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<?php
/**
 * Copyright (c) 2011, 2012 Michiel de Jong <michiel@unhosted.org>
 * This file is licensed under the Affero General Public License version 3 or
 * later.
 * See the COPYING-README file.
 */


class OC_Connector_Sabre_Auth_ro_oauth extends Sabre_DAV_Auth_Backend_AbstractBasic {
	private $validTokens;
	private $category;
	public function __construct($validTokensArg, $categoryArg) {
		$this->validTokens = $validTokensArg;
		$this->category = $categoryArg;
	}

	/**
	 * Validates a username and password
	 *
	 * This method should return true or false depending on if login
	 * succeeded.
	 *
	 * @return bool
	 */
	protected function validateUserPass($username, $password){
		//always give read-only:
		if(($_SERVER['REQUEST_METHOD'] == 'OPTIONS')
		    || (isset($this->validTokens[$password]))
			|| (($_SERVER['REQUEST_METHOD'] == 'GET') && ($this->category == 'public'))
		) {
			OC_Util::setUpFS();
			return true;
		} else {
			//var_export($_SERVER);
			//var_export($this->validTokens);
			//die('not getting in with "'.$username.'"/"'.$password.'"!');
			return false;	
		}
	}

	//overwriting this to make it not automatically fail if no auth header is found:
	public function authenticate(Sabre_DAV_Server $server,$realm) {
		$auth = new Sabre_HTTP_BearerAuth();
		$auth->setHTTPRequest($server->httpRequest);
		$auth->setHTTPResponse($server->httpResponse);
		$auth->setRealm($realm);
		$userpass = $auth->getUserPass();
		if (!$userpass) {
			if(($_SERVER['REQUEST_METHOD'] == 'OPTIONS')
				||(($_SERVER['REQUEST_METHOD'] == 'GET') && ($this->category == 'public'))
			) {
				$userpass = array('', '');
			} else {
				$auth->requireLogin();
				throw new Sabre_DAV_Exception_NotAuthenticated('No basic authentication headers were found');
			}
		}

		// Authenticates the user
		if (!$this->validateUserPass($userpass[0],$userpass[1])) {
			$auth->requireLogin();
			throw new Sabre_DAV_Exception_NotAuthenticated('Username or password does not match');
		}
		$this->currentUser = $userpass[0];
		return true;
	}

}