Password-hashing with bcrypt for Qt/C++.
QtBCrypt allows you to hash your passwords (or, any string, really), using the bcrypt password-hashing algorithm. This is a C++ class meant to be used in Qt projects. However, very little of it is Qt-dependent, so it can be adapted for general C/C++ use with minimal effort.
The core bcrypt implementation is provided by Openwall. The QtBCrypt class acts as a user-friendly wrapper.
Add the QtBCrypt.h and QtBCrypt.cpp files to your project. Also add the openwall_crypt/ directory and its contents to your project. Make sure your .pro file has entries to compile the newly added files.
#include "qtbcrypt.h"
QString salt = QtBCrypt::generateSalt();
QString hashedPassword = QtBCrypt::hashPassword("the-password", salt);This code has been tested on Win32 and Win64 with MinGW and MSVC2019. It has also been tested under Clang on Mac and gcc on Linux 32 and 64.
AFAIK, the Openwall code does not have a license and can be used freely. This project is under the MIT license.