// Check the registry for valid date and serial number
public static bool CheckSerialNumberRegistry(string productName, string productSerialRegistry)
{
string nextDateCheck = CommonAttributes.LoadFromRegistry(CommonAttributes.RegNewDate);
DateTime RegKeyDate;
nextDateCheck = Encryption.Decrypt(nextDateCheck);
try
{
RegKeyDate = DateTime.ParseExact(nextDateCheck, "yyyyMMdd", System.Globalization.CultureInfo.GetCultureInfo("en-US"));
}
catch (Exception)
{
MessageBox.Show("Please provide Internet connection for validating your product");
return(false);
}
if ((RegKeyDate <= DateTime.Now) || (nextDateCheck == string.Empty) || (nextDateCheck == null))
{
MessageBox.Show("Please provide Internet connection for validating your product");
return(false);
}
// TO DO: check for trial period
string serialNumber = CommonAttributes.LoadSNFromRegistry(productSerialRegistry);
if (serialNumber == null) // In case of missing registry entry
{
MessageBox.Show("Corrupted installation found. Please reinstall " + productName + "!");
return(false);
}
// Trial mode or invalid serial number
if ((serialNumber == "0") || (serialNumber == string.Empty))
{
// Displays the trial message once a day
DisplayTrialMessage(productName, productSerialRegistry);
}
// If everything is ok program loading continues
return(true);
}
public static void CheckProgramState(string ProductID, string SerialNumberIn,
string RegSerialField, string ProductName, out Boolean AllowRun, out Boolean IsRegistered)
{
// cadbest.com/en/key.php?id=213&data2=1231321&.... - sample for parsing parameteres to the url
try
{
string userID, serialNumber;
string encrProductID, encrUserID, encrSerialNum;
// Get the serial number of C:\
userID = GetUserID();
// Get the serial number from registry if is not provided
if (string.IsNullOrEmpty(SerialNumberIn))
{
// From registry serial number is already encrypted
serialNumber = CommonAttributes.LoadSNFromRegistry(RegSerialField);
}
else
{
// When is passed from About or other module, it is not encrypted
serialNumber = SerialNumberIn;
}
//Encrypt the data
encrProductID = Encryption.Encrypt(ProductID, 150);
encrUserID = Encryption.Encrypt(userID, 200);
encrSerialNum = Encryption.Encrypt(serialNumber, 250);
using (WebClient client = new WebClient())
{
string responseStr;
NameValueCollection data = new NameValueCollection();
#if DEBUG
data[Parameter[0]] = encrUserID;
data[Parameter[1]] = encrSerialNum;
data[Parameter[2]] = encrProductID;
#else
data[Parameter[0]] = encrUserID;
data[Parameter[1]] = encrSerialNum;
data[Parameter[2]] = encrProductID;
#endif
// Send and recieve from the authorization url
Byte[] response = client.UploadValues(AuthURL.ToString(), "POST", data);
responseStr = System.Text.Encoding.UTF8.GetString(response);
// Replace <br /> with \n for proper work of StringReader
responseStr = responseStr.Replace("<br />", "\n");
// Reads the response string line by line
using (StringReader reader = new StringReader(responseStr))
{
string line;
//Initializing
AllowRun = false;
IsRegistered = false;
// Read "Should run" responce
line = reader.ReadLine();
#if DEBUG
// Check if the response string contains backslash
if (line.Contains("\\"))
{
MessageBox.Show("Response contains backslash\n" + line);
}
#endif
if (line != null)
{
DateTime nextCheck;
line = Encryption.Decrypt(line);
if (line[0] == SHOULDRUN)
{
AllowRun = true;
}
if (line[1] == ISREGISTERED)
{
IsRegistered = true;
}
if (AllowRun && IsRegistered) // Product works for 30 days
{
nextCheck = DateTime.Now.AddDays(30);
CommonAttributes.SaveNextDateReg(nextCheck);
}
// Product works in trial mode for 3 days until next check
else if (AllowRun && !IsRegistered)
{
nextCheck = DateTime.Now.AddDays(3);
CommonAttributes.SaveNextDateReg(nextCheck);
if ((SerialNumberIn == string.Empty) || (SerialNumberIn == null))
{
OfflineAuthorization.DisplayTrialMessage(ProductName, RegSerialField);
}
}
else if (!AllowRun) // The product is not registered and trial is over
{
#if DEBUG
using (StreamWriter fsParams = File.AppendText("C:\\params.txt"))
{
fsParams.WriteLine(string.Format("{0} = {1} = {2}", Parameter[0], encrUserID, userID));
fsParams.WriteLine(string.Format("{0} = {1} = {2}", Parameter[1], encrSerialNum, serialNumber));
fsParams.WriteLine(string.Format("{0} = {1} = {2}", Parameter[2], encrProductID, ProductID));
fsParams.WriteLine();
}
#endif
// Delete the corresponding registry, so program will not run next time in offline mode
CommonAttributes.DelKeyRegistry(CommonAttributes.RegNewDate);
// If any serial number was get from registry, which is validated as wrong,
// set the registry to "0", which means trial and allows entering a correct serial number
if ((SerialNumberIn == string.Empty) || (SerialNumberIn == null))
{
CommonAttributes.SaveToRegistry(RegSerialField, "0");
}
}
}
else
{
throw new GetResponceException();
}
// Reading of user data if is returned
while ((line = reader.ReadLine()) != null)
{
string fieldDelimiter, field;
int positionField;
fieldDelimiter = line.Substring(1, 2); // The delimiter which must be ::
field = line.Substring(3); // The remaining text
try
{
//positionField = int.Parse(String.Format("{0}", line[0]));
positionField = int.Parse(line.Substring(0, 1)); // The first character must be digit
if ((positionField >= 1) && (positionField <= 5) && (fieldDelimiter == "::"))
{
CommonAttributes.SaveToRegistry(RegIfnoCustomer[positionField - 1], field);
}
}
catch (FormatException) // If the first symbol is not a digit, do nothing
{
}
}
}
}
}
catch (Exception)
{
AllowRun = false;
IsRegistered = false;
}
}