How to encrypt and decrypt a file with Qt/C++?

Question

I want to create a program, which can encrypt and decrypt a complete file with an individual password. Is there any way to manage this in Qt and/or C++ and how?

Answer 1

Old, I know, but try Botan. It's actually used internally by Qt Creator 2.0. If you download the Qt Creator 2.0 sources you can find a copy of Botan 1.8.8 all set up for the Qt build system (qmake).