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.internal;
  
  import com.aliyun.oss.ClientException;
  import com.aliyun.oss.OSSEncryptionClient;
  import com.aliyun.oss.OSSException;
  import com.aliyun.oss.crypto.ContentCryptoMaterial;
  import com.aliyun.oss.crypto.ContentCryptoMaterialRW;
  import com.aliyun.oss.crypto.EncryptionMaterials;
  import com.aliyun.oss.crypto.MultipartUploadCryptoContext;
  import com.aliyun.oss.model.*;
  
  import java.io.*;
  
  /**
   * OSSUploadOperationEncrypted
   */
  public class OSSUploadOperationEncrypted extends OSSUploadOperation {
      private OSSEncryptionClient ossEncryptionClient;
      private EncryptionMaterials encryptionMaterials;
  
      public OSSUploadOperationEncrypted(OSSEncryptionClient ossEncryptionClient, EncryptionMaterials encryptionMaterials) {
          super(ossEncryptionClient.getMultipartOperation());
          this.ossEncryptionClient = ossEncryptionClient;
          this.encryptionMaterials = encryptionMaterials;
      }
  
      static class UploadCheckPointEncryption extends UploadCheckPoint {
          private MultipartUploadCryptoContext context;
  
          public MultipartUploadCryptoContext getContext() {
              return context;
          }
  
          public void setContext(MultipartUploadCryptoContext context) {
              this.context = context;
          }
  
          @Override
          public int hashCode() {
              int result = super.hashCode();
              final int prime = 31;
              result = prime * result + ((context == null) ? 0 : context.hashCode());
              return result;
          }
  
         @Override
          public void assign(UploadCheckPoint ucp) {
              assertUploadCheckPointIsLegal(ucp);
              super.assign(ucp);
              this.context = ((UploadCheckPointEncryption) ucp).context;
          }
      }
  
      @Override
      public UploadCheckPoint createUploadCheckPointWrap() {
          return new UploadCheckPointEncryption();
      }
  
      @Override
      public void loadUploadCheckPointWrap(UploadCheckPoint uploadCheckPoint, String checkpointFile) throws Throwable {
          assertUploadCheckPointIsLegal(uploadCheckPoint);
          uploadCheckPoint.load(checkpointFile);
          ContentCryptoMaterial cryptoMaterial = ((UploadCheckPointEncryption)uploadCheckPoint).getContext().getContentCryptoMaterial();
  
          if (cryptoMaterial instanceof ContentCryptoMaterialRW) {
              encryptionMaterials.decryptCEK(((ContentCryptoMaterialRW)cryptoMaterial));
          }
      }
  
      @Override
      public InitiateMultipartUploadResult initiateMultipartUploadWrap(
              UploadCheckPoint uploadCheckPoint, InitiateMultipartUploadRequest initiateMultipartUploadRequest)
              throws OSSException, ClientException {
          assertUploadCheckPointIsLegal(uploadCheckPoint);
  
          MultipartUploadCryptoContext context = new MultipartUploadCryptoContext();
          context.setPartSize(uploadCheckPoint.originPartSize);
          File file = new File(uploadCheckPoint.uploadFile);
          context.setDataSize(file.length());
  
          InitiateMultipartUploadResult result = ossEncryptionClient.initiateMultipartUpload(initiateMultipartUploadRequest, context);
          ((UploadCheckPointEncryption) uploadCheckPoint).setContext(context);
  
          return result;
      }
  
      @Override
      public UploadPartResult uploadPartWrap(UploadCheckPoint uploadCheckPoint, UploadPartRequest uploadPartRequest)
              throws OSSException, ClientException {
          assertUploadCheckPointIsLegal(uploadCheckPoint);
          return ossEncryptionClient.uploadPart(uploadPartRequest, ((UploadCheckPointEncryption) uploadCheckPoint).getContext());
      }
  
      @Override
      public CompleteMultipartUploadResult completeMultipartUploadWrap(
              UploadCheckPoint uploadCheckPoint, CompleteMultipartUploadRequest request)
              throws OSSException, ClientException {
          assertUploadCheckPointIsLegal(uploadCheckPoint);
          return ossEncryptionClient.completeMultipartUpload(request, ((UploadCheckPointEncryption) uploadCheckPoint).getContext());
      }
  
      private static void assertUploadCheckPointIsLegal(UploadCheckPoint uploadCheckPoint) {
          if (!(uploadCheckPoint instanceof UploadCheckPointEncryption)) {
              throw new ClientException("the uploadCheckPoint of encryption client operation should instance of UploadCheckPointEncryption.");
          }
      }
  }
  