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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
/**
* Storage driver for use against PEAR MDB2
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.01 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_01.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category Authentication
* @package Auth
* @author Lorenzo Alberton <l.alberton@quipo.it>
* @author Adam Ashley <aashley@php.net>
* @copyright 2001-2006 The PHP Group
* @license http://www.php.net/license/3_01.txt PHP License 3.01
* @version CVS: $Id: MDB2.php 256753 2008-04-04 07:57:02Z aashley $
* @link http://pear.php.net/package/Auth
* @since File available since Release 1.3.0
*/
/**
* Include Auth_Container base class
*/
require_once 'Auth/Container.php';
/**
* Include PEAR MDB2 package
*/
require_once 'MDB2.php';
/**
* Storage driver for fetching login data from a database
*
* This storage driver can use all databases which are supported
* by the PEAR MDB2 abstraction layer to fetch login data.
*
* @category Authentication
* @package Auth
* @author Lorenzo Alberton <l.alberton@quipo.it>
* @author Adam Ashley <aashley@php.net>
* @copyright 2001-2006 The PHP Group
* @license http://www.php.net/license/3_01.txt PHP License 3.01
* @version Release: @package_version@ File: $Revision: 256753 $
* @link http://pear.php.net/package/Auth
* @since Class available since Release 1.3.0
*/
class Auth_Container_MDB2 extends Auth_Container
{
// {{{ properties
/**
* Additional options for the storage container
* @var array
*/
var $options = array();
/**
* MDB object
* @var object
*/
var $db = null;
var $dsn = '';
/**
* User that is currently selected from the DB.
* @var string
*/
var $activeUser = '';
// }}}
// {{{ Auth_Container_MDB2() [constructor]
/**
* Constructor of the container class
*
* Initate connection to the database via PEAR::MDB2
*
* @param string Connection data or MDB2 object
* @return object Returns an error object if something went wrong
*/
function Auth_Container_MDB2($dsn)
{
$this->_setDefaults();
if (is_array($dsn)) {
$this->_parseOptions($dsn);
if (empty($this->options['dsn'])) {
PEAR::raiseError('No connection parameters specified!');
}
} else {
$this->options['dsn'] = $dsn;
}
}
// }}}
// {{{ _connect()
/**
* Connect to database by using the given DSN string
*
* @access private
* @param mixed DSN string | array | mdb object
* @return mixed Object on error, otherwise bool
*/
function _connect($dsn)
{
$this->log('Auth_Container_MDB2::_connect() called.', AUTH_LOG_DEBUG);
if (is_string($dsn) || is_array($dsn)) {
$this->db =& MDB2::connect($dsn, $this->options['db_options']);
} elseif (is_subclass_of($dsn, 'MDB2_Driver_Common')) {
$this->db = $dsn;
} elseif (is_object($dsn) && MDB2::isError($dsn)) {
return PEAR::raiseError($dsn->getMessage(), $dsn->code);
} else {
return PEAR::raiseError('The given dsn was not valid in file ' . __FILE__ . ' at line ' . __LINE__,
41,
PEAR_ERROR_RETURN,
null,
null
);
}
if (MDB2::isError($this->db) || PEAR::isError($this->db)) {
return PEAR::raiseError($this->db->getMessage(), $this->db->code);
}
if ($this->options['auto_quote']) {
if (strpos('.', $this->options['table']) === false) {
$this->options['final_table'] = $this->db->quoteIdentifier($this->options['table'], true);
} else {
$t = explode('.', $this->options['table']);
for ($i = 0, $count = count($t); $i < $count; $i++)
$t[$i] = $this->db->quoteIdentifier($t[$i], true);
$this->options['final_table'] = implode('.', $t);
}
$this->options['final_usernamecol'] = $this->db->quoteIdentifier($this->options['usernamecol'], true);
$this->options['final_passwordcol'] = $this->db->quoteIdentifier($this->options['passwordcol'], true);
} else {
$this->options['final_table'] = $this->options['table'];
$this->options['final_usernamecol'] = $this->options['usernamecol'];
$this->options['final_passwordcol'] = $this->options['passwordcol'];
}
return true;
}
// }}}
// {{{ _prepare()
/**
* Prepare database connection
*
* This function checks if we have already opened a connection to
* the database. If that's not the case, a new connection is opened.
*
* @access private
* @return mixed True or a MDB error object.
*/
function _prepare()
{
if (is_subclass_of($this->db, 'MDB2_Driver_Common')) {
return true;
}
return $this->_connect($this->options['dsn']);
}
// }}}
// {{{ query()
/**
* Prepare query to the database
*
* This function checks if we have already opened a connection to
* the database. If that's not the case, a new connection is opened.
* After that the query is passed to the database.
*
* @access public
* @param string Query string
* @return mixed a MDB_result object or MDB_OK on success, a MDB
* or PEAR error on failure
*/
function query($query)
{
$this->log('Auth_Container_MDB2::query() called.', AUTH_LOG_DEBUG);
$err = $this->_prepare();
if ($err !== true) {
return $err;
}
return $this->db->exec($query);
}
// }}}
// {{{ _setDefaults()
/**
* Set some default options
*
* @access private
* @return void
*/
function _setDefaults()
{
$this->options['table'] = 'auth';
$this->options['usernamecol'] = 'username';
$this->options['passwordcol'] = 'password';
$this->options['dsn'] = '';
$this->options['db_fields'] = '';
$this->options['cryptType'] = 'md5';
$this->options['db_options'] = array();
$this->options['db_where'] = '';
$this->options['auto_quote'] = true;
}
// }}}
// {{{ _parseOptions()
/**
* Parse options passed to the container class
*
* @access private
* @param array
*/
function _parseOptions($array)
{
foreach ($array as $key => $value) {
if (isset($this->options[$key])) {
$this->options[$key] = $value;
}
}
}
// }}}
// {{{ _quoteDBFields()
/**
* Quote the db_fields option to avoid the possibility of SQL injection.
*
* @access private
* @return string A properly quoted string that can be concatenated into a
* SELECT clause.
*/
function _quoteDBFields()
{
if (isset($this->options['db_fields'])) {
if (is_array($this->options['db_fields'])) {
if ($this->options['auto_quote']) {
$fields = array();
foreach ($this->options['db_fields'] as $field) {
$fields[] = $this->db->quoteIdentifier($field, true);
}
return implode(', ', $fields);
} else {
return implode(', ', $this->options['db_fields']);
}
} else {
if (strlen($this->options['db_fields']) > 0) {
if ($this->options['auto_quote']) {
return $this->db->quoteIdentifier($this->options['db_fields'], true);
} else {
return $this->options['db_fields'];
}
}
}
}
return '';
}
// }}}
// {{{ fetchData()
/**
* Get user information from database
*
* This function uses the given username to fetch
* the corresponding login data from the database
* table. If an account that matches the passed username
* and password is found, the function returns true.
* Otherwise it returns false.
*
* @param string Username
* @param string Password
* @param boolean If true password is secured using a md5 hash
* the frontend and auth are responsible for making sure the container supports
* challenge response password authentication
* @return mixed Error object or boolean
*/
function fetchData($username, $password, $isChallengeResponse=false)
{
$this->log('Auth_Container_MDB2::fetchData() called.', AUTH_LOG_DEBUG);
// Prepare for a database query
$err = $this->_prepare();
if ($err !== true) {
return PEAR::raiseError($err->getMessage(), $err->getCode());
}
//Check if db_fields contains a *, if so assume all columns are selected
if (is_string($this->options['db_fields'])
&& strstr($this->options['db_fields'], '*')) {
$sql_from = '*';
} else {
$sql_from = $this->options['final_usernamecol'].
", ".$this->options['final_passwordcol'];
if (strlen($fields = $this->_quoteDBFields()) > 0) {
$sql_from .= ', '.$fields;
}
}
$query = sprintf("SELECT %s FROM %s WHERE %s = %s",
$sql_from,
$this->options['final_table'],
$this->options['final_usernamecol'],
$this->db->quote($username, 'text')
);
// check if there is an optional parameter db_where
if ($this->options['db_where'] != '') {
// there is one, so add it to the query
$query .= " AND ".$this->options['db_where'];
}
$this->log('Running SQL against MDB2: '.$query, AUTH_LOG_DEBUG);
$res = $this->db->queryRow($query, null, MDB2_FETCHMODE_ASSOC);
if (MDB2::isError($res) || PEAR::isError($res)) {
return PEAR::raiseError($res->getMessage(), $res->getCode());
}
if (!is_array($res)) {
$this->activeUser = '';
return false;
}
// Perform trimming here before the hashing
$password = trim($password, "\r\n");
$res[$this->options['passwordcol']] = trim($res[$this->options['passwordcol']], "\r\n");
// If using Challenge Response md5 the pass with the secret
if ($isChallengeResponse) {
$res[$this->options['passwordcol']] =
md5($res[$this->options['passwordcol']].$this->_auth_obj->session['loginchallenege']);
// UGLY cannot avoid without modifying verifyPassword
if ($this->options['cryptType'] == 'md5') {
$res[$this->options['passwordcol']] = md5($res[$this->options['passwordcol']]);
}
}
if ($this->verifyPassword($password,
$res[$this->options['passwordcol']],
$this->options['cryptType'])) {
// Store additional field values in the session
foreach ($res as $key => $value) {
if ($key == $this->options['passwordcol'] ||
$key == $this->options['usernamecol']) {
continue;
}
$this->log('Storing additional field: '.$key, AUTH_LOG_DEBUG);
// Use reference to the auth object if exists
// This is because the auth session variable can change so a static call to setAuthData does not make sense
$this->_auth_obj->setAuthData($key, $value);
}
return true;
}
$this->activeUser = $res[$this->options['usernamecol']];
return false;
}
// }}}
// {{{ listUsers()
/**
* Returns a list of users from the container
*
* @return mixed array|PEAR_Error
* @access public
*/
function listUsers()
{
$this->log('Auth_Container_MDB2::listUsers() called.', AUTH_LOG_DEBUG);
$err = $this->_prepare();
if ($err !== true) {
return PEAR::raiseError($err->getMessage(), $err->getCode());
}
$retVal = array();
//Check if db_fields contains a *, if so assume all columns are selected
if ( is_string($this->options['db_fields'])
&& strstr($this->options['db_fields'], '*')) {
$sql_from = '*';
} else {
$sql_from = $this->options['final_usernamecol'].
", ".$this->options['final_passwordcol'];
if (strlen($fields = $this->_quoteDBFields()) > 0) {
$sql_from .= ', '.$fields;
}
}
$query = sprintf('SELECT %s FROM %s',
$sql_from,
$this->options['final_table']
);
// check if there is an optional parameter db_where
if ($this->options['db_where'] != '') {
// there is one, so add it to the query
$query .= " WHERE ".$this->options['db_where'];
}
$this->log('Running SQL against MDB2: '.$query, AUTH_LOG_DEBUG);
$res = $this->db->queryAll($query, null, MDB2_FETCHMODE_ASSOC);
if (MDB2::isError($res)) {
return PEAR::raiseError($res->getMessage(), $res->getCode());
} else {
foreach ($res as $user) {
$user['username'] = $user[$this->options['usernamecol']];
$retVal[] = $user;
}
}
$this->log('Found '.count($retVal).' users.', AUTH_LOG_DEBUG);
return $retVal;
}
// }}}
// {{{ addUser()
/**
* Add user to the storage container
*
* @access public
* @param string Username
* @param string Password
* @param mixed Additional information that are stored in the DB
*
* @return mixed True on success, otherwise error object
*/
function addUser($username, $password, $additional = "")
{
$this->log('Auth_Container_MDB2::addUser() called.', AUTH_LOG_DEBUG);
// Prepare for a database query
$err = $this->_prepare();
if ($err !== true) {
return PEAR::raiseError($err->getMessage(), $err->getCode());
}
if (isset($this->options['cryptType']) && $this->options['cryptType'] == 'none') {
$cryptFunction = 'strval';
} elseif (isset($this->options['cryptType']) && function_exists($this->options['cryptType'])) {
$cryptFunction = $this->options['cryptType'];
} else {
$cryptFunction = 'md5';
}
$password = $cryptFunction($password);
$additional_key = '';
$additional_value = '';
if (is_array($additional)) {
foreach ($additional as $key => $value) {
if ($this->options['auto_quote']) {
$additional_key .= ', ' . $this->db->quoteIdentifier($key, true);
} else {
$additional_key .= ', ' . $key;
}
$additional_value .= ', ' . $this->db->quote($value, 'text');
}
}
$query = sprintf("INSERT INTO %s (%s, %s%s) VALUES (%s, %s%s)",
$this->options['final_table'],
$this->options['final_usernamecol'],
$this->options['final_passwordcol'],
$additional_key,
$this->db->quote($username, 'text'),
$this->db->quote($password, 'text'),
$additional_value
);
$this->log('Running SQL against MDB2: '.$query, AUTH_LOG_DEBUG);
$res = $this->query($query);
if (MDB2::isError($res)) {
return PEAR::raiseError($res->getMessage(), $res->code);
}
return true;
}
// }}}
// {{{ removeUser()
/**
* Remove user from the storage container
*
* @access public
* @param string Username
*
* @return mixed True on success, otherwise error object
*/
function removeUser($username)
{
$this->log('Auth_Container_MDB2::removeUser() called.', AUTH_LOG_DEBUG);
// Prepare for a database query
$err = $this->_prepare();
if ($err !== true) {
return PEAR::raiseError($err->getMessage(), $err->getCode());
}
$query = sprintf("DELETE FROM %s WHERE %s = %s",
$this->options['final_table'],
$this->options['final_usernamecol'],
$this->db->quote($username, 'text')
);
// check if there is an optional parameter db_where
if ($this->options['db_where'] != '') {
// there is one, so add it to the query
$query .= " AND ".$this->options['db_where'];
}
$this->log('Running SQL against MDB2: '.$query, AUTH_LOG_DEBUG);
$res = $this->query($query);
if (MDB2::isError($res)) {
return PEAR::raiseError($res->getMessage(), $res->code);
}
return true;
}
// }}}
// {{{ changePassword()
/**
* Change password for user in the storage container
*
* @param string Username
* @param string The new password (plain text)
*/
function changePassword($username, $password)
{
$this->log('Auth_Container_MDB2::changePassword() called.', AUTH_LOG_DEBUG);
// Prepare for a database query
$err = $this->_prepare();
if ($err !== true) {
return PEAR::raiseError($err->getMessage(), $err->getCode());
}
if (isset($this->options['cryptType']) && $this->options['cryptType'] == 'none') {
$cryptFunction = 'strval';
} elseif (isset($this->options['cryptType']) && function_exists($this->options['cryptType'])) {
$cryptFunction = $this->options['cryptType'];
} else {
$cryptFunction = 'md5';
}
$password = $cryptFunction($password);
$query = sprintf("UPDATE %s SET %s = %s WHERE %s = %s",
$this->options['final_table'],
$this->options['final_passwordcol'],
$this->db->quote($password, 'text'),
$this->options['final_usernamecol'],
$this->db->quote($username, 'text')
);
// check if there is an optional parameter db_where
if ($this->options['db_where'] != '') {
// there is one, so add it to the query
$query .= " AND ".$this->options['db_where'];
}
$this->log('Running SQL against MDB2: '.$query, AUTH_LOG_DEBUG);
$res = $this->query($query);
if (MDB2::isError($res)) {
return PEAR::raiseError($res->getMessage(), $res->code);
}
return true;
}
// }}}
// {{{ supportsChallengeResponse()
/**
* Determine if this container supports
* password authentication with challenge response
*
* @return bool
* @access public
*/
function supportsChallengeResponse()
{
return in_array($this->options['cryptType'], array('md5', 'none', ''));
}
// }}}
// {{{ getCryptType()
/**
* Returns the selected crypt type for this container
*
* @return string Function used to crypt the password
*/
function getCryptType()
{
return $this->options['cryptType'];
}
// }}}
}
?>
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