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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);
}
}
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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
