[C#/.NET] C#软件加密实例

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using System;
using System.IO;
using System.Security.Cryptography;


public class Program
{
    static byte[] key = new byte[32] { 0x2A, 0x6B, 0xC5, 0x8E, 0x32, 0xE9, 0xFA, 0x7D, 0x36, 0x40, 0xC3, 0xA2, 0x5F, 0x82, 0x47, 0x18, 0x4C, 0xBC, 0x9D, 0x7E, 0x3A, 0xF9, 0x60, 0x01, 0x55, 0x93, 0x28, 0xB6, 0x4F, 0x8A, 0x3C, 0xCE };
    static byte[] iv = new byte[16] { 0x75, 0x1A, 0x6D, 0x0B, 0xC5, 0x2F, 0x8A, 0x6D, 0x23, 0x84, 0x97, 0x13, 0xEC, 0x75, 0x29, 0x3F };


    public static void Main()
    {
        string inputFile = "plain.txt";
        string encryptedFile = "encrypted.dat";
        string decryptedFile = "decrypted.txt";


        EncryptFile(inputFile, encryptedFile);
        DecryptFile(encryptedFile, decryptedFile);


        Console.WriteLine("Encryption and decryption are complete.");
    }


    static void EncryptFile(string inputFile, string outputFile)
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = key;
            aes.IV = iv;


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


            using (FileStream inputFileStream = new FileStream(inputFile, FileMode.Open))
            using (FileStream outputFileStream = new FileStream(outputFile, FileMode.Create))
            using (CryptoStream cryptoStream = new CryptoStream(outputFileStream, encryptor, CryptoStreamMode.Write))
            {
                inputFileStream.CopyTo(cryptoStream);
            }
        }
    }


    static void DecryptFile(string inputFile, string outputFile)
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = key;
            aes.IV = iv;


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


            using (FileStream inputFileStream = new FileStream(inputFile, FileMode.Open))
            using (FileStream outputFileStream = new FileStream(outputFile, FileMode.Create))
            using (CryptoStream cryptoStream = new CryptoStream(inputFileStream, decryptor, CryptoStreamMode.Read))
            {
                cryptoStream.CopyTo(outputFileStream);
            }
        }
    }
}