AES 256使用Bouncycastle解冻IV和盐

Question

目前我正在开发一个项目，我们正在构建服务器端和客户端应用程序（移动设备，使用Xamarin）。我们正在加密和解密数据（使用AES ...），以及服务器端的以下实现： Encrypting & Decrypting a String in C#

不幸的是，我们无法在Xamarin项目中使用该实现。所以我们想用Bouncycastle来解密数据。我遇到了以下Bouncycastle的Java实现，并尝试对其进行修改以使其与.NET一起使用。 How to use Bouncy Castle lightweight API with AES and PBE

导致：

private byte[] decryptWithLWCrypto(string cipherText, String password, int iterationCount)
        {
            // Get the complete stream of bytes that represent:
            // [32 bytes of Salt] + [32 bytes of IV] + [n bytes of CipherText]
            var cipherTextBytesWithSaltAndIv = Convert.FromBase64String(cipherText);
            // Get the saltbytes by extracting the first 32 bytes from the supplied cipherText bytes.
            var salt = cipherTextBytesWithSaltAndIv.Take(Keysize / 8).ToArray();
            // Get the IV bytes by extracting the next 32 bytes from the supplied cipherText bytes.
            var ivStringBytes = cipherTextBytesWithSaltAndIv.Skip(Keysize / 8).Take(Keysize / 8).ToArray();
            // Get the actual cipher text bytes by removing the first 64 bytes from the cipherText string.
            var cipher = cipherTextBytesWithSaltAndIv.Skip((Keysize / 8) * 2).Take(cipherTextBytesWithSaltAndIv.Length - ((Keysize / 8) * 2)).ToArray();

            Pkcs12ParametersGenerator pGen = new Pkcs12ParametersGenerator(new Sha256Digest());
            byte[] pkcs12PasswordBytes = Convert.FromBase64String(password);//PbeParametersGenerator
            pGen.Init(pkcs12PasswordBytes, salt, iterationCount);
            CbcBlockCipher aesCBC = new CbcBlockCipher(new RijndaelEngine(256));//was AesEngine

            ParametersWithIV aesCBCParams = new ParametersWithIV(pGen.GenerateDerivedParameters(256, 128), ivStringBytes);
            aesCBC.Init(false, aesCBCParams);
            PaddedBufferedBlockCipher aesCipher = new PaddedBufferedBlockCipher(aesCBC,
                    new Pkcs7Padding());
            byte[] plainTemp = new byte[aesCipher.GetOutputSize(cipher.Length)];
            int offset = aesCipher.ProcessBytes(cipher, 0, cipher.Length, plainTemp, 0);
            int last = aesCipher.DoFinal(plainTemp, offset);
            byte[] plain = new byte[offset + last];
            System.Array.Copy(plainTemp, 0, plain, 0, plain.Length);

            return plain;
        }

现在我收到以下错误，因为我正在尝试将Java中的示例调整为AES256：

Additional information: invalid parameter passed to Rijndael init - Org.BouncyCastle.Crypto.Parameters.ParametersWithIV

此时我尝试了很多，错误本身解释了发生了什么。但是我缺乏使用AES256，IV和盐来使用Bouncycastle的经验。我读到您无法使用AesEngine，因此您必须切换到RijndaelEngine以获取AES256。

有没有人使用此设置进行实际工作？在Xamarin应用程序中System.Security.Cryptography无法使用。