X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_sasl.cpp;h=d37e1c90f8a0f93f3a50ddf891d627352b95c06d;hb=384ef31bc01e4a1a2e59d082c9066002410ba54a;hp=c96b8703400c75ebd3d4bc66ddf3fbff0730692f;hpb=8ff409cb9a393559ebda3990ab2926c9a42d87a1;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_sasl.cpp b/src/modules/m_sasl.cpp index c96b87034..d37e1c90f 100644 --- a/src/modules/m_sasl.cpp +++ b/src/modules/m_sasl.cpp @@ -23,15 +23,134 @@ #include "modules/account.h" #include "modules/sasl.h" #include "modules/ssl.h" +#include "modules/server.h" + +enum +{ + // From IRCv3 sasl-3.1 + RPL_SASLSUCCESS = 903, + ERR_SASLFAIL = 904, + ERR_SASLTOOLONG = 905, + ERR_SASLABORTED = 906, + RPL_SASLMECHS = 908 +}; + +static std::string sasl_target; + +class ServerTracker : public ServerEventListener +{ + bool online; + + void Update(const Server* server, bool linked) + { + if (sasl_target == "*") + return; + + if (InspIRCd::Match(server->GetName(), sasl_target)) + { + ServerInstance->Logs->Log(MODNAME, LOG_VERBOSE, "SASL target server \"%s\" %s", sasl_target.c_str(), (linked ? "came online" : "went offline")); + online = linked; + } + } + + void OnServerLink(const Server* server) CXX11_OVERRIDE + { + Update(server, true); + } + + void OnServerSplit(const Server* server) CXX11_OVERRIDE + { + Update(server, false); + } + + public: + ServerTracker(Module* mod) + : ServerEventListener(mod) + { + Reset(); + } + + void Reset() + { + if (sasl_target == "*") + { + online = true; + return; + } + + online = false; + + ProtocolInterface::ServerList servers; + ServerInstance->PI->GetServerList(servers); + for (ProtocolInterface::ServerList::const_iterator i = servers.begin(); i != servers.end(); ++i) + { + const ProtocolInterface::ServerInfo& server = *i; + if (InspIRCd::Match(server.servername, sasl_target)) + { + online = true; + break; + } + } + } + + bool IsOnline() const { return online; } +}; + +class SASLCap : public Cap::Capability +{ + std::string mechlist; + const ServerTracker& servertracker; + + bool OnRequest(LocalUser* user, bool adding) CXX11_OVERRIDE + { + // Requesting this cap is allowed anytime + if (adding) + return true; + + // But removing it can only be done when unregistered + return (user->registered != REG_ALL); + } + + bool OnList(LocalUser* user) CXX11_OVERRIDE + { + return servertracker.IsOnline(); + } + + const std::string* GetValue(LocalUser* user) const CXX11_OVERRIDE + { + return &mechlist; + } + + public: + SASLCap(Module* mod, const ServerTracker& tracker) + : Cap::Capability(mod, "sasl") + , servertracker(tracker) + { + } + + void SetMechlist(const std::string& newmechlist) + { + if (mechlist == newmechlist) + return; + + mechlist = newmechlist; + NotifyValueChange(); + } +}; enum SaslState { SASL_INIT, SASL_COMM, SASL_DONE }; enum SaslResult { SASL_OK, SASL_FAIL, SASL_ABORT }; -static std::string sasl_target = "*"; static Events::ModuleEventProvider* saslevprov; -static void SendSASL(const parameterlist& params) +static void SendSASL(LocalUser* user, const std::string& agent, char mode, const std::vector& parameters) { + CommandBase::Params params(parameters.size() + 3); + params.push_back(user->uuid); + params.push_back(agent); + params.push_back(ConvToStr(mode)); + params.insert(params.end(), parameters.begin(), parameters.end()); + if (!ServerInstance->PI->SendEncapsulatedData(sasl_target, "SASL", params)) { FOREACH_MOD_CUSTOM(*saslevprov, SASLEventListener, OnSASLAuth, (params)); @@ -45,31 +164,35 @@ class SaslAuthenticator { private: std::string agent; - User *user; + LocalUser* user; SaslState state; SaslResult result; bool state_announced; + void SendHostIP() + { + std::vector params; + params.push_back(user->GetRealHost()); + params.push_back(user->GetIPString()); + params.push_back(SSLIOHook::IsSSL(&user->eh) ? "S" : "P"); + + SendSASL(user, "*", 'H', params); + } + public: - SaslAuthenticator(User* user_, const std::string& method) + SaslAuthenticator(LocalUser* user_, const std::string& method) : user(user_), state(SASL_INIT), state_announced(false) { - parameterlist params; - params.push_back(user->uuid); - params.push_back("*"); - params.push_back("S"); - params.push_back(method); + SendHostIP(); - LocalUser* localuser = IS_LOCAL(user); - if (method == "EXTERNAL" && localuser) - { - std::string fp = SSLClientCert::GetFingerprint(&localuser->eh); + std::vector params; + params.push_back(method); - if (fp.size()) - params.push_back(fp); - } + const std::string fp = SSLClientCert::GetFingerprint(&user->eh); + if (fp.size()) + params.push_back(fp); - SendSASL(params); + SendSASL(user, "*", 'S', params); } SaslResult GetSaslResult(const std::string &result_) @@ -84,7 +207,7 @@ class SaslAuthenticator } /* checks for and deals with a state change. */ - SaslState ProcessInboundMessage(const std::vector &msg) + SaslState ProcessInboundMessage(const CommandBase::Params& msg) { switch (this->state) { @@ -96,6 +219,9 @@ class SaslAuthenticator if (msg[0] != this->agent) return this->state; + if (msg.size() < 4) + return this->state; + if (msg[2] == "C") this->user->Write("AUTHENTICATE %s", msg[3].c_str()); else if (msg[2] == "D") @@ -104,7 +230,7 @@ class SaslAuthenticator this->result = this->GetSaslResult(msg[3]); } else if (msg[2] == "M") - this->user->WriteNumeric(908, "%s %s :are available SASL mechanisms", this->user->nick.c_str(), msg[3].c_str()); + this->user->WriteNumeric(RPL_SASLMECHS, msg[3], "are available SASL mechanisms"); else ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "Services sent an unknown SASL message \"%s\" \"%s\"", msg[2].c_str(), msg[3].c_str()); @@ -119,29 +245,17 @@ class SaslAuthenticator return this->state; } - void Abort(void) - { - this->state = SASL_DONE; - this->result = SASL_ABORT; - } - bool SendClientMessage(const std::vector& parameters) { if (this->state != SASL_COMM) return true; - parameterlist params; - params.push_back(this->user->uuid); - params.push_back(this->agent); - params.push_back("C"); - - params.insert(params.end(), parameters.begin(), parameters.end()); + SendSASL(this->user, this->agent, 'C', parameters); - SendSASL(params); - - if (parameters[0][0] == '*') + if (parameters[0].c_str()[0] == '*') { - this->Abort(); + this->state = SASL_DONE; + this->result = SASL_ABORT; return false; } @@ -156,13 +270,13 @@ class SaslAuthenticator switch (this->result) { case SASL_OK: - this->user->WriteNumeric(903, ":SASL authentication successful"); + this->user->WriteNumeric(RPL_SASLSUCCESS, "SASL authentication successful"); break; case SASL_ABORT: - this->user->WriteNumeric(906, ":SASL authentication aborted"); + this->user->WriteNumeric(ERR_SASLABORTED, "SASL authentication aborted"); break; case SASL_FAIL: - this->user->WriteNumeric(904, ":SASL authentication failed"); + this->user->WriteNumeric(ERR_SASLFAIL, "SASL authentication failed"); break; default: break; @@ -172,25 +286,39 @@ class SaslAuthenticator } }; -class CommandAuthenticate : public Command +class CommandAuthenticate : public SplitCommand { + private: + // The maximum length of an AUTHENTICATE request. + static const size_t MAX_AUTHENTICATE_SIZE = 400; + public: SimpleExtItem& authExt; - GenericCap& cap; - CommandAuthenticate(Module* Creator, SimpleExtItem& ext, GenericCap& Cap) - : Command(Creator, "AUTHENTICATE", 1), authExt(ext), cap(Cap) + Cap::Capability& cap; + CommandAuthenticate(Module* Creator, SimpleExtItem& ext, Cap::Capability& Cap) + : SplitCommand(Creator, "AUTHENTICATE", 1) + , authExt(ext) + , cap(Cap) { works_before_reg = true; + allow_empty_last_param = false; } - CmdResult Handle (const std::vector& parameters, User *user) + CmdResult HandleLocal(LocalUser* user, const Params& parameters) CXX11_OVERRIDE { - /* Only allow AUTHENTICATE on unregistered clients */ - if (user->registered != REG_ALL) { - if (!cap.ext.get(user)) + if (!cap.get(user)) + return CMD_FAILURE; + + if (parameters[0].find(' ') != std::string::npos || parameters[0][0] == ':') return CMD_FAILURE; + if (parameters[0].length() > MAX_AUTHENTICATE_SIZE) + { + user->WriteNumeric(ERR_SASLTOOLONG, "SASL message too long"); + return CMD_FAILURE; + } + SaslAuthenticator *sasl = authExt.get(user); if (!sasl) authExt.set(user, new SaslAuthenticator(user, parameters[0])); @@ -213,10 +341,10 @@ class CommandSASL : public Command this->flags_needed = FLAG_SERVERONLY; // should not be called by users } - CmdResult Handle(const std::vector& parameters, User *user) + CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE { - User* target = ServerInstance->FindNick(parameters[1]); - if ((!target) || (IS_SERVER(target))) + User* target = ServerInstance->FindUUID(parameters[1]); + if (!target) { ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "User not found in sasl ENCAP event: %s", parameters[1].c_str()); return CMD_FAILURE; @@ -235,7 +363,7 @@ class CommandSASL : public Command return CMD_SUCCESS; } - RouteDescriptor GetRouting(User* user, const std::vector& parameters) + RouteDescriptor GetRouting(User* user, const Params& parameters) CXX11_OVERRIDE { return ROUTE_BROADCAST; } @@ -244,7 +372,8 @@ class CommandSASL : public Command class ModuleSASL : public Module { SimpleExtItem authExt; - GenericCap cap; + ServerTracker servertracker; + SASLCap cap; CommandAuthenticate auth; CommandSASL sasl; Events::ModuleEventProvider sasleventprov; @@ -252,7 +381,8 @@ class ModuleSASL : public Module public: ModuleSASL() : authExt("sasl_auth", ExtensionItem::EXT_USER, this) - , cap(this, "sasl") + , servertracker(this) + , cap(this, servertracker) , auth(this, authExt, cap) , sasl(this, authExt) , sasleventprov(this, "event/sasl") @@ -263,29 +393,28 @@ class ModuleSASL : public Module void init() CXX11_OVERRIDE { if (!ServerInstance->Modules->Find("m_services_account.so") || !ServerInstance->Modules->Find("m_cap.so")) - ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: m_services_account.so and m_cap.so are not loaded! m_sasl.so will NOT function correctly until these two modules are loaded!"); + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, "WARNING: m_services_account and m_cap are not loaded! m_sasl will NOT function correctly until these two modules are loaded!"); } void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE { - sasl_target = ServerInstance->Config->ConfValue("sasl")->getString("target", "*"); + std::string target = ServerInstance->Config->ConfValue("sasl")->getString("target"); + if (target.empty()) + throw ModuleException(" must be set to the name of your services server!"); + + sasl_target = target; + servertracker.Reset(); } - ModResult OnUserRegister(LocalUser *user) CXX11_OVERRIDE + void OnDecodeMetaData(Extensible* target, const std::string& extname, const std::string& extdata) CXX11_OVERRIDE { - SaslAuthenticator *sasl_ = authExt.get(user); - if (sasl_) - { - sasl_->Abort(); - authExt.unset(user); - } - - return MOD_RES_PASSTHRU; + if ((target == NULL) && (extname == "saslmechlist")) + cap.SetMechlist(extdata); } Version GetVersion() CXX11_OVERRIDE { - return Version("Provides support for IRC Authentication Layer (aka: atheme SASL) via AUTHENTICATE.",VF_VENDOR); + return Version("Provides support for IRC Authentication Layer (aka: SASL) via AUTHENTICATE.", VF_VENDOR); } };