Security.Cryptography.Debug没有抛出正确的异常

Question

我正在尝试使用microsoft Security.Cryptography.Debug.dll

调试加密函数

我在项目的下载中引用了3个Dll。我的加密函数按预期填充SymmetricEncryptionState对象，但我的解密函数抛出CryptographicException而不是我期待的CryptographicDiagnosticException。

SymmetricEncryptionState encryptionState = null; //set by encrypt function

public MemoryStream DecryptFileStream(byte[] cypherStream, string password, string salt)
{
    var output = new MemoryStream();

    using (SymmetricAlgorithm AESProvider = new AesManaged().EnableDecryptionVerification(encryptionState))
    {
        var key = new Rfc2898DeriveBytes(password, Encoding.ASCII.GetBytes(salt));

        AESProvider.KeySize = 256;
        AESProvider.BlockSize = 128;
        AESProvider.Key = key.GetBytes(AESProvider.KeySize / 8);
        AESProvider.IV = key.GetBytes(AESProvider.BlockSize / 8);

        try
        {
        CryptoStream plainTextStream = new CryptoStream(output, AESProvider.CreateDecryptor(), CryptoStreamMode.Write);
        byte[] buffer = new byte[cypherStream.Length];

        plainTextStream.Write(buffer, 0, buffer.Length);

        plainTextStream.FlushFinalBlock(); // this line throws the wrong exception type
        }

        catch (CryptographicDiagnosticException ex)
        {
            throw new Exception(ex.Message);
        }
    }


    return output;
}

我收到'填充无效且无法删除。' FlushFinalBlock()来电时出错。

如果有帮助，我的项目目标是.net 4.5

有没有人对此有任何想法？