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 com.aliyun.oss.crypto;
  
  /**
   * EncryptionMaterials is an interface used to implement different
   * encrypt/decrypt content materials providers.
   */
  public interface EncryptionMaterials {
      /**
       * Encrypt the cek and iv and put the result into the given {@link ContentCryptoMaterialRW} instance.
       * 
       * @param  contentMaterial 
       *              The materials that contans the content crypto info.
       */
      public void encryptCEK(ContentCryptoMaterialRW contentMaterial);
  
      /**
       * Decrypt the secured cek and secured iv and put the result into the given {@link ContentCryptoMaterialRW} 
       * instance
       * 
       * @param  contentMaterial 
       *              The materials that contans the content crypto info.
       */
      public void decryptCEK(ContentCryptoMaterialRW contentMaterial);
  }