97 lines
2.8 KiB
PHP
97 lines
2.8 KiB
PHP
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<?php
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/**
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* HTTP Digest authentication backend class
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*
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* This class can be used by authentication objects wishing to use HTTP Digest
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* Most of the digest logic is handled, implementors just need to worry about
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* the getDigestHash method
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2011 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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abstract class Sabre_DAV_Auth_Backend_AbstractDigest implements Sabre_DAV_Auth_IBackend {
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/**
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* This variable holds the currently logged in username.
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*
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* @var array|null
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*/
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protected $currentUser;
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/**
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* Returns a users digest hash based on the username and realm.
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*
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* If the user was not known, null must be returned.
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*
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* @param string $realm
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* @param string $username
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* @return string|null
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*/
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abstract public function getDigestHash($realm,$username);
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/**
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* Authenticates the user based on the current request.
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*
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* If authentication is succesful, true must be returned.
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* If authentication fails, an exception must be thrown.
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*
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* @throws Sabre_DAV_Exception_NotAuthenticated
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* @return bool
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*/
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public function authenticate(Sabre_DAV_Server $server,$realm) {
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$digest = new Sabre_HTTP_DigestAuth();
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// Hooking up request and response objects
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$digest->setHTTPRequest($server->httpRequest);
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$digest->setHTTPResponse($server->httpResponse);
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$digest->setRealm($realm);
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$digest->init();
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$username = $digest->getUsername();
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// No username was given
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if (!$username) {
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$digest->requireLogin();
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throw new Sabre_DAV_Exception_NotAuthenticated('No digest authentication headers were found');
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}
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$hash = $this->getDigestHash($realm, $username);
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// If this was false, the user account didn't exist
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if ($hash===false || is_null($hash)) {
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$digest->requireLogin();
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throw new Sabre_DAV_Exception_NotAuthenticated('The supplied username was not on file');
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}
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if (!is_string($hash)) {
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throw new Sabre_DAV_Exception('The returned value from getDigestHash must be a string or null');
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}
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// If this was false, the password or part of the hash was incorrect.
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if (!$digest->validateA1($hash)) {
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$digest->requireLogin();
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throw new Sabre_DAV_Exception_NotAuthenticated('Incorrect username');
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}
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$this->currentUser = $username;
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return true;
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}
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/**
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* Returns the currently logged in username.
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*
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* @return string|null
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*/
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public function getCurrentUser() {
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return $this->currentUser;
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}
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}
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