content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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
   *
   *    http://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.apache.kafka.common.security.oauthbearer;
  
  import org.apache.kafka.common.config.SaslConfigs;
  import org.apache.kafka.common.security.oauthbearer.internals.secured.AccessTokenBuilder;
  import org.apache.kafka.common.security.oauthbearer.internals.secured.CloseableVerificationKeyResolver;
  
  import org.jose4j.jwk.PublicJsonWebKey;
  import org.jose4j.jws.AlgorithmIdentifiers;
  import org.jose4j.lang.InvalidAlgorithmException;
  import org.junit.jupiter.api.Test;
  
  import java.util.Map;
  
  import static org.apache.kafka.common.security.oauthbearer.OAuthBearerLoginModule.OAUTHBEARER_MECHANISM;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class BrokerJwtValidatorTest extends JwtValidatorTest {
  
      @Override
      protected JwtValidator createJwtValidator(AccessTokenBuilder builder) {
          CloseableVerificationKeyResolver resolver = (jws, nestingContext) -> builder.jwk().getKey();
          return new BrokerJwtValidator(resolver);
      }
  
      @Test
      public void testRsaEncryptionAlgorithm() throws Exception {
          PublicJsonWebKey jwk = createRsaJwk();
          testEncryptionAlgorithm(jwk, AlgorithmIdentifiers.RSA_USING_SHA256);
      }
  
      @Test
      public void testEcdsaEncryptionAlgorithm() throws Exception {
          PublicJsonWebKey jwk = createEcJwk();
          testEncryptionAlgorithm(jwk, AlgorithmIdentifiers.ECDSA_USING_P256_CURVE_AND_SHA256);
      }
  
      @Test
      public void testInvalidEncryptionAlgorithm() throws Exception {
          PublicJsonWebKey jwk = createRsaJwk();
  
          assertThrowsWithMessage(InvalidAlgorithmException.class,
              () -> testEncryptionAlgorithm(jwk, "fake"),
              "fake is an unknown, unsupported or unavailable alg algorithm");
      }
  
      @Test
      public void testMissingSubShouldBeValid() throws Exception {
          String subClaimName = "client_id";
          String subject = "otherSub";
          PublicJsonWebKey jwk = createRsaJwk();
          AccessTokenBuilder tokenBuilder = new AccessTokenBuilder()
              .jwk(jwk)
              .alg(AlgorithmIdentifiers.RSA_USING_SHA256)
              .addCustomClaim(subClaimName, subject)
              .subjectClaimName(subClaimName)
              .subject(null);
          JwtValidator validator = createJwtValidator(tokenBuilder);
          Map<String, ?> saslConfigs = getSaslConfigs(SaslConfigs.SASL_OAUTHBEARER_SUB_CLAIM_NAME, subClaimName);
          validator.configure(saslConfigs, OAUTHBEARER_MECHANISM, getJaasConfigEntries());
  
          // Validation should succeed (e.g. signature verification) even if sub claim is missing
          OAuthBearerToken token = validator.validate(tokenBuilder.build());
  
          assertEquals(subject, token.principalName());
      }
  
      private void testEncryptionAlgorithm(PublicJsonWebKey jwk, String alg) throws Exception {
          AccessTokenBuilder builder = new AccessTokenBuilder().jwk(jwk).alg(alg);
          JwtValidator validator = createJwtValidator(builder);
          validator.configure(getSaslConfigs(), OAUTHBEARER_MECHANISM, getJaasConfigEntries());
          String accessToken = builder.build();
          OAuthBearerToken token = validator.validate(accessToken);
  
          assertEquals(builder.subject(), token.principalName());
          assertEquals(builder.issuedAtSeconds() * 1000, token.startTimeMs());
          assertEquals(builder.expirationSeconds() * 1000, token.lifetimeMs());
          assertEquals(1, token.scope().size());
      }
  
  }
  