/*
* Copyright (C) 2010-2101 Alibaba Group Holding Limited.
*
* Licensed 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.alibaba.otter.node.etl.common.io;
import org.apache.commons.lang.StringUtils;
import com.alibaba.otter.node.etl.common.io.compress.Compressor;
import com.alibaba.otter.node.etl.common.io.compress.impl.gzip.GzipCompressor;
import com.alibaba.otter.node.etl.common.io.crypto.AESUtils;
import com.alibaba.otter.node.etl.common.io.signature.ChecksumException;
import com.alibaba.otter.node.etl.common.io.signature.ChecksumUtils;
/**
* 数据对象间转换的工具类
*
* @author jianghang 2011-10-13 下午07:37:46
* @version 4.0.0
*/
public class EncryptUtils {
private static final Compressor COMPRESSOR = new GzipCompressor();
public static EncryptedData encrypt(byte[] input) {
// 压缩数据
byte[] compData = COMPRESSOR.compress(input);
// 调用加密工具类
AESUtils aes = new AESUtils();
aes.generateSecretKey();
// 加密数据
byte[] encryptData = aes.encrypt(compData);
return new EncryptedData(encryptData, aes.getSecretyKeyString(), ChecksumUtils.checksum(encryptData));
}
public static byte[] decrypt(EncryptedData encode) {
String destCrc = ChecksumUtils.checksum(encode.getData());
//验证sign
if (false == StringUtils.equals(encode.getCrc(), destCrc)) {
throw new ChecksumException(String.format("orig: %s, parsed: %s not match", encode.getCrc(), destCrc));
}
// 调用加密工具类
AESUtils aes = new AESUtils();
aes.setSecretKeyString(encode.getKey());
// 解密并解压数据
return COMPRESSOR.decompress(aes.decrypt(encode.getData()));
}
}