要快速入门C#对称加密,你可以使用.NET Framework中的System.Security.Cryptography
命名空间提供的类来实现。以下是一个简单的示例代码,演示如何使用AES算法进行对称加密和解密:
using System;
using System.Security.Cryptography;
using System.Text;
class Program
{
static void Main()
{
string plainText = "Hello, world!";
string key = "0123456789abcdef"; // 16字节的AES密钥
string iv = "abcdef9876543210"; // 16字节的初始化向量
byte[] encryptedBytes = EncryptStringToBytes_Aes(plainText, key, iv);
string decryptedText = DecryptStringFromBytes_Aes(encryptedBytes, key, iv);
Console.WriteLine("Encrypted: " + Convert.ToBase64String(encryptedBytes));
Console.WriteLine("Decrypted: " + decryptedText);
}
static byte[] EncryptStringToBytes_Aes(string plainText, string key, string iv)
{
byte[] encrypted;
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = Encoding.UTF8.GetBytes(iv);
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msEncrypt = new MemoryStream())
{
using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
encrypted = msEncrypt.ToArray();
}
}
}
return encrypted;
}
static string DecryptStringFromBytes_Aes(byte[] cipherText, string key, string iv)
{
string plaintext = null;
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Encoding.UTF8.GetBytes(key);
aesAlg.IV = Encoding.UTF8.GetBytes(iv);
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (MemoryStream msDecrypt = new MemoryStream(cipherText))
{
using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (StreamReader srDecrypt = new StreamReader(csDecrypt))
{
plaintext = srDecrypt.ReadToEnd();
}
}
}
}
return plaintext;
}
}
在这个示例中,我们使用了AES算法来加密和解密字符串。你可以根据自己的需求调整密钥和初始化向量的长度,并根据具体情况选择其他对称加密算法。希望这能帮助你快速入门C#对称加密。