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.odps.account;
  
  import com.aliyun.odps.account.Account.AccountProvider;
  import com.aliyun.odps.commons.transport.Headers;
  import com.aliyun.odps.commons.transport.Request;
  import com.aliyun.odps.utils.StringUtils;
  import java.nio.charset.StandardCharsets;
  
  import org.apache.commons.codec.binary.Base64;
  
  /**
   * @author Jon (wangzhong.zw@alibaba-inc.com)
   */
  public class AppRequestSigner implements RequestSigner {
      private Account account;
  
      public AppRequestSigner(Account account) {
          this.account = account;
      }
  
      @Override
      public void sign(String resource, Request req) {
          AccountProvider accountProvider = this.account.getType();
          switch(accountProvider) {
              case ALIYUN:
                  // TODO: Case sensitive
                  String providerStr = accountProvider.toString().toLowerCase();
                  String signature = SecurityUtils.getFormattedSignature(
                      providerStr,
                      ((AliyunAccount) account).getAccessId(),
                      getAliyunSignature(req));
                  req.getHeaders().put(Headers.APP_AUTHENTICATION, signature);
                  break;
              default:
                  throw new IllegalArgumentException(
                      "Unsupported account provider for application account.");
          }
      }
  
      public String getAliyunSignature(Request request) {
          String strToSign = request.getHeaders().get(Headers.AUTHORIZATION);
          return getAliyunSignature(strToSign);
      }
  
      public String getAliyunSignature(String strToSign) {
          if (StringUtils.isNullOrEmpty(strToSign)) {
              throw new RuntimeException("String to sign cannot be empty or null.");
          }
  
          byte[] crypto;
          crypto = SecurityUtils.hmacsha1Signature(
              strToSign.getBytes(StandardCharsets.UTF_8),
              ((AliyunAccount) account).getAccessKey().getBytes());
  
          return Base64.encodeBase64String(crypto).trim();
      }
  }
  