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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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179
plugins/ActivityPub/classes/Activitypub_rsa.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 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();
}
}
}