ImgCrypto.java

package carpool.encryption;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class ImgCrypto {
	
    private static String convertedToHex(byte[] data){ 	
        StringBuffer buf = new StringBuffer();
        
        for (int i = 0; i < data.length; i++) { 
            int halfOfByte = (data[i] >>> 4) & 0x0F;
            int twoHalfBytes = 0;
            
            do { 
                if ((0 <= halfOfByte) && (halfOfByte <= 9)) {
                    buf.append( (char) ('0' + halfOfByte) );
                }
                
                else {
                    buf.append( (char) ('a' + (halfOfByte - 10)) );
                }

                halfOfByte = data[i] & 0x0F;

            } while(twoHalfBytes++ < 1);
        } 
        return buf.toString();
    } 

    public static String encrypt(String text) throws NoSuchAlgorithmException, UnsupportedEncodingException{ 
        MessageDigest md = MessageDigest.getInstance("MD5");
        byte[] md5 = new byte[64];
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        md5 = md.digest();
        return convertedToHex(md5);
    } 
	
	
}