private static byte[] Encrypt(string password)
    {
	    var key = new byte[16];
        long one, two, three, four;
        var dst = new byte[16];
        var nBytes = password.Length;

        for (var i = 0; i < nBytes; i++ )
        {
            key[i] = Encoding.ASCII.GetBytes(password.Substring(i, 1))[0];
            dst[i] = key[i];
        }

	    long rslt  = @key[0] + @key[1]*256 + @key[2]*65536 + @key[3]*16777216;
	    one = rslt * 213119 + 2529077;
        one = one - ToInt32(one / 4294967296) * 4294967296;

	    rslt  = @key[4] + @key[5]*256 + @key[6]*65536 + @key[7]*16777216;
        two = rslt * 213247 + 2529089;
        two = two - ToInt32(two / 4294967296) * 4294967296;

	    rslt  = @key[8] + @key[9]*256 + @key[10]*65536 + @key[11]*16777216;
        three = rslt * 213203 + 2529589;
        three = three - ToInt32(three / 4294967296) * 4294967296;

	    rslt  = @key[12] + @key[13]*256 + @key[14]*65536 + @key[15]*16777216;
        four = rslt * 213821 + 2529997;
        four = four - ToInt32(four / 4294967296) * 4294967296;

        key[3] = ParseInt(one / 16777216);
        key[2] = ParseInt((((Int32)(one - @key[3] * 16777216)) / 65535));
        key[1] = ParseInt((one - @key[3] * 16777216 - @key[2] * 65536) / 256);
        key[0] = ParseInt((one - @key[3] * 16777216 - @key[2] * 65536 - @key[1] * 256));

        key[7] = ParseInt(two / 16777216);
        key[6] = ParseInt((two - @key[7] * 16777216) / 65535);
        key[5] = ParseInt((two - @key[7] * 16777216 - @key[6] * 65536) / 256);
        key[4] = ParseInt((two - @key[7] * 16777216 - @key[6] * 65536 - @key[5] * 256));

        key[11] = ParseInt(three / 16777216);
        key[10] = ParseInt((three - @key[11] * 16777216) / 65535);
        key[9] = ParseInt((three - @key[11] * 16777216 - @key[10] * 65536) / 256);
        key[8] = ParseInt((three - @key[11] * 16777216 - @key[10] * 65536 - @key[9] * 256));

        key[15] = ParseInt(four / 16777216);
        key[14] = ParseInt((four - @key[15] * 16777216) / 65535);
        key[13] = ParseInt((four - @key[15] * 16777216 - @key[14] * 65536) / 256);
        key[12] = ParseInt((four - @key[15] * 16777216 - @key[14] * 65536 - @key[13] * 256));

        dst[0] = ParseInt(dst[0] ^ @key[0]);

        for (var i = 1; i < dst.Length; i++)
            dst[i] = ParseInt(@dst[i] ^ @dst[i - 1] ^ @key[i]);

        for (var i = 0; i < dst.Length; i++)
            if (dst[i] == 0)
                dst[i] = 102;
                
	return dst;
    }

    private static int ToInt32(long val)
    {
        return Convert.ToInt32(val);
    }
    
    private static byte ParseInt(long val)
    {
        return BitConverter.GetBytes(val)[0];
    }

private const string MD5Password = "key";
        private static string hCrypt(string password)
        {
            var md5Password = MD5Password.ToCharArray();
            var s = (EncryptMD5(password) + EncryptMD5(MD5Password)).ToCharArray();
            int j = 0;
	        for (var i = 0; i < s.Length; i++)
	        {
                if (j >= MD5Password.Length) j = 0;

                var calcu = s[i] ^ md5Password[j];
	            s[i] = (char)calcu;
		        j++;
	        }
            return EncryptMD5(new string(s));
        }


        public static string EncryptMD5(string originalPassword)
        {
            return BitConverter.ToString(((new MD5CryptoServiceProvider()).ComputeHash(Encoding.UTF8.GetBytes(originalPassword)))).Replace("-", "").ToLower();
        }