Hmacsha and HMACMD5 encryption algorithm implementation

package com.asiainfo.encryption.s2;import java.security.invalidkeyexception;import  java.security.nosuchalgorithmexception;import java.security.signatureexception;import  java.util.formatter;import javax.crypto.keygenerator;import javax.crypto.mac;import  Javax.crypto.secretkey;import javax.crypto.spec.secretkeyspec;import sun.misc.base64encoder;public  class HmacSignature {private static final String HMAC_SHA1_ALGORITHM  =  "HMACSHA1";  //algorithm name  etc: hmacsha256, HMACSHA384, HMACSHA512, HMACMD5, (jdk  does not provide HMACSHA224 algorithm implementation)                                                                  Private static string tohexstring (byte[] bytes)  {formatter formatter =  new formatter ();for  (byte b : bytes)  {formatter.format ("%02x",  b);} String hexstring = formatter.tostring (); Formatter.close (); return hexstring;} Public static string calculaterfc2104hmac (String data, string key)  throws  SignatureException, NoSuchAlgorithmException, InvalidKeyException {SecretKeySpec  Signingkey = new secretkeyspec (Key.getbytes (),  hmac_sha1_algorithm); Mac mac = mac.getinstance (Hmac_sha1_algorithm); Mac.init (Signingkey); Return toHexString ( Mac.dofinal (Data.getbytes ()));} Public static string calculaterfc2104hmac (String data, byte[] key)  throws  SignatureException, NoSuchAlgorithmException, InvalidKeyException {SecretKeySpec  Signingkey = new secRetkeyspec (Key, hmac_sha1_algorithm); Mac mac = mac.getinstance (Hmac_sha1_algorithm); Mac.init (Signingkey); Return toHexString ( Mac.dofinal (Data.getbytes ()));} Public static void main (String[] args)  throws Exception {KeyGenerator  Generator = keygenerator.getinstance (Hmac_sha1_algorithm); Secretkey key = generator.generatekey (); byte[] digest = key.getencoded (); Base64encoder encoder = new base64encoder (); String encoderdigest = encoder.encodebuffer (Digest);encoderdigest =  Encoderdigest.replaceall ("[^ (a-za-z0-9)]",  "")  //if you want to see the generated key System.out.println ("BASE64 encoded key:"   + encoderdigest); string content =  "Generation Guru"; System.out.println ("PlainText: "  + content); String hmac = calculaterfc2104hmac (content, encoderdigest); System.out.println ("Ciphertext: "  + hmac);}} Final output:  BASE64 encoded key: LWFMHK3H0QMTOFLGJDZ5HWHHZ14ENEP7P7QXNCXVNXWQUWWJMCVA6CQWP3GUVKTE2ARSCZSF0LSARH9JXG plaintext:  Beautiful cipher:  719e053be349ca02a721a3d6b509e84e21f7a0c5

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Hmacsha and HMACMD5 encryption algorithm implementation