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 static LicenseResult FromOfflineString(string offlineString, Client client)
{
return new LicenseResult(DataEncoder.FromHexString(offlineString),client);
}
