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piwigo_ynh/sources/include/functions_user.inc.php

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initial commit
2014-07-06 13:21:10 +02:00
<?php
// +-----------------------------------------------------------------------+
// | Piwigo - a PHP based photo gallery |
// +-----------------------------------------------------------------------+
// | Copyright(C) 2008-2014 Piwigo Team http://piwigo.org |
// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
// +-----------------------------------------------------------------------+
// | 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 |
// | |
// | 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, write to the Free Software |
// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
// | USA. |
// +-----------------------------------------------------------------------+
/**
* @package functions\user
*/
/**
* Checks if an email is well formed and not already in use.
*
* @param int $user_id
* @param string $mail_address
* @return string|void error message or nothing
*/
function validate_mail_address($user_id, $mail_address)
{
global $conf;
if (empty($mail_address) and
!($conf['obligatory_user_mail_address'] and
in_array(script_basename(), array('register', 'profile'))))
{
return '';
}
if ( !email_check_format($mail_address) )
{
return l10n('mail address must be like xxx@yyy.eee (example : jack@altern.org)');
}
if (defined("PHPWG_INSTALLED") and !empty($mail_address))
{
$query = '
SELECT count(*)
FROM '.USERS_TABLE.'
WHERE upper('.$conf['user_fields']['email'].') = upper(\''.$mail_address.'\')
'.(is_numeric($user_id) ? 'AND '.$conf['user_fields']['id'].' != \''.$user_id.'\'' : '').'
;';
list($count) = pwg_db_fetch_row(pwg_query($query));
if ($count != 0)
{
return l10n('this email address is already in use');
}
}
}
/**
* Checks if a login is not already in use.
* Comparision is case insensitive.
*
* @param string $login
* @return string|void error message or nothing
*/
function validate_login_case($login)
{
global $conf;
if (defined("PHPWG_INSTALLED"))
{
$query = "
SELECT ".$conf['user_fields']['username']."
FROM ".USERS_TABLE."
WHERE LOWER(".stripslashes($conf['user_fields']['username']).") = '".strtolower($login)."'
;";
$count = pwg_db_num_rows(pwg_query($query));
if ($count > 0)
{
return l10n('this login is already used');
}
}
}
/**
* Searches for user with the same username in different case.
*
* @param string $username typically typed in by user for identification
* @return string $username found in database
*/
function search_case_username($username)
{
global $conf;
$username_lo = strtolower($username);
$SCU_users = array();
$q = pwg_query("
SELECT ".$conf['user_fields']['username']." AS username
FROM `".USERS_TABLE."`;
");
while ($r = pwg_db_fetch_assoc($q))
$SCU_users[$r['username']] = strtolower($r['username']);
// $SCU_users is now an associative table where the key is the account as
// registered in the DB, and the value is this same account, in lower case
$users_found = array_keys($SCU_users, $username_lo);
// $users_found is now a table of which the values are all the accounts
// which can be written in lowercase the same way as $username
if (count($users_found) != 1) // If ambiguous, don't allow lowercase writing
return $username; // but normal writing will work
else
return $users_found[0];
}
/**
* Creates a new user.
*
* @param string $login
* @param string $password
* @param string $mail_adress
* @param bool $notify_admin
* @param array &$errors populated with error messages
* @param bool $notify_user
* @return int|false user id or false
*/
function register_user($login, $password, $mail_address, $notify_admin=true, &$errors = array(), $notify_user=false)
{
global $conf;
if ($login == '')
{
$errors[] = l10n('Please, enter a login');
}
if (preg_match('/^.* $/', $login))
{
$errors[] = l10n('login mustn\'t end with a space character');
}
if (preg_match('/^ .*$/', $login))
{
$errors[] = l10n('login mustn\'t start with a space character');
}
if (get_userid($login))
{
$errors[] = l10n('this login is already used');
}
if ($login != strip_tags($login))
{
$errors[] = l10n('html tags are not allowed in login');
}
$mail_error = validate_mail_address(null, $mail_address);
if ('' != $mail_error)
{
$errors[] = $mail_error;
}
if ($conf['insensitive_case_logon'] == true)
{
$login_error = validate_login_case($login);
if ($login_error != '')
{
$errors[] = $login_error;
}
}
$errors = trigger_event(
'register_user_check',
$errors,
array(
'username'=>$login,
'password'=>$password,
'email'=>$mail_address,
)
);
// if no error until here, registration of the user
if (count($errors) == 0)
{
$insert = array(
$conf['user_fields']['username'] => pwg_db_real_escape_string($login),
$conf['user_fields']['password'] => $conf['password_hash']($password),
$conf['user_fields']['email'] => $mail_address
);
single_insert(USERS_TABLE, $insert);
$user_id = pwg_db_insert_id();
// Assign by default groups
$query = '
SELECT id
FROM '.GROUPS_TABLE.'
WHERE is_default = \''.boolean_to_string(true).'\'
ORDER BY id ASC
;';
$result = pwg_query($query);
$inserts = array();
while ($row = pwg_db_fetch_assoc($result))
{
$inserts[] = array(
'user_id' => $user_id,
'group_id' => $row['id']
);
}
if (count($inserts) != 0)
{
mass_inserts(USER_GROUP_TABLE, array('user_id', 'group_id'), $inserts);
}
$override = null;
if ($notify_admin and $conf['browser_language'])
{
if (!get_browser_language($override['language']))
{
$override=null;
}
}
create_user_infos($user_id, $override);
if ($notify_admin and $conf['email_admin_on_new_user'])
{
include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');
$admin_url = get_absolute_root_url().'admin.php?page=user_list&username='.$login;
$keyargs_content = array(
get_l10n_args('User: %s', stripslashes($login) ),
get_l10n_args('Email: %s', $_POST['mail_address']),
get_l10n_args(''),
get_l10n_args('Admin: %s', $admin_url),
);
pwg_mail_notification_admins(
get_l10n_args('Registration of %s', stripslashes($login) ),
$keyargs_content
);
}
if ($notify_user and email_check_format($mail_address))
{
include_once(PHPWG_ROOT_PATH.'include/functions_mail.inc.php');
$keyargs_content = array(
get_l10n_args('Hello %s,', stripslashes($login)),
get_l10n_args('Thank you for registering at %s!', $conf['gallery_title']),
get_l10n_args('', ''),
get_l10n_args('Here are your connection settings', ''),
get_l10n_args('Username: %s', stripslashes($login)),
get_l10n_args('Password: %s', stripslashes($password)),
get_l10n_args('Email: %s', $mail_address),
get_l10n_args('', ''),
get_l10n_args('If you think you\'ve received this email in error, please contact us at %s', get_webmaster_mail_address()),
);
pwg_mail(
$mail_address,
array(
'subject' => '['.$conf['gallery_title'].'] '.l10n('Registration'),
'content' => l10n_args($keyargs_content),
'content_format' => 'text/plain',
)
);
}
trigger_action(
'register_user',
array(
'id'=>$user_id,
'username'=>$login,
'email'=>$mail_address,
)
);
return $user_id;
}
else
{
return false;
}
}
/**
* Fetches user data from database.
* Same that getuserdata() but with additional tests for guest.
*
* @param int $user_id
* @param boolean $user_cache
* @return array
*/
function build_user($user_id, $use_cache=true)
{
global $conf;
$user['id'] = $user_id;
$user = array_merge( $user, getuserdata($user_id, $use_cache) );
if ($user['id'] == $conf['guest_id'] and $user['status'] <> 'guest')
{
$user['status'] = 'guest';
$user['internal_status']['guest_must_be_guest'] = true;
}
// Check user theme
if (!isset($user['theme_name']))
{
$user['theme'] = get_default_theme();
}
return $user;
}
/**
* Finds informations related to the user identifier.
*
* @param int $user_id
* @param boolean $use_cache
* @return array
*/
function getuserdata($user_id, $use_cache=false)
{
global $conf;
// retrieve basic user data
$query = '
SELECT ';
$is_first = true;
foreach ($conf['user_fields'] as $pwgfield => $dbfield)
{
if ($is_first)
{
$is_first = false;
}
else
{
$query.= '
, ';
}
$query.= $dbfield.' AS '.$pwgfield;
}
$query.= '
FROM '.USERS_TABLE.'
WHERE '.$conf['user_fields']['id'].' = \''.$user_id.'\'';
$row = pwg_db_fetch_assoc(pwg_query($query));
// retrieve additional user data ?
if ($conf['external_authentification'])
{
$query = '
SELECT
COUNT(1) AS counter
FROM '.USER_INFOS_TABLE.' AS ui
LEFT JOIN '.USER_CACHE_TABLE.' AS uc ON ui.user_id = uc.user_id
LEFT JOIN '.THEMES_TABLE.' AS t ON t.id = ui.theme
WHERE ui.user_id = '.$user_id.'
GROUP BY ui.user_id
;';
list($counter) = pwg_db_fetch_row(pwg_query($query));
if ($counter != 1)
{
create_user_infos($user_id);
}
}
// retrieve user info
$query = '
SELECT
ui.*,
uc.*,
t.name AS theme_name
FROM '.USER_INFOS_TABLE.' AS ui
LEFT JOIN '.USER_CACHE_TABLE.' AS uc ON ui.user_id = uc.user_id
LEFT JOIN '.THEMES_TABLE.' AS t ON t.id = ui.theme
WHERE ui.user_id = '.$user_id.'
;';
$result = pwg_query($query);
$user_infos_row = pwg_db_fetch_assoc($result);
// then merge basic + additional user data
$userdata = array_merge($row, $user_infos_row);
foreach ($userdata as &$value)
{
// If the field is true or false, the variable is transformed into a boolean value.
if ($value == 'true')
{
$value = true;
}
elseif ($value == 'false')
{
$value = false;
}
}
unset($value);
if ($use_cache)
{
if (!isset($userdata['need_update'])
or !is_bool($userdata['need_update'])
or $userdata['need_update'] == true)
{
$userdata['cache_update_time'] = time();
// Set need update are done
$userdata['need_update'] = false;
$userdata['forbidden_categories'] =
calculate_permissions($userdata['id'], $userdata['status']);
/* now we build the list of forbidden images (this list does not contain
images that are not in at least an authorized category)*/
$query = '
SELECT DISTINCT(id)
FROM '.IMAGES_TABLE.' INNER JOIN '.IMAGE_CATEGORY_TABLE.' ON id=image_id
WHERE category_id NOT IN ('.$userdata['forbidden_categories'].')
AND level>'.$userdata['level'];
$forbidden_ids = array_from_query($query, 'id');
if ( empty($forbidden_ids) )
{
$forbidden_ids[] = 0;
}
$userdata['image_access_type'] = 'NOT IN'; //TODO maybe later
$userdata['image_access_list'] = implode(',',$forbidden_ids);
$query = '
SELECT COUNT(DISTINCT(image_id)) as total
FROM '.IMAGE_CATEGORY_TABLE.'
WHERE category_id NOT IN ('.$userdata['forbidden_categories'].')
AND image_id '.$userdata['image_access_type'].' ('.$userdata['image_access_list'].')';
list($userdata['nb_total_images']) = pwg_db_fetch_row(pwg_query($query));
// now we update user cache categories
$user_cache_cats = get_computed_categories($userdata, null);
if ( !is_admin($userdata['status']) )
{ // for non admins we forbid categories with no image (feature 1053)
$forbidden_ids = array();
foreach ($user_cache_cats as $cat)
{
if ($cat['count_images']==0)
{
$forbidden_ids[] = $cat['cat_id'];
remove_computed_category($user_cache_cats, $cat);
}
}
if ( !empty($forbidden_ids) )
{
if ( empty($userdata['forbidden_categories']) )
{
$userdata['forbidden_categories'] = implode(',', $forbidden_ids);
}
else
{
$userdata['forbidden_categories'] .= ','.implode(',', $forbidden_ids);
}
}
}
// delete user cache
$query = '
DELETE FROM '.USER_CACHE_CATEGORIES_TABLE.'
WHERE user_id = '.$userdata['id'];
pwg_query($query);
// Due to concurrency issues, we ask MySQL to ignore errors on
// insert. This may happen when cache needs refresh and that Piwigo is
// called "very simultaneously".
mass_inserts(
USER_CACHE_CATEGORIES_TABLE,
array(
'user_id', 'cat_id',
'date_last', 'max_date_last', 'nb_images', 'count_images', 'nb_categories', 'count_categories'
),
$user_cache_cats,
array('ignore' => true)
);
// update user cache
$query = '
DELETE FROM '.USER_CACHE_TABLE.'
WHERE user_id = '.$userdata['id'];
pwg_query($query);
// for the same reason as user_cache_categories, we ignore error on
// this insert
$query = '
INSERT IGNORE INTO '.USER_CACHE_TABLE.'
(user_id, need_update, cache_update_time, forbidden_categories, nb_total_images,
last_photo_date,
image_access_type, image_access_list)
VALUES
('.$userdata['id'].',\''.boolean_to_string($userdata['need_update']).'\','
.$userdata['cache_update_time'].',\''
.$userdata['forbidden_categories'].'\','.$userdata['nb_total_images'].','.
(empty($userdata['last_photo_date']) ? 'NULL': '\''.$userdata['last_photo_date'].'\'').
',\''.$userdata['image_access_type'].'\',\''.$userdata['image_access_list'].'\')';
pwg_query($query);
}
}
return $userdata;
}
/**
* Deletes favorites of the current user if he's not allowed to see them.
*/
function check_user_favorites()
{
global $user;
if ($user['forbidden_categories'] == '')
{
return;
}
// $filter['visible_categories'] and $filter['visible_images']
// must be not used because filter <> restriction
// retrieving images allowed : belonging to at least one authorized
// category
$query = '
SELECT DISTINCT f.image_id
FROM '.FAVORITES_TABLE.' AS f INNER JOIN '.IMAGE_CATEGORY_TABLE.' AS ic
ON f.image_id = ic.image_id
WHERE f.user_id = '.$user['id'].'
'.get_sql_condition_FandF(
array(
'forbidden_categories' => 'ic.category_id',
),
'AND'
).'
;';
$authorizeds = array_from_query($query, 'image_id');
$query = '
SELECT image_id
FROM '.FAVORITES_TABLE.'
WHERE user_id = '.$user['id'].'
;';
$favorites = array_from_query($query, 'image_id');
$to_deletes = array_diff($favorites, $authorizeds);
if (count($to_deletes) > 0)
{
$query = '
DELETE FROM '.FAVORITES_TABLE.'
WHERE image_id IN ('.implode(',', $to_deletes).')
AND user_id = '.$user['id'].'
;';
pwg_query($query);
}
}
/**
* Calculates the list of forbidden categories for a given user.
*
* Calculation is based on private categories minus categories authorized to
* the groups the user belongs to minus the categories directly authorized
* to the user. The list contains at least 0 to be compliant with queries
* such as "WHERE category_id NOT IN ($forbidden_categories)"
*
* @param int $user_id
* @param string $user_status
* @return string comma separated ids
*/
function calculate_permissions($user_id, $user_status)
{
$query = '
SELECT id
FROM '.CATEGORIES_TABLE.'
WHERE status = \'private\'
;';
$private_array = array_from_query($query, 'id');
// retrieve category ids directly authorized to the user
$query = '
SELECT cat_id
FROM '.USER_ACCESS_TABLE.'
WHERE user_id = '.$user_id.'
;';
$authorized_array = array_from_query($query, 'cat_id');
// retrieve category ids authorized to the groups the user belongs to
$query = '
SELECT cat_id
FROM '.USER_GROUP_TABLE.' AS ug INNER JOIN '.GROUP_ACCESS_TABLE.' AS ga
ON ug.group_id = ga.group_id
WHERE ug.user_id = '.$user_id.'
;';
$authorized_array =
array_merge(
$authorized_array,
array_from_query($query, 'cat_id')
);
// uniquify ids : some private categories might be authorized for the
// groups and for the user
$authorized_array = array_unique($authorized_array);
// only unauthorized private categories are forbidden
$forbidden_array = array_diff($private_array, $authorized_array);
// if user is not an admin, locked categories are forbidden
if (!is_admin($user_status))
{
$query = '
SELECT id
FROM '.CATEGORIES_TABLE.'
WHERE visible = \'false\'
;';
$result = pwg_query($query);
while ($row = pwg_db_fetch_assoc($result))
{
$forbidden_array[] = $row['id'];
}
$forbidden_array = array_unique($forbidden_array);
}
if ( empty($forbidden_array) )
{// at least, the list contains 0 value. This category does not exists so
// where clauses such as "WHERE category_id NOT IN(0)" will always be
// true.
$forbidden_array[] = 0;
}
return implode(',', $forbidden_array);
}
/**
* Returns user identifier thanks to his name.
*
* @param string $username
* @param int|false
*/
function get_userid($username)
{
global $conf;
$username = pwg_db_real_escape_string($username);
$query = '
SELECT '.$conf['user_fields']['id'].'
FROM '.USERS_TABLE.'
WHERE '.$conf['user_fields']['username'].' = \''.$username.'\'
;';
$result = pwg_query($query);
if (pwg_db_num_rows($result) == 0)
{
return false;
}
else
{
list($user_id) = pwg_db_fetch_row($result);
return $user_id;
}
}
/**
* Returns user identifier thanks to his email.
*
* @param string $email
* @param int|false
*/
function get_userid_by_email($email)
{
global $conf;
$email = pwg_db_real_escape_string($email);
$query = '
SELECT
'.$conf['user_fields']['id'].'
FROM '.USERS_TABLE.'
WHERE UPPER('.$conf['user_fields']['email'].') = UPPER(\''.$email.'\')
;';
$result = pwg_query($query);
if (pwg_db_num_rows($result) == 0)
{
return false;
}
else
{
list($user_id) = pwg_db_fetch_row($result);
return $user_id;
}
}
/**
* Returns a array with default user valuees.
*
* @param convert_str ceonferts 'true' and 'false' into booleans
* @return array
*/
function get_default_user_info($convert_str=true)
{
global $cache, $conf;
if (!isset($cache['default_user']))
{
$query = '
SELECT *
FROM '.USER_INFOS_TABLE.'
WHERE user_id = '.$conf['default_user_id'].'
;';
$result = pwg_query($query);
if (pwg_db_num_rows($result) > 0)
{
$cache['default_user'] = pwg_db_fetch_assoc($result);
unset($cache['default_user']['user_id']);
unset($cache['default_user']['status']);
unset($cache['default_user']['registration_date']);
}
else
{
$cache['default_user'] = false;
}
}
if (is_array($cache['default_user']) and $convert_str)
{
$default_user = $cache['default_user'];
foreach ($default_user as &$value)
{
// If the field is true or false, the variable is transformed into a boolean value.
if ($value == 'true')
{
$value = true;
}
elseif ($value == 'false')
{
$value = false;
}
}
return $default_user;
}
else
{
return $cache['default_user'];
}
}
/**
* Returns a default user value.
*
* @param string $value_name
* @param mixed $default
* @return mixed
*/
function get_default_user_value($value_name, $default)
{
$default_user = get_default_user_info(true);
if ($default_user === false or empty($default_user[$value_name]))
{
return $default;
}
else
{
return $default_user[$value_name];
}
}
/**
* Returns the default theme.
* If the default theme is not available it returns the first available one.
*
* @return string
*/
function get_default_theme()
{
$theme = get_default_user_value('theme', PHPWG_DEFAULT_TEMPLATE);
if (check_theme_installed($theme))
{
return $theme;
}
// let's find the first available theme
$active_themes = array_keys(get_pwg_themes());
return $active_themes[0];
}
/**
* Returns the default language.
*
* @return string
*/
function get_default_language()
{
return get_default_user_value('language', PHPWG_DEFAULT_LANGUAGE);
}
/**
* Tries to find the browser language among available languages.
* @todo : try to match 'fr_CA' before 'fr'
*
* @param string &$lang
* @return bool
*/
function get_browser_language(&$lang)
{
$browser_language = substr(@$_SERVER["HTTP_ACCEPT_LANGUAGE"], 0, 2);
foreach (get_languages() as $language_code => $language_name)
{
if (substr($language_code, 0, 2) == $browser_language)
{
$lang = $language_code;
return true;
}
}
return false;
}
/**
* Creates user informations based on default values.
*
* @param int|int[] $user_ids
* @param array $override_values values used to override default user values
*/
function create_user_infos($user_ids, $override_values=null)
{
global $conf;
if (!is_array($user_ids))
{
$user_ids = array($user_ids);
}
if (!empty($user_ids))
{
$inserts = array();
list($dbnow) = pwg_db_fetch_row(pwg_query('SELECT NOW();'));
$default_user = get_default_user_info(false);
if ($default_user === false)
{
// Default on structure are used
$default_user = array();
}
if (!is_null($override_values))
{
$default_user = array_merge($default_user, $override_values);
}
foreach ($user_ids as $user_id)
{
$level= isset($default_user['level']) ? $default_user['level'] : 0;
if ($user_id == $conf['webmaster_id'])
{
$status = 'webmaster';
$level = max( $conf['available_permission_levels'] );
}
else if (($user_id == $conf['guest_id']) or
($user_id == $conf['default_user_id']))
{
$status = 'guest';
}
else
{
$status = 'normal';
}
$insert = array_merge(
$default_user,
array(
'user_id' => $user_id,
'status' => $status,
'registration_date' => $dbnow,
'level' => $level
));
$inserts[] = $insert;
}
mass_inserts(USER_INFOS_TABLE, array_keys($inserts[0]), $inserts);
}
}
/**
* Returns the auto login key for an user or false if the user is not found.
*
* @param int $user_id
* @param int $time
* @param string &$username fille with corresponding username
* @return string|false
*/
function calculate_auto_login_key($user_id, $time, &$username)
{
global $conf;
$query = '
SELECT '.$conf['user_fields']['username'].' AS username
, '.$conf['user_fields']['password'].' AS password
FROM '.USERS_TABLE.'
WHERE '.$conf['user_fields']['id'].' = '.$user_id;
$result = pwg_query($query);
if (pwg_db_num_rows($result) > 0)
{
$row = pwg_db_fetch_assoc($result);
$username = stripslashes($row['username']);
$data = $time.$user_id.$username;
$key = base64_encode( hash_hmac('sha1', $data, $conf['secret_key'].$row['password'],true) );
return $key;
}
return false;
}
/**
* Performs all required actions for user login.
*
* @param int $user_id
* @param bool $remember_me
*/
function log_user($user_id, $remember_me)
{
global $conf, $user;
if ($remember_me and $conf['authorize_remembering'])
{
$now = time();
$key = calculate_auto_login_key($user_id, $now, $username);
if ($key!==false)
{
$cookie = $user_id.'-'.$now.'-'.$key;
if (version_compare(PHP_VERSION, '5.2', '>=') )
{
setcookie($conf['remember_me_name'],
$cookie,
time()+$conf['remember_me_length'],
cookie_path(),ini_get('session.cookie_domain'),ini_get('session.cookie_secure'),
ini_get('session.cookie_httponly')
);
}
else
{
setcookie($conf['remember_me_name'],
$cookie,
time()+$conf['remember_me_length'],
cookie_path(),ini_get('session.cookie_domain'),ini_get('session.cookie_secure')
);
}
}
}
else
{ // make sure we clean any remember me ...
setcookie($conf['remember_me_name'], '', 0, cookie_path(),ini_get('session.cookie_domain'));
}
if ( session_id()!="" )
{ // we regenerate the session for security reasons
// see http://www.acros.si/papers/session_fixation.pdf
session_regenerate_id(true);
}
else
{
session_start();
}
$_SESSION['pwg_uid'] = (int)$user_id;
$user['id'] = $_SESSION['pwg_uid'];
trigger_action('user_login', $user['id']);
}
/**
* Performs auto-connection when cookie remember_me exists.
*
* @return bool
*/
function auto_login()
{
global $conf;
if ( isset( $_COOKIE[$conf['remember_me_name']] ) )
{
$cookie = explode('-', stripslashes($_COOKIE[$conf['remember_me_name']]));
if ( count($cookie)===3
and is_numeric(@$cookie[0]) /*user id*/
and is_numeric(@$cookie[1]) /*time*/
and time()-$conf['remember_me_length']<=@$cookie[1]
and time()>=@$cookie[1] /*cookie generated in the past*/ )
{
$key = calculate_auto_login_key( $cookie[0], $cookie[1], $username );
if ($key!==false and $key===$cookie[2])
{
log_user($cookie[0], true);
trigger_action('login_success', stripslashes($username));
return true;
}
}
setcookie($conf['remember_me_name'], '', 0, cookie_path(),ini_get('session.cookie_domain'));
}
return false;
}
/**
* Hashes a password with the PasswordHash class from phpass security library.
* @since 2.5
*
* @param string $password plain text
* @return string
*/
function pwg_password_hash($password)
{
global $pwg_hasher;
if (empty($pwg_hasher))
{
require_once(PHPWG_ROOT_PATH.'include/passwordhash.class.php');
// We use the portable hash feature from phpass because we can't be sure
// Piwigo runs on PHP 5.3+ (and won't run on an older version in the
// future)
$pwg_hasher = new PasswordHash(13, true);
}
return $pwg_hasher->HashPassword($password);
}
/**
* Verifies a password, with the PasswordHash class from phpass security library.
* If the hash is 'old' (assumed MD5) the hash is updated in database, used for
* migration from Piwigo 2.4.
* @since 2.5
*
* @param string $password plain text
* @param string $hash may be md5 or phpass hashed password
* @param integer $user_id only useful to update password hash from md5 to phpass
* @return bool
*/
function pwg_password_verify($password, $hash, $user_id=null)
{
global $conf, $pwg_hasher;
// If the password has not been hashed with the current algorithm.
if (strpos($hash, '$P') !== 0)
{
if (!empty($conf['pass_convert']))
{
$check = ($hash == $conf['pass_convert']($password));
}
else
{
$check = ($hash == md5($password));
}
if ($check)
{
if (!isset($user_id) or $conf['external_authentification'])
{
return true;
}
// Rehash using new hash.
$hash = pwg_password_hash($password);
single_update(
USERS_TABLE,
array('password' => $hash),
array('id' => $user_id)
);
}
}
// If the stored hash is longer than an MD5, presume the
// new style phpass portable hash.
if (empty($pwg_hasher))
{
require_once(PHPWG_ROOT_PATH.'include/passwordhash.class.php');
// We use the portable hash feature
$pwg_hasher = new PasswordHash(13, true);
}
return $pwg_hasher->CheckPassword($password, $hash);
}
/**
* Tries to login a user given username and password (must be MySql escaped).
*
* @param string $username
* @param string $password
* @param bool $remember_me
* @return bool
*/
function try_log_user($username, $password, $remember_me)
{
return trigger_event('try_log_user', false, $username, $password, $remember_me);
}
add_event_handler('try_log_user', 'pwg_login', EVENT_HANDLER_PRIORITY_NEUTRAL, 4);
/**
* Default method for user login, can be overwritten with 'try_log_user' trigger.
* @see try_log_user()
*
* @param string $username
* @param string $password
* @param bool $remember_me
* @return bool
*/
function pwg_login($success, $username, $password, $remember_me)
{
if ($success===true)
{
return true;
}
// we force the session table to be clean
pwg_session_gc();
global $conf;
// retrieving the encrypted password of the login submitted
$query = '
SELECT '.$conf['user_fields']['id'].' AS id,
'.$conf['user_fields']['password'].' AS password
FROM '.USERS_TABLE.'
WHERE '.$conf['user_fields']['username'].' = \''.pwg_db_real_escape_string($username).'\'
;';
$row = pwg_db_fetch_assoc(pwg_query($query));
if ($conf['password_verify']($password, $row['password'], $row['id']))
{
log_user($row['id'], $remember_me);
trigger_action('login_success', stripslashes($username));
return true;
}
trigger_action('login_failure', stripslashes($username));
return false;
}
/**
* Performs all the cleanup on user logout.
*/
function logout_user()
{
global $conf;
trigger_action('user_logout', @$_SESSION['pwg_uid']);
$_SESSION = array();
session_unset();
session_destroy();
setcookie(session_name(),'',0,
ini_get('session.cookie_path'),
ini_get('session.cookie_domain')
);
setcookie($conf['remember_me_name'], '', 0, cookie_path(),ini_get('session.cookie_domain'));
}
/**
* Return user status.
*
* @param string $user_status used if $user not initialized
* @return string
*/
function get_user_status($user_status='')
{
global $user;
if (empty($user_status))
{
if (isset($user['status']))
{
$user_status = $user['status'];
}
else
{
// swicth to default value
$user_status = '';
}
}
return $user_status;
}
/**
* Return ACCESS_* value for a given $status.
*
* @param string $user_status used if $user not initialized
* @return int one of ACCESS_* constants
*/
function get_access_type_status($user_status='')
{
global $conf;
switch (get_user_status($user_status))
{
case 'guest':
{
$access_type_status =
($conf['guest_access'] ? ACCESS_GUEST : ACCESS_FREE);
break;
}
case 'generic':
{
$access_type_status = ACCESS_GUEST;
break;
}
case 'normal':
{
$access_type_status = ACCESS_CLASSIC;
break;
}
case 'admin':
{
$access_type_status = ACCESS_ADMINISTRATOR;
break;
}
case 'webmaster':
{
$access_type_status = ACCESS_WEBMASTER;
break;
}
default:
{
$access_type_status = ACCESS_FREE;
break;
}
}
return $access_type_status;
}
/**
* Returns if user has access to a particular ACCESS_*
*
* @return int $access_type one of ACCESS_* constants
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_autorize_status($access_type, $user_status='')
{
return (get_access_type_status($user_status) >= $access_type);
}
/**
* Abord script if user has no access to a particular ACCESS_*
*
* @return int $access_type one of ACCESS_* constants
* @param string $user_status used if $user not initialized
*/
function check_status($access_type, $user_status='')
{
if (!is_autorize_status($access_type, $user_status))
{
access_denied();
}
}
/**
* Returns if user is generic.
*
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_generic($user_status='')
{
return get_user_status($user_status) == 'generic';
}
/**
* Returns if user is a guest.
*
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_a_guest($user_status='')
{
return get_user_status($user_status) == 'guest';
}
/**
* Returns if user is, at least, a classic user.
*
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_classic_user($user_status='')
{
return is_autorize_status(ACCESS_CLASSIC, $user_status);
}
/**
* Returns if user is, at least, an administrator.
*
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_admin($user_status='')
{
return is_autorize_status(ACCESS_ADMINISTRATOR, $user_status);
}
/**
* Returns if user is a webmaster.
*
* @param string $user_status used if $user not initialized
* @return bool
*/
function is_webmaster($user_status='')
{
return is_autorize_status(ACCESS_WEBMASTER, $user_status);
}
/**
* Returns if current user can edit/delete/validate a comment.
*
* @param string $action edit/delete/validate
* @param int $comment_author_id
* @return bool
*/
function can_manage_comment($action, $comment_author_id)
{
global $user, $conf;
if (is_a_guest())
{
return false;
}
if (!in_array($action, array('delete','edit', 'validate')))
{
return false;
}
if (is_admin())
{
return true;
}
if ('edit' == $action and $conf['user_can_edit_comment'])
{
if ($comment_author_id == $user['id']) {
return true;
}
}
if ('delete' == $action and $conf['user_can_delete_comment'])
{
if ($comment_author_id == $user['id']) {
return true;
}
}
return false;
}
/**
* Compute sql WHERE condition with restrict and filter data.
* "FandF" means Forbidden and Filters.
*
* @param array $condition_fields one witch fields apply each filter
* - forbidden_categories
* - visible_categories
* - forbidden_images
* - visible_images
* @param string $prefix_condition prefixes query if condition is not empty
* @param boolean $force_one_condition use at least "1 = 1"
* @return string
*/
function get_sql_condition_FandF(
$condition_fields,
$prefix_condition = null,
$force_one_condition = false
)
{
global $user, $filter;
$sql_list = array();
foreach ($condition_fields as $condition => $field_name)
{
switch($condition)
{
case 'forbidden_categories':
{
if (!empty($user['forbidden_categories']))
{
$sql_list[] =
$field_name.' NOT IN ('.$user['forbidden_categories'].')';
}
break;
}
case 'visible_categories':
{
if (!empty($filter['visible_categories']))
{
$sql_list[] =
$field_name.' IN ('.$filter['visible_categories'].')';
}
break;
}
case 'visible_images':
if (!empty($filter['visible_images']))
{
$sql_list[] =
$field_name.' IN ('.$filter['visible_images'].')';
}
// note there is no break - visible include forbidden
case 'forbidden_images':
if (
!empty($user['image_access_list'])
or $user['image_access_type']!='NOT IN'
)
{
$table_prefix=null;
if ($field_name=='id')
{
$table_prefix = '';
}
elseif ($field_name=='i.id')
{
$table_prefix = 'i.';
}
if ( isset($table_prefix) )
{
$sql_list[]=$table_prefix.'level<='.$user['level'];
}
elseif ( !empty($user['image_access_list']) and !empty($user['image_access_type']) )
{
$sql_list[]=$field_name.' '.$user['image_access_type']
.' ('.$user['image_access_list'].')';
}
}
break;
default:
{
die('Unknow condition');
break;
}
}
}
if (count($sql_list) > 0)
{
$sql = '('.implode(' AND ', $sql_list).')';
}
else
{
$sql = $force_one_condition ? '1 = 1' : '';
}
if (isset($prefix_condition) and !empty($sql))
{
$sql = $prefix_condition.' '.$sql;
}
return $sql;
}
/**
* Returns sql WHERE condition for recent photos/albums for current user.
*
* @param string $db_field
* @return string
*/
function get_recent_photos_sql($db_field)
{
global $user;
if (!isset($user['last_photo_date']))
{
return '0=1';
}
return $db_field.'>=LEAST('
.pwg_db_get_recent_period_expression($user['recent_period'])
.','.pwg_db_get_recent_period_expression(1,$user['last_photo_date']).')';
}
/**
* Returns a unique activation key.
*
* @return string
*/
function get_user_activation_key()
{
while (true)
{
$key = generate_key(20);
$query = '
SELECT COUNT(*)
FROM '.USER_INFOS_TABLE.'
WHERE activation_key = \''.$key.'\'
;';
list($count) = pwg_db_fetch_row(pwg_query($query));
if (0 == $count)
{
return $key;
}
}
}
?>
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