Enkripsi Di Java

setelah kemarin saya post tentang kriptografi saya akan share tetnta contohnya yaitu enkripsi md5 di java ok ok ok :D

Dengan mencari lewat google, akhirnya tinggal memakai yang sudah jadi, lengkap dengan konversi hexa, dari www.anyexample.com, dengan sedikit modifikasi :

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.security.NoSuchAlgorithmException;

public class AeSimpleMD5 {

private static String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9))
buf.append((char) ('0' + halfbyte));
else
buf.append((char) ('a' + (halfbyte - 10)));
halfbyte = data[i] & 0x0F;
} while(two_halfs++ < 1);
}
return buf.toString();
}

public static String MD5(String text) 
throws NoSuchAlgorithmException, UnsupportedEncodingException {
MessageDigest md;
md = MessageDigest.getInstance("MD5");
byte[] md5hash = new byte[32];
md.update(text.getBytes("iso-8859-1"), 0, text.length());
md5hash = md.digest();
return convertToHex(md5hash);
}

public static void main(String[] args) throws IOException {
BufferedReader userInput = new BufferedReader (new InputStreamReader(System.in));

System.out.print("Enter string:");
String rawString = userInput.readLine();

try {
System.out.println("MD5 hash of string: " + AeSimpleMD5.MD5(rawString));
} catch (NoSuchAlgorithmException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

Hasilnya:
===============================================================

Enter string:dian suryo aji

Hasil :3adda5bbdb947d7ed007a2b463afa672

===============================================================

Posted in: Java Moklet,Keamanan