public Key(string licenseTemplate, Checksum.ChecksumType checksumAlgorithm)
{
ChecksumAlgorithm = checksumAlgorithm;
LicenseTemplate = licenseTemplate;
// create the random object
_rnd = new Random(unchecked((int)DateTime.Now.Ticks));
// initialzie the license key
_strLicensekey = string.Empty;
_tokens = new List<Token>();
}
/// <summary>
/// Get the checksum number so we can add it into the license key string.
/// </summary>
/// <param name="licensekey">The license key string.</param>
/// <param name="numberLength">The size of the field.</param>
/// <param name="includeLicensekey">Include the original license key as part of the return value.</param>
private string GetChecksumNumber(string licensekey, int numberLength, bool includeLicensekey)
{
//
// create the checksum class
//
var chk = new Checksum();
var remain = numberLength%4;
if (remain != 0)
{
throw new ApplicationException("For Bits values each block should be a multiple of 4");
}
numberLength = numberLength/4;
chk.ChecksumAlgorithm = ChecksumAlgorithm;
chk.CalculateChecksum(licensekey);
if (includeLicensekey)
{
var csum = chk.ChecksumNumber;
licensekey = licensekey + NumberDisplay.CreateNumberString(csum, numberLength);
}
else
{
var csum = chk.ChecksumNumber;
licensekey = NumberDisplay.CreateNumberString(csum, numberLength);
}
return licensekey;
}