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package com.test.util.encrypt;
import org.apache.commons.lang3.StringUtils;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.SecureRandom;
/** * 一些简单的编码测试
* Created by miaorf on 2016/4/24.
*/
public class AESEncrypt {
public static void main(String[] args) throws Exception {
String content = "我爱你" ;
System.out.println( "加密前:" + content);
String key = "123456" ;
System.out.println( "加密密钥和解密密钥:" + key);
String encrypt = aesEncrypt(content, key);
System.out.println( "加密后:" + encrypt);
String decrypt = aesDecrypt(encrypt, key);
System.out.println( "解密后:" + decrypt);
}
/**
* base 64 encode
*
* @param bytes 待编码的byte[]
* @return 编码后的base 64 code
*/
public static String base64Encode( byte [] bytes) {
return new BASE64Encoder().encode(bytes);
}
/**
* base 64 decode
*
* @param base64Code 待解码的base 64 code
* @return 解码后的byte[]
* @throws Exception
*/
public static byte [] base64Decode(String base64Code) throws Exception {
return StringUtils.isEmpty(base64Code) ? null : new BASE64Decoder().decodeBuffer(base64Code);
}
/**
* AES加密
*
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的byte[]
* @throws Exception
*/
public static byte [] aesEncryptToBytes(String content, String encryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
kgen.init( 128 , new SecureRandom(encryptKey.getBytes()));
Cipher cipher = Cipher.getInstance( "AES" );
cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES" ));
return cipher.doFinal(content.getBytes( "utf-8" ));
}
/**
* AES加密为base 64 code
*
* @param content 待加密的内容
* @param encryptKey 加密密钥
* @return 加密后的base 64 code
* @throws Exception
*/
public static String aesEncrypt(String content, String encryptKey) throws Exception {
return base64Encode(aesEncryptToBytes(content, encryptKey));
}
/**
* AES解密
*
* @param encryptBytes 待解密的byte[]
* @param decryptKey 解密密钥
* @return 解密后的String
* @throws Exception
*/
public static String aesDecryptByBytes( byte [] encryptBytes, String decryptKey) throws Exception {
KeyGenerator kgen = KeyGenerator.getInstance( "AES" );
kgen.init( 128 , new SecureRandom(decryptKey.getBytes()));
Cipher cipher = Cipher.getInstance( "AES" );
cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(kgen.generateKey().getEncoded(), "AES" ));
byte [] decryptBytes = cipher.doFinal(encryptBytes);
return new String(decryptBytes);
}
/**
* 将base 64 code AES解密
*
* @param encryptStr 待解密的base 64 code
* @param decryptKey 解密密钥
* @return 解密后的string
* @throws Exception
*/
public static String aesDecrypt(String encryptStr, String decryptKey) throws Exception {
return StringUtils.isEmpty(encryptStr) ? null : aesDecryptByBytes(base64Decode(encryptStr), decryptKey);
}
} |
本文转自Ryan.Miao博客园博客,原文链接:http://www.cnblogs.com/woshimrf/p/5436770.html,如需转载请自行联系原作者