Mono.Security.Cryptography RijndaelManaged类问题使用CFB-8模式

我写这封信是为了报告密码问题。使用

System.Security.Cryptography

中的

RijndaelManaged

类发生问题。使用

RijndaelManaged

和

CFB-8

（FeedbackSize=8）模式而不填充（

PaddingMode.None

）对我来说很重要。这样的设置配置使加密的数据大小等于解密的数据大小

不幸的是，Mono（针对MVS2010 IDE v2.0.8152的Mono编译器）编译的代码在数据加密时引发异常，消息为：

[Unhandled Exception: System.Security.Cryptography.CryptographicException: invalid block length at Mono.Security.Cryptography.SymmetricTransform.FinalEncrypt]. 

我在Windows XP和Windows 7下使用.NET framework 4.0进行了测试，使用的是本机Visual Studio 2010编译器。我发现本机Microsoft.NET编译器不会抛出任何异常，代码示例运行良好

下面我粘贴了两个示例（复制代码），一个用于引发异常的Mono，另一个用于本机C#编译器。在本例中，没有异常。此外，我还粘贴了在线编译器的链接以测试代码

为什么Mono编译器会引发此异常？

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单代码示例（用于测试的在线编译器）

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本机C#代码示例（用于测试的在线编译器）

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该错误已修复。这些源代码可以从MonoGit存储库中获取

母版：e094d3dc0cf186f1de32d5340d847dc18aeca0e2

---

mono-2-10:98e4842eb19dfd60000ada19e9bfb265fad7c84b

您知道修复的bug ID是什么吗？

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;

namespace Dela.Mono.Examples
{
   public class HelloWorld
   {
      public static void Main(string[] args)
      {
         string plainText = "This will be encrypted.";
            string plainText2 = "";

            RijndaelManaged aesAlg = new RijndaelManaged();

            aesAlg.BlockSize = 128;
            aesAlg.KeySize = 256;
            aesAlg.Mode = CipherMode.CFB;
            aesAlg.FeedbackSize = 8;
            aesAlg.Padding = PaddingMode.None;

            aesAlg.GenerateKey();
            aesAlg.GenerateIV();

            ICryptoTransform encryptor = aesAlg.CreateEncryptor();

            MemoryStream msEncrypt = new MemoryStream();
            using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) {
                using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) {
                    swEncrypt.Write(plainText);
                }
            }

            Console.WriteLine(msEncrypt.ToArray().Length); 
            Console.WriteLine(System.Text.Encoding.UTF8.GetString(msEncrypt.ToArray()));

            byte[] customArray = msEncrypt.ToArray();

            ICryptoTransform decryptor = aesAlg.CreateDecryptor();

            MemoryStream msDecrypt = new MemoryStream(customArray);
            using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) {
                using (StreamReader swDecrypt = new StreamReader(csDecrypt)) {
                    plainText2 = swDecrypt.ReadToEnd();
                }
            }

            Console.WriteLine(plainText2.Length); 
            Console.WriteLine(plainText2);


      }
   } 
}

// Rextester.Program.Main is the entry point for your code. Don't change it.

using System;
using System.IO;
using System.Text;
using System.Security.Cryptography;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            string plainText = "This will be encrypted.";
            string plainText2 = "";

            RijndaelManaged aesAlg = new RijndaelManaged();

            aesAlg.BlockSize = 128;
            aesAlg.KeySize = 256;
            aesAlg.Mode = CipherMode.CFB;
            aesAlg.FeedbackSize = 8;
            aesAlg.Padding = PaddingMode.None;

            aesAlg.GenerateKey();
            aesAlg.GenerateIV();

            ICryptoTransform encryptor = aesAlg.CreateEncryptor();

            MemoryStream msEncrypt = new MemoryStream();
            using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) {
                using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) {
                    swEncrypt.Write(plainText);
                }
            }

            Console.WriteLine(msEncrypt.ToArray().Length); 
            Console.WriteLine(System.Text.Encoding.UTF8.GetString(msEncrypt.ToArray()));

            byte[] customArray = msEncrypt.ToArray();

            ICryptoTransform decryptor = aesAlg.CreateDecryptor();

            MemoryStream msDecrypt = new MemoryStream(customArray);
            using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) {
                using (StreamReader swDecrypt = new StreamReader(csDecrypt)) {
                    plainText2 = swDecrypt.ReadToEnd();
                }
            }

            Console.WriteLine(plainText2.Length); 
            Console.WriteLine(plainText2);
        }
    }
}