19993337372

Committed 06 Dec 2025 07:39PM UTC coverage: 42.664%. First build

Build # 19993337372

Build Type

Pull #6012

github

Committed by

web-flow

Commit Message

Merge 352bc1328 into 9de3c9f7e

Pull Request Pull Request #6012: Feat/docmdp iso validation

Run Details

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70.43

/lib/Handler/SignEngine/Pkcs12Handler.php

<?php

declare(strict_types=1);
/**
 * SPDX-FileCopyrightText: 2020-2024 LibreCode coop and contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace OCA\Libresign\Handler\SignEngine;

use DateTime;
use OCA\Libresign\AppInfo\Application;
use OCA\Libresign\Exception\LibresignException;
use OCA\Libresign\Handler\CertificateEngine\CertificateEngineFactory;
use OCA\Libresign\Handler\CertificateEngine\OrderCertificatesTrait;
use OCA\Libresign\Handler\DocMdpHandler;
use OCA\Libresign\Handler\FooterHandler;
use OCA\Libresign\Service\CaIdentifierService;
use OCA\Libresign\Service\FolderService;
use OCP\Files\File;
use OCP\IAppConfig;
use OCP\IL10N;
use OCP\ITempManager;
use phpseclib3\File\ASN1;
use Psr\Log\LoggerInterface;

class Pkcs12Handler extends SignEngineHandler {
        use OrderCertificatesTrait;
        protected string $certificate = '';
        private array $signaturesFromPoppler = [];
        private ?JSignPdfHandler $jSignPdfHandler = null;
        private string $rootCertificatePem = '';
        private bool $isLibreSignFile = false;

        public function __construct(
                private FolderService $folderService,
                private IAppConfig $appConfig,
                protected CertificateEngineFactory $certificateEngineFactory,
                private IL10N $l10n,
                private FooterHandler $footerHandler,
                private ITempManager $tempManager,
                private LoggerInterface $logger,
                private CaIdentifierService $caIdentifierService,
                private DocMdpHandler $docMdpHandler,
        ) {
                parent::__construct($l10n, $folderService, $logger);
        }

        /**
         * @throws LibresignException When is not a signed file
         */
        private function getSignatures($resource): iterable {
                rewind($resource);
                $content = stream_get_contents($resource);
                preg_match_all(
                        '/ByteRange\s*\[\s*(?<offset1>\d+)\s+(?<length1>\d+)\s+(?<offset2>\d+)\s+(?<length2>\d+)\s*\]/',
                        $content,
                        $bytes
                );
                if (empty($bytes['offset1']) || empty($bytes['length1']) || empty($bytes['offset2']) || empty($bytes['length2'])) {
                        throw new LibresignException($this->l10n->t('Unsigned file.'));
                }

                for ($i = 0; $i < count($bytes['offset1']); $i++) {
                        $offset1 = (int)$bytes['offset1'][$i];
                        $length1 = (int)$bytes['length1'][$i];
                        $offset2 = (int)$bytes['offset2'][$i];

                        $signatureStart = $offset1 + $length1 + 1;
                        $signatureLength = $offset2 - $signatureStart - 1;

                        rewind($resource);

                        $signature = stream_get_contents($resource, $signatureLength, $signatureStart);
                        if ($signature === false) {
                                yield null;
                                continue;
                        }

                        $decodedSignature = @hex2bin($signature);
                        if ($decodedSignature === false) {
                                yield null;
                                continue;
                        }
                        yield $decodedSignature;
                }

                $this->tempManager->clean();
        }

        public function setIsLibreSignFile(): void {
                $this->isLibreSignFile = true;
        }

        /**
         * @param resource $resource
         * @throws LibresignException When is not a signed file
         * @return array
         */
        #[\Override]
        public function getCertificateChain($resource): array {
                $certificates = [];

                foreach ($this->getSignatures($resource) as $signature) {
                        $certificates[] = $this->processSignature($resource, $signature);
                }
                return $certificates;
        }

        private function processSignature($resource, ?string $signature): array {
                $result = [];

                if (!$signature) {
                        $result['chain'][0]['signature_validation'] = $this->getReadableSigState('Digest Mismatch.');
                        return $result;
                }

                $decoded = ASN1::decodeBER($signature);
                $result = $this->extractTimestampData($decoded, $result);

                $chain = $this->extractCertificateChain($signature);
                if (!empty($chain)) {
                        $result['chain'] = $this->orderCertificates($chain);
                        $result = $this->enrichLeafWithPopplerData($resource, $result);
                }

                $result = $this->extractDocMdpData($resource, $result);

                $result = $this->applyLibreSignRootCAFlag($result);
                return $result;
        }

        private function applyLibreSignRootCAFlag(array $signer): array {
                if (empty($signer['chain'])) {
                        return $signer;
                }

                foreach ($signer['chain'] as $key => $cert) {
                        if ($cert['isLibreSignRootCA']
                                && $cert['certificate_validation']['id'] !== 1
                        ) {
                                $signer['chain'][$key]['certificate_validation'] = [
                                        'id' => 1,
                                        'label' => $this->l10n->t('Certificate is trusted.'),
                                ];
                        }
                }

                return $signer;
        }


        private function extractDocMdpData($resource, array $result): array {
                if (empty($result['chain'])) {
                        return $result;
                }

                $docMdpData = $this->docMdpHandler->extractDocMdpData($resource);
                return array_merge($result, $docMdpData);
        }

        private function extractTimestampData(array $decoded, array $result): array {
                $tsa = new TSA();

                try {
                        $timestampData = $tsa->extract($decoded);
                        if (!empty($timestampData['genTime']) || !empty($timestampData['policy']) || !empty($timestampData['serialNumber'])) {
                                $result['timestamp'] = $timestampData;
                        }
                } catch (\Throwable $e) {
                }

                if (!isset($result['signingTime']) || !$result['signingTime'] instanceof \DateTime) {
                        $result['signingTime'] = $tsa->getSigninTime($decoded);
                }
                return $result;
        }

        private function extractCertificateChain(string $signature): array {
                $pkcs7PemSignature = $this->der2pem($signature);
                $pemCertificates = [];

                if (!openssl_pkcs7_read($pkcs7PemSignature, $pemCertificates)) {
                        return [];
                }

                $chain = [];
                $isLibreSignRootCA = false;
                $certificateEngine = $this->getCertificateEngine();

                foreach ($pemCertificates as $index => $pemCertificate) {
                        $parsed = $certificateEngine->parseCertificate($pemCertificate);
                        if ($parsed) {
                                $parsed['signature_validation'] = [
                                        'id' => 1,
                                        'label' => $this->l10n->t('Signature is valid.'),
                                ];
                                if (!$isLibreSignRootCA) {
                                        $isLibreSignRootCA = $this->isLibreSignRootCA($pemCertificate, $parsed);
                                }
                                $parsed['isLibreSignRootCA'] = $isLibreSignRootCA;
                                $chain[$index] = $parsed;
                        }
                }
                if ($isLibreSignRootCA || $this->isLibreSignFile) {
                        foreach ($chain as &$cert) {
                                $cert['isLibreSignRootCA'] = true;
                        }
                }

                return $chain;
        }

        private function isLibreSignRootCA(string $certificate, array $parsed): bool {
                $rootCertificatePem = $this->getRootCertificatePem();
                if (empty($rootCertificatePem)) {
                        return false;
                }

                $rootFingerprint = openssl_x509_fingerprint($rootCertificatePem, 'sha256');
                $fingerprint = openssl_x509_fingerprint($certificate, 'sha256');
                if ($rootFingerprint === $fingerprint) {
                        return true;
                }

                return $this->hasLibreSignCaId($parsed);
        }

        private function hasLibreSignCaId(array $parsed): bool {
                $instanceId = $this->appConfig->getValueString(Application::APP_ID, 'instance_id', '');
                if (strlen($instanceId) !== 10 || !isset($parsed['subject']['OU'])) {
                        return false;
                }

                $organizationalUnits = $parsed['subject']['OU'];
                if (is_string($organizationalUnits)) {
                        $organizationalUnits = [$organizationalUnits];
                }

                foreach ($organizationalUnits as $ou) {
                        $ou = trim($ou);
                        if ($this->caIdentifierService->isValidCaId($ou, $instanceId)) {
                                return true;
                        }
                }

                return false;
        }

        private function getRootCertificatePem(): string {
                if (!empty($this->rootCertificatePem)) {
                        return $this->rootCertificatePem;
                }
                $configPath = $this->appConfig->getValueString(Application::APP_ID, 'config_path');
                if (empty($configPath)
                        || !is_dir($configPath)
                        || !is_readable($configPath . DIRECTORY_SEPARATOR . 'ca.pem')
                ) {
                        return '';
                }
                $rootCertificatePem = file_get_contents($configPath . DIRECTORY_SEPARATOR . 'ca.pem');
                if ($rootCertificatePem === false) {
                        return '';
                }
                $this->rootCertificatePem = $rootCertificatePem;
                return $this->rootCertificatePem;
        }

        private function enrichLeafWithPopplerData($resource, array $result): array {
                if (empty($result['chain'])) {
                        return $result;
                }

                $popplerOnlyFields = ['field', 'range', 'certificate_validation'];
                if (!isset($result['chain'][0]['subject'])) {
                        return $result;
                }
                $needPoppler = false;
                foreach ($popplerOnlyFields as $field) {
                        if (empty($result['chain'][0][$field])) {
                                $needPoppler = true;
                                break;
                        }
                }
                if (!isset($result['chain'][0]['signature_validation']) || $result['chain'][0]['signature_validation']['id'] !== 1) {
                        $needPoppler = true;
                }
                if (!$needPoppler) {
                        return $result;
                }
                $popplerChain = $this->chainFromPoppler($result['chain'][0]['subject'], $resource);
                if (empty($popplerChain)) {
                        return $result;
                }
                foreach ($popplerOnlyFields as $field) {
                        if (isset($popplerChain[$field])) {
                                $result['chain'][0][$field] = $popplerChain[$field];
                        }
                }
                if (!isset($result['chain'][0]['signature_validation']) || $result['chain'][0]['signature_validation']['id'] !== 1) {
                        if (isset($popplerChain['signature_validation'])) {
                                $result['chain'][0]['signature_validation'] = $popplerChain['signature_validation'];
                        }
                }
                return $result;
        }

        private function chainFromPoppler(array $subject, $resource): array {
                $fromFallback = $this->popplerUtilsPdfSignFallback($resource);
                foreach ($fromFallback as $popplerSig) {
                        if (!isset($popplerSig['chain'][0]['subject'])) {
                                continue;
                        }
                        if ($popplerSig['chain'][0]['subject'] == $subject) {
                                return $popplerSig['chain'][0];
                        }
                }
                return [];
        }

        private function popplerUtilsPdfSignFallback($resource): array {
                if (!empty($this->signaturesFromPoppler)) {
                        return $this->signaturesFromPoppler;
                }
                if (shell_exec('which pdfsig') === null) {
                        return $this->signaturesFromPoppler;
                }
                rewind($resource);
                $content = stream_get_contents($resource);
                $tempFile = $this->tempManager->getTemporaryFile('file.pdf');
                file_put_contents($tempFile, $content);

                $content = shell_exec('env TZ=UTC pdfsig ' . $tempFile);
                if (empty($content)) {
                        return $this->signaturesFromPoppler;
                }
                $lines = explode("\n", $content);

                $lastSignature = 0;
                foreach ($lines as $item) {
                        $isFirstLevel = preg_match('/^Signature\s#(\d)/', $item, $match);
                        if ($isFirstLevel) {
                                $lastSignature = (int)$match[1] - 1;
                                $this->signaturesFromPoppler[$lastSignature] = [];
                                continue;
                        }

                        $match = [];
                        $isSecondLevel = preg_match('/^\s+-\s(?<key>.+):\s(?<value>.*)/', $item, $match);
                        if ($isSecondLevel) {
                                switch ((string)$match['key']) {
                                        case 'Signing Time':
                                                $this->signaturesFromPoppler[$lastSignature]['signingTime'] = DateTime::createFromFormat('M d Y H:i:s', $match['value'], new \DateTimeZone('UTC'));
                                                break;
                                        case 'Signer full Distinguished Name':
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['subject'] = $this->parseDistinguishedNameWithMultipleValues($match['value']);
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['name'] = $match['value'];
                                                break;
                                        case 'Signing Hash Algorithm':
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['signatureTypeSN'] = $match['value'];
                                                break;
                                        case 'Signature Validation':
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['signature_validation'] = $this->getReadableSigState($match['value']);
                                                break;
                                        case 'Certificate Validation':
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['certificate_validation'] = $this->getReadableCertState($match['value']);
                                                break;
                                        case 'Signed Ranges':
                                                if (preg_match('/\[(\d+) - (\d+)\], \[(\d+) - (\d+)\]/', $match['value'], $ranges)) {
                                                        $this->signaturesFromPoppler[$lastSignature]['chain'][0]['range'] = [
                                                                'offset1' => (int)$ranges[1],
                                                                'length1' => (int)$ranges[2],
                                                                'offset2' => (int)$ranges[3],
                                                                'length2' => (int)$ranges[4],
                                                        ];
                                                }
                                                break;
                                        case 'Signature Field Name':
                                                $this->signaturesFromPoppler[$lastSignature]['chain'][0]['field'] = $match['value'];
                                                break;
                                        case 'Signature Validation':
                                        case 'Signature Type':
                                        case 'Total document signed':
                                        case 'Not total document signed':
                                        default:
                                                break;
                                }
                        }
                }
                return $this->signaturesFromPoppler;
        }

        private function getReadableSigState(string $status) {
                return match ($status) {
                        'Signature is Valid.' => [
                                'id' => 1,
                                'label' => $this->l10n->t('Signature is valid.'),
                        ],
                        'Signature is Invalid.' => [
                                'id' => 2,
                                'label' => $this->l10n->t('Signature is invalid.'),
                        ],
                        'Digest Mismatch.' => [
                                'id' => 3,
                                'label' => $this->l10n->t('Digest mismatch.'),
                        ],
                        "Document isn't signed or corrupted data." => [
                                'id' => 4,
                                'label' => $this->l10n->t("Document isn't signed or corrupted data."),
                        ],
                        'Signature has not yet been verified.' => [
                                'id' => 5,
                                'label' => $this->l10n->t('Signature has not yet been verified.'),
                        ],
                        default => [
                                'id' => 6,
                                'label' => $this->l10n->t('Unknown validation failure.'),
                        ],
                };
        }


        private function getReadableCertState(string $status) {
                return match ($status) {
                        'Certificate is Trusted.' => [
                                'id' => 1,
                                'label' => $this->l10n->t('Certificate is trusted.'),
                        ],
                        "Certificate issuer isn't Trusted." => [
                                'id' => 2,
                                'label' => $this->l10n->t("Certificate issuer isn't trusted."),
                        ],
                        'Certificate issuer is unknown.' => [
                                'id' => 3,
                                'label' => $this->l10n->t('Certificate issuer is unknown.'),
                        ],
                        'Certificate has been Revoked.' => [
                                'id' => 4,
                                'label' => $this->l10n->t('Certificate has been revoked.'),
                        ],
                        'Certificate has Expired' => [
                                'id' => 5,
                                'label' => $this->l10n->t('Certificate has expired'),
                        ],
                        'Certificate has not yet been verified.' => [
                                'id' => 6,
                                'label' => $this->l10n->t('Certificate has not yet been verified.'),
                        ],
                        default => [
                                'id' => 7,
                                'label' => $this->l10n->t('Unknown issue with Certificate or corrupted data.')
                        ],
                };
        }


        private function parseDistinguishedNameWithMultipleValues(string $dn): array {
                $result = [];
                $pairs = preg_split('/,(?=(?:[^"]*"[^"]*")*[^"]*$)/', $dn);

                foreach ($pairs as $pair) {
                        [$key, $value] = explode('=', $pair, 2);
                        if (empty($key) || empty($value)) {
                                return $result;
                        }
                        $key = trim($key);
                        $value = trim($value);
                        $value = trim($value, '"');

                        if (!isset($result[$key])) {
                                $result[$key] = $value;
                        } else {
                                if (!is_array($result[$key])) {
                                        $result[$key] = [$result[$key]];
                                }
                                $result[$key][] = $value;
                        }
                }

                return $result;
        }

        private function der2pem($derData) {
                $pem = chunk_split(base64_encode((string)$derData), 64, "\n");
                $pem = "-----BEGIN CERTIFICATE-----\n" . $pem . "-----END CERTIFICATE-----\n";
                return $pem;
        }

        private function getHandler(): SignEngineHandler {
                $sign_engine = $this->appConfig->getValueString(Application::APP_ID, 'sign_engine', 'JSignPdf');
                $property = lcfirst($sign_engine) . 'Handler';
                if (!property_exists($this, $property)) {
                        throw new LibresignException($this->l10n->t('Invalid Sign engine.'), 400);
                }
                $classHandler = 'OCA\\Libresign\\Handler\\SignEngine\\' . ucfirst($property);
                if (!$this->$property instanceof $classHandler) {
                        $this->$property = \OCP\Server::get($classHandler);
                }
                return $this->$property;
        }

        #[\Override]
        public function sign(): File {
                $this->beforeSign();

                $signedContent = $this->getHandler()
                        ->setCertificate($this->getCertificate())
                        ->setInputFile($this->getInputFile())
                        ->setPassword($this->getPassword())
                        ->setSignatureParams($this->getSignatureParams())
                        ->setVisibleElements($this->getVisibleElements())
                        ->getSignedContent();
                $this->getInputFile()->putContent($signedContent);
                return $this->getInputFile();
        }

        public function isHandlerOk(): bool {
                return $this->certificateEngineFactory->getEngine()->isSetupOk();
        }
}

1	<?php
2
3	declare(strict_types=1);
4	/**
5	* SPDX-FileCopyrightText: 2020-2024 LibreCode coop and contributors
6	* SPDX-License-Identifier: AGPL-3.0-or-later
7	*/
8
9	namespace OCA\Libresign\Handler\SignEngine;
10
11	use DateTime;
12	use OCA\Libresign\AppInfo\Application;
13	use OCA\Libresign\Exception\LibresignException;
14	use OCA\Libresign\Handler\CertificateEngine\CertificateEngineFactory;
15	use OCA\Libresign\Handler\CertificateEngine\OrderCertificatesTrait;
16	use OCA\Libresign\Handler\DocMdpHandler;
17	use OCA\Libresign\Handler\FooterHandler;
18	use OCA\Libresign\Service\CaIdentifierService;
19	use OCA\Libresign\Service\FolderService;
20	use OCP\Files\File;
21	use OCP\IAppConfig;
22	use OCP\IL10N;
23	use OCP\ITempManager;
24	use phpseclib3\File\ASN1;
25	use Psr\Log\LoggerInterface;
26
27	class Pkcs12Handler extends SignEngineHandler {
28	use OrderCertificatesTrait;
29	protected string $certificate = '';
30	private array $signaturesFromPoppler = [];
31	private ?JSignPdfHandler $jSignPdfHandler = null;
32	private string $rootCertificatePem = '';
33	private bool $isLibreSignFile = false;
34
35	public function __construct(
36	private FolderService $folderService,
37	private IAppConfig $appConfig,
38	protected CertificateEngineFactory $certificateEngineFactory,
39	private IL10N $l10n,
40	private FooterHandler $footerHandler,
41	private ITempManager $tempManager,
42	private LoggerInterface $logger,
43	private CaIdentifierService $caIdentifierService,
44	private DocMdpHandler $docMdpHandler,
45	) {
46	parent::__construct($l10n, $folderService, $logger);	52✔
47	}
48
49	/**
50	* @throws LibresignException When is not a signed file
51	*/
52	private function getSignatures($resource): iterable {
53	rewind($resource);	7✔
54	$content = stream_get_contents($resource);	7✔
55	preg_match_all(	7✔
56	'/ByteRange\s\[\s(?<offset1>\d+)\s+(?<length1>\d+)\s+(?<offset2>\d+)\s+(?<length2>\d+)\s*\]/',	7✔
57	$content,	7✔
58	$bytes	7✔
59	);	7✔
60	if (empty($bytes['offset1']) \|\| empty($bytes['length1']) \|\| empty($bytes['offset2']) \|\| empty($bytes['length2'])) {	7✔
61	throw new LibresignException($this->l10n->t('Unsigned file.'));	4✔
62	}
63
64	for ($i = 0; $i < count($bytes['offset1']); $i++) {	3✔
65	$offset1 = (int)$bytes['offset1'][$i];	3✔
66	$length1 = (int)$bytes['length1'][$i];	3✔
67	$offset2 = (int)$bytes['offset2'][$i];	3✔
68
69	$signatureStart = $offset1 + $length1 + 1;	3✔
70	$signatureLength = $offset2 - $signatureStart - 1;	3✔
71
72	rewind($resource);	3✔
73
74	$signature = stream_get_contents($resource, $signatureLength, $signatureStart);	3✔
75	if ($signature === false) {	3✔
76	yield null;	×
77	continue;	×
78	}
79
80	$decodedSignature = @hex2bin($signature);	3✔
81	if ($decodedSignature === false) {	3✔
82	yield null;	1✔
83	continue;	1✔
84	}
85	yield $decodedSignature;	2✔
86	}
87
88	$this->tempManager->clean();	3✔
89	}
90
91	public function setIsLibreSignFile(): void {
92	$this->isLibreSignFile = true;	×
93	}
94
95	/**
96	* @param resource $resource
97	* @throws LibresignException When is not a signed file
98	* @return array
99	*/
100	#[\Override]
101	public function getCertificateChain($resource): array {
102	$certificates = [];	7✔
103
104	foreach ($this->getSignatures($resource) as $signature) {	7✔
105	$certificates[] = $this->processSignature($resource, $signature);	3✔
106	}
107	return $certificates;	3✔
108	}
109
110	private function processSignature($resource, ?string $signature): array {
111	$result = [];	3✔
112
113	if (!$signature) {	3✔
114	$result['chain'][0]['signature_validation'] = $this->getReadableSigState('Digest Mismatch.');	1✔
115	return $result;	1✔
116	}
117
118	$decoded = ASN1::decodeBER($signature);	2✔
119	$result = $this->extractTimestampData($decoded, $result);	2✔
120
121	$chain = $this->extractCertificateChain($signature);	2✔
122	if (!empty($chain)) {	2✔
123	$result['chain'] = $this->orderCertificates($chain);	2✔
124	$result = $this->enrichLeafWithPopplerData($resource, $result);	2✔
125	}
126
127	$result = $this->extractDocMdpData($resource, $result);	2✔
128
129	$result = $this->applyLibreSignRootCAFlag($result);	2✔
130	return $result;	2✔
131	}
132
133	private function applyLibreSignRootCAFlag(array $signer): array {
134	if (empty($signer['chain'])) {	2✔
135	return $signer;	×
136	}
137
138	foreach ($signer['chain'] as $key => $cert) {	2✔
139	if ($cert['isLibreSignRootCA']	2✔
140	&& $cert['certificate_validation']['id'] !== 1	2✔
141	) {
142	$signer['chain'][$key]['certificate_validation'] = [	×
143	'id' => 1,	×
144	'label' => $this->l10n->t('Certificate is trusted.'),	×
145	];	×
146	}
147	}
148
149	return $signer;	2✔
150	}
151
152
153	private function extractDocMdpData($resource, array $result): array {
154	if (empty($result['chain'])) {	2✔
NEW 155	return $result;	×
156	}
157
158	$docMdpData = $this->docMdpHandler->extractDocMdpData($resource);	2✔
159	return array_merge($result, $docMdpData);	2✔
160	}
161
162	private function extractTimestampData(array $decoded, array $result): array {
163	$tsa = new TSA();	2✔
164
165	try {
166	$timestampData = $tsa->extract($decoded);	2✔
167	if (!empty($timestampData['genTime']) \|\| !empty($timestampData['policy']) \|\| !empty($timestampData['serialNumber'])) {	2✔
168	$result['timestamp'] = $timestampData;	2✔
169	}
170	} catch (\Throwable $e) {	×
171	}
172
173	if (!isset($result['signingTime']) \|\| !$result['signingTime'] instanceof \DateTime) {	2✔
174	$result['signingTime'] = $tsa->getSigninTime($decoded);	2✔
175	}
176	return $result;	2✔
177	}
178
179	private function extractCertificateChain(string $signature): array {
180	$pkcs7PemSignature = $this->der2pem($signature);	2✔
181	$pemCertificates = [];	2✔
182
183	if (!openssl_pkcs7_read($pkcs7PemSignature, $pemCertificates)) {	2✔
184	return [];	×
185	}
186
187	$chain = [];	2✔
188	$isLibreSignRootCA = false;	2✔
189	$certificateEngine = $this->getCertificateEngine();	2✔
190
191	foreach ($pemCertificates as $index => $pemCertificate) {	2✔
192	$parsed = $certificateEngine->parseCertificate($pemCertificate);	2✔
193	if ($parsed) {	2✔
194	$parsed['signature_validation'] = [	2✔
195	'id' => 1,	2✔
196	'label' => $this->l10n->t('Signature is valid.'),	2✔
197	];	2✔
198	if (!$isLibreSignRootCA) {	2✔
199	$isLibreSignRootCA = $this->isLibreSignRootCA($pemCertificate, $parsed);	2✔
200	}
201	$parsed['isLibreSignRootCA'] = $isLibreSignRootCA;	2✔
202	$chain[$index] = $parsed;	2✔
203	}
204	}
205	if ($isLibreSignRootCA \|\| $this->isLibreSignFile) {	2✔
206	foreach ($chain as &$cert) {	×
207	$cert['isLibreSignRootCA'] = true;	×
208	}
209	}
210
211	return $chain;	2✔
212	}
213
214	private function isLibreSignRootCA(string $certificate, array $parsed): bool {
215	$rootCertificatePem = $this->getRootCertificatePem();	2✔
216	if (empty($rootCertificatePem)) {	2✔
217	return false;	2✔
218	}
219
220	$rootFingerprint = openssl_x509_fingerprint($rootCertificatePem, 'sha256');	×
221	$fingerprint = openssl_x509_fingerprint($certificate, 'sha256');	×
222	if ($rootFingerprint === $fingerprint) {	×
223	return true;	×
224	}
225
226	return $this->hasLibreSignCaId($parsed);	×
227	}
228
229	private function hasLibreSignCaId(array $parsed): bool {
230	$instanceId = $this->appConfig->getValueString(Application::APP_ID, 'instance_id', '');	×
231	if (strlen($instanceId) !== 10 \|\| !isset($parsed['subject']['OU'])) {	×
232	return false;	×
233	}
234
235	$organizationalUnits = $parsed['subject']['OU'];	×
236	if (is_string($organizationalUnits)) {	×
237	$organizationalUnits = [$organizationalUnits];	×
238	}
239
240	foreach ($organizationalUnits as $ou) {	×
241	$ou = trim($ou);	×
242	if ($this->caIdentifierService->isValidCaId($ou, $instanceId)) {	×
243	return true;	×
244	}
245	}
246
247	return false;	×
248	}
249
250	private function getRootCertificatePem(): string {
251	if (!empty($this->rootCertificatePem)) {	2✔
252	return $this->rootCertificatePem;	×
253	}
254	$configPath = $this->appConfig->getValueString(Application::APP_ID, 'config_path');	2✔
255	if (empty($configPath)	2✔
256	\|\| !is_dir($configPath)	2✔
257	\|\| !is_readable($configPath . DIRECTORY_SEPARATOR . 'ca.pem')	2✔
258	) {
259	return '';	2✔
260	}
261	$rootCertificatePem = file_get_contents($configPath . DIRECTORY_SEPARATOR . 'ca.pem');	×
262	if ($rootCertificatePem === false) {	×
263	return '';	×
264	}
265	$this->rootCertificatePem = $rootCertificatePem;	×
266	return $this->rootCertificatePem;	×
267	}
268
269	private function enrichLeafWithPopplerData($resource, array $result): array {
270	if (empty($result['chain'])) {	2✔
271	return $result;	×
272	}
273
274	$popplerOnlyFields = ['field', 'range', 'certificate_validation'];	2✔
275	if (!isset($result['chain'][0]['subject'])) {	2✔
276	return $result;	×
277	}
278	$needPoppler = false;	2✔
279	foreach ($popplerOnlyFields as $field) {	2✔
280	if (empty($result['chain'][0][$field])) {	2✔
281	$needPoppler = true;	2✔
282	break;	2✔
283	}
284	}
285	if (!isset($result['chain'][0]['signature_validation']) \|\| $result['chain'][0]['signature_validation']['id'] !== 1) {	2✔
286	$needPoppler = true;	×
287	}
288	if (!$needPoppler) {	2✔
289	return $result;	×
290	}
291	$popplerChain = $this->chainFromPoppler($result['chain'][0]['subject'], $resource);	2✔
292	if (empty($popplerChain)) {	2✔
293	return $result;	2✔
294	}
295	foreach ($popplerOnlyFields as $field) {	×
296	if (isset($popplerChain[$field])) {	×
297	$result['chain'][0][$field] = $popplerChain[$field];	×
298	}
299	}
300	if (!isset($result['chain'][0]['signature_validation']) \|\| $result['chain'][0]['signature_validation']['id'] !== 1) {	×
301	if (isset($popplerChain['signature_validation'])) {	×
302	$result['chain'][0]['signature_validation'] = $popplerChain['signature_validation'];	×
303	}
304	}
305	return $result;	×
306	}
307
308	private function chainFromPoppler(array $subject, $resource): array {
309	$fromFallback = $this->popplerUtilsPdfSignFallback($resource);	2✔
310	foreach ($fromFallback as $popplerSig) {	2✔
311	if (!isset($popplerSig['chain'][0]['subject'])) {	2✔
312	continue;	×
313	}
314	if ($popplerSig['chain'][0]['subject'] == $subject) {	2✔
315	return $popplerSig['chain'][0];	×
316	}
317	}
318	return [];	2✔
319	}
320
321	private function popplerUtilsPdfSignFallback($resource): array {
322	if (!empty($this->signaturesFromPoppler)) {	2✔
323	return $this->signaturesFromPoppler;	1✔
324	}
325	if (shell_exec('which pdfsig') === null) {	1✔
326	return $this->signaturesFromPoppler;	×
327	}
328	rewind($resource);	1✔
329	$content = stream_get_contents($resource);	1✔
330	$tempFile = $this->tempManager->getTemporaryFile('file.pdf');	1✔
331	file_put_contents($tempFile, $content);	1✔
332
333	$content = shell_exec('env TZ=UTC pdfsig ' . $tempFile);	1✔
334	if (empty($content)) {	1✔
335	return $this->signaturesFromPoppler;	×
336	}
337	$lines = explode("\n", $content);	1✔
338
339	$lastSignature = 0;	1✔
340	foreach ($lines as $item) {	1✔
341	$isFirstLevel = preg_match('/^Signature\s#(\d)/', $item, $match);	1✔
342	if ($isFirstLevel) {	1✔
343	$lastSignature = (int)$match[1] - 1;	1✔
344	$this->signaturesFromPoppler[$lastSignature] = [];	1✔
345	continue;	1✔
346	}
347
348	$match = [];	1✔
349	$isSecondLevel = preg_match('/^\s+-\s(?<key>.+):\s(?<value>.*)/', $item, $match);	1✔
350	if ($isSecondLevel) {	1✔
351	switch ((string)$match['key']) {	1✔
352	case 'Signing Time':	1✔
353	$this->signaturesFromPoppler[$lastSignature]['signingTime'] = DateTime::createFromFormat('M d Y H:i:s', $match['value'], new \DateTimeZone('UTC'));	1✔
354	break;	1✔
355	case 'Signer full Distinguished Name':	1✔
356	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['subject'] = $this->parseDistinguishedNameWithMultipleValues($match['value']);	1✔
357	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['name'] = $match['value'];	1✔
358	break;	1✔
359	case 'Signing Hash Algorithm':	1✔
360	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['signatureTypeSN'] = $match['value'];	1✔
361	break;	1✔
362	case 'Signature Validation':	1✔
363	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['signature_validation'] = $this->getReadableSigState($match['value']);	1✔
364	break;	1✔
365	case 'Certificate Validation':	1✔
366	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['certificate_validation'] = $this->getReadableCertState($match['value']);	1✔
367	break;	1✔
368	case 'Signed Ranges':	1✔
369	if (preg_match('/\[(\d+) - (\d+)\], \[(\d+) - (\d+)\]/', $match['value'], $ranges)) {	1✔
370	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['range'] = [	1✔
371	'offset1' => (int)$ranges[1],	1✔
372	'length1' => (int)$ranges[2],	1✔
373	'offset2' => (int)$ranges[3],	1✔
374	'length2' => (int)$ranges[4],	1✔
375	];	1✔
376	}
377	break;	1✔
378	case 'Signature Field Name':	1✔
379	$this->signaturesFromPoppler[$lastSignature]['chain'][0]['field'] = $match['value'];	1✔
380	break;	1✔
381	case 'Signature Validation':	1✔
382	case 'Signature Type':	1✔
383	case 'Total document signed':	1✔
384	case 'Not total document signed':	1✔
385	default:
386	break;	1✔
387	}
388	}
389	}
390	return $this->signaturesFromPoppler;	1✔
391	}
392
393	private function getReadableSigState(string $status) {
394	return match ($status) {	2✔
395	'Signature is Valid.' => [	1✔
396	'id' => 1,	1✔
397	'label' => $this->l10n->t('Signature is valid.'),	1✔
398	],	1✔
399	'Signature is Invalid.' => [	×
400	'id' => 2,	×
401	'label' => $this->l10n->t('Signature is invalid.'),	×
402	],	×
403	'Digest Mismatch.' => [	1✔
404	'id' => 3,	1✔
405	'label' => $this->l10n->t('Digest mismatch.'),	1✔
406	],	1✔
407	"Document isn't signed or corrupted data." => [	×
408	'id' => 4,	×
409	'label' => $this->l10n->t("Document isn't signed or corrupted data."),	×
410	],	×
411	'Signature has not yet been verified.' => [	×
412	'id' => 5,	×
413	'label' => $this->l10n->t('Signature has not yet been verified.'),	×
414	],	×
415	default => [	2✔
416	'id' => 6,	2✔
417	'label' => $this->l10n->t('Unknown validation failure.'),	2✔
418	],	2✔
419	};	2✔
420	}
421
422
423	private function getReadableCertState(string $status) {
424	return match ($status) {	1✔
425	'Certificate is Trusted.' => [	×
426	'id' => 1,	×
427	'label' => $this->l10n->t('Certificate is trusted.'),	×
428	],	×
429	"Certificate issuer isn't Trusted." => [	×
430	'id' => 2,	×
431	'label' => $this->l10n->t("Certificate issuer isn't trusted."),	×
432	],	×
433	'Certificate issuer is unknown.' => [	1✔
434	'id' => 3,	1✔
435	'label' => $this->l10n->t('Certificate issuer is unknown.'),	1✔
436	],	1✔
437	'Certificate has been Revoked.' => [	×
438	'id' => 4,	×
439	'label' => $this->l10n->t('Certificate has been revoked.'),	×
440	],	×
441	'Certificate has Expired' => [	×
442	'id' => 5,	×
443	'label' => $this->l10n->t('Certificate has expired'),	×
444	],	×
445	'Certificate has not yet been verified.' => [	×
446	'id' => 6,	×
447	'label' => $this->l10n->t('Certificate has not yet been verified.'),	×
448	],	×
449	default => [	1✔
450	'id' => 7,	1✔
451	'label' => $this->l10n->t('Unknown issue with Certificate or corrupted data.')	1✔
452	],	1✔
453	};	1✔
454	}
455
456
457	private function parseDistinguishedNameWithMultipleValues(string $dn): array {
458	$result = [];	1✔
459	$pairs = preg_split('/,(?=(?:[^"]"[^"]")[^"]$)/', $dn);	1✔
460
461	foreach ($pairs as $pair) {	1✔
462	[$key, $value] = explode('=', $pair, 2);	1✔
463	if (empty($key) \|\| empty($value)) {	1✔
464	return $result;	×
465	}
466	$key = trim($key);	1✔
467	$value = trim($value);	1✔
468	$value = trim($value, '"');	1✔
469
470	if (!isset($result[$key])) {	1✔
471	$result[$key] = $value;	1✔
472	} else {
473	if (!is_array($result[$key])) {	×
474	$result[$key] = [$result[$key]];	×
475	}
476	$result[$key][] = $value;	×
477	}
478	}
479
480	return $result;	1✔
481	}
482
483	private function der2pem($derData) {
484	$pem = chunk_split(base64_encode((string)$derData), 64, "\n");	2✔
485	$pem = "-----BEGIN CERTIFICATE-----\n" . $pem . "-----END CERTIFICATE-----\n";	2✔
486	return $pem;	2✔
487	}
488
489	private function getHandler(): SignEngineHandler {
490	$sign_engine = $this->appConfig->getValueString(Application::APP_ID, 'sign_engine', 'JSignPdf');	1✔
491	$property = lcfirst($sign_engine) . 'Handler';	1✔
492	if (!property_exists($this, $property)) {	1✔
493	throw new LibresignException($this->l10n->t('Invalid Sign engine.'), 400);	×
494	}
495	$classHandler = 'OCA\\Libresign\\Handler\\SignEngine\\' . ucfirst($property);	1✔
496	if (!$this->$property instanceof $classHandler) {	1✔
497	$this->$property = \OCP\Server::get($classHandler);	1✔
498	}
499	return $this->$property;	1✔
500	}
501
502	#[\Override]
503	public function sign(): File {
504	$this->beforeSign();	1✔
505
506	$signedContent = $this->getHandler()	1✔
507	->setCertificate($this->getCertificate())	1✔
508	->setInputFile($this->getInputFile())	1✔
509	->setPassword($this->getPassword())	1✔
510	->setSignatureParams($this->getSignatureParams())	1✔
511	->setVisibleElements($this->getVisibleElements())	1✔
512	->getSignedContent();	1✔
513	$this->getInputFile()->putContent($signedContent);	×
514	return $this->getInputFile();	×
515	}
516
517	public function isHandlerOk(): bool {
518	return $this->certificateEngineFactory->getEngine()->isSetupOk();	1✔
519	}
520	}

LibreSign / libresign / 19993337372

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