WPF实现AES加密算法

WPF可以使用.NET Framework提供的System.Security.Cryptography命名空间中的Aes类来实现AES加密算法。以下是一个简单的示例代码：

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Windows;

namespace WpfApp1
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void EncryptButton_Click(object sender, RoutedEventArgs e)
        {
            string plaintext = PlainTextBox.Text;
            string password = PasswordTextBox.Text;

            byte[] salt = new byte[16];
            using (RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider())
            {
                rngCsp.GetBytes(salt);
            }

            byte[] encrypted = EncryptStringToBytes_Aes(plaintext, password, salt);

            string base64Encrypted = Convert.ToBase64String(encrypted);
            string base64Salt = Convert.ToBase64String(salt);

            EncryptedTextBox.Text = base64Encrypted;
            SaltTextBox.Text = base64Salt;
        }

        private void DecryptButton_Click(object sender, RoutedEventArgs e)
        {
            string base64Encrypted = EncryptedTextBox.Text;
            string base64Salt = SaltTextBox.Text;
            string password = PasswordTextBox.Text;

            byte[] encrypted = Convert.FromBase64String(base64Encrypted);
            byte[] salt = Convert.FromBase64String(base64Salt);

            string plaintext = DecryptStringFromBytes_Aes(encrypted, password, salt);

            PlainTextBox.Text = plaintext;
        }

        static byte[] EncryptStringToBytes_Aes(string plaintext, string password, byte[] salt)
        {
            byte[] key = new Rfc2898DeriveBytes(password, salt, 1000).GetBytes(32);
            byte[] iv = new Rfc2898DeriveBytes(password, salt, 1000).GetBytes(16);

            byte[] encrypted;

            using (Aes aesAlg = Aes.Create())
            {
                aesAlg.Key = key;
                aesAlg.IV = 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[] encrypted, string password, byte[] salt)
        {
            byte[] key = new Rfc2898DeriveBytes(password, salt, 1000).GetBytes(32);
            byte[] iv = new Rfc2898DeriveBytes(password, salt, 1000).GetBytes(16);

            string plaintext = null;

            using (Aes aesAlg = Aes.Create())
            {
                aesAlg.Key = key;
                aesAlg.IV = iv;

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

                using (MemoryStream msDecrypt = new MemoryStream(encrypted))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                        {
                            plaintext = srDecrypt.ReadToEnd();
                        }
                    }
                }
            }

            return plaintext;
        }
    }
}

此代码使用用户提供的密码和随机生成的盐值对输入字符串进行AES加密，并将结果显示在界面上。用户可以将加密结果和盐值保存下来，并使用相同的密码和盐值对其进行解密。