MD5 hashing: Encodes a string
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* This file creation date: Mar 29, 2003 / 1:15:50 AM
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*/
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* Encodes a string using MD5 hashing
*
* @author Rafael Steil
* @version $Id: MD5.java,v 1.7 2006/08/23 02:13:44 rafaelsteil Exp $
*/
public class MD5
{
/**
* Encodes a string
*
* @param str String to encode
* @return Encoded String
* @throws NoSuchAlgorithmException
*/
public static String crypt(String str)
{
if (str == null || str.length() == 0) {
throw new IllegalArgumentException("String to encript cannot be null or zero length");
}
StringBuffer hexString = new StringBuffer();
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(str.getBytes());
byte[] hash = md.digest();
for (int i = 0; i < hash.length; i++) {
if ((0xff & hash[i]) < 0x10) {
hexString.append("0" + Integer.toHexString((0xFF & hash[i])));
}
else {
hexString.append(Integer.toHexString(0xFF & hash[i]));
}
}
}
catch (NoSuchAlgorithmException e) {
throw new RuntimeException("" + e);
}
return hexString.toString();
}
}
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