Microsoft.SqlServer.TDS.TDSUtilities.ReadPasswordString C# (CSharp) Method

        internal static string ReadPasswordString(Stream source, ushort length)
        {
            // Allocate buffer
            byte[] byteString = new byte[length];

            // Read into a byte buffer
            source.Read(byteString, 0, byteString.Length);

            // Perform password decryption
            for (int i = 0; i < byteString.Length; i++)
            {
                // XOR first
                byteString[i] ^= 0xA5;

                // Swap 4 high bits with 4 low bits
                byteString[i] = (byte)(((byteString[i] & 0xf0) >> 4) | ((byteString[i] & 0xf) << 4));
            }

            // Convert
            return Encoding.Unicode.GetString(byteString, 0, byteString.Length);
        }