consumer.php

简介：IceBB是一个强大

        return false;
    }

    /**
     * @access private
     */
    function _doIdRes($message, $endpoint, $return_to)
    {
        // Checks for presence of appropriate fields (and checks
        // signed list fields)
        $result = $this->_idResCheckForFields($message);

        if (Auth_OpenID::isFailure($result)) {
            return $result;
        }

        if (!$this->_checkReturnTo($message, $return_to)) {
            return new Auth_OpenID_FailureResponse(null,
            sprintf("return_to does not match return URL. Expected %s, got %s",
                    $return_to,
                    $message->getArg(Auth_OpenID_OPENID_NS, 'return_to')));
        }

        // Verify discovery information:
        $result = $this->_verifyDiscoveryResults($message, $endpoint);

        if (Auth_OpenID::isFailure($result)) {
            return $result;
        }

        $endpoint = $result;

        $result = $this->_idResCheckSignature($message,
                                              $endpoint->server_url);

        if (Auth_OpenID::isFailure($result)) {
            return $result;
        }

        $result = $this->_idResCheckNonce($message, $endpoint);

        if (Auth_OpenID::isFailure($result)) {
            return $result;
        }

        $signed_list_str = $message->getArg(Auth_OpenID_OPENID_NS, 'signed',
                                            Auth_OpenID_NO_DEFAULT);
        $signed_list = explode(',', $signed_list_str);

        $signed_fields = Auth_OpenID::addPrefix($signed_list, "openid.");

        return new Auth_OpenID_SuccessResponse($endpoint, $message,
                                               $signed_fields);

    }

    /**
     * @access private
     */
    function _checkReturnTo($message, $return_to)
    {
        // Check an OpenID message and its openid.return_to value
        // against a return_to URL from an application.  Return True
        // on success, False on failure.

        // Check the openid.return_to args against args in the
        // original message.
        $result = Auth_OpenID_GenericConsumer::_verifyReturnToArgs(
                                           $message->toPostArgs());
        if (Auth_OpenID::isFailure($result)) {
            return false;
        }

        // Check the return_to base URL against the one in the
        // message.
        $msg_return_to = $message->getArg(Auth_OpenID_OPENID_NS,
                                          'return_to');

        $return_to_parts = parse_url($return_to);
        $msg_return_to_parts = parse_url($msg_return_to);

        // If port is absent from both, add it so it's equal in the
        // check below.
        if ((!array_key_exists('port', $return_to_parts)) &&
            (!array_key_exists('port', $msg_return_to_parts))) {
            $return_to_parts['port'] = null;
            $msg_return_to_parts['port'] = null;
        }

        // If path is absent from both, add it so it's equal in the
        // check below.
        if ((!array_key_exists('path', $return_to_parts)) &&
            (!array_key_exists('path', $msg_return_to_parts))) {
            $return_to_parts['path'] = null;
            $msg_return_to_parts['path'] = null;
        }

        // The URL scheme, authority, and path MUST be the same
        // between the two URLs.
        foreach (array('scheme', 'host', 'port', 'path') as $component) {
            // If the url component is absent in either URL, fail.
            // There should always be a scheme, host, port, and path.
            if (!array_key_exists($component, $return_to_parts)) {
                return false;
            }

            if (!array_key_exists($component, $msg_return_to_parts)) {
                return false;
            }

            if (Auth_OpenID::arrayGet($return_to_parts, $component) !==
                Auth_OpenID::arrayGet($msg_return_to_parts, $component)) {
                return false;
            }
        }

        return true;
    }

    /**
     * @access private
     */
    function _verifyReturnToArgs($query)
    {
        // Verify that the arguments in the return_to URL are present in this
        // response.

        $message = Auth_OpenID_Message::fromPostArgs($query);
        $return_to = $message->getArg(Auth_OpenID_OPENID_NS, 'return_to');

        // XXX: this should be checked by _idResCheckForFields
        if (!$return_to) {
            return new Auth_OpenID_FailureResponse(null,
                           "Response has no return_to");
        }

        $parsed_url = parse_url($return_to);

        $q = array();
        if (array_key_exists('query', $parsed_url)) {
            $rt_query = $parsed_url['query'];
            $q = Auth_OpenID::parse_str($rt_query);
        }

        foreach ($q as $rt_key => $rt_value) {
            if (!array_key_exists($rt_key, $query)) {
                return new Auth_OpenID_FailureResponse(null,
                  sprintf("return_to parameter %s absent from query", $rt_key));
            } else {
                $value = $query[$rt_key];
                if ($rt_value != $value) {
                    return new Auth_OpenID_FailureResponse(null,
                      sprintf("parameter %s value %s does not match " .
                              "return_to value %s", $rt_key,
                              $value, $rt_value));
                }
            }
        }

        // Make sure all non-OpenID arguments in the response are also
        // in the signed return_to.
        $bare_args = $message->getArgs(Auth_OpenID_BARE_NS);
        foreach ($bare_args as $key => $value) {
            if (Auth_OpenID::arrayGet($q, $key) != $value) {
                return new Auth_OpenID_FailureResponse(null,
                  sprintf("Parameter %s = %s not in return_to URL",
                          $key, $value));
            }
        }

        return true;
    }

    /**
     * @access private
     */
    function _idResCheckSignature($message, $server_url)
    {
        $assoc_handle = $message->getArg(Auth_OpenID_OPENID_NS,
                                         'assoc_handle');

        $assoc = $this->store->getAssociation($server_url, $assoc_handle);

        if ($assoc) {
            if ($assoc->getExpiresIn() <= 0) {
                // XXX: It might be a good idea sometimes to re-start
                // the authentication with a new association. Doing it
                // automatically opens the possibility for
                // denial-of-service by a server that just returns
                // expired associations (or really short-lived
                // associations)
                return new Auth_OpenID_FailureResponse(null,
                             'Association with ' . $server_url . ' expired');
            }

            if (!$assoc->checkMessageSignature($message)) {
                return new Auth_OpenID_FailureResponse(null,
                                                       "Bad signature");
            }
        } else {
            // It's not an association we know about.  Stateless mode
            // is our only possible path for recovery.  XXX - async
            // framework will not want to block on this call to
            // _checkAuth.
            if (!$this->_checkAuth($message, $server_url)) {
                return new Auth_OpenID_FailureResponse(null,
                             "Server denied check_authentication");
            }
        }

        return null;
    }

    /**
     * @access private
     */
    function _verifyDiscoveryResults($message, $endpoint=null)
    {
        if ($message->getOpenIDNamespace() == Auth_OpenID_OPENID2_NS) {
            return $this->_verifyDiscoveryResultsOpenID2($message,
                                                         $endpoint);
        } else {
            return $this->_verifyDiscoveryResultsOpenID1($message,
                                                         $endpoint);
        }
    }

    /**
     * @access private
     */
    function _verifyDiscoveryResultsOpenID1($message, $endpoint)
    {
        $claimed_id = $message->getArg(Auth_OpenID_BARE_NS,
                                $this->openid1_return_to_identifier_name);

        if (($endpoint === null) && ($claimed_id === null)) {
            return new Auth_OpenID_FailureResponse($endpoint,
              'When using OpenID 1, the claimed ID must be supplied, ' .
              'either by passing it through as a return_to parameter ' .
              'or by using a session, and supplied to the GenericConsumer ' .
              'as the argument to complete()');
        } else if (($endpoint !== null) && ($claimed_id === null)) {
            $claimed_id = $endpoint->claimed_id;
        }

        $to_match = new Auth_OpenID_ServiceEndpoint();
        $to_match->type_uris = array(Auth_OpenID_TYPE_1_1);
        $to_match->local_id = $message->getArg(Auth_OpenID_OPENID1_NS,
                                               'identity');

        // Restore delegate information from the initiation phase
        $to_match->claimed_id = $claimed_id;

        if ($to_match->local_id === null) {
            return new Auth_OpenID_FailureResponse($endpoint,
                         "Missing required field openid.identity");
        }

        $to_match_1_0 = $to_match->copy();
        $to_match_1_0->type_uris = array(Auth_OpenID_TYPE_1_0);

        if ($endpoint !== null) {
            $result = $this->_verifyDiscoverySingle($endpoint, $to_match);

            if (is_a($result, 'Auth_OpenID_TypeURIMismatch')) {
                $result = $this->_verifyDiscoverySingle($endpoint,
                                                        $to_match_1_0);
            }

            if (Auth_OpenID::isFailure($result)) {
                // oidutil.log("Error attempting to use stored
                //             discovery information: " + str(e))
                //             oidutil.log("Attempting discovery to
                //             verify endpoint")
            } else {
                return $endpoint;
            }
        }

        // Endpoint is either bad (failed verification) or None
        $result = $this->_discoverAndVerify($to_match);

        if (is_a($result, 'Auth_OpenID_TypeURIMismatch')) {
            return $this->_discoverAndVerify($to_match_1_0);
        } else {
            return $result;
        }
    }

    /**
     * @access private
     */
    function _verifyDiscoverySingle($endpoint, $to_match)
    {
        // Every type URI that's in the to_match endpoint has to be
        // present in the discovered endpoint.
        foreach ($to_match->type_uris as $type_uri) {
            if (!$endpoint->usesExtension($type_uri)) {
                return new Auth_OpenID_TypeURIMismatch($endpoint,
                             "Required type ".$type_uri." not present");
            }
        }

        // Fragments do not influence discovery, so we can't compare a
        // claimed identifier with a fragment to discovered
        // information.
        list($defragged_claimed_id, $_) =
            Auth_OpenID::urldefrag($to_match->claimed_id);

        if ($defragged_claimed_id != $endpoint->claimed_id) {
            return new Auth_OpenID_FailureResponse($endpoint,
              sprintf('Claimed ID does not match (different subjects!), ' .
                      'Expected %s, got %s', $defragged_claimed_id,
                      $endpoint->claimed_id));
        }

        if ($to_match->getLocalID() != $endpoint->getLocalID()) {
            return new Auth_OpenID_FailureResponse($endpoint,
              sprintf('local_id mismatch. Expected %s, got %s',
                      $to_match->getLocalID(), $endpoint->getLocalID()));
        }

        // If the server URL is None, this must be an OpenID 1
        // response, because op_endpoint is a required parameter in
        // OpenID 2. In that case, we don't actually care what the
        // discovered server_url is, because signature checking or
        // check_auth should take care of that check for us.
        if ($to_match->server_url === null) {
            if ($to_match->preferredNamespace() != Auth_OpenID_OPENID1_NS) {
                return new Auth_OpenID_FailureResponse($endpoint,
                             "Preferred namespace mismatch (bug)");
            }
        } else if ($to_match->server_url != $endpoint->server_url) {
            return new Auth_OpenID_FailureResponse($endpoint,
              sprintf('OP Endpoint mismatch. Expected %s, got %s',
                      $to_match->server_url, $endpoint->server_url));
        }

        return null;
    }

    /**
     * @access private
     */
    function _verifyDiscoveryResultsOpenID2($message, $endpoint)
    {
        $to_match = new Auth_OpenID_ServiceEndpoint();
        $to_match->type_uris = array(Auth_OpenID_TYPE_2_0);
        $to_match->claimed_id = $message->getArg(Auth_OpenID_OPENID2_NS,
                                                 'claimed_id');

        $to_match->local_id = $message->getArg(Auth_OpenID_OPENID2_NS,
                                                'identity');

        $to_match->server_url = $message->getArg(Auth_OpenID_OPENID2_NS,
                                                 'op_endpoint');

        if ($to_match->server_url === null) {
            return new Auth_OpenID_FailureResponse($endpoint,
                         "OP Endpoint URL missing");
        }

        // claimed_id and identifier must both be present or both be
        // absent
        if (($to_match->claimed_id === null) &&
            ($to_match->local_id !== null)) {
            return new Auth_OpenID_FailureResponse($endpoint,
              'openid.identity is present without openid.claimed_id');
        }