/* * 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 2 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Author : Maxim Mamontov */ /* * This file contains a realization of radius data access plugin for Stargazer * * $Revision: 1.14 $ * $Date: 2009/12/13 14:17:13 $ * */ #include #include #include #include "stg/store.h" #include "stg/common.h" #include "stg/user_conf.h" #include "stg/user_property.h" #include "stg/plugin_creator.h" #include "radius.h" extern volatile time_t stgTime; //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- namespace { PLUGIN_CREATOR radc; void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password); void Decrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, unsigned long len8); void Encrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, unsigned long len8); } extern "C" PLUGIN * GetPlugin(); //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- PLUGIN * GetPlugin() { return radc.GetPlugin(); } //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- int RAD_SETTINGS::ParseServices(const std::vector & str, std::list * lst) { std::copy(str.begin(), str.end(), std::back_inserter(*lst)); std::list::iterator it(std::find(lst->begin(), lst->end(), "empty")); if (it != lst->end()) *it = ""; return 0; } //----------------------------------------------------------------------------- int RAD_SETTINGS::ParseSettings(const MODULE_SETTINGS & s) { int p; PARAM_VALUE pv; std::vector::const_iterator pvi; /////////////////////////// pv.param = "Port"; pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv); if (pvi == s.moduleParams.end()) { errorStr = "Parameter \'Port\' not found."; printfd(__FILE__, "Parameter 'Port' not found\n"); return -1; } if (ParseIntInRange(pvi->value[0], 2, 65535, &p)) { errorStr = "Cannot parse parameter \'Port\': " + errorStr; printfd(__FILE__, "Cannot parse parameter 'Port'\n"); return -1; } port = static_cast(p); /////////////////////////// pv.param = "Password"; pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv); if (pvi == s.moduleParams.end()) { errorStr = "Parameter \'Password\' not found."; printfd(__FILE__, "Parameter 'Password' not found\n"); return -1; } password = pvi->value[0]; /////////////////////////// pv.param = "AuthServices"; pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv); if (pvi != s.moduleParams.end()) { ParseServices(pvi->value, &authServices); } /////////////////////////// pv.param = "AcctServices"; pvi = std::find(s.moduleParams.begin(), s.moduleParams.end(), pv); if (pvi != s.moduleParams.end()) { ParseServices(pvi->value, &acctServices); } return 0; } //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- RADIUS::RADIUS() : ctx(), errorStr(), radSettings(), settings(), authServices(), acctServices(), sessions(), nonstop(false), isRunning(false), users(NULL), stgSettings(NULL), store(NULL), thread(), mutex(), sock(-1), packet(), logger(GetPluginLogger(GetStgLogger(), "radius")) { InitEncrypt(&ctx, ""); } //----------------------------------------------------------------------------- int RADIUS::ParseSettings() { int ret = radSettings.ParseSettings(settings); if (ret) errorStr = radSettings.GetStrError(); return ret; } //----------------------------------------------------------------------------- int RADIUS::PrepareNet() { sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { errorStr = "Cannot create socket."; logger("Cannot create a socket: %s", strerror(errno)); printfd(__FILE__, "Cannot create socket\n"); return -1; } struct sockaddr_in inAddr; inAddr.sin_family = AF_INET; inAddr.sin_port = htons(radSettings.GetPort()); inAddr.sin_addr.s_addr = inet_addr("0.0.0.0"); if (bind(sock, (struct sockaddr*)&inAddr, sizeof(inAddr)) < 0) { errorStr = "RADIUS: Bind failed."; logger("Cannot bind the socket: %s", strerror(errno)); printfd(__FILE__, "Cannot bind socket\n"); return -1; } return 0; } //----------------------------------------------------------------------------- int RADIUS::FinalizeNet() { close(sock); return 0; } //----------------------------------------------------------------------------- int RADIUS::Start() { std::string password(radSettings.GetPassword()); authServices = radSettings.GetAuthServices(); acctServices = radSettings.GetAcctServices(); InitEncrypt(&ctx, password); nonstop = true; if (PrepareNet()) { return -1; } if (!isRunning) { if (pthread_create(&thread, NULL, Run, this)) { errorStr = "Cannot create thread."; logger("Cannot create thread."); printfd(__FILE__, "Cannot create thread\n"); return -1; } } errorStr = ""; return 0; } //----------------------------------------------------------------------------- int RADIUS::Stop() { if (!IsRunning()) return 0; nonstop = false; std::map::iterator it; for (it = sessions.begin(); it != sessions.end(); ++it) { USER_PTR ui; if (users->FindByName(it->second.userName, &ui)) { users->Unauthorize(ui->GetLogin(), this); } } sessions.erase(sessions.begin(), sessions.end()); FinalizeNet(); if (isRunning) { //5 seconds to thread stops itself for (int i = 0; i < 25 && isRunning; i++) { struct timespec ts = {0, 200000000}; nanosleep(&ts, NULL); } } if (isRunning) return -1; return 0; } //----------------------------------------------------------------------------- void * RADIUS::Run(void * d) { sigset_t signalSet; sigfillset(&signalSet); pthread_sigmask(SIG_BLOCK, &signalSet, NULL); RADIUS * rad = (RADIUS *)d; RAD_PACKET packet; rad->isRunning = true; while (rad->nonstop) { if (!WaitPackets(rad->sock)) { continue; } struct sockaddr_in outerAddr; if (rad->RecvData(&packet, &outerAddr)) { printfd(__FILE__, "RADIUS::Run Error on RecvData\n"); } else { if (rad->ProcessData(&packet)) { packet.packetType = RAD_REJECT_PACKET; } rad->Send(packet, &outerAddr); } } rad->isRunning = false; return NULL; } //----------------------------------------------------------------------------- int RADIUS::RecvData(RAD_PACKET * packet, struct sockaddr_in * outerAddr) { int8_t buf[RAD_MAX_PACKET_LEN]; socklen_t outerAddrLen = sizeof(struct sockaddr_in); ssize_t dataLen = recvfrom(sock, buf, RAD_MAX_PACKET_LEN, 0, reinterpret_cast(outerAddr), &outerAddrLen); if (dataLen < 0) { logger("recvfrom error: %s", strerror(errno)); return -1; } if (dataLen == 0) return -1; Decrypt(&ctx, (char *)packet, (const char *)buf, dataLen / 8); if (strncmp((char *)packet->magic, RAD_ID, RAD_MAGIC_LEN)) { printfd(__FILE__, "RADIUS::RecvData Error magic. Wanted: '%s', got: '%s'\n", RAD_ID, packet->magic); return -1; } return 0; } //----------------------------------------------------------------------------- ssize_t RADIUS::Send(const RAD_PACKET & packet, struct sockaddr_in * outerAddr) { size_t len = sizeof(RAD_PACKET); char buf[1032]; Encrypt(&ctx, buf, (char *)&packet, len / 8); ssize_t res = sendto(sock, buf, len, 0, reinterpret_cast(outerAddr), sizeof(struct sockaddr_in)); if (res < 0) logger("sendto error: %s", strerror(errno)); return res; } //----------------------------------------------------------------------------- int RADIUS::ProcessData(RAD_PACKET * packet) { if (strncmp((const char *)packet->protoVer, "01", 2)) { printfd(__FILE__, "RADIUS::ProcessData packet.protoVer incorrect\n"); return -1; } switch (packet->packetType) { case RAD_AUTZ_PACKET: return ProcessAutzPacket(packet); case RAD_AUTH_PACKET: return ProcessAuthPacket(packet); case RAD_POST_AUTH_PACKET: return ProcessPostAuthPacket(packet); case RAD_ACCT_START_PACKET: return ProcessAcctStartPacket(packet); case RAD_ACCT_STOP_PACKET: return ProcessAcctStopPacket(packet); case RAD_ACCT_UPDATE_PACKET: return ProcessAcctUpdatePacket(packet); case RAD_ACCT_OTHER_PACKET: return ProcessAcctOtherPacket(packet); default: printfd(__FILE__, "RADIUS::ProcessData Unsupported packet type: %d\n", packet->packetType); return -1; }; } //----------------------------------------------------------------------------- int RADIUS::ProcessAutzPacket(RAD_PACKET * packet) { USER_CONF conf; if (!IsAllowedService((char *)packet->service)) { printfd(__FILE__, "RADIUS::ProcessAutzPacket service '%s' is not allowed to authorize\n", packet->service); packet->packetType = RAD_REJECT_PACKET; return 0; } if (store->RestoreUserConf(&conf, (char *)packet->login)) { packet->packetType = RAD_REJECT_PACKET; printfd(__FILE__, "RADIUS::ProcessAutzPacket cannot restore conf for user '%s'\n", packet->login); return 0; } // At this point service can be authorized at least // So we send a plain-text password packet->packetType = RAD_ACCEPT_PACKET; strncpy((char *)packet->password, conf.password.c_str(), RAD_PASSWORD_LEN); return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessAuthPacket(RAD_PACKET * packet) { USER_PTR ui; if (!CanAcctService((char *)packet->service)) { // There are no sense to check for allowed service // It has allready checked at previous stage (authorization) printfd(__FILE__, "RADIUS::ProcessAuthPacket service '%s' neednot stargazer authentication\n", (char *)packet->service); packet->packetType = RAD_ACCEPT_PACKET; return 0; } // At this point we have an accountable service // All other services got a password if allowed or rejected if (!FindUser(&ui, (char *)packet->login)) { packet->packetType = RAD_REJECT_PACKET; printfd(__FILE__, "RADIUS::ProcessAuthPacket user '%s' not found\n", (char *)packet->login); return 0; } if (ui->IsInetable()) { packet->packetType = RAD_ACCEPT_PACKET; } else { packet->packetType = RAD_REJECT_PACKET; } packet->packetType = RAD_ACCEPT_PACKET; return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessPostAuthPacket(RAD_PACKET * packet) { USER_PTR ui; if (!CanAcctService((char *)packet->service)) { // There are no sense to check for allowed service // It has allready checked at previous stage (authorization) packet->packetType = RAD_ACCEPT_PACKET; return 0; } if (!FindUser(&ui, (char *)packet->login)) { packet->packetType = RAD_REJECT_PACKET; printfd(__FILE__, "RADIUS::ProcessPostAuthPacket user '%s' not found\n", (char *)packet->login); return 0; } // I think that only Framed-User services has sense to be accountable // So we have to supply a Framed-IP USER_IPS ips = ui->GetProperty().ips; packet->packetType = RAD_ACCEPT_PACKET; // Additional checking for Framed-User service if (!strncmp((char *)packet->service, "Framed-User", RAD_SERVICE_LEN)) packet->ip = ips[0].ip; else packet->ip = 0; return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessAcctStartPacket(RAD_PACKET * packet) { USER_PTR ui; if (!FindUser(&ui, (char *)packet->login)) { packet->packetType = RAD_REJECT_PACKET; printfd(__FILE__, "RADIUS::ProcessAcctStartPacket user '%s' not found\n", (char *)packet->login); return 0; } // At this point we have to unauthorize user only if it is an accountable service if (CanAcctService((char *)packet->service)) { if (sessions.find((const char *)packet->sessid) != sessions.end()) { printfd(__FILE__, "RADIUS::ProcessAcctStartPacket session already started!\n"); packet->packetType = RAD_REJECT_PACKET; return -1; } USER_IPS ips = ui->GetProperty().ips; if (!users->Authorize(ui->GetLogin(), ips[0].ip, 0xffFFffFF, this)) { printfd(__FILE__, "RADIUS::ProcessAcctStartPacket cannot authorize user '%s'\n", packet->login); packet->packetType = RAD_REJECT_PACKET; return -1; } sessions[(const char *)packet->sessid].userName = (const char *)packet->login; sessions[(const char *)packet->sessid].serviceType = (const char *)packet->service; for_each(sessions.begin(), sessions.end(), SPrinter()); } else { printfd(__FILE__, "RADIUS::ProcessAcctStartPacket service '%s' can not be accounted\n", (char *)packet->service); } packet->packetType = RAD_ACCEPT_PACKET; return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessAcctStopPacket(RAD_PACKET * packet) { std::map::iterator sid; if ((sid = sessions.find((const char *)packet->sessid)) == sessions.end()) { printfd(__FILE__, "RADIUS::ProcessAcctStopPacket session had not started yet\n"); packet->packetType = RAD_REJECT_PACKET; return -1; } USER_PTR ui; if (!FindUser(&ui, sid->second.userName)) { packet->packetType = RAD_REJECT_PACKET; printfd(__FILE__, "RADIUS::ProcessPostAuthPacket user '%s' not found\n", sid->second.userName.c_str()); return 0; } sessions.erase(sid); users->Unauthorize(ui->GetLogin(), this); packet->packetType = RAD_ACCEPT_PACKET; return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessAcctUpdatePacket(RAD_PACKET * packet) { // Fake. May be use it later packet->packetType = RAD_ACCEPT_PACKET; return 0; } //----------------------------------------------------------------------------- int RADIUS::ProcessAcctOtherPacket(RAD_PACKET * packet) { // Fake. May be use it later packet->packetType = RAD_ACCEPT_PACKET; return 0; } //----------------------------------------------------------------------------- void RADIUS::PrintServices(const std::list & svcs) { for_each(svcs.begin(), svcs.end(), Printer()); } //----------------------------------------------------------------------------- bool RADIUS::FindUser(USER_PTR * ui, const std::string & login) const { if (users->FindByName(login, ui)) { return false; } return true; } //----------------------------------------------------------------------------- bool RADIUS::CanAuthService(const std::string & svc) const { return find(authServices.begin(), authServices.end(), svc) != authServices.end(); } //----------------------------------------------------------------------------- bool RADIUS::CanAcctService(const std::string & svc) const { return find(acctServices.begin(), acctServices.end(), svc) != acctServices.end(); } //----------------------------------------------------------------------------- bool RADIUS::IsAllowedService(const std::string & svc) const { return CanAuthService(svc) || CanAcctService(svc); } //----------------------------------------------------------------------------- namespace { inline void InitEncrypt(BLOWFISH_CTX * ctx, const std::string & password) { unsigned char keyL[RAD_PASSWORD_LEN]; // Пароль для шифровки memset(keyL, 0, RAD_PASSWORD_LEN); strncpy((char *)keyL, password.c_str(), RAD_PASSWORD_LEN); Blowfish_Init(ctx, keyL, RAD_PASSWORD_LEN); } //----------------------------------------------------------------------------- inline void Encrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, unsigned long len8) { // len8 - длина в 8-ми байтовых блоках if (dst != src) memcpy(dst, src, len8 * 8); for (size_t i = 0; i < len8; i++) Blowfish_Encrypt(ctx, static_cast(dst) + i * 2, static_cast(dst) + i * 2 + 1); } //----------------------------------------------------------------------------- inline void Decrypt(BLOWFISH_CTX * ctx, void * dst, const void * src, unsigned long len8) { // len8 - длина в 8-ми байтовых блоках if (dst != src) memcpy(dst, src, len8 * 8); for (size_t i = 0; i < len8; i++) Blowfish_Decrypt(ctx, static_cast(dst) + i * 2, static_cast(dst) + i * 2 + 1); } } // namespace anonymous