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[CORE] Add ActivityPub plugin

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This is not the same as the one in https://notabug.org/diogo/gnu-social-activitypub-plugin
Differences to the first "release"
-> Doesn't use guzzle nor has any composer dependencies
-> Supports HTTP Signatures
-> Has basic l10n/i18n
-> Some minor bug fixes
This commit is contained in:
Diogo Cordeiro
2019-05-11 12:27:21 +01:00
committed by Diogo Peralta Cordeiro
parent 6bf888b520
commit 2f1ddd8280
50 changed files with 7823 additions and 0 deletions
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86
plugins/ActivityPub/classes/Activitypub_accept.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_accept extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Accept
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array $object
* @return array pretty array to be used in a response
*/
public static function accept_to_array($object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => common_root_url().'accept_follow_from_'.urlencode($object['actor']).'_to_'.urlencode($object['object']),
'type' => 'Accept',
'actor' => $object['object'],
'object' => $object
];
return $res;
}
/**
* Verifies if a given object is acceptable for an Accept Activity.
*
* @param array $object
* @return bool
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function validate_object($object)
{
if (!is_array($object)) {
throw new Exception('Invalid Object Format for Accept Activity.');
}
if (!isset($object['type'])) {
throw new Exception('Object type was not specified for Accept Activity.');
}
switch ($object['type']) {
case 'Follow':
// Validate data
if (!filter_var($object['object'], FILTER_VALIDATE_URL)) {
throw new Exception("Object is not a valid Object URI for Activity.");
}
break;
default:
throw new Exception('This is not a supported Object Type for Accept Activity.');
}
return true;
}
}

57
plugins/ActivityPub/classes/Activitypub_announce.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_announce extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Announce
*
* @param $actor
* @param array $object
* @return array pretty array to be used in a response
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function announce_to_array($actor, $object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
"type" => "Announce",
"actor" => $actor,
"object" => $object
];
return $res;
}
}

67
plugins/ActivityPub/classes/Activitypub_attachment.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub Attachment representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_attachment extends Managed_DataObject
{
/**
* Generates a pretty array from an Attachment object
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Attachment $attachment
* @return array pretty array to be used in a response
*/
public static function attachment_to_array($attachment)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'type' => 'Document',
'mediaType' => $attachment->mimetype,
'url' => $attachment->getUrl(),
'size' => $attachment->getSize(),
'name' => $attachment->getTitle(),
];
// Image
if (substr($res["mediaType"], 0, 5) == "image") {
$res["meta"]= [
'width' => $attachment->width,
'height' => $attachment->height
];
}
return $res;
}
}

85
plugins/ActivityPub/classes/Activitypub_create.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_create extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Create
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $actor
* @param array $object
* @return array pretty array to be used in a response
*/
public static function create_to_array($actor, $object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => $object['id'].'/create',
'type' => 'Create',
'to' => $object['to'],
'cc' => $object['cc'],
'actor' => $actor,
'object' => $object
];
return $res;
}
/**
* Verifies if a given object is acceptable for a Create Activity.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array $object
* @throws Exception
*/
public static function validate_object($object)
{
if (!is_array($object)) {
throw new Exception('Invalid Object Format for Create Activity.');
}
if (!isset($object['type'])) {
throw new Exception('Object type was not specified for Create Activity.');
}
switch ($object['type']) {
case 'Note':
// Validate data
Activitypub_notice::validate_note($object);
break;
default:
throw new Exception('This is not a supported Object Type for Create Activity.');
}
}
}

58
plugins/ActivityPub/classes/Activitypub_delete.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_delete extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Delete
*
* @param $actor
* @param array $object
* @return array pretty array to be used in a response
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function delete_to_array($actor, $object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => $object.'/delete',
'type' => 'Delete',
'actor' => $actor,
'object' => $object
];
return $res;
}
}

53
plugins/ActivityPub/classes/Activitypub_error.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_error extends Managed_DataObject
{
/**
* Generates a pretty error from a string
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $m
* @return array pretty array to be used in a response
*/
public static function error_message_to_array($m)
{
$res = [
'error'=> $m
];
return $res;
}
}

91
plugins/ActivityPub/classes/Activitypub_follow.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_follow extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a subscription
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $actor
* @param string $object
* @return array pretty array to be used in a response
*/
public static function follow_to_array($actor, $object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => common_root_url().'follow_from_'.urlencode($actor).'_to_'.urlencode($object),
'type' => 'Follow',
'actor' => $actor,
'object' => $object
];
return $res;
}
/**
* Handles a Follow Activity received by our inbox.
*
* @param Profile $actor_profile Remote Actor
* @param string $object Local Actor
* @throws AlreadyFulfilledException
* @throws HTTP_Request2_Exception
* @throws NoProfileException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function follow($actor_profile, $object)
{
// Get Actor's Aprofile
$actor_aprofile = Activitypub_profile::from_profile($actor_profile);
// Get Object profile
$object_profile = new Activitypub_explorer;
$object_profile = $object_profile->lookup($object)[0];
if (!Subscription::exists($actor_profile, $object_profile)) {
Subscription::start($actor_profile, $object_profile);
common_debug('ActivityPubPlugin: Accepted Follow request from '.ActivityPubPlugin::actor_uri($actor_profile).' to '.$object);
} else {
common_debug('ActivityPubPlugin: Received a repeated Follow request from '.ActivityPubPlugin::actor_uri($actor_profile).' to '.$object);
}
// Notify remote instance that we have accepted their request
common_debug('ActivityPubPlugin: Notifying remote instance that we have accepted their Follow request request from '.ActivityPubPlugin::actor_uri($actor_profile).' to '.$object);
$postman = new Activitypub_postman($actor_profile, [$actor_aprofile]);
$postman->accept_follow();
}
}

58
plugins/ActivityPub/classes/Activitypub_like.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_like extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Like
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $actor Actor URI
* @param string $object Notice URI
* @return array pretty array to be used in a response
*/
public static function like_to_array($actor, $object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => common_root_url().'like_from_'.urlencode($actor).'_to_'.urlencode($object),
"type" => "Like",
"actor" => $actor,
"object" => $object
];
return $res;
}
}

57
plugins/ActivityPub/classes/Activitypub_mention_tag.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub Mention Tag representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_mention_tag extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Mention Tag
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $href Actor Uri
* @param array $name Mention name
* @return array pretty array to be used in a response
*/
public static function mention_tag_to_array_from_values($href, $name)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
"type" => "Mention",
"href" => $href,
"name" => $name
];
return $res;
}
}

252
plugins/ActivityPub/classes/Activitypub_notice.php Normal file
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub notice representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_notice extends Managed_DataObject
{
/**
* Generates a pretty notice from a Notice object
*
* @param Notice $notice
* @return array array to be used in a response
* @throws EmptyPkeyValueException
* @throws InvalidUrlException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function notice_to_array($notice)
{
$profile = $notice->getProfile();
$attachments = [];
foreach ($notice->attachments() as $attachment) {
$attachments[] = Activitypub_attachment::attachment_to_array($attachment);
}
$tags = [];
foreach ($notice->getTags() as $tag) {
if ($tag != "") { // Hacky workaround to avoid stupid outputs
$tags[] = Activitypub_tag::tag_to_array($tag);
}
}
$cc = [common_local_url('apActorFollowers', ['id' => $profile->getID()])];
foreach ($notice->getAttentionProfiles() as $to_profile) {
$cc[] = $href = $to_profile->getUri();
$tags[] = Activitypub_mention_tag::mention_tag_to_array_from_values($href, $to_profile->getNickname().'@'.parse_url($href, PHP_URL_HOST));
}
// In a world without walls and fences, we should make everything Public!
$to[]= 'https://www.w3.org/ns/activitystreams#Public';
$item = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => common_local_url('apNotice', ['id' => $notice->getID()]),
'type' => 'Note',
'published' => str_replace(' ', 'T', $notice->getCreated()).'Z',
'url' => $notice->getUrl(),
'attributedTo' => ActivityPubPlugin::actor_uri($profile),
'to' => ['https://www.w3.org/ns/activitystreams#Public'],
'cc' => $cc,
'atomUri' => $notice->getUrl(),
'conversation' => $notice->getConversationUrl(),
'content' => $notice->getRendered(),
'isLocal' => $notice->isLocal(),
'attachment' => $attachments,
'tag' => $tags
];
// Is this a reply?
if (!empty($notice->reply_to)) {
$item['inReplyTo'] = common_local_url('apNotice', ['id' => $notice->getID()]);
$item['inReplyToAtomUri'] = Notice::getById($notice->reply_to)->getUrl();
}
// Do we have a location for this notice?
try {
$location = Notice_location::locFromStored($notice);
$item['latitude'] = $location->lat;
$item['longitude'] = $location->lon;
} catch (Exception $e) {
// Apparently no.
}
return $item;
}
/**
* Create a Notice via ActivityPub Note Object.
* Returns created Notice.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array $object
* @param Profile|null $actor_profile
* @return Notice
* @throws Exception
*/
public static function create_notice($object, $actor_profile = null)
{
$id = $object['id']; // int
$url = $object['url']; // string
$content = $object['content']; // string
// possible keys: ['inReplyTo', 'latitude', 'longitude']
$settings = [];
if (isset($object['inReplyTo'])) {
$settings['inReplyTo'] = $object['inReplyTo'];
}
if (isset($object['latitude'])) {
$settings['latitude'] = $object['latitude'];
}
if (isset($object['longitude'])) {
$settings['longitude'] = $object['longitude'];
}
// Ensure Actor Profile
if (is_null($actor_profile)) {
$actor_profile = ActivityPub_explorer::get_profile_from_url($object['actor']);
}
$act = new Activity();
$act->verb = ActivityVerb::POST;
$act->time = time();
$act->actor = $actor_profile->asActivityObject();
$act->context = new ActivityContext();
$options = ['source' => 'ActivityPub', 'uri' => $id, 'url' => $url];
// Is this a reply?
if (isset($settings['inReplyTo'])) {
try {
$inReplyTo = ActivityPubPlugin::grab_notice_from_url($settings['inReplyTo']);
$act->context->replyToID = $inReplyTo->getUri();
$act->context->replyToUrl = $inReplyTo->getUrl();
} catch (Exception $e) {
// It failed to grab, maybe we got this note from another source
// (e.g.: OStatus) that handles this differently or we really
// failed to get it...
// Welp, nothing that we can do about, let's
// just fake we don't have such notice.
}
} else {
$inReplyTo = null;
}
// Mentions
$mentions = [];
if (isset($object['tag']) && is_array($object['tag'])) {
foreach ($object['tag'] as $tag) {
if ($tag['type'] == 'Mention') {
$mentions[] = $tag['href'];
}
}
}
$mentions_profiles = [];
$discovery = new Activitypub_explorer;
foreach ($mentions as $mention) {
try {
$mentions_profiles[] = $discovery->lookup($mention)[0];
} catch (Exception $e) {
// Invalid actor found, just let it go. // TODO: Fallback to OStatus
}
}
unset($discovery);
foreach ($mentions_profiles as $mp) {
$act->context->attention[ActivityPubPlugin::actor_uri($mp)] = 'http://activitystrea.ms/schema/1.0/person';
}
// Add location if that is set
if (isset($settings['latitude'], $settings['longitude'])) {
$act->context->location = Location::fromLatLon($settings['latitude'], $settings['longitude']);
}
/* Reject notice if it is too long (without the HTML)
if (Notice::contentTooLong($content)) {
throw new Exception('That\'s too long. Maximum notice size is %d character.');
}*/
$actobj = new ActivityObject();
$actobj->type = ActivityObject::NOTE;
$actobj->content = strip_tags($content, '<p><b><i><u><a><ul><ol><li>');
// Finally add the activity object to our activity
$act->objects[] = $actobj;
$note = Notice::saveActivity($act, $actor_profile, $options);
return $note;
}
/**
* Validates a note.
*
* @param array $object
* @return bool
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function validate_note($object)
{
if (!isset($object['attributedTo'])) {
common_debug('ActivityPub Notice Validator: Rejected because attributedTo was not specified.');
throw new Exception('No attributedTo specified.');
}
if (!isset($object['id'])) {
common_debug('ActivityPub Notice Validator: Rejected because Object ID was not specified.');
throw new Exception('Object ID not specified.');
} elseif (!filter_var($object['id'], FILTER_VALIDATE_URL)) {
common_debug('ActivityPub Notice Validator: Rejected because Object ID is invalid.');
throw new Exception('Invalid Object ID.');
}
if (!isset($object['type']) || $object['type'] !== 'Note') {
common_debug('ActivityPub Notice Validator: Rejected because of Type.');
throw new Exception('Invalid Object type.');
}
if (!isset($object['content'])) {
common_debug('ActivityPub Notice Validator: Rejected because Content was not specified.');
throw new Exception('Object content was not specified.');
}
if (!isset($object['url'])) {
throw new Exception('Object URL was not specified.');
} elseif (!filter_var($object['url'], FILTER_VALIDATE_URL)) {
common_debug('ActivityPub Notice Validator: Rejected because Object URL is invalid.');
throw new Exception('Invalid Object URL.');
}
if (!isset($object['cc'])) {
common_debug('ActivityPub Notice Validator: Rejected because Object CC was not specified.');
throw new Exception('Object CC was not specified.');
}
return true;
}
}

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub's Pending follow requests
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_pending_follow_requests extends Managed_DataObject
{
public $__table = 'activitypub_pending_follow_requests';
public $local_profile_id;
public $remote_profile_id;
private $_reldb = null;
/**
* Return table definition for Schema setup and DB_DataObject usage.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return array array of column definitions
*/
public static function schemaDef()
{
return [
'fields' => [
'local_profile_id' => ['type' => 'integer', 'not null' => true],
'remote_profile_id' => ['type' => 'integer', 'not null' => true],
'relation_id' => ['type' => 'serial', 'not null' => true],
],
'primary key' => ['relation_id'],
'foreign keys' => [
'activitypub_pending_follow_requests_local_profile_id_fkey' => ['profile', ['local_profile_id' => 'id']],
'activitypub_pending_follow_requests_remote_profile_id_fkey' => ['profile', ['remote_profile_id' => 'id']],
],
];
}
public function __construct($actor, $remote_actor)
{
$this->local_profile_id = $actor;
$this->remote_profile_id = $remote_actor;
}
/**
* Add Follow request to table.
*
* @return boolean true if added, false otherwise
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function add()
{
return !$this->exists() && $this->insert();
}
/**
* Check if a Follow request is pending.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return boolean true if is pending, false otherwise
*/
public function exists()
{
$this->_reldb = clone($this);
if ($this->_reldb->find() > 0) {
$this->_reldb->fetch();
return true;
}
return false;
}
/**
* Remove a request from the pending table.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return boolean true if removed, false otherwise
*/
public function remove()
{
return $this->exists() && $this->_reldb->delete();
}
}

476
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub Profile
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_profile extends Managed_DataObject
{
public $__table = 'activitypub_profile';
public $uri; // text() not_null
public $profile_id; // int(4) primary_key not_null
public $inboxuri; // text() not_null
public $sharedInboxuri; // text()
public $nickname; // varchar(64) multiple_key not_null
public $fullname; // text()
public $profileurl; // text()
public $homepage; // text()
public $bio; // text() multiple_key
public $location; // text()
public $created; // datetime() not_null default_CURRENT_TIMESTAMP
public $modified; // datetime() not_null default_CURRENT_TIMESTAMP
/**
* Return table definition for Schema setup and DB_DataObject usage.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return array array of column definitions
*/
public static function schemaDef()
{
return [
'fields' => [
'uri' => ['type' => 'text', 'not null' => true],
'profile_id' => ['type' => 'integer'],
'inboxuri' => ['type' => 'text', 'not null' => true],
'sharedInboxuri' => ['type' => 'text'],
'created' => ['type' => 'datetime', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was created'],
'modified' => ['type' => 'datetime', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was modified'],
],
'primary key' => ['profile_id'],
'foreign keys' => [
'activitypub_profile_profile_id_fkey' => ['profile', ['profile_id' => 'id']],
],
];
}
/**
* Generates a pretty profile from a Profile object
*
* @param Profile $profile
* @return array array to be used in a response
* @throws InvalidUrlException
* @throws ServerException
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function profile_to_array($profile)
{
$uri = ActivityPubPlugin::actor_uri($profile);
$id = $profile->getID();
$rsa = new Activitypub_rsa();
$public_key = $rsa->ensure_public_key($profile);
unset($rsa);
$res = [
'@context' => [
'https://www.w3.org/ns/activitystreams',
'https://w3id.org/security/v1',
[
'manuallyApprovesFollowers' => 'as:manuallyApprovesFollowers'
]
],
'id' => $uri,
'type' => 'Person',
'following' => common_local_url('apActorFollowing', ['id' => $id]),
'followers' => common_local_url('apActorFollowers', ['id' => $id]),
'liked' => common_local_url('apActorLiked', ['id' => $id]),
'inbox' => common_local_url('apInbox', ['id' => $id]),
'outbox' => common_local_url('apActorOutbox', ['id' => $id]),
'preferredUsername' => $profile->getNickname(),
'name' => $profile->getBestName(),
'summary' => ($desc = $profile->getDescription()) == null ? "" : $desc,
'url' => $profile->getUrl(),
'manuallyApprovesFollowers' => false,
'publicKey' => [
'id' => $uri."#public-key",
'owner' => $uri,
'publicKeyPem' => $public_key
],
'tag' => [],
'attachment' => [],
'icon' => [
'type' => 'Image',
'mediaType' => 'image/png',
'height' => AVATAR_PROFILE_SIZE,
'width' => AVATAR_PROFILE_SIZE,
'url' => $profile->avatarUrl(AVATAR_PROFILE_SIZE)
]
];
if ($profile->isLocal()) {
$res['endpoints']['sharedInbox'] = common_local_url('apInbox');
} else {
$aprofile = new Activitypub_profile();
$aprofile = $aprofile->from_profile($profile);
$res['endpoints']['sharedInbox'] = $aprofile->sharedInboxuri;
}
return $res;
}
/**
* Insert the current object variables into the database
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @access public
* @throws ServerException
*/
public function do_insert()
{
$profile = new Profile();
$profile->created = $this->created = $this->modified = common_sql_now();
$fields = [
'uri' => 'profileurl',
'nickname' => 'nickname',
'fullname' => 'fullname',
'bio' => 'bio'
];
foreach ($fields as $af => $pf) {
$profile->$pf = $this->$af;
}
$this->profile_id = $profile->insert();
if ($this->profile_id === false) {
$profile->query('ROLLBACK');
throw new ServerException('Profile insertion failed.');
}
$ok = $this->insert();
if ($ok === false) {
$profile->query('ROLLBACK');
$this->query('ROLLBACK');
throw new ServerException('Cannot save ActivityPub profile.');
}
}
/**
* Fetch the locally stored profile for this Activitypub_profile
*
* @return Profile
* @throws NoProfileException if it was not found
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function local_profile()
{
$profile = Profile::getKV('id', $this->profile_id);
if (!$profile instanceof Profile) {
throw new NoProfileException($this->profile_id);
}
return $profile;
}
/**
* Generates an Activitypub_profile from a Profile
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param Profile $profile
* @return Activitypub_profile
* @throws Exception if no Activitypub_profile exists for given Profile
*/
public static function from_profile(Profile $profile)
{
$profile_id = $profile->getID();
$aprofile = self::getKV('profile_id', $profile_id);
if (!$aprofile instanceof Activitypub_profile) {
// No Activitypub_profile for this profile_id,
if (!$profile->isLocal()) {
// create one!
$aprofile = self::create_from_local_profile($profile);
} else {
throw new Exception('No Activitypub_profile for Profile ID: '.$profile_id. ', this is a local user.');
}
}
$fields = [
'uri' => 'profileurl',
'nickname' => 'nickname',
'fullname' => 'fullname',
'bio' => 'bio'
];
foreach ($fields as $af => $pf) {
$aprofile->$af = $profile->$pf;
}
return $aprofile;
}
/**
* Given an existent local profile creates an ActivityPub profile.
* One must be careful not to give a user profile to this function
* as only remote users have ActivityPub_profiles on local instance
*
* @param Profile $profile
* @return Activitypub_profile
* @throws HTTP_Request2_Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
private static function create_from_local_profile(Profile $profile)
{
$aprofile = new Activitypub_profile();
$url = $profile->getUri();
$inboxes = Activitypub_explorer::get_actor_inboxes_uri($url);
if ($inboxes == null) {
throw new Exception('This is not an ActivityPub user thus AProfile is politely refusing to proceed.');
}
$aprofile->created = $aprofile->modified = common_sql_now();
$aprofile = new Activitypub_profile;
$aprofile->profile_id = $profile->getID();
$aprofile->uri = $url;
$aprofile->nickname = $profile->getNickname();
$aprofile->fullname = $profile->getFullname();
$aprofile->bio = substr($profile->getDescription(), 0, 1000);
$aprofile->inboxuri = $inboxes["inbox"];
$aprofile->sharedInboxuri = $inboxes["sharedInbox"];
$aprofile->insert();
return $aprofile;
}
/**
* Returns sharedInbox if possible, inbox otherwise
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return string Inbox URL
*/
public function get_inbox()
{
if (is_null($this->sharedInboxuri)) {
return $this->inboxuri;
}
return $this->sharedInboxuri;
}
/**
* Getter for uri property
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return string URI
*/
public function getUri()
{
return $this->uri;
}
/**
* Getter for url property
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return string URL
*/
public function getUrl()
{
return $this->getUri();
}
/**
* Getter for id property
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return int
*/
public function getID()
{
return $this->profile_id;
}
/**
* Ensures a valid Activitypub_profile when provided with a valid URI.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $url
* @return Activitypub_profile
* @throws Exception if it isn't possible to return an Activitypub_profile
*/
public static function fromUri($url)
{
try {
return self::from_profile(Activitypub_explorer::get_profile_from_url($url));
} catch (Exception $e) {
throw new Exception('No valid ActivityPub profile found for given URI.');
}
}
/**
* Look up, and if necessary create, an Activitypub_profile for the remote
* entity with the given webfinger address.
* This should never return null -- you will either get an object or
* an exception will be thrown.
*
* @author GNU social
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param string $addr webfinger address
* @return Activitypub_profile
* @throws Exception on error conditions
*/
public static function ensure_web_finger($addr)
{
// Normalize $addr, i.e. add 'acct:' if missing
$addr = Discovery::normalize($addr);
// Try the cache
$uri = self::cacheGet(sprintf('activitypub_profile:webfinger:%s', $addr));
if ($uri !== false) {
if (is_null($uri)) {
// Negative cache entry
// TRANS: Exception.
throw new Exception(_m('Not a valid webfinger address (via cache).'));
}
try {
return self::fromUri($uri);
} catch (Exception $e) {
common_log(LOG_ERR, sprintf(__METHOD__ . ': Webfinger address cache inconsistent with database, did not find Activitypub_profile uri==%s', $uri));
self::cacheSet(sprintf('activitypub_profile:webfinger:%s', $addr), false);
}
}
// Now, try some discovery
$disco = new Discovery();
try {
$xrd = $disco->lookup($addr);
} catch (Exception $e) {
// Save negative cache entry so we don't waste time looking it up again.
// @todo FIXME: Distinguish temporary failures?
self::cacheSet(sprintf('activitypub_profile:webfinger:%s', $addr), null);
// TRANS: Exception.
throw new Exception(_m('Not a valid webfinger address.'));
}
$hints = array_merge(
array('webfinger' => $addr),
DiscoveryHints::fromXRD($xrd)
);
// If there's an Hcard, let's grab its info
if (array_key_exists('hcard', $hints)) {
if (!array_key_exists('profileurl', $hints) ||
$hints['hcard'] != $hints['profileurl']) {
$hcardHints = DiscoveryHints::fromHcardUrl($hints['hcard']);
$hints = array_merge($hcardHints, $hints);
}
}
// If we got a profile page, try that!
$profileUrl = null;
if (array_key_exists('profileurl', $hints)) {
$profileUrl = $hints['profileurl'];
try {
common_log(LOG_INFO, "Discovery on acct:$addr with profile URL $profileUrl");
$aprofile = self::fromUri($hints['profileurl']);
self::cacheSet(sprintf('activitypub_profile:webfinger:%s', $addr), $aprofile->getUri());
return $aprofile;
} catch (Exception $e) {
common_log(LOG_WARNING, "Failed creating profile from profile URL '$profileUrl': " . $e->getMessage());
// keep looking
//
// @todo FIXME: This means an error discovering from profile page
// may give us a corrupt entry using the webfinger URI, which
// will obscure the correct page-keyed profile later on.
}
}
// XXX: try hcard
// XXX: try FOAF
// TRANS: Exception. %s is a webfinger address.
throw new Exception(sprintf(_m('Could not find a valid profile for "%s".'), $addr));
}
/**
* Update remote user profile in local instance
* Depends on do_update
*
* @param Activitypub_profile $aprofile
* @param array $res remote response
* @return Profile remote Profile object
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function update_profile($aprofile, $res)
{
// ActivityPub Profile
$aprofile->uri = $res['id'];
$aprofile->nickname = $res['preferredUsername'];
$aprofile->fullname = isset($res['name']) ? $res['name'] : null;
$aprofile->bio = isset($res['summary']) ? substr(strip_tags($res['summary']), 0, 1000) : null;
$aprofile->inboxuri = $res['inbox'];
$aprofile->sharedInboxuri = isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : $res['inbox'];
$profile = $aprofile->local_profile();
$profile->modified = $aprofile->modified = common_sql_now();
$fields = [
'uri' => 'profileurl',
'nickname' => 'nickname',
'fullname' => 'fullname',
'bio' => 'bio'
];
foreach ($fields as $af => $pf) {
$profile->$pf = $aprofile->$af;
}
// Profile
$profile->update();
$aprofile->update();
// Public Key
Activitypub_rsa::update_public_key($profile, $res['publicKey']['publicKeyPem']);
// Avatar
if (isset($res['icon']['url'])) {
try {
Activitypub_explorer::update_avatar($profile, $res['icon']['url']);
} catch (Exception $e) {
// Let the exception go, it isn't a serious issue
common_debug('An error ocurred while grabbing remote avatar'.$e->getMessage());
}
}
return $profile;
}
}

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_reject extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Reject
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array $object
* @return array pretty array to be used in a response
*/
public static function reject_to_array($object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'type' => 'Reject',
'object' => $object
];
return $res;
}
}

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub Keys System
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_rsa extends Managed_DataObject
{
public $__table = 'activitypub_rsa';
public $profile_id; // int(4) primary_key not_null
public $private_key; // text() not_null
public $public_key; // text() not_null
public $created; // datetime() not_null default_CURRENT_TIMESTAMP
public $modified; // datetime() not_null default_CURRENT_TIMESTAMP
/**
* Return table definition for Schema setup and DB_DataObject usage.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @return array array of column definitions
*/
public static function schemaDef()
{
return [
'fields' => [
'profile_id' => ['type' => 'integer'],
'private_key' => ['type' => 'text'],
'public_key' => ['type' => 'text', 'not null' => true],
'created' => ['type' => 'datetime', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was created'],
'modified' => ['type' => 'datetime', 'not null' => true, 'default' => 'CURRENT_TIMESTAMP', 'description' => 'date this record was modified'],
],
'primary key' => ['profile_id'],
'foreign keys' => [
'activitypub_profile_profile_id_fkey' => ['profile', ['profile_id' => 'id']],
],
];
}
public function get_private_key($profile)
{
$this->profile_id = $profile->getID();
$apRSA = self::getKV('profile_id', $this->profile_id);
if (!$apRSA instanceof Activitypub_rsa) {
// No existing key pair for this profile
if ($profile->isLocal()) {
self::generate_keys($this->private_key, $this->public_key);
$this->store_keys();
} else {
throw new Exception('This is a remote Profile, there is no Private Key for this Profile.');
}
}
return $apRSA->private_key;
}
/**
* Guarantees a Public Key for a given profile.
*
* @param Profile $profile
* @param bool $fetch
* @return string The public key
* @throws ServerException It should never occur, but if so, we break everything!
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public function ensure_public_key($profile, $fetch = true)
{
$this->profile_id = $profile->getID();
$apRSA = self::getKV('profile_id', $this->profile_id);
if (!$apRSA instanceof Activitypub_rsa) {
// No existing key pair for this profile
if ($profile->isLocal()) {
self::generate_keys($this->private_key, $this->public_key);
$this->store_keys();
} else {
// This should never happen, but try to recover!
if ($fetch) {
$res = Activitypub_explorer::get_remote_user_activity(ActivityPubPlugin::actor_uri($profile));
Activitypub_rsa::update_public_key($profile, $res['publicKey']['publicKeyPem']);
return self::ensure_public_key($profile, false);
} else {
throw new ServerException('Activitypub_rsa: Failed to find keys for given profile. That should have not happened!');
}
}
}
return $apRSA->public_key;
}
/**
* Insert the current object variables into the database.
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @access public
* @throws ServerException
*/
public function store_keys()
{
$this->created = $this->modified = common_sql_now();
$ok = $this->insert();
if ($ok === false) {
throw new ServerException('Cannot save ActivityPub RSA.');
}
}
/**
* Generates a pair of RSA keys.
*
* @author PHP Manual Contributed Notes <dirt@awoms.com>
* @param string $private_key in/out
* @param string $public_key in/out
*/
public static function generate_keys(&$private_key, &$public_key)
{
$config = [
'digest_alg' => 'sha512',
'private_key_bits' => 2048,
'private_key_type' => OPENSSL_KEYTYPE_RSA,
];
// Create the private and public key
$res = openssl_pkey_new($config);
// Extract the private key from $res to $private_key
openssl_pkey_export($res, $private_key);
// Extract the public key from $res to $pubKey
$pubKey = openssl_pkey_get_details($res);
$public_key = $pubKey["key"];
unset($pubKey);
}
/**
* Update public key.
*
* @param Profile $profile
* @param string $public_key
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function update_public_key($profile, $public_key)
{
// Public Key
$apRSA = new Activitypub_rsa();
$apRSA->profile_id = $profile->getID();
$apRSA->public_key = $public_key;
$apRSA->modified = common_sql_now();
if (!$apRSA->update()) {
$apRSA->insert();
}
}
}

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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub representation of a Tag
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_tag extends Managed_DataObject
{
/**
* Generates a pretty tag from a Tag object
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array Tag $tag
* @return array pretty array to be used in a response
*/
public static function tag_to_array($tag)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'name' => $tag,
'url' => common_local_url('tag', ['tag' => $tag])
];
return $res;
}
}

87
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<?php
// This file is part of GNU social - https://www.gnu.org/software/social
//
// GNU social is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GNU social is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
/**
* ActivityPub implementation for GNU social
*
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
* @link http://www.gnu.org/software/social/
*/
defined('GNUSOCIAL') || die();
/**
* ActivityPub error representation
*
* @category Plugin
* @package GNUsocial
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Activitypub_undo extends Managed_DataObject
{
/**
* Generates an ActivityPub representation of a Undo
*
* @author Diogo Cordeiro <diogo@fc.up.pt>
* @param array $object
* @return array pretty array to be used in a response
*/
public static function undo_to_array($object)
{
$res = [
'@context' => 'https://www.w3.org/ns/activitystreams',
'id' => $object['id'].'/undo',
'type' => 'Undo',
'actor' => $object['actor'],
'object' => $object
];
return $res;
}
/**
* Verifies if a given object is acceptable for a Undo Activity.
*
* @param array $object
* @return bool
* @throws Exception
* @author Diogo Cordeiro <diogo@fc.up.pt>
*/
public static function validate_object($object)
{
if (!is_array($object)) {
throw new Exception('Invalid Object Format for Undo Activity.');
}
if (!isset($object['type'])) {
throw new Exception('Object type was not specified for Undo Activity.');
}
switch ($object['type']) {
case 'Follow':
case 'Like':
// Validate data
if (!filter_var($object['object'], FILTER_VALIDATE_URL)) {
throw new Exception('Object is not a valid Object URI for Activity.');
}
break;
default:
throw new Exception('This is not a supported Object Type for Undo Activity.');
}
return true;
}
}