/// <summary>
/// Ben deshifrimin e numrit serial qe eshte i ruajtur ne rregjistra nga versioni i plote ne
/// versionin DEMO
/// </summary>
/// <returns>numrin serial te deshifruar</returns>
private static string DecryptKeyFull()
{
try
{
int length = Convert.ToInt32(GetKeyValue("Vlera2"));
string keyFull = GetKeyValue(path, name);
Encoding ascii = Encoding.ASCII;
int nr;
// Bejme deshifrimin e numrit te dhomave qe jane ne program
string nrDhomash = keyFull.Substring(keyFull.Length - length, length);
string nrDhomashDec = "";
Byte[] encodedRoomCount = ascii.GetBytes(nrDhomash);
foreach (Byte b in encodedRoomCount)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr + 6) / 8) - 9
nr = Algebra.Substract(Algebra.Divide(Algebra.Sum(nr, 6, 59), 8, 59), 9, 59);
nrDhomashDec += Algebra.GetChar(nr).ToString();
}
// Bejme deshifrimin e kohes se ngarkimit te sistemit
string loadedSystemTime = keyFull.Substring(keyFull.Length - (4 + length), 4);
string systemTimeDec = "";
Byte[] systemTime = ascii.GetBytes(loadedSystemTime);
foreach (Byte b in systemTime)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr + 8) / 3) - 15
nr = Algebra.Substract(Algebra.Divide(Algebra.Sum(nr, 6, 59), 3, 59), 15, 59);
systemTimeDec += Algebra.GetChar(nr).ToString();
}
// Bejme deshifrimin e numrit serial te sistemit
string systemSerial = keyFull.Substring(0, 10);
string systemSerialDec = "";
Byte[] encodedSystemSerial = ascii.GetBytes(systemSerial);
foreach (Byte b in encodedSystemSerial)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr - 7) / 10) + 2
nr = Algebra.Sum(Algebra.Divide(Algebra.Substract(nr, 7, 59), 10, 59), 2, 59);
systemSerialDec += Algebra.GetChar(nr).ToString();
}
// Bejme deshifrimin e numrit serial te hard diskut
string hardDiskSerial = keyFull.Substring(10, keyFull.Length - (4 + length + 10));
string hardDiskSerialDec = "";
Byte[] encodedHDSerial = ascii.GetBytes(hardDiskSerial);
int i = 0;
foreach (Byte b in encodedHDSerial)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr - ((i * 3) + 3) / 7) - 6
nr = Algebra.Substract(Algebra.Divide(Algebra.Substract(nr,
Algebra.Sum(Algebra.Multiply(i, 3, 59), 3, 59), 59), 7, 59), 6, 59);
hardDiskSerialDec += Algebra.GetChar(nr).ToString();
i++;
}
int numerDhomash = Convert.ToInt32(nrDhomashDec);
numerDhomash = (numerDhomash + 4) * 3;
// Tani bashkojme vlerat e gjetura nga deshifrimet e mesiperme dhe e kthejme kete vlere
return(systemSerialDec + hardDiskSerialDec + systemTimeDec + "-" + numerDhomash.ToString());
}
catch (Exception ex)
{
return("");
}
}
private static string EncryptKeyFull()
{
string keyDemo = GetKeyValue(path, name);
Encoding ascii = Encoding.ASCII;
string[] split = keyDemo.Split(new char[] { '-' });
// Nese gjendet me shume se nje vize atehere vlerat e rregjistrave nuk jane ne rregull.
// Ne kete rast kthe null
if (split.Length != 2)
{
return(null);
}
// Nese numri i dhomave nuk plotpjesetohet me 3 atehere ai eshte modifikuar jashte programit.
// Kthe vlere null edhe ne kete rast
if ((Convert.ToInt32(split[1]) % 3) != 0)
{
return(null);
}
int roomCount = (Convert.ToInt32(split[1]) / 3) - 4;
// Tani bejme kriptimin e numrit te dhomave
Byte[] encodedRoomCount = ascii.GetBytes(roomCount.ToString());
int nr;
string nrDhomash = "";
foreach (Byte b in encodedRoomCount)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr + 9) * 8) - 6 ne Z(59)
nr = Algebra.Substract(Algebra.Multiply(Algebra.Sum(nr, 9, 59), 8, 59), (6), 59);
nrDhomash += Algebra.GetChar(nr).ToString();
}
// Bejme kriptimin e kohes kur eshte ngarkuar sistemi
string loadedSystemTime = split[0].Substring(split[0].Length - 4, 4);
Byte[] systemTime = ascii.GetBytes(loadedSystemTime);
string encodedSystemTime = "";
foreach (Byte b in systemTime)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr + 15) * 3) - 8
nr = Algebra.Substract(Algebra.Multiply(Algebra.Sum(nr, 15, 59), 3, 59), 6, 59);
encodedSystemTime += Algebra.GetChar(nr).ToString();
}
// Bejme kriptimin e numrit serial te Windows-it
string systemSerial = split[0].Substring(0, 10);
Byte[] encodedSystemSerial = ascii.GetBytes(systemSerial);
string systemSerialEnc = "";
foreach (Byte b in encodedSystemSerial)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr - 2) * 10) + 7
nr = Algebra.Sum(Algebra.Multiply(Algebra.Substract(nr, 2, 59), 10, 59), 7, 59);
systemSerialEnc += Algebra.GetChar(nr);
}
// Bejme kriptimin e ID-se se hardDiskut
string hardDisk = split[0].Substring(10, split[0].Length - 14);
Byte[] encodedHardDiskID = ascii.GetBytes(hardDisk);
string hardDiskIDEnc = "";
int i = 0;
foreach (Byte b in encodedHardDiskID)
{
nr = Algebra.GetIndex(Convert.ToChar(b));
// Bejme kete veprim: ((nr + 6) * 7) + ((i * 3) + 3)
nr = Algebra.Sum(Algebra.Multiply(Algebra.Sum(nr, 6, 59), 7, 59),
Algebra.Sum(Algebra.Multiply(i, 3, 59), 3, 59), 59);
hardDiskIDEnc += Algebra.GetChar(nr);
i++;
}
// Ne kete pike vendosim te gjitha vlerat e nxjerra nga kriptimi, bashke
return(systemSerialEnc + hardDiskIDEnc + encodedSystemTime + nrDhomash);
// return keyDemo;
}