[C#]AES128

using System;
using System.Security.Cryptography;
using System.Text;
using System.IO;
public class Test
{
    public static void Main()
    {
        //密码
        string password = "1234567890123456";
        //加密初始化向量
        string iv = "  ";
        string message = AESEncrypt("abcdefghigklmnopqrstuvwxyz0123456789", password, iv);
        Console.WriteLine(message);
        message = AESDecrypt("8Z3dZzqn05FmiuBLowExK0CAbs4TY2GorC2dDPVlsn/tP+VuJGePqIMv1uSaVErr", password, iv);
        Console.WriteLine(message);
    }
    /// <summary>
    /// AES加密
    /// </summary>
    /// <param name="text">加密字符</param>
    /// <param name="password">加密的密码</param>
    /// <param name="iv">密钥</param>
    /// <returns></returns>
    public static string AESEncrypt(string text, string password, string iv)
    {
        RijndaelManaged rijndaelCipher = new();
        rijndaelCipher.Mode = CipherMode.CBC;
        rijndaelCipher.Padding = PaddingMode.PKCS7;
        rijndaelCipher.KeySize = 128;
        rijndaelCipher.BlockSize = 128;
        byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(password);
        byte[] keyBytes = new byte[16];
        int len = pwdBytes.Length;
        if (len > keyBytes.Length) len = keyBytes.Length;
        System.Array.Copy(pwdBytes, keyBytes, len);
        rijndaelCipher.Key = keyBytes;
        byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
        rijndaelCipher.IV = new byte[16];
        ICryptoTransform transform = rijndaelCipher.CreateEncryptor();
        byte[] plainText = Encoding.UTF8.GetBytes(text);
        byte[] cipherBytes = transform.TransformFinalBlock(plainText, 0, plainText.Length);
        return Convert.ToBase64String(cipherBytes);
    }
    /// <summary>
    /// AES解密
    /// </summary>
    /// <param name="text"></param>
    /// <param name="password"></param>
    /// <param name="iv"></param>
    /// <returns></returns>
    public static string AESDecrypt(string text, string password, string iv)
    {
        RijndaelManaged rijndaelCipher = new RijndaelManaged();
        rijndaelCipher.Mode = CipherMode.CBC;
        rijndaelCipher.Padding = PaddingMode.PKCS7;
        rijndaelCipher.KeySize = 128;
        rijndaelCipher.BlockSize = 128;
        byte[] encryptedData = Convert.FromBase64String(text);
        byte[] pwdBytes = System.Text.Encoding.UTF8.GetBytes(password);
        byte[] keyBytes = new byte[16];
        int len = pwdBytes.Length;
        if (len > keyBytes.Length) len = keyBytes.Length;
        System.Array.Copy(pwdBytes, keyBytes, len);
        rijndaelCipher.Key = keyBytes;
        byte[] ivBytes = System.Text.Encoding.UTF8.GetBytes(iv);
        rijndaelCipher.IV = ivBytes;
        ICryptoTransform transform = rijndaelCipher.CreateDecryptor();
        byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
        return Encoding.UTF8.GetString(plainText);
    }
}