function IsLicenseValid(const LicenseFilePath: string): Boolean; var LicenseStream: TFileStream; License: TLicenseData; DataToVerify: TBytes; StoredSignature: TBytes; PublicKey: TArray<Byte>; // embedded in your app's resources CurrentHardwareID: string; begin Result := False; if not FileExists(LicenseFilePath) then Exit; LicenseStream := TFileStream.Create(LicenseFilePath, fmOpenRead); try if LicenseStream.Read(License, SizeOf(TLicenseData)) <> SizeOf(TLicenseData) then Exit;
// Verify Magic Header if License.Magic <> $4C494345 then Exit; File Activation Delphi 2016
// Retrieve Volume Serial of C: WbemObjectSet := WbemServices.ExecQuery('SELECT VolumeSerialNumber FROM Win32_LogicalDisk WHERE DeviceID="C:"'); if WbemObjectSet.Count > 0 then VolumeId := WbemObjectSet.ItemIndex(0).VolumeSerialNumber; // Combine and hash HashBytes := THashSHA2.GetHashBytes(MacAddress + CpuId + VolumeId); Result := TNetEncoding.Base64.EncodeBytesToString(HashBytes); finally CoUninitialize; end; end; Define a record that holds license data. This will be serialized, signed, and saved to disk. Your app reads the license file, validates signature,
LicenseStream := TFileStream.Create(LicenseFile, fmCreate); try LicenseStream.WriteBuffer(License, SizeOf(TLicenseData)); finally LicenseStream.Free; end; end; This is the heart of the "File Activation Delphi 2016" process. Your app reads the license file, validates signature, and checks hardware binding. Your app reads the license file
Signature := TNetEncoding.Base64.Decode(RSA_Sign(DataToSign, PrivateKey)); // pseudo Move(Signature[0], License.Signature, Length(Signature));
// Recreate the data that was signed DataToVerify := BytesOf(License.UserName) + BytesOf(License.ProductCode) + BytesOf(License.ExpirationDate) + BytesOf(License.FeatureMask) + BytesOf(License.HardwareIDHash); SetLength(StoredSignature, SizeOf(License.Signature)); Move(License.Signature, StoredSignature[0], SizeOf(License.Signature));
// Retrieve MAC Address WbemObjectSet := WbemServices.ExecQuery('SELECT MACAddress FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled=True'); if WbemObjectSet.Count > 0 then MacAddress := WbemObjectSet.ItemIndex(0).MACAddress;