/* * InspIRCd -- Internet Relay Chat Daemon * * Copyright (C) 2020 Matt Schatz * Copyright (C) 2013, 2017-2020 Sadie Powell * Copyright (C) 2013 Shawn Smith * Copyright (C) 2012-2014 Attila Molnar * Copyright (C) 2012 Robby * Copyright (C) 2009-2010 Daniel De Graaf * Copyright (C) 2009 Uli Schlachter * Copyright (C) 2008 Robin Burchell * Copyright (C) 2007 Dennis Friis * Copyright (C) 2006-2007, 2010 Craig Edwards * * This file is part of InspIRCd. InspIRCd 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 . */ #include "inspircd.h" #include "modules/ctctags.h" #include "modules/ssl.h" enum { // From UnrealIRCd. ERR_SECUREONLYCHAN = 489, ERR_ALLMUSTSSL = 490 }; /** Handle channel mode +z */ class SSLMode : public ModeHandler { private: UserCertificateAPI& API; public: SSLMode(Module* Creator, UserCertificateAPI& api) : ModeHandler(Creator, "sslonly", 'z', PARAM_NONE, MODETYPE_CHANNEL) , API(api) { } ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string& parameter, bool adding) CXX11_OVERRIDE { if (adding) { if (!channel->IsModeSet(this)) { if (IS_LOCAL(source)) { if (!API) { source->WriteNumeric(ERR_ALLMUSTSSL, channel->name, "Unable to determine whether all members of the channel are connected via TLS (SSL)"); return MODEACTION_DENY; } unsigned long nonssl = 0; const Channel::MemberMap& userlist = channel->GetUsers(); for (Channel::MemberMap::const_iterator i = userlist.begin(); i != userlist.end(); ++i) { ssl_cert* cert = API->GetCertificate(i->first); if (!cert && !i->first->server->IsULine()) nonssl++; } if (nonssl) { source->WriteNumeric(ERR_ALLMUSTSSL, channel->name, InspIRCd::Format("All members of the channel must be connected via TLS (SSL) (%lu/%lu are non-TLS (SSL))", nonssl, static_cast(userlist.size()))); return MODEACTION_DENY; } } channel->SetMode(this, true); return MODEACTION_ALLOW; } else { return MODEACTION_DENY; } } else { if (channel->IsModeSet(this)) { channel->SetMode(this, false); return MODEACTION_ALLOW; } return MODEACTION_DENY; } } }; /** Handle user mode +z */ class SSLModeUser : public ModeHandler { private: UserCertificateAPI& API; public: SSLModeUser(Module* Creator, UserCertificateAPI& api) : ModeHandler(Creator, "sslqueries", 'z', PARAM_NONE, MODETYPE_USER) , API(api) { if (!ServerInstance->Config->ConfValue("sslmodes")->getBool("enableumode")) DisableAutoRegister(); } ModeAction OnModeChange(User* user, User* dest, Channel* channel, std::string& parameter, bool adding) CXX11_OVERRIDE { if (adding) { if (!dest->IsModeSet(this)) { if (!API || !API->GetCertificate(user)) return MODEACTION_DENY; dest->SetMode(this, true); return MODEACTION_ALLOW; } } else { if (dest->IsModeSet(this)) { dest->SetMode(this, false); return MODEACTION_ALLOW; } } return MODEACTION_DENY; } }; class ModuleSSLModes : public Module , public CTCTags::EventListener { private: UserCertificateAPI api; SSLMode sslm; SSLModeUser sslquery; public: ModuleSSLModes() : CTCTags::EventListener(this) , api(this) , sslm(this, api) , sslquery(this, api) { } ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE { if(chan && chan->IsModeSet(sslm)) { if (!api) { user->WriteNumeric(ERR_SECUREONLYCHAN, cname, "Cannot join channel; unable to determine if you are a TLS (SSL) user (+z is set)"); return MOD_RES_DENY; } if (!api->GetCertificate(user)) { user->WriteNumeric(ERR_SECUREONLYCHAN, cname, "Cannot join channel; TLS (SSL) users only (+z is set)"); return MOD_RES_DENY; } } return MOD_RES_PASSTHRU; } ModResult HandleMessage(User* user, const MessageTarget& msgtarget) { if (msgtarget.type != MessageTarget::TYPE_USER) return MOD_RES_PASSTHRU; User* target = msgtarget.Get(); /* If one or more of the parties involved is a ulined service, we won't stop it. */ if (user->server->IsULine() || target->server->IsULine()) return MOD_RES_PASSTHRU; /* If the target is +z */ if (target->IsModeSet(sslquery)) { if (!api || !api->GetCertificate(user)) { /* The sending user is not on an SSL connection */ user->WriteNumeric(Numerics::CannotSendTo(target, "messages", &sslquery)); return MOD_RES_DENY; } } /* If the user is +z */ else if (user->IsModeSet(sslquery)) { if (!api || !api->GetCertificate(target)) { user->WriteNumeric(Numerics::CannotSendTo(target, "messages", &sslquery, true)); return MOD_RES_DENY; } } return MOD_RES_PASSTHRU; } ModResult OnUserPreMessage(User* user, const MessageTarget& target, MessageDetails& details) CXX11_OVERRIDE { return HandleMessage(user, target); } ModResult OnUserPreTagMessage(User* user, const MessageTarget& target, CTCTags::TagMessageDetails& details) CXX11_OVERRIDE { return HandleMessage(user, target); } ModResult OnCheckBan(User *user, Channel *c, const std::string& mask) CXX11_OVERRIDE { if ((mask.length() > 2) && (mask[0] == 'z') && (mask[1] == ':')) { const std::string fp = api ? api->GetFingerprint(user) : ""; if (!fp.empty() && InspIRCd::Match(fp, mask.substr(2))) return MOD_RES_DENY; } return MOD_RES_PASSTHRU; } void On005Numeric(std::map& tokens) CXX11_OVERRIDE { tokens["EXTBAN"].push_back('z'); } Version GetVersion() CXX11_OVERRIDE { return Version("Adds channel mode z (sslonly) which prevents users who are not connecting using TLS (SSL) from joining the channel and user mode z (sslqueries) to prevent messages from non-TLS (SSL) users.", VF_VENDOR); } }; MODULE_INIT(ModuleSSLModes)