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.internals.secured;
  
  import org.apache.kafka.common.security.oauthbearer.JwtValidatorException;
  
  /**
   * SerializedJwt provides a modicum of structure and validation around a JWT's serialized form by
   * splitting and making the three sections (header, payload, and signature) available to the user.
   */
  
  public class SerializedJwt {
  
      private final String token;
  
      private final String header;
  
      private final String payload;
  
      private final String signature;
  
      public SerializedJwt(String token) {
          if (token == null)
              token = "";
          else
              token = token.trim();
  
          if (token.isEmpty())
              throw new JwtValidatorException("Malformed JWT provided; expected three sections (header, payload, and signature)");
  
          String[] splits = token.split("\\.");
  
          if (splits.length != 3)
              throw new JwtValidatorException("Malformed JWT provided; expected three sections (header, payload, and signature)");
  
          this.token = token.trim();
          this.header = validateSection(splits[0]);
          this.payload = validateSection(splits[1]);
          this.signature = validateSection(splits[2]);
      }
  
      /**
       * Returns the entire base 64-encoded JWT.
       *
       * @return JWT
       */
  
      public String getToken() {
          return token;
      }
  
      /**
       * Returns the first section--the JWT header--in its base 64-encoded form.
       *
       * @return Header section of the JWT
       */
  
      public String getHeader() {
          return header;
      }
  
      /**
       * Returns the second section--the JWT payload--in its base 64-encoded form.
       *
       * @return Payload section of the JWT
       */
  
      public String getPayload() {
          return payload;
      }
  
      /**
       * Returns the third section--the JWT signature--in its base 64-encoded form.
       *
       * @return Signature section of the JWT
       */
  
      public String getSignature() {
          return signature;
      }
  
      private String validateSection(String section) throws JwtValidatorException {
          section = section.trim();
  
          if (section.isEmpty())
              throw new JwtValidatorException("Malformed JWT provided; expected three sections (header, payload, and signature)");
  
          return section;
      }
  
  }
  