurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		super(objectPostProcessor);
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void init(B builder) {
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		this.requestMatcher = new AntPathRequestMatcher(
+				providerSettings.getOidcClientRegistrationEndpoint(), HttpMethod.POST.name());
+
+		OidcClientRegistrationAuthenticationProvider oidcClientRegistrationAuthenticationProvider =
+				new OidcClientRegistrationAuthenticationProvider(
+						OAuth2ConfigurerUtils.getRegisteredClientRepository(builder),
+						OAuth2ConfigurerUtils.getAuthorizationService(builder));
+		builder.authenticationProvider(postProcess(oidcClientRegistrationAuthenticationProvider));
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void configure(B builder) {
+		AuthenticationManager authenticationManager = builder.getSharedObject(AuthenticationManager.class);
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+
+		OidcClientRegistrationEndpointFilter oidcClientRegistrationEndpointFilter =
+				new OidcClientRegistrationEndpointFilter(
+						authenticationManager,
+						providerSettings.getOidcClientRegistrationEndpoint());
+		builder.addFilterAfter(postProcess(oidcClientRegistrationEndpointFilter), FilterSecurityInterceptor.class);
+	}
+
+	@Override
+	RequestMatcher getRequestMatcher() {
+		return this.requestMatcher;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/config/annotation/web/configurers/oauth2/server/authorization/OidcConfigurer.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.config.annotation.web.configurers.oauth2.server.authorization;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.http.HttpMethod;
+import org.springframework.security.config.Customizer;
+import org.springframework.security.config.annotation.ObjectPostProcessor;
+import org.springframework.security.config.annotation.web.HttpSecurityBuilder;
+import org.springframework.security.oauth2.server.authorization.config.ProviderSettings;
+import org.springframework.security.oauth2.server.authorization.oidc.web.OidcProviderConfigurationEndpointFilter;
+import org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+import org.springframework.security.web.util.matcher.OrRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+
+/**
+ * Configurer for OpenID Connect 1.0 support.
+ *
+ * @author Joe Grandja
+ * @since 0.2.0
+ * @see OAuth2AuthorizationServerConfigurer#oidc
+ * @see OidcClientRegistrationEndpointConfigurer
+ * @see OidcProviderConfigurationEndpointFilter
+ */
+public final class OidcConfigurer extends AbstractOAuth2Configurer {
+	private OidcClientRegistrationEndpointConfigurer clientRegistrationEndpointConfigurer;
+	private RequestMatcher requestMatcher;
+
+	/**
+	 * Restrict for internal use only.
+	 */
+	OidcConfigurer(ObjectPostProcessor<Object> objectPostProcessor) {
+		super(objectPostProcessor);
+	}
+
+	/**
+	 * Configures the OpenID Connect Dynamic Client Registration 1.0 Endpoint.
+	 *
+	 * @param clientRegistrationEndpointCustomizer the {@link Customizer} providing access to the {@link OidcClientRegistrationEndpointConfigurer}
+	 * @return the {@link OidcConfigurer} for further configuration
+	 */
+	public OidcConfigurer clientRegistrationEndpoint(Customizer<OidcClientRegistrationEndpointConfigurer> clientRegistrationEndpointCustomizer) {
+		if (this.clientRegistrationEndpointConfigurer == null) {
+			this.clientRegistrationEndpointConfigurer = new OidcClientRegistrationEndpointConfigurer(getObjectPostProcessor());
+		}
+		clientRegistrationEndpointCustomizer.customize(this.clientRegistrationEndpointConfigurer);
+		return this;
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void init(B builder) {
+		if (this.clientRegistrationEndpointConfigurer != null) {
+			this.clientRegistrationEndpointConfigurer.init(builder);
+		}
+
+		List<RequestMatcher> requestMatchers = new ArrayList<>();
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		if (providerSettings.getIssuer() != null) {
+			requestMatchers.add(new AntPathRequestMatcher(
+					"/.well-known/openid-configuration", HttpMethod.GET.name()));
+		}
+		if (this.clientRegistrationEndpointConfigurer != null) {
+			requestMatchers.add(this.clientRegistrationEndpointConfigurer.getRequestMatcher());
+		}
+		this.requestMatcher = !requestMatchers.isEmpty() ? new OrRequestMatcher(requestMatchers) : request -> false;
+	}
+
+	@Override
+	<B extends HttpSecurityBuilder<B>> void configure(B builder) {
+		if (this.clientRegistrationEndpointConfigurer != null) {
+			this.clientRegistrationEndpointConfigurer.configure(builder);
+		}
+
+		ProviderSettings providerSettings = OAuth2ConfigurerUtils.getProviderSettings(builder);
+		if (providerSettings.getIssuer() != null) {
+			OidcProviderConfigurationEndpointFilter oidcProviderConfigurationEndpointFilter =
+					new OidcProviderConfigurationEndpointFilter(providerSettings);
+			builder.addFilterBefore(postProcess(oidcProviderConfigurationEndpointFilter), AbstractPreAuthenticatedProcessingFilter.class);
+		}
+	}
+
+	@Override
+	RequestMatcher getRequestMatcher() {
+		return this.requestMatcher;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/crypto/keys/KeyManager.java

@@ -1,58 +0,0 @@
-/*
- * Copyright 2020 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.crypto.keys;
-
-import org.springframework.lang.Nullable;
-
-import java.util.Set;
-
-/**
- * Implementations of this interface are responsible for the management of {@link ManagedKey}(s),
- * e.g. {@code javax.crypto.SecretKey}, {@code java.security.PrivateKey}, {@code java.security.PublicKey}, etc.
- *
- * @author Joe Grandja
- * @since 0.0.1
- * @see ManagedKey
- */
-public interface KeyManager {
-
-	/**
-	 * Returns the {@link ManagedKey} identified by the provided {@code keyId},
-	 * or {@code null} if not found.
-	 *
-	 * @param keyId the key ID
-	 * @return the {@link ManagedKey}, or {@code null} if not found
-	 */
-	@Nullable
-	ManagedKey findByKeyId(String keyId);
-
-	/**
-	 * Returns a {@code Set} of {@link ManagedKey}(s) having the provided key {@code algorithm},
-	 * or an empty {@code Set} if not found.
-	 *
-	 * @param algorithm the key algorithm
-	 * @return a {@code Set} of {@link ManagedKey}(s), or an empty {@code Set} if not found
-	 */
-	Set<ManagedKey> findByAlgorithm(String algorithm);
-
-	/**
-	 * Returns a {@code Set} of the {@link ManagedKey}(s).
-	 *
-	 * @return a {@code Set} of the {@link ManagedKey}(s)
-	 */
-	Set<ManagedKey> getKeys();
-
-}

oauth2-authorization-server/src/main/java/org/springframework/security/crypto/keys/ManagedKey.java

@@ -1,246 +0,0 @@
-/*
- * Copyright 2020 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.crypto.keys;
-
-import org.springframework.lang.Nullable;
-import org.springframework.security.oauth2.server.authorization.Version;
-import org.springframework.util.Assert;
-
-import javax.crypto.SecretKey;
-import java.io.Serializable;
-import java.security.Key;
-import java.security.PrivateKey;
-import java.security.PublicKey;
-import java.time.Instant;
-import java.util.Objects;
-
-/**
- * A {@code java.security.Key} that is managed by a {@link KeyManager}.
- *
- * @author Joe Grandja
- * @since 0.0.1
- * @see KeyManager
- */
-public final class ManagedKey implements Serializable {
-	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
-	private Key key;
-	private PublicKey publicKey;
-	private String keyId;
-	private Instant activatedOn;
-	private Instant deactivatedOn;
-
-	private ManagedKey() {
-	}
-
-	/**
-	 * Returns {@code true} if this is a symmetric key, {@code false} otherwise.
-	 *
-	 * @return {@code true} if this is a symmetric key, {@code false} otherwise
-	 */
-	public boolean isSymmetric() {
-		return SecretKey.class.isAssignableFrom(this.key.getClass());
-	}
-
-	/**
-	 * Returns {@code true} if this is a asymmetric key, {@code false} otherwise.
-	 *
-	 * @return {@code true} if this is a asymmetric key, {@code false} otherwise
-	 */
-	public boolean isAsymmetric() {
-		return PrivateKey.class.isAssignableFrom(this.key.getClass());
-	}
-
-	/**
-	 * Returns a type of {@code java.security.Key},
-	 * e.g. {@code javax.crypto.SecretKey} or {@code java.security.PrivateKey}.
-	 *
-	 * @param <T> the type of {@code java.security.Key}
-	 * @return the type of {@code java.security.Key}
-	 */
-	@SuppressWarnings("unchecked")
-	public <T extends Key> T getKey() {
-		return (T) this.key;
-	}
-
-	/**
-	 * Returns the {@code java.security.PublicKey} if this is a asymmetric key, {@code null} otherwise.
-	 *
-	 * @return the {@code java.security.PublicKey} if this is a asymmetric key, {@code null} otherwise
-	 */
-	@Nullable
-	public PublicKey getPublicKey() {
-		return this.publicKey;
-	}
-
-	/**
-	 * Returns the key ID.
-	 *
-	 * @return the key ID
-	 */
-	public String getKeyId() {
-		return this.keyId;
-	}
-
-	/**
-	 * Returns the time when this key was activated.
-	 *
-	 * @return the time when this key was activated
-	 */
-	public Instant getActivatedOn() {
-		return this.activatedOn;
-	}
-
-	/**
-	 * Returns the time when this key was deactivated, {@code null} if still active.
-	 *
-	 * @return the time when this key was deactivated, {@code null} if still active
-	 */
-	@Nullable
-	public Instant getDeactivatedOn() {
-		return this.deactivatedOn;
-	}
-
-	/**
-	 * Returns {@code true} if this key is active, {@code false} otherwise.
-	 *
-	 * @return {@code true} if this key is active, {@code false} otherwise
-	 */
-	public boolean isActive() {
-		return getDeactivatedOn() == null;
-	}
-
-	/**
-	 * Returns the key algorithm.
-	 *
-	 * @return the key algorithm
-	 */
-	public String getAlgorithm() {
-		return this.key.getAlgorithm();
-	}
-
-	@Override
-	public boolean equals(Object obj) {
-		if (this == obj) {
-			return true;
-		}
-		if (obj == null || getClass() != obj.getClass()) {
-			return false;
-		}
-		ManagedKey that = (ManagedKey) obj;
-		return Objects.equals(this.keyId, that.keyId);
-	}
-
-	@Override
-	public int hashCode() {
-		return Objects.hash(this.keyId);
-	}
-
-	/**
-	 * Returns a new {@link Builder}, initialized with the provided {@code javax.crypto.SecretKey}.
-	 *
-	 * @param secretKey the {@code javax.crypto.SecretKey}
-	 * @return the {@link Builder}
-	 */
-	public static Builder withSymmetricKey(SecretKey secretKey) {
-		return new Builder(secretKey);
-	}
-
-	/**
-	 * Returns a new {@link Builder}, initialized with the provided
-	 * {@code java.security.PublicKey} and {@code java.security.PrivateKey}.
-	 *
-	 * @param publicKey the {@code java.security.PublicKey}
-	 * @param privateKey the {@code java.security.PrivateKey}
-	 * @return the {@link Builder}
-	 */
-	public static Builder withAsymmetricKey(PublicKey publicKey, PrivateKey privateKey) {
-		return new Builder(publicKey, privateKey);
-	}
-
-	/**
-	 * A builder for {@link ManagedKey}.
-	 */
-	public static class Builder {
-		private Key key;
-		private PublicKey publicKey;
-		private String keyId;
-		private Instant activatedOn;
-		private Instant deactivatedOn;
-
-		private Builder(SecretKey secretKey) {
-			Assert.notNull(secretKey, "secretKey cannot be null");
-			this.key = secretKey;
-		}
-
-		private Builder(PublicKey publicKey, PrivateKey privateKey) {
-			Assert.notNull(publicKey, "publicKey cannot be null");
-			Assert.notNull(privateKey, "privateKey cannot be null");
-			this.key = privateKey;
-			this.publicKey = publicKey;
-		}
-
-		/**
-		 * Sets the key ID.
-		 *
-		 * @param keyId the key ID
-		 * @return the {@link Builder}
-		 */
-		public Builder keyId(String keyId) {
-			this.keyId = keyId;
-			return this;
-		}
-
-		/**
-		 * Sets the time when this key was activated.
-		 *
-		 * @param activatedOn the time when this key was activated
-		 * @return the {@link Builder}
-		 */
-		public Builder activatedOn(Instant activatedOn) {
-			this.activatedOn = activatedOn;
-			return this;
-		}
-
-		/**
-		 * Sets the time when this key was deactivated.
-		 *
-		 * @param deactivatedOn the time when this key was deactivated
-		 * @return the {@link Builder}
-		 */
-		public Builder deactivatedOn(Instant deactivatedOn) {
-			this.deactivatedOn = deactivatedOn;
-			return this;
-		}
-
-		/**
-		 * Builds a new {@link ManagedKey}.
-		 *
-		 * @return a {@link ManagedKey}
-		 */
-		public ManagedKey build() {
-			Assert.hasText(this.keyId, "keyId cannot be empty");
-			Assert.notNull(this.activatedOn, "activatedOn cannot be null");
-
-			ManagedKey managedKey = new ManagedKey();
-			managedKey.key = this.key;
-			managedKey.publicKey = this.publicKey;
-			managedKey.keyId = this.keyId;
-			managedKey.activatedOn = this.activatedOn;
-			managedKey.deactivatedOn = this.deactivatedOn;
-			return managedKey;
-		}
-	}
-}

oauth2-authorization-server/src/main/java/org/springframework/security/crypto/keys/StaticKeyGeneratingKeyManager.java

@@ -1,89 +0,0 @@
-/*
- * Copyright 2020 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.crypto.keys;
-
-import org.springframework.lang.Nullable;
-import org.springframework.util.Assert;
-
-import javax.crypto.SecretKey;
-import java.security.KeyPair;
-import java.time.Instant;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.Map;
-import java.util.Set;
-import java.util.UUID;
-import java.util.stream.Collectors;
-import java.util.stream.Stream;
-
-import static org.springframework.security.crypto.keys.KeyGeneratorUtils.generateRsaKey;
-import static org.springframework.security.crypto.keys.KeyGeneratorUtils.generateSecretKey;
-
-/**
- * An implementation of a {@link KeyManager} that generates the {@link ManagedKey}(s) when constructed.
- *
- * <p>
- * <b>NOTE:</b> This implementation should ONLY be used during development/testing.
- *
- * @author Joe Grandja
- * @since 0.0.1
- * @see KeyManager
- */
-public final class StaticKeyGeneratingKeyManager implements KeyManager {
-	private final Map<String, ManagedKey> keys;
-
-	public StaticKeyGeneratingKeyManager() {
-		this.keys = Collections.unmodifiableMap(new HashMap<>(generateKeys()));
-	}
-
-	@Nullable
-	@Override
-	public ManagedKey findByKeyId(String keyId) {
-		Assert.hasText(keyId, "keyId cannot be empty");
-		return this.keys.get(keyId);
-	}
-
-	@Override
-	public Set<ManagedKey> findByAlgorithm(String algorithm) {
-		Assert.hasText(algorithm, "algorithm cannot be empty");
-		return this.keys.values().stream()
-				.filter(managedKey -> managedKey.getAlgorithm().equals(algorithm))
-				.collect(Collectors.toSet());
-	}
-
-	@Override
-	public Set<ManagedKey> getKeys() {
-		return new HashSet<>(this.keys.values());
-	}
-
-	private static Map<String, ManagedKey> generateKeys() {
-		KeyPair rsaKeyPair = generateRsaKey();
-		ManagedKey rsaManagedKey = ManagedKey.withAsymmetricKey(rsaKeyPair.getPublic(), rsaKeyPair.getPrivate())
-				.keyId(UUID.randomUUID().toString())
-				.activatedOn(Instant.now())
-				.build();
-
-		SecretKey hmacKey = generateSecretKey();
-		ManagedKey secretManagedKey = ManagedKey.withSymmetricKey(hmacKey)
-				.keyId(UUID.randomUUID().toString())
-				.activatedOn(Instant.now())
-				.build();
-
-		return Stream.of(rsaManagedKey, secretManagedKey)
-				.collect(Collectors.toMap(ManagedKey::getKeyId, v -> v));
-	}
-}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/AbstractOAuth2AuthorizationServerMetadata.java

@@ -0,0 +1,407 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core;
+
+import java.io.Serializable;
+import java.net.URI;
+import java.net.URL;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import org.springframework.util.Assert;
+
+/**
+ * A base representation of OAuth 2.0 Authorization Server metadata,
+ * returned by an endpoint defined in OAuth 2.0 Authorization Server Metadata and OpenID Connect Discovery 1.0.
+ * The metadata endpoint returns a set of claims an Authorization Server describes about its configuration.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @see OAuth2AuthorizationServerMetadataClaimAccessor
+ * @since 0.1.1
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc8414#section-3.2">3.2. Authorization Server Metadata Response</a>
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationResponse">4.2. OpenID Provider Configuration Response</a>
+ */
+public abstract class AbstractOAuth2AuthorizationServerMetadata implements OAuth2AuthorizationServerMetadataClaimAccessor, Serializable {
+	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
+	private final Map<String, Object> claims;
+
+	protected AbstractOAuth2AuthorizationServerMetadata(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		this.claims = Collections.unmodifiableMap(new LinkedHashMap<>(claims));
+	}
+
+	/**
+	 * Returns the metadata as claims.
+	 *
+	 * @return a {@code Map} of the metadata as claims
+	 */
+	@Override
+	public Map<String, Object> getClaims() {
+		return this.claims;
+	}
+
+	/**
+	 * A builder for subclasses of {@link AbstractOAuth2AuthorizationServerMetadata}.
+	 */
+	protected static abstract class AbstractBuilder<T extends AbstractOAuth2AuthorizationServerMetadata, B extends AbstractBuilder<T, B>> {
+		private final Map<String, Object> claims = new LinkedHashMap<>();
+
+		protected AbstractBuilder() {
+		}
+
+		protected Map<String, Object> getClaims() {
+			return this.claims;
+		}
+
+		@SuppressWarnings("unchecked")
+		protected final B getThis() {
+			return (B) this;	// avoid unchecked casts in subclasses by using "getThis()" instead of "(B) this"
+		};
+
+		/**
+		 * Use this {@code issuer} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, REQUIRED.
+		 *
+		 * @param issuer the {@code URL} of the Authorization Server's Issuer Identifier
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B issuer(String issuer) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.ISSUER, issuer);
+		}
+
+		/**
+		 * Use this {@code authorization_endpoint} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, REQUIRED.
+		 *
+		 * @param authorizationEndpoint the {@code URL} of the OAuth 2.0 Authorization Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B authorizationEndpoint(String authorizationEndpoint) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.AUTHORIZATION_ENDPOINT, authorizationEndpoint);
+		}
+
+		/**
+		 * Use this {@code token_endpoint} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, REQUIRED.
+		 *
+		 * @param tokenEndpoint the {@code URL} of the OAuth 2.0 Token Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenEndpoint(String tokenEndpoint) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT, tokenEndpoint);
+		}
+
+		/**
+		 * Add this client authentication method to the collection of {@code token_endpoint_auth_methods_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param authenticationMethod the client authentication method supported by the OAuth 2.0 Token Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenEndpointAuthenticationMethod(String authenticationMethod) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethod);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the client authentication method(s) allowing the ability to add, replace, or remove.
+		 *
+		 * @param authenticationMethodsConsumer a {@code Consumer} of the client authentication method(s) supported by the OAuth 2.0 Token Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenEndpointAuthenticationMethods(Consumer<List<String>> authenticationMethodsConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethodsConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Use this {@code jwks_uri} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param jwkSetUrl the {@code URL} of the JSON Web Key Set
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B jwkSetUrl(String jwkSetUrl) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.JWKS_URI, jwkSetUrl);
+		}
+
+		/**
+		 * Add this OAuth 2.0 {@code scope} to the collection of {@code scopes_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, RECOMMENDED.
+		 *
+		 * @param scope the OAuth 2.0 {@code scope} value supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B scope(String scope) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED, scope);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code scope} values supported allowing the ability to add, replace, or remove.
+		 *
+		 * @param scopesConsumer a {@code Consumer} of the OAuth 2.0 {@code scope} values supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B scopes(Consumer<List<String>> scopesConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED, scopesConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Add this OAuth 2.0 {@code response_type} to the collection of {@code response_types_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, REQUIRED.
+		 *
+		 * @param responseType the OAuth 2.0 {@code response_type} value supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B responseType(String responseType) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED, responseType);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code response_type} values supported allowing the ability to add, replace, or remove.
+		 *
+		 * @param responseTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code response_type} values supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B responseTypes(Consumer<List<String>> responseTypesConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED, responseTypesConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Add this OAuth 2.0 {@code grant_type} to the collection of {@code grant_types_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param grantType the OAuth 2.0 {@code grant_type} value supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B grantType(String grantType) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED, grantType);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code grant_type} values supported allowing the ability to add, replace, or remove.
+		 *
+		 * @param grantTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code grant_type} values supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B grantTypes(Consumer<List<String>> grantTypesConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED, grantTypesConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Use this {@code revocation_endpoint} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param tokenRevocationEndpoint the {@code URL} of the OAuth 2.0 Token Revocation Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenRevocationEndpoint(String tokenRevocationEndpoint) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT, tokenRevocationEndpoint);
+		}
+
+		/**
+		 * Add this client authentication method to the collection of {@code revocation_endpoint_auth_methods_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param authenticationMethod the client authentication method supported by the OAuth 2.0 Token Revocation Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenRevocationEndpointAuthenticationMethod(String authenticationMethod) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethod);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the client authentication method(s) allowing the ability to add, replace, or remove.
+		 *
+		 * @param authenticationMethodsConsumer a {@code Consumer} of the client authentication method(s) supported by the OAuth 2.0 Token Revocation Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenRevocationEndpointAuthenticationMethods(Consumer<List<String>> authenticationMethodsConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethodsConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Use this {@code introspection_endpoint} in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param tokenIntrospectionEndpoint the {@code URL} of the OAuth 2.0 Token Introspection Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenIntrospectionEndpoint(String tokenIntrospectionEndpoint) {
+			return claim(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT, tokenIntrospectionEndpoint);
+		}
+
+		/**
+		 * Add this client authentication method to the collection of {@code introspection_endpoint_auth_methods_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param authenticationMethod the client authentication method supported by the OAuth 2.0 Token Introspection Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenIntrospectionEndpointAuthenticationMethod(String authenticationMethod) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethod);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the client authentication method(s) allowing the ability to add, replace, or remove.
+		 *
+		 * @param authenticationMethodsConsumer a {@code Consumer} of the client authentication method(s) supported by the OAuth 2.0 Token Introspection Endpoint
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B tokenIntrospectionEndpointAuthenticationMethods(Consumer<List<String>> authenticationMethodsConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED, authenticationMethodsConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Add this Proof Key for Code Exchange (PKCE) {@code code_challenge_method} to the collection of {@code code_challenge_methods_supported}
+		 * in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}, OPTIONAL.
+		 *
+		 * @param codeChallengeMethod the {@code code_challenge_method} value supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B codeChallengeMethod(String codeChallengeMethod) {
+			addClaimToClaimList(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED, codeChallengeMethod);
+			return getThis();
+		}
+
+		/**
+		 * A {@code Consumer} of the Proof Key for Code Exchange (PKCE) {@code code_challenge_method} values supported allowing the ability to add, replace, or remove.
+		 *
+		 * @param codeChallengeMethodsConsumer a {@code Consumer} of the {@code code_challenge_method} values supported
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B codeChallengeMethods(Consumer<List<String>> codeChallengeMethodsConsumer) {
+			acceptClaimValues(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED, codeChallengeMethodsConsumer);
+			return getThis();
+		}
+
+		/**
+		 * Use this claim in the resulting {@link AbstractOAuth2AuthorizationServerMetadata}.
+		 *
+		 * @param name the claim name
+		 * @param value the claim value
+		 * @return the {@link AbstractBuilder} for further configuration
+		 */
+		public B claim(String name, Object value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			this.claims.put(name, value);
+			return getThis();
+		}
+
+		/**
+		 * Provides access to every {@link #claim(String, Object)} declared so far with
+		 * the possibility to add, replace, or remove.
+		 *
+		 * @param claimsConsumer a {@code Consumer} of the claims
+		 * @return the {@link AbstractBuilder} for further configurations
+		 */
+		public B claims(Consumer<Map<String, Object>> claimsConsumer) {
+			claimsConsumer.accept(this.claims);
+			return getThis();
+		}
+
+		/**
+		 * Creates the {@link AbstractOAuth2AuthorizationServerMetadata}.
+		 *
+		 * @return the {@link AbstractOAuth2AuthorizationServerMetadata}
+		 */
+		public abstract T build();
+
+		protected void validate() {
+			Assert.notNull(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.ISSUER), "issuer cannot be null");
+			validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.ISSUER), "issuer must be a valid URL");
+			Assert.notNull(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.AUTHORIZATION_ENDPOINT), "authorizationEndpoint cannot be null");
+			validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.AUTHORIZATION_ENDPOINT), "authorizationEndpoint must be a valid URL");
+			Assert.notNull(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT), "tokenEndpoint cannot be null");
+			validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT), "tokenEndpoint must be a valid URL");
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenEndpointAuthenticationMethods must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenEndpointAuthenticationMethods cannot be empty");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.JWKS_URI) != null) {
+				validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.JWKS_URI), "jwksUri must be a valid URL");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED), "scopes must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED), "scopes cannot be empty");
+			}
+			Assert.notNull(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED), "responseTypes cannot be null");
+			Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED), "responseTypes must be of type List");
+			Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED), "responseTypes cannot be empty");
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED), "grantTypes must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED), "grantTypes cannot be empty");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT) != null) {
+				validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT), "tokenRevocationEndpoint must be a valid URL");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenRevocationEndpointAuthenticationMethods must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenRevocationEndpointAuthenticationMethods cannot be empty");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT) != null) {
+				validateURL(getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT), "tokenIntrospectionEndpoint must be a valid URL");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenIntrospectionEndpointAuthenticationMethods must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED), "tokenIntrospectionEndpointAuthenticationMethods cannot be empty");
+			}
+			if (getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED) != null) {
+				Assert.isInstanceOf(List.class, getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED), "codeChallengeMethods must be of type List");
+				Assert.notEmpty((List<?>) getClaims().get(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED), "codeChallengeMethods cannot be empty");
+			}
+		}
+
+		@SuppressWarnings("unchecked")
+		private void addClaimToClaimList(String name, String value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			getClaims().computeIfAbsent(name, k -> new LinkedList<String>());
+			((List<String>) getClaims().get(name)).add(value);
+		}
+
+		@SuppressWarnings("unchecked")
+		private void acceptClaimValues(String name, Consumer<List<String>> valuesConsumer) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(valuesConsumer, "valuesConsumer cannot be null");
+			getClaims().computeIfAbsent(name, k -> new LinkedList<String>());
+			List<String> values = (List<String>) getClaims().get(name);
+			valuesConsumer.accept(values);
+		}
+
+		private static void validateURL(Object url, String errorMessage) {
+			if (URL.class.isAssignableFrom(url.getClass())) {
+				return;
+			}
+
+			try {
+				new URI(url.toString()).toURL();
+			} catch (Exception ex) {
+				throw new IllegalArgumentException(errorMessage, ex);
+			}
+		}
+
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2AuthorizationCode.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core;
+
+import java.time.Instant;
+
+/**
+ * An implementation of an {@link AbstractOAuth2Token}
+ * representing an OAuth 2.0 Authorization Code Grant.
+ *
+ * @author Joe Grandja
+ * @since 0.0.3
+ * @see AbstractOAuth2Token
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc6749#section-4.1">Section 4.1 Authorization Code Grant</a>
+ */
+public class OAuth2AuthorizationCode extends AbstractOAuth2Token {
+
+	/**
+	 * Constructs an {@code OAuth2AuthorizationCode} using the provided parameters.
+	 * @param tokenValue the token value
+	 * @param issuedAt the time at which the token was issued
+	 * @param expiresAt the time at which the token expires
+	 */
+	public OAuth2AuthorizationCode(String tokenValue, Instant issuedAt, Instant expiresAt) {
+		super(tokenValue, issuedAt, expiresAt);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2AuthorizationServerMetadata.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core;
+
+import java.util.Map;
+
+import org.springframework.util.Assert;
+
+/**
+ * A representation of an OAuth 2.0 Authorization Server Metadata response,
+ * which is returned from an OAuth 2.0 Authorization Server's Metadata Endpoint,
+ * and contains a set of claims about the Authorization Server's configuration.
+ * The claims are defined by the OAuth 2.0 Authorization Server Metadata
+ * specification (RFC 8414).
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.1
+ * @see AbstractOAuth2AuthorizationServerMetadata
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc8414#section-3.2">3.2. Authorization Server Metadata Response</a>
+ */
+public final class OAuth2AuthorizationServerMetadata extends AbstractOAuth2AuthorizationServerMetadata {
+
+	private OAuth2AuthorizationServerMetadata(Map<String, Object> claims) {
+		super(claims);
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with empty claims.
+	 *
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with the provided claims.
+	 *
+	 * @param claims the claims to initialize the builder
+	 * @return the {@link Builder}
+	 */
+	public static Builder withClaims(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		return new Builder()
+				.claims(c -> c.putAll(claims));
+	}
+
+	/**
+	 * Helps configure an {@link OAuth2AuthorizationServerMetadata}.
+	 */
+	public static class Builder extends AbstractBuilder<OAuth2AuthorizationServerMetadata, Builder> {
+
+		private Builder() {
+		}
+
+		/**
+		 * Validate the claims and build the {@link OAuth2AuthorizationServerMetadata}.
+		 * <p>
+		 * The following claims are REQUIRED:
+		 * {@code issuer}, {@code authorization_endpoint}, {@code token_endpoint}
+		 * and {@code response_types_supported}.
+		 *
+		 * @return the {@link OAuth2AuthorizationServerMetadata}
+		 */
+		@Override
+		public OAuth2AuthorizationServerMetadata build() {
+			validate();
+			return new OAuth2AuthorizationServerMetadata(getClaims());
+		}
+
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2AuthorizationServerMetadataClaimAccessor.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core;
+
+import java.net.URL;
+import java.util.List;
+
+/**
+ * A {@link ClaimAccessor} for the "claims" an Authorization Server describes about its configuration,
+ * used in OAuth 2.0 Authorization Server Metadata and OpenID Connect Discovery 1.0.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.1
+ * @see ClaimAccessor
+ * @see OAuth2AuthorizationServerMetadataClaimNames
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc8414#section-2">2. Authorization Server Metadata</a>
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata">3. OpenID Provider Metadata</a>
+ */
+public interface OAuth2AuthorizationServerMetadataClaimAccessor extends ClaimAccessor {
+
+	/**
+	 * Returns the {@code URL} the Authorization Server asserts as its Issuer Identifier {@code (issuer)}.
+	 *
+	 * @return the {@code URL} the Authorization Server asserts as its Issuer Identifier
+	 */
+	default URL getIssuer() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.ISSUER);
+	}
+
+	/**
+	 * Returns the {@code URL} of the OAuth 2.0 Authorization Endpoint {@code (authorization_endpoint)}.
+	 *
+	 * @return the {@code URL} of the OAuth 2.0 Authorization Endpoint
+	 */
+	default URL getAuthorizationEndpoint() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.AUTHORIZATION_ENDPOINT);
+	}
+
+	/**
+	 * Returns the {@code URL} of the OAuth 2.0 Token Endpoint {@code (token_endpoint)}.
+	 *
+	 * @return the {@code URL} of the OAuth 2.0 Token Endpoint
+	 */
+	default URL getTokenEndpoint() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT);
+	}
+
+	/**
+	 * Returns the client authentication methods supported by the OAuth 2.0 Token Endpoint {@code (token_endpoint_auth_methods_supported)}.
+	 *
+	 * @return the client authentication methods supported by the OAuth 2.0 Token Endpoint
+	 */
+	default List<String> getTokenEndpointAuthenticationMethods() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED);
+	}
+
+	/**
+	 * Returns the {@code URL} of the JSON Web Key Set {@code (jwks_uri)}.
+	 *
+	 * @return the {@code URL} of the JSON Web Key Set
+	 */
+	default URL getJwkSetUrl() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.JWKS_URI);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code scope} values supported {@code (scopes_supported)}.
+	 *
+	 * @return the OAuth 2.0 {@code scope} values supported
+	 */
+	default List<String> getScopes() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code response_type} values supported {@code (response_types_supported)}.
+	 *
+	 * @return the OAuth 2.0 {@code response_type} values supported
+	 */
+	default List<String> getResponseTypes() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code grant_type} values supported {@code (grant_types_supported)}.
+	 *
+	 * @return the OAuth 2.0 {@code grant_type} values supported
+	 */
+	default List<String> getGrantTypes() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED);
+	}
+
+	/**
+	 * Returns the {@code URL} of the OAuth 2.0 Token Revocation Endpoint {@code (revocation_endpoint)}.
+	 *
+	 * @return the {@code URL} of the OAuth 2.0 Token Revocation Endpoint
+	 */
+	default URL getTokenRevocationEndpoint() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT);
+	}
+
+	/**
+	 * Returns the client authentication methods supported by the OAuth 2.0 Token Revocation Endpoint {@code (revocation_endpoint_auth_methods_supported)}.
+	 *
+	 * @return the client authentication methods supported by the OAuth 2.0 Token Revocation Endpoint
+	 */
+	default List<String> getTokenRevocationEndpointAuthenticationMethods() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED);
+	}
+
+	/**
+	 * Returns the {@code URL} of the OAuth 2.0 Token Introspection Endpoint {@code (introspection_endpoint)}.
+	 *
+	 * @return the {@code URL} of the OAuth 2.0 Token Introspection Endpoint
+	 */
+	default URL getTokenIntrospectionEndpoint() {
+		return getClaimAsURL(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT);
+	}
+
+	/**
+	 * Returns the client authentication methods supported by the OAuth 2.0 Token Introspection Endpoint {@code (introspection_endpoint_auth_methods_supported)}.
+	 *
+	 * @return the client authentication methods supported by the OAuth 2.0 Token Introspection Endpoint
+	 */
+	default List<String> getTokenIntrospectionEndpointAuthenticationMethods() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED);
+	}
+
+	/**
+	 * Returns the Proof Key for Code Exchange (PKCE) {@code code_challenge_method} values supported {@code (code_challenge_methods_supported)}.
+	 *
+	 * @return the {@code code_challenge_method} values supported
+	 */
+	default List<String> getCodeChallengeMethods() {
+		return getClaimAsStringList(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2AuthorizationServerMetadataClaimNames.java

@@ -0,0 +1,94 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core;
+
+/**
+ * The names of the "claims" an Authorization Server describes about its configuration,
+ * used in OAuth 2.0 Authorization Server Metadata and OpenID Connect Discovery 1.0.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.1
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc8414#section-2">2. Authorization Server Metadata</a>
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata">3. OpenID Provider Metadata</a>
+ */
+public interface OAuth2AuthorizationServerMetadataClaimNames {
+
+	/**
+	 * {@code issuer} - the {@code URL} the Authorization Server asserts as its Issuer Identifier
+	 */
+	String ISSUER = "issuer";
+
+	/**
+	 * {@code authorization_endpoint} - the {@code URL} of the OAuth 2.0 Authorization Endpoint
+	 */
+	String AUTHORIZATION_ENDPOINT = "authorization_endpoint";
+
+	/**
+	 * {@code token_endpoint} - the {@code URL} of the OAuth 2.0 Token Endpoint
+	 */
+	String TOKEN_ENDPOINT = "token_endpoint";
+
+	/**
+	 * {@code token_endpoint_auth_methods_supported} - the client authentication methods supported by the OAuth 2.0 Token Endpoint
+	 */
+	String TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED = "token_endpoint_auth_methods_supported";
+
+	/**
+	 * {@code jwks_uri} - the {@code URL} of the JSON Web Key Set
+	 */
+	String JWKS_URI = "jwks_uri";
+
+	/**
+	 * {@code scopes_supported} - the OAuth 2.0 {@code scope} values supported
+	 */
+	String SCOPES_SUPPORTED = "scopes_supported";
+
+	/**
+	 * {@code response_types_supported} - the OAuth 2.0 {@code response_type} values supported
+	 */
+	String RESPONSE_TYPES_SUPPORTED = "response_types_supported";
+
+	/**
+	 * {@code grant_types_supported} - the OAuth 2.0 {@code grant_type} values supported
+	 */
+	String GRANT_TYPES_SUPPORTED = "grant_types_supported";
+
+	/**
+	 * {@code revocation_endpoint} - the {@code URL} of the OAuth 2.0 Token Revocation Endpoint
+	 */
+	String REVOCATION_ENDPOINT = "revocation_endpoint";
+
+	/**
+	 * {@code revocation_endpoint_auth_methods_supported} - the client authentication methods supported by the OAuth 2.0 Token Revocation Endpoint
+	 */
+	String REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED = "revocation_endpoint_auth_methods_supported";
+
+	/**
+	 * {@code introspection_endpoint} - the {@code URL} of the OAuth 2.0 Token Introspection Endpoint
+	 */
+	String INTROSPECTION_ENDPOINT = "introspection_endpoint";
+
+	/**
+	 * {@code introspection_endpoint_auth_methods_supported} - the client authentication methods supported by the OAuth 2.0 Token Introspection Endpoint
+	 */
+	String INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED = "introspection_endpoint_auth_methods_supported";
+
+	/**
+	 * {@code code_challenge_methods_supported} - the Proof Key for Code Exchange (PKCE) {@code code_challenge_method} values supported
+	 */
+	String CODE_CHALLENGE_METHODS_SUPPORTED = "code_challenge_methods_supported";
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2TokenIntrospection.java

@@ -0,0 +1,336 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.core;
+
+import java.io.Serializable;
+import java.net.URI;
+import java.net.URL;
+import java.time.Instant;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import org.springframework.util.Assert;
+
+/**
+ * A representation of the claims returned in an OAuth 2.0 Token Introspection Response.
+ *
+ * @author Gerardo Roza
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see OAuth2TokenIntrospectionClaimAccessor
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7662#section-2.2">Section 2.2 Introspection Response</a>
+ */
+public final class OAuth2TokenIntrospection implements OAuth2TokenIntrospectionClaimAccessor, Serializable {
+	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
+	private final Map<String, Object> claims;
+
+	private OAuth2TokenIntrospection(Map<String, Object> claims) {
+		this.claims = Collections.unmodifiableMap(new LinkedHashMap<>(claims));
+	}
+
+	/**
+	 * Returns the claims in the Token Introspection Response.
+	 *
+	 * @return a {@code Map} of the claims
+	 */
+	@Override
+	public Map<String, Object> getClaims() {
+		return this.claims;
+	}
+
+	/**
+	 * Constructs a new {@link Builder} initialized with the {@link #isActive() active} claim to {@code false}.
+	 *
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder() {
+		return builder(false);
+	}
+
+	/**
+	 * Constructs a new {@link Builder} initialized with the provided {@link #isActive() active} claim.
+	 *
+	 * @param active {@code true} if the token is currently active, {@code false} otherwise
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder(boolean active) {
+		return new Builder(active);
+	}
+
+	/**
+	 * Constructs a new {@link Builder} initialized with the provided claims.
+	 *
+	 * @param claims the claims to initialize the builder
+	 * @return the {@link Builder}
+	 */
+	public static Builder withClaims(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		return builder().claims(c -> c.putAll(claims));
+	}
+
+	/**
+	 * A builder for {@link OAuth2TokenIntrospection}.
+	 */
+	public static class Builder {
+		private final Map<String, Object> claims = new LinkedHashMap<>();
+
+		private Builder(boolean active) {
+			active(active);
+		}
+
+		/**
+		 * Sets the indicator of whether or not the presented token is currently active, REQUIRED.
+		 *
+		 * @param active {@code true} if the token is currently active, {@code false} otherwise
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder active(boolean active) {
+			return claim(OAuth2TokenIntrospectionClaimNames.ACTIVE, active);
+		}
+
+		/**
+		 * Add the scope associated with this token, OPTIONAL.
+		 *
+		 * @param scope the scope associated with this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder scope(String scope) {
+			addClaimToClaimList(OAuth2TokenIntrospectionClaimNames.SCOPE, scope);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the scope(s) associated with this token,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param scopesConsumer a {@code Consumer} of the scope(s) associated with this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder scopes(Consumer<List<String>> scopesConsumer) {
+			acceptClaimValues(OAuth2TokenIntrospectionClaimNames.SCOPE, scopesConsumer);
+			return this;
+		}
+
+		/**
+		 * Sets the client identifier for the OAuth 2.0 client that requested this token, OPTIONAL.
+		 *
+		 * @param clientId the client identifier for the OAuth 2.0 client that requested this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientId(String clientId) {
+			return claim(OAuth2TokenIntrospectionClaimNames.CLIENT_ID, clientId);
+		}
+
+		/**
+		 * Sets the human-readable identifier for the resource owner who authorized this token, OPTIONAL.
+		 *
+		 * @param username the human-readable identifier for the resource owner who authorized this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder username(String username) {
+			return claim(OAuth2TokenIntrospectionClaimNames.USERNAME, username);
+		}
+
+		/**
+		 * Sets the token type (e.g. bearer), OPTIONAL.
+		 *
+		 * @param tokenType the token type
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder tokenType(String tokenType) {
+			return claim(OAuth2TokenIntrospectionClaimNames.TOKEN_TYPE, tokenType);
+		}
+
+		/**
+		 * Sets the time indicating when this token will expire, OPTIONAL.
+		 *
+		 * @param expiresAt the time indicating when this token will expire
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder expiresAt(Instant expiresAt) {
+			return claim(OAuth2TokenIntrospectionClaimNames.EXP, expiresAt);
+		}
+
+		/**
+		 * Sets the time indicating when this token was originally issued, OPTIONAL.
+		 *
+		 * @param issuedAt the time indicating when this token was originally issued
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder issuedAt(Instant issuedAt) {
+			return claim(OAuth2TokenIntrospectionClaimNames.IAT, issuedAt);
+		}
+
+		/**
+		 * Sets the time indicating when this token is not to be used before, OPTIONAL.
+		 *
+		 * @param notBefore the time indicating when this token is not to be used before
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder notBefore(Instant notBefore) {
+			return claim(OAuth2TokenIntrospectionClaimNames.NBF, notBefore);
+		}
+
+		/**
+		 * Sets the subject of the token, usually a machine-readable identifier
+		 * of the resource owner who authorized this token, OPTIONAL.
+		 *
+		 * @param subject the subject of the token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder subject(String subject) {
+			return claim(OAuth2TokenIntrospectionClaimNames.SUB, subject);
+		}
+
+		/**
+		 * Add the identifier representing the intended audience for this token, OPTIONAL.
+		 *
+		 * @param audience the identifier representing the intended audience for this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder audience(String audience) {
+			addClaimToClaimList(OAuth2TokenIntrospectionClaimNames.AUD, audience);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the intended audience(s) for this token,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param audiencesConsumer a {@code Consumer} of the intended audience(s) for this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder audiences(Consumer<List<String>> audiencesConsumer) {
+			acceptClaimValues(OAuth2TokenIntrospectionClaimNames.AUD, audiencesConsumer);
+			return this;
+		}
+
+		/**
+		 * Sets the issuer of this token, OPTIONAL.
+		 *
+		 * @param issuer the issuer of this token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder issuer(String issuer) {
+			return claim(OAuth2TokenIntrospectionClaimNames.ISS, issuer);
+		}
+
+		/**
+		 * Sets the identifier for the token, OPTIONAL.
+		 *
+		 * @param jti the identifier for the token
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder id(String jti) {
+			return claim(OAuth2TokenIntrospectionClaimNames.JTI, jti);
+		}
+
+		/**
+		 * Sets the claim.
+		 *
+		 * @param name the claim name
+		 * @param value the claim value
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder claim(String name, Object value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			this.claims.put(name, value);
+			return this;
+		}
+
+		/**
+		 * Provides access to every {@link #claim(String, Object)} declared so far with
+		 * the possibility to add, replace, or remove.
+		 *
+		 * @param claimsConsumer a {@code Consumer} of the claims
+		 * @return the {@link Builder} for further configurations
+		 */
+		public Builder claims(Consumer<Map<String, Object>> claimsConsumer) {
+			claimsConsumer.accept(this.claims);
+			return this;
+		}
+
+		/**
+		 * Validate the claims and build the {@link OAuth2TokenIntrospection}.
+		 * <p>
+		 * The following claims are REQUIRED: {@code active}
+		 *
+		 * @return the {@link OAuth2TokenIntrospection}
+		 */
+		public OAuth2TokenIntrospection build() {
+			validate();
+			return new OAuth2TokenIntrospection(this.claims);
+		}
+
+		private void validate() {
+			Assert.notNull(this.claims.get(OAuth2TokenIntrospectionClaimNames.ACTIVE), "active cannot be null");
+			Assert.isInstanceOf(Boolean.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.ACTIVE), "active must be of type boolean");
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.SCOPE)) {
+				Assert.isInstanceOf(List.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.SCOPE), "scope must be of type List");
+			}
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.EXP)) {
+				Assert.isInstanceOf(Instant.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.EXP), "exp must be of type Instant");
+			}
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.IAT)) {
+				Assert.isInstanceOf(Instant.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.IAT), "iat must be of type Instant");
+			}
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.NBF)) {
+				Assert.isInstanceOf(Instant.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.NBF), "nbf must be of type Instant");
+			}
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.AUD)) {
+				Assert.isInstanceOf(List.class, this.claims.get(OAuth2TokenIntrospectionClaimNames.AUD), "aud must be of type List");
+			}
+			if (this.claims.containsKey(OAuth2TokenIntrospectionClaimNames.ISS)) {
+				validateURL(this.claims.get(OAuth2TokenIntrospectionClaimNames.ISS), "iss must be a valid URL");
+			}
+		}
+
+		@SuppressWarnings("unchecked")
+		private void addClaimToClaimList(String name, String value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			this.claims.computeIfAbsent(name, k -> new LinkedList<String>());
+			((List<String>) this.claims.get(name)).add(value);
+		}
+
+		@SuppressWarnings("unchecked")
+		private void acceptClaimValues(String name, Consumer<List<String>> valuesConsumer) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(valuesConsumer, "valuesConsumer cannot be null");
+			this.claims.computeIfAbsent(name, k -> new LinkedList<String>());
+			List<String> values = (List<String>) this.claims.get(name);
+			valuesConsumer.accept(values);
+		}
+
+		private static void validateURL(Object url, String errorMessage) {
+			if (URL.class.isAssignableFrom(url.getClass())) {
+				return;
+			}
+
+			try {
+				new URI(url.toString()).toURL();
+			} catch (Exception ex) {
+				throw new IllegalArgumentException(errorMessage, ex);
+			}
+		}
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2TokenIntrospectionClaimAccessor.java

@@ -0,0 +1,148 @@
+/*
+ * Copyright 2002-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.core;
+
+import java.net.URL;
+import java.time.Instant;
+import java.util.List;
+
+/*
+ * TODO
+ * This class is "mostly" a copy from Spring Security and should be removed after upgrading to Spring Security 5.6.0 GA.
+ * The major changes made between the Spring Security class and this one are:
+ *	1) Class renamed from `OAuth2IntrospectionClaimAccessor` to `OAuth2TokenIntrospectionClaimAccessor`
+ *	2) Moved from package `org.springframework.security.oauth2.server.resource.introspection` to `org.springframework.security.oauth2.core`
+ *
+ * gh-9647 Move and rename OAuth2IntrospectionClaimAccessor/Names
+ * https://github.com/spring-projects/spring-security/issues/9647
+ */
+
+/**
+ * A {@link ClaimAccessor} for the "claims" that may be contained in the
+ * Introspection Response.
+ *
+ * @author David Kovac
+ * @since 5.4
+ * @see ClaimAccessor
+ * @see OAuth2TokenIntrospectionClaimNames
+ * @see <a target="_blank" href=
+ * "https://tools.ietf.org/html/rfc7662#section-2.2">Introspection Response</a>
+ */
+public interface OAuth2TokenIntrospectionClaimAccessor extends ClaimAccessor {
+
+	/**
+	 * Returns the indicator {@code (active)} whether or not the token is currently active
+	 * @return the indicator whether or not the token is currently active
+	 */
+	default boolean isActive() {
+		return Boolean.TRUE.equals(getClaimAsBoolean(OAuth2TokenIntrospectionClaimNames.ACTIVE));
+	}
+
+	/**
+	 * Returns the scopes {@code (scope)} associated with the token
+	 * @return the scopes associated with the token
+	 */
+	default List<String> getScopes() {
+		return getClaimAsStringList(OAuth2TokenIntrospectionClaimNames.SCOPE);
+	}
+
+	/**
+	 * Returns the client identifier {@code (client_id)} for the token
+	 * @return the client identifier for the token
+	 */
+	default String getClientId() {
+		return getClaimAsString(OAuth2TokenIntrospectionClaimNames.CLIENT_ID);
+	}
+
+	/**
+	 * Returns a human-readable identifier {@code (username)} for the resource owner that
+	 * authorized the token
+	 * @return a human-readable identifier for the resource owner that authorized the
+	 * token
+	 */
+	default String getUsername() {
+		return getClaimAsString(OAuth2TokenIntrospectionClaimNames.USERNAME);
+	}
+
+	/**
+	 * Returns the type of the token {@code (token_type)}, for example {@code bearer}.
+	 * @return the type of the token, for example {@code bearer}.
+	 */
+	default String getTokenType() {
+		return getClaimAsString(OAuth2TokenIntrospectionClaimNames.TOKEN_TYPE);
+	}
+
+	/**
+	 * Returns a timestamp {@code (exp)} indicating when the token expires
+	 * @return a timestamp indicating when the token expires
+	 */
+	default Instant getExpiresAt() {
+		return getClaimAsInstant(OAuth2TokenIntrospectionClaimNames.EXP);
+	}
+
+	/**
+	 * Returns a timestamp {@code (iat)} indicating when the token was issued
+	 * @return a timestamp indicating when the token was issued
+	 */
+	default Instant getIssuedAt() {
+		return getClaimAsInstant(OAuth2TokenIntrospectionClaimNames.IAT);
+	}
+
+	/**
+	 * Returns a timestamp {@code (nbf)} indicating when the token is not to be used
+	 * before
+	 * @return a timestamp indicating when the token is not to be used before
+	 */
+	default Instant getNotBefore() {
+		return getClaimAsInstant(OAuth2TokenIntrospectionClaimNames.NBF);
+	}
+
+	/**
+	 * Returns usually a machine-readable identifier {@code (sub)} of the resource owner
+	 * who authorized the token
+	 * @return usually a machine-readable identifier of the resource owner who authorized
+	 * the token
+	 */
+	default String getSubject() {
+		return getClaimAsString(OAuth2TokenIntrospectionClaimNames.SUB);
+	}
+
+	/**
+	 * Returns the intended audience {@code (aud)} for the token
+	 * @return the intended audience for the token
+	 */
+	default List<String> getAudience() {
+		return getClaimAsStringList(OAuth2TokenIntrospectionClaimNames.AUD);
+	}
+
+	/**
+	 * Returns the issuer {@code (iss)} of the token
+	 * @return the issuer of the token
+	 */
+	default URL getIssuer() {
+		return getClaimAsURL(OAuth2TokenIntrospectionClaimNames.ISS);
+	}
+
+	/**
+	 * Returns the identifier {@code (jti)} for the token
+	 * @return the identifier for the token
+	 */
+	default String getId() {
+		return getClaimAsString(OAuth2TokenIntrospectionClaimNames.JTI);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2TokenIntrospectionClaimNames.java

@@ -0,0 +1,102 @@
+/*
+ * Copyright 2002-2019 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.core;
+
+/*
+ * TODO
+ * This class is "mostly" a copy from Spring Security and should be removed after upgrading to Spring Security 5.6.0 GA.
+ * The major changes made between the Spring Security class and this one are:
+ *	1) Class renamed from `OAuth2IntrospectionClaimNames` to `OAuth2TokenIntrospectionClaimNames`
+ *	2) Moved from package `org.springframework.security.oauth2.server.resource.introspection` to `org.springframework.security.oauth2.core`
+ *
+ * gh-9647 Move and rename OAuth2IntrospectionClaimAccessor/Names
+ * https://github.com/spring-projects/spring-security/issues/9647
+ */
+
+/**
+ * The names of the "Introspection Claims" defined by an
+ * <a target="_blank" href="https://tools.ietf.org/html/rfc7662#section-2.2">Introspection
+ * Response</a>.
+ *
+ * @author Josh Cummings
+ * @since 5.2
+ */
+public interface OAuth2TokenIntrospectionClaimNames {
+
+	/**
+	 * {@code active} - Indicator whether or not the token is currently active
+	 */
+	String ACTIVE = "active";
+
+	/**
+	 * {@code scope} - The scopes for the token
+	 */
+	String SCOPE = "scope";
+
+	/**
+	 * {@code client_id} - The Client identifier for the token
+	 */
+	String CLIENT_ID = "client_id";
+
+	/**
+	 * {@code username} - A human-readable identifier for the resource owner that
+	 * authorized the token
+	 */
+	String USERNAME = "username";
+
+	/**
+	 * {@code token_type} - The type of the token, for example {@code bearer}.
+	 */
+	String TOKEN_TYPE = "token_type";
+
+	/**
+	 * {@code exp} - A timestamp indicating when the token expires
+	 */
+	String EXP = "exp";
+
+	/**
+	 * {@code iat} - A timestamp indicating when the token was issued
+	 */
+	String IAT = "iat";
+
+	/**
+	 * {@code nbf} - A timestamp indicating when the token is not to be used before
+	 */
+	String NBF = "nbf";
+
+	/**
+	 * {@code sub} - Usually a machine-readable identifier of the resource owner who
+	 * authorized the token
+	 */
+	String SUB = "sub";
+
+	/**
+	 * {@code aud} - The intended audience for the token
+	 */
+	String AUD = "aud";
+
+	/**
+	 * {@code iss} - The issuer of the token
+	 */
+	String ISS = "iss";
+
+	/**
+	 * {@code jti} - The identifier for the token
+	 */
+	String JTI = "jti";
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/OAuth2TokenType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,27 +13,40 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.server.authorization;
-
-import org.springframework.security.oauth2.server.authorization.Version;
-import org.springframework.util.Assert;
+package org.springframework.security.oauth2.core;
 
 import java.io.Serializable;
 
+import org.springframework.util.Assert;
+
 /**
+ * Standard token types defined in the OAuth Token Type Hints Registry.
+ *
  * @author Joe Grandja
+ * @since 0.0.1
+ * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7009#section-4.1.2">4.1.2 OAuth Token Type Hints Registry</a>
  */
-public final class TokenType implements Serializable {
+public final class OAuth2TokenType implements Serializable {
 	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
-	public static final TokenType ACCESS_TOKEN = new TokenType("access_token");
-	public static final TokenType AUTHORIZATION_CODE = new TokenType("authorization_code");
+	public static final OAuth2TokenType ACCESS_TOKEN = new OAuth2TokenType("access_token");
+	public static final OAuth2TokenType REFRESH_TOKEN = new OAuth2TokenType("refresh_token");
 	private final String value;
 
-	public TokenType(String value) {
+	/**
+	 * Constructs an {@code OAuth2TokenType} using the provided value.
+	 *
+	 * @param value the value of the token type
+	 */
+	public OAuth2TokenType(String value) {
 		Assert.hasText(value, "value cannot be empty");
 		this.value = value;
 	}
 
+	/**
+	 * Returns the value of the token type.
+	 *
+	 * @return the value of the token type
+	 */
 	public String getValue() {
 		return this.value;
 	}
@@ -46,12 +59,12 @@ public final class TokenType implements Serializable {
 		if (obj == null || this.getClass() != obj.getClass()) {
 			return false;
 		}
-		TokenType that = (TokenType) obj;
-		return this.getValue().equals(that.getValue());
+		OAuth2TokenType that = (OAuth2TokenType) obj;
+		return getValue().equals(that.getValue());
 	}
 
 	@Override
 	public int hashCode() {
-		return this.getValue().hashCode();
+		return getValue().hashCode();
 	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/Version.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.server.authorization;
+package org.springframework.security.oauth2.core;
 
 /**
  * Internal class used for serialization across Spring Security Authorization Server classes.
@@ -23,8 +23,8 @@ package org.springframework.security.oauth2.server.authorization;
  */
 public final class Version {
 	private static final int MAJOR = 0;
-	private static final int MINOR = 0;
-	private static final int PATCH = 2;
+	private static final int MINOR = 2;
+	private static final int PATCH = 0;
 
 	/**
 	 * Global Serialization value for Spring Security Authorization Server classes.

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/authentication/OAuth2AuthenticationContext.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.authentication;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.lang.Nullable;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.oauth2.core.context.Context;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+
+/**
+ * A context that holds an {@link Authentication} and (optionally) additional information
+ * and is used by an {@link OAuth2AuthenticationValidator} when attempting to validate the {@link Authentication}.
+ *
+ * @author Joe Grandja
+ * @since 0.2.0
+ * @see Context
+ * @see OAuth2AuthenticationValidator
+ */
+public final class OAuth2AuthenticationContext implements Context {
+	private final Map<Object, Object> context;
+
+	/**
+	 * Constructs an {@code OAuth2AuthenticationContext} using the provided parameters.
+	 *
+	 * @param authentication the {@code Authentication}
+	 * @param context a {@code Map} of additional context information
+	 */
+	public OAuth2AuthenticationContext(Authentication authentication, @Nullable Map<Object, Object> context) {
+		Assert.notNull(authentication, "authentication cannot be null");
+		this.context = new HashMap<>();
+		if (!CollectionUtils.isEmpty(context)) {
+			this.context.putAll(context);
+		}
+		this.context.put(Authentication.class, authentication);
+	}
+
+	/**
+	 * Returns the {@link Authentication} associated to the authentication context.
+	 *
+	 * @param <T> the type of the {@code Authentication}
+	 * @return the {@link Authentication}
+	 */
+	@SuppressWarnings("unchecked")
+	public <T extends Authentication> T getAuthentication() {
+		return (T) get(Authentication.class);
+	}
+
+	@SuppressWarnings("unchecked")
+	@Override
+	public <V> V get(Object key) {
+		return (V) this.context.get(key);
+	}
+
+	@Override
+	public boolean hasKey(Object key) {
+		return this.context.containsKey(key);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/authentication/OAuth2AuthenticationValidator.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.authentication;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.oauth2.core.OAuth2AuthenticationException;
+
+/**
+ * Implementations of this interface are responsible for validating the attribute(s)
+ * of the {@link Authentication} associated to the {@link OAuth2AuthenticationContext}.
+ *
+ * @author Joe Grandja
+ * @since 0.2.0
+ * @see OAuth2AuthenticationContext
+ */
+@FunctionalInterface
+public interface OAuth2AuthenticationValidator {
+
+	/**
+	 * Validate the attribute(s) of the {@link Authentication}.
+	 *
+	 * @param authenticationContext the authentication context
+	 * @throws OAuth2AuthenticationException if the attribute(s) of the {@code Authentication} is invalid
+	 */
+	void validate(OAuth2AuthenticationContext authenticationContext) throws OAuth2AuthenticationException;
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/context/Context.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.context;
+
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * A facility for holding information associated to a specific context.
+ *
+ * @author Joe Grandja
+ * @since 0.1.0
+ */
+public interface Context {
+
+	/**
+	 * Returns the value of the attribute associated to the key.
+	 *
+	 * @param key the key for the attribute
+	 * @param <V> the type of the value for the attribute
+	 * @return the value of the attribute associated to the key, or {@code null} if not available
+	 */
+	@Nullable
+	<V> V get(Object key);
+
+	/**
+	 * Returns the value of the attribute associated to the key.
+	 *
+	 * @param key the key for the attribute
+	 * @param <V> the type of the value for the attribute
+	 * @return the value of the attribute associated to the key, or {@code null} if not available or not of the specified type
+	 */
+	@Nullable
+	default <V> V get(Class<V> key) {
+		Assert.notNull(key, "key cannot be null");
+		V value = get((Object) key);
+		return key.isInstance(value) ? value : null;
+	}
+
+	/**
+	 * Returns {@code true} if an attribute associated to the key exists, {@code false} otherwise.
+	 *
+	 * @param key the key for the attribute
+	 * @return {@code true} if an attribute associated to the key exists, {@code false} otherwise
+	 */
+	boolean hasKey(Object key);
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/http/converter/OAuth2AuthorizationServerMetadataHttpMessageConverter.java

@@ -0,0 +1,164 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.http.converter;
+
+import java.net.URL;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.convert.TypeDescriptor;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.AbstractHttpMessageConverter;
+import org.springframework.http.converter.GenericHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.security.oauth2.core.OAuth2AuthorizationServerMetadata;
+import org.springframework.security.oauth2.core.OAuth2AuthorizationServerMetadataClaimNames;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.security.oauth2.core.converter.ClaimTypeConverter;
+import org.springframework.util.Assert;
+
+/**
+ * A {@link HttpMessageConverter} for an {@link OAuth2AuthorizationServerMetadata OAuth 2.0 Authorization Server Metadata Response}.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.1
+ * @see AbstractHttpMessageConverter
+ * @see OAuth2AuthorizationServerMetadata
+ */
+public class OAuth2AuthorizationServerMetadataHttpMessageConverter
+		extends AbstractHttpMessageConverter<OAuth2AuthorizationServerMetadata> {
+
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP =
+			new ParameterizedTypeReference<Map<String, Object>>() {};
+
+	private final GenericHttpMessageConverter<Object> jsonMessageConverter = HttpMessageConverters.getJsonMessageConverter();
+
+	private Converter<Map<String, Object>, OAuth2AuthorizationServerMetadata> authorizationServerMetadataConverter = new OAuth2AuthorizationServerMetadataConverter();
+	private Converter<OAuth2AuthorizationServerMetadata, Map<String, Object>> authorizationServerMetadataParametersConverter = OAuth2AuthorizationServerMetadata::getClaims;
+
+	public OAuth2AuthorizationServerMetadataHttpMessageConverter() {
+		super(MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
+	}
+
+	@Override
+	protected boolean supports(Class<?> clazz) {
+		return OAuth2AuthorizationServerMetadata.class.isAssignableFrom(clazz);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	protected OAuth2AuthorizationServerMetadata readInternal(Class<? extends OAuth2AuthorizationServerMetadata> clazz, HttpInputMessage inputMessage)
+			throws HttpMessageNotReadableException {
+		try {
+			Map<String, Object> authorizationServerMetadataParameters =
+					(Map<String, Object>) this.jsonMessageConverter.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
+			return this.authorizationServerMetadataConverter.convert(authorizationServerMetadataParameters);
+		} catch (Exception ex) {
+			throw new HttpMessageNotReadableException(
+					"An error occurred reading the OAuth 2.0 Authorization Server Metadata: " + ex.getMessage(), ex, inputMessage);
+		}
+	}
+
+	@Override
+	protected void writeInternal(OAuth2AuthorizationServerMetadata authorizationServerMetadata, HttpOutputMessage outputMessage)
+			throws HttpMessageNotWritableException {
+		try {
+			Map<String, Object> authorizationServerMetadataResponseParameters =
+					this.authorizationServerMetadataParametersConverter.convert(authorizationServerMetadata);
+			this.jsonMessageConverter.write(
+					authorizationServerMetadataResponseParameters,
+					STRING_OBJECT_MAP.getType(),
+					MediaType.APPLICATION_JSON,
+					outputMessage
+			);
+		} catch (Exception ex) {
+			throw new HttpMessageNotWritableException(
+					"An error occurred writing the OAuth 2.0 Authorization Server Metadata: " + ex.getMessage(), ex);
+		}
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the OAuth 2.0 Authorization Server Metadata
+	 * parameters to an {@link OAuth2AuthorizationServerMetadata}.
+	 *
+	 * @param authorizationServerMetadataConverter the {@link Converter} used for converting to
+	 * an {@link OAuth2AuthorizationServerMetadata}.
+	 */
+	public final void setAuthorizationServerMetadataConverter(Converter<Map<String, Object>, OAuth2AuthorizationServerMetadata> authorizationServerMetadataConverter) {
+		Assert.notNull(authorizationServerMetadataConverter, "authorizationServerMetadataConverter cannot be null");
+		this.authorizationServerMetadataConverter = authorizationServerMetadataConverter;
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the {@link OAuth2AuthorizationServerMetadata} to a
+	 * {@code Map} representation of the OAuth 2.0 Authorization Server Metadata.
+	 *
+	 * @param authorizationServerMetadataParametersConverter the {@link Converter} used for converting to a
+	 * {@code Map} representation of the OAuth 2.0 Authorization Server Metadata.
+	 */
+	public final void setAuthorizationServerMetadataParametersConverter(Converter<OAuth2AuthorizationServerMetadata, Map<String, Object>> authorizationServerMetadataParametersConverter) {
+		Assert.notNull(authorizationServerMetadataParametersConverter, "authorizationServerMetadataParametersConverter cannot be null");
+		this.authorizationServerMetadataParametersConverter = authorizationServerMetadataParametersConverter;
+	}
+
+	private static final class OAuth2AuthorizationServerMetadataConverter implements Converter<Map<String, Object>, OAuth2AuthorizationServerMetadata> {
+		private static final ClaimConversionService CLAIM_CONVERSION_SERVICE = ClaimConversionService.getSharedInstance();
+		private static final TypeDescriptor OBJECT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Object.class);
+		private static final TypeDescriptor STRING_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(String.class);
+		private static final TypeDescriptor URL_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(URL.class);
+		private final ClaimTypeConverter claimTypeConverter;
+
+		private OAuth2AuthorizationServerMetadataConverter() {
+			Converter<Object, ?> collectionStringConverter = getConverter(
+					TypeDescriptor.collection(Collection.class, STRING_TYPE_DESCRIPTOR));
+			Converter<Object, ?> urlConverter = getConverter(URL_TYPE_DESCRIPTOR);
+
+			Map<String, Converter<Object, ?>> claimConverters = new HashMap<>();
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.ISSUER, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.AUTHORIZATION_ENDPOINT, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.JWKS_URI, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.SCOPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.RESPONSE_TYPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.GRANT_TYPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.REVOCATION_ENDPOINT_AUTH_METHODS_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT, urlConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.INTROSPECTION_ENDPOINT_AUTH_METHODS_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OAuth2AuthorizationServerMetadataClaimNames.CODE_CHALLENGE_METHODS_SUPPORTED, collectionStringConverter);
+			this.claimTypeConverter = new ClaimTypeConverter(claimConverters);
+		}
+
+		@Override
+		public OAuth2AuthorizationServerMetadata convert(Map<String, Object> source) {
+			Map<String, Object> parsedClaims = this.claimTypeConverter.convert(source);
+			return OAuth2AuthorizationServerMetadata.withClaims(parsedClaims).build();
+		}
+
+		private static Converter<Object, ?> getConverter(TypeDescriptor targetDescriptor) {
+			return (source) -> CLAIM_CONVERSION_SERVICE.convert(source, OBJECT_TYPE_DESCRIPTOR, targetDescriptor);
+		}
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/http/converter/OAuth2TokenIntrospectionHttpMessageConverter.java

@@ -0,0 +1,203 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.security.oauth2.core.http.converter;
+
+import java.net.URL;
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.convert.TypeDescriptor;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.AbstractHttpMessageConverter;
+import org.springframework.http.converter.GenericHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.security.oauth2.core.OAuth2TokenIntrospection;
+import org.springframework.security.oauth2.core.OAuth2TokenIntrospectionClaimNames;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.security.oauth2.core.converter.ClaimTypeConverter;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * A {@link HttpMessageConverter} for an {@link OAuth2TokenIntrospection OAuth 2.0 Token Introspection Response}.
+ *
+ * @author Gerardo Roza
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see AbstractHttpMessageConverter
+ * @see OAuth2TokenIntrospection
+ */
+public class OAuth2TokenIntrospectionHttpMessageConverter extends AbstractHttpMessageConverter<OAuth2TokenIntrospection> {
+
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP = new ParameterizedTypeReference<Map<String, Object>>() {
+	};
+
+	private final GenericHttpMessageConverter<Object> jsonMessageConverter = HttpMessageConverters.getJsonMessageConverter();
+
+	private Converter<Map<String, Object>, OAuth2TokenIntrospection> tokenIntrospectionConverter = new MapOAuth2TokenIntrospectionConverter();
+	private Converter<OAuth2TokenIntrospection, Map<String, Object>> tokenIntrospectionParametersConverter = new OAuth2TokenIntrospectionMapConverter();
+
+	public OAuth2TokenIntrospectionHttpMessageConverter() {
+		super(MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
+	}
+
+	@Override
+	protected boolean supports(Class<?> clazz) {
+		return OAuth2TokenIntrospection.class.isAssignableFrom(clazz);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	protected OAuth2TokenIntrospection readInternal(Class<? extends OAuth2TokenIntrospection> clazz, HttpInputMessage inputMessage)
+			throws HttpMessageNotReadableException {
+		try {
+			Map<String, Object> tokenIntrospectionParameters = (Map<String, Object>) this.jsonMessageConverter
+					.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
+			return this.tokenIntrospectionConverter.convert(tokenIntrospectionParameters);
+		} catch (Exception ex) {
+			throw new HttpMessageNotReadableException(
+					"An error occurred reading the Token Introspection Response: " + ex.getMessage(), ex, inputMessage);
+		}
+	}
+
+	@Override
+	protected void writeInternal(OAuth2TokenIntrospection tokenIntrospection, HttpOutputMessage outputMessage)
+			throws HttpMessageNotWritableException {
+		try {
+			Map<String, Object> tokenIntrospectionResponseParameters = this.tokenIntrospectionParametersConverter
+					.convert(tokenIntrospection);
+			this.jsonMessageConverter.write(tokenIntrospectionResponseParameters, STRING_OBJECT_MAP.getType(),
+					MediaType.APPLICATION_JSON, outputMessage);
+		} catch (Exception ex) {
+			throw new HttpMessageNotWritableException(
+					"An error occurred writing the Token Introspection Response: " + ex.getMessage(), ex);
+		}
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the Token Introspection Response parameters to an {@link OAuth2TokenIntrospection}.
+	 *
+	 * @param tokenIntrospectionConverter the {@link Converter} used for converting to an {@link OAuth2TokenIntrospection}
+	 */
+	public final void setTokenIntrospectionConverter(
+			Converter<Map<String, Object>, OAuth2TokenIntrospection> tokenIntrospectionConverter) {
+		Assert.notNull(tokenIntrospectionConverter, "tokenIntrospectionConverter cannot be null");
+		this.tokenIntrospectionConverter = tokenIntrospectionConverter;
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting an {@link OAuth2TokenIntrospection}
+	 * to a {@code Map} representation of the Token Introspection Response parameters.
+	 *
+	 * @param tokenIntrospectionParametersConverter the {@link Converter} used for converting to a
+	 * {@code Map} representation of the Token Introspection Response parameters
+	 */
+	public final void setTokenIntrospectionParametersConverter(
+			Converter<OAuth2TokenIntrospection, Map<String, Object>> tokenIntrospectionParametersConverter) {
+		Assert.notNull(tokenIntrospectionParametersConverter, "tokenIntrospectionParametersConverter cannot be null");
+		this.tokenIntrospectionParametersConverter = tokenIntrospectionParametersConverter;
+	}
+
+	private static final class MapOAuth2TokenIntrospectionConverter
+			implements Converter<Map<String, Object>, OAuth2TokenIntrospection> {
+
+		private static final ClaimConversionService CLAIM_CONVERSION_SERVICE = ClaimConversionService.getSharedInstance();
+		private static final TypeDescriptor OBJECT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Object.class);
+		private static final TypeDescriptor BOOLEAN_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Boolean.class);
+		private static final TypeDescriptor STRING_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(String.class);
+		private static final TypeDescriptor INSTANT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Instant.class);
+		private static final TypeDescriptor URL_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(URL.class);
+		private final ClaimTypeConverter claimTypeConverter;
+
+		private MapOAuth2TokenIntrospectionConverter() {
+			Converter<Object, ?> booleanConverter = getConverter(BOOLEAN_TYPE_DESCRIPTOR);
+			Converter<Object, ?> stringConverter = getConverter(STRING_TYPE_DESCRIPTOR);
+			Converter<Object, ?> instantConverter = getConverter(INSTANT_TYPE_DESCRIPTOR);
+			Converter<Object, ?> collectionStringConverter = getConverter(
+					TypeDescriptor.collection(Collection.class, STRING_TYPE_DESCRIPTOR));
+			Converter<Object, ?> urlConverter = getConverter(URL_TYPE_DESCRIPTOR);
+
+			Map<String, Converter<Object, ?>> claimConverters = new HashMap<>();
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.ACTIVE, booleanConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.SCOPE, MapOAuth2TokenIntrospectionConverter::convertScope);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.CLIENT_ID, stringConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.USERNAME, stringConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.TOKEN_TYPE, stringConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.EXP, instantConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.IAT, instantConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.NBF, instantConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.SUB, stringConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.AUD, collectionStringConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.ISS, urlConverter);
+			claimConverters.put(OAuth2TokenIntrospectionClaimNames.JTI, stringConverter);
+			this.claimTypeConverter = new ClaimTypeConverter(claimConverters);
+		}
+
+		@Override
+		public OAuth2TokenIntrospection convert(Map<String, Object> source) {
+			Map<String, Object> parsedClaims = this.claimTypeConverter.convert(source);
+			return OAuth2TokenIntrospection.withClaims(parsedClaims).build();
+		}
+
+		private static Converter<Object, ?> getConverter(TypeDescriptor targetDescriptor) {
+			return (source) -> CLAIM_CONVERSION_SERVICE.convert(source, OBJECT_TYPE_DESCRIPTOR, targetDescriptor);
+		}
+
+		private static List<String> convertScope(Object scope) {
+			if (scope == null) {
+				return Collections.emptyList();
+			}
+			return Arrays.asList(StringUtils.delimitedListToStringArray(scope.toString(), " "));
+		}
+	}
+
+	private static final class OAuth2TokenIntrospectionMapConverter
+			implements Converter<OAuth2TokenIntrospection, Map<String, Object>> {
+
+		@Override
+		public Map<String, Object> convert(OAuth2TokenIntrospection source) {
+			Map<String, Object> responseClaims = new LinkedHashMap<>(source.getClaims());
+			if (!CollectionUtils.isEmpty(source.getScopes())) {
+				responseClaims.put(OAuth2TokenIntrospectionClaimNames.SCOPE, StringUtils.collectionToDelimitedString(source.getScopes(), " "));
+			}
+			if (source.getExpiresAt() != null) {
+				responseClaims.put(OAuth2TokenIntrospectionClaimNames.EXP, source.getExpiresAt().getEpochSecond());
+			}
+			if (source.getIssuedAt() != null) {
+				responseClaims.put(OAuth2TokenIntrospectionClaimNames.IAT, source.getIssuedAt().getEpochSecond());
+			}
+			if (source.getNotBefore() != null) {
+				responseClaims.put(OAuth2TokenIntrospectionClaimNames.NBF, source.getNotBefore().getEpochSecond());
+			}
+			return responseClaims;
+		}
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientMetadataClaimAccessor.java

@@ -0,0 +1,137 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+import java.time.Instant;
+import java.util.List;
+
+import org.springframework.security.oauth2.core.ClaimAccessor;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+
+/**
+ * A {@link ClaimAccessor} for the "claims" that are contained
+ * in the OpenID Client Registration Request and Response.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see ClaimAccessor
+ * @see OidcClientMetadataClaimNames
+ * @see OidcClientRegistration
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientMetadata">2. Client Metadata</a>
+ */
+public interface OidcClientMetadataClaimAccessor extends ClaimAccessor {
+
+	/**
+	 * Returns the Client Identifier {@code (client_id)}.
+	 *
+	 * @return the Client Identifier
+	 */
+	default String getClientId() {
+		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_ID);
+	}
+
+	/**
+	 * Returns the time at which the Client Identifier was issued {@code (client_id_issued_at)}.
+	 *
+	 * @return the time at which the Client Identifier was issued
+	 */
+	default Instant getClientIdIssuedAt() {
+		return getClaimAsInstant(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT);
+	}
+
+	/**
+	 * Returns the Client Secret {@code (client_secret)}.
+	 *
+	 * @return the Client Secret
+	 */
+	default String getClientSecret() {
+		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_SECRET);
+	}
+
+	/**
+	 * Returns the time at which the {@code client_secret} will expire {@code (client_secret_expires_at)}.
+	 *
+	 * @return the time at which the {@code client_secret} will expire
+	 */
+	default Instant getClientSecretExpiresAt() {
+		return getClaimAsInstant(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
+	}
+
+	/**
+	 * Returns the name of the Client to be presented to the End-User {@code (client_name)}.
+	 *
+	 * @return the name of the Client to be presented to the End-User
+	 */
+	default String getClientName() {
+		return getClaimAsString(OidcClientMetadataClaimNames.CLIENT_NAME);
+	}
+
+	/**
+	 * Returns the redirection {@code URI} values used by the Client {@code (redirect_uris)}.
+	 *
+	 * @return the redirection {@code URI} values used by the Client
+	 */
+	default List<String> getRedirectUris() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.REDIRECT_URIS);
+	}
+
+	/**
+	 * Returns the authentication method used by the Client for the Token Endpoint {@code (token_endpoint_auth_method)}.
+	 *
+	 * @return the authentication method used by the Client for the Token Endpoint
+	 */
+	default String getTokenEndpointAuthenticationMethod() {
+		return getClaimAsString(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using {@code (grant_types)}.
+	 *
+	 * @return the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
+	 */
+	default List<String> getGrantTypes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.GRANT_TYPES);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using {@code (response_types)}.
+	 *
+	 * @return the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+	 */
+	default List<String> getResponseTypes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.RESPONSE_TYPES);
+	}
+
+	/**
+	 * Returns the OAuth 2.0 {@code scope} values that the Client will restrict itself to using {@code (scope)}.
+	 *
+	 * @return the OAuth 2.0 {@code scope} values that the Client will restrict itself to using
+	 */
+	default List<String> getScopes() {
+		return getClaimAsStringList(OidcClientMetadataClaimNames.SCOPE);
+	}
+
+	/**
+	 * Returns the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client {@code (id_token_signed_response_alg)}.
+	 *
+	 * @return the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
+	 */
+	default String getIdTokenSignedResponseAlgorithm() {
+		return getClaimAsString(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientMetadataClaimNames.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
+
+/**
+ * The names of the "claims" defined by OpenID Connect Dynamic Client Registration 1.0
+ * that are contained in the OpenID Client Registration Request and Response.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-registration-1_0.html#ClientMetadata">2. Client Metadata</a>
+ */
+public interface OidcClientMetadataClaimNames {
+
+	/**
+	 * {@code client_id} - the Client Identifier
+	 */
+	String CLIENT_ID = "client_id";
+
+	/**
+	 * {@code client_id_issued_at} - the time at which the Client Identifier was issued
+	 */
+	String CLIENT_ID_ISSUED_AT = "client_id_issued_at";
+
+	/**
+	 * {@code client_secret} - the Client Secret
+	 */
+	String CLIENT_SECRET = "client_secret";
+
+	/**
+	 * {@code client_secret_expires_at} - the time at which the {@code client_secret} will expire or 0 if it will not expire
+	 */
+	String CLIENT_SECRET_EXPIRES_AT = "client_secret_expires_at";
+
+	/**
+	 * {@code client_name} - the name of the Client to be presented to the End-User
+	 */
+	String CLIENT_NAME = "client_name";
+
+	/**
+	 * {@code redirect_uris} - the redirection {@code URI} values used by the Client
+	 */
+	String REDIRECT_URIS = "redirect_uris";
+
+	/**
+	 * {@code token_endpoint_auth_method} - the authentication method used by the Client for the Token Endpoint
+	 */
+	String TOKEN_ENDPOINT_AUTH_METHOD = "token_endpoint_auth_method";
+
+	/**
+	 * {@code grant_types} - the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
+	 */
+	String GRANT_TYPES = "grant_types";
+
+	/**
+	 * {@code response_types} - the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+	 */
+	String RESPONSE_TYPES = "response_types";
+
+	/**
+	 * {@code scope} - a space-separated list of OAuth 2.0 {@code scope} values that the Client will restrict itself to using
+	 */
+	String SCOPE = "scope";
+
+	/**
+	 * {@code id_token_signed_response_alg} - the {@link JwsAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
+	 */
+	String ID_TOKEN_SIGNED_RESPONSE_ALG = "id_token_signed_response_alg";
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcClientRegistration.java

@@ -0,0 +1,340 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+import java.io.Serializable;
+import java.time.Instant;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import org.springframework.security.oauth2.core.Version;
+import org.springframework.security.oauth2.jose.jws.SignatureAlgorithm;
+import org.springframework.util.Assert;
+
+/**
+ * A representation of an OpenID Client Registration Request and Response,
+ * which is sent to and returned from the Client Registration Endpoint,
+ * and contains a set of claims about the Client's Registration information.
+ * The claims are defined by the OpenID Connect Dynamic Client Registration 1.0 specification.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see OidcClientMetadataClaimAccessor
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#RegistrationRequest">3.1. Client Registration Request</a>
+ * @see <a href="https://openid.net/specs/openid-connect-registration-1_0.html#RegistrationResponse">3.2. Client Registration Response</a>
+ */
+public final class OidcClientRegistration implements OidcClientMetadataClaimAccessor, Serializable {
+	private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
+	private final Map<String, Object> claims;
+
+	private OidcClientRegistration(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		this.claims = Collections.unmodifiableMap(new LinkedHashMap<>(claims));
+	}
+
+	/**
+	 * Returns the metadata as claims.
+	 *
+	 * @return a {@code Map} of the metadata as claims
+	 */
+	@Override
+	public Map<String, Object> getClaims() {
+		return this.claims;
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with empty claims.
+	 *
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with the provided claims.
+	 *
+	 * @param claims the claims to initialize the builder
+	 */
+	public static Builder withClaims(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		return new Builder()
+				.claims(c -> c.putAll(claims));
+	}
+
+	/**
+	 * Helps configure an {@link OidcClientRegistration}.
+	 */
+	public static class Builder {
+		private final Map<String, Object> claims = new LinkedHashMap<>();
+
+		private Builder() {
+		}
+
+		/**
+		 * Sets the Client Identifier, REQUIRED.
+		 *
+		 * @param clientId the Client Identifier
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientId(String clientId) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_ID, clientId);
+		}
+
+		/**
+		 * Sets the time at which the Client Identifier was issued, OPTIONAL.
+		 *
+		 * @param clientIdIssuedAt the time at which the Client Identifier was issued
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientIdIssuedAt(Instant clientIdIssuedAt) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, clientIdIssuedAt);
+		}
+
+		/**
+		 * Sets the Client Secret, OPTIONAL.
+		 *
+		 * @param clientSecret the Client Secret
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientSecret(String clientSecret) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET, clientSecret);
+		}
+
+		/**
+		 * Sets the time at which the {@code client_secret} will expire or {@code null} if it will not expire, REQUIRED if {@code client_secret} was issued.
+		 *
+		 * @param clientSecretExpiresAt the time at which the {@code client_secret} will expire or {@code null} if it will not expire
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientSecretExpiresAt(Instant clientSecretExpiresAt) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
+		}
+
+		/**
+		 * Sets the name of the Client to be presented to the End-User, OPTIONAL.
+		 *
+		 * @param clientName the name of the Client to be presented to the End-User
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder clientName(String clientName) {
+			return claim(OidcClientMetadataClaimNames.CLIENT_NAME, clientName);
+		}
+
+		/**
+		 * Add the redirection {@code URI} used by the Client, REQUIRED.
+		 *
+		 * @param redirectUri the redirection {@code URI} used by the Client
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder redirectUri(String redirectUri) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.REDIRECT_URIS, redirectUri);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the redirection {@code URI} values used by the Client,
+		 * allowing the ability to add, replace, or remove, REQUIRED.
+		 *
+		 * @param redirectUrisConsumer a {@code Consumer} of the redirection {@code URI} values used by the Client
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder redirectUris(Consumer<List<String>> redirectUrisConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.REDIRECT_URIS, redirectUrisConsumer);
+			return this;
+		}
+
+		/**
+		 * Sets the authentication method used by the Client for the Token Endpoint, OPTIONAL.
+		 *
+		 * @param tokenEndpointAuthenticationMethod the authentication method used by the Client for the Token Endpoint
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder tokenEndpointAuthenticationMethod(String tokenEndpointAuthenticationMethod) {
+			return claim(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, tokenEndpointAuthenticationMethod);
+		}
+
+		/**
+		 * Add the OAuth 2.0 {@code grant_type} that the Client will restrict itself to using, OPTIONAL.
+		 *
+		 * @param grantType the OAuth 2.0 {@code grant_type} that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder grantType(String grantType) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.GRANT_TYPES, grantType);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param grantTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code grant_type} values that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder grantTypes(Consumer<List<String>> grantTypesConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.GRANT_TYPES, grantTypesConsumer);
+			return this;
+		}
+
+		/**
+		 * Add the OAuth 2.0 {@code response_type} that the Client will restrict itself to using, OPTIONAL.
+		 *
+		 * @param responseType the OAuth 2.0 {@code response_type} that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder responseType(String responseType) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseType);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param responseTypesConsumer a {@code Consumer} of the OAuth 2.0 {@code response_type} values that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder responseTypes(Consumer<List<String>>  responseTypesConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.RESPONSE_TYPES, responseTypesConsumer);
+			return this;
+		}
+
+		/**
+		 * Add the OAuth 2.0 {@code scope} that the Client will restrict itself to using, OPTIONAL.
+		 *
+		 * @param scope the OAuth 2.0 {@code scope} that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder scope(String scope) {
+			addClaimToClaimList(OidcClientMetadataClaimNames.SCOPE, scope);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the OAuth 2.0 {@code scope} values that the Client will restrict itself to using,
+		 * allowing the ability to add, replace, or remove, OPTIONAL.
+		 *
+		 * @param scopesConsumer a {@code Consumer} of the OAuth 2.0 {@code scope} values that the Client will restrict itself to using
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder scopes(Consumer<List<String>>  scopesConsumer) {
+			acceptClaimValues(OidcClientMetadataClaimNames.SCOPE, scopesConsumer);
+			return this;
+		}
+
+		/**
+		 * Sets the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client, OPTIONAL.
+		 *
+		 * @param idTokenSignedResponseAlgorithm the {@link SignatureAlgorithm JWS} algorithm required for signing the {@link OidcIdToken ID Token} issued to the Client
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder idTokenSignedResponseAlgorithm(String idTokenSignedResponseAlgorithm) {
+			return claim(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG, idTokenSignedResponseAlgorithm);
+		}
+
+		/**
+		 * Sets the claim.
+		 *
+		 * @param name  the claim name
+		 * @param value the claim value
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder claim(String name, Object value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			this.claims.put(name, value);
+			return this;
+		}
+
+		/**
+		 * Provides access to every {@link #claim(String, Object)} declared so far
+		 * allowing the ability to add, replace, or remove.
+		 *
+		 * @param claimsConsumer a {@code Consumer} of the claims
+		 * @return the {@link Builder} for further configurations
+		 */
+		public Builder claims(Consumer<Map<String, Object>> claimsConsumer) {
+			claimsConsumer.accept(this.claims);
+			return this;
+		}
+
+		/**
+		 * Validate the claims and build the {@link OidcClientRegistration}.
+		 * <p>
+		 * The following claims are REQUIRED:
+		 * {@code client_id}, {@code redirect_uris}.
+		 *
+		 * @return the {@link OidcClientRegistration}
+		 */
+		public OidcClientRegistration build() {
+			validate();
+			return new OidcClientRegistration(this.claims);
+		}
+
+		private void validate() {
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT) != null ||
+					this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET) != null) {
+				Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID), "client_id cannot be null");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT) != null) {
+				Assert.isInstanceOf(Instant.class, this.claims.get(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT), "client_id_issued_at must be of type Instant");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT) != null) {
+				Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET), "client_secret cannot be null");
+				Assert.isInstanceOf(Instant.class, this.claims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT), "client_secret_expires_at must be of type Instant");
+			}
+			Assert.notNull(this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris cannot be null");
+			Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris must be of type List");
+			Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.REDIRECT_URIS), "redirect_uris cannot be empty");
+			if (this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES), "grant_types must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.GRANT_TYPES), "grant_types cannot be empty");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES), "response_types must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.RESPONSE_TYPES), "response_types cannot be empty");
+			}
+			if (this.claims.get(OidcClientMetadataClaimNames.SCOPE) != null) {
+				Assert.isInstanceOf(List.class, this.claims.get(OidcClientMetadataClaimNames.SCOPE), "scope must be of type List");
+				Assert.notEmpty((List<?>) this.claims.get(OidcClientMetadataClaimNames.SCOPE), "scope cannot be empty");
+			}
+		}
+
+		@SuppressWarnings("unchecked")
+		private void addClaimToClaimList(String name, String value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			this.claims.computeIfAbsent(name, k -> new LinkedList<String>());
+			((List<String>) this.claims.get(name)).add(value);
+		}
+
+		@SuppressWarnings("unchecked")
+		private void acceptClaimValues(String name, Consumer<List<String>> valuesConsumer) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(valuesConsumer, "valuesConsumer cannot be null");
+			this.claims.computeIfAbsent(name, k -> new LinkedList<String>());
+			List<String> values = (List<String>) this.claims.get(name);
+			valuesConsumer.accept(values);
+		}
+
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcProviderConfiguration.java

@@ -0,0 +1,167 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import org.springframework.security.oauth2.core.AbstractOAuth2AuthorizationServerMetadata;
+import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
+import org.springframework.util.Assert;
+
+/**
+ * A representation of an OpenID Provider Configuration Response,
+ * which is returned from an Issuer's Discovery Endpoint,
+ * and contains a set of claims about the OpenID Provider's configuration.
+ * The claims are defined by the OpenID Connect Discovery 1.0 specification.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.0
+ * @see AbstractOAuth2AuthorizationServerMetadata
+ * @see OidcProviderMetadataClaimAccessor
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderConfigurationResponse">4.2. OpenID Provider Configuration Response</a>
+ */
+public final class OidcProviderConfiguration extends AbstractOAuth2AuthorizationServerMetadata
+		implements OidcProviderMetadataClaimAccessor {
+
+	private OidcProviderConfiguration(Map<String, Object> claims) {
+		super(claims);
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with empty claims.
+	 *
+	 * @return the {@link Builder}
+	 */
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Constructs a new {@link Builder} with the provided claims.
+	 *
+	 * @param claims the claims to initialize the builder
+	 */
+	public static Builder withClaims(Map<String, Object> claims) {
+		Assert.notEmpty(claims, "claims cannot be empty");
+		return new Builder()
+				.claims(c -> c.putAll(claims));
+	}
+
+	/**
+	 * Helps configure an {@link OidcProviderConfiguration}.
+	 */
+	public static class Builder extends AbstractBuilder<OidcProviderConfiguration, Builder> {
+
+		private Builder() {
+		}
+
+		/**
+		 * Add this Subject Type to the collection of {@code subject_types_supported} in the resulting
+		 * {@link OidcProviderConfiguration}, REQUIRED.
+		 *
+		 * @param subjectType the Subject Type that the OpenID Provider supports
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder subjectType(String subjectType) {
+			addClaimToClaimList(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED, subjectType);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the Subject Types(s) allowing the ability to add, replace, or remove.
+		 *
+		 * @param subjectTypesConsumer a {@code Consumer} of the Subject Types(s)
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder subjectTypes(Consumer<List<String>> subjectTypesConsumer) {
+			acceptClaimValues(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED, subjectTypesConsumer);
+			return this;
+		}
+
+		/**
+		 * Add this {@link JwsAlgorithm JWS} signing algorithm to the collection of {@code id_token_signing_alg_values_supported}
+		 * in the resulting {@link OidcProviderConfiguration}, REQUIRED.
+		 *
+		 * @param signingAlgorithm the {@link JwsAlgorithm JWS} signing algorithm supported for the {@link OidcIdToken ID Token}
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder idTokenSigningAlgorithm(String signingAlgorithm) {
+			addClaimToClaimList(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED, signingAlgorithm);
+			return this;
+		}
+
+		/**
+		 * A {@code Consumer} of the {@link JwsAlgorithm JWS} signing algorithms for the {@link OidcIdToken ID Token}
+		 * allowing the ability to add, replace, or remove.
+		 *
+		 * @param signingAlgorithmsConsumer a {@code Consumer} of the {@link JwsAlgorithm JWS} signing algorithms for the {@link OidcIdToken ID Token}
+		 * @return the {@link Builder} for further configuration
+		 */
+		public Builder idTokenSigningAlgorithms(Consumer<List<String>> signingAlgorithmsConsumer) {
+			acceptClaimValues(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED, signingAlgorithmsConsumer);
+			return this;
+		}
+
+		/**
+		 * Validate the claims and build the {@link OidcProviderConfiguration}.
+		 * <p>
+		 * The following claims are REQUIRED:
+		 * {@code issuer}, {@code authorization_endpoint}, {@code token_endpoint}, {@code jwks_uri},
+		 * {@code response_types_supported}, {@code subject_types_supported} and
+		 * {@code id_token_signing_alg_values_supported}.
+		 *
+		 * @return the {@link OidcProviderConfiguration}
+		 */
+		@Override
+		public OidcProviderConfiguration build() {
+			validate();
+			return new OidcProviderConfiguration(getClaims());
+		}
+
+		@Override
+		protected void validate() {
+			super.validate();
+			Assert.notNull(getClaims().get(OidcProviderMetadataClaimNames.JWKS_URI), "jwksUri cannot be null");
+			Assert.notNull(getClaims().get(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED), "subjectTypes cannot be null");
+			Assert.isInstanceOf(List.class, getClaims().get(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED), "subjectTypes must be of type List");
+			Assert.notEmpty((List<?>) getClaims().get(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED), "subjectTypes cannot be empty");
+			Assert.notNull(getClaims().get(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED), "idTokenSigningAlgorithms cannot be null");
+			Assert.isInstanceOf(List.class, getClaims().get(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED), "idTokenSigningAlgorithms must be of type List");
+			Assert.notEmpty((List<?>) getClaims().get(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED), "idTokenSigningAlgorithms cannot be empty");
+		}
+
+		@SuppressWarnings("unchecked")
+		private void addClaimToClaimList(String name, String value) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(value, "value cannot be null");
+			getClaims().computeIfAbsent(name, k -> new LinkedList<String>());
+			((List<String>) getClaims().get(name)).add(value);
+		}
+
+		@SuppressWarnings("unchecked")
+		private void acceptClaimValues(String name, Consumer<List<String>> valuesConsumer) {
+			Assert.hasText(name, "name cannot be empty");
+			Assert.notNull(valuesConsumer, "valuesConsumer cannot be null");
+			getClaims().computeIfAbsent(name, k -> new LinkedList<String>());
+			List<String> values = (List<String>) getClaims().get(name);
+			valuesConsumer.accept(values);
+		}
+
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcProviderMetadataClaimAccessor.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+
+import java.util.List;
+
+import org.springframework.security.oauth2.core.ClaimAccessor;
+import org.springframework.security.oauth2.core.OAuth2AuthorizationServerMetadataClaimAccessor;
+import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
+import org.springframework.security.oauth2.jwt.Jwt;
+
+/**
+ * A {@link ClaimAccessor} for the "claims" that can be returned
+ * in the OpenID Provider Configuration Response.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.0
+ * @see ClaimAccessor
+ * @see OAuth2AuthorizationServerMetadataClaimAccessor
+ * @see OidcProviderMetadataClaimNames
+ * @see OidcProviderConfiguration
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata">3. OpenID Provider Metadata</a>
+ */
+public interface OidcProviderMetadataClaimAccessor extends OAuth2AuthorizationServerMetadataClaimAccessor {
+
+	/**
+	 * Returns the Subject Identifier types supported {@code (subject_types_supported)}.
+	 *
+	 * @return the Subject Identifier types supported
+	 */
+	default List<String> getSubjectTypes() {
+		return getClaimAsStringList(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED);
+	}
+
+	/**
+	 * Returns the {@link JwsAlgorithm JWS} signing algorithms supported for the {@link OidcIdToken ID Token}
+	 * to encode the claims in a {@link Jwt} {@code (id_token_signing_alg_values_supported)}.
+	 *
+	 * @return the {@link JwsAlgorithm JWS} signing algorithms supported for the {@link OidcIdToken ID Token}
+	 */
+	default List<String> getIdTokenSigningAlgorithms() {
+		return getClaimAsStringList(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED);
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/OidcProviderMetadataClaimNames.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc;
+
+import org.springframework.security.oauth2.core.OAuth2AuthorizationServerMetadataClaimNames;
+import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
+
+/**
+ * The names of the "claims" defined by OpenID Connect Discovery 1.0 that can be returned
+ * in the OpenID Provider Configuration Response.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.0
+ * @see OAuth2AuthorizationServerMetadataClaimNames
+ * @see <a target="_blank" href="https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata">3. OpenID Provider Metadata</a>
+ */
+public interface OidcProviderMetadataClaimNames extends OAuth2AuthorizationServerMetadataClaimNames {
+
+	/**
+	 * {@code subject_types_supported} - the Subject Identifier types supported
+	 */
+	String SUBJECT_TYPES_SUPPORTED = "subject_types_supported";
+
+	/**
+	 * {@code id_token_signing_alg_values_supported} - the {@link JwsAlgorithm JWS} signing algorithms supported for the {@link OidcIdToken ID Token}
+	 */
+	String ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED = "id_token_signing_alg_values_supported";
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/http/converter/HttpMessageConverters.java

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc.http.converter;
+
+import org.springframework.http.converter.GenericHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.GsonHttpMessageConverter;
+import org.springframework.http.converter.json.JsonbHttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.util.ClassUtils;
+
+/**
+ * TODO
+ * This class is a straight copy from Spring Security.
+ * It should be consolidated when merging this codebase into Spring Security.
+ *
+ * Utility methods for {@link HttpMessageConverter}'s.
+ *
+ * @author Joe Grandja
+ * @since 5.1
+ */
+final class HttpMessageConverters {
+
+	private static final boolean jackson2Present;
+
+	private static final boolean gsonPresent;
+
+	private static final boolean jsonbPresent;
+
+	static {
+		ClassLoader classLoader = HttpMessageConverters.class.getClassLoader();
+		jackson2Present = ClassUtils.isPresent("com.fasterxml.jackson.databind.ObjectMapper", classLoader)
+				&& ClassUtils.isPresent("com.fasterxml.jackson.core.JsonGenerator", classLoader);
+		gsonPresent = ClassUtils.isPresent("com.google.gson.Gson", classLoader);
+		jsonbPresent = ClassUtils.isPresent("javax.json.bind.Jsonb", classLoader);
+	}
+
+	private HttpMessageConverters() {
+	}
+
+	static GenericHttpMessageConverter<Object> getJsonMessageConverter() {
+		if (jackson2Present) {
+			return new MappingJackson2HttpMessageConverter();
+		}
+		if (gsonPresent) {
+			return new GsonHttpMessageConverter();
+		}
+		if (jsonbPresent) {
+			return new JsonbHttpMessageConverter();
+		}
+		return null;
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/http/converter/OidcClientRegistrationHttpMessageConverter.java

@@ -0,0 +1,209 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc.http.converter;
+
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.convert.TypeDescriptor;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.AbstractHttpMessageConverter;
+import org.springframework.http.converter.GenericHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.security.oauth2.core.converter.ClaimTypeConverter;
+import org.springframework.security.oauth2.core.oidc.OidcClientMetadataClaimNames;
+import org.springframework.security.oauth2.core.oidc.OidcClientRegistration;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * A {@link HttpMessageConverter} for an {@link OidcClientRegistration OpenID Client Registration Request and Response}.
+ *
+ * @author Ovidiu Popa
+ * @author Joe Grandja
+ * @since 0.1.1
+ * @see AbstractHttpMessageConverter
+ * @see OidcClientRegistration
+ */
+public class OidcClientRegistrationHttpMessageConverter extends AbstractHttpMessageConverter<OidcClientRegistration> {
+
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP = new ParameterizedTypeReference<Map<String, Object>>() {
+	};
+
+	private final GenericHttpMessageConverter<Object> jsonMessageConverter = HttpMessageConverters.getJsonMessageConverter();
+
+	private Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter = new MapOidcClientRegistrationConverter();
+	private Converter<OidcClientRegistration, Map<String, Object>> clientRegistrationParametersConverter = new OidcClientRegistrationMapConverter();
+
+	public OidcClientRegistrationHttpMessageConverter() {
+		super(MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
+	}
+
+	@Override
+	protected boolean supports(Class<?> clazz) {
+		return OidcClientRegistration.class.isAssignableFrom(clazz);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	protected OidcClientRegistration readInternal(Class<? extends OidcClientRegistration> clazz, HttpInputMessage inputMessage)
+			throws HttpMessageNotReadableException {
+		try {
+			Map<String, Object> clientRegistrationParameters = (Map<String, Object>) this.jsonMessageConverter
+					.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
+			return this.clientRegistrationConverter.convert(clientRegistrationParameters);
+		} catch (Exception ex) {
+			throw new HttpMessageNotReadableException(
+					"An error occurred reading the OpenID Client Registration: " + ex.getMessage(), ex, inputMessage);
+		}
+	}
+
+	@Override
+	protected void writeInternal(OidcClientRegistration clientRegistration, HttpOutputMessage outputMessage)
+			throws HttpMessageNotWritableException {
+		try {
+			Map<String, Object> clientRegistrationParameters = this.clientRegistrationParametersConverter
+					.convert(clientRegistration);
+			this.jsonMessageConverter.write(clientRegistrationParameters, STRING_OBJECT_MAP.getType(),
+					MediaType.APPLICATION_JSON, outputMessage);
+		} catch (Exception ex) {
+			throw new HttpMessageNotWritableException(
+					"An error occurred writing the OpenID Client Registration: " + ex.getMessage(), ex);
+		}
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the OpenID Client Registration parameters to an {@link OidcClientRegistration}.
+	 *
+	 * @param clientRegistrationConverter the {@link Converter} used for converting to an {@link OidcClientRegistration}
+	 */
+	public final void setClientRegistrationConverter(
+			Converter<Map<String, Object>, OidcClientRegistration> clientRegistrationConverter) {
+		Assert.notNull(clientRegistrationConverter, "clientRegistrationConverter cannot be null");
+		this.clientRegistrationConverter = clientRegistrationConverter;
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the {@link OidcClientRegistration}
+	 * to a {@code Map} representation of the OpenID Client Registration parameters.
+	 *
+	 * @param clientRegistrationParametersConverter the {@link Converter} used for converting to a
+	 * {@code Map} representation of the OpenID Client Registration parameters
+	 */
+	public final void setClientRegistrationParametersConverter(
+			Converter<OidcClientRegistration, Map<String, Object>> clientRegistrationParametersConverter) {
+		Assert.notNull(clientRegistrationParametersConverter, "clientRegistrationParametersConverter cannot be null");
+		this.clientRegistrationParametersConverter = clientRegistrationParametersConverter;
+	}
+
+	private static final class MapOidcClientRegistrationConverter
+			implements Converter<Map<String, Object>, OidcClientRegistration> {
+
+		private static final ClaimConversionService CLAIM_CONVERSION_SERVICE = ClaimConversionService.getSharedInstance();
+		private static final TypeDescriptor OBJECT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Object.class);
+		private static final TypeDescriptor STRING_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(String.class);
+		private static final TypeDescriptor INSTANT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Instant.class);
+		private static final Converter<Object, ?> INSTANT_CONVERTER = getConverter(INSTANT_TYPE_DESCRIPTOR);
+		private final ClaimTypeConverter claimTypeConverter;
+
+		private MapOidcClientRegistrationConverter() {
+			Converter<Object, ?> stringConverter = getConverter(STRING_TYPE_DESCRIPTOR);
+			Converter<Object, ?> collectionStringConverter = getConverter(
+					TypeDescriptor.collection(Collection.class, STRING_TYPE_DESCRIPTOR));
+
+			Map<String, Converter<Object, ?>> claimConverters = new HashMap<>();
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_ID, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, INSTANT_CONVERTER);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_SECRET, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, MapOidcClientRegistrationConverter::convertClientSecretExpiresAt);
+			claimConverters.put(OidcClientMetadataClaimNames.CLIENT_NAME, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.REDIRECT_URIS, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHOD, stringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.GRANT_TYPES, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.RESPONSE_TYPES, collectionStringConverter);
+			claimConverters.put(OidcClientMetadataClaimNames.SCOPE, MapOidcClientRegistrationConverter::convertScope);
+			claimConverters.put(OidcClientMetadataClaimNames.ID_TOKEN_SIGNED_RESPONSE_ALG, stringConverter);
+			this.claimTypeConverter = new ClaimTypeConverter(claimConverters);
+		}
+
+		@Override
+		public OidcClientRegistration convert(Map<String, Object> source) {
+			Map<String, Object> parsedClaims = this.claimTypeConverter.convert(source);
+			Object clientSecretExpiresAt = parsedClaims.get(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
+			if (clientSecretExpiresAt instanceof Number && clientSecretExpiresAt.equals(0)) {
+				parsedClaims.remove(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT);
+			}
+			return OidcClientRegistration.withClaims(parsedClaims).build();
+		}
+
+		private static Converter<Object, ?> getConverter(TypeDescriptor targetDescriptor) {
+			return source -> CLAIM_CONVERSION_SERVICE.convert(source, OBJECT_TYPE_DESCRIPTOR, targetDescriptor);
+		}
+
+		private static Instant convertClientSecretExpiresAt(Object clientSecretExpiresAt) {
+			if (clientSecretExpiresAt != null && String.valueOf(clientSecretExpiresAt).equals("0")) {
+				// 0 indicates that client_secret_expires_at does not expire
+				return null;
+			}
+			return (Instant) INSTANT_CONVERTER.convert(clientSecretExpiresAt);
+		}
+
+		private static List<String> convertScope(Object scope) {
+			if (scope == null) {
+				return Collections.emptyList();
+			}
+			return Arrays.asList(StringUtils.delimitedListToStringArray(scope.toString(), " "));
+		}
+	}
+
+	private static final class OidcClientRegistrationMapConverter
+			implements Converter<OidcClientRegistration, Map<String, Object>> {
+
+		@Override
+		public Map<String, Object> convert(OidcClientRegistration source) {
+			Map<String, Object> responseClaims = new LinkedHashMap<>(source.getClaims());
+			if (source.getClientIdIssuedAt() != null) {
+				responseClaims.put(OidcClientMetadataClaimNames.CLIENT_ID_ISSUED_AT, source.getClientIdIssuedAt().getEpochSecond());
+			}
+			if (source.getClientSecret() != null) {
+				long clientSecretExpiresAt = 0;
+				if (source.getClientSecretExpiresAt() != null) {
+					clientSecretExpiresAt = source.getClientSecretExpiresAt().getEpochSecond();
+				}
+				responseClaims.put(OidcClientMetadataClaimNames.CLIENT_SECRET_EXPIRES_AT, clientSecretExpiresAt);
+			}
+			if (!CollectionUtils.isEmpty(source.getScopes())) {
+				responseClaims.put(OidcClientMetadataClaimNames.SCOPE, StringUtils.collectionToDelimitedString(source.getScopes(), " "));
+			}
+			return responseClaims;
+		}
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/core/oidc/http/converter/OidcProviderConfigurationHttpMessageConverter.java

@@ -0,0 +1,161 @@
+/*
+ * Copyright 2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.core.oidc.http.converter;
+
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.core.convert.TypeDescriptor;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.http.HttpInputMessage;
+import org.springframework.http.HttpOutputMessage;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.AbstractHttpMessageConverter;
+import org.springframework.http.converter.GenericHttpMessageConverter;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.http.converter.HttpMessageNotWritableException;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.security.oauth2.core.converter.ClaimTypeConverter;
+import org.springframework.security.oauth2.core.oidc.OidcProviderConfiguration;
+import org.springframework.security.oauth2.core.oidc.OidcProviderMetadataClaimNames;
+import org.springframework.util.Assert;
+
+import java.net.URL;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A {@link HttpMessageConverter} for an {@link OidcProviderConfiguration OpenID Provider Configuration Response}.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.0
+ * @see AbstractHttpMessageConverter
+ * @see OidcProviderConfiguration
+ */
+public class OidcProviderConfigurationHttpMessageConverter
+		extends AbstractHttpMessageConverter<OidcProviderConfiguration> {
+
+	private static final ParameterizedTypeReference<Map<String, Object>> STRING_OBJECT_MAP =
+			new ParameterizedTypeReference<Map<String, Object>>() {};
+
+	private final GenericHttpMessageConverter<Object> jsonMessageConverter = HttpMessageConverters.getJsonMessageConverter();
+
+	private Converter<Map<String, Object>, OidcProviderConfiguration> providerConfigurationConverter = new OidcProviderConfigurationConverter();
+	private Converter<OidcProviderConfiguration, Map<String, Object>> providerConfigurationParametersConverter = OidcProviderConfiguration::getClaims;
+
+	public OidcProviderConfigurationHttpMessageConverter() {
+		super(MediaType.APPLICATION_JSON, new MediaType("application", "*+json"));
+	}
+
+	@Override
+	protected boolean supports(Class<?> clazz) {
+		return OidcProviderConfiguration.class.isAssignableFrom(clazz);
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	protected OidcProviderConfiguration readInternal(Class<? extends OidcProviderConfiguration> clazz, HttpInputMessage inputMessage)
+			throws HttpMessageNotReadableException {
+		try {
+			Map<String, Object> providerConfigurationParameters =
+					(Map<String, Object>) this.jsonMessageConverter.read(STRING_OBJECT_MAP.getType(), null, inputMessage);
+			return this.providerConfigurationConverter.convert(providerConfigurationParameters);
+		} catch (Exception ex) {
+			throw new HttpMessageNotReadableException(
+					"An error occurred reading the OpenID Provider Configuration: " + ex.getMessage(), ex, inputMessage);
+		}
+	}
+
+	@Override
+	protected void writeInternal(OidcProviderConfiguration providerConfiguration, HttpOutputMessage outputMessage)
+			throws HttpMessageNotWritableException {
+		try {
+			Map<String, Object> providerConfigurationResponseParameters =
+					this.providerConfigurationParametersConverter.convert(providerConfiguration);
+			this.jsonMessageConverter.write(
+					providerConfigurationResponseParameters,
+					STRING_OBJECT_MAP.getType(),
+					MediaType.APPLICATION_JSON,
+					outputMessage
+			);
+		} catch (Exception ex) {
+			throw new HttpMessageNotWritableException(
+					"An error occurred writing the OpenID Provider Configuration: " + ex.getMessage(), ex);
+		}
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the OpenID Provider Configuration parameters
+	 * to an {@link OidcProviderConfiguration}.
+	 *
+	 * @param providerConfigurationConverter the {@link Converter} used for converting to an
+	 * {@link OidcProviderConfiguration}
+	 */
+	public final void setProviderConfigurationConverter(Converter<Map<String, Object>, OidcProviderConfiguration> providerConfigurationConverter) {
+		Assert.notNull(providerConfigurationConverter, "providerConfigurationConverter cannot be null");
+		this.providerConfigurationConverter = providerConfigurationConverter;
+	}
+
+	/**
+	 * Sets the {@link Converter} used for converting the {@link OidcProviderConfiguration} to a
+	 * {@code Map} representation of the OpenID Provider Configuration.
+	 *
+	 * @param providerConfigurationParametersConverter the {@link Converter} used for converting to a
+	 * {@code Map} representation of the OpenID Provider Configuration
+	 */
+	public final void setProviderConfigurationParametersConverter(
+			Converter<OidcProviderConfiguration, Map<String, Object>> providerConfigurationParametersConverter) {
+		Assert.notNull(providerConfigurationParametersConverter, "providerConfigurationParametersConverter cannot be null");
+		this.providerConfigurationParametersConverter = providerConfigurationParametersConverter;
+	}
+
+	private static final class OidcProviderConfigurationConverter implements Converter<Map<String, Object>, OidcProviderConfiguration> {
+		private static final ClaimConversionService CLAIM_CONVERSION_SERVICE = ClaimConversionService.getSharedInstance();
+		private static final TypeDescriptor OBJECT_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(Object.class);
+		private static final TypeDescriptor STRING_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(String.class);
+		private static final TypeDescriptor URL_TYPE_DESCRIPTOR = TypeDescriptor.valueOf(URL.class);
+		private final ClaimTypeConverter claimTypeConverter;
+
+		private OidcProviderConfigurationConverter() {
+			Converter<Object, ?> collectionStringConverter = getConverter(
+					TypeDescriptor.collection(Collection.class, STRING_TYPE_DESCRIPTOR));
+			Converter<Object, ?> urlConverter = getConverter(URL_TYPE_DESCRIPTOR);
+
+			Map<String, Converter<Object, ?>> claimConverters = new HashMap<>();
+			claimConverters.put(OidcProviderMetadataClaimNames.ISSUER, urlConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.AUTHORIZATION_ENDPOINT, urlConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.TOKEN_ENDPOINT, urlConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.TOKEN_ENDPOINT_AUTH_METHODS_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.JWKS_URI, urlConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.RESPONSE_TYPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.GRANT_TYPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.SUBJECT_TYPES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.ID_TOKEN_SIGNING_ALG_VALUES_SUPPORTED, collectionStringConverter);
+			claimConverters.put(OidcProviderMetadataClaimNames.SCOPES_SUPPORTED, collectionStringConverter);
+			this.claimTypeConverter = new ClaimTypeConverter(claimConverters);
+		}
+
+		@Override
+		public OidcProviderConfiguration convert(Map<String, Object> source) {
+			Map<String, Object> parsedClaims = this.claimTypeConverter.convert(source);
+			return OidcProviderConfiguration.withClaims(parsedClaims).build();
+		}
+
+		private static Converter<Object, ?> getConverter(TypeDescriptor targetDescriptor) {
+			return (source) -> CLAIM_CONVERSION_SERVICE.convert(source, OBJECT_TYPE_DESCRIPTOR, targetDescriptor);
+		}
+	}
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jose/jws/NimbusJwsEncoder.java

@@ -1,324 +0,0 @@
-/*
- * Copyright 2020 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.springframework.security.oauth2.jose.jws;
-
-import com.nimbusds.jose.JOSEException;
-import com.nimbusds.jose.JOSEObjectType;
-import com.nimbusds.jose.JWSAlgorithm;
-import com.nimbusds.jose.JWSHeader;
-import com.nimbusds.jose.JWSSigner;
-import com.nimbusds.jose.KeyLengthException;
-import com.nimbusds.jose.crypto.MACSigner;
-import com.nimbusds.jose.crypto.RSASSASigner;
-import com.nimbusds.jose.jwk.JWK;
-import com.nimbusds.jose.util.Base64;
-import com.nimbusds.jose.util.Base64URL;
-import com.nimbusds.jwt.JWTClaimsSet;
-import com.nimbusds.jwt.SignedJWT;
-import org.springframework.core.convert.converter.Converter;
-import org.springframework.security.crypto.keys.KeyManager;
-import org.springframework.security.crypto.keys.ManagedKey;
-import org.springframework.security.oauth2.jose.JoseHeader;
-import org.springframework.security.oauth2.jose.JoseHeaderNames;
-import org.springframework.security.oauth2.jwt.Jwt;
-import org.springframework.security.oauth2.jwt.JwtClaimsSet;
-import org.springframework.security.oauth2.jwt.JwtEncoder;
-import org.springframework.security.oauth2.jwt.JwtEncodingException;
-import org.springframework.util.Assert;
-import org.springframework.util.CollectionUtils;
-import org.springframework.util.StringUtils;
-
-import javax.crypto.SecretKey;
-import java.net.URI;
-import java.net.URL;
-import java.security.PrivateKey;
-import java.time.Instant;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.UUID;
-import java.util.stream.Collectors;
-
-/**
- * An implementation of a {@link JwtEncoder} that encodes a JSON Web Token (JWT)
- * using the JSON Web Signature (JWS) Compact Serialization format.
- * The private/secret key used for signing the JWS is obtained
- * from the {@link KeyManager} supplied via the constructor.
- *
- * <p>
- * <b>NOTE:</b> This implementation uses the Nimbus JOSE + JWT SDK.
- *
- * @author Joe Grandja
- * @since 0.0.1
- * @see JwtEncoder
- * @see KeyManager
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7519">JSON Web Token (JWT)</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515">JSON Web Signature (JWS)</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515#section-3.1">JWS Compact Serialization</a>
- * @see <a target="_blank" href="https://connect2id.com/products/nimbus-jose-jwt">Nimbus JOSE + JWT SDK</a>
- */
-public final class NimbusJwsEncoder implements JwtEncoder {
-	private static final String ENCODING_ERROR_MESSAGE_TEMPLATE =
-			"An error occurred while attempting to encode the Jwt: %s";
-	private static final String RSA_KEY_TYPE = "RSA";
-	private static final String EC_KEY_TYPE = "EC";
-	private static final Map<JwsAlgorithm, String> jcaKeyAlgorithmMappings = new HashMap<JwsAlgorithm, String>() {
-		{
-			put(MacAlgorithm.HS256, "HmacSHA256");
-			put(MacAlgorithm.HS384, "HmacSHA384");
-			put(MacAlgorithm.HS512, "HmacSHA512");
-			put(SignatureAlgorithm.RS256, RSA_KEY_TYPE);
-			put(SignatureAlgorithm.RS384, RSA_KEY_TYPE);
-			put(SignatureAlgorithm.RS512, RSA_KEY_TYPE);
-			put(SignatureAlgorithm.ES256, EC_KEY_TYPE);
-			put(SignatureAlgorithm.ES384, EC_KEY_TYPE);
-			put(SignatureAlgorithm.ES512, EC_KEY_TYPE);
-		}
-	};
-	private static final Converter<JoseHeader, JWSHeader> jwsHeaderConverter = new JwsHeaderConverter();
-	private static final Converter<JwtClaimsSet, JWTClaimsSet> jwtClaimsSetConverter = new JwtClaimsSetConverter();
-	private final KeyManager keyManager;
-
-	/**
-	 * Constructs a {@code NimbusJwsEncoder} using the provided parameters.
-	 *
-	 * @param keyManager the key manager
-	 */
-	public NimbusJwsEncoder(KeyManager keyManager) {
-		Assert.notNull(keyManager, "keyManager cannot be null");
-		this.keyManager = keyManager;
-	}
-
-	@Override
-	public Jwt encode(JoseHeader headers, JwtClaimsSet claims) throws JwtEncodingException {
-		Assert.notNull(headers, "headers cannot be null");
-		Assert.notNull(claims, "claims cannot be null");
-
-		ManagedKey managedKey = selectKey(headers);
-		if (managedKey == null) {
-			throw new JwtEncodingException(String.format(
-					ENCODING_ERROR_MESSAGE_TEMPLATE,
-					"Unsupported key for algorithm '" + headers.getJwsAlgorithm().getName() + "'"));
-		}
-
-		JWSSigner jwsSigner;
-		if (managedKey.isAsymmetric()) {
-			if (!managedKey.getAlgorithm().equals(RSA_KEY_TYPE)) {
-				throw new JwtEncodingException(String.format(
-						ENCODING_ERROR_MESSAGE_TEMPLATE,
-						"Unsupported key type '" + managedKey.getAlgorithm() + "'"));
-			}
-			PrivateKey privateKey = managedKey.getKey();
-			jwsSigner = new RSASSASigner(privateKey);
-		} else {
-			SecretKey secretKey = managedKey.getKey();
-			try {
-				jwsSigner = new MACSigner(secretKey);
-			} catch (KeyLengthException ex) {
-				throw new JwtEncodingException(String.format(
-						ENCODING_ERROR_MESSAGE_TEMPLATE, ex.getMessage()), ex);
-			}
-		}
-
-		headers = JoseHeader.from(headers)
-				.type(JOSEObjectType.JWT.getType())
-				.keyId(managedKey.getKeyId())
-				.build();
-		JWSHeader jwsHeader = jwsHeaderConverter.convert(headers);
-
-		claims = JwtClaimsSet.from(claims)
-				.id(UUID.randomUUID().toString())
-				.build();
-		JWTClaimsSet jwtClaimsSet = jwtClaimsSetConverter.convert(claims);
-
-		SignedJWT signedJWT = new SignedJWT(jwsHeader, jwtClaimsSet);
-		try {
-			signedJWT.sign(jwsSigner);
-		} catch (JOSEException ex) {
-			throw new JwtEncodingException(String.format(
-					ENCODING_ERROR_MESSAGE_TEMPLATE, ex.getMessage()), ex);
-		}
-		String jws = signedJWT.serialize();
-
-		return new Jwt(jws, claims.getIssuedAt(), claims.getExpiresAt(),
-				headers.getHeaders(), claims.getClaims());
-	}
-
-	private ManagedKey selectKey(JoseHeader headers) {
-		JwsAlgorithm jwsAlgorithm = headers.getJwsAlgorithm();
-		String keyAlgorithm = jcaKeyAlgorithmMappings.get(jwsAlgorithm);
-		if (!StringUtils.hasText(keyAlgorithm)) {
-			return null;
-		}
-
-		Set<ManagedKey> matchingKeys = this.keyManager.findByAlgorithm(keyAlgorithm);
-		if (CollectionUtils.isEmpty(matchingKeys)) {
-			return null;
-		}
-
-		return matchingKeys.stream()
-				.filter(ManagedKey::isActive)
-				.max(this::mostRecentActivated)
-				.orElse(null);
-	}
-
-	private int mostRecentActivated(ManagedKey managedKey1, ManagedKey managedKey2) {
-		return managedKey1.getActivatedOn().isAfter(managedKey2.getActivatedOn()) ? 1 : -1;
-	}
-
-	private static class JwsHeaderConverter implements Converter<JoseHeader, JWSHeader> {
-
-		@Override
-		public JWSHeader convert(JoseHeader headers) {
-			JWSHeader.Builder builder = new JWSHeader.Builder(
-					JWSAlgorithm.parse(headers.getJwsAlgorithm().getName()));
-
-			Set<String> critical = headers.getCritical();
-			if (!CollectionUtils.isEmpty(critical)) {
-				builder.criticalParams(critical);
-			}
-
-			String contentType = headers.getContentType();
-			if (StringUtils.hasText(contentType)) {
-				builder.contentType(contentType);
-			}
-
-			String jwkSetUri = headers.getJwkSetUri();
-			if (StringUtils.hasText(jwkSetUri)) {
-				try {
-					builder.jwkURL(new URI(jwkSetUri));
-				} catch (Exception ex) {
-					throw new JwtEncodingException(String.format(
-							ENCODING_ERROR_MESSAGE_TEMPLATE,
-							"Failed to convert '" + JoseHeaderNames.JKU + "' JOSE header"), ex);
-				}
-			}
-
-			Map<String, Object> jwk = headers.getJwk();
-			if (!CollectionUtils.isEmpty(jwk)) {
-				try {
-					builder.jwk(JWK.parse(jwk));
-				} catch (Exception ex) {
-					throw new JwtEncodingException(String.format(
-							ENCODING_ERROR_MESSAGE_TEMPLATE,
-							"Failed to convert '" + JoseHeaderNames.JWK + "' JOSE header"), ex);
-				}
-			}
-
-			String keyId = headers.getKeyId();
-			if (StringUtils.hasText(keyId)) {
-				builder.keyID(keyId);
-			}
-
-			String type = headers.getType();
-			if (StringUtils.hasText(type)) {
-				builder.type(new JOSEObjectType(type));
-			}
-
-			List<String> x509CertificateChain = headers.getX509CertificateChain();
-			if (!CollectionUtils.isEmpty(x509CertificateChain)) {
-				builder.x509CertChain(
-						x509CertificateChain.stream()
-								.map(Base64::new)
-								.collect(Collectors.toList()));
-			}
-
-			String x509SHA1Thumbprint = headers.getX509SHA1Thumbprint();
-			if (StringUtils.hasText(x509SHA1Thumbprint)) {
-				builder.x509CertThumbprint(new Base64URL(x509SHA1Thumbprint));
-			}
-
-			String x509SHA256Thumbprint = headers.getX509SHA256Thumbprint();
-			if (StringUtils.hasText(x509SHA256Thumbprint)) {
-				builder.x509CertSHA256Thumbprint(new Base64URL(x509SHA256Thumbprint));
-			}
-
-			String x509Uri = headers.getX509Uri();
-			if (StringUtils.hasText(x509Uri)) {
-				try {
-					builder.x509CertURL(new URI(x509Uri));
-				} catch (Exception ex) {
-					throw new JwtEncodingException(String.format(
-							ENCODING_ERROR_MESSAGE_TEMPLATE,
-							"Failed to convert '" + JoseHeaderNames.X5U + "' JOSE header"), ex);
-				}
-			}
-
-			Map<String, Object> customHeaders = headers.getHeaders().entrySet().stream()
-					.filter(header -> !JWSHeader.getRegisteredParameterNames().contains(header.getKey()))
-					.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
-			if (!CollectionUtils.isEmpty(customHeaders)) {
-				builder.customParams(customHeaders);
-			}
-
-			return builder.build();
-		}
-	}
-
-	private static class JwtClaimsSetConverter implements Converter<JwtClaimsSet, JWTClaimsSet> {
-
-		@Override
-		public JWTClaimsSet convert(JwtClaimsSet claims) {
-			JWTClaimsSet.Builder builder = new JWTClaimsSet.Builder();
-
-			URL issuer = claims.getIssuer();
-			if (issuer != null) {
-				builder.issuer(issuer.toExternalForm());
-			}
-
-			String subject = claims.getSubject();
-			if (StringUtils.hasText(subject)) {
-				builder.subject(subject);
-			}
-
-			List<String> audience = claims.getAudience();
-			if (!CollectionUtils.isEmpty(audience)) {
-				builder.audience(audience);
-			}
-
-			Instant issuedAt = claims.getIssuedAt();
-			if (issuedAt != null) {
-				builder.issueTime(Date.from(issuedAt));
-			}
-
-			Instant expiresAt = claims.getExpiresAt();
-			if (expiresAt != null) {
-				builder.expirationTime(Date.from(expiresAt));
-			}
-
-			Instant notBefore = claims.getNotBefore();
-			if (notBefore != null) {
-				builder.notBeforeTime(Date.from(notBefore));
-			}
-
-			String jwtId = claims.getId();
-			if (StringUtils.hasText(jwtId)) {
-				builder.jwtID(jwtId);
-			}
-
-			Map<String, Object> customClaims = claims.getClaims().entrySet().stream()
-					.filter(claim -> !JWTClaimsSet.getRegisteredNames().contains(claim.getKey()))
-					.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
-			if (!CollectionUtils.isEmpty(customClaims)) {
-				customClaims.forEach(builder::claim);
-			}
-
-			return builder.build();
-		}
-	}
-}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jwt/JoseHeader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,30 +13,19 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.jose;
-
-import org.springframework.security.oauth2.jose.jws.JwsAlgorithm;
-import org.springframework.security.oauth2.jwt.Jwt;
-import org.springframework.util.Assert;
+package org.springframework.security.oauth2.jwt;
 
+import java.net.URL;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.function.Consumer;
 
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.ALG;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.CRIT;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.CTY;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.JKU;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.JWK;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.KID;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.TYP;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.X5C;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.X5T;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.X5T_S256;
-import static org.springframework.security.oauth2.jose.JoseHeaderNames.X5U;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.security.oauth2.jose.JwaAlgorithm;
+import org.springframework.util.Assert;
 
 /**
  * The JOSE header is a JSON object representing the header parameters of a JSON Web Token,
@@ -47,24 +36,25 @@ import static org.springframework.security.oauth2.jose.JoseHeaderNames.X5U;
  * @author Joe Grandja
  * @since 0.0.1
  * @see Jwt
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7519#section-5">JWT JOSE Header</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515#section-4">JWS JOSE Header</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7516#section-4">JWE JOSE Header</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7519#section-5">JWT JOSE Header</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7515#section-4">JWS JOSE Header</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7516#section-4">JWE JOSE Header</a>
  */
 public final class JoseHeader {
 	private final Map<String, Object> headers;
 
 	private JoseHeader(Map<String, Object> headers) {
-		this.headers = Collections.unmodifiableMap(new LinkedHashMap<>(headers));
+		this.headers = Collections.unmodifiableMap(new HashMap<>(headers));
 	}
 
 	/**
-	 * Returns the JWS algorithm used to digitally sign the JWS.
+	 * Returns the {@link JwaAlgorithm JWA algorithm} used to digitally sign the JWS or encrypt the JWE.
 	 *
-	 * @return the JWS algorithm
+	 * @return the {@link JwaAlgorithm}
 	 */
-	public JwsAlgorithm getJwsAlgorithm() {
-		return getHeader(ALG);
+	@SuppressWarnings("unchecked")
+	public <T extends JwaAlgorithm> T getAlgorithm() {
+		return (T) getHeader(JoseHeaderNames.ALG);
 	}
 
 	/**
@@ -73,8 +63,8 @@ public final class JoseHeader {
 	 *
 	 * @return the JWK Set URL
 	 */
-	public String getJwkSetUri() {
-		return getHeader(JKU);
+	public URL getJwkSetUrl() {
+		return getHeader(JoseHeaderNames.JKU);
 	}
 
 	/**
@@ -84,7 +74,7 @@ public final class JoseHeader {
 	 * @return the JSON Web Key
 	 */
 	public Map<String, Object> getJwk() {
-		return getHeader(JWK);
+		return getHeader(JoseHeaderNames.JWK);
 	}
 
 	/**
@@ -93,7 +83,7 @@ public final class JoseHeader {
 	 * @return the key ID
 	 */
 	public String getKeyId() {
-		return getHeader(KID);
+		return getHeader(JoseHeaderNames.KID);
 	}
 
 	/**
@@ -102,18 +92,21 @@ public final class JoseHeader {
 	 *
 	 * @return the X.509 URL
 	 */
-	public String getX509Uri() {
-		return getHeader(X5U);
+	public URL getX509Url() {
+		return getHeader(JoseHeaderNames.X5U);
 	}
 
 	/**
 	 * Returns the X.509 certificate chain that contains the X.509 public key certificate
-	 * or certificate chain corresponding to the key used to digitally sign the JWS or encrypt the JWE.
+	 * or certificate chain corresponding to the key used to digitally sign the JWS or
+	 * encrypt the JWE. The certificate or certificate chain is represented as a
+	 * {@code List} of certificate value {@code String}s. Each {@code String} in the
+	 * {@code List} is a Base64-encoded DER PKIX certificate value.
 	 *
 	 * @return the X.509 certificate chain
 	 */
 	public List<String> getX509CertificateChain() {
-		return getHeader(X5C);
+		return getHeader(JoseHeaderNames.X5C);
 	}
 
 	/**
@@ -123,7 +116,7 @@ public final class JoseHeader {
 	 * @return the X.509 certificate SHA-1 thumbprint
 	 */
 	public String getX509SHA1Thumbprint() {
-		return getHeader(X5T);
+		return getHeader(JoseHeaderNames.X5T);
 	}
 
 	/**
@@ -133,7 +126,25 @@ public final class JoseHeader {
 	 * @return the X.509 certificate SHA-256 thumbprint
 	 */
 	public String getX509SHA256Thumbprint() {
-		return getHeader(X5T_S256);
+		return getHeader(JoseHeaderNames.X5T_S256);
+	}
+
+	/**
+	 * Returns the type header that declares the media type of the JWS/JWE.
+	 *
+	 * @return the type header
+	 */
+	public String getType() {
+		return getHeader(JoseHeaderNames.TYP);
+	}
+
+	/**
+	 * Returns the content type header that declares the media type of the secured content (the payload).
+	 *
+	 * @return the content type header
+	 */
+	public String getContentType() {
+		return getHeader(JoseHeaderNames.CTY);
 	}
 
 	/**
@@ -143,25 +154,7 @@ public final class JoseHeader {
 	 * @return the critical headers
 	 */
 	public Set<String> getCritical() {
-		return getHeader(CRIT);
-	}
-
-	/**
-	 * Returns the type header that declares the media type of the JWS/JWE.
-	 *
-	 * @return the type header
-	 */
-	public String getType() {
-		return getHeader(TYP);
-	}
-
-	/**
-	 * Returns the content type header that declares the media type of the secured content (the payload).
-	 *
-	 * @return the content type header
-	 */
-	public String getContentType() {
-		return getHeader(CTY);
+		return getHeader(JoseHeaderNames.CRIT);
 	}
 
 	/**
@@ -187,13 +180,22 @@ public final class JoseHeader {
 	}
 
 	/**
-	 * Returns a new {@link Builder}, initialized with the provided {@link JwsAlgorithm}.
+	 * Returns a new {@link Builder}.
 	 *
-	 * @param jwsAlgorithm the {@link JwsAlgorithm}
 	 * @return the {@link Builder}
 	 */
-	public static Builder withAlgorithm(JwsAlgorithm jwsAlgorithm) {
-		return new Builder(jwsAlgorithm);
+	public static Builder builder() {
+		return new Builder();
+	}
+
+	/**
+	 * Returns a new {@link Builder}, initialized with the provided {@link JwaAlgorithm}.
+	 *
+	 * @param jwaAlgorithm the {@link JwaAlgorithm}
+	 * @return the {@link Builder}
+	 */
+	public static Builder withAlgorithm(JwaAlgorithm jwaAlgorithm) {
+		return new Builder(jwaAlgorithm);
 	}
 
 	/**
@@ -209,12 +211,14 @@ public final class JoseHeader {
 	/**
 	 * A builder for {@link JoseHeader}.
 	 */
-	public static class Builder {
-		private final Map<String, Object> headers = new LinkedHashMap<>();
+	public static final class Builder {
+		private final Map<String, Object> headers = new HashMap<>();
 
-		private Builder(JwsAlgorithm jwsAlgorithm) {
-			Assert.notNull(jwsAlgorithm, "jwsAlgorithm cannot be null");
-			header(ALG, jwsAlgorithm);
+		private Builder() {
+		}
+
+		private Builder(JwaAlgorithm jwaAlgorithm) {
+			algorithm(jwaAlgorithm);
 		}
 
 		private Builder(JoseHeader headers) {
@@ -222,15 +226,26 @@ public final class JoseHeader {
 			this.headers.putAll(headers.getHeaders());
 		}
 
+		/**
+		 * Sets the {@link JwaAlgorithm JWA algorithm} used to digitally sign the JWS or encrypt the JWE.
+		 *
+		 * @param jwaAlgorithm the {@link JwaAlgorithm}
+		 * @return the {@link Builder}
+		 */
+		public Builder algorithm(JwaAlgorithm jwaAlgorithm) {
+			Assert.notNull(jwaAlgorithm, "jwaAlgorithm cannot be null");
+			return header(JoseHeaderNames.ALG, jwaAlgorithm);
+		}
+
 		/**
 		 * Sets the JWK Set URL that refers to the resource of a set of JSON-encoded public keys,
 		 * one of which corresponds to the key used to digitally sign the JWS or encrypt the JWE.
 		 *
-		 * @param jwkSetUri the JWK Set URL
+		 * @param jwkSetUrl the JWK Set URL
 		 * @return the {@link Builder}
 		 */
-		public Builder jwkSetUri(String jwkSetUri) {
-			return header(JKU, jwkSetUri);
+		public Builder jwkSetUrl(String jwkSetUrl) {
+			return header(JoseHeaderNames.JKU, convertAsURL(JoseHeaderNames.JKU, jwkSetUrl));
 		}
 
 		/**
@@ -241,7 +256,7 @@ public final class JoseHeader {
 		 * @return the {@link Builder}
 		 */
 		public Builder jwk(Map<String, Object> jwk) {
-			return header(JWK, jwk);
+			return header(JoseHeaderNames.JWK, jwk);
 		}
 
 		/**
@@ -251,29 +266,32 @@ public final class JoseHeader {
 		 * @return the {@link Builder}
 		 */
 		public Builder keyId(String keyId) {
-			return header(KID, keyId);
+			return header(JoseHeaderNames.KID, keyId);
 		}
 
 		/**
 		 * Sets the X.509 URL that refers to the resource for the X.509 public key certificate
 		 * or certificate chain corresponding to the key used to digitally sign the JWS or encrypt the JWE.
 		 *
-		 * @param x509Uri the X.509 URL
+		 * @param x509Url the X.509 URL
 		 * @return the {@link Builder}
 		 */
-		public Builder x509Uri(String x509Uri) {
-			return header(X5U, x509Uri);
+		public Builder x509Url(String x509Url) {
+			return header(JoseHeaderNames.X5U, convertAsURL(JoseHeaderNames.X5U, x509Url));
 		}
 
 		/**
 		 * Sets the X.509 certificate chain that contains the X.509 public key certificate
-		 * or certificate chain corresponding to the key used to digitally sign the JWS or encrypt the JWE.
+		 * or certificate chain corresponding to the key used to digitally sign the JWS or
+		 * encrypt the JWE. The certificate or certificate chain is represented as a
+		 * {@code List} of certificate value {@code String}s. Each {@code String} in the
+		 * {@code List} is a Base64-encoded DER PKIX certificate value.
 		 *
 		 * @param x509CertificateChain the X.509 certificate chain
 		 * @return the {@link Builder}
 		 */
 		public Builder x509CertificateChain(List<String> x509CertificateChain) {
-			return header(X5C, x509CertificateChain);
+			return header(JoseHeaderNames.X5C, x509CertificateChain);
 		}
 
 		/**
@@ -284,7 +302,7 @@ public final class JoseHeader {
 		 * @return the {@link Builder}
 		 */
 		public Builder x509SHA1Thumbprint(String x509SHA1Thumbprint) {
-			return header(X5T, x509SHA1Thumbprint);
+			return header(JoseHeaderNames.X5T, x509SHA1Thumbprint);
 		}
 
 		/**
@@ -295,7 +313,27 @@ public final class JoseHeader {
 		 * @return the {@link Builder}
 		 */
 		public Builder x509SHA256Thumbprint(String x509SHA256Thumbprint) {
-			return header(X5T_S256, x509SHA256Thumbprint);
+			return header(JoseHeaderNames.X5T_S256, x509SHA256Thumbprint);
+		}
+
+		/**
+		 * Sets the type header that declares the media type of the JWS/JWE.
+		 *
+		 * @param type the type header
+		 * @return the {@link Builder}
+		 */
+		public Builder type(String type) {
+			return header(JoseHeaderNames.TYP, type);
+		}
+
+		/**
+		 * Sets the content type header that declares the media type of the secured content (the payload).
+		 *
+		 * @param contentType the content type header
+		 * @return the {@link Builder}
+		 */
+		public Builder contentType(String contentType) {
+			return header(JoseHeaderNames.CTY, contentType);
 		}
 
 		/**
@@ -306,27 +344,7 @@ public final class JoseHeader {
 		 * @return the {@link Builder}
 		 */
 		public Builder critical(Set<String> headerNames) {
-			return header(CRIT, headerNames);
-		}
-
-		/**
-		 * Sets the type header that declares the media type of the JWS/JWE.
-		 *
-		 * @param type the type header
-		 * @return the {@link Builder}
-		 */
-		public Builder type(String type) {
-			return header(TYP, type);
-		}
-
-		/**
-		 * Sets the content type header that declares the media type of the secured content (the payload).
-		 *
-		 * @param contentType the content type header
-		 * @return the {@link Builder}
-		 */
-		public Builder contentType(String contentType) {
-			return header(CTY, contentType);
+			return header(JoseHeaderNames.CRIT, headerNames);
 		}
 
 		/**
@@ -364,5 +382,13 @@ public final class JoseHeader {
 			Assert.notEmpty(this.headers, "headers cannot be empty");
 			return new JoseHeader(this.headers);
 		}
+
+		private static URL convertAsURL(String header, String value) {
+			URL convertedValue = ClaimConversionService.getSharedInstance().convert(value, URL.class);
+			Assert.isTrue(convertedValue != null,
+					() -> "Unable to convert header '" + header + "' of type '" + value.getClass() + "' to URL.");
+			return convertedValue;
+		}
+
 	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jwt/JoseHeaderNames.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package org.springframework.security.oauth2.jose;
+package org.springframework.security.oauth2.jwt;
 
 /**
  * The Registered Header Parameter Names defined by the JSON Web Token (JWT),
@@ -28,69 +28,72 @@ package org.springframework.security.oauth2.jose;
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515#section-4">JWS JOSE Header</a>
  * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7516#section-4">JWE JOSE Header</a>
  */
-public interface JoseHeaderNames {
+public final class JoseHeaderNames {
 
 	/**
 	 * {@code alg} - the algorithm header identifies the cryptographic algorithm used to secure a JWS or JWE
 	 */
-	String ALG = "alg";
+	public static final String ALG = "alg";
 
 	/**
 	 * {@code jku} - the JWK Set URL header is a URI that refers to a resource for a set of JSON-encoded public keys,
 	 * one of which corresponds to the key used to digitally sign a JWS or encrypt a JWE
 	 */
-	String JKU = "jku";
+	public static final String JKU = "jku";
 
 	/**
 	 * {@code jwk} - the JSON Web Key header is the public key that corresponds to the key
 	 * used to digitally sign a JWS or encrypt a JWE
 	 */
-	String JWK = "jwk";
+	public static final String JWK = "jwk";
 
 	/**
 	 * {@code kid} - the key ID header is a hint indicating which key was used to secure a JWS or JWE
 	 */
-	String KID = "kid";
+	public static final String KID = "kid";
 
 	/**
 	 * {@code x5u} - the X.509 URL header is a URI that refers to a resource for the X.509 public key certificate
 	 * or certificate chain corresponding to the key used to digitally sign a JWS or encrypt a JWE
 	 */
-	String X5U = "x5u";
+	public static final String X5U = "x5u";
 
 	/**
 	 * {@code x5c} - the X.509 certificate chain header contains the X.509 public key certificate
 	 * or certificate chain corresponding to the key used to digitally sign a JWS or encrypt a JWE
 	 */
-	String X5C = "x5c";
+	public static final String X5C = "x5c";
 
 	/**
 	 * {@code x5t} - the X.509 certificate SHA-1 thumbprint header is a base64url-encoded SHA-1 thumbprint (a.k.a. digest)
 	 * of the DER encoding of the X.509 certificate corresponding to the key used to digitally sign a JWS or encrypt a JWE
 	 */
-	String X5T = "x5t";
+	public static final String X5T = "x5t";
 
 	/**
 	 * {@code x5t#S256} - the X.509 certificate SHA-256 thumbprint header is a base64url-encoded SHA-256 thumbprint (a.k.a. digest)
 	 * of the DER encoding of the X.509 certificate corresponding to the key used to digitally sign a JWS or encrypt a JWE
 	 */
-	String X5T_S256 = "x5t#S256";
+	public static final String X5T_S256 = "x5t#S256";
 
 	/**
 	 * {@code typ} - the type header is used by JWS/JWE applications to declare the media type of a JWS/JWE
 	 */
-	String TYP = "typ";
+	public static final String TYP = "typ";
 
 	/**
 	 * {@code cty} - the content type header is used by JWS/JWE applications to declare the media type
 	 * of the secured content (the payload)
 	 */
-	String CTY = "cty";
+	public static final String CTY = "cty";
 
 	/**
 	 * {@code crit} - the critical header indicates that extensions to the JWS/JWE/JWA specifications
 	 * are being used that MUST be understood and processed
 	 */
-	String CRIT = "crit";
+	public static final String CRIT = "crit";
+
+	private JoseHeaderNames() {
+	}
 
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jwt/JwtClaimsSet.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,23 +15,16 @@
  */
 package org.springframework.security.oauth2.jwt;
 
-import org.springframework.util.Assert;
-
 import java.net.URL;
 import java.time.Instant;
 import java.util.Collections;
-import java.util.LinkedHashMap;
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
 
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.AUD;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.EXP;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.IAT;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.ISS;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.JTI;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.NBF;
-import static org.springframework.security.oauth2.jwt.JwtClaimNames.SUB;
+import org.springframework.security.oauth2.core.converter.ClaimConversionService;
+import org.springframework.util.Assert;
 
 /**
  * The {@link Jwt JWT} Claims Set is a JSON object representing the claims conveyed by a JSON Web Token.
@@ -41,13 +34,13 @@ import static org.springframework.security.oauth2.jwt.JwtClaimNames.SUB;
  * @since 0.0.1
  * @see Jwt
  * @see JwtClaimAccessor
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7519#section-4">JWT Claims Set</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7519#section-4">JWT Claims Set</a>
  */
 public final class JwtClaimsSet implements JwtClaimAccessor {
 	private final Map<String, Object> claims;
 
 	private JwtClaimsSet(Map<String, Object> claims) {
-		this.claims = Collections.unmodifiableMap(new LinkedHashMap<>(claims));
+		this.claims = Collections.unmodifiableMap(new HashMap<>(claims));
 	}
 
 	@Override
@@ -60,7 +53,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 	 *
 	 * @return the {@link Builder}
 	 */
-	public static Builder withClaims() {
+	public static Builder builder() {
 		return new Builder();
 	}
 
@@ -77,8 +70,8 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 	/**
 	 * A builder for {@link JwtClaimsSet}.
 	 */
-	public static class Builder {
-		private final Map<String, Object> claims = new LinkedHashMap<>();
+	public static final class Builder {
+		private final Map<String, Object> claims = new HashMap<>();
 
 		private Builder() {
 		}
@@ -94,8 +87,8 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @param issuer the issuer identifier
 		 * @return the {@link Builder}
 		 */
-		public Builder issuer(URL issuer) {
-			return claim(ISS, issuer);
+		public Builder issuer(String issuer) {
+			return claim(JwtClaimNames.ISS, issuer);
 		}
 
 		/**
@@ -105,7 +98,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder subject(String subject) {
-			return claim(SUB, subject);
+			return claim(JwtClaimNames.SUB, subject);
 		}
 
 		/**
@@ -115,7 +108,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder audience(List<String> audience) {
-			return claim(AUD, audience);
+			return claim(JwtClaimNames.AUD, audience);
 		}
 
 		/**
@@ -126,7 +119,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder expiresAt(Instant expiresAt) {
-			return claim(EXP, expiresAt);
+			return claim(JwtClaimNames.EXP, expiresAt);
 		}
 
 		/**
@@ -137,7 +130,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder notBefore(Instant notBefore) {
-			return claim(NBF, notBefore);
+			return claim(JwtClaimNames.NBF, notBefore);
 		}
 
 		/**
@@ -147,7 +140,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder issuedAt(Instant issuedAt) {
-			return claim(IAT, issuedAt);
+			return claim(JwtClaimNames.IAT, issuedAt);
 		}
 
 		/**
@@ -157,7 +150,7 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 * @return the {@link Builder}
 		 */
 		public Builder id(String jti) {
-			return claim(JTI, jti);
+			return claim(JwtClaimNames.JTI, jti);
 		}
 
 		/**
@@ -175,10 +168,10 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		}
 
 		/**
-		 * A {@code Consumer} to be provided access to the claims set
+		 * A {@code Consumer} to be provided access to the claims
 		 * allowing the ability to add, replace, or remove.
 		 *
-		 * @param claimsConsumer a {@code Consumer} of the claims set
+		 * @param claimsConsumer a {@code Consumer} of the claims
 		 */
 		public Builder claims(Consumer<Map<String, Object>> claimsConsumer) {
 			claimsConsumer.accept(this.claims);
@@ -192,6 +185,17 @@ public final class JwtClaimsSet implements JwtClaimAccessor {
 		 */
 		public JwtClaimsSet build() {
 			Assert.notEmpty(this.claims, "claims cannot be empty");
+
+			// The value of the 'iss' claim is a String or URL (StringOrURI).
+			// Attempt to convert to URL.
+			Object issuer = this.claims.get(JwtClaimNames.ISS);
+			if (issuer != null) {
+				URL convertedValue = ClaimConversionService.getSharedInstance().convert(issuer, URL.class);
+				if (convertedValue != null) {
+					this.claims.put(JwtClaimNames.ISS, convertedValue);
+				}
+			}
+
 			return new JwtClaimsSet(this.claims);
 		}
 	}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jwt/JwtEncoder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,8 +15,6 @@
  */
 package org.springframework.security.oauth2.jwt;
 
-import org.springframework.security.oauth2.jose.JoseHeader;
-
 /**
  * Implementations of this interface are responsible for encoding
  * a JSON Web Token (JWT) to it's compact claims representation format.
@@ -34,11 +32,11 @@ import org.springframework.security.oauth2.jose.JoseHeader;
  * @see JoseHeader
  * @see JwtClaimsSet
  * @see JwtDecoder
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7519">JSON Web Token (JWT)</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515">JSON Web Signature (JWS)</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7516">JSON Web Encryption (JWE)</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7515#section-3.1">JWS Compact Serialization</a>
- * @see <a target="_blank" href="https://tools.ietf.org/html/rfc7516#section-3.1">JWE Compact Serialization</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7519">JSON Web Token (JWT)</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7515">JSON Web Signature (JWS)</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7516">JSON Web Encryption (JWE)</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7515#section-3.1">JWS Compact Serialization</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7516#section-3.1">JWE Compact Serialization</a>
  */
 @FunctionalInterface
 public interface JwtEncoder {

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/jwt/NimbusJwsEncoder.java

@@ -0,0 +1,342 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.jwt;
+
+import java.net.URI;
+import java.net.URL;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+import com.nimbusds.jose.JOSEException;
+import com.nimbusds.jose.JOSEObjectType;
+import com.nimbusds.jose.JWSAlgorithm;
+import com.nimbusds.jose.JWSHeader;
+import com.nimbusds.jose.JWSSigner;
+import com.nimbusds.jose.crypto.factories.DefaultJWSSignerFactory;
+import com.nimbusds.jose.jwk.JWK;
+import com.nimbusds.jose.jwk.JWKMatcher;
+import com.nimbusds.jose.jwk.JWKSelector;
+import com.nimbusds.jose.jwk.KeyType;
+import com.nimbusds.jose.jwk.KeyUse;
+import com.nimbusds.jose.jwk.source.JWKSource;
+import com.nimbusds.jose.proc.SecurityContext;
+import com.nimbusds.jose.produce.JWSSignerFactory;
+import com.nimbusds.jose.util.Base64;
+import com.nimbusds.jose.util.Base64URL;
+import com.nimbusds.jwt.JWTClaimsSet;
+import com.nimbusds.jwt.SignedJWT;
+
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * An implementation of a {@link JwtEncoder} that encodes a JSON Web Token (JWT) using the
+ * JSON Web Signature (JWS) Compact Serialization format. The private/secret key used for
+ * signing the JWS is supplied by the {@code com.nimbusds.jose.jwk.source.JWKSource}
+ * provided via the constructor.
+ *
+ * <p>
+ * <b>NOTE:</b> This implementation uses the Nimbus JOSE + JWT SDK.
+ *
+ * @author Joe Grandja
+ * @since 0.0.1
+ * @see JwtEncoder
+ * @see com.nimbusds.jose.jwk.source.JWKSource
+ * @see com.nimbusds.jose.jwk.JWK
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7519">JSON Web Token (JWT)</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7515">JSON Web Signature (JWS)</a>
+ * @see <a target="_blank" href="https://datatracker.ietf.org/doc/html/rfc7515#section-3.1">JWS Compact Serialization</a>
+ * @see <a target="_blank" href="https://connect2id.com/products/nimbus-jose-jwt">Nimbus JOSE + JWT SDK</a>
+ */
+public final class NimbusJwsEncoder implements JwtEncoder {
+	private static final String ENCODING_ERROR_MESSAGE_TEMPLATE = "An error occurred while attempting to encode the Jwt: %s";
+	private static final Converter<JoseHeader, JWSHeader> JWS_HEADER_CONVERTER = new JwsHeaderConverter();
+	private static final Converter<JwtClaimsSet, JWTClaimsSet> JWT_CLAIMS_SET_CONVERTER = new JwtClaimsSetConverter();
+	private static final JWSSignerFactory JWS_SIGNER_FACTORY = new DefaultJWSSignerFactory();
+	private final Map<JWK, JWSSigner> jwsSigners = new ConcurrentHashMap<>();
+	private final JWKSource<SecurityContext> jwkSource;
+
+	/**
+	 * Constructs a {@code NimbusJwsEncoder} using the provided parameters.
+	 * @param jwkSource the {@code com.nimbusds.jose.jwk.source.JWKSource}
+	 */
+	public NimbusJwsEncoder(JWKSource<SecurityContext> jwkSource) {
+		Assert.notNull(jwkSource, "jwkSource cannot be null");
+		this.jwkSource = jwkSource;
+	}
+
+	@Override
+	public Jwt encode(JoseHeader headers, JwtClaimsSet claims) throws JwtEncodingException {
+		Assert.notNull(headers, "headers cannot be null");
+		Assert.notNull(claims, "claims cannot be null");
+
+		JWK jwk = selectJwk(headers);
+		headers = addKeyIdentifierHeadersIfNecessary(headers, jwk);
+
+		String jws = serialize(headers, claims, jwk);
+
+		return new Jwt(jws, claims.getIssuedAt(), claims.getExpiresAt(), headers.getHeaders(), claims.getClaims());
+	}
+
+	private JWK selectJwk(JoseHeader headers) {
+		List<JWK> jwks;
+		try {
+			JWKSelector jwkSelector = new JWKSelector(createJwkMatcher(headers));
+			jwks = this.jwkSource.get(jwkSelector, null);
+		} catch (Exception ex) {
+			throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+					"Failed to select a JWK signing key -> " + ex.getMessage()), ex);
+		}
+
+		if (jwks.size() > 1) {
+			throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+					"Found multiple JWK signing keys for algorithm '" + headers.getAlgorithm().getName() + "'"));
+		}
+
+		if (jwks.isEmpty()) {
+			throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+					"Failed to select a JWK signing key"));
+		}
+
+		return jwks.get(0);
+	}
+
+	private String serialize(JoseHeader headers, JwtClaimsSet claims, JWK jwk) {
+		JWSHeader jwsHeader = JWS_HEADER_CONVERTER.convert(headers);
+		JWTClaimsSet jwtClaimsSet = JWT_CLAIMS_SET_CONVERTER.convert(claims);
+
+		JWSSigner jwsSigner = this.jwsSigners.computeIfAbsent(jwk, NimbusJwsEncoder::createSigner);
+
+		SignedJWT signedJwt = new SignedJWT(jwsHeader, jwtClaimsSet);
+		try {
+			signedJwt.sign(jwsSigner);
+		} catch (JOSEException ex) {
+			throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+					"Failed to sign the JWT -> " + ex.getMessage()), ex);
+		}
+		return signedJwt.serialize();
+	}
+
+	private static JWKMatcher createJwkMatcher(JoseHeader headers) {
+		JWSAlgorithm jwsAlgorithm = JWSAlgorithm.parse(headers.getAlgorithm().getName());
+
+		if (JWSAlgorithm.Family.RSA.contains(jwsAlgorithm) || JWSAlgorithm.Family.EC.contains(jwsAlgorithm)) {
+			// @formatter:off
+			return new JWKMatcher.Builder()
+					.keyType(KeyType.forAlgorithm(jwsAlgorithm))
+					.keyID(headers.getKeyId())
+					.keyUses(KeyUse.SIGNATURE, null)
+					.algorithms(jwsAlgorithm, null)
+					.x509CertSHA256Thumbprint(Base64URL.from(headers.getX509SHA256Thumbprint()))
+					.build();
+			// @formatter:on
+		} else if (JWSAlgorithm.Family.HMAC_SHA.contains(jwsAlgorithm)) {
+			// @formatter:off
+			return new JWKMatcher.Builder()
+					.keyType(KeyType.forAlgorithm(jwsAlgorithm))
+					.keyID(headers.getKeyId())
+					.privateOnly(true)
+					.algorithms(jwsAlgorithm, null)
+					.build();
+			// @formatter:on
+		}
+
+		return null;
+	}
+
+	private static JoseHeader addKeyIdentifierHeadersIfNecessary(JoseHeader headers, JWK jwk) {
+		// Check if headers have already been added
+		if (StringUtils.hasText(headers.getKeyId()) && StringUtils.hasText(headers.getX509SHA256Thumbprint())) {
+			return headers;
+		}
+		// Check if headers can be added from JWK
+		if (!StringUtils.hasText(jwk.getKeyID()) && jwk.getX509CertSHA256Thumbprint() == null) {
+			return headers;
+		}
+
+		JoseHeader.Builder headersBuilder = JoseHeader.from(headers);
+		if (!StringUtils.hasText(headers.getKeyId()) && StringUtils.hasText(jwk.getKeyID())) {
+			headersBuilder.keyId(jwk.getKeyID());
+		}
+		if (!StringUtils.hasText(headers.getX509SHA256Thumbprint()) && jwk.getX509CertSHA256Thumbprint() != null) {
+			headersBuilder.x509SHA256Thumbprint(jwk.getX509CertSHA256Thumbprint().toString());
+		}
+
+		return headersBuilder.build();
+	}
+
+	private static JWSSigner createSigner(JWK jwk) {
+		try {
+			return JWS_SIGNER_FACTORY.createJWSSigner(jwk);
+		} catch (JOSEException ex) {
+			throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+					"Failed to create a JWS Signer -> " + ex.getMessage()), ex);
+		}
+	}
+
+	private static class JwsHeaderConverter implements Converter<JoseHeader, JWSHeader> {
+
+		@Override
+		public JWSHeader convert(JoseHeader headers) {
+			JWSHeader.Builder builder = new JWSHeader.Builder(JWSAlgorithm.parse(headers.getAlgorithm().getName()));
+
+			if (headers.getJwkSetUrl() != null) {
+				builder.jwkURL(convertAsURI(JoseHeaderNames.JKU, headers.getJwkSetUrl()));
+			}
+
+			Map<String, Object> jwk = headers.getJwk();
+			if (!CollectionUtils.isEmpty(jwk)) {
+				try {
+					builder.jwk(JWK.parse(jwk));
+				} catch (Exception ex) {
+					throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+							"Unable to convert '" + JoseHeaderNames.JWK + "' JOSE header"), ex);
+				}
+			}
+
+			String keyId = headers.getKeyId();
+			if (StringUtils.hasText(keyId)) {
+				builder.keyID(keyId);
+			}
+
+			if (headers.getX509Url() != null) {
+				builder.x509CertURL(convertAsURI(JoseHeaderNames.X5U, headers.getX509Url()));
+			}
+
+			List<String> x509CertificateChain = headers.getX509CertificateChain();
+			if (!CollectionUtils.isEmpty(x509CertificateChain)) {
+				List<Base64> x5cList = new ArrayList<>();
+				x509CertificateChain.forEach((x5c) -> x5cList.add(new Base64(x5c)));
+				if (!x5cList.isEmpty()) {
+					builder.x509CertChain(x5cList);
+				}
+			}
+
+			String x509SHA1Thumbprint = headers.getX509SHA1Thumbprint();
+			if (StringUtils.hasText(x509SHA1Thumbprint)) {
+				builder.x509CertThumbprint(new Base64URL(x509SHA1Thumbprint));
+			}
+
+			String x509SHA256Thumbprint = headers.getX509SHA256Thumbprint();
+			if (StringUtils.hasText(x509SHA256Thumbprint)) {
+				builder.x509CertSHA256Thumbprint(new Base64URL(x509SHA256Thumbprint));
+			}
+
+			String type = headers.getType();
+			if (StringUtils.hasText(type)) {
+				builder.type(new JOSEObjectType(type));
+			}
+
+			String contentType = headers.getContentType();
+			if (StringUtils.hasText(contentType)) {
+				builder.contentType(contentType);
+			}
+
+			Set<String> critical = headers.getCritical();
+			if (!CollectionUtils.isEmpty(critical)) {
+				builder.criticalParams(critical);
+			}
+
+			Map<String, Object> customHeaders = new HashMap<>();
+			headers.getHeaders().forEach((name, value) -> {
+				if (!JWSHeader.getRegisteredParameterNames().contains(name)) {
+					customHeaders.put(name, value);
+				}
+			});
+			if (!customHeaders.isEmpty()) {
+				builder.customParams(customHeaders);
+			}
+
+			return builder.build();
+		}
+
+		private static URI convertAsURI(String header, URL url) {
+			try {
+				return url.toURI();
+			} catch (Exception ex) {
+				throw new JwtEncodingException(String.format(ENCODING_ERROR_MESSAGE_TEMPLATE,
+						"Unable to convert '" + header + "' JOSE header to a URI"), ex);
+			}
+		}
+
+	}
+
+	private static class JwtClaimsSetConverter implements Converter<JwtClaimsSet, JWTClaimsSet> {
+
+		@Override
+		public JWTClaimsSet convert(JwtClaimsSet claims) {
+			JWTClaimsSet.Builder builder = new JWTClaimsSet.Builder();
+
+			// NOTE: The value of the 'iss' claim is a String or URL (StringOrURI).
+			Object issuer = claims.getClaim(JwtClaimNames.ISS);
+			if (issuer != null) {
+				builder.issuer(issuer.toString());
+			}
+
+			String subject = claims.getSubject();
+			if (StringUtils.hasText(subject)) {
+				builder.subject(subject);
+			}
+
+			List<String> audience = claims.getAudience();
+			if (!CollectionUtils.isEmpty(audience)) {
+				builder.audience(audience);
+			}
+
+			Instant expiresAt = claims.getExpiresAt();
+			if (expiresAt != null) {
+				builder.expirationTime(Date.from(expiresAt));
+			}
+
+			Instant notBefore = claims.getNotBefore();
+			if (notBefore != null) {
+				builder.notBeforeTime(Date.from(notBefore));
+			}
+
+			Instant issuedAt = claims.getIssuedAt();
+			if (issuedAt != null) {
+				builder.issueTime(Date.from(issuedAt));
+			}
+
+			String jwtId = claims.getId();
+			if (StringUtils.hasText(jwtId)) {
+				builder.jwtID(jwtId);
+			}
+
+			Map<String, Object> customClaims = new HashMap<>();
+			claims.getClaims().forEach((name, value) -> {
+				if (!JWTClaimsSet.getRegisteredNames().contains(name)) {
+					customClaims.put(name, value);
+				}
+			});
+			if (!customClaims.isEmpty()) {
+				customClaims.forEach(builder::claim);
+			}
+
+			return builder.build();
+		}
+
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/InMemoryOAuth2AuthorizationConsentService.java

@@ -0,0 +1,106 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * An {@link OAuth2AuthorizationConsentService} that stores {@link OAuth2AuthorizationConsent}'s in-memory.
+ *
+ * <p>
+ * <b>NOTE:</b> This implementation should ONLY be used during development/testing.
+ *
+ * @author Daniel Garnier-Moiroux
+ * @since 0.1.2
+ * @see OAuth2AuthorizationConsentService
+ */
+public final class InMemoryOAuth2AuthorizationConsentService implements OAuth2AuthorizationConsentService {
+	private final Map<Integer, OAuth2AuthorizationConsent> authorizationConsents = new ConcurrentHashMap<>();
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationConsentService}.
+	 */
+	public InMemoryOAuth2AuthorizationConsentService() {
+		this(Collections.emptyList());
+	}
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationConsentService} using the provided parameters.
+	 *
+	 * @param authorizationConsents the authorization consent(s)
+	 */
+	public InMemoryOAuth2AuthorizationConsentService(OAuth2AuthorizationConsent... authorizationConsents) {
+		this(Arrays.asList(authorizationConsents));
+	}
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationConsentService} using the provided parameters.
+	 *
+	 * @param authorizationConsents the authorization consent(s)
+	 */
+	public InMemoryOAuth2AuthorizationConsentService(List<OAuth2AuthorizationConsent> authorizationConsents) {
+		Assert.notNull(authorizationConsents, "authorizationConsents cannot be null");
+		authorizationConsents.forEach(authorizationConsent -> {
+			Assert.notNull(authorizationConsent, "authorizationConsent cannot be null");
+			int id = getId(authorizationConsent);
+			Assert.isTrue(!this.authorizationConsents.containsKey(id),
+					"The authorizationConsent must be unique. Found duplicate, with registered client id: ["
+							+ authorizationConsent.getRegisteredClientId()
+							+ "] and principal name: [" + authorizationConsent.getPrincipalName() + "]");
+			this.authorizationConsents.put(id, authorizationConsent);
+		});
+	}
+
+	@Override
+	public void save(OAuth2AuthorizationConsent authorizationConsent) {
+		Assert.notNull(authorizationConsent, "authorizationConsent cannot be null");
+		int id = getId(authorizationConsent);
+		this.authorizationConsents.put(id, authorizationConsent);
+	}
+
+	@Override
+	public void remove(OAuth2AuthorizationConsent authorizationConsent) {
+		Assert.notNull(authorizationConsent, "authorizationConsent cannot be null");
+		int id = getId(authorizationConsent);
+		this.authorizationConsents.remove(id, authorizationConsent);
+	}
+
+	@Override
+	@Nullable
+	public OAuth2AuthorizationConsent findById(String registeredClientId, String principalName) {
+		Assert.hasText(registeredClientId, "registeredClientId cannot be empty");
+		Assert.hasText(principalName, "principalName cannot be empty");
+		int id = getId(registeredClientId, principalName);
+		return this.authorizationConsents.get(id);
+	}
+
+	private static int getId(String registeredClientId, String principalName) {
+		return Objects.hash(registeredClientId, principalName);
+	}
+
+	private static int getId(OAuth2AuthorizationConsent authorizationConsent) {
+		return getId(authorizationConsent.getRegisteredClientId(), authorizationConsent.getPrincipalName());
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/InMemoryOAuth2AuthorizationService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020 the original author or authors.
+ * Copyright 2020-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,89 +15,133 @@
  */
 package org.springframework.security.oauth2.server.authorization;
 
-import org.springframework.lang.Nullable;
-import org.springframework.security.oauth2.server.authorization.Version;
-import org.springframework.util.Assert;
-
-import java.io.Serializable;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.Map;
-import java.util.Objects;
 import java.util.concurrent.ConcurrentHashMap;
 
+import org.springframework.lang.Nullable;
+import org.springframework.security.oauth2.core.OAuth2AccessToken;
+import org.springframework.security.oauth2.core.OAuth2AuthorizationCode;
+import org.springframework.security.oauth2.core.OAuth2RefreshToken;
+import org.springframework.security.oauth2.core.OAuth2TokenType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.util.Assert;
+
 /**
  * An {@link OAuth2AuthorizationService} that stores {@link OAuth2Authorization}'s in-memory.
  *
+ * <p>
+ * <b>NOTE:</b> This implementation should ONLY be used during development/testing.
+ *
  * @author Krisztian Toth
  * @author Joe Grandja
  * @since 0.0.1
  * @see OAuth2AuthorizationService
  */
 public final class InMemoryOAuth2AuthorizationService implements OAuth2AuthorizationService {
-	private final Map<OAuth2AuthorizationId, OAuth2Authorization> authorizations = new ConcurrentHashMap<>();
+	private final Map<String, OAuth2Authorization> authorizations = new ConcurrentHashMap<>();
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationService}.
+	 */
+	public InMemoryOAuth2AuthorizationService() {
+		this(Collections.emptyList());
+	}
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationService} using the provided parameters.
+	 *
+	 * @param authorizations the authorization(s)
+	 */
+	public InMemoryOAuth2AuthorizationService(OAuth2Authorization... authorizations) {
+		this(Arrays.asList(authorizations));
+	}
+
+	/**
+	 * Constructs an {@code InMemoryOAuth2AuthorizationService} using the provided parameters.
+	 *
+	 * @param authorizations the authorization(s)
+	 */
+	public InMemoryOAuth2AuthorizationService(List<OAuth2Authorization> authorizations) {
+		Assert.notNull(authorizations, "authorizations cannot be null");
+		authorizations.forEach(authorization -> {
+			Assert.notNull(authorization, "authorization cannot be null");
+			Assert.isTrue(!this.authorizations.containsKey(authorization.getId()),
+					"The authorization must be unique. Found duplicate identifier: " + authorization.getId());
+			this.authorizations.put(authorization.getId(), authorization);
+		});
+	}
 
 	@Override
 	public void save(OAuth2Authorization authorization) {
 		Assert.notNull(authorization, "authorization cannot be null");
-		OAuth2AuthorizationId authorizationId = new OAuth2AuthorizationId(
-				authorization.getRegisteredClientId(), authorization.getPrincipalName());
-		this.authorizations.put(authorizationId, authorization);
+		this.authorizations.put(authorization.getId(), authorization);
 	}
 
 	@Override
 	public void remove(OAuth2Authorization authorization) {
 		Assert.notNull(authorization, "authorization cannot be null");
-		OAuth2AuthorizationId authorizationId = new OAuth2AuthorizationId(
-				authorization.getRegisteredClientId(), authorization.getPrincipalName());
-		this.authorizations.remove(authorizationId, authorization);
+		this.authorizations.remove(authorization.getId(), authorization);
 	}
 
+	@Nullable
 	@Override
-	public OAuth2Authorization findByToken(String token, @Nullable TokenType tokenType) {
-		Assert.hasText(token, "token cannot be empty");
-		return this.authorizations.values().stream()
-				.filter(authorization -> hasToken(authorization, token, tokenType))
-				.findFirst()
-				.orElse(null);
+	public OAuth2Authorization findById(String id) {
+		Assert.hasText(id, "id cannot be empty");
+		return this.authorizations.get(id);
 	}
 
-	private boolean hasToken(OAuth2Authorization authorization, String token, TokenType tokenType) {
-		if (OAuth2AuthorizationAttributeNames.STATE.equals(tokenType.getValue())) {
-			return token.equals(authorization.getAttribute(OAuth2AuthorizationAttributeNames.STATE));
-		} else if (TokenType.AUTHORIZATION_CODE.equals(tokenType)) {
-			return token.equals(authorization.getAttribute(OAuth2AuthorizationAttributeNames.CODE));
-		} else if (TokenType.ACCESS_TOKEN.equals(tokenType)) {
-			return authorization.getAccessToken() != null &&
-					authorization.getAccessToken().getTokenValue().equals(token);
+	@Nullable
+	@Override
+	public OAuth2Authorization findByToken(String token, @Nullable OAuth2TokenType tokenType) {
+		Assert.hasText(token, "token cannot be empty");
+		for (OAuth2Authorization authorization : this.authorizations.values()) {
+			if (hasToken(authorization, token, tokenType)) {
+				return authorization;
+			}
+		}
+		return null;
+	}
+
+	private static boolean hasToken(OAuth2Authorization authorization, String token, @Nullable OAuth2TokenType tokenType) {
+		if (tokenType == null) {
+			return matchesState(authorization, token) ||
+					matchesAuthorizationCode(authorization, token) ||
+					matchesAccessToken(authorization, token) ||
+					matchesRefreshToken(authorization, token);
+		} else if (OAuth2ParameterNames.STATE.equals(tokenType.getValue())) {
+			return matchesState(authorization, token);
+		} else if (OAuth2ParameterNames.CODE.equals(tokenType.getValue())) {
+			return matchesAuthorizationCode(authorization, token);
+		} else if (OAuth2TokenType.ACCESS_TOKEN.equals(tokenType)) {
+			return matchesAccessToken(authorization, token);
+		} else if (OAuth2TokenType.REFRESH_TOKEN.equals(tokenType)) {
+			return matchesRefreshToken(authorization, token);
 		}
 		return false;
 	}
 
-	private static class OAuth2AuthorizationId implements Serializable {
-		private static final long serialVersionUID = Version.SERIAL_VERSION_UID;
-		private final String registeredClientId;
-		private final String principalName;
+	private static boolean matchesState(OAuth2Authorization authorization, String token) {
+		return token.equals(authorization.getAttribute(OAuth2ParameterNames.STATE));
+	}
 
-		private OAuth2AuthorizationId(String registeredClientId, String principalName) {
-			this.registeredClientId = registeredClientId;
-			this.principalName = principalName;
-		}
+	private static boolean matchesAuthorizationCode(OAuth2Authorization authorization, String token) {
+		OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode =
+				authorization.getToken(OAuth2AuthorizationCode.class);
+		return authorizationCode != null && authorizationCode.getToken().getTokenValue().equals(token);
+	}
 
-		@Override
-		public boolean equals(Object obj) {
-			if (this == obj) {
-				return true;
-			}
-			if (obj == null || getClass() != obj.getClass()) {
-				return false;
-			}
-			OAuth2AuthorizationId that = (OAuth2AuthorizationId) obj;
-			return Objects.equals(this.registeredClientId, that.registeredClientId) &&
-					Objects.equals(this.principalName, that.principalName);
-		}
+	private static boolean matchesAccessToken(OAuth2Authorization authorization, String token) {
+		OAuth2Authorization.Token<OAuth2AccessToken> accessToken =
+				authorization.getToken(OAuth2AccessToken.class);
+		return accessToken != null && accessToken.getToken().getTokenValue().equals(token);
+	}
 
-		@Override
-		public int hashCode() {
-			return Objects.hash(this.registeredClientId, this.principalName);
-		}
+	private static boolean matchesRefreshToken(OAuth2Authorization authorization, String token) {
+		OAuth2Authorization.Token<OAuth2RefreshToken> refreshToken =
+				authorization.getToken(OAuth2RefreshToken.class);
+		return refreshToken != null && refreshToken.getToken().getTokenValue().equals(token);
 	}
 }

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/JdbcOAuth2AuthorizationConsentService.java

@@ -0,0 +1,261 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Types;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Function;
+
+import org.springframework.dao.DataRetrievalFailureException;
+import org.springframework.jdbc.core.ArgumentPreparedStatementSetter;
+import org.springframework.jdbc.core.JdbcOperations;
+import org.springframework.jdbc.core.PreparedStatementSetter;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.jdbc.core.SqlParameterValue;
+import org.springframework.lang.Nullable;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.authority.SimpleGrantedAuthority;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
+import org.springframework.util.Assert;
+import org.springframework.util.StringUtils;
+
+/**
+ * A JDBC implementation of an {@link OAuth2AuthorizationConsentService} that uses a
+ * {@link JdbcOperations} for {@link OAuth2AuthorizationConsent} persistence.
+ *
+ * <p>
+ * <b>NOTE:</b> This {@code OAuth2AuthorizationConsentService} depends on the table definition
+ * described in
+ * "classpath:org/springframework/security/oauth2/server/authorization/oauth2-authorization-consent-schema.sql" and
+ * therefore MUST be defined in the database schema.
+ *
+ * @author Ovidiu Popa
+ * @since 0.1.2
+ * @see OAuth2AuthorizationConsentService
+ * @see OAuth2AuthorizationConsent
+ * @see JdbcOperations
+ * @see RowMapper
+ */
+public class JdbcOAuth2AuthorizationConsentService implements OAuth2AuthorizationConsentService {
+
+	// @formatter:off
+	private static final String COLUMN_NAMES = "registered_client_id, "
+			+ "principal_name, "
+			+ "authorities";
+	// @formatter:on
+
+	private static final String TABLE_NAME = "oauth2_authorization_consent";
+
+	private static final String PK_FILTER = "registered_client_id = ? AND principal_name = ?";
+
+	// @formatter:off
+	private static final String LOAD_AUTHORIZATION_CONSENT_SQL = "SELECT " + COLUMN_NAMES
+			+ " FROM " + TABLE_NAME
+			+ " WHERE " + PK_FILTER;
+	// @formatter:on
+
+	// @formatter:off
+	private static final String SAVE_AUTHORIZATION_CONSENT_SQL = "INSERT INTO " + TABLE_NAME
+			+ " (" + COLUMN_NAMES + ") VALUES (?, ?, ?)";
+	// @formatter:on
+
+	// @formatter:off
+	private static final String UPDATE_AUTHORIZATION_CONSENT_SQL = "UPDATE " + TABLE_NAME
+			+ " SET authorities = ?"
+			+ " WHERE " + PK_FILTER;
+	// @formatter:on
+
+	private static final String REMOVE_AUTHORIZATION_CONSENT_SQL = "DELETE FROM " + TABLE_NAME + " WHERE " + PK_FILTER;
+
+	private final JdbcOperations jdbcOperations;
+	private RowMapper<OAuth2AuthorizationConsent> authorizationConsentRowMapper;
+	private Function<OAuth2AuthorizationConsent, List<SqlParameterValue>> authorizationConsentParametersMapper;
+
+	/**
+	 * Constructs a {@code JdbcOAuth2AuthorizationConsentService} using the provided parameters.
+	 *
+	 * @param jdbcOperations             the JDBC operations
+	 * @param registeredClientRepository the registered client repository
+	 */
+	public JdbcOAuth2AuthorizationConsentService(JdbcOperations jdbcOperations,
+			RegisteredClientRepository registeredClientRepository) {
+		Assert.notNull(jdbcOperations, "jdbcOperations cannot be null");
+		Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+		this.jdbcOperations = jdbcOperations;
+		this.authorizationConsentRowMapper = new OAuth2AuthorizationConsentRowMapper(registeredClientRepository);
+		this.authorizationConsentParametersMapper = new OAuth2AuthorizationConsentParametersMapper();
+	}
+
+	@Override
+	public void save(OAuth2AuthorizationConsent authorizationConsent) {
+		Assert.notNull(authorizationConsent, "authorizationConsent cannot be null");
+		OAuth2AuthorizationConsent existingAuthorizationConsent = findById(
+				authorizationConsent.getRegisteredClientId(), authorizationConsent.getPrincipalName());
+		if (existingAuthorizationConsent == null) {
+			insertAuthorizationConsent(authorizationConsent);
+		} else {
+			updateAuthorizationConsent(authorizationConsent);
+		}
+	}
+
+	private void updateAuthorizationConsent(OAuth2AuthorizationConsent authorizationConsent) {
+		List<SqlParameterValue> parameters = this.authorizationConsentParametersMapper.apply(authorizationConsent);
+		SqlParameterValue registeredClientId = parameters.remove(0);
+		SqlParameterValue principalName = parameters.remove(0);
+		parameters.add(registeredClientId);
+		parameters.add(principalName);
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters.toArray());
+		this.jdbcOperations.update(UPDATE_AUTHORIZATION_CONSENT_SQL, pss);
+	}
+
+	private void insertAuthorizationConsent(OAuth2AuthorizationConsent authorizationConsent) {
+		List<SqlParameterValue> parameters = this.authorizationConsentParametersMapper.apply(authorizationConsent);
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters.toArray());
+		this.jdbcOperations.update(SAVE_AUTHORIZATION_CONSENT_SQL, pss);
+	}
+
+	@Override
+	public void remove(OAuth2AuthorizationConsent authorizationConsent) {
+		Assert.notNull(authorizationConsent, "authorizationConsent cannot be null");
+		SqlParameterValue[] parameters = new SqlParameterValue[] {
+				new SqlParameterValue(Types.VARCHAR, authorizationConsent.getRegisteredClientId()),
+				new SqlParameterValue(Types.VARCHAR, authorizationConsent.getPrincipalName())
+		};
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters);
+		this.jdbcOperations.update(REMOVE_AUTHORIZATION_CONSENT_SQL, pss);
+	}
+
+	@Override
+	@Nullable
+	public OAuth2AuthorizationConsent findById(String registeredClientId, String principalName) {
+		Assert.hasText(registeredClientId, "registeredClientId cannot be empty");
+		Assert.hasText(principalName, "principalName cannot be empty");
+		SqlParameterValue[] parameters = new SqlParameterValue[] {
+				new SqlParameterValue(Types.VARCHAR, registeredClientId),
+				new SqlParameterValue(Types.VARCHAR, principalName)};
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters);
+		List<OAuth2AuthorizationConsent> result = this.jdbcOperations.query(LOAD_AUTHORIZATION_CONSENT_SQL, pss,
+				this.authorizationConsentRowMapper);
+		return !result.isEmpty() ? result.get(0) : null;
+	}
+
+	/**
+	 * Sets the {@link RowMapper} used for mapping the current row in
+	 * {@code java.sql.ResultSet} to {@link OAuth2AuthorizationConsent}. The default is
+	 * {@link OAuth2AuthorizationConsentRowMapper}.
+	 *
+	 * @param authorizationConsentRowMapper the {@link RowMapper} used for mapping the current
+	 *                                      row in {@code ResultSet} to {@link OAuth2AuthorizationConsent}
+	 */
+	public final void setAuthorizationConsentRowMapper(RowMapper<OAuth2AuthorizationConsent> authorizationConsentRowMapper) {
+		Assert.notNull(authorizationConsentRowMapper, "authorizationConsentRowMapper cannot be null");
+		this.authorizationConsentRowMapper = authorizationConsentRowMapper;
+	}
+
+	/**
+	 * Sets the {@code Function} used for mapping {@link OAuth2AuthorizationConsent} to
+	 * a {@code List} of {@link SqlParameterValue}. The default is
+	 * {@link OAuth2AuthorizationConsentParametersMapper}.
+	 *
+	 * @param authorizationConsentParametersMapper the {@code Function} used for mapping
+	 *                                             {@link OAuth2AuthorizationConsent} to a {@code List} of {@link SqlParameterValue}
+	 */
+	public final void setAuthorizationConsentParametersMapper(
+			Function<OAuth2AuthorizationConsent, List<SqlParameterValue>> authorizationConsentParametersMapper) {
+		Assert.notNull(authorizationConsentParametersMapper, "authorizationConsentParametersMapper cannot be null");
+		this.authorizationConsentParametersMapper = authorizationConsentParametersMapper;
+	}
+
+	protected final JdbcOperations getJdbcOperations() {
+		return this.jdbcOperations;
+	}
+
+	protected final RowMapper<OAuth2AuthorizationConsent> getAuthorizationConsentRowMapper() {
+		return this.authorizationConsentRowMapper;
+	}
+
+	protected final Function<OAuth2AuthorizationConsent, List<SqlParameterValue>> getAuthorizationConsentParametersMapper() {
+		return this.authorizationConsentParametersMapper;
+	}
+
+	/**
+	 * The default {@link RowMapper} that maps the current row in
+	 * {@code ResultSet} to {@link OAuth2AuthorizationConsent}.
+	 */
+	public static class OAuth2AuthorizationConsentRowMapper implements RowMapper<OAuth2AuthorizationConsent> {
+		private final RegisteredClientRepository registeredClientRepository;
+
+		public OAuth2AuthorizationConsentRowMapper(RegisteredClientRepository registeredClientRepository) {
+			Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+			this.registeredClientRepository = registeredClientRepository;
+		}
+
+		@Override
+		public OAuth2AuthorizationConsent mapRow(ResultSet rs, int rowNum) throws SQLException {
+			String registeredClientId = rs.getString("registered_client_id");
+			RegisteredClient registeredClient = this.registeredClientRepository.findById(registeredClientId);
+			if (registeredClient == null) {
+				throw new DataRetrievalFailureException(
+						"The RegisteredClient with id '" + registeredClientId + "' was not found in the RegisteredClientRepository.");
+			}
+
+			String principalName = rs.getString("principal_name");
+
+			OAuth2AuthorizationConsent.Builder builder = OAuth2AuthorizationConsent.withId(registeredClientId, principalName);
+			String authorizationConsentAuthorities = rs.getString("authorities");
+			if (authorizationConsentAuthorities != null) {
+				for (String authority : StringUtils.commaDelimitedListToSet(authorizationConsentAuthorities)) {
+					builder.authority(new SimpleGrantedAuthority(authority));
+				}
+			}
+			return builder.build();
+		}
+
+		protected final RegisteredClientRepository getRegisteredClientRepository() {
+			return this.registeredClientRepository;
+		}
+
+	}
+
+	/**
+	 * The default {@code Function} that maps {@link OAuth2AuthorizationConsent} to a
+	 * {@code List} of {@link SqlParameterValue}.
+	 */
+	public static class OAuth2AuthorizationConsentParametersMapper implements Function<OAuth2AuthorizationConsent, List<SqlParameterValue>> {
+
+		@Override
+		public List<SqlParameterValue> apply(OAuth2AuthorizationConsent authorizationConsent) {
+			List<SqlParameterValue> parameters = new ArrayList<>();
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorizationConsent.getRegisteredClientId()));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorizationConsent.getPrincipalName()));
+
+			Set<String> authorities = new HashSet<>();
+			for (GrantedAuthority authority : authorizationConsent.getAuthorities()) {
+				authorities.add(authority.getAuthority());
+			}
+			parameters.add(new SqlParameterValue(Types.VARCHAR, StringUtils.collectionToDelimitedString(authorities, ",")));
+			return parameters;
+		}
+
+	}
+
+}

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/JdbcOAuth2AuthorizationService.java

@@ -0,0 +1,578 @@
+/*
+ * Copyright 2020-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.security.oauth2.server.authorization;
+
+import java.nio.charset.StandardCharsets;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.sql.Types;
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Function;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.Module;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import org.springframework.dao.DataRetrievalFailureException;
+import org.springframework.jdbc.core.ArgumentPreparedStatementSetter;
+import org.springframework.jdbc.core.JdbcOperations;
+import org.springframework.jdbc.core.PreparedStatementSetter;
+import org.springframework.jdbc.core.RowMapper;
+import org.springframework.jdbc.core.SqlParameterValue;
+import org.springframework.jdbc.support.lob.DefaultLobHandler;
+import org.springframework.jdbc.support.lob.LobCreator;
+import org.springframework.jdbc.support.lob.LobHandler;
+import org.springframework.lang.Nullable;
+import org.springframework.security.jackson2.SecurityJackson2Modules;
+import org.springframework.security.oauth2.core.AbstractOAuth2Token;
+import org.springframework.security.oauth2.core.AuthorizationGrantType;
+import org.springframework.security.oauth2.core.OAuth2AccessToken;
+import org.springframework.security.oauth2.core.OAuth2AuthorizationCode;
+import org.springframework.security.oauth2.core.OAuth2RefreshToken;
+import org.springframework.security.oauth2.core.OAuth2TokenType;
+import org.springframework.security.oauth2.core.endpoint.OAuth2ParameterNames;
+import org.springframework.security.oauth2.core.oidc.OidcIdToken;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClient;
+import org.springframework.security.oauth2.server.authorization.client.RegisteredClientRepository;
+import org.springframework.security.oauth2.server.authorization.jackson2.OAuth2AuthorizationServerJackson2Module;
+import org.springframework.util.Assert;
+import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
+
+/**
+ * A JDBC implementation of an {@link OAuth2AuthorizationService} that uses a
+ * {@link JdbcOperations} for {@link OAuth2Authorization} persistence.
+ *
+ * <p>
+ * <b>NOTE:</b> This {@code OAuth2AuthorizationService} depends on the table definition
+ * described in
+ * "classpath:org/springframework/security/oauth2/server/authorization/oauth2-authorization-schema.sql" and
+ * therefore MUST be defined in the database schema.
+ *
+ * @author Ovidiu Popa
+ * @since 0.1.2
+ * @see OAuth2AuthorizationService
+ * @see OAuth2Authorization
+ * @see JdbcOperations
+ * @see RowMapper
+ */
+public class JdbcOAuth2AuthorizationService implements OAuth2AuthorizationService {
+
+	// @formatter:off
+	private static final String COLUMN_NAMES = "id, "
+			+ "registered_client_id, "
+			+ "principal_name, "
+			+ "authorization_grant_type, "
+			+ "attributes, "
+			+ "state, "
+			+ "authorization_code_value, "
+			+ "authorization_code_issued_at, "
+			+ "authorization_code_expires_at,"
+			+ "authorization_code_metadata,"
+			+ "access_token_value,"
+			+ "access_token_issued_at,"
+			+ "access_token_expires_at,"
+			+ "access_token_metadata,"
+			+ "access_token_type,"
+			+ "access_token_scopes,"
+			+ "oidc_id_token_value,"
+			+ "oidc_id_token_issued_at,"
+			+ "oidc_id_token_expires_at,"
+			+ "oidc_id_token_metadata,"
+			+ "refresh_token_value,"
+			+ "refresh_token_issued_at,"
+			+ "refresh_token_expires_at,"
+			+ "refresh_token_metadata";
+	// @formatter:on
+
+	private static final String TABLE_NAME = "oauth2_authorization";
+
+	private static final String PK_FILTER = "id = ?";
+	private static final String UNKNOWN_TOKEN_TYPE_FILTER = "state = ? OR authorization_code_value = ? OR " +
+			"access_token_value = ? OR refresh_token_value = ?";
+
+	private static final String STATE_FILTER = "state = ?";
+	private static final String AUTHORIZATION_CODE_FILTER = "authorization_code_value = ?";
+	private static final String ACCESS_TOKEN_FILTER = "access_token_value = ?";
+	private static final String REFRESH_TOKEN_FILTER = "refresh_token_value = ?";
+
+	// @formatter:off
+	private static final String LOAD_AUTHORIZATION_SQL = "SELECT " + COLUMN_NAMES
+			+ " FROM " + TABLE_NAME
+			+ " WHERE ";
+	// @formatter:on
+
+	// @formatter:off
+	private static final String SAVE_AUTHORIZATION_SQL = "INSERT INTO " + TABLE_NAME
+			+ " (" + COLUMN_NAMES + ") VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
+	// @formatter:on
+
+	// @formatter:off
+	private static final String UPDATE_AUTHORIZATION_SQL = "UPDATE " + TABLE_NAME
+			+ " SET registered_client_id = ?, principal_name = ?, authorization_grant_type = ?, attributes = ?, state = ?,"
+			+ " authorization_code_value = ?, authorization_code_issued_at = ?, authorization_code_expires_at = ?, authorization_code_metadata = ?,"
+			+ " access_token_value = ?, access_token_issued_at = ?, access_token_expires_at = ?, access_token_metadata = ?, access_token_type = ?, access_token_scopes = ?,"
+			+ " oidc_id_token_value = ?, oidc_id_token_issued_at = ?, oidc_id_token_expires_at = ?, oidc_id_token_metadata = ?,"
+			+ " refresh_token_value = ?, refresh_token_issued_at = ?, refresh_token_expires_at = ?, refresh_token_metadata = ?"
+			+ " WHERE " + PK_FILTER;
+	// @formatter:on
+
+	private static final String REMOVE_AUTHORIZATION_SQL = "DELETE FROM " + TABLE_NAME + " WHERE " + PK_FILTER;
+
+	private final JdbcOperations jdbcOperations;
+	private final LobHandler lobHandler;
+	private RowMapper<OAuth2Authorization> authorizationRowMapper;
+	private Function<OAuth2Authorization, List<SqlParameterValue>> authorizationParametersMapper;
+
+	/**
+	 * Constructs a {@code JdbcOAuth2AuthorizationService} using the provided parameters.
+	 *
+	 * @param jdbcOperations             the JDBC operations
+	 * @param registeredClientRepository the registered client repository
+	 */
+	public JdbcOAuth2AuthorizationService(JdbcOperations jdbcOperations,
+			RegisteredClientRepository registeredClientRepository) {
+		this(jdbcOperations, registeredClientRepository, new DefaultLobHandler());
+	}
+
+	/**
+	 * Constructs a {@code JdbcOAuth2AuthorizationService} using the provided parameters.
+	 *
+	 * @param jdbcOperations             the JDBC operations
+	 * @param registeredClientRepository the registered client repository
+	 * @param lobHandler                 the handler for large binary fields and large text fields
+	 */
+	public JdbcOAuth2AuthorizationService(JdbcOperations jdbcOperations,
+			RegisteredClientRepository registeredClientRepository, LobHandler lobHandler) {
+		Assert.notNull(jdbcOperations, "jdbcOperations cannot be null");
+		Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+		Assert.notNull(lobHandler, "lobHandler cannot be null");
+		this.jdbcOperations = jdbcOperations;
+		this.lobHandler = lobHandler;
+		OAuth2AuthorizationRowMapper authorizationRowMapper = new OAuth2AuthorizationRowMapper(registeredClientRepository);
+		authorizationRowMapper.setLobHandler(lobHandler);
+		this.authorizationRowMapper = authorizationRowMapper;
+		this.authorizationParametersMapper = new OAuth2AuthorizationParametersMapper();
+	}
+
+	@Override
+	public void save(OAuth2Authorization authorization) {
+		Assert.notNull(authorization, "authorization cannot be null");
+		OAuth2Authorization existingAuthorization = findById(authorization.getId());
+		if (existingAuthorization == null) {
+			insertAuthorization(authorization);
+		} else {
+			updateAuthorization(authorization);
+		}
+	}
+
+	private void updateAuthorization(OAuth2Authorization authorization) {
+		List<SqlParameterValue> parameters = this.authorizationParametersMapper.apply(authorization);
+		SqlParameterValue id = parameters.remove(0);
+		parameters.add(id);
+		try (LobCreator lobCreator = this.lobHandler.getLobCreator()) {
+			PreparedStatementSetter pss = new LobCreatorArgumentPreparedStatementSetter(lobCreator,
+					parameters.toArray());
+			this.jdbcOperations.update(UPDATE_AUTHORIZATION_SQL, pss);
+		}
+	}
+
+	private void insertAuthorization(OAuth2Authorization authorization) {
+		List<SqlParameterValue> parameters = this.authorizationParametersMapper.apply(authorization);
+		try (LobCreator lobCreator = this.lobHandler.getLobCreator()) {
+			PreparedStatementSetter pss = new LobCreatorArgumentPreparedStatementSetter(lobCreator,
+					parameters.toArray());
+			this.jdbcOperations.update(SAVE_AUTHORIZATION_SQL, pss);
+		}
+	}
+
+	@Override
+	public void remove(OAuth2Authorization authorization) {
+		Assert.notNull(authorization, "authorization cannot be null");
+		SqlParameterValue[] parameters = new SqlParameterValue[] {
+				new SqlParameterValue(Types.VARCHAR, authorization.getId())
+		};
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters);
+		this.jdbcOperations.update(REMOVE_AUTHORIZATION_SQL, pss);
+	}
+
+	@Nullable
+	@Override
+	public OAuth2Authorization findById(String id) {
+		Assert.hasText(id, "id cannot be empty");
+		List<SqlParameterValue> parameters = new ArrayList<>();
+		parameters.add(new SqlParameterValue(Types.VARCHAR, id));
+		return findBy(PK_FILTER, parameters);
+	}
+
+	@Nullable
+	@Override
+	public OAuth2Authorization findByToken(String token, @Nullable OAuth2TokenType tokenType) {
+		Assert.hasText(token, "token cannot be empty");
+		List<SqlParameterValue> parameters = new ArrayList<>();
+		if (tokenType == null) {
+			parameters.add(new SqlParameterValue(Types.VARCHAR, token));
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			return findBy(UNKNOWN_TOKEN_TYPE_FILTER, parameters);
+		} else if (OAuth2ParameterNames.STATE.equals(tokenType.getValue())) {
+			parameters.add(new SqlParameterValue(Types.VARCHAR, token));
+			return findBy(STATE_FILTER, parameters);
+		} else if (OAuth2ParameterNames.CODE.equals(tokenType.getValue())) {
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			return findBy(AUTHORIZATION_CODE_FILTER, parameters);
+		} else if (OAuth2TokenType.ACCESS_TOKEN.equals(tokenType)) {
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			return findBy(ACCESS_TOKEN_FILTER, parameters);
+		} else if (OAuth2TokenType.REFRESH_TOKEN.equals(tokenType)) {
+			parameters.add(new SqlParameterValue(Types.BLOB, token.getBytes(StandardCharsets.UTF_8)));
+			return findBy(REFRESH_TOKEN_FILTER, parameters);
+		}
+		return null;
+	}
+
+	private OAuth2Authorization findBy(String filter, List<SqlParameterValue> parameters) {
+		PreparedStatementSetter pss = new ArgumentPreparedStatementSetter(parameters.toArray());
+		List<OAuth2Authorization> result = this.jdbcOperations.query(LOAD_AUTHORIZATION_SQL + filter, pss, this.authorizationRowMapper);
+		return !result.isEmpty() ? result.get(0) : null;
+	}
+
+	/**
+	 * Sets the {@link RowMapper} used for mapping the current row in
+	 * {@code java.sql.ResultSet} to {@link OAuth2Authorization}. The default is
+	 * {@link OAuth2AuthorizationRowMapper}.
+	 *
+	 * @param authorizationRowMapper the {@link RowMapper} used for mapping the current
+	 *                               row in {@code ResultSet} to {@link OAuth2Authorization}
+	 */
+	public final void setAuthorizationRowMapper(RowMapper<OAuth2Authorization> authorizationRowMapper) {
+		Assert.notNull(authorizationRowMapper, "authorizationRowMapper cannot be null");
+		this.authorizationRowMapper = authorizationRowMapper;
+	}
+
+	/**
+	 * Sets the {@code Function} used for mapping {@link OAuth2Authorization} to
+	 * a {@code List} of {@link SqlParameterValue}. The default is
+	 * {@link OAuth2AuthorizationParametersMapper}.
+	 *
+	 * @param authorizationParametersMapper the {@code Function} used for mapping
+	 *                                      {@link OAuth2Authorization} to a {@code List} of {@link SqlParameterValue}
+	 */
+	public final void setAuthorizationParametersMapper(
+			Function<OAuth2Authorization, List<SqlParameterValue>> authorizationParametersMapper) {
+		Assert.notNull(authorizationParametersMapper, "authorizationParametersMapper cannot be null");
+		this.authorizationParametersMapper = authorizationParametersMapper;
+	}
+
+	protected final JdbcOperations getJdbcOperations() {
+		return this.jdbcOperations;
+	}
+
+	protected final LobHandler getLobHandler() {
+		return this.lobHandler;
+	}
+
+	protected final RowMapper<OAuth2Authorization> getAuthorizationRowMapper() {
+		return this.authorizationRowMapper;
+	}
+
+	protected final Function<OAuth2Authorization, List<SqlParameterValue>> getAuthorizationParametersMapper() {
+		return this.authorizationParametersMapper;
+	}
+
+	/**
+	 * The default {@link RowMapper} that maps the current row in
+	 * {@code java.sql.ResultSet} to {@link OAuth2Authorization}.
+	 */
+	public static class OAuth2AuthorizationRowMapper implements RowMapper<OAuth2Authorization> {
+		private final RegisteredClientRepository registeredClientRepository;
+		private LobHandler lobHandler = new DefaultLobHandler();
+		private ObjectMapper objectMapper = new ObjectMapper();
+
+		public OAuth2AuthorizationRowMapper(RegisteredClientRepository registeredClientRepository) {
+			Assert.notNull(registeredClientRepository, "registeredClientRepository cannot be null");
+			this.registeredClientRepository = registeredClientRepository;
+
+			ClassLoader classLoader = JdbcOAuth2AuthorizationService.class.getClassLoader();
+			List<Module> securityModules = SecurityJackson2Modules.getModules(classLoader);
+			this.objectMapper.registerModules(securityModules);
+			this.objectMapper.registerModule(new OAuth2AuthorizationServerJackson2Module());
+		}
+
+		@Override
+		@SuppressWarnings("unchecked")
+		public OAuth2Authorization mapRow(ResultSet rs, int rowNum) throws SQLException {
+			String registeredClientId = rs.getString("registered_client_id");
+			RegisteredClient registeredClient = this.registeredClientRepository.findById(registeredClientId);
+			if (registeredClient == null) {
+				throw new DataRetrievalFailureException(
+						"The RegisteredClient with id '" + registeredClientId + "' was not found in the RegisteredClientRepository.");
+			}
+
+			OAuth2Authorization.Builder builder = OAuth2Authorization.withRegisteredClient(registeredClient);
+			String id = rs.getString("id");
+			String principalName = rs.getString("principal_name");
+			String authorizationGrantType = rs.getString("authorization_grant_type");
+			Map<String, Object> attributes = parseMap(rs.getString("attributes"));
+
+			builder.id(id)
+					.principalName(principalName)
+					.authorizationGrantType(new AuthorizationGrantType(authorizationGrantType))
+					.attributes((attrs) -> attrs.putAll(attributes));
+
+			String state = rs.getString("state");
+			if (StringUtils.hasText(state)) {
+				builder.attribute(OAuth2ParameterNames.STATE, state);
+			}
+
+			String tokenValue;
+			Instant tokenIssuedAt;
+			Instant tokenExpiresAt;
+			byte[] authorizationCodeValue = this.lobHandler.getBlobAsBytes(rs, "authorization_code_value");
+
+			if (authorizationCodeValue != null) {
+				tokenValue = new String(authorizationCodeValue, StandardCharsets.UTF_8);
+				tokenIssuedAt = rs.getTimestamp("authorization_code_issued_at").toInstant();
+				tokenExpiresAt = rs.getTimestamp("authorization_code_expires_at").toInstant();
+				Map<String, Object> authorizationCodeMetadata = parseMap(rs.getString("authorization_code_metadata"));
+
+				OAuth2AuthorizationCode authorizationCode = new OAuth2AuthorizationCode(
+						tokenValue, tokenIssuedAt, tokenExpiresAt);
+				builder.token(authorizationCode, (metadata) -> metadata.putAll(authorizationCodeMetadata));
+			}
+
+			byte[] accessTokenValue = this.lobHandler.getBlobAsBytes(rs, "access_token_value");
+			if (accessTokenValue != null) {
+				tokenValue = new String(accessTokenValue, StandardCharsets.UTF_8);
+				tokenIssuedAt = rs.getTimestamp("access_token_issued_at").toInstant();
+				tokenExpiresAt = rs.getTimestamp("access_token_expires_at").toInstant();
+				Map<String, Object> accessTokenMetadata = parseMap(rs.getString("access_token_metadata"));
+				OAuth2AccessToken.TokenType tokenType = null;
+				if (OAuth2AccessToken.TokenType.BEARER.getValue().equalsIgnoreCase(rs.getString("access_token_type"))) {
+					tokenType = OAuth2AccessToken.TokenType.BEARER;
+				}
+
+				Set<String> scopes = Collections.emptySet();
+				String accessTokenScopes = rs.getString("access_token_scopes");
+				if (accessTokenScopes != null) {
+					scopes = StringUtils.commaDelimitedListToSet(accessTokenScopes);
+				}
+				OAuth2AccessToken accessToken = new OAuth2AccessToken(tokenType, tokenValue, tokenIssuedAt, tokenExpiresAt, scopes);
+				builder.token(accessToken, (metadata) -> metadata.putAll(accessTokenMetadata));
+			}
+
+			byte[] oidcIdTokenValue = this.lobHandler.getBlobAsBytes(rs, "oidc_id_token_value");
+			if (oidcIdTokenValue != null) {
+				tokenValue = new String(oidcIdTokenValue, StandardCharsets.UTF_8);
+				tokenIssuedAt = rs.getTimestamp("oidc_id_token_issued_at").toInstant();
+				tokenExpiresAt = rs.getTimestamp("oidc_id_token_expires_at").toInstant();
+				Map<String, Object> oidcTokenMetadata = parseMap(rs.getString("oidc_id_token_metadata"));
+
+				OidcIdToken oidcToken = new OidcIdToken(
+						tokenValue, tokenIssuedAt, tokenExpiresAt, (Map<String, Object>) oidcTokenMetadata.get(OAuth2Authorization.Token.CLAIMS_METADATA_NAME));
+				builder.token(oidcToken, (metadata) -> metadata.putAll(oidcTokenMetadata));
+			}
+
+			byte[] refreshTokenValue = this.lobHandler.getBlobAsBytes(rs, "refresh_token_value");
+			if (refreshTokenValue != null) {
+				tokenValue = new String(refreshTokenValue, StandardCharsets.UTF_8);
+				tokenIssuedAt = rs.getTimestamp("refresh_token_issued_at").toInstant();
+				tokenExpiresAt = null;
+				Timestamp refreshTokenExpiresAt = rs.getTimestamp("refresh_token_expires_at");
+				if (refreshTokenExpiresAt != null) {
+					tokenExpiresAt = refreshTokenExpiresAt.toInstant();
+				}
+				Map<String, Object> refreshTokenMetadata = parseMap(rs.getString("refresh_token_metadata"));
+
+				OAuth2RefreshToken refreshToken = new OAuth2RefreshToken(
+						tokenValue, tokenIssuedAt, tokenExpiresAt);
+				builder.token(refreshToken, (metadata) -> metadata.putAll(refreshTokenMetadata));
+			}
+			return builder.build();
+		}
+
+		public final void setLobHandler(LobHandler lobHandler) {
+			Assert.notNull(lobHandler, "lobHandler cannot be null");
+			this.lobHandler = lobHandler;
+		}
+
+		public final void setObjectMapper(ObjectMapper objectMapper) {
+			Assert.notNull(objectMapper, "objectMapper cannot be null");
+			this.objectMapper = objectMapper;
+		}
+
+		protected final RegisteredClientRepository getRegisteredClientRepository() {
+			return this.registeredClientRepository;
+		}
+
+		protected final LobHandler getLobHandler() {
+			return this.lobHandler;
+		}
+
+		protected final ObjectMapper getObjectMapper() {
+			return this.objectMapper;
+		}
+
+		private Map<String, Object> parseMap(String data) {
+			try {
+				return this.objectMapper.readValue(data, new TypeReference<Map<String, Object>>() {});
+			} catch (Exception ex) {
+				throw new IllegalArgumentException(ex.getMessage(), ex);
+			}
+		}
+
+	}
+
+	/**
+	 * The default {@code Function} that maps {@link OAuth2Authorization} to a
+	 * {@code List} of {@link SqlParameterValue}.
+	 */
+	public static class OAuth2AuthorizationParametersMapper implements Function<OAuth2Authorization, List<SqlParameterValue>> {
+		private ObjectMapper objectMapper = new ObjectMapper();
+
+		public OAuth2AuthorizationParametersMapper() {
+			ClassLoader classLoader = JdbcOAuth2AuthorizationService.class.getClassLoader();
+			List<Module> securityModules = SecurityJackson2Modules.getModules(classLoader);
+			this.objectMapper.registerModules(securityModules);
+			this.objectMapper.registerModule(new OAuth2AuthorizationServerJackson2Module());
+		}
+
+		@Override
+		public List<SqlParameterValue> apply(OAuth2Authorization authorization) {
+			List<SqlParameterValue> parameters = new ArrayList<>();
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorization.getId()));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorization.getRegisteredClientId()));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorization.getPrincipalName()));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, authorization.getAuthorizationGrantType().getValue()));
+
+			String attributes = writeMap(authorization.getAttributes());
+			parameters.add(new SqlParameterValue(Types.VARCHAR, attributes));
+
+			String state = null;
+			String authorizationState = authorization.getAttribute(OAuth2ParameterNames.STATE);
+			if (StringUtils.hasText(authorizationState)) {
+				state = authorizationState;
+			}
+			parameters.add(new SqlParameterValue(Types.VARCHAR, state));
+
+			OAuth2Authorization.Token<OAuth2AuthorizationCode> authorizationCode =
+					authorization.getToken(OAuth2AuthorizationCode.class);
+			List<SqlParameterValue> authorizationCodeSqlParameters = toSqlParameterList(authorizationCode);
+			parameters.addAll(authorizationCodeSqlParameters);
+
+			OAuth2Authorization.Token<OAuth2AccessToken> accessToken =
+					authorization.getToken(OAuth2AccessToken.class);
+			List<SqlParameterValue> accessTokenSqlParameters = toSqlParameterList(accessToken);
+			parameters.addAll(accessTokenSqlParameters);
+			String accessTokenType = null;
+			String accessTokenScopes = null;
+			if (accessToken != null) {
+				accessTokenType = accessToken.getToken().getTokenType().getValue();
+				if (!CollectionUtils.isEmpty(accessToken.getToken().getScopes())) {
+					accessTokenScopes = StringUtils.collectionToDelimitedString(accessToken.getToken().getScopes(), ",");
+				}
+			}
+			parameters.add(new SqlParameterValue(Types.VARCHAR, accessTokenType));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, accessTokenScopes));
+
+			OAuth2Authorization.Token<OidcIdToken> oidcIdToken = authorization.getToken(OidcIdToken.class);
+			List<SqlParameterValue> oidcIdTokenSqlParameters = toSqlParameterList(oidcIdToken);
+			parameters.addAll(oidcIdTokenSqlParameters);
+
+			OAuth2Authorization.Token<OAuth2RefreshToken> refreshToken = authorization.getRefreshToken();
+			List<SqlParameterValue> refreshTokenSqlParameters = toSqlParameterList(refreshToken);
+			parameters.addAll(refreshTokenSqlParameters);
+			return parameters;
+		}
+
+		public final void setObjectMapper(ObjectMapper objectMapper) {
+			Assert.notNull(objectMapper, "objectMapper cannot be null");
+			this.objectMapper = objectMapper;
+		}
+
+		protected final ObjectMapper getObjectMapper() {
+			return this.objectMapper;
+		}
+
+		private <T extends AbstractOAuth2Token> List<SqlParameterValue> toSqlParameterList(OAuth2Authorization.Token<T> token) {
+			List<SqlParameterValue> parameters = new ArrayList<>();
+			byte[] tokenValue = null;
+			Timestamp tokenIssuedAt = null;
+			Timestamp tokenExpiresAt = null;
+			String metadata = null;
+			if (token != null) {
+				tokenValue = token.getToken().getTokenValue().getBytes(StandardCharsets.UTF_8);
+				if (token.getToken().getIssuedAt() != null) {
+					tokenIssuedAt = Timestamp.from(token.getToken().getIssuedAt());
+				}
+				if (token.getToken().getExpiresAt() != null) {
+					tokenExpiresAt = Timestamp.from(token.getToken().getExpiresAt());
+				}
+				metadata = writeMap(token.getMetadata());
+			}
+			parameters.add(new SqlParameterValue(Types.BLOB, tokenValue));
+			parameters.add(new SqlParameterValue(Types.TIMESTAMP, tokenIssuedAt));
+			parameters.add(new SqlParameterValue(Types.TIMESTAMP, tokenExpiresAt));
+			parameters.add(new SqlParameterValue(Types.VARCHAR, metadata));
+			return parameters;
+		}
+
+		private String writeMap(Map<String, Object> data) {
+			try {
+				return this.objectMapper.writeValueAsString(data);
+			} catch (Exception ex) {
+				throw new IllegalArgumentException(ex.getMessage(), ex);
+			}
+		}
+
+	}
+
+	private static final class LobCreatorArgumentPreparedStatementSetter extends ArgumentPreparedStatementSetter {
+		private final LobCreator lobCreator;
+
+		private LobCreatorArgumentPreparedStatementSetter(LobCreator lobCreator, Object[] args) {
+			super(args);
+			this.lobCreator = lobCreator;
+		}
+
+		@Override
+		protected void doSetValue(PreparedStatement ps, int parameterPosition, Object argValue) throws SQLException {
+			if (argValue instanceof SqlParameterValue) {
+				SqlParameterValue paramValue = (SqlParameterValue) argValue;
+				if (paramValue.getSqlType() == Types.BLOB) {
+					if (paramValue.getValue() != null) {
+						Assert.isInstanceOf(byte[].class, paramValue.getValue(),
+								"Value of blob parameter must be byte[]");
+					}
+					byte[] valueBytes = (byte[]) paramValue.getValue();
+					this.lobCreator.setBlobAsBytes(ps, parameterPosition, valueBytes);
+					return;
+				}
+			}
+			super.doSetValue(ps, parameterPosition, argValue);
+		}
+
+	}
+
+}