使用AES和base64_encode的问题结果

Question

我想加密一个字符串，然后将其转换成一个base64_encode字符串以传递给一个网站，以便它可以解密它。

我下面的函数似乎没有正常工作，它不会将base64_encode字符串解密回原始字符串。

任何人都看到问题了吗？

感谢

public static string EncryptToString(string data, string KeyString, string IVString) 
{ 
    ASCIIEncoding encoding = new ASCIIEncoding(); 
    byte[] Data = encoding.GetBytes(data); 
    byte[] Key = encoding.GetBytes(KeyString); 
    byte[] IV = encoding.GetBytes(IVString); 

    try 
    { 
     MemoryStream fStream = new MemoryStream(Data); 

     // Set Rijndael object mode. 

     Rijndael RijndaelAlg; 
     RijndaelAlg = Rijndael.Create(); 
     RijndaelAlg.Mode = CipherMode.CBC; 

     // Create a CryptoStream using the FileStream 
     // and the passed key and initialization vector (IV). 
     CryptoStream cStream = new CryptoStream(fStream, 
      RijndaelAlg.CreateEncryptor(Key, IV), 
      CryptoStreamMode.Read); 

     // Create a StreamReader using the CryptoStream. 
     StreamReader sReader = new StreamReader(cStream); 

     string encryptedString = null; 

     try 
     { 
      // Read the data from the stream 
      // to decrypt it. 
      encryptedString = sReader.ReadToEnd(); 

      // Convert result into a base64-encoded string. 
      byte[] bytes = encoding.GetBytes(encryptedString); 
      encryptedString = Convert.ToBase64String(bytes, 0, bytes.Length); 

     } 
     catch (Exception e) 
     { 
      Console.WriteLine("An error occurred: {0}", e.Message); 
     } 
     finally 
     { 
      // Close the streams and 
      // close the file. 
      sReader.Close(); 
      cStream.Close(); 
      fStream.Close(); 
      RijndaelAlg.Dispose(); 
     } 

     // Return the string. 
     return encryptedString; 
    } 
    catch (CryptographicException e) 
    { 
     Console.WriteLine("A Cryptographic error occurred: {0}", e.Message); 
     return null; 
    } 
    catch (UnauthorizedAccessException e) 
    { 
     Console.WriteLine("A file error occurred: {0}", e.Message); 
     return null; 
    } 
} 

public static string DecryptToString(string data, string KeyString, string IVString) 
{ 
    ASCIIEncoding encoding = new ASCIIEncoding(); 
    // Convert result from a base64-encoded to string. 
    byte[] Data = Convert.FromBase64String(data); 

    byte[] Key = encoding.GetBytes(KeyString); 
    byte[] IV = encoding.GetBytes(IVString); 

    try 
    { 
     MemoryStream fStream = new MemoryStream(Data); 

     // Set Rijndael object mode. 
     Rijndael RijndaelAlg; 
     RijndaelAlg = Rijndael.Create(); 
     RijndaelAlg.Mode = CipherMode.CBC; 

     // Create a CryptoStream using the FileStream 
     // and the passed key and initialization vector (IV). 
     CryptoStream cStream = new CryptoStream(fStream, 
      RijndaelAlg.CreateDecryptor(Key, IV), 
      CryptoStreamMode.Read); 

     // Create a StreamReader using the CryptoStream. 
     StreamReader sReader = new StreamReader(cStream); 

     string decryptedString = null; 

     try 
     { 
      // Read the data from the stream 
      // to decrypt it. 
      decryptedString = sReader.ReadToEnd(); 

     } 
     catch (Exception e) 
     { 
      Console.WriteLine("An error occurred: {0}", e.Message); 
     } 
     finally 
     { 
      // Close the streams and 
      // close the file. 
      sReader.Close(); 
      cStream.Close(); 
      fStream.Close(); 
      RijndaelAlg.Dispose(); 
     } 

     // Return the string. 
     return decryptedString; 
    } 
    catch (CryptographicException e) 
    { 
     Console.WriteLine("A Cryptographic error occurred: {0}", e.Message); 
     return null; 
    } 
    catch (UnauthorizedAccessException e) 
    { 
     Console.WriteLine("A file error occurred: {0}", e.Message); 
     return null; 
    } 
} 

Answer 1

我不知道它的确切位置是哪里错了，但我这样做时，我有一些奇怪的问题了。我将与您分享我写的代码以使其正常工作：

     static public String EncryptString(String message) 
     { 
      String sRet = ""; 
      RijndaelManaged rj = new RijndaelManaged(); 
      try 
      { 
       rj.Key = Key; 
       rj.IV = IV; 
       MemoryStream ms = new MemoryStream(); 

       using (CryptoStream cs = new CryptoStream(ms, rj.CreateEncryptor(Key, IV), CryptoStreamMode.Write)) 
       { 
        using (StreamWriter sw = new StreamWriter(cs)) 
        { 
         sw.Write(message); 
        } 
       } 
       byte[] encoded = ms.ToArray(); 
       sRet = Convert.ToBase64String(encoded); 

      } 
      finally 
      { 
       rj.Clear(); 
      } 

      return sRet; 

     } 

     static public String DecryptString(String cypher) 
     { 
      String sRet = ""; 
      RijndaelManaged rj = new RijndaelManaged(); 
      try 
      { 
       byte[] message = Convert.FromBase64String(cypher); 
       rj.Key = Key; 
       rj.IV = IV; 
       MemoryStream ms = new MemoryStream(message); 

       using (CryptoStream cs = new CryptoStream(ms, rj.CreateDecryptor(Key, IV), CryptoStreamMode.Read)) 
       { 
        using (StreamReader sr = new StreamReader(cs)) 
        { 
         sRet = sr.ReadToEnd(); 
        } 
       } 

      } 
      finally 
      { 
       rj.Clear(); 
      } 

      return sRet; 

     }

Key和IV是包含在类中的静态byte []。