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

namespace LMS.Common.RSAKey
{
    public static class AESGenerate
    {

        public static string Encrypt(string plainText, byte[] key, byte[] iv)
        {
            using Aes aesAlg = Aes.Create();
            aesAlg.Key = key;
            aesAlg.IV = iv; // 使用全零的IV,实际使用时应该使用随机IV

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

            byte[] encrypted = encryptor.TransformFinalBlock(Encoding.UTF8.GetBytes(plainText), 0, plainText.Length);

            return Convert.ToBase64String(encrypted);
        }

        public static string Decrypt(string cipherText, byte[] key, byte[] iv)
        {
            using Aes aesAlg = Aes.Create();
            aesAlg.Key = key;
            aesAlg.IV = iv; // 使用全零的IV,需要与加密时使用的IV一致

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

            byte[] cipher = Convert.FromBase64String(cipherText);
            byte[] decrypted = decryptor.TransformFinalBlock(cipher, 0, cipher.Length);

            return Encoding.UTF8.GetString(decrypted);
        }

    }
}