<?php
/* Copyright (C) 2008-2011 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2008-2017 Regis Houssin        <regis.houssin@capnetworks.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * or see http://www.gnu.org/
 */

/**
 *  \file		htdocs/core/lib/security.lib.php
 *  \ingroup    core
 *  \brief		Set of function used for dolibarr security (common function included into filefunc.inc.php)
 *  			Warning, this file must not depends on other library files, except function.lib.php
 *  			because it is used at low code level.
 */


/**
 *	Encode a string with base 64 algorithm + specific delta change.
 *
 *	@param   string		$chain		string to encode
 *	@param   string		$key		rule to use for delta ('0', '1' or 'myownkey')
 *	@return  string					encoded string
 *  @see dol_decode
 */
function dol_encode($chain, $key='1')
{
	if (is_numeric($key) && $key == '1')	// rule 1 is offset of 17 for char
	{
		$output_tab=array();
		$strlength=dol_strlen($chain);
		for ($i=0; $i < $strlength; $i++)
		{
			$output_tab[$i] = chr(ord(substr($chain,$i,1))+17);
		}
		$chain = implode("",$output_tab);
	}
	elseif ($key)
	{
		$result='';
		$strlength=dol_strlen($chain);
		for ($i=0; $i < $strlength; $i++)
		{
			$keychar = substr($key, ($i % strlen($key))-1, 1);
			$result.= chr(ord(substr($chain,$i,1))+(ord($keychar)-65));
		}
		$chain=$result;
	}

	return base64_encode($chain);
}

/**
 *	Decode a base 64 encoded + specific delta change.
 *  This function is called by filefunc.inc.php at each page call.
 *
 *	@param   string		$chain		string to decode
 *	@param   string		$key		rule to use for delta ('0', '1' or 'myownkey')
 *	@return  string					decoded string
 *  @see dol_encode
 */
function dol_decode($chain, $key='1')
{
	$chain = base64_decode($chain);

	if (is_numeric($key) && $key == '1')	// rule 1 is offset of 17 for char
	{
		$output_tab=array();
		$strlength=dol_strlen($chain);
		for ($i=0; $i < $strlength;$i++)
		{
			$output_tab[$i] = chr(ord(substr($chain,$i,1))-17);
		}

		$chain = implode("",$output_tab);
	}
	elseif ($key)
	{
		$result='';
		$strlength=dol_strlen($chain);
		for ($i=0; $i < $strlength; $i++)
		{
			$keychar = substr($key, ($i % strlen($key))-1, 1);
			$result.= chr(ord(substr($chain, $i, 1))-(ord($keychar)-65));
		}
		$chain=$result;
	}

	return $chain;
}


/**
 * 	Returns a hash of a string.
 *  If constant MAIN_SECURITY_HASH_ALGO is defined, we use this function as hashing function (recommanded value is 'password_hash')
 *  If constant MAIN_SECURITY_SALT is defined, we use it as a salt (used only if hashing algorightm is something else than 'password_hash').
 *
 * 	@param 		string		$chain		String to hash
 * 	@param		string		$type		Type of hash ('0':auto will use MAIN_SECURITY_HASH_ALGO else md5, '1':sha1, '2':sha1+md5, '3':md5, '4':md5 for OpenLdap, '5':sha256). Use '3' here, if hash is not needed for security purpose, for security need, prefer '0'.
 * 	@return		string					Hash of string
 *  @getRandomPassword
 */
function dol_hash($chain, $type='0')
{
	global $conf;

	// No need to add salt for password_hash
	if (($type == '0' || $type == 'auto') && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash' && function_exists('password_hash'))
	{
		return password_hash($chain, PASSWORD_DEFAULT);
	}

	// Salt value
	if (! empty($conf->global->MAIN_SECURITY_SALT)) $chain=$conf->global->MAIN_SECURITY_SALT.$chain;

	if ($type == '1' || $type == 'sha1') return sha1($chain);
	else if ($type == '2' || $type == 'sha1md5') return sha1(md5($chain));
	else if ($type == '3' || $type == 'md5') return md5($chain);
	else if ($type == '4' || $type == 'md5openldap') return '{md5}'.base64_encode(mhash(MHASH_MD5,$chain)); // For OpenLdap with md5 (based on an unencrypted password in base)
	else if ($type == '5') return hash('sha256',$chain);
	else if (! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'sha1') return sha1($chain);
	else if (! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'sha1md5') return sha1(md5($chain));

	// No particular encoding defined, use default
	return md5($chain);
}

/**
 * 	Compute a hash and compare it to the given one
 *  For backward compatibility reasons, if the hash is not in the password_hash format, we will try to match against md5 and sha1md5
 *  If constant MAIN_SECURITY_HASH_ALGO is defined, we use this function as hashing function.
 *  If constant MAIN_SECURITY_SALT is defined, we use it as a salt.
 *
 * 	@param 		string		$chain		String to hash
 * 	@param 		string		$hash		hash to compare
 * 	@param		string		$type		Type of hash ('0':auto, '1':sha1, '2':sha1+md5, '3':md5, '4':md5 for OpenLdap, '5':sha256). Use '3' here, if hash is not needed for security purpose, for security need, prefer '0'.
 * 	@return		bool					True if the computed hash is the same as the given one
 */
function dol_verifyHash($chain, $hash, $type='0')
{
	global $conf;

	if ($type == '0' && ! empty($conf->global->MAIN_SECURITY_HASH_ALGO) && $conf->global->MAIN_SECURITY_HASH_ALGO == 'password_hash' && function_exists('password_verify')) {
		if ($hash[0] == '$') return password_verify($chain, $hash);
		else if(strlen($hash) == 32) return dol_verifyHash($chain, $hash, '3'); // md5
		else if(strlen($hash) == 40) return dol_verifyHash($chain, $hash, '2'); // sha1md5

		return false;
	}

	return dol_hash($chain, $type) == $hash;
}


/**
 *	Check permissions of a user to show a page and an object. Check read permission.
 * 	If GETPOST('action','aZ09') defined, we also check write and delete permission.
 *
 *	@param	User	$user      	  	User to check
 *	@param  string	$features	    Features to check (it must be module name. Examples: 'societe', 'contact', 'produit&service', 'produit|service', ...)
 *	@param  int		$objectid      	Object ID if we want to check a particular record (optional) is linked to a owned thirdparty (optional).
 *	@param  string	$tableandshare  'TableName&SharedElement' with Tablename is table where object is stored. SharedElement is an optional key to define where to check entity for multicompany modume. Param not used if objectid is null (optional).
 *	@param  string	$feature2		Feature to check, second level of permission (optional). Can be a 'or' check with 'level1|level2'.
 *  @param  string	$dbt_keyfield   Field name for socid foreign key if not fk_soc. Not used if objectid is null (optional)
 *  @param  string	$dbt_select     Field name for select if not rowid. Not used if objectid is null (optional)
 *  @param	Canvas	$objcanvas		Object canvas
 *  @param	int		$isdraft		1=The object with id=$objectid is a draft
 * 	@return	int						Always 1, die process if not allowed
 *  @see dol_check_secure_access_document()
 */
function restrictedArea($user, $features, $objectid=0, $tableandshare='', $feature2='', $dbt_keyfield='fk_soc', $dbt_select='rowid', $objcanvas=null, $isdraft=0)
{
	global $db, $conf;
	global $hookmanager;

	//dol_syslog("functions.lib:restrictedArea $feature, $objectid, $dbtablename,$feature2,$dbt_socfield,$dbt_select");
	//print "user_id=".$user->id.", features=".$features.", feature2=".$feature2.", objectid=".$objectid;
	//print ", dbtablename=".$dbtablename.", dbt_socfield=".$dbt_keyfield.", dbt_select=".$dbt_select;
	//print ", perm: ".$features."->".$feature2."=".($user->rights->$features->$feature2->lire)."<br>";

	// Get more permissions checks from hooks
	$parameters=array('features'=>$features, 'objectid'=>$objectid, 'idtype'=>$dbt_select);
	$reshook=$hookmanager->executeHooks('restrictedArea',$parameters);
	if (! empty($hookmanager->resArray['result'])) return true;
	if ($reshook > 0) return false;

	if ($dbt_select != 'rowid' && $dbt_select != 'id') $objectid = "'".$objectid."'";

	// Features/modules to check
	$featuresarray = array($features);
	if (preg_match('/&/', $features)) $featuresarray = explode("&", $features);
	else if (preg_match('/\|/', $features)) $featuresarray = explode("|", $features);

	// More subfeatures to check
	if (! empty($feature2)) $feature2 = explode("|", $feature2);

	// More parameters
	$params = explode('&', $tableandshare);
	$dbtablename=(! empty($params[0]) ? $params[0] : '');
	$sharedelement=(! empty($params[1]) ? $params[1] : $dbtablename);

	$listofmodules=explode(',',$conf->global->MAIN_MODULES_FOR_EXTERNAL);

	// Check read permission from module
	$readok=1; $nbko=0;
	foreach ($featuresarray as $feature)	// first we check nb of test ko
	{
		$featureforlistofmodule=$feature;
		if ($featureforlistofmodule == 'produit') $featureforlistofmodule='product';
		if (! empty($user->societe_id) && ! empty($conf->global->MAIN_MODULES_FOR_EXTERNAL) && ! in_array($featureforlistofmodule,$listofmodules))	// If limits on modules for external users, module must be into list of modules for external users
		{
			$readok=0; $nbko++;
			continue;
		}

		if ($feature == 'societe')
		{
			if (! $user->rights->societe->lire && ! $user->rights->fournisseur->lire) { $readok=0; $nbko++; }
		}
		else if ($feature == 'contact')
		{
			if (! $user->rights->societe->contact->lire) { $readok=0; $nbko++; }
		}
		else if ($feature == 'produit|service')
		{
			if (! $user->rights->produit->lire && ! $user->rights->service->lire) { $readok=0; $nbko++; }
		}
		else if ($feature == 'prelevement')
		{
			if (! $user->rights->prelevement->bons->lire) { $readok=0; $nbko++; }
		}
		else if ($feature == 'cheque')
		{
			if (! $user->rights->banque->cheque) { $readok=0; $nbko++; }
		}
		else if ($feature == 'projet')
		{
			if (! $user->rights->projet->lire && ! $user->rights->projet->all->lire) { $readok=0; $nbko++; }
		}
		else if (! empty($feature2))	// This should be used for future changes
		{
			$tmpreadok=1;
			foreach($feature2 as $subfeature)
			{
				if (! empty($subfeature) && empty($user->rights->$feature->$subfeature->lire) && empty($user->rights->$feature->$subfeature->read)) { $tmpreadok=0; }
				else if (empty($subfeature) && empty($user->rights->$feature->lire) && empty($user->rights->$feature->read)) { $tmpreadok=0; }
				else { $tmpreadok=1; break; } // Break is to bypass second test if the first is ok
			}
			if (! $tmpreadok)	// We found a test on feature that is ko
			{
				$readok=0;	// All tests are ko (we manage here the and, the or will be managed later using $nbko).
				$nbko++;
			}
		}
		else if (! empty($feature) && ($feature!='user' && $feature!='usergroup'))		// This is for old permissions
		{
			if (empty($user->rights->$feature->lire)
				&& empty($user->rights->$feature->read)
				&& empty($user->rights->$feature->run)) { $readok=0; $nbko++; }
		}
	}

	// If a or and at least one ok
	if (preg_match('/\|/', $features) && $nbko < count($featuresarray)) $readok=1;

	if (! $readok) accessforbidden();
	//print "Read access is ok";

	// Check write permission from module (we need to know write permission to create but also to delete drafts record)
	$createok=1; $nbko=0;
	if (GETPOST('action','aZ09')  == 'create' || ((GETPOST("action","aZ09")  == 'confirm_delete' && GETPOST("confirm","aZ09") == 'yes') || GETPOST("action","aZ09")  == 'delete'))
	{
		foreach ($featuresarray as $feature)
		{
			if ($feature == 'contact')
			{
				if (! $user->rights->societe->contact->creer) { $createok=0; $nbko++; }
			}
			else if ($feature == 'produit|service')
			{
				if (! $user->rights->produit->creer && ! $user->rights->service->creer) { $createok=0; $nbko++; }
			}
			else if ($feature == 'prelevement')
			{
				if (! $user->rights->prelevement->bons->creer) { $createok=0; $nbko++; }
			}
			else if ($feature == 'commande_fournisseur')
			{
				if (! $user->rights->fournisseur->commande->creer) { $createok=0; $nbko++; }
			}
			else if ($feature == 'banque')
			{
				if (! $user->rights->banque->modifier) { $createok=0; $nbko++; }
			}
			else if ($feature == 'cheque')
			{
				if (! $user->rights->banque->cheque) { $createok=0; $nbko++; }
			}
			else if (! empty($feature2))	// This should be used
			{
				foreach($feature2 as $subfeature)
				{
					if (empty($user->rights->$feature->$subfeature->creer)
						&& empty($user->rights->$feature->$subfeature->write)
						&& empty($user->rights->$feature->$subfeature->create)) { $createok=0; $nbko++; }
						else { $createok=1; break; } // Break to bypass second test if the first is ok
				}
			}
			else if (! empty($feature))		// This is for old permissions ('creer' or 'write')
			{
				//print '<br>feature='.$feature.' creer='.$user->rights->$feature->creer.' write='.$user->rights->$feature->write;
				if (empty($user->rights->$feature->creer)
					&& empty($user->rights->$feature->write)
					&& empty($user->rights->$feature->create)) { $createok=0; $nbko++; }
			}
		}

		// If a or and at least one ok
		if (preg_match('/\|/', $features) && $nbko < count($featuresarray)) $createok=1;

		if (GETPOST('action','aZ09') == 'create' && ! $createok) accessforbidden();
		//print "Write access is ok";
	}

	// Check create user permission
	$createuserok=1;
	if (GETPOST('action','aZ09') == 'confirm_create_user' && GETPOST("confirm",'aZ09') == 'yes')
	{
		if (! $user->rights->user->user->creer) $createuserok=0;

		if (! $createuserok) accessforbidden();
		//print "Create user access is ok";
	}

	// Check delete permission from module
	$deleteok=1; $nbko=0;
	if ((GETPOST("action","aZ09")  == 'confirm_delete' && GETPOST("confirm","aZ09") == 'yes') || GETPOST("action","aZ09")  == 'delete')
	{
		foreach ($featuresarray as $feature)
		{
			if ($feature == 'contact')
			{
				if (! $user->rights->societe->contact->supprimer) $deleteok=0;
			}
			else if ($feature == 'produit|service')
			{
				if (! $user->rights->produit->supprimer && ! $user->rights->service->supprimer) $deleteok=0;
			}
			else if ($feature == 'commande_fournisseur')
			{
				if (! $user->rights->fournisseur->commande->supprimer) $deleteok=0;
			}
			else if ($feature == 'banque')
			{
				if (! $user->rights->banque->modifier) $deleteok=0;
			}
			else if ($feature == 'cheque')
			{
				if (! $user->rights->banque->cheque) $deleteok=0;
			}
			else if ($feature == 'ecm')
			{
				if (! $user->rights->ecm->upload) $deleteok=0;
			}
			else if ($feature == 'ftp')
			{
				if (! $user->rights->ftp->write) $deleteok=0;
			}else if ($feature == 'salaries')
			{
				if (! $user->rights->salaries->delete) $deleteok=0;
			}
			else if ($feature == 'salaries')
			{
				if (! $user->rights->salaries->delete) $deleteok=0;
			}
			else if (! empty($feature2))	// This should be used for permissions on 2 levels
			{
				foreach($feature2 as $subfeature)
				{
					if (empty($user->rights->$feature->$subfeature->supprimer) && empty($user->rights->$feature->$subfeature->delete)) $deleteok=0;
					else { $deleteok=1; break; } // For bypass the second test if the first is ok
				}
			}
			else if (! empty($feature))		// This is used for permissions on 1 level
			{
				//print '<br>feature='.$feature.' creer='.$user->rights->$feature->supprimer.' write='.$user->rights->$feature->delete;
				if (empty($user->rights->$feature->supprimer)
					&& empty($user->rights->$feature->delete)
					&& empty($user->rights->$feature->run)) $deleteok=0;
			}
		}

		// If a or and at least one ok
		if (preg_match('/\|/', $features) && $nbko < count($featuresarray)) $deleteok=1;

		if (! $deleteok && ! ($isdraft && $createok)) accessforbidden();
		//print "Delete access is ok";
	}

	// If we have a particular object to check permissions on, we check this object
	// is linked to a company allowed to $user.
	if (! empty($objectid) && $objectid > 0)
	{
		$ok = checkUserAccessToObject($user, $featuresarray, $objectid, $tableandshare, $feature2, $dbt_keyfield, $dbt_select);
		return $ok ? 1 : accessforbidden();
	}

	return 1;
}

/**
 * Check access by user to object.
 * This function is also called by restrictedArea
 *
 * @param User			$user			User to check
 * @param array			$featuresarray	Features/modules to check. Example: ('user','service','member','project','task',...)
 * @param int|string	$objectid		Object ID if we want to check a particular record (optional) is linked to a owned thirdparty (optional).
 * @param string		$tableandshare	'TableName&SharedElement' with Tablename is table where object is stored. SharedElement is an optional key to define where to check entity for multicompany modume. Param not used if objectid is null (optional).
 * @param string		$feature2		Feature to check, second level of permission (optional). Can be or check with 'level1|level2'.
 * @param string		$dbt_keyfield	Field name for socid foreign key if not fk_soc. Not used if objectid is null (optional)
 * @param string		$dbt_select		Field name for select if not rowid. Not used if objectid is null (optional)
 * @return	bool						True if user has access, False otherwise
 * @see restrictedArea()
 */
function checkUserAccessToObject($user, $featuresarray, $objectid=0, $tableandshare='', $feature2='', $dbt_keyfield='', $dbt_select='rowid')
{
	global $db, $conf;

	// More parameters
	$params = explode('&', $tableandshare);
	$dbtablename=(! empty($params[0]) ? $params[0] : '');
	$sharedelement=(! empty($params[1]) ? $params[1] : $dbtablename);

	foreach ($featuresarray as $feature)
	{
		$sql='';

		// For backward compatibility
		if ($feature == 'member')  $feature='adherent';
		if ($feature == 'project') $feature='projet';
		if ($feature == 'task')    $feature='projet_task';

		$check = array('adherent','banque','don','user','usergroup','product','produit','service','produit|service','categorie','resource','expensereport'); // Test on entity only (Objects with no link to company)
		$checksoc = array('societe');	 // Test for societe object
		$checkother = array('contact','agenda');	 // Test on entity and link to third party. Allowed if link is empty (Ex: contacts...).
		$checkproject = array('projet','project'); // Test for project object
		$checktask = array('projet_task');
		$nocheck = array('barcode','stock');	// No test
		//$checkdefault = 'all other not already defined'; // Test on entity and link to third party. Not allowed if link is empty (Ex: invoice, orders...).

		// If dbtablename not defined, we use same name for table than module name
		if (empty($dbtablename))
		{
			$dbtablename = $feature;
			$sharedelement = (! empty($params[1]) ? $params[1] : $dbtablename);		// We change dbtablename, so we set sharedelement too.
		}

		// Check permission for object with entity
		if (in_array($feature,$check))
		{
			$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
			$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
			if (($feature == 'user' || $feature == 'usergroup') && ! empty($conf->multicompany->enabled))
			{
				if (! empty($conf->global->MULTICOMPANY_TRANSVERSE_MODE))
				{
					if ($conf->entity == 1 && $user->admin && ! $user->entity)
					{
						$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
						$sql.= " AND dbt.entity IS NOT NULL";
					}
					else
					{
						$sql.= ",".MAIN_DB_PREFIX."usergroup_user as ug";
						$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
						$sql.= " AND ((ug.fk_user = dbt.rowid";
						$sql.= " AND ug.entity IN (".getEntity('usergroup')."))";
						$sql.= " OR dbt.entity = 0)"; // Show always superadmin
					}
				}
				else {
					$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
					$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
				}
			}
			else
			{
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
		}
		else if (in_array($feature,$checksoc))	// We check feature = checksoc
		{
			// If external user: Check permission for external users
			if ($user->socid > 0)
			{
				if ($user->socid <> $objectid) return false;
			}
			// If internal user: Check permission for internal users that are restricted on their objects
			else if (! empty($conf->societe->enabled) && ($user->rights->societe->lire && ! $user->rights->societe->client->voir))
			{
				$sql = "SELECT COUNT(sc.fk_soc) as nb";
				$sql.= " FROM (".MAIN_DB_PREFIX."societe_commerciaux as sc";
				$sql.= ", ".MAIN_DB_PREFIX."societe as s)";
				$sql.= " WHERE sc.fk_soc IN (".$objectid.")";
				$sql.= " AND sc.fk_user = ".$user->id;
				$sql.= " AND sc.fk_soc = s.rowid";
				$sql.= " AND s.entity IN (".getEntity($sharedelement, 1).")";
			}
			// If multicompany and internal users with all permissions, check user is in correct entity
			else if (! empty($conf->multicompany->enabled))
			{
				$sql = "SELECT COUNT(s.rowid) as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX."societe as s";
				$sql.= " WHERE s.rowid IN (".$objectid.")";
				$sql.= " AND s.entity IN (".getEntity($sharedelement, 1).")";
			}
		}
		else if (in_array($feature,$checkother))	// Test on entity and link to societe. Allowed if link is empty (Ex: contacts...).
		{
			// If external user: Check permission for external users
			if ($user->socid > 0)
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.fk_soc = ".$user->socid;
			}
			// If internal user: Check permission for internal users that are restricted on their objects
			else if (! empty($conf->societe->enabled) && ($user->rights->societe->lire && ! $user->rights->societe->client->voir))
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " LEFT JOIN ".MAIN_DB_PREFIX."societe_commerciaux as sc ON dbt.fk_soc = sc.fk_soc AND sc.fk_user = '".$user->id."'";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND (dbt.fk_soc IS NULL OR sc.fk_soc IS NOT NULL)";	// Contact not linked to a company or to a company of user
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
			// If multicompany and internal users with all permissions, check user is in correct entity
			else if (! empty($conf->multicompany->enabled))
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
		}
		else if (in_array($feature,$checkproject))
		{
			if (! empty($conf->projet->enabled) && empty($user->rights->projet->all->lire))
			{
				include_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
				$projectstatic=new Project($db);
				$tmps=$projectstatic->getProjectsAuthorizedForUser($user,0,1,0);
				$tmparray=explode(',',$tmps);
				if (! in_array($objectid,$tmparray)) return false;
			}
			else
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
		}
		else if (in_array($feature,$checktask))
		{
			if (! empty($conf->projet->enabled) && empty($user->rights->projet->all->lire))
			{
				$task = new Task($db);
				$task->fetch($objectid);

				include_once DOL_DOCUMENT_ROOT.'/projet/class/project.class.php';
				$projectstatic=new Project($db);
				$tmps=$projectstatic->getProjectsAuthorizedForUser($user,0,1,0);
				$tmparray=explode(',',$tmps);
				if (! in_array($task->fk_project,$tmparray)) return false;
			}
			else
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
		}
		else if (! in_array($feature,$nocheck))		// By default (case of $checkdefault), we check on object entity + link to third party on field $dbt_keyfield
		{
			// If external user: Check permission for external users
			if ($user->socid > 0)
			{
				if (empty($dbt_keyfield)) dol_print_error('','Param dbt_keyfield is required but not defined');
				$sql = "SELECT COUNT(dbt.".$dbt_keyfield.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.rowid IN (".$objectid.")";
				$sql.= " AND dbt.".$dbt_keyfield." = ".$user->socid;
			}
			// If internal user: Check permission for internal users that are restricted on their objects
			else if (! empty($conf->societe->enabled) && ($user->rights->societe->lire && ! $user->rights->societe->client->voir))
			{
				if (empty($dbt_keyfield)) dol_print_error('','Param dbt_keyfield is required but not defined');
				$sql = "SELECT COUNT(sc.fk_soc) as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= ", ".MAIN_DB_PREFIX."societe as s";
				$sql.= ", ".MAIN_DB_PREFIX."societe_commerciaux as sc";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND sc.fk_soc = dbt.".$dbt_keyfield;
				$sql.= " AND dbt.".$dbt_keyfield." = s.rowid";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
				$sql.= " AND sc.fk_user = ".$user->id;
			}
			// If multicompany and internal users with all permissions, check user is in correct entity
			else if (! empty($conf->multicompany->enabled))
			{
				$sql = "SELECT COUNT(dbt.".$dbt_select.") as nb";
				$sql.= " FROM ".MAIN_DB_PREFIX.$dbtablename." as dbt";
				$sql.= " WHERE dbt.".$dbt_select." IN (".$objectid.")";
				$sql.= " AND dbt.entity IN (".getEntity($sharedelement, 1).")";
			}
		}

		if ($sql)
		{
			$resql=$db->query($sql);
			if ($resql)
			{
				$obj = $db->fetch_object($resql);
				if (! $obj || $obj->nb < count(explode(',', $objectid))) return false;
			}
			else
			{
				return false;
			}
		}
	}
	return true;
}

/**
 *	Show a message to say access is forbidden and stop program
 *	Calling this function terminate execution of PHP.
 *
 *	@param	string	$message			    Force error message
 *	@param	int		$printheader		    Show header before
 *  @param  int		$printfooter         Show footer after
 *  @param  int		$showonlymessage     Show only message parameter. Otherwise add more information.
 *  @return	void
 */
function accessforbidden($message='',$printheader=1,$printfooter=1,$showonlymessage=0)
{
	global $conf, $db, $user, $langs;
	if (! is_object($langs))
	{
		include_once DOL_DOCUMENT_ROOT.'/core/class/translate.class.php';
		$langs=new Translate('',$conf);
	}

	$langs->load("errors");

	if ($printheader)
	{
		if (function_exists("llxHeader")) llxHeader('');
		else if (function_exists("llxHeaderVierge")) llxHeaderVierge('');
	}
	print '<div class="error">';
	if (! $message) print $langs->trans("ErrorForbidden");
	else print $message;
	print '</div>';
	print '<br>';
	if (empty($showonlymessage))
	{
		if ($user->login)
		{
			print $langs->trans("CurrentLogin").': <font class="error">'.$user->login.'</font><br>';
			print $langs->trans("ErrorForbidden2",$langs->trans("Home"),$langs->trans("Users"));
		}
		else
		{
			print $langs->trans("ErrorForbidden3");
		}
	}
	if ($printfooter && function_exists("llxFooter")) llxFooter();
	exit(0);
}
