Java encryption algorithm-MD5 encryption and Hash hash encryption algorithm source code, encryption algorithm-md5

Java encryption algorithm-MD5 encryption and Hash hash encryption algorithm source code, encryption algorithm-md5

Package com. ompa. common. utils;

Import java. security. MessageDigest;
Import java. security. NoSuchAlgorithmException;

Import javax. crypto. Mac;
Import javax. crypto. SecretKey;
Import javax. crypto. spec. SecretKeySpec;

/**
* MD5 Encryption
*
* @ Author zhangcd
* @ Date 2016-4-29
*/
Public class EncryptUtil {

Private static final String MAC_NAME = "HmacSHA1 ";
Private static final String ENCODING = "UTF-8 ";
Private static final String key = "iloveyou ";

/***
* Use MD5 to generate a 32-bit md5 code
*/
Public static String string2MD5 (String inStr ){
MessageDigest md5 = null;
Try {
Md5 = MessageDigest. getInstance ("MD5 ");
} Catch (Exception e ){
System. out. println (e. toString ());
E. printStackTrace ();
Return "";
}
Char [] charArray = inStr. toCharArray ();
Byte [] byteArray = new byte [charArray. length];

For (int I = 0; I <charArray. length; I ++)
ByteArray [I] = (byte) charArray [I];
Byte [] md5Bytes = md5.digest (byteArray );
StringBuffer hexValue = new StringBuffer ();
For (int I = 0; I <md5Bytes. length; I ++ ){
Int val = (int) md5Bytes [I]) & 0xff;
If (val <16)
HexValue. append ("0 ");
HexValue. append (Integer. toHexString (val ));
}
Return hexValue. toString ();

}

/***
* MD5 encryption generates 32-bit md5 code
*/
Public static String stringMD5 (String inStr ){
Return string2MD5 (string2MD5 (inStr ));

}

/**
* Encryption and decryption algorithms
*/
Public static String convertMD5 (String inStr ){

Char [] a = inStr. toCharArray ();
For (int I = 0; I <a. length; I ++ ){
A [I] = (char) (a [I] ^ 'T ');
}
String s = new String ();
Return s;

}

/**
* HMAC-SHA1
* @ Param encryptText
* @ Param encryptKey
* @ Return
* @ Throws Exception
*/
Public static String HmacSHA1Encrypt (String encryptText, String encryptKey) throws Exception
{
Byte [] data = encryptKey. getBytes (ENCODING );
SecretKey secretKey = new SecretKeySpec (data, MAC_NAME );
Mac mac = Mac. getInstance (MAC_NAME );
Mac. init (secretKey );

Byte [] text = encryptText. getBytes (ENCODING );
Byte [] str = mac. doFinal (text );
// Create Hex String
StringBuffer hexString = new StringBuffer ();
// Convert byte array to hexadecimal number
For (int I = 0; I <str. length; I ++ ){
String shaHex = Integer. toHexString (str [I] & 0xFF );
If (shaHex. length () <2 ){
HexString. append (0 );
}
HexString. append (shaHex );
}
Return hexString. toString ();
}

Public static String convertSHA1 (String instr ){
Try {
Return HmacSHA1Encrypt (instr, key );
} Catch (Exception e ){
// TODO Auto-generated catch block
E. printStackTrace ();
Return "";
}
}

// Test the main function
Public static void main (String args []) throws Exception {
// Hash hash encryption with a key
String tt = convertSHA1 ("123456 ");
System. out. println (tt );

// MD5 Encryption
String s = new String ("123456 ");
System. out. println ("Original:" + s );
System. out. println ("after MD5:" + string2MD5 (s ));
System. out. println ("after MD5 encryption:" + stringMD5 (s ));
}
}