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Diffstat (limited to 'modules/sasl.cpp')
| -rw-r--r-- | modules/sasl.cpp | 396 |
1 files changed, 396 insertions, 0 deletions
diff --git a/modules/sasl.cpp b/modules/sasl.cpp new file mode 100644 index 000000000..b79c0972d --- /dev/null +++ b/modules/sasl.cpp @@ -0,0 +1,396 @@ +/* + * Anope IRC Services + * + * Copyright (C) 2014-2017 Anope Team <team@anope.org> + * + * This file is part of Anope. Anope 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, version 2. + * + * 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 see <http://www.gnu.org/licenses/>. + */ + +#include "module.h" +#include "modules/sasl.h" +#include "modules/nickserv/cert.h" +#include "modules/hostserv.h" + +using namespace SASL; + +class Plain : public Mechanism +{ + public: + Plain(SASL::Service *s, Module *o) : Mechanism(s, o, "PLAIN") { } + + void ProcessMessage(Session *sess, const SASL::Message &m) override + { + if (m.type == "S") + { + GetService()->SendMessage(sess, "C", "+"); + } + else if (m.type == "C") + { + Anope::string decoded; + Anope::B64Decode(m.data, decoded); + + size_t p = decoded.find('\0'); + if (p == Anope::string::npos) + { + GetService()->Fail(sess); + delete sess; + return; + } + decoded = decoded.substr(p + 1); + + p = decoded.find('\0'); + if (p == Anope::string::npos) + { + GetService()->Fail(sess); + delete sess; + return; + } + + Anope::string acc = decoded.substr(0, p), + pass = decoded.substr(p + 1); + + if (!NickServ::service || acc.empty() || pass.empty() || !IRCD->IsNickValid(acc) || pass.find_first_of("\r\n") != Anope::string::npos) + { + GetService()->Fail(sess); + delete sess; + return; + } + + NickServ::IdentifyRequest *req = NickServ::service->CreateIdentifyRequest(new IdentifyRequestListener(GetService(), m.source), this->GetOwner(), acc, pass); + EventManager::Get()->Dispatch(&Event::CheckAuthentication::OnCheckAuthentication, nullptr, req); + req->Dispatch(); + } + } +}; + +class External : public Mechanism +{ + ServiceReference<CertService> certs; + + struct Session : SASL::Session + { + Anope::string cert; + + Session(SASL::Service *s, Mechanism *m, const Anope::string &u) : SASL::Session(s, m, u) { } + }; + + public: + External(SASL::Service *s, Module *o) : Mechanism(s, o, "EXTERNAL") + , certs("certs") + { + if (!IRCD || !IRCD->CanCertFP) + throw ModuleException("No CertFP"); + } + + Session* CreateSession(const Anope::string &uid) override + { + return new Session(this->GetService(), this, uid); + } + + void ProcessMessage(SASL::Session *sess, const SASL::Message &m) override + { + Session *mysess = anope_dynamic_static_cast<Session *>(sess); + + if (m.type == "S") + { + mysess->cert = m.ext; + + GetService()->SendMessage(sess, "C", "+"); + } + else if (m.type == "C") + { + if (!certs || mysess->cert.empty()) + { + GetService()->Fail(sess); + delete sess; + return; + } + + NickServ::Account *nc = certs->FindAccountFromCert(mysess->cert); + if (!nc || nc->HasFieldS("NS_SUSPENDED") || nc->IsUnconfirmed()) + { + Anope::Logger.Category("sasl").Bot("nickserv").Log(_("A user failed to identify using certificate {0} using SASL EXTERNAL"), mysess->cert); + GetService()->Fail(sess); + delete sess; + return; + } + + Anope::Logger.Category("sasl").Bot("nickserv").Log(_("A user identified to account {0} using using SASL EXTERNAL"), nc->GetDisplay()); + GetService()->Succeed(sess, nc); + delete sess; + } + } +}; + +class SASLService : public SASL::Service, public Timer +{ + std::map<Anope::string, SASL::Session *> sessions; + + public: + SASLService(Module *o) : SASL::Service(o), Timer(o, 60, Anope::CurTime, true) { } + + ~SASLService() + { + for (std::map<Anope::string, Session *>::iterator it = sessions.begin(); it != sessions.end(); it++) + delete it->second; + } + + void ProcessMessage(const SASL::Message &m) override + { + if (m.target != "*") + { + Server *s = Server::Find(m.target); + if (s != Me) + { + User *u = User::Find(m.target); + if (!u || u->server != Me) + return; + } + } + + Session* &session = sessions[m.source]; + + if (m.type == "S") + { + ServiceReference<Mechanism> mech(m.data); + if (!mech) + { + Session tmp(this, NULL, m.source); + + this->SendMechs(&tmp); + this->Fail(&tmp); + return; + } + + if (!session) + session = mech->CreateSession(m.source); + } + else if (m.type == "D") + { + delete session; + sessions.erase(m.source); + return; + } + + if (session && session->mech) + session->mech->ProcessMessage(session, m); + } + + Anope::string GetAgent() override + { + Anope::string agent = Config->GetModule(Service::GetOwner())->Get<Anope::string>("agent", "NickServ"); + ServiceBot *bi = Config->GetClient(agent); + if (bi) + agent = bi->GetUID(); + return agent; + } + + Session* GetSession(const Anope::string &uid) override + { + std::map<Anope::string, Session *>::iterator it = sessions.find(uid); + if (it != sessions.end()) + return it->second; + return NULL; + } + + void RemoveSession(Session *sess) override + { + sessions.erase(sess->uid); + } + + void DeleteSessions(Mechanism *mech, bool da) override + { + for (std::map<Anope::string, Session *>::iterator it = sessions.begin(); it != sessions.end();) + { + std::map<Anope::string, Session *>::iterator del = it++; + if (*del->second->mech == mech) + { + if (da) + this->SendMessage(del->second, "D", "A"); + delete del->second; + } + } + } + + void SendMessage(Session *session, const Anope::string &mtype, const Anope::string &data) override + { + SASL::Message msg; + msg.source = this->GetAgent(); + msg.target = session->uid; + msg.type = mtype; + msg.data = data; + + IRCD->Send<messages::SASL>(msg); + } + + void Succeed(Session *session, NickServ::Account *nc) override + { + // If the user is already introduced then we log them in now. + // Otherwise, we send an SVSLOGIN to log them in later. + User *user = User::Find(session->uid); + NickServ::Nick *na = NickServ::FindNick(nc->GetDisplay()); + if (user) + { + user->Identify(na); + } + else + { + HostServ::VHost *vhost = HostServ::FindVHost(nc); + IRCD->Send<messages::SVSLogin>(session->uid, nc->GetDisplay(), vhost ? vhost->GetIdent() : "", vhost ? vhost->GetHost() : ""); + } + this->SendMessage(session, "D", "S"); + } + + void Fail(Session *session) override + { + this->SendMessage(session, "D", "F"); + } + + void SendMechs(Session *session) override + { + std::vector<Mechanism *> mechs = ServiceManager::Get()->FindServices<Mechanism *>(); + + Anope::string buf; + for (unsigned j = 0; j < mechs.size(); ++j) + buf += "," + mechs[j]->GetName(); + + this->SendMessage(session, "M", buf.empty() ? "" : buf.substr(1)); + } + + void Tick(time_t) override + { + for (std::map<Anope::string, Session *>::iterator it = sessions.begin(); it != sessions.end();) + { + Anope::string key = it->first; + Session *s = it->second; + ++it; + + if (!s || !s->mech || s->created + 60 < Anope::CurTime) + { + delete s; + sessions.erase(key); + } + } + } +}; + +void IdentifyRequestListener::OnSuccess(NickServ::IdentifyRequest *req) +{ + NickServ::Nick *na = NickServ::FindNick(req->GetAccount()); + if (!na || na->GetAccount()->HasFieldS("NS_SUSPENDED") || na->GetAccount()->IsUnconfirmed()) + return OnFail(req); + + unsigned int maxlogins = Config->GetModule("nickserv/identify")->Get<unsigned int>("maxlogins"); + if (maxlogins && na->GetAccount()->users.size() >= maxlogins) + return OnFail(req); + + Session *s = service->GetSession(uid); + if (s) + { + Anope::Logger.Category("sasl").Bot("NickServ").Log(_("A user identified to account {0} using SASL"), req->GetAccount()); + service->Succeed(s, na->GetAccount()); + delete s; + } +} + +void IdentifyRequestListener::OnFail(NickServ::IdentifyRequest *req) +{ + Session *s = service->GetSession(uid); + if (s) + { + service->Fail(s); + delete s; + } + + Anope::string accountstatus; + NickServ::Nick *na = NickServ::FindNick(req->GetAccount()); + if (!na) + accountstatus = "nonexistent "; + else if (na->GetAccount()->HasFieldS("NS_SUSPENDED")) + accountstatus = "suspended "; + else if (na->GetAccount()->IsUnconfirmed()) + accountstatus = "unconfirmed "; + + Anope::Logger.Category("sasl").Bot("NickServ").Log(_("A user failed to identify for {0}account {1} using SASL"), + accountstatus, req->GetAccount()); +} + +class ModuleSASL : public Module + , public EventHook<Event::ModuleLoad> + , public EventHook<Event::ModuleUnload> + , public EventHook<Event::PreUplinkSync> +{ + SASLService sasl; + + Plain plain; + External *external = nullptr; + + std::vector<Anope::string> mechs; + + void CheckMechs() + { + std::vector<Anope::string> names; + for (Mechanism *mech : ServiceManager::Get()->FindServices<Mechanism *>()) + names.push_back(mech->GetName()); + + if (mechs == names) + return; + + mechs = names; + + // If we are connected to the network then broadcast the mechlist. + if (Me && Me->IsSynced()) + IRCD->Send<messages::SASLMechanisms>(mechs); + } + + public: + ModuleSASL(const Anope::string &modname, const Anope::string &creator) : Module(modname, creator, VENDOR) + , EventHook<Event::ModuleLoad>(this) + , EventHook<Event::ModuleUnload>(this) + , EventHook<Event::PreUplinkSync>(this) + , sasl(this) + , plain(&sasl, this) + { + try + { + external = new External(&sasl, this); + } + catch (ModuleException &) { } + + CheckMechs(); + } + + ~ModuleSASL() + { + delete external; + } + + void OnModuleLoad(User *, Module *) override + { + CheckMechs(); + } + + void OnModuleUnload(User *, Module *) override + { + CheckMechs(); + } + + void OnPreUplinkSync(Server *) override + { + // We have not yet sent a mechanism list so always do it here. + IRCD->Send<messages::SASLMechanisms>(mechs); + } +}; + +MODULE_INIT(ModuleSASL) |