Koodit: Java: Yksinkertainen hash luokka

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

import sun.misc.BASE64Encoder;

/**
 * @author focus
 */
public final class Crypt {
	/**
	 * Static method to create 160 bit sha encoded string
	 * @param passwd string to be encoded
	 * @return base64 encoded string or null
	 */
	public static String cryptSha_160(String passwd) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("SHA-1");
			md.update(passwd.getBytes("UTF-8"));
		} catch (NoSuchAlgorithmException e) {
			System.out.println("Unsupported algorithm");
			return null;
		} catch (UnsupportedEncodingException e) {
			System.out.println("Unsupported Encoding");
			return null;
		}
		byte byteArray[] = md.digest();
		String hash = (new BASE64Encoder()).encode(byteArray);

		return hash;
	}

	/**
	 * Static method to create 256 bit sha encoded string
	 * @param passwd string to be encoded
	 * @return base64 encoded string or null
	 */
	public static String cryptSha_256(String passwd) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("SHA-256");
			md.update(passwd.getBytes("UTF-8"));
		} catch (NoSuchAlgorithmException e) {
			System.out.println("Unsupported algorithm");
			return null;
		} catch (UnsupportedEncodingException e) {
			System.out.println("Unsupported Encoding");
			return null;
		}
		byte byteArray[] = md.digest();
		String hash = (new BASE64Encoder()).encode(byteArray);

		return hash;
	}

	/**
	 * Static method to create 512 bit sha encoded string
	 * @param passwd string to be encoded
	 * @return base64 encoded string or null
	 */
	public static String cryptSha_512(String passwd) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("SHA-512");
			md.update(passwd.getBytes("UTF-8"));
		} catch (NoSuchAlgorithmException e) {
			System.out.println("Unsupported algorithm");
			return null;
		} catch (UnsupportedEncodingException e) {
			System.out.println("Unsupported Encoding");
			return null;
		}
		byte byteArray[] = md.digest();
		String hash = (new BASE64Encoder()).encode(byteArray);

		return hash;
	}
	/**
	 * Static method to create 128 bit md5 encoded string
	 * @param passwd string to be encoded
	 * @return base64 encoded string or null
	 */
	public static String cryptMd5(String passwd) {
		MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("MD5");
			md.update(passwd.getBytes("UTF-8"));
		} catch (NoSuchAlgorithmException e) {
			System.out.println("Unsupported algorithm");
			return null;
		} catch (UnsupportedEncodingException e) {
			System.out.println("Unsupported Encoding");
			return null;
		}
		byte byteArray[] = md.digest();
		String hash = (new BASE64Encoder()).encode(byteArray);

		return hash;
	}
}