Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Set the peer verification mode.

boost::system::error_code set_verify_mode(
    verify_mode v,
    boost::system::error_code & ec);

This function may be used to configure the peer verification mode used by the context.

v: A bitmask of peer verification modes. The available verify_mode values are defined in the context_base class.
ec: Set to indicate what error occurred, if any.