public static byte[] Decrypt(byte[] data1, byte[] key)
        {
            byte[] data = AlgoTea.Encrypt(data1, key);
            if (data.Length % 8 != 0)
            {
                throw new ArgumentException("Длина зашифрованных данных должна быть кратна 8 байтам");
            }
            uint[] key1   = AlgoTea.CreateKey(key);
            uint[] v      = new uint[2];
            byte[] buffer = new byte[data.Length];
            Array.Copy((Array)data, (Array)buffer, data.Length);
            using (MemoryStream memoryStream = new MemoryStream(buffer))
            {
                using (BinaryWriter binaryWriter = new BinaryWriter((Stream)memoryStream))
                {
                    for (int startIndex = 0; startIndex < buffer.Length; startIndex += 8)
                    {
                        v[0] = BitConverter.ToUInt32(buffer, startIndex);
                        v[1] = BitConverter.ToUInt32(buffer, startIndex + 4);
                        AlgoTea.BlockDecrypt(v, key1);
                        binaryWriter.Write(v[0]);
                        binaryWriter.Write(v[1]);
                    }
                }
            }
            uint uint32 = BitConverter.ToUInt32(buffer, 0);

            if ((long)uint32 > (long)(buffer.Length - 4))
            {
                throw new ArgumentException("Зашифрованные данные разрушены");
            }
            byte[] numArray = new byte[(int)uint32];
            Array.Copy((Array)buffer, 4L, (Array)numArray, 0L, (long)uint32);
            return(numArray);
        }
 private void btnEncode_Click(object sender, EventArgs e)
 {
     try
     {
         this.tbEncoded.Text = AlgoTea.Encrypt(this.tbSource.Text, this.tbPassword.Text);
     }
     catch (Exception ex)
     {
         int num = (int)MessageBox.Show((IWin32Window)this, ex.Message, "Кодирование", MessageBoxButtons.OK, MessageBoxIcon.Hand);
     }
 }
 public static string Encrypt(string data, string key) => Encoding.Default.GetString(AlgoTea.Encrypt(Encoding.Default.GetBytes(data), Encoding.Default.GetBytes(key)));