public async Task SymmetricEncryptionEqualsTest() { string message = "aw3lrifos83fusoi3fjsofisjfo"; byte[] messageBytes = Encoding.UTF8.GetBytes(message); var asymmetricEncryption = new AsymmetricEncryption(_publicKey, _privateKey); string path = Path.GetTempFileName(); MemoryStream encryptedStream = new MemoryStream(); await asymmetricEncryption.EnvelopeAsync(messageBytes, 256, 128, encryptedStream, CancellationToken.None); byte[] encryptedBytes = encryptedStream.ToArray(); int keyLen = BitConverter.ToInt32(encryptedBytes.Take(4).ToArray(), 0); byte[] key = encryptedBytes.Skip(4).Take(keyLen).ToArray(); int ivLen = BitConverter.ToInt32(encryptedBytes.Skip(4 + key.Length).Take(4).ToArray(), 0); byte[] iv = encryptedBytes.Skip(4 + key.Length + 4).Take(ivLen).ToArray(); key = asymmetricEncryption.DecryptToBytes(key); iv = asymmetricEncryption.DecryptToBytes(iv); byte[] encryptedMessageBytes = encryptedBytes.Skip(4 + keyLen + 4 + ivLen).ToArray(); SymmetricEncryption symmetricEncryption = new SymmetricEncryption(key, iv); string decryptedMessage = symmetricEncryption.DecryptToString(encryptedMessageBytes, Encoding.UTF8); Assert.Equal(message, decryptedMessage); }