C#DES加密解密的代码

以下是使用C#进行DES加密和解密的代码示例：

using System;
using System.Security.Cryptography;
using System.Text;

public class DESExample
{
    public static string Encrypt(string plainText, byte[] key, byte[] iv)
    {
        byte[] encrypted;

        using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
        {
            des.Key = key;
            des.IV = iv;

            ICryptoTransform encryptor = des.CreateEncryptor(des.Key, des.IV);

            using (var memoryStream = new System.IO.MemoryStream())
            {
                using (var cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
                {
                    using (var streamWriter = new System.IO.StreamWriter(cryptoStream))
                    {
                        streamWriter.Write(plainText);
                    }

                    encrypted = memoryStream.ToArray();
                }
            }
        }

        return Convert.ToBase64String(encrypted);
    }

    public static string Decrypt(string cipherText, byte[] key, byte[] iv)
    {
        byte[] decrypted;

        using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
        {
            des.Key = key;
            des.IV = iv;

            ICryptoTransform decryptor = des.CreateDecryptor(des.Key, des.IV);

            using (var memoryStream = new System.IO.MemoryStream(Convert.FromBase64String(cipherText)))
            {
                using (var cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
                {
                    using (var streamReader = new System.IO.StreamReader(cryptoStream))
                    {
                        decrypted = Encoding.UTF8.GetBytes(streamReader.ReadToEnd());
                    }
                }
            }
        }

        return Encoding.UTF8.GetString(decrypted);
    }
}

使用示例：

byte[] key = Encoding.UTF8.GetBytes("01234567");
byte[] iv = Encoding.UTF8.GetBytes("abcdefgh");

string plainText = "Hello, World!";

string encryptedText = DESExample.Encrypt(plainText, key, iv);
Console.WriteLine($"Encrypted: {encryptedText}");

string decryptedText = DESExample.Decrypt(encryptedText, key, iv);
Console.WriteLine($"Decrypted: {decryptedText}");