src/modules/m_sslmodes.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
   5  *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
   6  *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
   7  *   Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
   8  *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
   9  *
  10  * This file is part of InspIRCd.  InspIRCd is free software: you can
  11  * redistribute it and/or modify it under the terms of the GNU General Public
  12  * License as published by the Free Software Foundation, version 2.
  13  *
  14  * This program is distributed in the hope that it will be useful, but WITHOUT
  15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  16  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  17  * details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23
  24 #include "inspircd.h"
  25 #include "modules/ssl.h"
  26
  27 /* $ModDesc: Provides channel mode +z to allow for Secure/SSL only channels */
  28
  29 /** Handle channel mode +z
  30  */
  31 class SSLMode : public ModeHandler
  32 {
  33  public:
  34         UserCertificateAPI API;
  35
  36         SSLMode(Module* Creator)
  37                 : ModeHandler(Creator, "sslonly", 'z', PARAM_NONE, MODETYPE_CHANNEL)
  38                 , API(Creator)
  39         {
  40         }
  41
  42         ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
  43         {
  44                 if (adding)
  45                 {
  46                         if (!channel->IsModeSet('z'))
  47                         {
  48                                 if (IS_LOCAL(source))
  49                                 {
  50                                         if (!API)
  51                                                 return MODEACTION_DENY;
  52
  53                                         const UserMembList* userlist = channel->GetUsers();
  54                                         for(UserMembCIter i = userlist->begin(); i != userlist->end(); i++)
  55                                         {
  56                                                 ssl_cert* cert = API->GetCertificate(i->first);
  57                                                 if (!cert && !ServerInstance->ULine(i->first->server))
  58                                                 {
  59                                                         source->WriteNumeric(ERR_ALLMUSTSSL, "%s %s :all members of the channel must be connected via SSL", source->nick.c_str(), channel->name.c_str());
  60                                                         return MODEACTION_DENY;
  61                                                 }
  62                                         }
  63                                 }
  64                                 channel->SetMode('z',true);
  65                                 return MODEACTION_ALLOW;
  66                         }
  67                         else
  68                         {
  69                                 return MODEACTION_DENY;
  70                         }
  71                 }
  72                 else
  73                 {
  74                         if (channel->IsModeSet('z'))
  75                         {
  76                                 channel->SetMode('z',false);
  77                                 return MODEACTION_ALLOW;
  78                         }
  79
  80                         return MODEACTION_DENY;
  81                 }
  82         }
  83 };
  84
  85 class ModuleSSLModes : public Module
  86 {
  87
  88         SSLMode sslm;
  89
  90  public:
  91         ModuleSSLModes()
  92                 : sslm(this)
  93         {
  94         }
  95
  96         void init() CXX11_OVERRIDE
  97         {
  98                 ServerInstance->Modules->AddService(sslm);
  99                 Implementation eventlist[] = { I_OnUserPreJoin, I_OnCheckBan, I_On005Numeric };
 100                 ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
 101         }
 102
 103         ModResult OnUserPreJoin(LocalUser* user, Channel* chan, const std::string& cname, std::string& privs, const std::string& keygiven) CXX11_OVERRIDE
 104         {
 105                 if(chan && chan->IsModeSet('z'))
 106                 {
 107                         if (!sslm.API)
 108                                 return MOD_RES_DENY;
 109
 110                         ssl_cert* cert = sslm.API->GetCertificate(user);
 111                         if (cert)
 112                         {
 113                                 // Let them in
 114                                 return MOD_RES_PASSTHRU;
 115                         }
 116                         else
 117                         {
 118                                 // Deny
 119                                 user->WriteServ( "489 %s %s :Cannot join channel; SSL users only (+z)", user->nick.c_str(), cname.c_str());
 120                                 return MOD_RES_DENY;
 121                         }
 122                 }
 123
 124                 return MOD_RES_PASSTHRU;
 125         }
 126
 127         ModResult OnCheckBan(User *user, Channel *c, const std::string& mask) CXX11_OVERRIDE
 128         {
 129                 if ((mask.length() > 2) && (mask[0] == 'z') && (mask[1] == ':'))
 130                 {
 131                         if (!sslm.API)
 132                                 return MOD_RES_DENY;
 133
 134                         ssl_cert* cert = sslm.API->GetCertificate(user);
 135                         if (cert && InspIRCd::Match(cert->GetFingerprint(), mask.substr(2)))
 136                                 return MOD_RES_DENY;
 137                 }
 138                 return MOD_RES_PASSTHRU;
 139         }
 140
 141         void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
 142         {
 143                 tokens["EXTBAN"].push_back('z');
 144         }
 145
 146         Version GetVersion() CXX11_OVERRIDE
 147         {
 148                 return Version("Provides channel mode +z to allow for Secure/SSL only channels", VF_VENDOR);
 149         }
 150 };
 151
 152 MODULE_INIT(ModuleSSLModes)