C＃加密的Rijndael 256

Question

我用这个例子，从计算器： C# Encryption to PHP Decryption

GENERATE FUNCTION：

public static void GenerateKeyIV(out string key, out string IV) 
    { 
     var rj = new RijndaelManaged() 
     { 
      Padding = PaddingMode.PKCS7, 
      Mode = CipherMode.CBC, 
      KeySize = 256, 
      BlockSize = 256, 
      //FeedbackSize = 256 
     }; 
     key = Convert.ToBase64String(rj.Key); 
     IV = Convert.ToBase64String(rj.IV); 
    } 

加密2 FUNCTION：

public static string Encrypt2(string prm_text_to_encrypt, string prm_key, string prm_iv) 
    { 
     var sToEncrypt = prm_text_to_encrypt; 

     var rj = new RijndaelManaged() 
     { 
      Padding = PaddingMode.PKCS7, 
      Mode = CipherMode.CBC, 
      KeySize = 256, 
      BlockSize = 256, 
      //FeedbackSize = 256 
     }; 

     var key = Encoding.ASCII.GetBytes(prm_key); 
     var IV = Encoding.ASCII.GetBytes(prm_iv); 
     //var key = Convert.FromBase64String(prm_key); 
     //var IV = Convert.FromBase64String(prm_iv); 

     var encryptor = rj.CreateEncryptor(key, IV); 

     var msEncrypt = new MemoryStream(); 
     var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write); 

     var toEncrypt = Encoding.ASCII.GetBytes(sToEncrypt); 

     csEncrypt.Write(toEncrypt, 0, toEncrypt.Length); 
     csEncrypt.FlushFinalBlock(); 

     var encrypted = msEncrypt.ToArray(); 

     return (Convert.ToBase64String(encrypted)); 
    } 

主程序：

 Enc2.GenerateKeyIV(out key, out iv); 
     string encrypted_url = Enc2.Encrypt2("test tekst todo",key,iv); 
     Console.WriteLine(encrypted_url); 

==> IV = cCJNWmwOtIBg6zM7Mz/JQV/lcauNMWf50nQk1ZiEKZ4 =

==>键= gNDiEqWk7aGhj1 + A2EURW5CPurxHPcfy3F2FTa4peC0 =

==> System.Security.Cryptography.CryptographicException：指定的初始化向量（IV）不匹配该算法的块大小。

==>关键和iv似乎正确生成，我不明白为什么我收到此错误。

Answer 1

检查您的加密方法Enc2.Encrypt2()。它可能会使用与您在IV生成方法中指定的块大小不同的块大小。

UPDATE：

这样做：

public static string Encrypt2(string prm_text_to_encrypt, string prm_key, string prm_iv) 
{ 
     var sToEncrypt = prm_text_to_encrypt; 

     var rj = new RijndaelManaged() 
     { 
      Padding = PaddingMode.PKCS7, 
      Mode = CipherMode.CBC, 
      KeySize = 256, 
      BlockSize = 256, 
      //FeedbackSize = 256 
     }; 

     var key = Convert.FromBase64String(prm_key); 
     var IV = Convert.FromBase64String(prm_iv); 

     var encryptor = rj.CreateEncryptor(key, IV); 

     var msEncrypt = new MemoryStream(); 
     var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write); 

     var toEncrypt = Encoding.ASCII.GetBytes(sToEncrypt); 

     csEncrypt.Write(toEncrypt, 0, toEncrypt.Length); 
     csEncrypt.FlushFinalBlock(); 

     var encrypted = msEncrypt.ToArray(); 

     return (Convert.ToBase64String(encrypted)); 
}