在C#中實(shí)現(xiàn)對(duì)稱加密,你可以使用.NET框架自帶的System.Security.Cryptography命名空間中的類。以下是一個(gè)使用AES算法的簡(jiǎn)單示例:
首先,確保你已經(jīng)安裝了.NET Framework或.NET Core。
創(chuàng)建一個(gè)新的C#控制臺(tái)應(yīng)用程序項(xiàng)目。
在項(xiàng)目中添加以下命名空間引用:
using System;
using System.Text;
using System.Security.Cryptography;
class Program
{
static void Main(string[] args)
{
string plaintext = "Hello, World!";
string key = "ThisIsASecretKey!";
string ciphertext = Encrypt(plaintext, key);
Console.WriteLine("Plaintext: " + plaintext);
Console.WriteLine("Ciphertext: " + ciphertext);
string decryptedText = Decrypt(ciphertext, key);
Console.WriteLine("Decrypted Text: " + decryptedText);
}
static byte[] Encrypt(string plaintext, string key)
{
using (Aes aesAlg = Aes.Create())
{
byte[] keyBytes = Encoding.UTF8.GetBytes(key);
byte[] initVectorBytes = Encoding.UTF8.GetBytes("ThisIsASecretInitVector!");
aesAlg.Key = keyBytes;
aesAlg.IV = initVectorBytes;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (var msEncrypt = new System.IO.MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
{
using (var swEncrypt = new StreamWriter(csEncrypt))
{
swEncrypt.Write(plaintext);
}
}
return msEncrypt.ToArray();
}
}
}
static string Decrypt(byte[] cipherText, string key)
{
using (Aes aesAlg = Aes.Create())
{
byte[] keyBytes = Encoding.UTF8.GetBytes(key);
byte[] initVectorBytes = Encoding.UTF8.GetBytes("ThisIsASecretInitVector!");
aesAlg.Key = keyBytes;
aesAlg.IV = initVectorBytes;
ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
using (var msDecrypt = new System.IO.MemoryStream(cipherText))
{
using (var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
{
using (var srDecrypt = new StreamReader(csDecrypt))
{
return srDecrypt.ReadToEnd();
}
}
}
}
}
}
在這個(gè)示例中,我們使用了AES加密算法,并創(chuàng)建了一個(gè)簡(jiǎn)單的控制臺(tái)應(yīng)用程序來(lái)加密和解密字符串。請(qǐng)注意,為了簡(jiǎn)化示例,我們使用了一個(gè)固定的密鑰和初始化向量(IV)。在實(shí)際應(yīng)用中,你應(yīng)該使用更安全的方式來(lái)生成和存儲(chǔ)密鑰和IV。