X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_cgiirc.cpp;h=52c24e50ad89eb815173d9abbc46b72efbbf09d2;hb=3151d60c1ecc9462e4c335282ee6c31672f45111;hp=8d911a5b4c122e40435c40f1549925f14e603048;hpb=c6e40d36b42a7ebf832c3a57d2816a47ee9c9a76;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_cgiirc.cpp b/src/modules/m_cgiirc.cpp index 8d911a5b4..52c24e50a 100644 --- a/src/modules/m_cgiirc.cpp +++ b/src/modules/m_cgiirc.cpp @@ -1,13 +1,18 @@ /* * InspIRCd -- Internet Relay Chat Daemon * + * Copyright (C) 2019 linuxdaemon + * Copyright (C) 2014 md_5 + * Copyright (C) 2014 Googolplexed + * Copyright (C) 2013, 2017-2018, 2020 Sadie Powell + * Copyright (C) 2013 Adam + * Copyright (C) 2012-2013, 2015 Attila Molnar + * Copyright (C) 2012, 2019 Robby * Copyright (C) 2009-2010 Daniel De Graaf - * Copyright (C) 2007-2008 John Brooks - * Copyright (C) 2008 Pippijn van Steenhoven - * Copyright (C) 2006-2008 Craig Edwards - * Copyright (C) 2007 Robin Burchell + * Copyright (C) 2009 Uli Schlachter + * Copyright (C) 2007-2009 Robin Burchell * Copyright (C) 2007 Dennis Friis - * Copyright (C) 2006 Oliver Lupton + * 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 @@ -25,6 +30,7 @@ #include "inspircd.h" #include "modules/ssl.h" +#include "modules/webirc.h" #include "modules/whois.h" enum @@ -33,29 +39,6 @@ enum RPL_WHOISGATEWAY = 350 }; -// We need this method up here so that it can be accessed from anywhere -static void ChangeIP(LocalUser* user, const irc::sockets::sockaddrs& sa) -{ - // Set the users IP address and make sure they are in the right clone pool. - ServerInstance->Users->RemoveCloneCounts(user); - user->SetClientIP(sa); - ServerInstance->Users->AddClone(user); - if (user->quitting) - return; - - // Recheck the connect class. - user->MyClass = NULL; - user->SetClass(); - user->CheckClass(); - if (user->quitting) - return; - - // Check if this user matches any XLines. - user->CheckLines(true); - if (user->quitting) - return; -} - // Encapsulates information about an ident host. class IdentHost { @@ -102,15 +85,15 @@ class WebIRCHost { } - bool Matches(LocalUser* user, const std::string& pass) const + bool Matches(LocalUser* user, const std::string& pass, UserCertificateAPI& sslapi) const { // Did the user send a valid password? if (!password.empty() && !ServerInstance->PassCompare(user, password, pass, passhash)) return false; // Does the user have a valid fingerprint? - const std::string fp = SSLClientCert::GetFingerprint(&user->eh); - if (!fingerprint.empty() && fp != fingerprint) + const std::string fp = sslapi ? sslapi->GetFingerprint(user) : ""; + if (!fingerprint.empty() && !InspIRCd::TimingSafeCompare(fp, fingerprint)) return false; // Does the user's hostname match our hostmask? @@ -141,16 +124,20 @@ class CommandWebIRC : public SplitCommand StringExtItem gateway; StringExtItem realhost; StringExtItem realip; + UserCertificateAPI sslapi; + Events::ModuleEventProvider webircevprov; CommandWebIRC(Module* Creator) : SplitCommand(Creator, "WEBIRC", 4) , gateway("cgiirc_gateway", ExtensionItem::EXT_USER, Creator) , realhost("cgiirc_realhost", ExtensionItem::EXT_USER, Creator) , realip("cgiirc_realip", ExtensionItem::EXT_USER, Creator) + , sslapi(Creator) + , webircevprov(Creator, "event/webirc") { allow_empty_last_param = false; works_before_reg = true; - this->syntax = "password gateway hostname ip"; + this->syntax = " []"; } CmdResult HandleLocal(LocalUser* user, const Params& parameters) CXX11_OVERRIDE @@ -158,21 +145,21 @@ class CommandWebIRC : public SplitCommand if (user->registered == REG_ALL || realhost.get(user)) return CMD_FAILURE; - irc::sockets::sockaddrs ipaddr; - if (!irc::sockets::aptosa(parameters[3], user->client_sa.port(), ipaddr)) - { - user->CommandFloodPenalty += 5000; - WriteLog("Connecting user %s (%s) tried to use WEBIRC but gave an invalid IP address.", - user->uuid.c_str(), user->GetIPString().c_str()); - return CMD_FAILURE; - } - for (std::vector::const_iterator iter = hosts.begin(); iter != hosts.end(); ++iter) { // If we don't match the host then skip to the next host. - if (!iter->Matches(user, parameters[0])) + if (!iter->Matches(user, parameters[0], sslapi)) continue; + irc::sockets::sockaddrs ipaddr; + if (!irc::sockets::aptosa(parameters[3], user->client_sa.port(), ipaddr)) + { + WriteLog("Connecting user %s (%s) tried to use WEBIRC but gave an invalid IP address.", + user->uuid.c_str(), user->GetIPString().c_str()); + ServerInstance->Users->QuitUser(user, "WEBIRC: IP address is invalid: " + parameters[3]); + return CMD_FAILURE; + } + // The user matched a WebIRC block! gateway.set(user, parameters[1]); realhost.set(user, user->GetRealHost()); @@ -181,15 +168,42 @@ class CommandWebIRC : public SplitCommand WriteLog("Connecting user %s is using a WebIRC gateway; changing their IP from %s to %s.", user->uuid.c_str(), user->GetIPString().c_str(), parameters[3].c_str()); + // If we have custom flags then deal with them. + WebIRC::FlagMap flags; + const bool hasflags = (parameters.size() > 4); + if (hasflags) + { + // Parse the flags. + irc::spacesepstream flagstream(parameters[4]); + for (std::string flag; flagstream.GetToken(flag); ) + { + // Does this flag have a value? + const size_t separator = flag.find('='); + if (separator == std::string::npos) + { + flags[flag]; + continue; + } + + // The flag has a value! + const std::string key = flag.substr(0, separator); + const std::string value = flag.substr(separator + 1); + flags[key] = value; + } + } + + // Inform modules about the WebIRC attempt. + FOREACH_MOD_CUSTOM(webircevprov, WebIRC::EventListener, OnWebIRCAuth, (user, (hasflags ? &flags : NULL))); + // Set the IP address sent via WEBIRC. We ignore the hostname and lookup // instead do our own DNS lookups because of unreliable gateways. - ChangeIP(user, ipaddr); + user->SetClientIP(ipaddr); return CMD_SUCCESS; } - user->CommandFloodPenalty += 5000; WriteLog("Connecting user %s (%s) tried to use WEBIRC but didn't match any configured WebIRC hosts.", user->uuid.c_str(), user->GetIPString().c_str()); + ServerInstance->Users->QuitUser(user, "WEBIRC: you don't match any configured WebIRC hosts."); return CMD_FAILURE; } @@ -207,7 +221,10 @@ class CommandWebIRC : public SplitCommand } }; -class ModuleCgiIRC : public Module, public Whois::EventListener +class ModuleCgiIRC + : public Module + , public WebIRC::EventListener + , public Whois::EventListener { private: CommandWebIRC cmd; @@ -251,7 +268,8 @@ class ModuleCgiIRC : public Module, public Whois::EventListener public: ModuleCgiIRC() - : Whois::EventListener(this) + : WebIRC::EventListener(this) + , Whois::EventListener(this) , cmd(this) { } @@ -289,16 +307,23 @@ class ModuleCgiIRC : public Module, public Whois::EventListener // The IP address will be received via the WEBIRC command. const std::string fingerprint = tag->getString("fingerprint"); const std::string password = tag->getString("password"); + const std::string passwordhash = tag->getString("hash", "plaintext", 1); // WebIRC blocks require a password. if (fingerprint.empty() && password.empty()) throw ModuleException("When using either the fingerprint or password field is required, at " + tag->getTagLocation()); - webirchosts.push_back(WebIRCHost(mask, fingerprint, password, tag->getString("hash"))); + if (!password.empty() && stdalgo::string::equalsci(passwordhash, "plaintext")) + { + ServerInstance->Logs->Log(MODNAME, LOG_DEFAULT, " tag at %s contains an plain text password, this is insecure!", + tag->getTagLocation().c_str()); + } + + webirchosts.push_back(WebIRCHost(mask, fingerprint, password, passwordhash)); } else { - throw ModuleException(type + " is an invalid type, at " + tag->getTagLocation()); + throw ModuleException(type + " is an invalid type, at " + tag->getTagLocation()); } } @@ -321,11 +346,22 @@ class ModuleCgiIRC : public Module, public Whois::EventListener // cannot match this connect class. const std::string* gateway = cmd.gateway.get(user); if (!gateway) + { + ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as it requires a connection via a WebIRC gateway", + myclass->GetName().c_str()); return MOD_RES_DENY; + } // If the gateway matches the constraint then // allow the check to continue. Otherwise, reject it. - return InspIRCd::Match(*gateway, webirc) ? MOD_RES_PASSTHRU : MOD_RES_DENY; + if (!InspIRCd::Match(*gateway, webirc)) + { + ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as the WebIRC gateway name (%s) does not match %s", + myclass->GetName().c_str(), gateway->c_str(), webirc.c_str()); + return MOD_RES_DENY; + } + + return MOD_RES_PASSTHRU; } ModResult OnUserRegister(LocalUser* user) CXX11_OVERRIDE @@ -355,12 +391,72 @@ class ModuleCgiIRC : public Module, public Whois::EventListener user->uuid.c_str(), user->GetIPString().c_str(), address.addr().c_str(), user->ident.c_str(), newident.c_str()); user->ChangeIdent(newident); - ChangeIP(user, address); - break; + user->SetClientIP(address); + break; } return MOD_RES_PASSTHRU; } + void OnWebIRCAuth(LocalUser* user, const WebIRC::FlagMap* flags) CXX11_OVERRIDE + { + // We are only interested in connection flags. If none have been + // given then we have nothing to do. + if (!flags) + return; + + WebIRC::FlagMap::const_iterator cport = flags->find("remote-port"); + if (cport != flags->end()) + { + // If we can't parse the port then just give up. + uint16_t port = ConvToNum(cport->second); + if (port) + { + switch (user->client_sa.family()) + { + case AF_INET: + user->client_sa.in4.sin_port = htons(port); + break; + + case AF_INET6: + user->client_sa.in6.sin6_port = htons(port); + break; + + default: + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "BUG: OnWebIRCAuth(%s): socket type %d is unknown!", + user->uuid.c_str(), user->client_sa.family()); + return; + } + } + } + + WebIRC::FlagMap::const_iterator sport = flags->find("local-port"); + if (sport != flags->end()) + { + // If we can't parse the port then just give up. + uint16_t port = ConvToNum(sport->second); + if (port) + { + switch (user->server_sa.family()) + { + case AF_INET: + user->server_sa.in4.sin_port = htons(port); + break; + + case AF_INET6: + user->server_sa.in6.sin6_port = htons(port); + break; + + default: + // If we have reached this point then we have encountered a bug. + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "BUG: OnWebIRCAuth(%s): socket type %d is unknown!", + user->uuid.c_str(), user->server_sa.family()); + return; + } + } + } + } + void OnWhois(Whois::Context& whois) CXX11_OVERRIDE { if (!whois.IsSelfWhois() && !whois.GetSource()->HasPrivPermission("users/auspex")) @@ -381,7 +477,7 @@ class ModuleCgiIRC : public Module, public Whois::EventListener Version GetVersion() CXX11_OVERRIDE { - return Version("Enables forwarding the real IP address of a user from a gateway to the IRC server", VF_VENDOR); + return Version("Adds the ability for IRC gateways to forward the real IP address of users connecting through them.", VF_VENDOR); } };