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extension.driver.php
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extension.driver.php
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<?php
Class extension_frontend_authentication extends Extension{
public function about(){
return array('name' => 'Front End Authentication',
'version' => '1.0',
'release-date' => '2008-09-24',
'author' => array('name' => 'Symphony Team',
'website' => 'http://www.symphony21.com',
'email' => 'team@symphony21.com')
);
}
public function uninstall(){
$this->_Parent->Configuration->remove('frontend-authentication');
$this->_Parent->saveConfig();
}
public function getSubscribedDelegates(){
return array(
array(
'page' => '/system/preferences/',
'delegate' => 'AddCustomPreferenceFieldsets',
'callback' => 'appendPreferences'
),
array(
'page' => '/frontend/',
'delegate' => 'FrontendPageResolved',
'callback' => '__authenticate'
),
array(
'page' => '/frontend/',
'delegate' => 'FrontendEventPostProcess',
'callback' => '__appendEventXML'
),
array(
'page' => '/frontend/',
'delegate' => 'FrontendParamsResolve',
'callback' => '__processForgottenPasswordRequest'
),
array(
'page' => '/system/preferences/',
'delegate' => 'Save',
'callback' => '__SavePreferences'
),
);
}
public function __SavePreferences($context){
$context['settings']['frontend-authentication']['email-subject'] = $context['settings']['frontend-authentication']['email-subject'];
$context['settings']['frontend-authentication']['email-body'] = $context['settings']['frontend-authentication']['email-body'];
if(!isset($_POST['settings']['frontend-authentication']['use-sessions'])){
$context['settings']['frontend-authentication']['use-sessions'] = 'no';
}
}
private static function __replaceParams($string, $params){
foreach($params as $key => $value){
$string = str_replace("{\$$key}", $value, $string);
}
return $string;
}
public function __processForgottenPasswordRequest($context){
if(isset($_POST['action']['front-end-authentication']['forgot'])){
$username = (function_exists('mysql_real_escape_string')
? mysql_real_escape_string($_POST['front-end-authentication']['username'])
: addslashes($_POST['front-end-authentication']['username']));
$password = $this->__getPasswordFromUsername($username);
if(strlen($password) > 0){
$params = $context['params'];
$params += array('username' => $username, 'password' => $password);
$subject = self::__replaceParams(stripslashes($this->_Parent->Configuration->get('email-subject', 'frontend-authentication')), $params);
$body = self::__replaceParams(stripslashes($this->_Parent->Configuration->get('email-body', 'frontend-authentication')), $params);
General::sendEmail($username, 'noreply@' . parse_url($params['root'], PHP_URL_HOST), $params['website-name'], $subject, $body);
define_safe('FRONT_END_AUTHENTICATION_EMAIL_SENT', true);
return;
}
define_safe('FRONT_END_AUTHENTICATION_EMAIL_SENT', false);
return;
}
}
public function __appendEventXML($context){
if(defined('FRONT_END_AUTHENTICATION_SUCCESSFUL')){
$context['xml']->appendChild(new XMLElement('front-end-authentication', NULL, array('status' => (FRONT_END_AUTHENTICATION_SUCCESSFUL == true ? 'authenticated' : 'invalid'))));
}
elseif(defined('FRONT_END_AUTHENTICATION_EMAIL_SENT')){
$context['xml']->appendChild(new XMLElement('front-end-authentication', NULL, array('password-retrieval-email-status' => (FRONT_END_AUTHENTICATION_EMAIL_SENT == true ? 'sent' : 'failed'))));
}
}
private function __createCookie($username, $password){
if($this->_Parent->Configuration->get('use-sessions', 'frontend-authentication') == 'yes'){
$_SESSION[__SYM_COOKIE_PREFIX_ . 'front-end-authentication'] = array('username' => $username, 'password' => md5($password));
}
else{
$Cookie = new Cookie(__SYM_COOKIE_PREFIX_ . 'front-end-authentication', (24 * 60 * 60), __SYM_COOKIE_PATH__);
$Cookie->set('username', $username);
$Cookie->set('password', md5($password));
}
}
private function __expireCookie(){
session_destroy();
$Cookie = new Cookie(__SYM_COOKIE_PREFIX_ . 'front-end-authentication', (24 * 60 * 60), __SYM_COOKIE_PATH__);
$Cookie->expire();
}
private function __validate($username, $password, $isHash=false){
$username = (function_exists('mysql_real_escape_string') ? mysql_real_escape_string($username) : addslashes($username));
$password = (function_exists('mysql_real_escape_string') ? mysql_real_escape_string($password) : addslashes($password));
$username_field = $this->_Parent->Configuration->get('username-field', 'frontend-authentication');
$password_field = $this->_Parent->Configuration->get('password-field', 'frontend-authentication');
$sql = "SELECT `t1`.entry_id
FROM `tbl_entries_data_{$username_field}` AS `t1`
LEFT JOIN `tbl_entries_data_{$password_field}` AS `t2` ON t1.entry_id = t2.entry_id
WHERE `t1`.value = '{$username}' AND ".($isHash ? "MD5(`t2`.`value`)" : "t2.value")." = '{$password}'
LIMIT 1";
$id = $this->_Parent->Database->fetchVar('entry_id', 0, $sql);
return ((integer)$id > 0);
}
private function __getPasswordFromUsername($username){
$username = (function_exists('mysql_real_escape_string') ? mysql_real_escape_string($username) : addslashes($username));
$username_field = $this->_Parent->Configuration->get('username-field', 'frontend-authentication');
$password_field = $this->_Parent->Configuration->get('password-field', 'frontend-authentication');
$sql = "SELECT `t2`.value AS `password`
FROM `tbl_entries_data_{$username_field}` AS `t1`
LEFT JOIN `tbl_entries_data_{$password_field}` AS `t2` ON t1.entry_id = t2.entry_id
WHERE `t1`.value = '{$username}'
LIMIT 1";
return $this->_Parent->Database->fetchVar('password', 0, $sql);
}
public function __authenticate($context){
$path = '/' . $this->_Parent->resolvePagePath($context['page_data']['id']);
$bOnLoginPage = ($path == $context['parent']->Configuration->get('login-page', 'frontend-authentication'));
if($this->_Parent->Configuration->get('use-sessions', 'frontend-authentication') == 'yes'){
session_start();
}
if(isset($_GET['front-end-authentication-logout'])){
$this->__expireCookie();
}
## Check for post data, use it for creation of a cookie
if(isset($_POST['action']['front-end-authentication']['login'])){
$username = $_POST['front-end-authentication']['username'];
$password = $_POST['front-end-authentication']['password'];
if($this->__validate($username, $password)){
$this->__createCookie($username, $password);
define_safe('FRONT_END_AUTHENTICATION_SUCCESSFUL', true);
if($bOnLoginPage) redirect(URL);
return;
}
define_safe('FRONT_END_AUTHENTICATION_SUCCESSFUL', false);
}
## Check for a session, and validate it
elseif($this->_Parent->Configuration->get('use-sessions', 'frontend-authentication') == 'yes'){
if(isset($_SESSION[__SYM_COOKIE_PREFIX_ . 'front-end-authentication'])){
$username = $_SESSION[__SYM_COOKIE_PREFIX_ . 'front-end-authentication']['username'];
$password = $_SESSION[__SYM_COOKIE_PREFIX_ . 'front-end-authentication']['password'];
if($this->__validate($username, $password, true)){
define_safe('FRONT_END_AUTHENTICATION_SUCCESSFUL', true);
if($bOnLoginPage) redirect(URL);
return;
}
$this->__expireCookie();
}
}
## Check for a cookie, and validate it
elseif(isset($_COOKIE[__SYM_COOKIE_PREFIX_ . 'front-end-authentication'])){
$username = $_COOKIE[__SYM_COOKIE_PREFIX_ . 'front-end-authentication']['username'];
$password = $_COOKIE[__SYM_COOKIE_PREFIX_ . 'front-end-authentication']['password'];
if($this->__validate($username, $password, true)){
define_safe('FRONT_END_AUTHENTICATION_SUCCESSFUL', true);
if($bOnLoginPage) redirect(URL);
return;
}
$this->__expireCookie();
}
$types = $context['page_data']['type'];
## No luck, kick to login page
if(!$bOnLoginPage && is_array($types) && in_array($context['parent']->Configuration->get('page-type', 'frontend-authentication'), $types))
$context['page_data'] = $context['page']->resolvePage(trim($context['parent']->Configuration->get('login-page', 'frontend-authentication'), '/'));
}
public function appendPreferences($context){
$group = new XMLElement('fieldset');
$group->setAttribute('class', 'settings');
$group->appendChild(new XMLElement('legend', 'Front End Authentication'));
$div = new XMLElement('div', NULL, array('class' => 'group'));
$label = Widget::Label('Page Type');
$label->appendChild(Widget::Input('settings[frontend-authentication][page-type]', General::Sanitize($context['parent']->Configuration->get('page-type', 'frontend-authentication'))));
$div->appendChild($label);
$pages = $this->_Parent->Database->fetch("SELECT `id`, `title` FROM `tbl_pages` ORDER BY `title` ASC");
$label = Widget::Label('Login Page');
$options = array();
if(is_array($pages) && !empty($pages)){
foreach($pages as $page){
$path = '/' . $this->_Parent->resolvePagePath($page['id']);
$options[] = array($path, $context['parent']->Configuration->get('login-page', 'frontend-authentication') == $path, $path);
}
}
$label->appendChild(Widget::Select('settings[frontend-authentication][login-page]', $options));
$div->appendChild($label);
$group->appendChild($div);
$group->appendChild(new XMLElement('p', 'Any page with this type will check for a valid cookie, otherwise be thrown to a login screen', array('class' => 'help')));
$div = new XMLElement('div', NULL, array('class' => 'group'));
$fields = $this->_Parent->Database->fetch("SELECT t1.*, t2.name as `section` FROM `tbl_fields` AS `t1`
LEFT JOIN `tbl_sections` AS `t2` ON `t1`.parent_section = t2.id
WHERE `t1`.type NOT IN ('checkbox', 'select', 'sectionlink', 'date', 'textarea', 'upload', 'author')
ORDER BY t1.`parent_section` ASC, t1.`element_name` ASC");
$label = Widget::Label('Username Field');
$options = array();
if(is_array($fields) && !empty($fields)){
foreach($fields as $field){
$options[] = array($field['id'], $context['parent']->Configuration->get('username-field', 'frontend-authentication') == $field['id'], $field['section'] . ' > ' . $field['label']);
}
}
$label->appendChild(Widget::Select('settings[frontend-authentication][username-field]', $options));
$div->appendChild($label);
$label = Widget::Label('Password Field');
$options = array();
if(is_array($fields) && !empty($fields)){
foreach($fields as $field){
$options[] = array($field['id'], $context['parent']->Configuration->get('password-field', 'frontend-authentication') == $field['id'], $field['section'] . ' > ' . $field['label']);
}
}
$label->appendChild(Widget::Select('settings[frontend-authentication][password-field]', $options));
$div->appendChild($label);
$group->appendChild($div);
$group->appendChild(new XMLElement('p', 'Both fields must be from the same section', array('class' => 'help')));
$label = Widget::Label();
$input = Widget::Input('settings[frontend-authentication][use-sessions]', 'yes', 'checkbox');
if($this->_Parent->Configuration->get('use-sessions', 'frontend-authentication') == 'yes') $input->setAttribute('checked', 'checked');
$label->setValue($input->generate() . ' Use sessions instead of cookies');
$group->appendChild($label);
$group->appendChild(new XMLElement('p', 'Sessions expire when the browser is closed. They are stored on the server are considered more secure than cookies.', array('class' => 'help')));
$label = Widget::Label('Password Retrieval Email Subject');
$label->appendChild(Widget::Input('settings[frontend-authentication][email-subject]', stripslashes($context['parent']->Configuration->get('email-subject', 'frontend-authentication'))));
$group->appendChild($label);
$label = Widget::Label('Password Retrieval Email Body');
$label->appendChild(Widget::Textarea('settings[frontend-authentication][email-body]', 10, 50, stripslashes($context['parent']->Configuration->get('email-body', 'frontend-authentication'))));
$group->appendChild($label);
$group->appendChild(new XMLElement('p', 'Use <code>{$password}</code> and <code>{$username}</code> for dynamic values. Any parameters in the XSLT can also be used. E.G. <code>{$root}</code>', array('class' => 'help')));
$context['wrapper']->appendChild($group);
}
}