using System.Security.Cryptography;
using System.Text;namespace AESStu01;public class AesHelper
{// AES加密密鑰和向量（需要保密）  private static readonly string Key = "";//16長度字符串+數字混合private static readonly string IV = "";//16長度字符串+數字混合// 加密字節數組  public static byte[] Encrypt(byte[] plainBytes){using (Aes aesAlg = Aes.Create()){aesAlg.Key = Encoding.UTF8.GetBytes(Key);aesAlg.IV = Encoding.UTF8.GetBytes(IV);ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);using (MemoryStream msEncrypt = new MemoryStream()){using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)){csEncrypt.Write(plainBytes, 0, plainBytes.Length);csEncrypt.Close();}return msEncrypt.ToArray();}}}// 解密字節數組  public static byte[] Decrypt(byte[] cipherBytes){using (Aes aesAlg = Aes.Create()){aesAlg.Key = Encoding.UTF8.GetBytes(Key);aesAlg.IV = Encoding.UTF8.GetBytes(IV);ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);using (MemoryStream msDecrypt = new MemoryStream()){using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write)){csDecrypt.Write(cipherBytes, 0, cipherBytes.Length);csDecrypt.Close();}return msDecrypt.ToArray();}}}
}

測試

using AESStu01;var orginData = new byte[]
{1, 2, 3, 4, 5
};
Console.WriteLine("AES加密");
var enData = AesHelper.Encrypt(orginData);
Console.WriteLine("加密后的的數據");
Console.WriteLine(string.Join(",",enData));
var deData = AesHelper.Decrypt(enData);
Console.WriteLine("解密后的的數據");
Console.WriteLine(string.Join(",",deData));