Modify 비밀키 환경변수로 숨김 처리

src/main/java/com/example/springsecuritystudy/config/SecurityConfig.java

@@ -19,6 +19,7 @@ import com.example.springsecuritystudy.filter.StopwatchFilter;
 import com.example.springsecuritystudy.jwt.JwtAuthenticationFilter;
 import com.example.springsecuritystudy.jwt.JwtAuthorizationFilter;
 import com.example.springsecuritystudy.jwt.JwtProperties;
+import com.example.springsecuritystudy.jwt.JwtUtils;
 import com.example.springsecuritystudy.user.UserRepository;
 
 import lombok.RequiredArgsConstructor;
@@ -31,6 +32,7 @@ import lombok.RequiredArgsConstructor;
 public class SecurityConfig {
 
 	private final UserRepository userRepository;
+	private final JwtUtils jwtUtils;
 
 	@Bean
 	public AuthenticationManager authenticationManager(AuthenticationConfiguration authenticationConfiguration) throws Exception {
@@ -47,10 +49,11 @@ public class SecurityConfig {
 		);
 		// JWT filter
 		http.addFilterBefore(
-				new JwtAuthenticationFilter(authenticationManager(http.getSharedObject(AuthenticationConfiguration.class))),
+				new JwtAuthenticationFilter(authenticationManager(http.getSharedObject(AuthenticationConfiguration.class))
+						, jwtUtils),
 				UsernamePasswordAuthenticationFilter.class
 		).addFilterBefore(
-				new JwtAuthorizationFilter(userRepository),
+				new JwtAuthorizationFilter(userRepository, jwtUtils),
 				BasicAuthenticationFilter.class
 		);
 		http

src/main/java/com/example/springsecuritystudy/jwt/JwtAuthenticationFilter.java

@@ -19,9 +19,12 @@ import com.example.springsecuritystudy.user.User;
 
 public class JwtAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
 
+	private final JwtUtils jwtUtils;
+
 	public JwtAuthenticationFilter(
-			AuthenticationManager authenticationManager) {
+			AuthenticationManager authenticationManager, JwtUtils jwtUtils) {
 		super(authenticationManager);
+		this.jwtUtils = jwtUtils;
 	}
 
 	/**
@@ -46,7 +49,7 @@ public class JwtAuthenticationFilter extends UsernamePasswordAuthenticationFilte
 	protected void successfulAuthentication(HttpServletRequest request, HttpServletResponse response, FilterChain chain,
 			Authentication authResult) throws IOException, ServletException {
 		User user = (User)authResult.getPrincipal();
-		String token = JwtUtils.createToken(user);
+		String token = jwtUtils.createToken(user);
 		// 쿠키 생성
 		Cookie cookie = new Cookie(JwtProperties.COOKIE_NAME, token);
 		cookie.setMaxAge(JwtProperties.EXPIRATION_TIME); // 쿠키 만료 시간

src/main/java/com/example/springsecuritystudy/jwt/JwtAuthorizationFilter.java

@@ -18,16 +18,17 @@ import com.example.springsecuritystudy.common.UserNotFoundException;
 import com.example.springsecuritystudy.user.User;
 import com.example.springsecuritystudy.user.UserRepository;
 
+import lombok.RequiredArgsConstructor;
+
 /**
  * JWT를 이용한 인증
  */
+@RequiredArgsConstructor
 public class JwtAuthorizationFilter extends OncePerRequestFilter {
 
 	private final UserRepository userRepository;
+	private final JwtUtils jwtUtils;
 
-	public JwtAuthorizationFilter(UserRepository userRepository) {
-		this.userRepository = userRepository;
-	}
 
 	@Override
 	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
@@ -55,7 +56,7 @@ public class JwtAuthorizationFilter extends OncePerRequestFilter {
 	}
 
 	private Authentication getUsernamePasswordAuthenticationToken(String token) {
-		String username = JwtUtils.getUsername(token);
+		String username = jwtUtils.getUsername(token);
 		if (username != null) {
 			User user = userRepository.findByUsername(username).orElseThrow(UserNotFoundException::new);
 			return new UsernamePasswordAuthenticationToken(

src/main/java/com/example/springsecuritystudy/jwt/JwtKey.java

@@ -6,6 +6,11 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Random;
 
+import javax.annotation.PostConstruct;
+
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+
 import io.jsonwebtoken.security.Keys;
 import javafx.util.Pair;
 
@@ -13,27 +18,39 @@ import javafx.util.Pair;
  * JWT Key를 제공하고 조회한다.
  * Key Rolling을 지원한다.
  */
+@Component
 public class JwtKey {
-	/**
-	 * Kid-Key List 외부로 절대 유출되어서는 안된다.
-	 */
-	private static final Map<String, String> SECRET_KEY_SET = new HashMap<String, String>() {
-		{
-			put("key1", "SpringSecurityJWTPracticeProjectIsSoGoodAndThisProjectIsSoFunSpringSecurityJWTPracticeProjectIsSoGoodAndThisProjectIsSoFun");
-			put("key2", "GoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurity");
-			put("key3", "HelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurity");
-		}
-	};
 
-	private static final String[] KID_SET = SECRET_KEY_SET.keySet().toArray(new String[0]);
+	private final Environment env;
-	private static Random randomIndex = new Random();
+
+	public JwtKey(Environment env) {
+		this.env = env;
+	}
+
+	private Map<String, String> SECRET_KEY_SET;
+	private String[] KID_SET;
+	private Random randomIndex;
+
+
+	@PostConstruct
+	public void init() {
+		SECRET_KEY_SET = new HashMap<String, String>() {
+			{
+				put("key1", env.getProperty("jwt.secret-key1"));
+				put("key2", env.getProperty("jwt.secret-key2"));
+				put("key3", env.getProperty("jwt.secret-key3"));
+			}
+		};
+		KID_SET = SECRET_KEY_SET.keySet().toArray(new String[0]);
+		randomIndex = new Random();
+	}
 
 	/**
 	 * SECRET_KEY_SET 에서 랜덤한 KEY 가져오기
 	 *
 	 * @return kid와 key Pair
 	 */
-	public static Pair<String, Key> getRandomKey() {
+	public Pair<String, Key> getRandomKey() {
 		String kid = KID_SET[randomIndex.nextInt(KID_SET.length)];
 		String secretKey = SECRET_KEY_SET.get(kid);
 		return new Pair<>(kid, Keys.hmacShaKeyFor(secretKey.getBytes(StandardCharsets.UTF_8)));
@@ -45,7 +62,7 @@ public class JwtKey {
 	 * @param kid kid
 	 * @return Key
 	 */
-	public static Key getKey(String kid) {
+	public Key getKey(String kid) {
 		String key = SECRET_KEY_SET.getOrDefault(kid, null);
 		if (key == null) {
 			return null;

src/main/java/com/example/springsecuritystudy/jwt/JwtUtils.java

@@ -3,24 +3,31 @@ package com.example.springsecuritystudy.jwt;
 import java.security.Key;
 import java.util.Date;
 
+import org.springframework.stereotype.Component;
+
 import com.example.springsecuritystudy.user.User;
 
 import io.jsonwebtoken.Claims;
 import io.jsonwebtoken.JwsHeader;
 import io.jsonwebtoken.Jwts;
 import javafx.util.Pair;
+import lombok.RequiredArgsConstructor;
 
+@Component
+@RequiredArgsConstructor
 public class JwtUtils {
+	private final JwtKey jwtKey;
+
 	/**
 	 * 토큰에서 username 찾기
 	 *
 	 * @param token 토큰
 	 * @return username
 	 */
-	public static String getUsername(String token) {
+	public String getUsername(String token) {
 		// jwtToken에서 username을 찾는다.
 		return Jwts.parserBuilder()
-				.setSigningKeyResolver(SigningKeyResolver.instance)
+				.setSigningKeyResolver(new SigningKeyResolver(jwtKey))
 				.build()
 				.parseClaimsJws(token)
 				.getBody()
@@ -36,10 +43,10 @@ public class JwtUtils {
 	 * @param user 유저
 	 * @return jwt token
 	 */
-	public static String createToken(User user) {
+	public String createToken(User user) {
 		Claims claims = Jwts.claims().setSubject(user.getUsername());
 		Date now = new Date();
-		Pair<String, Key> key = JwtKey.getRandomKey();
+		Pair<String, Key> key = jwtKey.getRandomKey();
 		return Jwts.builder()
 				.setClaims(claims) // 토큰에 담을 정보 설정
 				.setIssuedAt(now) // 토큰 발행 시간 설정

src/main/java/com/example/springsecuritystudy/jwt/SigningKeyResolver.java

@@ -5,18 +5,20 @@ import java.security.Key;
 import io.jsonwebtoken.Claims;
 import io.jsonwebtoken.JwsHeader;
 import io.jsonwebtoken.SigningKeyResolverAdapter;
+import lombok.RequiredArgsConstructor;
 
 /**
  * JwsHeader를 통해 Signature 검증에 필요한 Key를 가져오는 코드를 구현합니다.
  */
+@RequiredArgsConstructor
 public class SigningKeyResolver extends SigningKeyResolverAdapter {
-	public static SigningKeyResolver instance = new SigningKeyResolver();
+	private final JwtKey jwtKey;
 
 	@Override
 	public Key resolveSigningKey(JwsHeader jwsHeader, Claims claims) {
 		String kid = jwsHeader.getKeyId();
 		if (kid == null)
 			return null;
-		return JwtKey.getKey(kid);
+		return jwtKey.getKey(kid);
 	}
 }

src/main/resources/application-local.yml

@@ -13,3 +13,10 @@ spring:
   jpa:
     database-platform: org.hibernate.dialect.H2Dialect
     show-sql: true
+
+jwt:
+  secret-key1: SpringSecurityJWTPracticeProjectIsSoGoodAndThisProjectIsSoFunSpringSecurityJWTPracticeProjectIsSoGoodAndThisProjectIsSoFun
+  secret-key2: GoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurityGoodSpringSecurityNiceSpringSecurity
+  secret-key3: HelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurityHelloSpringSecurity
+  expiration-time: 86400 #60 * 60 * 24
+  remember-me-expiration-time: 2592000 #60 * 60 * 24 * 30