src/modules/m_sslinfo.cpp

   1 /*
   2  * InspIRCd -- Internet Relay Chat Daemon
   3  *
   4  *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
   5  *
   6  * This file is part of InspIRCd.  InspIRCd is free software: you can
   7  * redistribute it and/or modify it under the terms of the GNU General Public
   8  * License as published by the Free Software Foundation, version 2.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  12  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
  13  * details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19
  20 #include "inspircd.h"
  21 #include "modules/ssl.h"
  22 #include "modules/whois.h"
  23
  24 enum
  25 {
  26         // From oftc-hybrid.
  27         RPL_WHOISCERTFP = 276,
  28
  29         // From UnrealIRCd.
  30         RPL_WHOISSECURE = 671
  31 };
  32
  33 class SSLCertExt : public ExtensionItem {
  34  public:
  35         SSLCertExt(Module* parent)
  36                 : ExtensionItem("ssl_cert", ExtensionItem::EXT_USER, parent)
  37         {
  38         }
  39
  40         ssl_cert* get(const Extensible* item) const
  41         {
  42                 return static_cast<ssl_cert*>(get_raw(item));
  43         }
  44         void set(Extensible* item, ssl_cert* value)
  45         {
  46                 value->refcount_inc();
  47                 ssl_cert* old = static_cast<ssl_cert*>(set_raw(item, value));
  48                 if (old && old->refcount_dec())
  49                         delete old;
  50         }
  51
  52         std::string serialize(SerializeFormat format, const Extensible* container, void* item) const CXX11_OVERRIDE
  53         {
  54                 return static_cast<ssl_cert*>(item)->GetMetaLine();
  55         }
  56
  57         void unserialize(SerializeFormat format, Extensible* container, const std::string& value) CXX11_OVERRIDE
  58         {
  59                 ssl_cert* cert = new ssl_cert;
  60                 set(container, cert);
  61
  62                 std::stringstream s(value);
  63                 std::string v;
  64                 getline(s,v,' ');
  65
  66                 cert->invalid = (v.find('v') != std::string::npos);
  67                 cert->trusted = (v.find('T') != std::string::npos);
  68                 cert->revoked = (v.find('R') != std::string::npos);
  69                 cert->unknownsigner = (v.find('s') != std::string::npos);
  70                 if (v.find('E') != std::string::npos)
  71                 {
  72                         getline(s,cert->error,'\n');
  73                 }
  74                 else
  75                 {
  76                         getline(s,cert->fingerprint,' ');
  77                         getline(s,cert->dn,' ');
  78                         getline(s,cert->issuer,'\n');
  79                 }
  80         }
  81
  82         void free(Extensible* container, void* item) CXX11_OVERRIDE
  83         {
  84                 ssl_cert* old = static_cast<ssl_cert*>(item);
  85                 if (old && old->refcount_dec())
  86                         delete old;
  87         }
  88 };
  89
  90 /** Handle /SSLINFO
  91  */
  92 class CommandSSLInfo : public Command
  93 {
  94  public:
  95         SSLCertExt CertExt;
  96
  97         CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator)
  98         {
  99                 this->syntax = "<nick>";
 100         }
 101
 102         CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE
 103         {
 104                 User* target = ServerInstance->FindNickOnly(parameters[0]);
 105
 106                 if ((!target) || (target->registered != REG_ALL))
 107                 {
 108                         user->WriteNumeric(Numerics::NoSuchNick(parameters[0]));
 109                         return CMD_FAILURE;
 110                 }
 111                 bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
 112                 if (operonlyfp && !user->IsOper() && target != user)
 113                 {
 114                         user->WriteNotice("*** You cannot view SSL certificate information for other users");
 115                         return CMD_FAILURE;
 116                 }
 117                 ssl_cert* cert = CertExt.get(target);
 118                 if (!cert)
 119                 {
 120                         user->WriteNotice("*** No SSL certificate for this user");
 121                 }
 122                 else if (cert->GetError().length())
 123                 {
 124                         user->WriteNotice("*** No SSL certificate information for this user (" + cert->GetError() + ").");
 125                 }
 126                 else
 127                 {
 128                         user->WriteNotice("*** Distinguished Name: " + cert->GetDN());
 129                         user->WriteNotice("*** Issuer:             " + cert->GetIssuer());
 130                         user->WriteNotice("*** Key Fingerprint:    " + cert->GetFingerprint());
 131                 }
 132                 return CMD_SUCCESS;
 133         }
 134 };
 135
 136 class UserCertificateAPIImpl : public UserCertificateAPIBase
 137 {
 138         SSLCertExt& ext;
 139
 140  public:
 141         UserCertificateAPIImpl(Module* mod, SSLCertExt& certext)
 142                 : UserCertificateAPIBase(mod), ext(certext)
 143         {
 144         }
 145
 146         ssl_cert* GetCertificate(User* user) CXX11_OVERRIDE
 147         {
 148                 return ext.get(user);
 149         }
 150
 151         void SetCertificate(User* user, ssl_cert* cert) CXX11_OVERRIDE
 152         {
 153                 ext.set(user, cert);
 154         }
 155 };
 156
 157 class ModuleSSLInfo : public Module, public Whois::EventListener
 158 {
 159         CommandSSLInfo cmd;
 160         UserCertificateAPIImpl APIImpl;
 161
 162  public:
 163         ModuleSSLInfo()
 164                 : Whois::EventListener(this)
 165                 , cmd(this)
 166                 , APIImpl(this, cmd.CertExt)
 167         {
 168         }
 169
 170         Version GetVersion() CXX11_OVERRIDE
 171         {
 172                 return Version("SSL Certificate Utilities", VF_VENDOR);
 173         }
 174
 175         void OnWhois(Whois::Context& whois) CXX11_OVERRIDE
 176         {
 177                 ssl_cert* cert = cmd.CertExt.get(whois.GetTarget());
 178                 if (cert)
 179                 {
 180                         whois.SendLine(RPL_WHOISSECURE, "is using a secure connection");
 181                         bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
 182                         if ((!operonlyfp || whois.IsSelfWhois() || whois.GetSource()->IsOper()) && !cert->fingerprint.empty())
 183                                 whois.SendLine(RPL_WHOISCERTFP, InspIRCd::Format("has client certificate fingerprint %s", cert->fingerprint.c_str()));
 184                 }
 185         }
 186
 187         ModResult OnPreCommand(std::string& command, CommandBase::Params& parameters, LocalUser* user, bool validated) CXX11_OVERRIDE
 188         {
 189                 if ((command == "OPER") && (validated))
 190                 {
 191                         ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]);
 192                         if (i != ServerInstance->Config->oper_blocks.end())
 193                         {
 194                                 OperInfo* ifo = i->second;
 195                                 ssl_cert* cert = cmd.CertExt.get(user);
 196
 197                                 if (ifo->oper_block->getBool("sslonly") && !cert)
 198                                 {
 199                                         user->WriteNumeric(ERR_NOOPERHOST, "This oper login requires an SSL connection.");
 200                                         user->CommandFloodPenalty += 10000;
 201                                         return MOD_RES_DENY;
 202                                 }
 203
 204                                 std::string fingerprint;
 205                                 if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint))
 206                                 {
 207                                         user->WriteNumeric(ERR_NOOPERHOST, "This oper login requires a matching SSL certificate fingerprint.");
 208                                         user->CommandFloodPenalty += 10000;
 209                                         return MOD_RES_DENY;
 210                                 }
 211                         }
 212                 }
 213
 214                 // Let core handle it for extra stuff
 215                 return MOD_RES_PASSTHRU;
 216         }
 217
 218         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 219         {
 220                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 221                 if (cert)
 222                         cmd.CertExt.set(user, cert);
 223         }
 224
 225         void OnPostConnect(User* user) CXX11_OVERRIDE
 226         {
 227                 LocalUser* const localuser = IS_LOCAL(user);
 228                 if (!localuser)
 229                         return;
 230
 231                 const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(&localuser->eh);
 232                 if (!ssliohook)
 233                         return;
 234
 235                 ssl_cert* const cert = ssliohook->GetCertificate();
 236
 237                 {
 238                         std::string text = "*** You are connected to ";
 239                         if (!ssliohook->GetServerName(text))
 240                                 text.append(ServerInstance->Config->ServerName);
 241                         text.append(" using SSL cipher '");
 242                         ssliohook->GetCiphersuite(text);
 243                         text.push_back('\'');
 244                         if ((cert) && (!cert->GetFingerprint().empty()))
 245                                 text.append(" and your SSL certificate fingerprint is ").append(cert->GetFingerprint());
 246                         user->WriteNotice(text);
 247                 }
 248
 249                 if (!cert)
 250                         return;
 251                 // find an auto-oper block for this user
 252                 for (ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); ++i)
 253                 {
 254                         OperInfo* ifo = i->second;
 255                         std::string fp = ifo->oper_block->getString("fingerprint");
 256                         if (fp == cert->fingerprint && ifo->oper_block->getBool("autologin"))
 257                                 user->Oper(ifo);
 258                 }
 259         }
 260
 261         ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE
 262         {
 263                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 264                 bool ok = true;
 265                 if (myclass->config->getString("requiressl") == "trusted")
 266                 {
 267                         ok = (cert && cert->IsCAVerified());
 268                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires a trusted SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 269                 }
 270                 else if (myclass->config->getBool("requiressl"))
 271                 {
 272                         ok = (cert != NULL);
 273                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires any SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 274                 }
 275
 276                 if (!ok)
 277                         return MOD_RES_DENY;
 278                 return MOD_RES_PASSTHRU;
 279         }
 280 };
 281
 282 MODULE_INIT(ModuleSSLInfo)