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.security.oauthbearer.internals.secured.AccessTokenBuilder;
  import org.apache.kafka.common.security.oauthbearer.internals.secured.OAuthBearerTest;
  
  import org.jose4j.jws.AlgorithmIdentifiers;
  import org.jose4j.jwx.HeaderParameterNames;
  import org.junit.jupiter.api.Test;
  import org.junit.jupiter.api.TestInstance;
  import org.junit.jupiter.api.TestInstance.Lifecycle;
  
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  @TestInstance(Lifecycle.PER_CLASS)
  public abstract class JwtValidatorTest extends OAuthBearerTest {
  
      protected abstract JwtValidator createJwtValidator(AccessTokenBuilder accessTokenBuilder) throws Exception;
  
      protected JwtValidator createJwtValidator() throws Exception {
          AccessTokenBuilder builder = new AccessTokenBuilder();
          return createJwtValidator(builder);
      }
  
      @Test
      public void testNull() throws Exception {
          JwtValidator validator = createJwtValidator();
          assertThrowsWithMessage(JwtValidatorException.class, () -> validator.validate(null), "Malformed JWT provided; expected three sections (header, payload, and signature)");
      }
  
      @Test
      public void testEmptyString() throws Exception {
          JwtValidator validator = createJwtValidator();
          assertThrowsWithMessage(JwtValidatorException.class, () -> validator.validate(""), "Malformed JWT provided; expected three sections (header, payload, and signature)");
      }
  
      @Test
      public void testWhitespace() throws Exception {
          JwtValidator validator = createJwtValidator();
          assertThrowsWithMessage(JwtValidatorException.class, () -> validator.validate("    "), "Malformed JWT provided; expected three sections (header, payload, and signature)");
      }
  
      @Test
      public void testEmptySections() throws Exception {
          JwtValidator validator = createJwtValidator();
          assertThrowsWithMessage(JwtValidatorException.class, () -> validator.validate(".."), "Malformed JWT provided; expected three sections (header, payload, and signature)");
      }
  
      @Test
      public void testMissingHeader() throws Exception {
          JwtValidator validator = createJwtValidator();
          String header = "";
          String payload = createBase64JsonJwtSection(node -> { });
          String signature = "";
          String accessToken = String.format("%s.%s.%s", header, payload, signature);
          assertThrows(JwtValidatorException.class, () -> validator.validate(accessToken));
      }
  
      @Test
      public void testMissingPayload() throws Exception {
          JwtValidator validator = createJwtValidator();
          String header = createBase64JsonJwtSection(node -> node.put(HeaderParameterNames.ALGORITHM, AlgorithmIdentifiers.NONE));
          String payload = "";
          String signature = "";
          String accessToken = String.format("%s.%s.%s", header, payload, signature);
          assertThrows(JwtValidatorException.class, () -> validator.validate(accessToken));
      }
  
      @Test
      public void testMissingSignature() throws Exception {
          JwtValidator validator = createJwtValidator();
          String header = createBase64JsonJwtSection(node -> node.put(HeaderParameterNames.ALGORITHM, AlgorithmIdentifiers.NONE));
          String payload = createBase64JsonJwtSection(node -> { });
          String signature = "";
          String accessToken = String.format("%s.%s.%s", header, payload, signature);
          assertThrows(JwtValidatorException.class, () -> validator.validate(accessToken));
      }
  
  }