// Constructors
//...........................................................................

    public MD4 () {
        super("MD4");
        engineReset();
    }

    /**
     *    This constructor is here to implement cloneability of this class.
     */
    private MD4 (MD4 md) {
        this();
        context = (int[])md.context.clone();
        buffer = (byte[])md.buffer.clone();

type Hash uint

// HashFunc simply returns the value of h so that [Hash] implements [SignerOpts].
func (h Hash) HashFunc() Hash {
	return h
}

func (h Hash) String() string {
	switch h {
	case MD4:
		return "MD4"
	case MD5:
		return "MD5"
	case SHA1:
		return "SHA-1"
	case SHA224:
		return "SHA-224"
	case SHA256:
		return "SHA-256"
	case SHA384:
		return "SHA-384"
	case SHA512:
		return "SHA-512"

        if ( password == null ) {
            throw new NullPointerException("Password parameter is required");
        }
        MessageDigest md4 = Crypto.getMD4();
        md4.update(Strings.getUNIBytes(password));
        return md4.digest();
    }


    /**
     * 
     * @param password
     * @return the calculated hash
     */

    private static Provider provider = null;


    /**
     * 
     */
    private Crypto () {}


    /**
     * 
     * @return MD4 digest
     */
    public static MessageDigest getMD4 () {
        try {
            return MessageDigest.getInstance("MD4", getProvider());
        }
        catch ( NoSuchAlgorithmException e ) {
            throw new CIFSUnsupportedCryptoException(e);
        }
    }