JAVA-8282: Moved 5 articles from core-java-security-2 module to new
module core-java-security-algorithms
This commit is contained in:
sampadawagde
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package com.baeldung.aes;
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import org.assertj.core.api.WithAssertions;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import javax.crypto.SealedObject;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.BadPaddingException;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.NoSuchPaddingException;
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import java.io.File;
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import java.io.IOException;
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import java.nio.file.Paths;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidKeyException;
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import java.security.NoSuchAlgorithmException;
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import java.security.spec.InvalidKeySpecException;
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class AESUtilUnitTest implements WithAssertions {
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@Test
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void givenString_whenEncrypt_thenSuccess()
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throws NoSuchAlgorithmException, IllegalBlockSizeException, InvalidKeyException,
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BadPaddingException, InvalidAlgorithmParameterException, NoSuchPaddingException {
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// given
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String input = "baeldung";
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SecretKey key = AESUtil.generateKey(128);
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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String algorithm = "AES/CBC/PKCS5Padding";
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// when
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String cipherText = AESUtil.encrypt(algorithm, input, key, ivParameterSpec);
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String plainText = AESUtil.decrypt(algorithm, cipherText, key, ivParameterSpec);
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// then
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Assertions.assertEquals(input, plainText);
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}
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@Test
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void givenFile_whenEncrypt_thenSuccess()
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throws NoSuchAlgorithmException, IOException, IllegalBlockSizeException, InvalidKeyException,
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BadPaddingException, InvalidAlgorithmParameterException, NoSuchPaddingException {
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// given
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SecretKey key = AESUtil.generateKey(128);
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String algorithm = "AES/CBC/PKCS5Padding";
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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File inputFile = Paths.get("src/test/resources/baeldung.txt")
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.toFile();
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File encryptedFile = new File("classpath:baeldung.encrypted");
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File decryptedFile = new File("document.decrypted");
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// when
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AESUtil.encryptFile(algorithm, key, ivParameterSpec, inputFile, encryptedFile);
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AESUtil.decryptFile(algorithm, key, ivParameterSpec, encryptedFile, decryptedFile);
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// then
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assertThat(inputFile).hasSameTextualContentAs(decryptedFile);
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encryptedFile.delete();
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decryptedFile.delete();
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}
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@Test
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void givenObject_whenEncrypt_thenSuccess()
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throws NoSuchAlgorithmException, IllegalBlockSizeException, InvalidKeyException,
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InvalidAlgorithmParameterException, NoSuchPaddingException, IOException, BadPaddingException,
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ClassNotFoundException {
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// given
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Student student = new Student("Baeldung", 20);
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SecretKey key = AESUtil.generateKey(128);
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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String algorithm = "AES/CBC/PKCS5Padding";
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// when
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SealedObject sealedObject = AESUtil.encryptObject(algorithm, student, key, ivParameterSpec);
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Student object = (Student) AESUtil.decryptObject(algorithm, sealedObject, key, ivParameterSpec);
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// then
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assertThat(student).isEqualTo(object);
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}
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@Test
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void givenPassword_whenEncrypt_thenSuccess()
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throws InvalidKeySpecException, NoSuchAlgorithmException, IllegalBlockSizeException,
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InvalidKeyException, BadPaddingException, InvalidAlgorithmParameterException, NoSuchPaddingException {
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// given
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String plainText = "www.baeldung.com";
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String password = "baeldung";
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String salt = "12345678";
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IvParameterSpec ivParameterSpec = AESUtil.generateIv();
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SecretKey key = AESUtil.getKeyFromPassword(password, salt);
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// when
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String cipherText = AESUtil.encryptPasswordBased(plainText, key, ivParameterSpec);
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String decryptedCipherText = AESUtil.decryptPasswordBased(cipherText, key, ivParameterSpec);
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// then
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Assertions.assertEquals(plainText, decryptedCipherText);
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}
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}
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@@ -0,0 +1,35 @@
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package com.baeldung.cipher;
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import org.junit.jupiter.api.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.security.Provider;
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import java.security.Security;
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import java.util.Arrays;
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import java.util.List;
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import java.util.stream.Collectors;
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public class AvailableCiphersUnitTest {
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private final Logger logger = LoggerFactory.getLogger(AvailableCiphersUnitTest.class);
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@Test
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public void whenGetServices_thenGetAllCipherAlgorithms() {
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for (Provider provider : Security.getProviders()) {
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for (Provider.Service service : provider.getServices()) {
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logger.info(service.getAlgorithm());
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}
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}
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}
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@Test
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public void whenGetServicesWithFilter_thenGetAllCompatibleCipherAlgorithms() {
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List<String> algorithms = Arrays.stream(Security.getProviders())
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.flatMap(provider -> provider.getServices().stream())
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.filter(service -> "Cipher".equals(service.getType()))
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.map(Provider.Service::getAlgorithm)
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.collect(Collectors.toList());
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algorithms.forEach(logger::info);
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}
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}
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@@ -0,0 +1,90 @@
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package com.baeldung.des;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import javax.crypto.Cipher;
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import javax.crypto.spec.IvParameterSpec;
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import javax.crypto.spec.SecretKeySpec;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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public class TripleDESUnitTest {
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@Test
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public void given3DesKey_whenEncryptAndDecryptString_thenCompareResults() throws Exception {
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byte[] secretKey = "9mng65v8jf4lxn93nabf981m".getBytes();
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byte[] iv = "a76nb5h9".getBytes();
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String secretMessage = "Baeldung secret message";
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SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, "DESede");
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IvParameterSpec ivSpec = new IvParameterSpec(iv);
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Cipher encryptCipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
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encryptCipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
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byte[] secretMessagesBytes = secretMessage.getBytes(StandardCharsets.UTF_8);
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byte[] encryptedMessageBytes = encryptCipher.doFinal(secretMessagesBytes);
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Cipher decryptCipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
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decryptCipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
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byte[] decryptedMessageBytes = decryptCipher.doFinal(encryptedMessageBytes);
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String decryptedMessage = new String(decryptedMessageBytes, StandardCharsets.UTF_8);
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Assertions.assertEquals(secretMessage, decryptedMessage);
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}
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@Test
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public void given3DesKey_whenEncryptAndDecryptFile_thenCompareResults() throws Exception {
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byte[] secretKey = "9mng65v8jf4lxn93nabf981m".getBytes();
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byte[] iv = "a76nb5h9".getBytes();
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SecretKeySpec secretKeySpec = new SecretKeySpec(secretKey, "DESede");
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IvParameterSpec ivSpec = new IvParameterSpec(iv);
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String originalContent = "some secret message";
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Path tempFile = Files.createTempFile("temp", "txt");
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writeString(tempFile, originalContent);
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byte[] fileBytes = Files.readAllBytes(tempFile);
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Cipher encryptCipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
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encryptCipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, ivSpec);
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byte[] encryptedFileBytes = encryptCipher.doFinal(fileBytes);
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try (FileOutputStream stream = new FileOutputStream(tempFile.toFile())) {
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stream.write(encryptedFileBytes);
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}
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encryptedFileBytes = Files.readAllBytes(tempFile);
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Cipher decryptCipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
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decryptCipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivSpec);
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byte[] decryptedFileBytes = decryptCipher.doFinal(encryptedFileBytes);
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try (FileOutputStream stream = new FileOutputStream(tempFile.toFile())) {
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stream.write(decryptedFileBytes);
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}
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String fileContent = readString(tempFile);
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Assertions.assertEquals(originalContent, fileContent);
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}
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private void writeString(Path path, String content) throws Exception {
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try (BufferedWriter writer = Files.newBufferedWriter(path)) {
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writer.write(content);
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}
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}
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private String readString(Path path) throws Exception {
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StringBuilder resultStringBuilder = new StringBuilder();
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try (BufferedReader br = new BufferedReader(new FileReader(path.toFile()))) {
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String line;
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while ((line = br.readLine()) != null) {
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resultStringBuilder.append(line);
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}
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}
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return resultStringBuilder.toString();
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}
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}
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@@ -0,0 +1,92 @@
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package com.baeldung.rsa;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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import javax.crypto.Cipher;
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import java.io.BufferedReader;
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import java.io.BufferedWriter;
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import java.io.FileOutputStream;
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import java.io.FileReader;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.security.KeyPair;
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import java.security.KeyPairGenerator;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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public class RsaUnitTest {
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@Test
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public void givenRsaKeyPair_whenEncryptAndDecryptString_thenCompareResults() throws Exception {
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KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
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generator.initialize(2048);
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KeyPair pair = generator.generateKeyPair();
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PrivateKey privateKey = pair.getPrivate();
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PublicKey publicKey = pair.getPublic();
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String secretMessage = "Baeldung secret message";
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Cipher encryptCipher = Cipher.getInstance("RSA");
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encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey);
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byte[] secretMessageBytes = secretMessage.getBytes(StandardCharsets.UTF_8);
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byte[] encryptedMessageBytes = encryptCipher.doFinal(secretMessageBytes);
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Cipher decryptCipher = Cipher.getInstance("RSA");
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decryptCipher.init(Cipher.DECRYPT_MODE, privateKey);
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byte[] decryptedMessageBytes = decryptCipher.doFinal(encryptedMessageBytes);
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String decryptedMessage = new String(decryptedMessageBytes, StandardCharsets.UTF_8);
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Assertions.assertEquals(secretMessage, decryptedMessage);
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}
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@Test
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public void givenRsaKeyPair_whenEncryptAndDecryptFile_thenCompareResults() throws Exception {
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KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA");
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generator.initialize(2048);
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KeyPair pair = generator.generateKeyPair();
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PrivateKey privateKey = pair.getPrivate();
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PublicKey publicKey = pair.getPublic();
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String originalContent = "some secret message";
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Path tempFile = Files.createTempFile("temp", "txt");
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writeString(tempFile, originalContent);
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byte[] fileBytes = Files.readAllBytes(tempFile);
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Cipher encryptCipher = Cipher.getInstance("RSA");
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encryptCipher.init(Cipher.ENCRYPT_MODE, publicKey);
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byte[] encryptedFileBytes = encryptCipher.doFinal(fileBytes);
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try (FileOutputStream stream = new FileOutputStream(tempFile.toFile())) {
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stream.write(encryptedFileBytes);
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}
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encryptedFileBytes = Files.readAllBytes(tempFile);
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Cipher decryptCipher = Cipher.getInstance("RSA");
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decryptCipher.init(Cipher.DECRYPT_MODE, privateKey);
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byte[] decryptedFileBytes = decryptCipher.doFinal(encryptedFileBytes);
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try (FileOutputStream stream = new FileOutputStream(tempFile.toFile())) {
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stream.write(decryptedFileBytes);
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}
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String fileContent = readString(tempFile);
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Assertions.assertEquals(originalContent, fileContent);
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}
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private void writeString(Path path, String content) throws Exception {
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try (BufferedWriter writer = Files.newBufferedWriter(path)) {
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writer.write(content);
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}
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}
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private String readString(Path path) throws Exception {
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StringBuilder resultStringBuilder = new StringBuilder();
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try (BufferedReader br = new BufferedReader(new FileReader(path.toFile()))) {
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String line;
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while ((line = br.readLine()) != null) {
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resultStringBuilder.append(line);
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}
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}
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return resultStringBuilder.toString();
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}
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}
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