src/modules/m_sslinfo.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2010 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "ssl.h"
  16
  17 /* $ModDesc: Provides SSL metadata, including /WHOIS information and /SSLINFO command */
  18
  19 class SSLCertExt : public ExtensionItem {
  20  public:
  21         SSLCertExt(Module* parent) : ExtensionItem("ssl_cert", parent) {}
  22         ssl_cert* get(const Extensible* item) const
  23         {
  24                 return static_cast<ssl_cert*>(get_raw(item));
  25         }
  26         void set(Extensible* item, ssl_cert* value)
  27         {
  28                 value->refcount_inc();
  29                 ssl_cert* old = static_cast<ssl_cert*>(set_raw(item, value));
  30                 if (old && old->refcount_dec())
  31                         delete old;
  32         }
  33
  34         std::string serialize(SerializeFormat format, const Extensible* container, void* item) const
  35         {
  36                 return static_cast<ssl_cert*>(item)->GetMetaLine();
  37         }
  38
  39         void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
  40         {
  41                 ssl_cert* cert = new ssl_cert;
  42                 set(container, cert);
  43
  44                 std::stringstream s(value);
  45                 std::string v;
  46                 getline(s,v,' ');
  47
  48                 cert->invalid = (v.find('v') != std::string::npos);
  49                 cert->trusted = (v.find('T') != std::string::npos);
  50                 cert->revoked = (v.find('R') != std::string::npos);
  51                 cert->unknownsigner = (v.find('s') != std::string::npos);
  52                 if (v.find('E') != std::string::npos)
  53                 {
  54                         getline(s,cert->error,'\n');
  55                 }
  56                 else
  57                 {
  58                         getline(s,cert->fingerprint,' ');
  59                         getline(s,cert->dn,' ');
  60                         getline(s,cert->issuer,'\n');
  61                 }
  62         }
  63
  64         void free(void* item)
  65         {
  66                 ssl_cert* old = static_cast<ssl_cert*>(item);
  67                 if (old && old->refcount_dec())
  68                         delete old;
  69         }
  70 };
  71
  72 /** Handle /SSLINFO
  73  */
  74 class CommandSSLInfo : public Command
  75 {
  76  public:
  77         SSLCertExt CertExt;
  78
  79         CommandSSLInfo(Module* Creator) : Command(Creator, "SSLINFO", 1), CertExt(Creator)
  80         {
  81                 this->syntax = "<nick>";
  82         }
  83
  84         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  85         {
  86                 User* target = ServerInstance->FindNick(parameters[0]);
  87
  88                 if (target)
  89                 {
  90                         ssl_cert* cert = CertExt.get(target);
  91                         if (cert)
  92                         {
  93                                 if (cert->GetError().length())
  94                                 {
  95                                         user->WriteServ("NOTICE %s :*** No SSL certificate information for this user (%s).", user->nick.c_str(), cert->GetError().c_str());
  96                                 }
  97                                 else
  98                                 {
  99                                         user->WriteServ("NOTICE %s :*** Distinguised Name: %s", user->nick.c_str(), cert->GetDN().c_str());
 100                                         user->WriteServ("NOTICE %s :*** Issuer:            %s", user->nick.c_str(), cert->GetIssuer().c_str());
 101                                         user->WriteServ("NOTICE %s :*** Key Fingerprint:   %s", user->nick.c_str(), cert->GetFingerprint().c_str());
 102                                 }
 103                                 return CMD_SUCCESS;
 104                         }
 105                         else
 106                         {
 107                                 user->WriteServ("NOTICE %s :*** No SSL certificate information for this user.", user->nick.c_str());
 108                                 return CMD_FAILURE;
 109                         }
 110                 }
 111                 else
 112                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str());
 113
 114                 return CMD_FAILURE;
 115         }
 116 };
 117
 118 class ModuleSSLInfo : public Module
 119 {
 120         CommandSSLInfo cmd;
 121
 122  public:
 123         ModuleSSLInfo()
 124                 : cmd(this)
 125         {
 126                 ServerInstance->AddCommand(&cmd);
 127
 128                 ServerInstance->Extensions.Register(&cmd.CertExt);
 129
 130                 Implementation eventlist[] = { I_OnWhois, I_OnPreCommand, I_OnSetConnectClass };
 131                 ServerInstance->Modules->Attach(eventlist, this, 3);
 132         }
 133
 134         Version GetVersion()
 135         {
 136                 return Version("SSL Certificate Utilities", VF_VENDOR);
 137         }
 138
 139         void OnWhois(User* source, User* dest)
 140         {
 141                 if (cmd.CertExt.get(dest))
 142                 {
 143                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
 144                 }
 145         }
 146
 147         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 148         {
 149                 std::stringstream hl(hostlist);
 150                 std::string xhost;
 151                 while (hl >> xhost)
 152                 {
 153                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 154                         {
 155                                 return true;
 156                         }
 157                 }
 158                 return false;
 159         }
 160
 161         ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, LocalUser *user, bool validated, const std::string &original_line)
 162         {
 163                 irc::string pcmd = command.c_str();
 164
 165                 if ((pcmd == "OPER") && (validated))
 166                 {
 167                         OperIndex::iterator i = ServerInstance->Config->oper_blocks.find(parameters[0]);
 168                         if (i != ServerInstance->Config->oper_blocks.end())
 169                         {
 170                                 OperInfo* ifo = i->second;
 171                                 ssl_cert* cert = cmd.CertExt.get(user);
 172
 173                                 if (ifo->oper_block->getBool("sslonly") && !cert)
 174                                 {
 175                                         user->WriteNumeric(491, "%s :This oper login requires an SSL connection.", user->nick.c_str());
 176                                         user->CommandFloodPenalty += 10000;
 177                                         return MOD_RES_DENY;
 178                                 }
 179
 180                                 std::string fingerprint;
 181                                 if (ifo->oper_block->readString("fingerprint", fingerprint) && (!cert || cert->GetFingerprint() != fingerprint))
 182                                 {
 183                                         user->WriteNumeric(491, "%s :This oper login requires a matching SSL fingerprint.",user->nick.c_str());
 184                                         user->CommandFloodPenalty += 10000;
 185                                         return MOD_RES_DENY;
 186                                 }
 187                         }
 188                 }
 189
 190                 // Let core handle it for extra stuff
 191                 return MOD_RES_PASSTHRU;
 192         }
 193
 194         ModResult OnSetConnectClass(LocalUser* user, ConnectClass* myclass)
 195         {
 196                 SocketCertificateRequest req(&user->eh, this);
 197                 req.Send();
 198                 bool ok = true;
 199                 if (myclass->config->getBool("requiressl"))
 200                 {
 201                         ok = (req.cert != NULL);
 202                 }
 203                 else if (myclass->config->getString("requiressl") == "trusted")
 204                 {
 205                         ok = (req.cert && req.cert->IsCAVerified());
 206                 }
 207
 208                 if (!ok)
 209                         return MOD_RES_DENY;
 210                 return MOD_RES_PASSTHRU;
 211         }
 212
 213         void OnRequest(Request& request)
 214         {
 215                 if (strcmp("GET_USER_CERT", request.id) == 0)
 216                 {
 217                         UserCertificateRequest& req = static_cast<UserCertificateRequest&>(request);
 218                         req.cert = cmd.CertExt.get(req.user);
 219                 }
 220                 else if (strcmp("SET_CERT", request.id) == 0)
 221                 {
 222                         SSLCertSubmission& req = static_cast<SSLCertSubmission&>(request);
 223                         cmd.CertExt.set(req.item, req.cert);
 224                 }
 225         }
 226 };
 227
 228 MODULE_INIT(ModuleSSLInfo)
 229