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) : Command(Instance,"SSLINFO", 0, 1)
  25         {
  26                 this->source = "m_sslinfo.so";
  27                 this->syntax = "<nick>";
  28         }
  29
  30         CmdResult Handle (const std::vector<std::string> &parameters, User *user)
  31         {
  32                 User* target = ServerInstance->FindNick(parameters[0]);
  33                 ssl_cert* cert;
  34
  35                 if (target)
  36                 {
  37                         if (target->GetExt("ssl_cert", cert))
  38                         {
  39                                 if (cert->GetError().length())
  40                                 {
  41                                         user->WriteServ("NOTICE %s :*** No SSL certificate information for this user (%s).", user->nick.c_str(), cert->GetError().c_str());
  42                                 }
  43                                 else
  44                                 {
  45                                         user->WriteServ("NOTICE %s :*** Distinguised Name: %s", user->nick.c_str(), cert->GetDN().c_str());
  46                                         user->WriteServ("NOTICE %s :*** Issuer:            %s", user->nick.c_str(), cert->GetIssuer().c_str());
  47                                         user->WriteServ("NOTICE %s :*** Key Fingerprint:   %s", user->nick.c_str(), cert->GetFingerprint().c_str());
  48                                 }
  49                                 return CMD_LOCALONLY;
  50                         }
  51                         else
  52                         {
  53                                 user->WriteServ("NOTICE %s :*** No SSL certificate information for this user.", user->nick.c_str());
  54                                 return CMD_FAILURE;
  55                         }
  56                 }
  57                 else
  58                         user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nickname", user->nick.c_str(), parameters[0].c_str());
  59
  60                 return CMD_FAILURE;
  61         }
  62 };
  63
  64 class ModuleSSLInfo : public Module
  65 {
  66         CommandSSLInfo cmd;
  67  public:
  68         ModuleSSLInfo(InspIRCd* Me)
  69                 : Module(Me), cmd(Me)
  70         {
  71                 ServerInstance->AddCommand(&cmd);
  72
  73                 Implementation eventlist[] = { I_OnSyncUserMetaData, I_OnDecodeMetaData, I_OnWhois, I_OnPreCommand };
  74                 ServerInstance->Modules->Attach(eventlist, this, 4);
  75         }
  76
  77
  78         virtual ~ModuleSSLInfo()
  79         {
  80         }
  81
  82         virtual Version GetVersion()
  83         {
  84                 return Version("$Id$", VF_VENDOR, API_VERSION);
  85         }
  86
  87         virtual void OnWhois(User* source, User* dest)
  88         {
  89                 if(dest->GetExt("ssl"))
  90                 {
  91                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
  92                 }
  93         }
  94
  95         virtual void OnSyncUserMetaData(User* user, Module* proto, void* opaque, const std::string &extname, bool displayable)
  96         {
  97                 // check if the linking module wants to know about OUR metadata
  98                 if (extname == "ssl")
  99                 {
 100                         // check if this user has an ssl field to send
 101                         if (!user->GetExt(extname))
 102                                 return;
 103
 104                         // call this function in the linking module, let it format the data how it
 105                         // sees fit, and send it on its way. We dont need or want to know how.
 106                         proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON");
 107                 }
 108                 else if (extname == "ssl_cert")
 109                 {
 110                         ssl_cert* cert;
 111                         if (!user->GetExt("ssl_cert", cert))
 112                                 return;
 113
 114                         proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, cert->GetMetaLine().c_str());
 115                 }
 116         }
 117
 118         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 119         {
 120                 // check if its our metadata key, and its associated with a user
 121                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 122                 {
 123                         User* dest = static_cast<User*>(target);
 124                         // if they dont already have an ssl flag, accept the remote server's
 125                         if (!dest->GetExt(extname))
 126                         {
 127                                 dest->Extend(extname);
 128                         }
 129                 }
 130                 else if ((target_type == TYPE_USER) && (extname == "ssl_cert"))
 131                 {
 132                         User* dest = static_cast<User*>(target);
 133                         if (dest->GetExt(extname))
 134                                 return;
 135
 136                         ssl_cert* cert = new ssl_cert;
 137                         dest->Extend(extname, cert);
 138
 139                         std::stringstream s(extdata);
 140                         std::string v;
 141                         getline(s,v,' ');
 142
 143                         cert->invalid = (v.find('v') != std::string::npos);
 144                         cert->trusted = (v.find('T') != std::string::npos);
 145                         cert->revoked = (v.find('R') != std::string::npos);
 146                         cert->unknownsigner = (v.find('s') != std::string::npos);
 147                         if (v.find('E') != std::string::npos)
 148                         {
 149                                 getline(s,cert->error,'\n');
 150                         }
 151                         else
 152                         {
 153                                 getline(s,cert->fingerprint,' ');
 154                                 getline(s,cert->dn,' ');
 155                                 getline(s,cert->issuer,'\n');
 156                         }
 157                 }
 158         }
 159
 160         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 161         {
 162                 std::stringstream hl(hostlist);
 163                 std::string xhost;
 164                 while (hl >> xhost)
 165                 {
 166                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 167                         {
 168                                 return true;
 169                         }
 170                 }
 171                 return false;
 172         }
 173
 174         virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 175         {
 176                 irc::string cmd = command.c_str();
 177
 178                 if ((cmd == "OPER") && (validated))
 179                 {
 180                         ConfigReader cf(ServerInstance);
 181                         char TheHost[MAXBUF];
 182                         char TheIP[MAXBUF];
 183                         std::string LoginName;
 184                         std::string Password;
 185                         std::string OperType;
 186                         std::string HostName;
 187                         std::string HashType;
 188                         std::string FingerPrint;
 189                         bool SSLOnly;
 190                         ssl_cert* cert = NULL;
 191
 192                         snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
 193                         snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());
 194
 195                         user->GetExt("ssl_cert",cert);
 196
 197                         for (int i = 0; i < cf.Enumerate("oper"); i++)
 198                         {
 199                                 LoginName = cf.ReadValue("oper", "name", i);
 200                                 Password = cf.ReadValue("oper", "password", i);
 201                                 OperType = cf.ReadValue("oper", "type", i);
 202                                 HostName = cf.ReadValue("oper", "host", i);
 203                                 HashType = cf.ReadValue("oper", "hash", i);
 204                                 FingerPrint = cf.ReadValue("oper", "fingerprint", i);
 205                                 SSLOnly = cf.ReadFlag("oper", "sslonly", i);
 206
 207                                 if (FingerPrint.empty() && !SSLOnly)
 208                                         continue;
 209
 210                                 if (LoginName != parameters[0])
 211                                         continue;
 212
 213                                 if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
 214                                         continue;
 215
 216                                 if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
 217                                         continue;
 218
 219                                 if (SSLOnly && !user->GetExt("ssl"))
 220                                 {
 221                                         user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
 222                                         return 1;
 223                                 }
 224
 225                                 /*
 226                                  * No cert found or the fingerprint doesn't match
 227                                  */
 228                                 if ((!cert) || (cert->GetFingerprint() != FingerPrint))
 229                                 {
 230                                         user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
 231                                         ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
 232                                         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());
 233                                         return 1;
 234                                 }
 235                         }
 236                 }
 237
 238                 // Let core handle it for extra stuff
 239                 return 0;
 240         }
 241
 242
 243 };
 244
 245 MODULE_INIT(ModuleSSLInfo)
 246