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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd is copyright (C) 2002-2004 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
* <omster@gmail.com>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include <string>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"
#include "helperfuncs.h"
#include "m_sqlv2.h"
#include "m_sqlutils.h"
/* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
extern InspIRCd* ServerInstance;
class ModuleSQLAuth : public Module
{
Server* Srv;
Module* SQLutils;
std::string usertable;
std::string userfield;
std::string passfield;
std::string encryption;
std::string killreason;
std::string allowpattern;
std::string databaseid;
bool verbose;
public:
ModuleSQLAuth(Server* Me)
: Module::Module(Me), Srv(Me)
{
SQLutils = Srv->FindFeature("SQLutils");
if(SQLutils)
{
log(DEBUG, "Successfully got SQLutils pointer");
}
else
{
log(DEFAULT, "ERROR: This module requires a module offering the 'SQLutils' feature (usually m_sqlutils.so). Please load it and try again.");
throw ModuleException("This module requires a module offering the 'SQLutils' feature (usually m_sqlutils.so). Please load it and try again.");
}
OnRehash("");
}
void Implements(char* List)
{
List[I_OnUserDisconnect] = List[I_OnCheckReady] = List[I_OnRequest] = List[I_OnRehash] = List[I_OnUserRegister] = 1;
}
virtual void OnRehash(const std::string ¶meter)
{
ConfigReader Conf;
usertable = Conf.ReadValue("sqlauth", "usertable", 0); /* User table name */
databaseid = Conf.ReadValue("sqlauth", "dbid", 0); /* Database ID, given to the SQL service provider */
userfield = Conf.ReadValue("sqlauth", "userfield", 0); /* Field name where username can be found */
passfield = Conf.ReadValue("sqlauth", "passfield", 0); /* Field name where password can be found */
killreason = Conf.ReadValue("sqlauth", "killreason", 0); /* Reason to give when access is denied to a user (put your reg details here) */
allowpattern= Conf.ReadValue("sqlauth", "allowpattern",0 ); /* Allow nicks matching this pattern without requiring auth */
encryption = Conf.ReadValue("sqlauth", "encryption", 0); /* Name of sql function used to encrypt password, e.g. "md5" or "passwd".
* define, but leave blank if no encryption is to be used.
*/
verbose = Conf.ReadFlag("sqlauth", "verbose", 0); /* Set to true if failed connects should be reported to operators */
if (encryption.find("(") == std::string::npos)
{
encryption.append("(");
}
}
virtual void OnUserRegister(userrec* user)
{
if ((allowpattern != "") && (Srv->MatchText(user->nick,allowpattern)))
return;
if (!CheckCredentials(user))
{
userrec::QuitUser(ServerInstance,user,killreason);
}
}
bool CheckCredentials(userrec* user)
{
Module* target;
target = Srv->FindFeature("SQL");
if(target)
{
SQLrequest req = SQLreq(this, target, databaseid, "SELECT ? FROM ? WHERE ? = '?' AND ? = ?'?')", userfield, usertable, userfield, user->nick, passfield, encryption, user->password);
if(req.Send())
{
/* When we get the query response from the service provider we will be given an ID to play with,
* just an ID number which is unique to this query. We need a way of associating that ID with a userrec
* so we insert it into a map mapping the IDs to users.
* Thankfully m_sqlutils provides this, it will associate a ID with a user or channel, and if the user quits it removes the
* association. This means that if the user quits during a query we will just get a failed lookup from m_sqlutils - telling
* us to discard the query.
*/
log(DEBUG, "Sent query, got given ID %lu", req.id);
AssociateUser(this, SQLutils, req.id, user).Send();
return true;
}
else
{
log(DEBUG, "SQLrequest failed: %s", req.error.Str());
if (verbose)
ServerInstance->WriteOpers("Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick, user->ident, user->host, req.error.Str());
return false;
}
}
else
{
log(SPARSE, "WARNING: Couldn't find SQL provider module. NOBODY will be allowed to connect until it comes back unless they match an exception");
return false;
}
}
virtual char* OnRequest(Request* request)
{
if(strcmp(SQLRESID, request->GetId()) == 0)
{
SQLresult* res;
res = static_cast<SQLresult*>(request);
log(DEBUG, "Got SQL result (%s) with ID %lu", res->GetId(), res->id);
userrec* user = GetAssocUser(this, SQLutils, res->id).S().user;
UnAssociate(this, SQLutils, res->id).S();
if(user)
{
if(res->error.Id() == NO_ERROR)
{
log(DEBUG, "Associated query ID %lu with user %s", res->id, user->nick);
log(DEBUG, "Got result with %d rows and %d columns", res->Rows(), res->Cols());
if(res->Rows())
{
/* We got a row in the result, this is enough really */
user->Extend("sqlauthed");
}
else if (verbose)
{
/* No rows in result, this means there was no record matching the user */
ServerInstance->WriteOpers("Forbidden connection from %s!%s@%s (SQL query returned no matches)", user->nick, user->ident, user->host);
user->Extend("sqlauth_failed");
}
}
else if (verbose)
{
log(DEBUG, "Query failed: %s", res->error.Str());
ServerInstance->WriteOpers("Forbidden connection from %s!%s@%s (SQL query failed: %s)", user->nick, user->ident, user->host, res->error.Str());
user->Extend("sqlauth_failed");
}
}
else
{
log(DEBUG, "Got query with unknown ID, this probably means the user quit while the query was in progress");
}
return SQLSUCCESS;
}
log(DEBUG, "Got unsupported API version string: %s", request->GetId());
return NULL;
}
virtual void OnUserDisconnect(userrec* user)
{
user->Shrink("sqlauthed");
user->Shrink("sqlauth_failed");
}
virtual bool OnCheckReady(userrec* user)
{
if(user->GetExt("sqlauth_failed"))
{
userrec::QuitUser(ServerInstance,user,killreason);
return false;
}
return user->GetExt("sqlauthed");
}
virtual ~ModuleSQLAuth()
{
}
virtual Version GetVersion()
{
return Version(1,0,1,0,VF_VENDOR);
}
};
class ModuleSQLAuthFactory : public ModuleFactory
{
public:
ModuleSQLAuthFactory()
{
}
~ModuleSQLAuthFactory()
{
}
virtual Module * CreateModule(Server* Me)
{
return new ModuleSQLAuth(Me);
}
};
extern "C" void * init_module( void )
{
return new ModuleSQLAuthFactory;
}
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