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<?php
/**
* Base include file for SimpleTest
* @package SimpleTest
* @subpackage WebTester
* @version $Id: authentication.php,v 1.10 2005/07/26 01:27:18 lastcraft Exp $
*/
/**
* include http class
*/
require_once(dirname(__FILE__) . '/http.php');
/**
* Represents a single security realm's identity.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleRealm {
var $_type;
var $_root;
var $_username;
var $_password;
/**
* Starts with the initial entry directory.
* @param string $type Authentication type for this
* realm. Only Basic authentication
* is currently supported.
* @param SimpleUrl $url Somewhere in realm.
* @access public
*/
function SimpleRealm($type, $url) {
$this->_type = $type;
$this->_root = $url->getBasePath();
$this->_username = false;
$this->_password = false;
}
/**
* Adds another location to the realm.
* @param SimpleUrl $url Somewhere in realm.
* @access public
*/
function stretch($url) {
$this->_root = $this->_getCommonPath($this->_root, $url->getPath());
}
/**
* Finds the common starting path.
* @param string $first Path to compare.
* @param string $second Path to compare.
* @return string Common directories.
* @access private
*/
function _getCommonPath($first, $second) {
$first = explode('/', $first);
$second = explode('/', $second);
for ($i = 0; $i < min(count($first), count($second)); $i++) {
if ($first[$i] != $second[$i]) {
return implode('/', array_slice($first, 0, $i)) . '/';
}
}
return implode('/', $first) . '/';
}
/**
* Sets the identity to try within this realm.
* @param string $username Username in authentication dialog.
* @param string $username Password in authentication dialog.
* @access public
*/
function setIdentity($username, $password) {
$this->_username = $username;
$this->_password = $password;
}
/**
* Accessor for current identity.
* @return string Last succesful username.
* @access public
*/
function getUsername() {
return $this->_username;
}
/**
* Accessor for current identity.
* @return string Last succesful password.
* @access public
*/
function getPassword() {
return $this->_password;
}
/**
* Test to see if the URL is within the directory
* tree of the realm.
* @param SimpleUrl $url URL to test.
* @return boolean True if subpath.
* @access public
*/
function isWithin($url) {
if ($this->_isIn($this->_root, $url->getBasePath())) {
return true;
}
if ($this->_isIn($this->_root, $url->getBasePath() . $url->getPage() . '/')) {
return true;
}
return false;
}
/**
* Tests to see if one string is a substring of
* another.
* @param string $part Small bit.
* @param string $whole Big bit.
* @return boolean True if the small bit is
* in the big bit.
* @access private
*/
function _isIn($part, $whole) {
return strpos($whole, $part) === 0;
}
}
/**
* Manages security realms.
* @package SimpleTest
* @subpackage WebTester
*/
class SimpleAuthenticator {
var $_realms;
/**
* Clears the realms.
* @access public
*/
function SimpleAuthenticator() {
$this->restartSession();
}
/**
* Starts with no realms set up.
* @access public
*/
function restartSession() {
$this->_realms = array();
}
/**
* Adds a new realm centered the current URL.
* Browsers vary wildly on their behaviour in this
* regard. Mozilla ignores the realm and presents
* only when challenged, wasting bandwidth. IE
* just carries on presenting until a new challenge
* occours. SimpleTest tries to follow the spirit of
* the original standards committee and treats the
* base URL as the root of a file tree shaped realm.
* @param SimpleUrl $url Base of realm.
* @param string $type Authentication type for this
* realm. Only Basic authentication
* is currently supported.
* @param string $realm Name of realm.
* @access public
*/
function addRealm($url, $type, $realm) {
$this->_realms[$url->getHost()][$realm] = new SimpleRealm($type, $url);
}
/**
* Sets the current identity to be presented
* against that realm.
* @param string $host Server hosting realm.
* @param string $realm Name of realm.
* @param string $username Username for realm.
* @param string $password Password for realm.
* @access public
*/
function setIdentityForRealm($host, $realm, $username, $password) {
if (isset($this->_realms[$host][$realm])) {
$this->_realms[$host][$realm]->setIdentity($username, $password);
}
}
/**
* Finds the name of the realm by comparing URLs.
* @param SimpleUrl $url URL to test.
* @return SimpleRealm Name of realm.
* @access private
*/
function _findRealmFromUrl($url) {
if (! isset($this->_realms[$url->getHost()])) {
return false;
}
foreach ($this->_realms[$url->getHost()] as $name => $realm) {
if ($realm->isWithin($url)) {
return $realm;
}
}
return false;
}
/**
* Presents the appropriate headers for this location.
* @param SimpleHttpRequest $request Request to modify.
* @param SimpleUrl $url Base of realm.
* @access public
*/
function addHeaders(&$request, $url) {
if ($url->getUsername() && $url->getPassword()) {
$username = $url->getUsername();
$password = $url->getPassword();
} elseif ($realm = $this->_findRealmFromUrl($url)) {
$username = $realm->getUsername();
$password = $realm->getPassword();
} else {
return;
}
$this->addBasicHeaders($request, $username, $password);
}
/**
* Presents the appropriate headers for this
* location for basic authentication.
* @param SimpleHttpRequest $request Request to modify.
* @param string $username Username for realm.
* @param string $password Password for realm.
* @access public
* @static
*/
static function addBasicHeaders(&$request, $username, $password) {
if ($username && $password) {
$request->addHeaderLine(
'Authorization: Basic ' . base64_encode("$username:$password"));
}
}
}
?>
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