openmw-tes3mp/apps/master/SimpleWeb/https_server.hpp

#pragma once

#include "base_server.hpp"

#ifdef USE_STANDALONE_ASIO
#include <asio/ssl.hpp>
#else
#include <boost/asio/ssl.hpp>
#endif

#include <algorithm>
#include <openssl/ssl.h>

namespace SimpleWeb {
    using HTTPS = asio::ssl::stream<asio::ip::tcp::socket>;

    template <>
    class Server<HTTPS> : public ServerBase<HTTPS> {
        std::string session_id_context;
        bool set_session_id_context = false;

    public:
        Server(const std::string &cert_file, const std::string &private_key_file, const std::string &verify_file = std::string())
                : ServerBase<HTTPS>::ServerBase(443), context(asio::ssl::context::tlsv12) {
            context.use_certificate_chain_file(cert_file);
            context.use_private_key_file(private_key_file, asio::ssl::context::pem);

            if(verify_file.size() > 0) {
                context.load_verify_file(verify_file);
                context.set_verify_mode(asio::ssl::verify_peer | asio::ssl::verify_fail_if_no_peer_cert | asio::ssl::verify_client_once);
                set_session_id_context = true;
            }
        }

        void start() override {
            if(set_session_id_context) {
                // Creating session_id_context from address:port but reversed due to small SSL_MAX_SSL_SESSION_ID_LENGTH
                session_id_context = std::to_string(config.port) + ':';
                session_id_context.append(config.address.rbegin(), config.address.rend());
                SSL_CTX_set_session_id_context(context.native_handle(), reinterpret_cast<const unsigned char *>(session_id_context.data()),
                                               std::min<size_t>(session_id_context.size(), SSL_MAX_SSL_SESSION_ID_LENGTH));
            }
            ServerBase::start();
        }

    protected:
        asio::ssl::context context;

        void accept() override {
            auto session = std::make_shared<Session>(create_connection(*io_service, context));

            acceptor->async_accept(session->connection->socket->lowest_layer(), [this, session](const error_code &ec) {
                auto lock = session->connection->handler_runner->continue_lock();
                if(!lock)
                    return;

                if(ec != asio::error::operation_aborted)
                    this->accept();

                if(!ec) {
                    asio::ip::tcp::no_delay option(true);
                    error_code ec;
                    session->connection->socket->lowest_layer().set_option(option, ec);

                    session->connection->set_timeout(config.timeout_request);
                    session->connection->socket->async_handshake(asio::ssl::stream_base::server, [this, session](const error_code &ec) {
                        session->connection->cancel_timeout();
                        auto lock = session->connection->handler_runner->continue_lock();
                        if(!lock)
                            return;
                        if(!ec)
                            this->read_request_and_content(session);
                        else if(this->on_error)
                            this->on_error(session->request, ec);
                    });
                }
                else if(this->on_error)
                    this->on_error(session->request, ec);
            });
        }
    };
} // namespace SimpleWeb