Very simple library used to sign and verify text files. Based on example by Ian Bull.
Requires CMake and OpenSSL. Tested on Windows with MSVC 2013 and Linux with GCC 5.5.
$ echo "Hello World!" > world.txt
$ rsa-generate my 4096
$ rsa-sign my_private.pem world.txt
$ rsa-verify my_public.pem world.txt
Valid signature!