CubexSoft2, C# - rextester

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

namespace Rextester
{
    public class Program
    {
        public static string EncryptString(string plainText, byte[] key, byte[] iv)
        {
            Aes encryptor = Aes.Create();
            encryptor.Mode = CipherMode.CBC;
            encryptor.Key = key;
            encryptor.IV = iv;
            MemoryStream memoryStream = new MemoryStream();
            ICryptoTransform aesEncryptor = encryptor.CreateEncryptor();

CryptoStream cryptoStream = new CryptoStream(memoryStream, aesEncryptor, CryptoStreamMode.Write);
            byte[] plainBytes = Encoding.ASCII.GetBytes(plainText);
            cryptoStream.Write(plainBytes, 0, plainBytes.Length);
            cryptoStream.FlushFinalBlock();
            byte[] cipherBytes = memoryStream.ToArray();

memoryStream.Close();
            cryptoStream.Close();
            string cipherText = Convert.ToBase64String(cipherBytes, 0, cipherBytes.Length);

return cipherText;
        }
        public static void Main(string[] args)
        {
            //Your code goes here
            byte[] bytes = Encoding.UTF8.GetBytes("Er#hq$lm*nWMaP#j");
			byte[] bytes2 = Encoding.UTF8.GetBytes("rWt*n#gqI$kMfuOM");

string lisans_bitis_tarihi = "01-01-2222"; //Lisans süresini değiştirebilirsiniz.
            string sabit1 = "All Mail Backup";
            string lisans_mail_adresi = "email@decompile.us"; //Lisans Mail Adresini Tanımlayabilirsiniz.
            
            //Lisanslardan herhangi birini kullanabilirsiniz.
            string lisans_enterprise = "Enterprise";
            string lisans_personal= "Personal";
            string lisans_technical = "Technical";
            Console.WriteLine("===================================================================================================================\n"+
                              "Lisans Bitiş Tarihi\t:"+lisans_bitis_tarihi+"\n"+
                              "Lisans Mail"+"\t\t:" + lisans_mail_adresi  + "\n" + 
                              "Enterprise Key"+"\t\t:" + EncryptString(lisans_bitis_tarihi + "#" + sabit1 + "#" + lisans_mail_adresi + "#" + lisans_enterprise + "#" + "All", bytes, bytes2) + "\n" + 
                              "Personal Key"+"\t\t:" + EncryptString(lisans_bitis_tarihi + "#" + sabit1 + "#" + lisans_mail_adresi + "#" + lisans_personal + "#" + "All", bytes, bytes2) + "\n" + 
                              "Technical Key"+"\t\t:" + EncryptString(lisans_bitis_tarihi + "#" + sabit1 + "#" + lisans_mail_adresi + "#" + lisans_technical + "#" + "All", bytes, bytes2)+ 
                              "\n===================================================================================================================");
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,23 sec, absolute running time: 0,13 sec, cpu time: 0,11 sec, average memory usage: 14 Mb, average nr of threads: 3, absolute service time: 0,39 sec