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// This test case fails unless an implementation of TLS backend is installed.
// (Exception caught: TLS support is not available.)
// Module glib-networking implements TLS backend.
//
// Even if glib-networking is installed, it's possible that glib does not find it.
// That's very probable if glib and glib-networking are installed with different
// directory prefixes, e.g. glib in /opt/gnome and glib-networking in /usr.
// You can fix that by setting the GIO_EXTRA_MODULES environment variable to
// the directory to search for implementations of gio extension points.
// Example:
// export GIO_EXTRA_MODULES=/usr/lib/x86_64-linux-gnu/gio/modules
// If you don't know where the implementations of gio extension points are stored,
// search for a file named giomodule.cache.
//
// https://developer.gnome.org/gio/stable/extending-gio.html (G_TLS_BACKEND_EXTENSION_POINT_NAME)
// https://developer.gnome.org/gio/stable/gio-Extension-Points.html
// https://developer.gnome.org/gio/stable/gio-querymodules.html
#include <giomm.h>
#include <iostream>
#include <cstdlib>
bool on_accept_certificate(const Glib::RefPtr<const Gio::TlsCertificate>& cert, Gio::TlsCertificateFlags)
{
std::cout << "Handshake is ocurring." << std::endl
<< "The server is requesting that its certificate be accepted." <<
std::endl;
std::cout << "Outputing certificate data:" << std::endl <<
cert->property_certificate_pem().get_value();
Glib::RefPtr<const Gio::TlsCertificate> issuer = cert->get_issuer();
std::cout << "Outputing the issuer's certificate data:" << std::endl <<
issuer->property_certificate_pem().get_value();
std::cout << "Accepting the certificate (completing the handshake)." <<
std::endl;
return true;
}
int main(int, char**)
{
Gio::init();
const Glib::ustring test_host = "www.google.com";
std::vector< Glib::RefPtr<Gio::InetAddress> > inet_addresses;
try
{
inet_addresses =
Gio::Resolver::get_default()->lookup_by_name(test_host);
}
catch(const Gio::ResolverError& ex)
{
//This happens if it could not resolve the name,
//for instance if we are not connected to the internet.
//TODO: Change this test so it can do something useful and succeed even
//if the testing computer is not connected to the internet.
std::cerr << "Gio::Resolver::lookup_by_name() threw exception: " << ex.what() << std::endl;
return EXIT_FAILURE;
}
//Actually, it would throw an exception instead of reaching here with 0 addresses resolved.
if(inet_addresses.size() == 0)
{
std::cerr << "Could not resolve test host '" << test_host << "'." <<
std::endl;
return EXIT_FAILURE;
}
std::cout << "Successfully resolved address of test host '" << test_host <<
"'." << std::endl;
Glib::RefPtr<Gio::InetAddress> first_inet_address = inet_addresses[0];
std::cout << "First address of test host is " <<
first_inet_address->to_string() << "." << std::endl;
Glib::RefPtr<Gio::Socket> socket =
Gio::Socket::create(first_inet_address->get_family(),
Gio::SOCKET_TYPE_STREAM, Gio::SOCKET_PROTOCOL_TCP);
Glib::RefPtr<Gio::InetSocketAddress> address =
Gio::InetSocketAddress::create(first_inet_address, 443);
socket->connect(address);
if(!socket->is_connected())
{
std::cout << "Could not connect socket to " <<
address->get_address()->to_string() << ":" << address->get_port() <<
"." << std::endl;
}
Glib::RefPtr<Gio::TcpConnection> conn = Glib::RefPtr<Gio::TcpConnection>::cast_dynamic(Gio::SocketConnection::create(socket));
if(!conn || !conn->is_connected())
{
std::cout << "Could not establish connection to " <<
address->get_address()->to_string() << ":" << address->get_port() <<
"." << std::endl;
socket->close();
return EXIT_FAILURE;
}
std::cout << "Successfully established connection to " <<
address->get_address()->to_string() << ":" << address->get_port() <<
"." << std::endl;
Glib::RefPtr<Gio::TlsClientConnection> tls_connection;
try
{
Glib::RefPtr<Gio::TlsClientConnection> tls_connection =
Gio::TlsClientConnection::create(conn, address);
tls_connection->signal_accept_certificate().connect(
sigc::ptr_fun(&on_accept_certificate));
tls_connection->handshake();
std::cout << "Attempting to get the issuer's certificate from the "
"connection." << std::endl;
Glib::RefPtr<Gio::TlsCertificate> issuer_certificate =
tls_connection->get_peer_certificate()->get_issuer();
if(!issuer_certificate)
{
std::cout << "Could not get the issuer's certificate of the peer." <<
std::endl;
return EXIT_FAILURE;
}
std::cout << "Successfully retrieved the issuer's certificate." <<
std::endl;
std::cout << "Attempting to use the connection's database." << std::endl;
Glib::RefPtr<Gio::TlsDatabase> database = tls_connection->get_database();
std::cout << "Looking up the certificate's issuer in the database." <<
std::endl;
Glib::RefPtr<Gio::TlsCertificate> db_certificate =
database->lookup_certificate_issuer(issuer_certificate);
if(!db_certificate)
{
std::cout << "The issuer's certificate was not found in the database." << std::endl;
}
else
{
std::cout << "Successfully found the issuer's certificate in the database." << std::endl;
}
}
catch (const Gio::TlsError& error)
{
std::cout << "Exception caught: " << error.what() << "." << std::endl;
return EXIT_FAILURE;
}
conn->close();
return EXIT_SUCCESS;
}
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