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| 1 | <?php |
| 2 | /** |
| 3 | * Copyright (C) 2018-2019 Kunal Mehta <legoktm@debian.org> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <https://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | namespace MediaWiki\SecureLinkFixer; |
| 20 | |
| 21 | use DateTime; |
| 22 | use RuntimeException; |
| 23 | use Wikimedia\StaticArrayWriter; |
| 24 | |
| 25 | /** |
| 26 | * Downloads Mozilla's HSTS preload list and builds it into a PHP file. |
| 27 | * |
| 28 | * We explicitly don't use any MediaWiki code so that this class |
| 29 | * can be run without needing all of MediaWiki to be installed. The |
| 30 | * only exception right now is the StaticArrayWriter class. |
| 31 | */ |
| 32 | class ListFetcher { |
| 33 | /** @var ?callable */ |
| 34 | private $output; |
| 35 | |
| 36 | private const HTTP_OPTIONS = [ |
| 37 | 'http' => [ 'method' => 'GET', 'header' => [ 'User-Agent: MediaWiki SecureLinkFixer' ] ] |
| 38 | ]; |
| 39 | |
| 40 | /** |
| 41 | * @param callable|null $output |
| 42 | */ |
| 43 | public function __construct( ?callable $output = null ) { |
| 44 | $this->output = $output; |
| 45 | } |
| 46 | |
| 47 | /** |
| 48 | * @param string $text |
| 49 | */ |
| 50 | private function output( $text ) { |
| 51 | if ( $this->output ) { |
| 52 | ( $this->output )( $text ); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Fetches the latest revision/date available from GitHub mozilla-firefox/firefox |
| 58 | * |
| 59 | * @return string[] |
| 60 | */ |
| 61 | public function getLatestInfo(): array { |
| 62 | // phpcs:ignore Generic.Files.LineLength |
| 63 | $changesUrl = 'https://api.github.com/repos/mozilla-firefox/firefox/commits?sha=main&per_page=1&path=security%2Fmanager%2Fssl%2FnsSTSPreloadList.inc'; |
| 64 | $json = json_decode( |
| 65 | file_get_contents( |
| 66 | $changesUrl, |
| 67 | false, |
| 68 | stream_context_create( self::HTTP_OPTIONS ) |
| 69 | ) |
| 70 | ); |
| 71 | |
| 72 | if ( !isset( $json[0]->sha ) ) { |
| 73 | throw new RuntimeException( "Unable to parse revision id/updated date for HSTS preload list" ); |
| 74 | } |
| 75 | |
| 76 | $rev = $json[0]->sha; |
| 77 | $date = new DateTime( $json[0]->commit->author->date ); |
| 78 | return [ $rev, $date->format( 'Y-m-d' ) ]; |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * Downloads the list for the given revision/date and formats it for PHP |
| 83 | * |
| 84 | * @param string $rev git revision |
| 85 | * @param string $date YYYY-MM-DD formatted date |
| 86 | * @return string PHP file code |
| 87 | */ |
| 88 | public function fetchList( $rev, $date ) { |
| 89 | $this->output( "Downloading the HSTS preload list (revision $rev)..." ); |
| 90 | // phpcs:ignore Generic.Files.LineLength |
| 91 | $url = "https://github.com/mozilla-firefox/firefox/raw/{$rev}/security/manager/ssl/nsSTSPreloadList.inc"; |
| 92 | $lines = explode( "\n", |
| 93 | file_get_contents( |
| 94 | $url, |
| 95 | false, |
| 96 | stream_context_create( self::HTTP_OPTIONS ) |
| 97 | ) |
| 98 | ); |
| 99 | $this->output( "done\n" ); |
| 100 | $inList = false; |
| 101 | $header = <<<HEADER |
| 102 | Generated by fetchList.php using mozilla-firefox/firefox@$rev ($date) |
| 103 | This Source Code Form is subject to the terms of the Mozilla Public |
| 104 | License, v. 2.0. If a copy of the MPL was not distributed with this |
| 105 | file, You can obtain one at https://mozilla.org/MPL/2.0/. |
| 106 | phpcs:ignoreFile |
| 107 | HEADER; |
| 108 | |
| 109 | // XXX: Should we care about gPreloadListExpirationTime? |
| 110 | $data = []; |
| 111 | foreach ( $lines as $line ) { |
| 112 | if ( $line === '%%' ) { |
| 113 | $inList = !$inList; |
| 114 | continue; |
| 115 | } |
| 116 | |
| 117 | if ( $inList ) { |
| 118 | $exploded = explode( ', ', $line ); |
| 119 | $data[$exploded[0]] = (int)$exploded[1]; |
| 120 | } |
| 121 | } |
| 122 | $writer = new StaticArrayWriter(); |
| 123 | return $writer->create( $data, $header ); |
| 124 | } |
| 125 | } |