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139 lines
3.9 KiB
PHP
139 lines
3.9 KiB
PHP
<?php
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namespace Sabre\DAV\Auth\Backend;
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use Sabre\DAV;
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use Sabre\HTTP;
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use Sabre\HTTP\RequestInterface;
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use Sabre\HTTP\ResponseInterface;
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/**
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* HTTP Bearer authentication backend class
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*
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* This class can be used by authentication objects wishing to use HTTP Bearer
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* Most of the digest logic is handled, implementors just need to worry about
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* the validateBearerToken method.
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*
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* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
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* @author François Kooman (https://tuxed.net/)
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* @author James David Low (http://jameslow.com/)
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* @author Evert Pot (http://evertpot.com/)
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* @license http://sabre.io/license/ Modified BSD License
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*/
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abstract class AbstractBearer implements BackendInterface {
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/**
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* Authentication Realm.
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*
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* The realm is often displayed by browser clients when showing the
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* authentication dialog.
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*
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* @var string
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*/
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protected $realm = 'sabre/dav';
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/**
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* Validates a Bearer token
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*
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* This method should return the full principal url, or false if the
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* token was incorrect.
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*
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* @param string $bearerToken
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* @return string|false
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*/
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abstract protected function validateBearerToken($bearerToken);
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/**
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* Sets the authentication realm for this backend.
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*
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* @param string $realm
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* @return void
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*/
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function setRealm($realm) {
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$this->realm = $realm;
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}
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/**
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* When this method is called, the backend must check if authentication was
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* successful.
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*
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* The returned value must be one of the following
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*
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* [true, "principals/username"]
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* [false, "reason for failure"]
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*
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* If authentication was successful, it's expected that the authentication
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* backend returns a so-called principal url.
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*
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* Examples of a principal url:
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*
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* principals/admin
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* principals/user1
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* principals/users/joe
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* principals/uid/123457
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*
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* If you don't use WebDAV ACL (RFC3744) we recommend that you simply
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* return a string such as:
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*
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* principals/users/[username]
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*
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* @param RequestInterface $request
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* @param ResponseInterface $response
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* @return array
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*/
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function check(RequestInterface $request, ResponseInterface $response) {
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$auth = new HTTP\Auth\Bearer(
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$this->realm,
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$request,
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$response
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);
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$bearerToken = $auth->getToken($request);
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if (!$bearerToken) {
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return [false, "No 'Authorization: Bearer' header found. Either the client didn't send one, or the server is mis-configured"];
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}
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$principalUrl = $this->validateBearerToken($bearerToken);
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if (!$principalUrl) {
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return [false, "Bearer token was incorrect"];
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}
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return [true, $principalUrl];
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}
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/**
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* This method is called when a user could not be authenticated, and
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* authentication was required for the current request.
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*
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* This gives you the opportunity to set authentication headers. The 401
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* status code will already be set.
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*
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* In this case of Bearer Auth, this would for example mean that the
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* following header needs to be set:
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*
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* $response->addHeader('WWW-Authenticate', 'Bearer realm=SabreDAV');
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*
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* Keep in mind that in the case of multiple authentication backends, other
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* WWW-Authenticate headers may already have been set, and you'll want to
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* append your own WWW-Authenticate header instead of overwriting the
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* existing one.
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*
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* @param RequestInterface $request
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* @param ResponseInterface $response
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* @return void
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*/
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function challenge(RequestInterface $request, ResponseInterface $response) {
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$auth = new HTTP\Auth\Bearer(
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$this->realm,
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$request,
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$response
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);
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$auth->requireLogin();
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}
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}
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