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

问题描述

我正在使用 C# 中的对称加密/解密例程.我知道之前有一些关于这个主题的问题，但大多数答案似乎是关于加密的哲学而不是提供实际代码.

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代码，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

看此页面.

复制粘贴到这里:

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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