Java implementation Base64, MD5, MAC, HMAC encryption (RPM)

Beginning to those basic encryption is not very skilled, and then summed up some, wrote a test: Support Base64, MD5, MAC, HMAC encryption, long story short, we all prefer to understand, look at the code!

The format of the transmission UTF-8 ...

 Packagecodec;Importjava.security.MessageDigest;ImportJavax.crypto.KeyGenerator;ImportJavax.crypto.Mac;ImportJavax.crypto.SecretKey;ImportJavax.crypto.spec.SecretKeySpec;ImportSun.misc.BASE64Decoder;ImportSun.misc.BASE64Encoder;/*** Basic Cryptographic components * *@authorvisec Dana *@version1.0 *@since1.0*/ Public Abstract classCoder { Public Static FinalString Key_sha = "SHA";  Public Static FinalString key_md5 = "MD5"; /*** Mac algorithm can choose the following algorithms * * <pre> * HmacMD5 * HmacSHA1 * HmacSHA256 * HmacSHA384 * HmacSHA512 * </pre>*/     Public Static FinalString Key_mac = "HmacMD5"; /*** BASE64 Decryption * *@paramKey *@return     * @throwsException*/     Public Static byte[] decryptBASE64 (String key)throwsException {return(NewBase64decoder ()). Decodebuffer (key); }    /*** BASE64 Encryption * *@paramKey *@return     * @throwsException*/     Public StaticString encryptBASE64 (byte[] key)throwsException {return(NewBase64encoder ()). Encodebuffer (key); }    /*** MD5 Encryption * *@paramData *@return     * @throwsException*/     Public Static byte[] EncryptMD5 (byte[] data)throwsException {messagedigest MD5=messagedigest.getinstance (KEY_MD5);        Md5.update (data); returnmd5.digest (); }    /*** SHA Encryption * *@paramData *@return     * @throwsException*/     Public Static byte[] Encryptsha (byte[] data)throwsException {messagedigest sha=messagedigest.getinstance (Key_sha);        Sha.update (data); returnsha.digest (); }    /*** Initialize HMAC key * *@return     * @throwsException*/     Public StaticString Initmackey ()throwsException {keygenerator keygenerator=keygenerator.getinstance (KEY_MAC); Secretkey Secretkey=Keygenerator.generatekey (); returnencryptBASE64 (secretkey.getencoded ()); }    /*** Mac Encryption * *@paramData *@paramKey *@return     * @throwsException*/     Public Static byte[] Encrypthmac (byte[] data, String key)throwsException {secretkey Secretkey=NewSecretkeyspec (decryptBASE64 (key), KEY_MAC); Mac Mac=mac.getinstance (Secretkey.getalgorithm ());        Mac.init (Secretkey); returnmac.dofinal (data); }}

 Packagecodec;ImportJava.math.BigInteger; Public classCodertest { Public Static voidMain (string[] args)throwsException {codertest.test (); }     Public Static voidTest ()throwsException {String inputstr= "This is some simple cryptographic test"; System.err.println ("Original:" +inputstr); byte[] Inputdata =inputstr.getbytes (); String Code=coder.encryptbase64 (Inputdata); System.err.println ("BASE64 after encryption:" +code); byte[] Output =coder.decryptbase64 (code); String Outputstr=NewString (output); System.err.println ("BASE64 after decryption:" +outputstr); //Unit Test junit4[temporarily not ...]        /**//verify BASE64 encryption and decryption consistency assertequals (INPUTSTR, OUTPUTSTR);         * *//Verify that MD5 is consistent with the same content encryption Assertarrayequals (CODER.ENCRYPTMD5 (inputdata), * coder. ENCRYPTMD5 (Inputdata)); * *//Verify that SHA is consistent with the same content encryption Assertarrayequals (Coder.encryptsha (inputdata), * coder. Encryptsha (input         Data)); * * String key = Coder.initmackey ();         SYSTEM.ERR.PRINTLN ("Mac key:/n" + * key); * *//verify HMAC for the same content, the same key encryption is consistent * Assertarrayequals (Coder.encrypthmac (Inputdata, key), * Coder.enc         Rypthmac (Inputdata, key)); */BigInteger MD5=NewBigInteger (CODER.ENCRYPTMD5 (inputdata)); System.err.println ("MD5:" + md5.tostring (16)); BigInteger sha=NewBigInteger (Coder.encryptsha (inputdata)); System.err.println ("SHA:" + sha.tostring (32)); BigInteger mac=NewBigInteger (Coder.encrypthmac (Inputdata, inputstr)); System.err.println ("HMAC:" + mac.tostring (16)); }}

Output:

Original: This is some simple encryption test BASE64 after encryption:6l+z5piv5lia5lqb566a5y2v55qe5yqg5a+g5rwl6k+VBASE64 After decryption: This is some simple cryptographic test MD5 : 76757e30d128e82b14488b115794d959sha:6f7afslor1oev1k7k40um57cscuqkjtnhmac:782313e944a28a55fc20507e50a9d470 

Java implementation Base64, MD5, MAC, HMAC encryption (RPM)