Utils/AesUtils.cs

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using AppManager.Config;
using System;
using System.IO;
using System.Security.Cryptography;

namespace AppManager.Utils {
    internal static class AesUtils {
        private static readonly byte[] Key = Convert.FromBase64String(Configs.AesBase64Key);
        private static readonly byte[] Iv = Convert.FromBase64String(Configs.AesBase64Iv);
        public static string EntryptContent(string content) {
            using var aes = Aes.Create(); var encryptor = aes.CreateEncryptor(Key, Iv);
            {
                using var msEncrypt = new MemoryStream();
                using var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write); using (var swEncrypt = new StreamWriter(csEncrypt)) {
                    //Write all data to the stream.
                    swEncrypt.Write(content);
                }
                var encrypted = msEncrypt.ToArray();
                return Convert.ToBase64String(encrypted);
            }
        }

        public static string DecryptContent(string content) {
            using var aes = Aes.Create(); // Create a decryptor to perform the stream transform.
            var decryptor = aes.CreateDecryptor(Key, Iv);
            var cipherText = Convert.FromBase64String(content);
            // Create the streams used for decryption.
            using var msDecrypt = new MemoryStream(cipherText);
            using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read);
            using var srDecrypt = new StreamReader(csDecrypt);
            return srDecrypt.ReadToEnd();
        }
    }
}