An open license manager written in c++
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Maximilien Siavelis
Maximilien Siavelis adding an example
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LICENSE initial project import Apr 13, 2014 adding an example Jan 14, 2018

Open License Manager

Build Status

A lincense manager written in C/C++ for Windows and Linux environments.

It allows to protect the software you develop from unauthorized copies, limit the usage in time, to a specific set of machines, or prevent the usage in virtualized environments. It is an Open License Manager that helps to keep your software closed ;-)

The software is made by 2 main sub-components:

  • a C library with no (or minimal) external dependencies (the part you have to integrate in your software).
  • a license generator written in C++ (allows you to generate a license).

these modules are planned....

  • a license backoffice in php (in order to handle multiple licenses).
  • a license debugger to be sent to the final customer when there are licensing problems.
  • a log decriptor in order to decrypt logs generated by the license system.

You can notice 2 more sub-projects:

  • bootstrap: allows to generate private keys and modify the library on the fly after the downloading.
  • testing : runs the tests (and publish the results on cdash)


The project comes out with a very large freedom of use for everyone (and it will always be). It uses a BSD 3 clauses licensing schema.

How to build


GCC (Linux), MINGW or MSVC (Windows) cmake, boost, openssl (Linux/MINGW)

git clone
cd open-license-manager/
mkdir build
cd build

on Linux

cmake .. -DCMAKE_INSTALL_PREFIX=../install
make install

on Windows (with MSVC 2010)

cmake .. -G "Visual Studio 10 2010 Win64" -DCMAKE_INSTALL_PREFIX=../install
cmake --build . --target install --config Release

cross compile with MINGW on Linux

x86_64-w64-mingw32.static-cmake .. -DCMAKE_INSTALL_PREFIX=../install
make install

How to test

on Linux

make test

on Windows (MSVC)

ctest -C Release

How to use

This simple example shows how to integrate open-licence-manager into your project

$ cd example
$ cmake .
$ make
$ ./example
license ERROR :
    license file not found
the pc signature is :
$ ../install/bin/license_generator example -s Jaaa-aaaa-MG9F-ZhBB -o example.lic 
$ ./example
licence OK