public LicenseResult(byte[] licenseData, Client client)
{
try
{
var rsaSigner = new RSASigner();
//We always should have the same format
using (var sourceStream = new MemoryStream(licenseData))
using (var reader = new BinaryReader(sourceStream))
{
long dataLength = reader.ReadInt64();
byte[] data = reader.ReadBytes((int) dataLength);
byte[] sign = reader.ReadBytes((int) (licenseData.Length-8-dataLength));
var signBuffer = RSASigner.GetSignBuffer(data,new[]{BitConverter.GetBytes(DateTime.UtcNow.Year),client.GetSerialNumber()});
bool valid = rsaSigner.Validate(signBuffer, sign);
if (!valid)
throw new LicenseValidationException("License sign is invalid (maybe clock shifting)");
LicenseData = client.Decrypt(data);
}
}
catch (Exception e)
{
throw new LicenseException("License corrupted", e);
}
}
public LicenseResult(byte[] licenseData, Client client)
{
try
{
var rsaSigner = new RSASigner();
//We always should have the same format
using (var sourceStream = new MemoryStream(licenseData))
using (var reader = new BinaryReader(sourceStream))
{
long dataLength = reader.ReadInt64();
byte[] data = reader.ReadBytes((int)dataLength);
byte[] sign = reader.ReadBytes((int)(licenseData.Length - 8 - dataLength));
var signBuffer = RSASigner.GetSignBuffer(data, new[] { BitConverter.GetBytes(DateTime.UtcNow.Year), client.GetSerialNumber() });
bool valid = rsaSigner.Validate(signBuffer, sign);
if (!valid)
{
throw new LicenseValidationException("License sign is invalid (maybe clock shifting)");
}
LicenseData = client.Decrypt(data);
}
}
catch (Exception e)
{
throw new LicenseException("License corrupted", e);
}
}
private void Initialize(bool trylocal)
{
Errors = new HashSet <LicenseException>();
Warnings = new HashSet <LicenseException>();
try
{
_client = new Client();
//First try load from isolated store
byte[] licenseData;
if (trylocal)
{
try
{
using (var isoStore = IsolatedStorageFile.GetMachineStoreForAssembly())
using (
var file = new IsolatedStorageFileStream(_client.GetSerialNumber().Encode(),
FileMode.Open,
isoStore))
{
var dataTs = new byte[8];
file.Read(dataTs, 0, dataTs.Length);
var dateTime = BitConverter.ToInt64(dataTs, 0);
if (dateTime > DateTime.UtcNow.Ticks)
{
throw new LicenseException("Time shifting detected");
}
licenseData = file.ReadAllBytes(false);
}
ValidateLicense(licenseData);
}
catch (LicenseException e)
{
Warnings.Add(new LicenseException("Failed to load offline license", e));
}
catch (IOException e)
{
Warnings.Add(new LicenseException("Failed to access offline storage", e));
}
}
if (_info == null || !_info.IsValid())
{
var request = new LicenseRequest(RequestType.License,
_client.GetSerialNumber(),
null,
null);
licenseData = request.ToWebRequest(_client).GetResponse().GetResponseStream().ReadAllBytes();
ValidateLicense(licenseData);
}
}
catch (LicenseException e)
{
Errors.Add(e);
}
catch (WebException e)
{
try
{
var response = Encoding.UTF8.GetString(e.Response.GetResponseStream().ReadAllBytes());
Errors.Add(new LicenseException(response, e));
}
catch (Exception)
{
Errors.Add(new LicenseException("Can't read server error", e));
}
}
catch (Exception e)
{
Errors.Add(new LicenseException("License error", e));
}
}