...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Use an RSA private key from a file.
boost::system::error_code use_rsa_private_key_file( impl_type & impl, const std::string & filename, context_base::file_format format, boost::system::error_code & ec);