Bouncy Castle在C#中不解密Java中的DoFinal

Question

我正在尝试解密使用Java中的Bouncy Castle库和C#加密的数据。用Java加密的数据（同样使用Bouncy Castle库）可以用Java解密。我正在使用相同的键和参数，但是当我到达DoFinal时，我得到错误“pad block corrupted”。

下面是Java：

KeyParameter keyParam = new KeyParameter(key);
CipherParameters param = new ParametersWithIV(keyParam, initVector);

BlockCipherPadding padding = new PKCS7Padding();
BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESEngine()), padding);
cipher.reset();
cipher.init(true, param);

byte[] fileBytes = Base64.decodeBase64(decryptedStringData);
byte[] encrypted = new byte[cipher.getOutputSize(fileBytes.length)];
int l = cipher.processBytes(fileBytes, 0, fileBytes.length, encrypted, 0);
l += cipher.doFinal(encrypted, l);

return (Base64.encodeBase64String(encrypted));

KeyParameter keyParam = new KeyParameter(key);
ICipherParameters param = new ParametersWithIV(keyParam, initVector);

IBlockCipherPadding padding = new Pkcs7Padding();
BufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CbcBlockCipher(new AesEngine()), padding);
cipher.Reset();
cipher.Init(false, param);

byte[] fileBytes = Convert.FromBase64String(encryptedDataString);
byte[] decrypted = new byte[cipher.GetOutputSize(fileBytes.Length)];
int l = cipher.ProcessBytes(fileBytes, 0, fileBytes.Length, decrypted, 0);
l += cipher.DoFinal(decrypted, l);

return(Convert.ToBase64String(decrypted));

Answer 1

原来，提供给加密和解密的数据是以不同的格式编码的。我正在引入UTF-8编码的字符串进行解密，首先需要将它们变成Base64字符串。谢谢你提供的所有帮助。