libsoup comes with TLS support provided by glib-networking. This has multiple backends including gnutls (default on all platforms), SChannel on Windows, or OpenSSL. This makes use of the SoupMessage::accept-certificate signal. message); g_error_free (error); return; } SoupSession *session = soup_session_new_with_options ("tls-database", tls_db, NULL); g_object_unref (tls_db); }]]> message); g_error_free (error); return 1; } SoupSession *session = soup_session_new (); SoupMessage *msg = soup_message_new ("GET", "https://example.org"); /* We can set the certificate ahead of time if we already have one */ // soup_message_set_tls_client_certificate (msg, client_cert) /* However we can also dynamically request one which is useful in * applications that show a graphical prompt for example. */ g_signal_connect (msg, "request-certificate", G_CALLBACK (on_request_certificate), client_cert); // Send the message... g_object_unref (msg); g_object_unref (session); g_object_unref (client_cert); return 0; }]]>