src/modules/extra/m_sqlauth.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 using namespace std;
  18
  19 #include <stdio.h>
  20 #include <string>
  21 #include <stdlib.h>
  22 #include <time.h>
  23 #include <sys/types.h>
  24 #include <sys/socket.h>
  25 #include <sys/time.h>
  26 #include <string.h>
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <poll.h>
  31 #include "users.h"
  32 #include "channels.h"
  33 #include "modules.h"
  34 #include "inspircd.h"
  35 #include "helperfuncs.h"
  36 #include "m_sql.h"
  37
  38 /* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
  39
  40 Server *Srv;
  41
  42 class ModuleSQLAuth : public Module
  43 {
  44         ConfigReader* Conf;
  45         std::string usertable;
  46         std::string userfield;
  47         std::string passfield;
  48         std::string encryption;
  49         std::string killreason;
  50         std::string allowpattern;
  51         bool WallOperFail;
  52         unsigned long dbid;
  53         Module* SQLModule;
  54
  55  public:
  56         bool ReadConfig()
  57         {
  58                 Conf = new ConfigReader();
  59                 usertable = Conf->ReadValue("sqlauth","usertable",0);   // user table name
  60                 dbid = Conf->ReadInteger("sqlauth","dbid",0,true);      // database id of a database configured in m_sql (see m_sql config)
  61                 userfield = Conf->ReadValue("sqlauth","userfield",0);   // field name where username can be found
  62                 passfield = Conf->ReadValue("sqlauth","passfield",0);   // field name where password can be found
  63                 killreason = Conf->ReadValue("sqlauth","killreason",0); // reason to give when access is denied to a user (put your reg details here)
  64                 encryption = Conf->ReadValue("sqlauth","encryption",0); // name of sql function used to encrypt password, e.g. "md5" or "passwd".
  65                                                                         // define, but leave blank if no encryption is to be used.
  66                 WallOperFail = Conf->ReadFlag("sqlauth","verbose",0);   // set to 1 if failed connects should be reported to operators
  67                 allowpattern = Conf->ReadValue("sqlauth","allowpattern",0);     // allow nicks matching the pattern without requiring auth
  68                 delete Conf;
  69                 SQLModule = Srv->FindModule("m_sql.so");
  70                 if (!SQLModule)
  71                         Srv->Log(DEFAULT,"WARNING: m_sqlauth.so could not initialize because m_sql.so is not loaded. Load the module and rehash your server.");
  72                 return (SQLModule);
  73         }
  74
  75         ModuleSQLAuth(Server* Me)
  76                 : Module::Module(Me)
  77         {
  78                 Srv = Me;
  79                 ReadConfig();
  80         }
  81
  82         void Implements(char* List)
  83         {
  84                 List[I_OnRehash] = List[I_OnUserRegister] = 1;
  85         }
  86
  87         virtual void OnRehash(std::string parameter)
  88         {
  89                 ReadConfig();
  90         }
  91
  92         virtual void OnUserRegister(userrec* user)
  93         {
  94                 if ((allowpattern != "") && (Srv->MatchText(user->nick,allowpattern)))
  95                         return;
  96
  97                 if (!CheckCredentials(user->nick,user->password))
  98                 {
  99                         if (WallOperFail)
 100                                 WriteOpers("Forbidden connection from %s!%s@%s (invalid login/password)",user->nick,user->ident,user->host);
 101                         Srv->QuitUser(user,killreason);
 102                 }
 103         }
 104
 105         bool CheckCredentials(std::string username, std::string password)
 106         {
 107                 bool found = false;
 108
 109                 // is the sql module loaded? If not, we don't attempt to do anything.
 110                 if (!SQLModule)
 111                         return false;
 112
 113                 // sanitize the password (we dont want any mysql insertion exploits!)
 114                 std::string temp = "";
 115                 for (unsigned int q = 0; q < password.length(); q++)
 116                 {
 117                         if (password[q] == '\'')
 118                         {
 119                                 temp = temp + "\'";
 120                         }
 121                         else if (password[q] == '"')
 122                         {
 123                                 temp = temp + "\\\"";
 124                         }
 125                         else temp = temp + password[q];
 126                 }
 127                 password = temp;
 128
 129                 // Create a request containing the SQL query and send it to m_sql.so
 130                 SQLRequest* query = new SQLRequest(SQL_RESULT,dbid,"SELECT * FROM "+usertable+" WHERE "+userfield+"='"+username+"' AND "+passfield+"="+encryption+"('"+password+"')");
 131                 Request queryrequest((char*)query, this, SQLModule);
 132                 SQLResult* result = (SQLResult*)queryrequest.Send();
 133
 134                 // Did we get "OK" as a result?
 135                 if (result->GetType() == SQL_OK)
 136                 {
 137
 138                         // if we did, this means we may now request a row... there should be only one row for each user, so,
 139                         // we don't need to loop to fetch multiple rows.
 140                         SQLRequest* rowrequest = new SQLRequest(SQL_ROW,dbid,"");
 141                         Request rowquery((char*)rowrequest, this, SQLModule);
 142                         SQLResult* rowresult = (SQLResult*)rowquery.Send();
 143
 144                         // did we get a row? If we did, we can now do something with the fields
 145                         if (rowresult->GetType() == SQL_ROW)
 146                         {
 147                                 if (rowresult->GetField(userfield) == username)
 148                                 {
 149                                         // because the query directly asked for the password hash, we do not need to check it -
 150                                         // if it didnt match it wont be returned in the first place from the SELECT.
 151                                         // This just checks we didnt get an empty row by accident.
 152                                         found = true;
 153                                 }
 154                                 delete rowresult;
 155                         }
 156                         else
 157                         {
 158                                 // we didn't have a row.
 159                                 found = false;
 160                         }
 161                         delete rowrequest;
 162                         delete result;
 163                 }
 164                 else
 165                 {
 166                         // the query was bad
 167                         found = false;
 168                 }
 169                 query->SetQueryType(SQL_DONE);
 170                 query->SetConnID(dbid);
 171                 Request donerequest((char*)query, this, SQLModule);
 172                 donerequest.Send();
 173                 delete query;
 174                 return found;
 175         }
 176
 177         virtual ~ModuleSQLAuth()
 178         {
 179         }
 180
 181         virtual Version GetVersion()
 182         {
 183                 return Version(1,0,0,1,VF_VENDOR);
 184         }
 185
 186 };
 187
 188 class ModuleSQLAuthFactory : public ModuleFactory
 189 {
 190  public:
 191         ModuleSQLAuthFactory()
 192         {
 193         }
 194
 195         ~ModuleSQLAuthFactory()
 196         {
 197         }
 198
 199         virtual Module * CreateModule(Server* Me)
 200         {
 201                 return new ModuleSQLAuth(Me);
 202         }
 203
 204 };
 205
 206
 207 extern "C" void * init_module( void )
 208 {
 209         return new ModuleSQLAuthFactory;
 210 }
 211