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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* Inspire is copyright (C) 2002-2004 ChatSpike-Dev.
* E-mail:
* <brain@chatspike.net>
* <Craig@chatspike.net>
*
* Written by Craig Edwards, Craig McLure, and others.
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
using namespace std;
#include <stdio.h>
#include <string>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"
#include "helperfuncs.h"
#include "m_sql.h"
/* $ModDesc: Allow/Deny connections based upon an arbitary SQL table */
Server *Srv;
class ModuleSQLAuth : public Module
{
ConfigReader* Conf;
std::string usertable;
std::string userfield;
std::string passfield;
std::string encryption;
std::string killreason;
std::string allowpattern;
bool WallOperFail;
unsigned long dbid;
Module* SQLModule;
public:
bool ReadConfig()
{
Conf = new ConfigReader();
usertable = Conf->ReadValue("sqlauth","usertable",0); // user table name
dbid = Conf->ReadInteger("sqlauth","dbid",0,true); // database id of a database configured in m_sql (see m_sql config)
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)
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.
WallOperFail = Conf->ReadFlag("sqlauth","verbose",0); // set to 1 if failed connects should be reported to operators
allowpattern = Conf->ReadValue("sqlauth","allowpattern",0); // allow nicks matching the pattern without requiring auth
delete Conf;
SQLModule = Srv->FindModule("m_sql.so");
if (!SQLModule)
Srv->Log(DEFAULT,"WARNING: m_sqlauth.so could not initialize because m_sql.so is not loaded. Load the module and rehash your server.");
return (SQLModule);
}
ModuleSQLAuth()
{
Srv = new Server;
ReadConfig();
}
virtual void OnRehash()
{
ReadConfig();
}
virtual void OnUserRegister(userrec* user)
{
if ((allowpattern != "") && (Srv->MatchText(user->nick,allowpattern)))
return;
if (!CheckCredentials(user->nick,user->password))
{
if (WallOperFail)
WriteOpers("Forbidden connection from %s!%s@%s (invalid login/password)",user->nick,user->ident,user->host);
Srv->QuitUser(user,killreason);
}
}
bool CheckCredentials(std::string username, std::string password)
{
bool found = false;
// is the sql module loaded? If not, we don't attempt to do anything.
if (!SQLModule)
return false;
// sanitize the password (we dont want any mysql insertion exploits!)
std::string temp = "";
for (int q = 0; q < password.length(); q++)
{
if (password[q] == '\'')
{
temp = temp + "\'";
}
else if (password[q] == '"')
{
temp = temp + "\\\"";
}
else temp = temp + password[q];
}
password = temp;
// Create a request containing the SQL query and send it to m_sql.so
SQLRequest* query = new SQLRequest(SQL_RESULT,dbid,"SELECT * FROM "+usertable+" WHERE "+userfield+"='"+username+"' AND "+passfield+"="+encryption+"('"+password+"')");
Request queryrequest((char*)query, this, SQLModule);
SQLResult* result = (SQLResult*)queryrequest.Send();
// Did we get "OK" as a result?
if (result->GetType() == SQL_OK)
{
// if we did, this means we may now request a row... there should be only one row for each user, so,
// we don't need to loop to fetch multiple rows.
SQLRequest* rowrequest = new SQLRequest(SQL_ROW,dbid,"");
Request rowquery((char*)rowrequest, this, SQLModule);
SQLResult* rowresult = (SQLResult*)rowquery.Send();
// did we get a row? If we did, we can now do something with the fields
if (rowresult->GetType() == SQL_ROW)
{
if (rowresult->GetField(userfield) == username)
{
// because the query directly asked for the password hash, we do not need to check it -
// if it didnt match it wont be returned in the first place from the SELECT.
// This just checks we didnt get an empty row by accident.
found = true;
}
delete rowresult;
}
else
{
// we didn't have a row.
found = false;
}
delete rowrequest;
delete result;
}
else
{
// the query was bad
found = false;
}
query->SetQueryType(SQL_DONE);
query->SetConnID(dbid);
Request donerequest((char*)query, this, SQLModule);
donerequest.Send();
delete query;
return found;
}
virtual ~ModuleSQLAuth()
{
delete Srv;
}
virtual Version GetVersion()
{
return Version(1,0,0,1,VF_VENDOR);
}
};
class ModuleSQLAuthFactory : public ModuleFactory
{
public:
ModuleSQLAuthFactory()
{
}
~ModuleSQLAuthFactory()
{
}
virtual Module * CreateModule()
{
return new ModuleSQLAuth;
}
};
extern "C" void * init_module( void )
{
return new ModuleSQLAuthFactory;
}
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