public void Test_Decrypt_VerifyEndOfMessage_FalseWhenPartiallyDecrypted() { using (var ciphertextStream = new MemoryStream()) using (var key = XChaChaKey.Generate()) { var plaintext1 = RandomBytesGenerator.NextBytes(1024); var plaintext2 = RandomBytesGenerator.NextBytes(1024); using (var encryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Encrypt, leaveOpen: true)) { encryptionStream.Write(plaintext1); encryptionStream.WriteFinal(plaintext2); } ciphertextStream.Position = 0; using (var decryptionStream = new XChaChaStream(ciphertextStream, key, EncryptionMode.Decrypt)) { var decryptedPlainText = new byte[plaintext1.Length]; decryptionStream.Read(decryptedPlainText); Assert.False(decryptionStream.VerifyEndOfMessage()); } } }