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(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(const std::vector<std::string>& parameters, User* user) 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
 152 class ModuleSSLInfo : public Module, public Whois::EventListener
 153 {
 154         CommandSSLInfo cmd;
 155         UserCertificateAPIImpl APIImpl;
 156
 157  public:
 158         ModuleSSLInfo()
 159                 : Whois::EventListener(this)
 160                 , cmd(this)
 161                 , APIImpl(this, cmd.CertExt)
 162         {
 163         }
 164
 165         Version GetVersion() CXX11_OVERRIDE
 166         {
 167                 return Version("SSL Certificate Utilities", VF_VENDOR);
 168         }
 169
 170         void OnWhois(Whois::Context& whois) CXX11_OVERRIDE
 171         {
 172                 ssl_cert* cert = cmd.CertExt.get(whois.GetTarget());
 173                 if (cert)
 174                 {
 175                         whois.SendLine(RPL_WHOISSECURE, "is using a secure connection");
 176                         bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
 177                         if ((!operonlyfp || whois.IsSelfWhois() || whois.GetSource()->IsOper()) && !cert->fingerprint.empty())
 178                                 whois.SendLine(RPL_WHOISCERTFP, InspIRCd::Format("has client certificate fingerprint %s", cert->fingerprint.c_str()));
 179                 }
 180         }
 181
 182         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line) CXX11_OVERRIDE
 183         {
 184                 if ((command == "OPER") && (validated))
 185                 {
 186                         ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]);
 187                         if (i != ServerInstance->Config->oper_blocks.end())
 188                         {
 189                                 OperInfo* ifo = i->second;
 190                                 ssl_cert* cert = cmd.CertExt.get(user);
 191
 192                                 if (ifo->oper_block->getBool("sslonly") && !cert)
 193                                 {
 194                                         user->WriteNumeric(ERR_NOOPERHOST, "This oper login requires an SSL connection.");
 195                                         user->CommandFloodPenalty += 10000;
 196                                         return MOD_RES_DENY;
 197                                 }
 198
 199                                 std::string fingerprint;
 200                                 if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint))
 201                                 {
 202                                         user->WriteNumeric(ERR_NOOPERHOST, "This oper login requires a matching SSL certificate fingerprint.");
 203                                         user->CommandFloodPenalty += 10000;
 204                                         return MOD_RES_DENY;
 205                                 }
 206                         }
 207                 }
 208
 209                 // Let core handle it for extra stuff
 210                 return MOD_RES_PASSTHRU;
 211         }
 212
 213         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 214         {
 215                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 216                 if (cert)
 217                         cmd.CertExt.set(user, cert);
 218         }
 219
 220         void OnPostConnect(User* user) CXX11_OVERRIDE
 221         {
 222                 LocalUser* const localuser = IS_LOCAL(user);
 223                 if (!localuser)
 224                         return;
 225
 226                 const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(&localuser->eh);
 227                 if (!ssliohook)
 228                         return;
 229
 230                 ssl_cert* const cert = ssliohook->GetCertificate();
 231
 232                 {
 233                         std::string text = "*** You are connected to ";
 234                         if (!ssliohook->GetServerName(text))
 235                                 text.append(ServerInstance->Config->ServerName);
 236                         text.append(" using SSL cipher '");
 237                         ssliohook->GetCiphersuite(text);
 238                         text.push_back('\'');
 239                         if ((cert) && (!cert->GetFingerprint().empty()))
 240                                 text.append(" and your SSL certificate fingerprint is ").append(cert->GetFingerprint());
 241                         user->WriteNotice(text);
 242                 }
 243
 244                 if (!cert)
 245                         return;
 246                 // find an auto-oper block for this user
 247                 for (ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); ++i)
 248                 {
 249                         OperInfo* ifo = i->second;
 250                         std::string fp = ifo->oper_block->getString("fingerprint");
 251                         if (fp == cert->fingerprint && ifo->oper_block->getBool("autologin"))
 252                                 user->Oper(ifo);
 253                 }
 254         }
 255
 256         ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE
 257         {
 258                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 259                 bool ok = true;
 260                 if (myclass->config->getString("requiressl") == "trusted")
 261                 {
 262                         ok = (cert && cert->IsCAVerified());
 263                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires a trusted SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 264                 }
 265                 else if (myclass->config->getBool("requiressl"))
 266                 {
 267                         ok = (cert != NULL);
 268                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires any SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 269                 }
 270
 271                 if (!ok)
 272                         return MOD_RES_DENY;
 273                 return MOD_RES_PASSTHRU;
 274         }
 275 };
 276
 277 MODULE_INIT(ModuleSSLInfo)