Java Encryption Algorithm-MD5

import java.security.MessageDigest; Public classMd5util {/** * MD5 encryption generates 32-bit MD5 code * @param string to be encrypted * @return return 32-bit MD5 code*/     Public Staticstring MD5 (String inStr) throws Exception {messagedigest MD5=NULL; Try{MD5= Messagedigest.getinstance ("MD5"); } Catch(Exception e) {System. out. println (E.tostring ());            E.printstacktrace (); return ""; }        byte[] ByteArray = Instr.getbytes ("UTF-8"); byte[] Md5bytes =md5.digest (ByteArray); StringBuffer Hexvalue=NewStringBuffer ();  for(inti =0; i < md5bytes.length; i++) {            intval = ((int) Md5bytes[i]) &0xFF; if(Val < -) {hexvalue.append ("0");        } hexvalue.append (Integer.tohexstring (Val)); }        returnhexvalue.tostring (); }    //encrypt two times at a time to decrypt     Public Staticstring convertMD5 (String inStr) {Char[] A =Instr.tochararray ();  for(inti =0; i < a.length; i++) {A[i]= (Char) (A[i] ^'T'); } String S=NewString (a); returns; }    //Reversible encryption Algorithm         Public Staticstring KL (String inStr) {//string s = new string (INSTR);            Char[] A =Instr.tochararray ();  for(inti =0; i < a.length; i++) {A[i]= (Char) (A[i] ^'T'); } String S=NewString (a); returns; }        //decryption after encryption         Public Staticstring JM (String inStr) {Char[] A =Instr.tochararray ();  for(inti =0; i < a.length; i++) {A[i]= (Char) (A[i] ^'T'); } String k=NewString (a); returnK; }    /** * Test main function * * @param args * @throws Exception*/    //passwords are encrypted first and then compared for equality     Public Static voidMain (String args[]) throws Exception {string str=NewString ("ABC"); System. out. println ("Original:"+str); System. out. println ("after MD5:"+MD5 (str)); System. out. println (convertMD5 (str)); System. out. println (convertMD5 (convertMD5 (str))); String s=NewString ("123123");//4297f44b13955235245b2497399d7a93System. out. println ("Original:"+str); System. out. println ("after MD5:"+MD5 (str)); System. out. println ("MD5 after re-encryption:"+KL (MD5 (str))); System. out. println ("after decrypting for MD5:"+JM (KL (MD5 (str))); }}

Java Encryption Algorithm-MD5