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 java.nio.charset.StandardCharsets;
  
  import org.apache.commons.codec.binary.Base64;
  
  import com.aliyun.odps.commons.transport.Headers;
  import com.aliyun.odps.commons.transport.Request;
  import com.aliyun.odps.utils.StringUtils;
  
  public class AppStsRequestSigner implements RequestSigner {
  
    private Account account;
    private String stsToken;
  
    public AppStsRequestSigner(Account account, String stsToken) {
  
      if (account == null) {
        throw new IllegalArgumentException("Account cannot be null");
      }
  
      if (StringUtils.isNullOrEmpty(stsToken)) {
        throw new IllegalArgumentException("STS token should not be empty.");
      }
  
      this.account = account;
      this.stsToken = stsToken;
    }
  
    @Override
    public void sign(String resource, Request req) {
      Account.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.STS_AUTHENTICATION, signature);
          break;
        default:
          throw new IllegalArgumentException(
              "Unsupported account provider for application account.");
      }
  
      req.getHeaders().put(Headers.STS_TOKEN, stsToken);
    }
  
    public String getAliyunSignature(Request request) {
      String strToSign = request.getHeaders().get(Headers.AUTHORIZATION);
      return getEncodedAliyunSignature(strToSign);
    }
  
    public String getEncodedAliyunSignature(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();
    }
  }
  