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| CrlDistributionPointsExtractor | |
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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * SPDX-FileCopyrightText: 2026 LibreCode coop and contributors |
| 7 | * SPDX-License-Identifier: AGPL-3.0-or-later |
| 8 | */ |
| 9 | |
| 10 | namespace OCA\Libresign\Service\Crl; |
| 11 | |
| 12 | final class CrlDistributionPointsExtractor { |
| 13 | /** @var array<string, true> */ |
| 14 | private const array ACCEPTED_EXTENSION_NAMES = [ |
| 15 | 'crldistributionpoints' => true, |
| 16 | 'x509v3 crl distribution points' => true, |
| 17 | '2.5.29.31' => true, |
| 18 | ]; |
| 19 | |
| 20 | private const string URI_PATTERN = '/URI\s*:\s*([^\s\n]+)/i'; |
| 21 | |
| 22 | /** |
| 23 | * @param array<array-key, mixed> $extensions |
| 24 | * @return array{hasExtension: bool, urls: list<string>} |
| 25 | */ |
| 26 | public function extractFromExtensions(array $extensions): array { |
| 27 | $hasCrlExtension = false; |
| 28 | $orderedUrls = []; |
| 29 | $seenUrls = []; |
| 30 | foreach ($extensions as $extensionName => $extensionValue) { |
| 31 | if (!is_string($extensionName)) { |
| 32 | continue; |
| 33 | } |
| 34 | |
| 35 | $normalizedName = strtolower(trim($extensionName)); |
| 36 | if (!isset(self::ACCEPTED_EXTENSION_NAMES[$normalizedName])) { |
| 37 | continue; |
| 38 | } |
| 39 | $hasCrlExtension = true; |
| 40 | |
| 41 | if (is_string($extensionValue)) { |
| 42 | $this->appendUrlsFromText($extensionValue, $orderedUrls, $seenUrls); |
| 43 | } elseif (is_array($extensionValue)) { |
| 44 | foreach ($extensionValue as $extensionPart) { |
| 45 | if (is_string($extensionPart)) { |
| 46 | $this->appendUrlsFromText($extensionPart, $orderedUrls, $seenUrls); |
| 47 | } |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | if (!$hasCrlExtension) { |
| 53 | return ['hasExtension' => false, 'urls' => []]; |
| 54 | } |
| 55 | |
| 56 | return [ |
| 57 | 'hasExtension' => true, |
| 58 | 'urls' => $orderedUrls, |
| 59 | ]; |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * @param list<string> $orderedUrls |
| 64 | * @param array<string, true> $seenUrls |
| 65 | */ |
| 66 | private function appendUrlsFromText(string $value, array &$orderedUrls, array &$seenUrls): void { |
| 67 | if (stripos($value, 'URI') === false) { |
| 68 | return; |
| 69 | } |
| 70 | |
| 71 | preg_match_all(self::URI_PATTERN, $value, $matches); |
| 72 | if (empty($matches[1])) { |
| 73 | return; |
| 74 | } |
| 75 | |
| 76 | foreach ($matches[1] as $url) { |
| 77 | $normalizedUrl = $this->normalizeUrlToken($url); |
| 78 | if ($normalizedUrl === '' || isset($seenUrls[$normalizedUrl])) { |
| 79 | continue; |
| 80 | } |
| 81 | |
| 82 | $seenUrls[$normalizedUrl] = true; |
| 83 | $orderedUrls[] = $normalizedUrl; |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | private function normalizeUrlToken(string $url): string { |
| 88 | return rtrim($url, ')]'); |
| 89 | } |
| 90 | } |