問題描述

首先，我僅出于學術目的編寫以下代碼.我之所以這么說是因為我沒有把它放在生產環境中，因此我繞過"了一些我需要做的開銷，我只需要能夠使用加密/解密字符串下面的代碼.有幾次我能夠做到這一點，但由于某種原因，我開始收到CryptographicException Bad Data"并且不確定是什么導致了問題.

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);

        }
    }

它只是在 RSADecrypt 調用上拋出這個異常.

It is only throwing this exception on the RSADecrypt call.

有什么想法嗎?我在某處讀到它可能與傳遞給 RSA.Decrypt 的 encryptedData 的預期大小有關.

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

謝謝}

推薦答案

• 使用字符串編碼(即Encoding.Unicode)來回轉換明文.

  使用 Base-64 來回轉換加密數據(即 Convert.[To/From]Base64String)；

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

  像這樣:

  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);
      }
  }
  

  這篇關于“壞數據"加密異常的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！

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