src/modules/extra/m_sqlauth.cpp

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