133 rindas
3.8 KiB
C++
133 rindas
3.8 KiB
C++
/* Copyright (c) 2018 Albert S.
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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#include <atomic>
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#include <mutex>
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#include <openssl/evp.h>
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#include "handlerlogin.h"
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#include "../logger.h"
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struct LoginFail
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{
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std::mutex mutex;
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std::atomic<unsigned int> count;
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time_t lastfail;
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};
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static std::map<std::string, LoginFail> loginFails;
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// TODO: make configurable
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bool HandlerLogin::isBanned(std::string ip)
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{
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if(utils::hasKey(loginFails, ip))
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{
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LoginFail &fl = loginFails[ip];
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std::lock_guard<std::mutex> lock(fl.mutex);
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return fl.count > 5 && (time(nullptr) - fl.lastfail) < 1200;
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}
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return false;
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}
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void HandlerLogin::incFailureCount(std::string ip)
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{
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LoginFail &fl = loginFails[ip];
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fl.count += 1;
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fl.lastfail = time(nullptr);
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}
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std::vector<char> HandlerLogin::pbkdf5(std::string password, const std::vector<char> &salt)
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{
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unsigned char hash[32];
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const EVP_MD *sha256 = EVP_sha256();
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const unsigned char *rawsalt = reinterpret_cast<const unsigned char *>(salt.data());
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PKCS5_PBKDF2_HMAC(password.c_str(), password.size(), rawsalt, salt.size(), 300000, sha256, sizeof(hash), hash);
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std::vector<char> result;
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for(size_t i = 0; i < sizeof(hash); i++)
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{
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result.push_back(static_cast<char>(hash[i]));
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}
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return result;
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}
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Response HandlerLogin::handleRequest(const Request &r)
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{
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auto createErrorReesponse = [&]() {
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return errorResponse("Login error", "The supplied credenetials are incorrect");
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};
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if(isBanned(r.getIp()))
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{
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return errorResponse("Banned", "You have been banned for too many login attempts. Try again later");
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}
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if(r.param("submit") == "1")
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{
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std::string password = r.post("password");
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std::string username = r.post("user");
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auto userDao = this->database->createUserDao();
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std::optional<User> user = userDao->find(username);
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if(!user)
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{
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return createErrorReesponse();
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}
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if(!user->enabled)
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{
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return errorResponse("Login failed", "The user account has been disabled");
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}
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auto hashresult = pbkdf5(password, user.value().salt);
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// TODO: timing attack
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if(hashresult == user.value().password)
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{
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loginFails.erase(r.getIp());
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Response r = Response::redirectTemporarily(urlProvider->index());
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*(this->userSession) = Session(user.value());
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return r;
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}
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else
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{
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// TODO: only if wanted by config
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incFailureCount(r.getIp());
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return createErrorReesponse();
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}
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// auto pbkdf5 = pbkdf5(password, user->)
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}
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std::string page = r.get("page");
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if(page.empty())
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page = "index";
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TemplatePage &loginTemplatePage = this->templ->getPage("login");
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setGeneralVars(loginTemplatePage);
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loginTemplatePage.setVar("loginurl", urlProvider->login(page));
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loginTemplatePage.setVar("title", createPageTitle("Login"));
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Response result;
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result.setStatus(200);
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result.setBody(loginTemplatePage.render());
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return result;
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}
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bool HandlerLogin::canAccess(const Permissions &perms)
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{
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return true;
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}
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