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* newcommand;
  67  public:
  68         ModuleSSLInfo(InspIRCd* Me)
  69                 : Module(Me)
  70         {
  71                 newcommand = new CommandSSLInfo(ServerInstance);
  72                 ServerInstance->AddCommand(newcommand);
  73
  74                 Implementation eventlist[] = { I_OnSyncUserMetaData, I_OnDecodeMetaData, I_OnWhois, I_OnPreCommand };
  75                 ServerInstance->Modules->Attach(eventlist, this, 4);
  76         }
  77
  78
  79         virtual ~ModuleSSLInfo()
  80         {
  81         }
  82
  83         virtual Version GetVersion()
  84         {
  85                 return Version("$Id$", VF_VENDOR, API_VERSION);
  86         }
  87
  88         virtual void OnWhois(User* source, User* dest)
  89         {
  90                 if(dest->GetExt("ssl"))
  91                 {
  92                         ServerInstance->SendWhoisLine(source, dest, 320, "%s %s :is using a secure connection", source->nick.c_str(), dest->nick.c_str());
  93                 }
  94         }
  95
  96         virtual void OnSyncUserMetaData(User* user, Module* proto, void* opaque, const std::string &extname, bool displayable)
  97         {
  98                 // check if the linking module wants to know about OUR metadata
  99                 if (extname == "ssl")
 100                 {
 101                         // check if this user has an ssl field to send
 102                         if (!user->GetExt(extname))
 103                                 return;
 104
 105                         // call this function in the linking module, let it format the data how it
 106                         // sees fit, and send it on its way. We dont need or want to know how.
 107                         proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, displayable ? "Enabled" : "ON");
 108                 }
 109                 else if (extname == "ssl_cert")
 110                 {
 111                         ssl_cert* cert;
 112                         if (!user->GetExt("ssl_cert", cert))
 113                                 return;
 114
 115                         proto->ProtoSendMetaData(opaque, TYPE_USER, user, extname, cert->GetMetaLine().c_str());
 116                 }
 117         }
 118
 119         virtual void OnDecodeMetaData(int target_type, void* target, const std::string &extname, const std::string &extdata)
 120         {
 121                 // check if its our metadata key, and its associated with a user
 122                 if ((target_type == TYPE_USER) && (extname == "ssl"))
 123                 {
 124                         User* dest = static_cast<User*>(target);
 125                         // if they dont already have an ssl flag, accept the remote server's
 126                         if (!dest->GetExt(extname))
 127                         {
 128                                 dest->Extend(extname);
 129                         }
 130                 }
 131                 else if ((target_type == TYPE_USER) && (extname == "ssl_cert"))
 132                 {
 133                         User* dest = static_cast<User*>(target);
 134                         if (dest->GetExt(extname))
 135                                 return;
 136
 137                         ssl_cert* cert = new ssl_cert;
 138                         dest->Extend(extname, cert);
 139
 140                         std::stringstream s(extdata);
 141                         std::string v;
 142                         getline(s,v,' ');
 143
 144                         cert->invalid = (v.find('v') != std::string::npos);
 145                         cert->trusted = (v.find('T') != std::string::npos);
 146                         cert->revoked = (v.find('R') != std::string::npos);
 147                         cert->unknownsigner = (v.find('s') != std::string::npos);
 148                         if (v.find('E') != std::string::npos)
 149                         {
 150                                 getline(s,cert->error,'\n');
 151                         }
 152                         else
 153                         {
 154                                 getline(s,cert->fingerprint,' ');
 155                                 getline(s,cert->dn,' ');
 156                                 getline(s,cert->issuer,'\n');
 157                         }
 158                 }
 159         }
 160
 161         bool OneOfMatches(const char* host, const char* ip, const char* hostlist)
 162         {
 163                 std::stringstream hl(hostlist);
 164                 std::string xhost;
 165                 while (hl >> xhost)
 166                 {
 167                         if (InspIRCd::Match(host, xhost, ascii_case_insensitive_map) || InspIRCd::MatchCIDR(ip, xhost, ascii_case_insensitive_map))
 168                         {
 169                                 return true;
 170                         }
 171                 }
 172                 return false;
 173         }
 174
 175         virtual int OnPreCommand(std::string &command, std::vector<std::string> &parameters, User *user, bool validated, const std::string &original_line)
 176         {
 177                 irc::string cmd = command.c_str();
 178
 179                 if ((cmd == "OPER") && (validated))
 180                 {
 181                         ConfigReader cf(ServerInstance);
 182                         char TheHost[MAXBUF];
 183                         char TheIP[MAXBUF];
 184                         std::string LoginName;
 185                         std::string Password;
 186                         std::string OperType;
 187                         std::string HostName;
 188                         std::string HashType;
 189                         std::string FingerPrint;
 190                         bool SSLOnly;
 191                         ssl_cert* cert = NULL;
 192
 193                         snprintf(TheHost,MAXBUF,"%s@%s",user->ident.c_str(),user->host.c_str());
 194                         snprintf(TheIP, MAXBUF,"%s@%s",user->ident.c_str(),user->GetIPString());
 195
 196                         user->GetExt("ssl_cert",cert);
 197
 198                         for (int i = 0; i < cf.Enumerate("oper"); i++)
 199                         {
 200                                 LoginName = cf.ReadValue("oper", "name", i);
 201                                 Password = cf.ReadValue("oper", "password", i);
 202                                 OperType = cf.ReadValue("oper", "type", i);
 203                                 HostName = cf.ReadValue("oper", "host", i);
 204                                 HashType = cf.ReadValue("oper", "hash", i);
 205                                 FingerPrint = cf.ReadValue("oper", "fingerprint", i);
 206                                 SSLOnly = cf.ReadFlag("oper", "sslonly", i);
 207
 208                                 if (FingerPrint.empty() && !SSLOnly)
 209                                         continue;
 210
 211                                 if (LoginName != parameters[0])
 212                                         continue;
 213
 214                                 if (!OneOfMatches(TheHost, TheIP, HostName.c_str()))
 215                                         continue;
 216
 217                                 if (Password.length() && ServerInstance->PassCompare(user, Password.c_str(),parameters[1].c_str(), HashType.c_str()))
 218                                         continue;
 219
 220                                 if (SSLOnly && !user->GetExt("ssl"))
 221                                 {
 222                                         user->WriteNumeric(491, "%s :This oper login name requires an SSL connection.", user->nick.c_str());
 223                                         return 1;
 224                                 }
 225
 226                                 /*
 227                                  * No cert found or the fingerprint doesn't match
 228                                  */
 229                                 if ((!cert) || (cert->GetFingerprint() != FingerPrint))
 230                                 {
 231                                         user->WriteNumeric(491, "%s :This oper login name requires a matching key fingerprint.",user->nick.c_str());
 232                                         ServerInstance->SNO->WriteToSnoMask('o',"'%s' cannot oper, does not match fingerprint", user->nick.c_str());
 233                                         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());
 234                                         return 1;
 235                                 }
 236                         }
 237                 }
 238
 239                 // Let core handle it for extra stuff
 240                 return 0;
 241         }
 242
 243
 244 };
 245
 246 MODULE_INIT(ModuleSSLInfo)
 247