“坏数据” CryptographicException [英] "Bad Data" CryptographicException

问题描述

首先，我只是为了学术目的而写下面的代码。我说这是因为我不把这个放在生产环境，因此绕过我需要做的一些开销，如果我是，我只需要能够加密/解密一个字符串使用下面的代码。我能够做到这一点，但由于某种原因，我开始收到CryptographicException坏数据，不知道是什么可能导致的问题。

First, I have only written the code below for academic purposes. The reason I say this is because I am not putting this in a production environment, and therefor am "bypassing" some of the overhead that I would need to do if I was, I simply need to be able to encrypt/decrypt a string using the code below. I was able to do it a few time, but for some reason, I started receiving "CryptographicException Bad Data" and am not sure what might be causing the problem.

   private string RSAEncrypt(string value)
    {
        byte[] encryptedData = Encoding.Unicode.GetBytes(value);

        CspParameters cspParams = new CspParameters();
        cspParams.KeyContainerName = _rsaContainerName;
        using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams))
        {
            encryptedData = RSA.Encrypt(encryptedData, false);
            return Convert.ToBase64String(encryptedData);

        }

    }



    private string RSADecrypt(string value)
    {

        byte[] encryptedData = Encoding.Unicode.GetBytes(value);

        CspParameters cspParams = new CspParameters();
        cspParams.KeyContainerName = _rsaContainerName;
        using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams))
        { 
            encryptedData = RSA.Decrypt(encryptedData,false);
            return Convert.ToBase64String(encryptedData);

        }
    }

RSADecrypt调用。

It is only throwing this exception on the RSADecrypt call.

有什么想法吗？我读的地方可能与传递到RSA.Decrypt的加密数据的预期大小有关。

Any ideas? I read somewhere it might have to do with the expected size of encryptedData that is passed into RSA.Decrypt.

感谢
}

推荐答案

• 使用字符串编码来转换明文，即 Encoding.Unicode

  使用Base-64来回转换加密的数据（即 / From] Base64String ）;

  Convert the encrypted data back and forth using Base-64 (i.e. Convert.[To/From]Base64String);

  b
  

  private string RSAEncrypt(string value)
  {
      byte[] plaintext = Encoding.Unicode.GetBytes(value);
  
      CspParameters cspParams = new CspParameters();
      cspParams.KeyContainerName = _rsaContainerName;
      using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams))
      {
          byte[] encryptedData = RSA.Encrypt(plaintext, false);
          return Convert.ToBase64String(encryptedData);
      }
  }
  
  private string RSADecrypt(string value)
  {
      byte[] encryptedData = Convert.FromBase64String(value);
  
      CspParameters cspParams = new CspParameters();
      cspParams.KeyContainerName = _rsaContainerName;
      using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(2048,cspParams))
      { 
          byte[] decryptedData = RSA.Decrypt(encryptedData,false);
          return Encoding.Unicode.GetString(decryptedData);
      }
  }
  

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