src/modules/m_sslinfo.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 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 "transport.h"
  16
  17 /* $ModDesc: Provides SSL metadata, including /WHOIS information and /SSLINFO command */
  18
  19 /** Handle /SSLINFO
  20  */
  21 class CommandSSLInfo : public Command
  22 {
  23  public:
  24         CommandSSLInfo(InspIRCd* Instance, Module* Creator) : Command(Instance, Creator, "SSLINFO", 0, 1)
  25         {
  26                 this->syntax = "<nick>";
  27         }
  28
  29         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  30         {
  31                 User* target = ServerInstance->FindNick(parameters[0]);
  32                 ssl_cert* cert;
  33
  34                 if (target)
  35                 {
  36                         if (target->GetExt("ssl_cert", cert))
  37                         {
  38                                 if (cert->GetError().length())
  39                                 {
  40                                         user->WriteServ("NOTICE %s :*** No SSL certificate information for this user (%s).", user->nick.c_str(), cert->GetError().c_str());
  41                                 }
  42                                 else
  43                                 {
  44                                         user->WriteServ("NOTICE %s :*** Distinguised Name: %s", user->nick.c_str(), cert->GetDN().c_str());
  45                                         user->WriteServ("NOTICE %s :*** Issuer:            %s", user->nick.c_str(), cert->GetIssuer().c_str());
  46                                         user->WriteServ("NOTICE %s :*** Key Fingerprint:   %s", user->nick.c_str(), cert->GetFingerprint().c_str());
  47                                 }
  48                                 return CMD_SUCCESS;
  49                         }
  50                         else
  51                         {
  52                                 user->WriteServ("NOTICE %s :*** No SSL certificate information for this user.", user->nick.c_str());
  53                                 return CMD_FAILURE;
  54                         }
  55                 }
  56                 else
  57                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str());
  58
  59                 return CMD_FAILURE;
  60         }
  61 };
  62
  63 class ModuleSSLInfo : public Module
  64 {
  65         CommandSSLInfo cmd;
  66  public:
  67         ModuleSSLInfo(InspIRCd* Me)
  68                 : Module(Me), cmd(Me, this)
  69         {
  70                 ServerInstance->AddCommand(&cmd);
  71
  72                 Implementation eventlist[] = { I_OnSyncUser, I_OnDecodeMetaData, I_OnWhois, I_OnPreCommand };
  73                 ServerInstance->Modules->Attach(eventlist, this, 4);
  74         }
  75
  76
  77         virtual ~ModuleSSLInfo()
  78         {
  79         }
  80
  81         virtual Version GetVersion()
  82         {
  83                 return Version("$Id$", VF_VENDOR, API_VERSION);
  84         }
  85
  86         virtual void OnCleanup(int target_type, void* item)
  87         {
  88                 if (target_type != TYPE_USER)
  89                         return;
  90                 User* user = static_cast<User*>(item);
  91                 user->Shrink("ssl_cert");
  92         }
  93
  94         virtual void OnWhois(User* source, User* dest)
  95         {
  96                 if(dest->GetExt("ssl"))
  97                 {
  98                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
  99                 }
 100         }
 101
 102         virtual void OnSyncUser(User* user, Module* proto, void* opaque)
 103         {
 104                 if (user->GetExt("ssl"))
 105                         proto->ProtoSendMetaData(opaque, user, "ssl", "ON");
 106
 107                 ssl_cert* cert;
 108                 if (user->GetExt("ssl_cert", cert))
 109                         proto->ProtoSendMetaData(opaque, user, "ssl_cert", cert->GetMetaLine().c_str());
 110         }
 111
 112         virtual void OnDecodeMetaData(Extensible* target, const std::string &extname, const std::string &extdata)
 113         {
 114                 User* dest = dynamic_cast<User*>(target);
 115                 // check if its our metadata key, and its associated with a user
 116                 if (dest && (extname == "ssl"))
 117                 {
 118                         // if they dont already have an ssl flag, accept the remote server's
 119                         if (!dest->GetExt(extname))
 120                         {
 121                                 dest->Extend(extname);
 122                         }
 123                 }
 124                 else if (dest && (extname == "ssl_cert"))
 125                 {
 126                         if (dest->GetExt(extname))
 127                                 return;
 128
 129                         ssl_cert* cert = new ssl_cert;
 130                         dest->Extend(extname, cert);
 131
 132                         std::stringstream s(extdata);
 133                         std::string v;
 134                         getline(s,v,' ');
 135
 136                         cert->invalid = (v.find('v') != std::string::npos);
 137                         cert->trusted = (v.find('T') != std::string::npos);
 138                         cert->revoked = (v.find('R') != std::string::npos);
 139                         cert->unknownsigner = (v.find('s') != std::string::npos);
 140                         if (v.find('E') != std::string::npos)
 141                         {
 142                                 getline(s,cert->error,'\n');
 143                         }
 144                         else
 145                         {
 146                                 getline(s,cert->fingerprint,' ');
 147                                 getline(s,cert->dn,' ');
 148                                 getline(s,cert->issuer,'\n');
 149                         }
 150                 }
 151         }
 152
 153         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 154         {
 155                 std::stringstream hl(hostlist);
 156                 std::string xhost;
 157                 while (hl >> xhost)
 158                 {
 159                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 160                         {
 161                                 return true;
 162                         }
 163                 }
 164                 return false;
 165         }
 166
 167         virtual ModResult OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 168         {
 169                 irc::string pcmd = command.c_str();
 170
 171                 if ((pcmd == "OPER") && (validated))
 172                 {
 173                         ConfigReader cf(ServerInstance);
 174                         char TheHost[MAXBUF];
 175                         char TheIP[MAXBUF];
 176                         std::string LoginName;
 177                         std::string Password;
 178                         std::string OperType;
 179                         std::string HostName;
 180                         std::string HashType;
 181                         std::string FingerPrint;
 182                         bool SSLOnly;
 183                         ssl_cert* cert = NULL;
 184
 185                         snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
 186                         snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());
 187
 188                         user->GetExt("ssl_cert",cert);
 189
 190                         for (int i = 0; i < cf.Enumerate("oper"); i++)
 191                         {
 192                                 LoginName = cf.ReadValue("oper", "name", i);
 193                                 Password = cf.ReadValue("oper", "password", i);
 194                                 OperType = cf.ReadValue("oper", "type", i);
 195                                 HostName = cf.ReadValue("oper", "host", i);
 196                                 HashType = cf.ReadValue("oper", "hash", i);
 197                                 FingerPrint = cf.ReadValue("oper", "fingerprint", i);
 198                                 SSLOnly = cf.ReadFlag("oper", "sslonly", i);
 199
 200                                 if (FingerPrint.empty() && !SSLOnly)
 201                                         continue;
 202
 203                                 if (LoginName != parameters[0])
 204                                         continue;
 205
 206                                 if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
 207                                         continue;
 208
 209                                 if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
 210                                         continue;
 211
 212                                 if (SSLOnly && !user->GetExt("ssl"))
 213                                 {
 214                                         user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
 215                                         return MOD_RES_DENY;
 216                                 }
 217
 218                                 /*
 219                                  * No cert found or the fingerprint doesn't match
 220                                  */
 221                                 if ((!cert) || (cert->GetFingerprint() != FingerPrint))
 222                                 {
 223                                         user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
 224                                         ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
 225                                         ServerInstance->Logs->Log("m_ssl_oper_cert",DEFAULT,"OPER: Failed oper attempt by %s!%s@%s: credentials valid, but wrong fingerprint.", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
 226                                         return MOD_RES_DENY;
 227                                 }
 228                         }
 229                 }
 230
 231                 // Let core handle it for extra stuff
 232                 return MOD_RES_PASSTHRU;
 233         }
 234
 235
 236 };
 237
 238 MODULE_INIT(ModuleSSLInfo)
 239