对称加密/解密.NET [英] Symmetric encrypt/decrypt in .NET

问题描述

我在C＃中的对称加密/解密程序之后。我知道已经有关于这一主题之前的几个问题，但大部分的答案似乎是关于加密的理念，而不是让实际的code。

I am after a symmetric encryption/decryption routine in C#. I know there have been a few questions on this topic before, but most of the answers seem to be about the philosophy of encryption rather than giving actual code.

更新：我真的很想看到一些code，而不仅仅是链接。非常感谢！

Update: I'd really like to see some code, rather than just links. Many thanks!

推荐答案

看一下例子code在<一个底部href=\"http://msdn.microsoft.com/en-us/library/system.security.cryptography.aesmanaged.aesmanaged.aspx\">this页。

Look at the example code at the bottom of this page.

在这里复制粘贴吧：

int Rfc2898KeygenIterations= 100;
int AesKeySizeInBits = 128;
String Password = "VerySecret!";
byte[] Salt = new byte[16];
System.Random rnd = new System.Random(); 
rnd.NextBytes(Salt);
byte[] rawPlaintext = System.Text.Encoding.Unicode.GetBytes("This is all clear now!");
byte[] cipherText= null;
byte[] plainText= null;
using (Aes aes = new AesManaged())
{
    aes.Padding = PaddingMode.PKCS7;
    aes.KeySize = AesKeySizeInBits;
    int KeyStrengthInBytes= aes.KeySize/8;
    System.Security.Cryptography.Rfc2898DeriveBytes rfc2898 =
        new System.Security.Cryptography.Rfc2898DeriveBytes(Password, Salt, Rfc2898KeygenIterations);
    aes.Key = rfc2898.GetBytes(KeyStrengthInBytes);
    aes.IV = rfc2898.GetBytes(KeyStrengthInBytes);
    using (MemoryStream ms = new MemoryStream())
    {
        using (CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(), CryptoStreamMode.Write))
        {
            cs.Write(rawPlaintext, 0, rawPlaintext.Length);
        }
        cipherText= ms.ToArray();
    }

    using (MemoryStream ms = new MemoryStream())
    {
        using (CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(), CryptoStreamMode.Write))
        {
            cs.Write(cipherText, 0, cipherText.Length);
        }
        plainText = ms.ToArray();
    }
}
string s = System.Text.Encoding.Unicode.GetString(plainText);
Console.WriteLine(s);

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