3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2010, StatusNet, Inc.
6 * A sample module to show best practices for StatusNet plugins
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU Affero General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU Affero General Public License for more details.
20 * You should have received a copy of the GNU Affero General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 * @author James Walker <james@status.net>
25 * @copyright 2010 StatusNet, Inc.
26 * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
27 * @link http://status.net/
31 const REL_SALMON = 'salmon';
32 const REL_MENTIONED = 'mentioned';
34 // XXX: these are deprecated
35 const NS_REPLIES = "http://salmon-protocol.org/ns/salmon-replies";
36 const NS_MENTIONS = "http://salmon-protocol.org/ns/salmon-mention";
39 * Sign and post the given Atom entry as a Salmon message.
41 * Side effects: may generate a keypair on-demand for the given user,
42 * which can be very slow on some systems.
44 * @param string $endpoint_uri
45 * @param string $xml string representation of payload
46 * @param Profile $actor local user profile whose keys to sign with
47 * @return boolean success
49 public function post($endpoint_uri, $xml, Profile $actor)
51 if (empty($endpoint_uri)) {
52 common_debug('No endpoint URI for Salmon post to '.$actor->getUri());
57 $envelope = $this->createMagicEnv($xml, $actor);
58 } catch (Exception $e) {
59 common_log(LOG_ERR, "Salmon unable to sign: " . $e->getMessage());
63 $headers = array('Content-Type: application/magic-envelope+xml');
66 $client = new HTTPClient();
67 $client->setBody($envelope);
68 $response = $client->post($endpoint_uri, $headers);
69 } catch (HTTP_Request2_Exception $e) {
70 common_log(LOG_ERR, "Salmon ($class) post to $endpoint_uri failed: " . $e->getMessage());
73 if ($response->getStatus() != 200) {
74 common_log(LOG_ERR, "Salmon ($class) at $endpoint_uri returned status " .
75 $response->getStatus() . ': ' . $response->getBody());
84 * Encode the given string as a signed MagicEnvelope XML document,
85 * using the keypair for the given local user profile.
87 * Side effects: will create and store a keypair on-demand if one
88 * hasn't already been generated for this user. This can be very slow
91 * @param string $text XML fragment to sign, assumed to be Atom
92 * @param Profile $actor Profile of a local user to use as signer
94 * @return string XML string representation of magic envelope
96 * @throws Exception on bad profile input or key generation problems
97 * @fixme if signing fails, this seems to return the original text without warning. Is there a reason for this?
99 public function createMagicEnv($text, $actor)
101 $magic_env = new MagicEnvelope();
103 // We only generate keys for our local users of course, so let
104 // getUser throw an exception if the profile is not local.
105 $user = $actor->getUser();
107 // Find already stored key
108 $magicsig = Magicsig::getKV('user_id', $user->id);
109 if (!$magicsig instanceof Magicsig) {
110 // No keypair yet, let's generate one.
111 $magicsig = new Magicsig();
112 $magicsig->generate($user->id);
116 $env = $magic_env->signMessage($text, 'application/atom+xml', $magicsig->toString());
117 } catch (Exception $e) {
120 return $magic_env->toXML($env);
124 * Check if the given magic envelope is well-formed and correctly signed.
125 * Needs to have network access to fetch public keys over the web if not
126 * already stored locally.
128 * Side effects: exceptions and caching updates may occur during network
131 * @param string $text XML fragment of magic envelope
134 * @throws Exception on bad profile input or key generation problems
135 * @fixme could hit fatal errors or spew output on invalid XML
137 public function verifyMagicEnv($text)
139 $magic_env = new MagicEnvelope();
141 $env = $magic_env->parse($text);
143 return $magic_env->verify($env);