Aes加密...缺少一个重要的部分 [英] Aes Encryption... missing an important piece

问题描述

我的静态加密类中有一个方法，如下所示：

  public static byte [] EncryptString（string toEncrypt ，byte [] encryptionKey）
 {
 var toEncryptBytes = Encoding.UTF8.GetBytes（toEncrypt）; 
 using（var provider = new AesCryptoServiceProvider（））
 {
 provider.Key = encryptionKey; 
 provider.Mode = CipherMode.ECB; 
 provider.Padding = PaddingMode.ISO10126; 
 using（var encryptor = provider.CreateEncryptor（provider.Key，provider.IV））
 {
 using（var ms = new MemoryStream（））
 {
使用（var cs = new CryptoStream（ms，encryptor，CryptoStreamMode.Write））
 {
 cs.Write（toEncryptBytes，0，toEncryptBytes.Length）; 
 cs.FlushFinalBlock（）; 
} 
 return ms.ToArray（）; 
} 
} 
} 
} 
  

有一个单元测试如下所示：

  [TestMethod] 
 public void EncryptStringEncryptsTest（）
 { 
 var toEncrypt =我要加密的文本; 
 var encryptionKey = Convert.FromBase64String（93mcgv9UBYpwgoUX0AXEaU1BqTCufPWPkFdOdoILLDA =）; 
 var encrypted = Encryption.EncryptString（toEncrypt，encryptionKey）; 
 
 var text = Convert.ToBase64String（encrypted）; 
 Assert.IsTrue（false）; 
} 
  

每次运行时， code>值更改。给予相同的投入，我希望它是不变的。我有错误的期望，或者我做错了吗？

解决方案

你的假设是不正确的。
$ b

ISO10126填充将附加随机数据以将消息填充到块大小的倍数。

I have a method in my static Encryption class that looks like this:

    public static byte[] EncryptString(string toEncrypt, byte[] encryptionKey)
    {
        var toEncryptBytes = Encoding.UTF8.GetBytes(toEncrypt);
        using (var provider = new AesCryptoServiceProvider())
        {
            provider.Key = encryptionKey;
            provider.Mode = CipherMode.ECB;
            provider.Padding = PaddingMode.ISO10126;
            using (var encryptor = provider.CreateEncryptor(provider.Key, provider.IV))
            {
                using (var ms = new MemoryStream())
                {
                    using (var cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
                    {
                        cs.Write(toEncryptBytes, 0, toEncryptBytes.Length);
                        cs.FlushFinalBlock();
                    }
                    return ms.ToArray();
                }
            }
        }
    }

I have a unit test that looks like this:

    [TestMethod]
    public void EncryptStringEncryptsTest()
    {
        var toEncrypt = "My text to encrypt";
        var encryptionKey = Convert.FromBase64String("93mcgv9UBYpwgoUX0AXEaU1BqTCufPWPkFdOdoILLDA=");
        var encrypted = Encryption.EncryptString(toEncrypt, encryptionKey);

        var text = Convert.ToBase64String(encrypted);
        Assert.IsTrue(false);
    }

Every time I run this, the text value changes. I would expect it to be constant, given the same inputs. Am I wrong to expect that, or am I doing something wrong?

解决方案

Your assumption is incorrect.

ISO10126 padding will append random data to pad your message to a multiple of the block size.

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