public static bool Generate(string filename, string macAddress, DateTime expiration, int clientLicenseCount, string disabledFeatureList)
{
DateTime installDate = DateTime.Now;
string output = String.Concat(macAddress, "$", installDate.ToString(), "$", expiration.ToString(), "$", clientLicenseCount.ToString(), "$", disabledFeatureList, "$");
Random rand = new Random(DateTime.Now.Second);
for (int i = 0; i < 1024; i++)
{
char ch = (char)rand.Next('0', '9');
output = String.Concat(output, ch);
}
Int64 checksum = 0;
for (int i = 0; i < output.Length; i++)
{
checksum += Convert.ToInt64(Char.GetNumericValue(output[i]));
}
output = String.Concat(checksum.ToString(), "$", output);
output = MOG_Encryption.Encrypt(output);
return(DosUtils.FileWrite(filename, output));
}
public bool Load()
{
try
{
if (DosUtils.FileExistFast(mFilename))
{
string contents = DosUtils.FileRead(mFilename);
if (contents.Length > 0)
{
contents = MOG_Encryption.Decrypt(contents);
string[] parts = contents.Split("$".ToCharArray());
if (parts.Length >= 5)
{
Int64 savedChecksum = Int64.Parse(parts[0]);
mMacAddress = parts[1];
mInstallDate = DateTime.Parse(parts[2]);
mExpireDate = DateTime.Parse(parts[3]);
mClientLicenseCount = Int32.Parse(parts[4]);
if (parts.Length >= 6)
{
mDisabledFeatureList = parts[5];
}
//generate a new checksum and compare it with the one we saved out
contents = contents.Substring(parts[0].Length + 1);
Int64 checksum = 0;
for (int i = 0; i < contents.Length; i++)
{
checksum += Convert.ToInt64(Char.GetNumericValue(contents[i]));
}
if (savedChecksum == checksum)
{
mIsLoaded = true;
}
}
}
}
}
catch
{
mIsLoaded = false;
}
return(mIsLoaded);
}
