BasicAuthentication.cpp

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/*
 * SNode.C - a slim toolkit for network communication
 * Copyright (C) Volker Christian <me@vchrist.at>
 *               2020, 2021, 2022, 2023, 2024, 2025
 * Json Middleware 2020, 2021 Marlene Mayr, Anna Moser, Matteo Prock, Eric Thalhammer
 * Github <MarleneMayr><moseranna><MatteoMatteoMatteo><peregrin-tuk>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "express/middleware/BasicAuthentication.h"
 
#ifndef DOXYGEN_SHOULD_SKIP_THIS
 
#include "utils/base64.h"
#include "web/http/http_utils.h"
 
#include <list>
#include <utility>
 
#endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
namespace express::middleware {
 
    BasicAuthentication::BasicAuthentication(const std::string& userName, const std::string& password, const std::string& realm) {
        std::string userNamePassword = userName + ":" + password;
        const std::string credentials =
            base64::base64_encode(reinterpret_cast<unsigned char*>(userNamePassword.data()), userNamePassword.length());
 
        use([realm, credentials] MIDDLEWARE(req, res, next) {
            const std::string authCredentials = httputils::str_split(req->get("Authorization"), ' ').second;
 
            if (authCredentials == credentials) {
                next();
            } else {
                if (authCredentials.empty()) {
                    res->set("WWW-Authenticate", "Basic realm=\"" + realm + "\"");
                }
                res->sendStatus(401);
            }
        });
    }
 
    class BasicAuthentication&
    BasicAuthentication::instance(const std::string& userName, const std::string& password, const std::string& realm) {
        // Keep the created authentication middleware alive
        static std::list<std::shared_ptr<class BasicAuthentication>> basicAuthentications;
 
        BasicAuthentication* basicAuthentication = new BasicAuthentication(userName, password, realm);
        basicAuthentications.push_back(std::shared_ptr<BasicAuthentication>(basicAuthentication));
 
        return *basicAuthentication;
    }
 
    class BasicAuthentication& BasicAuthentication(const std::string& userName, const std::string& password, const std::string& realm) {
        return BasicAuthentication::instance(userName, password, realm);
    }
 
} // namespace express::middleware