X-Git-Url: https://git.netwichtig.de/gitweb/?a=blobdiff_plain;f=src%2Fmodules%2Fm_sslinfo.cpp;h=5b22a97b4b21b7d60a3c59a6e4bc5cf9d81d4aab;hb=80e81e3b81b779901fd9d67f8ae030ee30c0bcec;hp=7c8cc12f233468f80981cd6028a81b0b8141258d;hpb=23e8bba13c55d33ce89d505780da36c9589e300a;p=user%2Fhenk%2Fcode%2Finspircd.git diff --git a/src/modules/m_sslinfo.cpp b/src/modules/m_sslinfo.cpp index 7c8cc12f2..5b22a97b4 100644 --- a/src/modules/m_sslinfo.cpp +++ b/src/modules/m_sslinfo.cpp @@ -1,7 +1,15 @@ /* * InspIRCd -- Internet Relay Chat Daemon * + * Copyright (C) 2020 Matt Schatz + * Copyright (C) 2019 linuxdaemon + * Copyright (C) 2013, 2017-2021 Sadie Powell + * Copyright (C) 2012-2016 Attila Molnar + * Copyright (C) 2012 Robby + * Copyright (C) 2010 Adam * Copyright (C) 2009-2010 Daniel De Graaf + * Copyright (C) 2007 Dennis Friis + * Copyright (C) 2006-2007, 2009-2010 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 @@ -19,16 +27,32 @@ #include "inspircd.h" #include "modules/ssl.h" +#include "modules/webirc.h" +#include "modules/whois.h" +#include "modules/who.h" -/* $ModDesc: Provides SSL metadata, including /WHOIS information and /SSLINFO command */ +enum +{ + // From oftc-hybrid. + RPL_WHOISCERTFP = 276, + + // From UnrealIRCd. + RPL_WHOISSECURE = 671 +}; -class SSLCertExt : public ExtensionItem { +class SSLCertExt : public ExtensionItem +{ public: - SSLCertExt(Module* parent) : ExtensionItem("ssl_cert", parent) {} + SSLCertExt(Module* parent) + : ExtensionItem("ssl_cert", ExtensionItem::EXT_USER, parent) + { + } + ssl_cert* get(const Extensible* item) const { return static_cast(get_raw(item)); } + void set(Extensible* item, ssl_cert* value) { value->refcount_inc(); @@ -37,12 +61,17 @@ class SSLCertExt : public ExtensionItem { delete old; } - std::string serialize(SerializeFormat format, const Extensible* container, void* item) const + void unset(Extensible* container) + { + free(container, unset_raw(container)); + } + + std::string ToNetwork(const Extensible* container, void* item) const CXX11_OVERRIDE { return static_cast(item)->GetMetaLine(); } - void unserialize(SerializeFormat format, Extensible* container, const std::string& value) + void FromNetwork(Extensible* container, const std::string& value) CXX11_OVERRIDE { ssl_cert* cert = new ssl_cert; set(container, cert); @@ -67,7 +96,7 @@ class SSLCertExt : public ExtensionItem { } } - void free(void* item) + void free(Extensible* container, void* item) CXX11_OVERRIDE { ssl_cert* old = static_cast(item); if (old && old->refcount_dec()) @@ -75,125 +104,233 @@ class SSLCertExt : public ExtensionItem { } }; -/** Handle /SSLINFO - */ -class CommandSSLInfo : public Command +class UserCertificateAPIImpl : public UserCertificateAPIBase { public: - SSLCertExt CertExt; + LocalIntExt nosslext; + SSLCertExt sslext; - CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator) + UserCertificateAPIImpl(Module* mod) + : UserCertificateAPIBase(mod) + , nosslext("no_ssl_cert", ExtensionItem::EXT_USER, mod) + , sslext(mod) { - this->syntax = ""; } - CmdResult Handle (const std::vector ¶meters, User *user) + ssl_cert* GetCertificate(User* user) CXX11_OVERRIDE { - User* target = ServerInstance->FindNickOnly(parameters[0]); + ssl_cert* cert = sslext.get(user); + if (cert) + return cert; - if ((!target) || (target->registered != REG_ALL)) + LocalUser* luser = IS_LOCAL(user); + if (!luser || nosslext.get(luser)) + return NULL; + + cert = SSLClientCert::GetCertificate(&luser->eh); + if (!cert) + return NULL; + + SetCertificate(user, cert); + return cert; + } + + void SetCertificate(User* user, ssl_cert* cert) CXX11_OVERRIDE + { + ServerInstance->Logs->Log(MODNAME, LOG_DEBUG, "Setting TLS (SSL) client certificate for %s: %s", + user->GetFullHost().c_str(), cert->GetMetaLine().c_str()); + sslext.set(user, cert); + } +}; + +class CommandSSLInfo : public SplitCommand +{ + private: + ChanModeReference sslonlymode; + + void HandleUserInternal(LocalUser* source, User* target, bool verbose) + { + ssl_cert* cert = sslapi.GetCertificate(target); + if (!cert) + { + source->WriteNotice(InspIRCd::Format("*** %s is not connected using TLS (SSL).", target->nick.c_str())); + } + else if (cert->GetError().length()) + { + source->WriteNotice(InspIRCd::Format("*** %s is connected using TLS (SSL) but has not specified a valid client certificate (%s).", + target->nick.c_str(), cert->GetError().c_str())); + } + else if (!verbose) + { + source->WriteNotice(InspIRCd::Format("*** %s is connected using TLS (SSL) with a valid client certificate (%s).", + target->nick.c_str(), cert->GetFingerprint().c_str())); + } + else + { + source->WriteNotice("*** Distinguished Name: " + cert->GetDN()); + source->WriteNotice("*** Issuer: " + cert->GetIssuer()); + source->WriteNotice("*** Key Fingerprint: " + cert->GetFingerprint()); + } + } + + CmdResult HandleUser(LocalUser* source, const std::string& nick) + { + User* target = ServerInstance->FindNickOnly(nick); + if (!target || target->registered != REG_ALL) { - user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str()); + source->WriteNumeric(Numerics::NoSuchNick(nick)); return CMD_FAILURE; } - bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly"); - if (operonlyfp && !user->IsOper() && target != user) + + if (operonlyfp && !source->IsOper() && source != target) { - user->WriteNotice("*** You cannot view SSL certificate information for other users"); + source->WriteNumeric(ERR_NOPRIVILEGES, "You must be a server operator to view TLS (SSL) client certificate information for other users."); return CMD_FAILURE; } - ssl_cert* cert = CertExt.get(target); - if (!cert) + + HandleUserInternal(source, target, true); + return CMD_SUCCESS; + } + + CmdResult HandleChannel(LocalUser* source, const std::string& channel) + { + Channel* chan = ServerInstance->FindChan(channel); + if (!chan) { - user->WriteNotice("*** No SSL certificate for this user"); + source->WriteNumeric(Numerics::NoSuchChannel(channel)); + return CMD_FAILURE; } - else if (cert->GetError().length()) + + if (operonlyfp && !source->IsOper()) { - user->WriteNotice("*** No SSL certificate information for this user (" + cert->GetError() + ")."); + source->WriteNumeric(ERR_NOPRIVILEGES, "You must be a server operator to view TLS (SSL) client certificate information for channels."); + return CMD_FAILURE; } - else + + if (!source->IsOper() && chan->GetPrefixValue(source) < OP_VALUE) + { + source->WriteNumeric(ERR_CHANOPRIVSNEEDED, chan->name, "You must be a channel operator."); + return CMD_FAILURE; + } + + if (sslonlymode) { - user->WriteNotice("*** Distinguished Name: " + cert->GetDN()); - user->WriteNotice("*** Issuer: " + cert->GetIssuer()); - user->WriteNotice("*** Key Fingerprint: " + cert->GetFingerprint()); + source->WriteNotice(InspIRCd::Format("*** %s %s have channel mode +%c (%s) set.", + chan->name.c_str(), chan->IsModeSet(sslonlymode) ? "does" : "does not", + sslonlymode->GetModeChar(), sslonlymode->name.c_str())); } + + const Channel::MemberMap& userlist = chan->GetUsers(); + for (Channel::MemberMap::const_iterator i = userlist.begin(); i != userlist.end(); ++i) + HandleUserInternal(source, i->first, false); + return CMD_SUCCESS; } + + public: + UserCertificateAPIImpl sslapi; + bool operonlyfp; + + CommandSSLInfo(Module* Creator) + : SplitCommand(Creator, "SSLINFO", 1) + , sslonlymode(Creator, "sslonly") + , sslapi(Creator) + { + allow_empty_last_param = false; + syntax = ""; + } + + CmdResult HandleLocal(LocalUser* user, const Params& parameters) CXX11_OVERRIDE + { + if (ServerInstance->IsChannel(parameters[0])) + return HandleChannel(user, parameters[0]); + else + return HandleUser(user, parameters[0]); + } }; -class ModuleSSLInfo : public Module +class ModuleSSLInfo + : public Module + , public WebIRC::EventListener + , public Whois::EventListener + , public Who::EventListener { + private: CommandSSLInfo cmd; - public: - ModuleSSLInfo() : cmd(this) + bool MatchFP(ssl_cert* const cert, const std::string& fp) const { + return irc::spacesepstream(fp).Contains(cert->GetFingerprint()); } - void init() + public: + ModuleSSLInfo() + : WebIRC::EventListener(this) + , Whois::EventListener(this) + , Who::EventListener(this) + , cmd(this) { - ServerInstance->Modules->AddService(cmd); - - ServerInstance->Modules->AddService(cmd.CertExt); + } - Implementation eventlist[] = { I_OnWhois, I_OnPreCommand, I_OnSetConnectClass, I_OnUserConnect, I_OnPostConnect }; - ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation)); + void ReadConfig(ConfigStatus& status) CXX11_OVERRIDE + { + ConfigTag* tag = ServerInstance->Config->ConfValue("sslinfo"); + cmd.operonlyfp = tag->getBool("operonly"); } - Version GetVersion() + Version GetVersion() CXX11_OVERRIDE { - return Version("SSL Certificate Utilities", VF_VENDOR); + return Version("Adds user facing TLS (SSL) information, various TLS (SSL) configuration options, and the /SSLINFO command to look up TLS (SSL) certificate information for other users.", VF_VENDOR); } - void OnWhois(User* source, User* dest) + void OnWhois(Whois::Context& whois) CXX11_OVERRIDE { - ssl_cert* cert = cmd.CertExt.get(dest); + ssl_cert* cert = cmd.sslapi.GetCertificate(whois.GetTarget()); if (cert) { - ServerInstance->SendWhoisLine(source, dest, 671, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str()); - bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly"); - if ((!operonlyfp || source == dest || source->IsOper()) && !cert->fingerprint.empty()) - ServerInstance->SendWhoisLine(source, dest, 276, "%s %s :has client certificate fingerprint %s", - source->nick.c_str(), dest->nick.c_str(), cert->fingerprint.c_str()); + whois.SendLine(RPL_WHOISSECURE, "is using a secure connection"); + if ((!cmd.operonlyfp || whois.IsSelfWhois() || whois.GetSource()->IsOper()) && !cert->fingerprint.empty()) + whois.SendLine(RPL_WHOISCERTFP, InspIRCd::Format("has TLS (SSL) client certificate fingerprint %s", cert->fingerprint.c_str())); } } - bool OneOfMatches(const char* host, const char* ip, const char* hostlist) + ModResult OnWhoLine(const Who::Request& request, LocalUser* source, User* user, Membership* memb, Numeric::Numeric& numeric) CXX11_OVERRIDE { - std::stringstream hl(hostlist); - std::string xhost; - while (hl >> xhost) - { - if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map)) - { - return true; - } - } - return false; + size_t flag_index; + if (!request.GetFieldIndex('f', flag_index)) + return MOD_RES_PASSTHRU; + + ssl_cert* cert = cmd.sslapi.GetCertificate(user); + if (cert) + numeric.GetParams()[flag_index].push_back('s'); + + return MOD_RES_PASSTHRU; } - ModResult OnPreCommand(std::string &command, std::vector ¶meters, LocalUser *user, bool validated, const std::string &original_line) + ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated) CXX11_OVERRIDE { if ((command == "OPER") && (validated)) { - OperIndex::iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]); + ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]); if (i != ServerInstance->Config->oper_blocks.end()) { OperInfo* ifo = i->second; - ssl_cert* cert = cmd.CertExt.get(user); + ssl_cert* cert = cmd.sslapi.GetCertificate(user); if (ifo->oper_block->getBool("sslonly") && !cert) { - user->WriteNumeric(491, "%s :This oper login requires an SSL connection.", user->nick.c_str()); + user->WriteNumeric(ERR_NOOPERHOST, "Invalid oper credentials"); user->CommandFloodPenalty += 10000; + ServerInstance->SNO->WriteGlobalSno('o', "WARNING! Failed oper attempt by %s using login '%s': a secure connection is required.", user->GetFullRealHost().c_str(), parameters[0].c_str()); return MOD_RES_DENY; } std::string fingerprint; - if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint)) + if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || !MatchFP(cert, fingerprint))) { - user->WriteNumeric(491, "%s :This oper login requires a matching SSL fingerprint.",user->nick.c_str()); + user->WriteNumeric(ERR_NOOPERHOST, "Invalid oper credentials"); user->CommandFloodPenalty += 10000; + ServerInstance->SNO->WriteGlobalSno('o', "WARNING! Failed oper attempt by %s using login '%s': their TLS (SSL) client certificate fingerprint does not match.", user->GetFullRealHost().c_str(), parameters[0].c_str()); return MOD_RES_DENY; } } @@ -203,54 +340,97 @@ class ModuleSSLInfo : public Module return MOD_RES_PASSTHRU; } - void OnUserConnect(LocalUser* user) + void OnPostConnect(User* user) CXX11_OVERRIDE { - SocketCertificateRequest req(&user->eh, this); - if (!req.cert) + LocalUser* const localuser = IS_LOCAL(user); + if (!localuser) return; - cmd.CertExt.set(user, req.cert); - } - void OnPostConnect(User* user) - { - ssl_cert *cert = cmd.CertExt.get(user); - if (!cert || cert->fingerprint.empty()) + const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(&localuser->eh); + if (!ssliohook || cmd.sslapi.nosslext.get(localuser)) + return; + + ssl_cert* const cert = ssliohook->GetCertificate(); + + std::string text = "*** You are connected to "; + if (!ssliohook->GetServerName(text)) + text.append(ServerInstance->Config->GetServerName()); + text.append(" using TLS (SSL) cipher '"); + ssliohook->GetCiphersuite(text); + text.push_back('\''); + if (cert && !cert->GetFingerprint().empty()) + text.append(" and your TLS (SSL) client certificate fingerprint is ").append(cert->GetFingerprint()); + user->WriteNotice(text); + + if (!cert) return; - // find an auto-oper block for this user - for(OperIndex::iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); i++) + + // Find an auto-oper block for this user + for (ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); ++i) { OperInfo* ifo = i->second; std::string fp = ifo->oper_block->getString("fingerprint"); - if (fp == cert->fingerprint && ifo->oper_block->getBool("autologin")) + if (MatchFP(cert, fp) && ifo->oper_block->getBool("autologin")) user->Oper(ifo); } } - ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) + ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE { - SocketCertificateRequest req(&user->eh, this); - bool ok = true; - if (myclass->config->getString("requiressl") == "trusted") + ssl_cert* cert = cmd.sslapi.GetCertificate(user); + const char* error = NULL; + const std::string requiressl = myclass->config->getString("requiressl"); + if (stdalgo::string::equalsci(requiressl, "trusted")) { - ok = (req.cert && req.cert->IsCAVerified()); + if (!cert || !cert->IsCAVerified()) + error = "a trusted TLS (SSL) client certificate"; } else if (myclass->config->getBool("requiressl")) { - ok = (req.cert != NULL); + if (!cert) + error = "a TLS (SSL) connection"; } - if (!ok) + if (error) + { + ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "The %s connect class is not suitable as it requires %s", + myclass->GetName().c_str(), error); return MOD_RES_DENY; + } + return MOD_RES_PASSTHRU; } - void OnRequest(Request& request) + void OnWebIRCAuth(LocalUser* user, const WebIRC::FlagMap* flags) CXX11_OVERRIDE { - if (strcmp("GET_USER_CERT", request.id) == 0) + // We are only interested in connection flags. If none have been + // given then we have nothing to do. + if (!flags) + return; + + // We only care about the tls connection flag if the connection + // between the gateway and the server is secure. + if (!cmd.sslapi.GetCertificate(user)) + return; + + WebIRC::FlagMap::const_iterator iter = flags->find("secure"); + if (iter == flags->end()) { - UserCertificateRequest& req = static_cast(request); - req.cert = cmd.CertExt.get(req.user); + // If this is not set then the connection between the client and + // the gateway is not secure. + cmd.sslapi.nosslext.set(user, 1); + cmd.sslapi.sslext.unset(user); + return; } + + // Create a fake ssl_cert for the user. + ssl_cert* cert = new ssl_cert; + cert->error = "WebIRC users can not specify valid certs yet"; + cert->invalid = true; + cert->revoked = true; + cert->trusted = false; + cert->unknownsigner = true; + cmd.sslapi.SetCertificate(user, cert); } };