src/modules/m_sqlauth.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 "m_sqlv2.h"
  16 #include "m_sqlutils.h"
  17 #include "m_hash.h"
  18
  19 /* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
  20 /* $ModDep: m_sqlv2.h m_sqlutils.h m_hash.h */
  21
  22 class ModuleSQLAuth : public Module
  23 {
  24         LocalIntExt sqlAuthed;
  25         Module* SQLutils;
  26         Module* SQLprovider;
  27
  28         std::string freeformquery;
  29         std::string killreason;
  30         std::string allowpattern;
  31         std::string databaseid;
  32
  33         bool verbose;
  34
  35 public:
  36         ModuleSQLAuth() : sqlAuthed("sqlauth", this)
  37         {
  38                 ServerInstance->Modules->UseInterface("SQLutils");
  39                 ServerInstance->Modules->UseInterface("SQL");
  40
  41                 SQLutils = ServerInstance->Modules->Find("m_sqlutils.so");
  42                 if (!SQLutils)
  43                         throw ModuleException("Can't find m_sqlutils.so. Please load m_sqlutils.so before m_sqlauth.so.");
  44
  45                 SQLprovider = ServerInstance->Modules->FindFeature("SQL");
  46                 if (!SQLprovider)
  47                         throw ModuleException("Can't find an SQL provider module. Please load one before attempting to load m_sqlauth.");
  48
  49                 OnRehash(NULL);
  50                 Implementation eventlist[] = { I_OnUserDisconnect, I_OnCheckReady, I_OnRehash, I_OnUserRegister };
  51                 ServerInstance->Modules->Attach(eventlist, this, 4);
  52         }
  53
  54         virtual ~ModuleSQLAuth()
  55         {
  56                 ServerInstance->Modules->DoneWithInterface("SQL");
  57                 ServerInstance->Modules->DoneWithInterface("SQLutils");
  58         }
  59
  60
  61         void OnRehash(User* user)
  62         {
  63                 ConfigReader Conf;
  64
  65                 databaseid      = Conf.ReadValue("sqlauth", "dbid", 0);                 /* Database ID, given to the SQL service provider */
  66                 freeformquery   = Conf.ReadValue("sqlauth", "query", 0);        /* Field name where username can be found */
  67                 killreason      = Conf.ReadValue("sqlauth", "killreason", 0);   /* Reason to give when access is denied to a user (put your reg details here) */
  68                 allowpattern    = Conf.ReadValue("sqlauth", "allowpattern",0 ); /* Allow nicks matching this pattern without requiring auth */
  69                 verbose         = Conf.ReadFlag("sqlauth", "verbose", 0);               /* Set to true if failed connects should be reported to operators */
  70         }
  71
  72         ModResult OnUserRegister(User* user)
  73         {
  74                 if ((!allowpattern.empty()) && (InspIRCd::Match(user->nick,allowpattern)))
  75                 {
  76                         sqlAuthed.set(user, 1);
  77                         return MOD_RES_PASSTHRU;
  78                 }
  79
  80                 if (!CheckCredentials(user))
  81                 {
  82                         ServerInstance->Users->QuitUser(user, killreason);
  83                         return MOD_RES_DENY;
  84                 }
  85                 return MOD_RES_PASSTHRU;
  86         }
  87
  88         bool CheckCredentials(User* user)
  89         {
  90                 std::string thisquery = freeformquery;
  91                 std::string safepass = user->password;
  92                 std::string safegecos = user->fullname;
  93
  94                 /* Search and replace the escaped nick and escaped pass into the query */
  95
  96                 SearchAndReplace(safepass, std::string("\""), std::string("\\\""));
  97                 SearchAndReplace(safegecos, std::string("\""), std::string("\\\""));
  98
  99                 SearchAndReplace(thisquery, std::string("$nick"), user->nick);
 100                 SearchAndReplace(thisquery, std::string("$pass"), safepass);
 101                 SearchAndReplace(thisquery, std::string("$host"), user->host);
 102                 SearchAndReplace(thisquery, std::string("$ip"), std::string(user->GetIPString()));
 103                 SearchAndReplace(thisquery, std::string("$gecos"), safegecos);
 104                 SearchAndReplace(thisquery, std::string("$ident"), user->ident);
 105                 SearchAndReplace(thisquery, std::string("$server"), std::string(user->server));
 106                 SearchAndReplace(thisquery, std::string("$uuid"), user->uuid);
 107
 108                 Module* HashMod = ServerInstance->Modules->Find("m_md5.so");
 109
 110                 if (HashMod)
 111                 {
 112                         SearchAndReplace(thisquery, std::string("$md5pass"), HashRequest(this, HashMod, user->password).hex());
 113                 }
 114
 115                 HashMod = ServerInstance->Modules->Find("m_sha256.so");
 116
 117                 if (HashMod)
 118                 {
 119                         SearchAndReplace(thisquery, std::string("$sha256pass"), HashRequest(this, HashMod, user->password).hex());
 120                 }
 121
 122                 /* Build the query */
 123                 SQLrequest req = SQLrequest(this, SQLprovider, databaseid, SQLquery(thisquery));
 124
 125                 req.Send();
 126                 /* When we get the query response from the service provider we will be given an ID to play with,
 127                  * just an ID number which is unique to this query. We need a way of associating that ID with a User
 128                  * so we insert it into a map mapping the IDs to users.
 129                  * Thankfully m_sqlutils provides this, it will associate a ID with a user or channel, and if the user quits it removes the
 130                  * association. This means that if the user quits during a query we will just get a failed lookup from m_sqlutils - telling
 131                  * us to discard the query.
 132                  */
 133                 AssociateUser(this, SQLutils, req.id, user).Send();
 134
 135                 return true;
 136         }
 137
 138         void OnRequest(Request& request)
 139         {
 140                 if(strcmp(SQLRESID, request.id) == 0)
 141                 {
 142                         SQLresult* res = static_cast<SQLresult*>(&request);
 143
 144                         User* user = GetAssocUser(this, SQLutils, res->id).S().user;
 145                         UnAssociate(this, SQLutils, res->id).S();
 146
 147                         if(user)
 148                         {
 149                                 if(res->error.Id() == SQL_NO_ERROR)
 150                                 {
 151                                         if(res->Rows())
 152                                         {
 153                                                 /* We got a row in the result, this is enough really */
 154                                                 sqlAuthed.set(user, 1);
 155                                         }
 156                                         else if (verbose)
 157                                         {
 158                                                 /* No rows in result, this means there was no record matching the user */
 159                                                 ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s!%s@%s (SQL query returned no matches)", user->nick.c_str(), user->ident.c_str(), user->host.c_str());
 160                                         }
 161                                 }
 162                                 else if (verbose)
 163                                 {
 164                                         ServerInstance->SNO->WriteGlobalSno('a', "Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick.c_str(), user->ident.c_str(), user->host.c_str(), res->error.Str());
 165                                 }
 166                         }
 167                         else
 168                         {
 169                                 return;
 170                         }
 171
 172                         if (!sqlAuthed.get(user))
 173                         {
 174                                 ServerInstance->Users->QuitUser(user, killreason);
 175                         }
 176                 }
 177         }
 178
 179         ModResult OnCheckReady(User* user)
 180         {
 181                 return sqlAuthed.get(user) ? MOD_RES_PASSTHRU : MOD_RES_DENY;
 182         }
 183
 184         Version GetVersion()
 185         {
 186                 return Version("Allow/Deny connections based upon an arbitary SQL table", VF_VENDOR);
 187         }
 188
 189 };
 190
 191 MODULE_INIT(ModuleSQLAuth)