src/modules/extra/m_sqloper.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 #include "configreader.h"
  20
  21 #include "m_sqlv2.h"
  22 #include "m_sqlutils.h"
  23 #include "m_hash.h"
  24 #include "commands/cmd_oper.h"
  25
  26 /* $ModDesc: Allows storage of oper credentials in an SQL table */
  27 /* $ModDep: m_sqlv2.h m_sqlutils.h */
  28
  29 class ModuleSQLOper : public Module
  30 {
  31         InspIRCd* Srv;
  32         Module* SQLutils;
  33         Module* HashModule;
  34         std::string databaseid;
  35
  36 public:
  37         ModuleSQLOper(InspIRCd* Me)
  38         : Module::Module(Me), Srv(Me)
  39         {
  40                 ServerInstance->UseInterface("SQLutils");
  41                 ServerInstance->UseInterface("SQL");
  42                 ServerInstance->UseInterface("HashRequest");
  43
  44                 /* Attempt to locate the md5 service provider, bail if we can't find it */
  45                 HashModule = ServerInstance->FindModule("m_md5.so");
  46                 if (!HashModule)
  47                         throw ModuleException("Can't find m_md5.so. Please load m_md5.so before m_sqloper.so.");
  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_sqloper.so.");
  52
  53                 OnRehash(NULL,"");
  54         }
  55
  56         virtual ~ModuleSQLOper()
  57         {
  58                 ServerInstance->DoneWithInterface("SQL");
  59                 ServerInstance->DoneWithInterface("SQLutils");
  60                 ServerInstance->DoneWithInterface("HashRequest");
  61         }
  62
  63         void Implements(char* List)
  64         {
  65                 List[I_OnRequest] = List[I_OnRehash] = List[I_OnPreCommand] = 1;
  66         }
  67
  68         virtual void OnRehash(userrec* user, const std::string &parameter)
  69         {
  70                 ConfigReader Conf(Srv);
  71
  72                 databaseid = Conf.ReadValue("sqloper", "dbid", 0); /* Database ID of a database configured for the service provider module */
  73         }
  74
  75         virtual int OnPreCommand(const std::string &command, const char** parameters, int pcnt, userrec *user, bool validated, const std::string &original_line)
  76         {
  77                 if ((validated) && (command == "OPER"))
  78                 {
  79                         if (LookupOper(user, parameters[0], parameters[1]))
  80                         {
  81                                 /* Returning true here just means the query is in progress, or on it's way to being
  82                                  * in progress. Nothing about the /oper actually being successful..
  83                                  * If the oper lookup fails later, we pass the command to the original handler
  84                                  * for /oper by calling its Handle method directly.
  85                                  */
  86                                 return 1;
  87                         }
  88                 }
  89                 return 0;
  90         }
  91
  92         bool LookupOper(userrec* user, const std::string &username, const std::string &password)
  93         {
  94                 Module* target;
  95
  96                 target = Srv->FindFeature("SQL");
  97
  98                 if (target)
  99                 {
 100                         /* Reset hash module first back to MD5 standard state */
 101                         HashResetRequest(this, HashModule).Send();
 102                         /* Make an MD5 hash of the password for using in the query */
 103                         std::string md5_pass_hash = HashSumRequest(this, HashModule, password.c_str()).Send();
 104
 105                         /* We generate our own MD5 sum here because some database providers (e.g. SQLite) dont have a builtin md5 function,
 106                          * also hashing it in the module and only passing a remote query containing a hash is more secure.
 107                          */
 108
 109                         SQLrequest req = SQLreq(this, target, databaseid, "SELECT username, password, hostname, type FROM ircd_opers WHERE username = '?' AND password='?'", username, md5_pass_hash);
 110
 111                         if (req.Send())
 112                         {
 113                                 /* When we get the query response from the service provider we will be given an ID to play with,
 114                                  * just an ID number which is unique to this query. We need a way of associating that ID with a userrec
 115                                  * so we insert it into a map mapping the IDs to users.
 116                                  * Thankfully m_sqlutils provides this, it will associate a ID with a user or channel, and if the user quits it removes the
 117                                  * association. This means that if the user quits during a query we will just get a failed lookup from m_sqlutils - telling
 118                                  * us to discard the query.
 119                                  */
 120                                 AssociateUser(this, SQLutils, req.id, user).Send();
 121
 122                                 user->Extend("oper_user", strdup(username.c_str()));
 123                                 user->Extend("oper_pass", strdup(password.c_str()));
 124
 125                                 return true;
 126                         }
 127                         else
 128                         {
 129                                 return false;
 130                         }
 131                 }
 132                 else
 133                 {
 134                         ServerInstance->Log(SPARSE, "WARNING: Couldn't find SQL provider module. NOBODY will be able to oper up unless their o:line is statically configured");
 135                         return false;
 136                 }
 137         }
 138
 139         virtual char* OnRequest(Request* request)
 140         {
 141                 if (strcmp(SQLRESID, request->GetId()) == 0)
 142                 {
 143                         SQLresult* res = static_cast<SQLresult*>(request);
 144
 145                         userrec* user = GetAssocUser(this, SQLutils, res->id).S().user;
 146                         UnAssociate(this, SQLutils, res->id).S();
 147
 148                         char* tried_user = NULL;
 149                         char* tried_pass = NULL;
 150
 151                         user->GetExt("oper_user", tried_user);
 152                         user->GetExt("oper_pass", tried_pass);
 153
 154                         if (user)
 155                         {
 156                                 if (res->error.Id() == NO_ERROR)
 157                                 {
 158                                         if (res->Rows())
 159                                         {
 160                                                 /* We got a row in the result, this means there was a record for the oper..
 161                                                  * now we just need to check if their host matches, and if it does then
 162                                                  * oper them up.
 163                                                  *
 164                                                  * We now (previous versions of the module didn't) support multiple SQL
 165                                                  * rows per-oper in the same way the config file does, all rows will be tried
 166                                                  * until one is found which matches. This is useful to define several different
 167                                                  * hosts for a single oper.
 168                                                  *
 169                                                  * The for() loop works as SQLresult::GetRowMap() returns an empty map when there
 170                                                  * are no more rows to return.
 171                                                  */
 172
 173                                                 for (SQLfieldMap& row = res->GetRowMap(); row.size(); row = res->GetRowMap())
 174                                                 {
 175                                                         if (OperUser(user, row["username"].d, row["password"].d, row["hostname"].d, row["type"].d))
 176                                                         {
 177                                                                 /* If/when one of the rows matches, stop checking and return */
 178                                                                 return SQLSUCCESS;
 179                                                         }
 180                                                         if (tried_user && tried_pass)
 181                                                         {
 182                                                                 LoginFail(user, tried_user, tried_pass);
 183                                                                 free(tried_user);
 184                                                                 free(tried_pass);
 185                                                                 user->Shrink("oper_user");
 186                                                                 user->Shrink("oper_pass");
 187                                                         }
 188                                                 }
 189                                         }
 190                                         else
 191                                         {
 192                                                 /* No rows in result, this means there was no oper line for the user,
 193                                                  * we should have already checked the o:lines so now we need an
 194                                                  * "insufficient awesomeness" (invalid credentials) error
 195                                                  */
 196                                                 if (tried_user && tried_pass)
 197                                                 {
 198                                                         LoginFail(user, tried_user, tried_pass);
 199                                                         free(tried_user);
 200                                                         free(tried_pass);
 201                                                         user->Shrink("oper_user");
 202                                                         user->Shrink("oper_pass");
 203                                                 }
 204                                         }
 205                                 }
 206                                 else
 207                                 {
 208                                         /* This one shouldn't happen, the query failed for some reason.
 209                                          * We have to fail the /oper request and give them the same error
 210                                          * as above.
 211                                          */
 212                                         if (tried_user && tried_pass)
 213                                         {
 214                                                 LoginFail(user, tried_user, tried_pass);
 215                                                 free(tried_user);
 216                                                 free(tried_pass);
 217                                                 user->Shrink("oper_user");
 218                                                 user->Shrink("oper_pass");
 219                                         }
 220
 221                                 }
 222                         }
 223
 224                         return SQLSUCCESS;
 225                 }
 226
 227                 return NULL;
 228         }
 229
 230         void LoginFail(userrec* user, const std::string &username, const std::string &pass)
 231         {
 232                 command_t* oper_command = ServerInstance->Parser->GetHandler("OPER");
 233
 234                 if (oper_command)
 235                 {
 236                         const char* params[] = { username.c_str(), pass.c_str() };
 237                         oper_command->Handle(params, 2, user);
 238                 }
 239                 else
 240                 {
 241                         ServerInstance->Log(DEBUG, "BUG: WHAT?! Why do we have no OPER command?!");
 242                 }
 243         }
 244
 245         bool OperUser(userrec* user, const std::string &username, const std::string &password, const std::string &pattern, const std::string &type)
 246         {
 247                 ConfigReader Conf(Srv);
 248
 249                 for (int j = 0; j < Conf.Enumerate("type"); j++)
 250                 {
 251                         std::string tname = Conf.ReadValue("type","name",j);
 252                         std::string hostname(user->ident);
 253
 254                         hostname.append("@").append(user->host);
 255
 256                         if ((tname == type) && OneOfMatches(hostname.c_str(), user->GetIPString(), pattern.c_str()))
 257                         {
 258                                 /* Opertype and host match, looks like this is it. */
 259                                 std::string operhost = Conf.ReadValue("type", "host", j);
 260
 261                                 if (operhost.size())
 262                                         user->ChangeDisplayedHost(operhost.c_str());
 263
 264                                 Srv->SNO->WriteToSnoMask('o',"%s (%s@%s) is now an IRC operator of type %s", user->nick, user->ident, user->host, type.c_str());
 265                                 user->WriteServ("381 %s :You are now an IRC operator of type %s", user->nick, type.c_str());
 266
 267                                 if (!user->modes[UM_OPERATOR])
 268                                         user->Oper(type);
 269
 270                                 return true;
 271                         }
 272                 }
 273
 274                 return false;
 275         }
 276
 277         virtual Version GetVersion()
 278         {
 279                 return Version(1,1,1,0,VF_VENDOR,API_VERSION);
 280         }
 281
 282 };
 283
 284 class ModuleSQLOperFactory : public ModuleFactory
 285 {
 286  public:
 287         ModuleSQLOperFactory()
 288         {
 289         }
 290
 291         ~ModuleSQLOperFactory()
 292         {
 293         }
 294
 295         virtual Module * CreateModule(InspIRCd* Me)
 296         {
 297                 return new ModuleSQLOper(Me);
 298         }
 299
 300 };
 301
 302
 303 extern "C" void * init_module( void )
 304 {
 305         return new ModuleSQLOperFactory;
 306 }
 307