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[motaghred]

محتاج فهم الكود جزاكم الله خير 


 

=========================================================
using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Windows.Forms;
using LockingSystem;

// Token: 0x0200000C RID: 12
internal class Class6
{
    // Token: 0x06000076 RID: 118 RVA: 0x00008EEC File Offset: 0x000070EC
    internal static byte[] smethod_0(byte[] byte_0, byte[] byte_1)
    {
        byte[] array = null;
        byte[] array2 = new byte[] { 5, 6, 4, 8, 99, 55, 77, 99 };
        using (MemoryStream memoryStream = new MemoryStream())
        {
            using (RijndaelManaged rijndaelManaged = new RijndaelManaged())
            {
                rijndaelManaged.KeySize = 256;
                rijndaelManaged.BlockSize = 128;
                Rfc2898DeriveBytes rfc2898DeriveBytes = new Rfc2898DeriveBytes(byte_1, array2, 1000);
                rijndaelManaged.Key = rfc2898DeriveBytes.GetBytes(rijndaelManaged.KeySize / 8);
                rijndaelManaged.IV = rfc2898DeriveBytes.GetBytes(rijndaelManaged.BlockSize / 8);
                rijndaelManaged.Mode = CipherMode.CBC;
                using (CryptoStream cryptoStream = new CryptoStream(memoryStream, rijndaelManaged.CreateDecryptor(), CryptoStreamMode.Write))
                {
                    cryptoStream.Write(byte_0, 0, byte_0.Length);
                    cryptoStream.Close();
                }
                array = memoryStream.ToArray();
            }
        }
        return array;
    }

    // Token: 0x06000077 RID: 119 RVA: 0x00009000 File Offset: 0x00007200
    internal bool method_0(string string_3)
    {
        byte[] bytes = Encoding.ASCII.GetBytes(string_3);
        byte[] array = Convert.FromBase64String(this.string_0);
        byte[] array2 = null;
        try
        {
            array2 = Class6.smethod_0(array, bytes);
        }
        catch (CryptographicException)
        {
            return false;
        }
        if (array2 != null)
        {
            byte[] array3 = SHA1.Create().ComputeHash(array2);
            if (Convert.ToBase64String(array3) == this.string_1)
            {
                Class6.string_2 = Encoding.ASCII.GetString(array2);
                return true;
            }
        }
        return false;
    }

    // Token: 0x06000078 RID: 120 RVA: 0x00009094 File Offset: 0x00007294
    internal bool method_1()
    {
        for (;
        {
            EnterPassword enterPassword = new EnterPassword();
            enterPassword.ShowDialog();
            if (enterPassword.string_0 == null)
            {
                goto IL_47;
            }
            if (this.method_0(enterPassword.string_0))
            {
                break;
            }
            MessageBox.Show("Wrong password entered!", "Error!", MessageBoxButtons.OK, MessageBoxIcon.Hand);
        }
        return true;
        IL_47:
        return false;
    }

    // Token: 0x04000013 RID: 19
0000000000000000000000    internal string string_0 = "Id4lAZ35=";

    // Token: 0x04000014 RID: 20
00000000000000000000000    internal string string_1 = "bHodyO65UFMX=";

    // Token: 0x04000015 RID: 21
    internal static string string_2;

}