java各种加密
2017-11-02 本文已影响0人
jasonlu1208
importorg.apache.commons.codec.binary.Base64;
importjavax.crypto.KeyGenerator;
importjavax.crypto.Mac;
importjavax.crypto.SecretKey;
importjavax.crypto.spec.SecretKeySpec;
importjava.math.BigInteger;
importjava.security.InvalidKeyException;
importjava.security.MessageDigest;
importjava.security.NoSuchAlgorithmException;
/**
*@authorjasonLu
*@date2017/11/2 12:44
*@Description:
*/
public classMyEncrypt{
public static finalStringKEY_SHA="SHA";
public static finalStringKEY_MD5="MD5";
public static finalStringKEY_MAC="HmacMD5";
// sun不推荐使用它们自己的base64,用apache的挺好
/**
* BASE64解密
*/
public static byte[]decryptBASE64(byte[]dest) {
if(dest==null) {
return null;
}
returnBase64.decodeBase64(dest);
}
/**
* BASE64加密
*/
public static byte[]encryptBASE64(byte[]origin) {
if(origin==null) {
return null;
}
returnBase64.encodeBase64(origin);
}
/**
* MD5加密
*
*@throwsNoSuchAlgorithmException
*/
public static byte[]encryptMD5(byte[]data)
throwsNoSuchAlgorithmException{
if(data==null) {
return null;
}
MessageDigestmd5=MessageDigest.getInstance(KEY_MD5);
md5.update(data);
returnmd5.digest();
}
/**
* SHA加密
*
*@throwsNoSuchAlgorithmException
*/
public static byte[]encryptSHA(byte[]data)
throwsNoSuchAlgorithmException{
if(data==null) {
return null;
}
MessageDigestsha=MessageDigest.getInstance(KEY_SHA);
sha.update(data);
returnsha.digest();
}
/**
*初始化HMAC密钥
*
*@throwsNoSuchAlgorithmException
*/
public staticStringinitMacKey()throwsNoSuchAlgorithmException{
KeyGeneratorkeyGenerator=KeyGenerator.getInstance(KEY_MAC);
SecretKeysecretKey=keyGenerator.generateKey();
return newString(encryptBASE64(secretKey.getEncoded()));
}
/**
* HMAC加密
*
*@throwsNoSuchAlgorithmException
*@throwsInvalidKeyException
*/
public static byte[]encryptHMAC(byte[]data,Stringkey)
throwsNoSuchAlgorithmException,InvalidKeyException{
SecretKeysecretKey=newSecretKeySpec(decryptBASE64(key.getBytes()),
KEY_MAC);
Macmac=Mac.getInstance(secretKey.getAlgorithm());
mac.init(secretKey);
returnmac.doFinal(data);
}
public static voidmain(String[]args)throwsException{
Stringdata="test123456";
System.out.println(newBigInteger(encryptBASE64(data.getBytes())).toString(16));
System.out.println(newBigInteger(encryptBASE64(data.getBytes())).toString(32));
System.out.println(newString(decryptBASE64(encryptBASE64(data.getBytes()))));
System.out.println(newBigInteger(encryptMD5(data.getBytes())).toString());
System.out.println(newBigInteger(encryptSHA(data.getBytes())).toString());
System.out.println(newBigInteger(encryptHMAC(data.getBytes(),initMacKey())).toString());
}
}
