optional and mandatory claims check

oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/JwtAudienceValidator.java

@@ -33,18 +33,29 @@ public final class JwtAudienceValidator implements OAuth2TokenValidator<Jwt> {
 	private final JwtClaimValidator<Collection<String>> validator;
 
 	/**
-	 * Constructs a {@link JwtAudienceValidator} using the provided parameters
+	 * Constructs a {@link JwtAudienceValidator} using the provided parameters with
+	 * {@link JwtClaimNames#ISS "iss"} claim is REQUIRED
 	 * @param audience - The audience that each {@link Jwt} should have.
 	 */
 	public JwtAudienceValidator(String audience) {
+		this(audience, true);
+	}
+
+	/**
+	 * Constructs a {@link JwtIssuerValidator} using the provided parameters
+	 * @param audience - The audience that each {@link Jwt} should have.
+	 * @param required -{@code true} if the {@link JwtClaimNames#AUD "aud"} claim is
+	 * REQUIRED in the {@link Jwt}, {@code false} otherwise
+	 */
+	public JwtAudienceValidator(String audience, boolean required) {
 		Assert.notNull(audience, "audience cannot be null");
 		this.validator = new JwtClaimValidator<>(JwtClaimNames.AUD,
-				(claimValue) -> (claimValue != null) && claimValue.contains(audience));
+				(claimValue) -> (claimValue != null) ? claimValue.contains(audience) : !required);
 	}
 
 	@Override
 	public OAuth2TokenValidatorResult validate(Jwt token) {
-		Assert.notNull(token, "token cannot be null");
+		Assert.notNull(token, "jwt cannot be null");
 		return this.validator.validate(token);
 	}
 

oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/JwtIssuerValidator.java

@@ -16,8 +16,6 @@
 
 package org.springframework.security.oauth2.jwt;
 
-import java.util.function.Predicate;
-
 import org.springframework.security.oauth2.core.OAuth2TokenValidator;
 import org.springframework.security.oauth2.core.OAuth2TokenValidatorResult;
 import org.springframework.util.Assert;
@@ -33,19 +31,29 @@ public final class JwtIssuerValidator implements OAuth2TokenValidator<Jwt> {
 	private final JwtClaimValidator<Object> validator;
 
 	/**
-	 * Constructs a {@link JwtIssuerValidator} using the provided parameters
+	 * Constructs a {@link JwtIssuerValidator} using the provided parameters with
+	 * {@link JwtClaimNames#ISS "iss"} claim is REQUIRED
 	 * @param issuer - The issuer that each {@link Jwt} should have.
 	 */
 	public JwtIssuerValidator(String issuer) {
-		Assert.notNull(issuer, "issuer cannot be null");
+		this(issuer, true);
+	}
 
-		Predicate<Object> testClaimValue = (claimValue) -> (claimValue != null) && issuer.equals(claimValue.toString());
-		this.validator = new JwtClaimValidator<>(JwtClaimNames.ISS, testClaimValue);
+	/**
+	 * Constructs a {@link JwtIssuerValidator} using the provided parameters
+	 * @param issuer - The issuer that each {@link Jwt} should have.
+	 * @param required -{@code true} if the {@link JwtClaimNames#ISS "iss"} claim is
+	 * REQUIRED in the {@link Jwt}, {@code false} otherwise
+	 */
+	public JwtIssuerValidator(String issuer, boolean required) {
+		Assert.notNull(issuer, "issuer cannot be null");
+		this.validator = new JwtClaimValidator<>(JwtClaimNames.ISS,
+				(claimValue) -> (claimValue != null) ? issuer.equals(claimValue.toString()) : !required);
 	}
 
 	@Override
 	public OAuth2TokenValidatorResult validate(Jwt token) {
-		Assert.notNull(token, "token cannot be null");
+		Assert.notNull(token, "jwt cannot be null");
 		return this.validator.validate(token);
 	}
 

oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/JwtTimestampValidator.java

@@ -52,6 +52,8 @@ public final class JwtTimestampValidator implements OAuth2TokenValidator<Jwt> {
 
 	private static final Duration DEFAULT_MAX_CLOCK_SKEW = Duration.of(60, ChronoUnit.SECONDS);
 
+	private final boolean required;
+
 	private final Duration clockSkew;
 
 	private Clock clock = Clock.systemUTC();
@@ -60,25 +62,38 @@ public final class JwtTimestampValidator implements OAuth2TokenValidator<Jwt> {
 	 * A basic instance with no custom verification and the default max clock skew
 	 */
 	public JwtTimestampValidator() {
-		this(DEFAULT_MAX_CLOCK_SKEW);
+		this(DEFAULT_MAX_CLOCK_SKEW, false);
+	}
+
+	public JwtTimestampValidator(boolean required) {
+		this(DEFAULT_MAX_CLOCK_SKEW, required);
 	}
 
 	public JwtTimestampValidator(Duration clockSkew) {
+		this(clockSkew, false);
+	}
+
+	public JwtTimestampValidator(Duration clockSkew, boolean required) {
 		Assert.notNull(clockSkew, "clockSkew cannot be null");
+		this.required = required;
 		this.clockSkew = clockSkew;
 	}
 
 	@Override
 	public OAuth2TokenValidatorResult validate(Jwt jwt) {
 		Assert.notNull(jwt, "jwt cannot be null");
 		Instant expiry = jwt.getExpiresAt();
+		Instant notBefore = jwt.getNotBefore();
+		if (this.required && !(expiry != null || notBefore != null)) {
+			OAuth2Error oAuth2Error = createOAuth2Error("exp and nbf are required");
+			return OAuth2TokenValidatorResult.failure(oAuth2Error);
+		}
 		if (expiry != null) {
 			if (Instant.now(this.clock).minus(this.clockSkew).isAfter(expiry)) {
 				OAuth2Error oAuth2Error = createOAuth2Error(String.format("Jwt expired at %s", jwt.getExpiresAt()));
 				return OAuth2TokenValidatorResult.failure(oAuth2Error);
 			}
 		}
-		Instant notBefore = jwt.getNotBefore();
 		if (notBefore != null) {
 			if (Instant.now(this.clock).plus(this.clockSkew).isBefore(notBefore)) {
 				OAuth2Error oAuth2Error = createOAuth2Error(String.format("Jwt used before %s", jwt.getNotBefore()));

oauth2/oauth2-jose/src/test/java/org/springframework/security/oauth2/jwt/JwtAudienceValidatorTests.java

@@ -31,27 +31,73 @@
  */
 class JwtAudienceValidatorTests {
 
-	private final JwtAudienceValidator validator = new JwtAudienceValidator("audience");
+	private final JwtAudienceValidator validatorDefault = new JwtAudienceValidator("audience");
+
+	private final JwtAudienceValidator validatorRequiredTrue = new JwtAudienceValidator("audience", true);
+
+	private final JwtAudienceValidator validatorRequiredFalse = new JwtAudienceValidator("audience", false);
+
+	@Test
+	void givenRequiredDefaultJwtWithMatchingAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(List.of("audience")).build();
+		OAuth2TokenValidatorResult result = this.validatorDefault.validate(jwt);
+		assertThat(result).isEqualTo(OAuth2TokenValidatorResult.success());
+	}
+
+	@Test
+	void givenRequiredJwtWithMatchingAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(List.of("audience")).build();
+		OAuth2TokenValidatorResult result = this.validatorRequiredTrue.validate(jwt);
+		assertThat(result).isEqualTo(OAuth2TokenValidatorResult.success());
+	}
 
 	@Test
-	void givenJwtWithMatchingAudienceThenShouldValidate() {
+	void givenNotRequiredJwtWithMatchingAudienceThenShouldValidate() {
 		Jwt jwt = TestJwts.jwt().audience(List.of("audience")).build();
-		OAuth2TokenValidatorResult result = this.validator.validate(jwt);
+		OAuth2TokenValidatorResult result = this.validatorRequiredFalse.validate(jwt);
 		assertThat(result).isEqualTo(OAuth2TokenValidatorResult.success());
 	}
 
 	@Test
-	void givenJwtWithoutMatchingAudienceThenShouldValidate() {
+	void givenRequiredDefaultJwtWithoutMatchingAudienceThenShouldValidate() {
 		Jwt jwt = TestJwts.jwt().audience(List.of("other")).build();
-		OAuth2TokenValidatorResult result = this.validator.validate(jwt);
+		OAuth2TokenValidatorResult result = this.validatorDefault.validate(jwt);
 		assertThat(result.hasErrors()).isTrue();
 	}
 
 	@Test
-	void givenJwtWithoutAudienceThenShouldValidate() {
+	void givenRequiredJwtWithoutMatchingAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(List.of("other")).build();
+		OAuth2TokenValidatorResult result = this.validatorRequiredTrue.validate(jwt);
+		assertThat(result.hasErrors()).isTrue();
+	}
+
+	@Test
+	void givenNotRequiredJwtWithoutMatchingAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(List.of("other")).build();
+		OAuth2TokenValidatorResult result = this.validatorRequiredFalse.validate(jwt);
+		assertThat(result.hasErrors()).isTrue();
+	}
+
+	@Test
+	void givenRequiredDefaultJwtWithoutAudienceThenShouldValidate() {
 		Jwt jwt = TestJwts.jwt().audience(null).build();
-		OAuth2TokenValidatorResult result = this.validator.validate(jwt);
+		OAuth2TokenValidatorResult result = this.validatorDefault.validate(jwt);
 		assertThat(result.hasErrors()).isTrue();
 	}
 
+	@Test
+	void givenRequiredJwtWithoutAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(null).build();
+		OAuth2TokenValidatorResult result = this.validatorRequiredTrue.validate(jwt);
+		assertThat(result.hasErrors()).isTrue();
+	}
+
+	@Test
+	void givenNotRequiredJwtWithoutAudienceThenShouldValidate() {
+		Jwt jwt = TestJwts.jwt().audience(null).build();
+		OAuth2TokenValidatorResult result = this.validatorRequiredFalse.validate(jwt);
+		assertThat(result.hasErrors()).isFalse();
+	}
+
 }