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
  23 enum
  24 {
  25         // From oftc-hybrid.
  26         RPL_WHOISCERTFP = 276,
  27
  28         // From UnrealIRCd.
  29         RPL_WHOISSECURE = 671
  30 };
  31
  32 class SSLCertExt : public ExtensionItem {
  33  public:
  34         SSLCertExt(Module* parent)
  35                 : ExtensionItem("ssl_cert", ExtensionItem::EXT_USER, parent)
  36         {
  37         }
  38
  39         ssl_cert* get(const Extensible* item) const
  40         {
  41                 return static_cast<ssl_cert*>(get_raw(item));
  42         }
  43         void set(Extensible* item, ssl_cert* value)
  44         {
  45                 value->refcount_inc();
  46                 ssl_cert* old = static_cast<ssl_cert*>(set_raw(item, value));
  47                 if (old && old->refcount_dec())
  48                         delete old;
  49         }
  50
  51         std::string serialize(SerializeFormat format, const Extensible* container, void* item) const CXX11_OVERRIDE
  52         {
  53                 return static_cast<ssl_cert*>(item)->GetMetaLine();
  54         }
  55
  56         void unserialize(SerializeFormat format, Extensible* container, const std::string& value) CXX11_OVERRIDE
  57         {
  58                 ssl_cert* cert = new ssl_cert;
  59                 set(container, cert);
  60
  61                 std::stringstream s(value);
  62                 std::string v;
  63                 getline(s,v,' ');
  64
  65                 cert->invalid = (v.find('v') != std::string::npos);
  66                 cert->trusted = (v.find('T') != std::string::npos);
  67                 cert->revoked = (v.find('R') != std::string::npos);
  68                 cert->unknownsigner = (v.find('s') != std::string::npos);
  69                 if (v.find('E') != std::string::npos)
  70                 {
  71                         getline(s,cert->error,'\n');
  72                 }
  73                 else
  74                 {
  75                         getline(s,cert->fingerprint,' ');
  76                         getline(s,cert->dn,' ');
  77                         getline(s,cert->issuer,'\n');
  78                 }
  79         }
  80
  81         void free(void* item) CXX11_OVERRIDE
  82         {
  83                 ssl_cert* old = static_cast<ssl_cert*>(item);
  84                 if (old && old->refcount_dec())
  85                         delete old;
  86         }
  87 };
  88
  89 /** Handle /SSLINFO
  90  */
  91 class CommandSSLInfo : public Command
  92 {
  93  public:
  94         SSLCertExt CertExt;
  95
  96         CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator)
  97         {
  98                 this->syntax = "<nick>";
  99         }
 100
 101         CmdResult Handle(const std::vector<std::string>& parameters, User* user) CXX11_OVERRIDE
 102         {
 103                 User* target = ServerInstance->FindNickOnly(parameters[0]);
 104
 105                 if ((!target) || (target->registered != REG_ALL))
 106                 {
 107                         user->WriteNumeric(Numerics::NoSuchNick(parameters[0]));
 108                         return CMD_FAILURE;
 109                 }
 110                 bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
 111                 if (operonlyfp && !user->IsOper() && target != user)
 112                 {
 113                         user->WriteNotice("*** You cannot view SSL certificate information for other users");
 114                         return CMD_FAILURE;
 115                 }
 116                 ssl_cert* cert = CertExt.get(target);
 117                 if (!cert)
 118                 {
 119                         user->WriteNotice("*** No SSL certificate for this user");
 120                 }
 121                 else if (cert->GetError().length())
 122                 {
 123                         user->WriteNotice("*** No SSL certificate information for this user (" + cert->GetError() + ").");
 124                 }
 125                 else
 126                 {
 127                         user->WriteNotice("*** Distinguished Name: " + cert->GetDN());
 128                         user->WriteNotice("*** Issuer:             " + cert->GetIssuer());
 129                         user->WriteNotice("*** Key Fingerprint:    " + cert->GetFingerprint());
 130                 }
 131                 return CMD_SUCCESS;
 132         }
 133 };
 134
 135 class UserCertificateAPIImpl : public UserCertificateAPIBase
 136 {
 137         SSLCertExt& ext;
 138
 139  public:
 140         UserCertificateAPIImpl(Module* mod, SSLCertExt& certext)
 141                 : UserCertificateAPIBase(mod), ext(certext)
 142         {
 143         }
 144
 145         ssl_cert* GetCertificate(User* user) CXX11_OVERRIDE
 146         {
 147                 return ext.get(user);
 148         }
 149 };
 150
 151 class ModuleSSLInfo : public Module, public Whois::EventListener
 152 {
 153         CommandSSLInfo cmd;
 154         UserCertificateAPIImpl APIImpl;
 155
 156  public:
 157         ModuleSSLInfo()
 158                 : Whois::EventListener(this)
 159                 , cmd(this)
 160                 , APIImpl(this, cmd.CertExt)
 161         {
 162         }
 163
 164         Version GetVersion() CXX11_OVERRIDE
 165         {
 166                 return Version("SSL Certificate Utilities", VF_VENDOR);
 167         }
 168
 169         void OnWhois(Whois::Context& whois) CXX11_OVERRIDE
 170         {
 171                 ssl_cert* cert = cmd.CertExt.get(whois.GetTarget());
 172                 if (cert)
 173                 {
 174                         whois.SendLine(RPL_WHOISSECURE, "is using a secure connection");
 175                         bool operonlyfp = ServerInstance->Config->ConfValue("sslinfo")->getBool("operonly");
 176                         if ((!operonlyfp || whois.IsSelfWhois() || whois.GetSource()->IsOper()) && !cert->fingerprint.empty())
 177                                 whois.SendLine(RPL_WHOISCERTFP, InspIRCd::Format("has client certificate fingerprint %s", cert->fingerprint.c_str()));
 178                 }
 179         }
 180
 181         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line) CXX11_OVERRIDE
 182         {
 183                 if ((command == "OPER") && (validated))
 184                 {
 185                         ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]);
 186                         if (i != ServerInstance->Config->oper_blocks.end())
 187                         {
 188                                 OperInfo* ifo = i->second;
 189                                 ssl_cert* cert = cmd.CertExt.get(user);
 190
 191                                 if (ifo->oper_block->getBool("sslonly") && !cert)
 192                                 {
 193                                         user->WriteNumeric(491, "This oper login requires an SSL connection.");
 194                                         user->CommandFloodPenalty += 10000;
 195                                         return MOD_RES_DENY;
 196                                 }
 197
 198                                 std::string fingerprint;
 199                                 if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint))
 200                                 {
 201                                         user->WriteNumeric(491, "This oper login requires a matching SSL certificate fingerprint.");
 202                                         user->CommandFloodPenalty += 10000;
 203                                         return MOD_RES_DENY;
 204                                 }
 205                         }
 206                 }
 207
 208                 // Let core handle it for extra stuff
 209                 return MOD_RES_PASSTHRU;
 210         }
 211
 212         void OnUserConnect(LocalUser* user) CXX11_OVERRIDE
 213         {
 214                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 215                 if (cert)
 216                         cmd.CertExt.set(user, cert);
 217         }
 218
 219         void OnPostConnect(User* user) CXX11_OVERRIDE
 220         {
 221                 LocalUser* const localuser = IS_LOCAL(user);
 222                 if (!localuser)
 223                         return;
 224
 225                 const SSLIOHook* const ssliohook = SSLIOHook::IsSSL(&localuser->eh);
 226                 if (!ssliohook)
 227                         return;
 228
 229                 ssl_cert* const cert = ssliohook->GetCertificate();
 230
 231                 {
 232                         std::string text = "*** You are connected to ";
 233                         if (!ssliohook->GetServerName(text))
 234                                 text.append(ServerInstance->Config->ServerName);
 235                         text.append(" using SSL cipher '");
 236                         ssliohook->GetCiphersuite(text);
 237                         text.push_back('\'');
 238                         if ((cert) && (!cert->GetFingerprint().empty()))
 239                                 text.append(" and your SSL certificate fingerprint is ").append(cert->GetFingerprint());
 240                         user->WriteNotice(text);
 241                 }
 242
 243                 if (!cert)
 244                         return;
 245                 // find an auto-oper block for this user
 246                 for (ServerConfig::OperIndex::const_iterator i = ServerInstance->Config->oper_blocks.begin(); i != ServerInstance->Config->oper_blocks.end(); ++i)
 247                 {
 248                         OperInfo* ifo = i->second;
 249                         std::string fp = ifo->oper_block->getString("fingerprint");
 250                         if (fp == cert->fingerprint && ifo->oper_block->getBool("autologin"))
 251                                 user->Oper(ifo);
 252                 }
 253         }
 254
 255         ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass) CXX11_OVERRIDE
 256         {
 257                 ssl_cert* cert = SSLClientCert::GetCertificate(&user->eh);
 258                 bool ok = true;
 259                 if (myclass->config->getString("requiressl") == "trusted")
 260                 {
 261                         ok = (cert && cert->IsCAVerified());
 262                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires a trusted SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 263                 }
 264                 else if (myclass->config->getBool("requiressl"))
 265                 {
 266                         ok = (cert != NULL);
 267                         ServerInstance->Logs->Log("CONNECTCLASS", LOG_DEBUG, "Class requires any SSL cert. Client %s one.", (ok ? "has" : "does not have"));
 268                 }
 269
 270                 if (!ok)
 271                         return MOD_RES_DENY;
 272                 return MOD_RES_PASSTHRU;
 273         }
 274 };
 275
 276 MODULE_INIT(ModuleSSLInfo)