src/modules/extra/m_sqlauth.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include <string>
  15 #include "users.h"
  16 #include "channels.h"
  17 #include "modules.h"
  18 #include "inspircd.h"
  19
  20 #include "m_sqlv2.h"
  21 #include "m_sqlutils.h"
  22
  23 /* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
  24 /* $ModDep: m_sqlv2.h m_sqlutils.h */
  25
  26 class ModuleSQLAuth : public Module
  27 {
  28         InspIRCd* Srv;
  29         Module* SQLutils;
  30         Module* SQLprovider;
  31
  32         std::string usertable;
  33         std::string userfield;
  34         std::string passfield;
  35         std::string encryption;
  36         std::string killreason;
  37         std::string allowpattern;
  38         std::string databaseid;
  39
  40         bool verbose;
  41
  42 public:
  43         ModuleSQLAuth(InspIRCd* Me)
  44         : Module::Module(Me), Srv(Me)
  45         {
  46                 ServerInstance->UseInterface("SQLutils");
  47                 ServerInstance->UseInterface("SQL");
  48
  49                 SQLutils = ServerInstance->FindModule("m_sqlutils.so");
  50                 if (!SQLutils)
  51                         throw ModuleException("Can't find m_sqlutils.so. Please load m_sqlutils.so before m_sqlauth.so.");
  52
  53                 OnRehash(NULL,"");
  54         }
  55
  56         virtual ~ModuleSQLAuth()
  57         {
  58                 ServerInstance->DoneWithInterface("SQL");
  59                 ServerInstance->DoneWithInterface("SQLutils");
  60         }
  61
  62         void Implements(char* List)
  63         {
  64                 List[I_OnUserDisconnect] = List[I_OnCheckReady] = List[I_OnRequest] = List[I_OnRehash] = List[I_OnUserRegister] = 1;
  65         }
  66
  67         virtual void OnRehash(userrec* user, const std::string &parameter)
  68         {
  69                 ConfigReader Conf(Srv);
  70
  71                 usertable       = Conf.ReadValue("sqlauth", "usertable", 0);    /* User table name */
  72                 databaseid      = Conf.ReadValue("sqlauth", "dbid", 0);                 /* Database ID, given to the SQL service provider */
  73                 userfield       = Conf.ReadValue("sqlauth", "userfield", 0);    /* Field name where username can be found */
  74                 passfield       = Conf.ReadValue("sqlauth", "passfield", 0);    /* Field name where password can be found */
  75                 killreason      = Conf.ReadValue("sqlauth", "killreason", 0);   /* Reason to give when access is denied to a user (put your reg details here) */
  76                 allowpattern= Conf.ReadValue("sqlauth", "allowpattern",0 );     /* Allow nicks matching this pattern without requiring auth */
  77                 encryption      = Conf.ReadValue("sqlauth", "encryption", 0);   /* Name of sql function used to encrypt password, e.g. "md5" or "passwd".
  78                                                                                                                                          * define, but leave blank if no encryption is to be used.
  79                                                                                                                                          */
  80                 verbose         = Conf.ReadFlag("sqlauth", "verbose", 0);               /* Set to true if failed connects should be reported to operators */
  81
  82                 if (encryption.find("(") == std::string::npos)
  83                 {
  84                         encryption.append("(");
  85                 }
  86         }
  87
  88         virtual int OnUserRegister(userrec* user)
  89         {
  90                 if ((allowpattern != "") && (Srv->MatchText(user->nick,allowpattern)))
  91                 {
  92                         user->Extend("sqlauthed");
  93                         return 0;
  94                 }
  95
  96                 if (!CheckCredentials(user))
  97                 {
  98                         userrec::QuitUser(Srv,user,killreason);
  99                         return 1;
 100                 }
 101                 return 0;
 102         }
 103
 104         bool CheckCredentials(userrec* user)
 105         {
 106                 Module* target;
 107
 108                 target = Srv->FindFeature("SQL");
 109
 110                 if(target)
 111                 {
 112                         SQLrequest req = SQLreq(this, target, databaseid, "SELECT ? FROM ? WHERE ? = '?' AND ? = ?'?')", userfield, usertable, userfield, user->nick, passfield, encryption, user->password);
 113
 114                         if(req.Send())
 115                         {
 116                                 /* When we get the query response from the service provider we will be given an ID to play with,
 117                                  * just an ID number which is unique to this query. We need a way of associating that ID with a userrec
 118                                  * so we insert it into a map mapping the IDs to users.
 119                                  * Thankfully m_sqlutils provides this, it will associate a ID with a user or channel, and if the user quits it removes the
 120                                  * association. This means that if the user quits during a query we will just get a failed lookup from m_sqlutils - telling
 121                                  * us to discard the query.
 122                                  */
 123                                 AssociateUser(this, SQLutils, req.id, user).Send();
 124
 125                                 return true;
 126                         }
 127                         else
 128                         {
 129                                 if (verbose)
 130                                         Srv->WriteOpers("Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick, user->ident, user->host, req.error.Str());
 131                                 return false;
 132                         }
 133                 }
 134                 else
 135                 {
 136                         ServerInstance->Log(SPARSE, "WARNING: Couldn't find SQL provider module. NOBODY will be allowed to connect until it comes back unless they match an exception");
 137                         return false;
 138                 }
 139         }
 140
 141         virtual char* OnRequest(Request* request)
 142         {
 143                 if(strcmp(SQLRESID, request->GetId()) == 0)
 144                 {
 145                         SQLresult* res = static_cast<SQLresult*>(request);
 146
 147                         userrec* user = GetAssocUser(this, SQLutils, res->id).S().user;
 148                         UnAssociate(this, SQLutils, res->id).S();
 149
 150                         if(user)
 151                         {
 152                                 if(res->error.Id() == NO_ERROR)
 153                                 {
 154                                         if(res->Rows())
 155                                         {
 156                                                 /* We got a row in the result, this is enough really */
 157                                                 user->Extend("sqlauthed");
 158                                         }
 159                                         else if (verbose)
 160                                         {
 161                                                 /* No rows in result, this means there was no record matching the user */
 162                                                 Srv->WriteOpers("Forbidden connection from %s!%s@%s (SQL query returned no matches)", user->nick, user->ident, user->host);
 163                                                 user->Extend("sqlauth_failed");
 164                                         }
 165                                 }
 166                                 else if (verbose)
 167                                 {
 168                                         Srv->WriteOpers("Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick, user->ident, user->host, res->error.Str());
 169                                         user->Extend("sqlauth_failed");
 170                                 }
 171                         }
 172                         else
 173                         {
 174                                 return NULL;
 175                         }
 176
 177                         if (!user->GetExt("sqlauthed"))
 178                         {
 179                                 userrec::QuitUser(Srv,user,killreason);
 180                         }
 181                         return SQLSUCCESS;
 182                 }
 183                 return NULL;
 184         }
 185
 186         virtual void OnUserDisconnect(userrec* user)
 187         {
 188                 user->Shrink("sqlauthed");
 189                 user->Shrink("sqlauth_failed");
 190         }
 191
 192         virtual bool OnCheckReady(userrec* user)
 193         {
 194                 return user->GetExt("sqlauthed");
 195         }
 196
 197         virtual Version GetVersion()
 198         {
 199                 return Version(1,1,1,0,VF_VENDOR,API_VERSION);
 200         }
 201
 202 };
 203
 204 class ModuleSQLAuthFactory : public ModuleFactory
 205 {
 206  public:
 207         ModuleSQLAuthFactory()
 208         {
 209         }
 210
 211         ~ModuleSQLAuthFactory()
 212         {
 213         }
 214
 215         virtual Module * CreateModule(InspIRCd* Me)
 216         {
 217                 return new ModuleSQLAuth(Me);
 218         }
 219
 220 };
 221
 222
 223 extern "C" void * init_module( void )
 224 {
 225         return new ModuleSQLAuthFactory;
 226 }