141 lines
4.8 KiB
PHP
Executable File
141 lines
4.8 KiB
PHP
Executable File
<?php
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/**
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* GNU social - a federating social network
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*
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* ActivityPubPlugin implementation for GNU Social
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Plugin
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* @package GNUsocial
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @author Daniel Supernault <danielsupernault@gmail.com>
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* @copyright 2018 Free Software Foundation http://fsf.org
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link https://www.gnu.org/software/social/
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*/
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if (!defined('GNUSOCIAL')) {
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exit(1);
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}
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/**
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* ActivityPub Keys System
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*
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* @category Plugin
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* @package GNUsocial
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://www.gnu.org/software/social/
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*/
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class Activitypub_rsa extends Managed_DataObject
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{
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public $__table = 'Activitypub_rsa';
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/**
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* Return table definition for Schema setup and DB_DataObject usage.
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @return array array of column definitions
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*/
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public static function schemaDef()
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{
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return [
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'fields' => [
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'profile_id' => ['type' => 'integer'],
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'private_key' => ['type' => 'varchar', 'length' => 191],
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'public_key' => ['type' => 'varchar', 'length' => 191],
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'created' => ['type' => 'datetime', 'not null' => true],
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'modified' => ['type' => 'datetime', 'not null' => true],
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],
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'primary key' => ['profile_id'],
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'unique keys' => [
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'Activitypub_rsa_profile_id_key' => ['profile_id'],
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'Activitypub_rsa_private_key_key' => ['private_key'],
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'Activitypub_rsa_public_key_key' => ['public_key'],
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],
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'foreign keys' => [
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'Activitypub_profile_profile_id_fkey' => ['profile', ['profile_id' => 'id']],
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],
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];
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}
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/**
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* Guarantees a Public Key for a given profile.
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @param Profile $profile
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* @return string The public key
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* @throws Exception It should never occur
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*/
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public function ensure_public_key($profile)
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{
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$this->profile_id = $profile->getID();
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$apRSA = self::getKV('profile_id', $this->profile_id);
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if (!$apRSA instanceof Activitypub_rsa) {
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// No existing key pair for this profile
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if ($profile->isLocal()) {
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self::generate_keys($this->private_key, $this->public_key);
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$this->store_keys();
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} else {
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throw new Exception('No Keys for this Profile. That\'s odd.');
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}
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}
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return $apRSA->public_key;
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}
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/**
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* Insert the current object variables into the database.
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*
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* @author Diogo Cordeiro <diogo@fc.up.pt>
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* @access public
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* @throws ServerException
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*/
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public function store_keys()
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{
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$this->created = $this->modified = common_sql_now();
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$ok = $this->insert();
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if ($ok === false) {
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$profile->query('ROLLBACK');
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throw new ServerException('Cannot save ActivityPub RSA.');
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}
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}
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/**
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* Generates a pair of RSA keys.
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*
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* @author PHP Manual Contributed Notes <dirt@awoms.com>
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* @param string $private_key in/out
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* @param string $public_key in/out
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*/
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public static function generate_keys(&$private_key, &$public_key)
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{
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$config = [
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'digest_alg' => 'sha512',
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'private_key_bits' => 2048,
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'private_key_type' => OPENSSL_KEYTYPE_RSA,
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];
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// Create the private and public key
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$res = openssl_pkey_new($config);
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// Extract the private key from $res to $private_key
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openssl_pkey_export($res, $private_key);
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// Extract the public key from $res to $pubKey
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$pubKey = openssl_pkey_get_details($res);
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$public_key = $pubKey["key"];
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unset($pubKey);
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}
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}
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