25415196794

Committed 06 May 2026 03:40AM UTC coverage: 56.755%. First build

Build # 25415196794

Build Type

Pull #7644

github

Committed by

web-flow

Commit Message

Merge c8d1654f1 into 9ffbc3bb0

Pull Request Pull Request #7644: fix: support Twig date filter for ServerSignatureDate in JSign

Coverage Stats

18 of 19 new or added lines in 3 files covered. (94.74%)

10692 of 18839 relevant lines covered (56.75%)

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18.14

/lib/Handler/SignEngine/JSignPdfHandler.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 Imagick;
use ImagickPixel;
use OCA\Libresign\AppInfo\Application;
use OCA\Libresign\Exception\LibresignException;
use OCA\Libresign\Handler\CertificateEngine\CertificateEngineFactory;
use OCA\Libresign\Helper\JavaHelper;
use OCA\Libresign\Service\DocMdp\ConfigService as DocMdpConfigService;
use OCA\Libresign\Service\Install\InstallService;
use OCA\Libresign\Service\SignatureBackgroundService;
use OCA\Libresign\Service\SignatureTextService;
use OCA\Libresign\Service\SignerElementsService;
use OCA\Libresign\Vendor\Jeidison\JSignPDF\JSignPDF;
use OCA\Libresign\Vendor\Jeidison\JSignPDF\Sign\JSignParam;
use OCP\Files\File;
use OCP\IAppConfig;
use OCP\ITempManager;
use Psr\Log\LoggerInterface;

class JSignPdfHandler extends Pkcs12Handler {
        private const MIN_PDF_VERSION = 1.2;
        private const TARGET_OLD_PDF_VERSION = '1.3';
        private const MIN_PDF_VERSION_SHA256 = 1.6;
        private const TARGET_PDF_VERSION_SHA256 = '1.6';
        private const MIN_PDF_VERSION_SHA1_REJECT = 1.7;
        private const SIGNATURE_DEFAULT_FONT_SIZE = 10.0;
        private const PAGE_FIRST = 1;
        private const SCALE_FACTOR_MIN = 5;

        /** @var JSignPDF */
        private $jSignPdf;
        /** @var JSignParam */
        private $jSignParam;
        private array $parsedSignatureText = [];

        public function __construct(
                private IAppConfig $appConfig,
                private LoggerInterface $logger,
                private SignatureTextService $signatureTextService,
                private ITempManager $tempManager,
                private SignatureBackgroundService $signatureBackgroundService,
                protected CertificateEngineFactory $certificateEngineFactory,
                protected JavaHelper $javaHelper,
                private DocMdpConfigService $docMdpConfigService,
        ) {
        }

        public function setJSignPdf(JSignPDF $jSignPdf): void {
                $this->jSignPdf = $jSignPdf;
        }

        public function getJSignPdf(): JSignPDF {
                if (!$this->jSignPdf) {
                        // @codeCoverageIgnoreStart
                        $this->setJSignPdf(new JSignPDF());
                        // @codeCoverageIgnoreEnd
                }
                return $this->jSignPdf;
        }

        /**
         * @psalm-suppress MixedReturnStatement
         */
        public function getJSignParam(): JSignParam {
                if (!$this->jSignParam) {
                        $javaPath = $this->javaHelper->getJavaPath();
                        $tempPath = $this->appConfig->getValueString(Application::APP_ID, 'jsignpdf_temp_path', sys_get_temp_dir() . DIRECTORY_SEPARATOR);
                        if (!is_writable($tempPath)) {
                                throw new \Exception('The path ' . $tempPath . ' is not writtable. Fix this or change the LibreSign app setting jsignpdf_temp_path to a writtable path');
                        }
                        $jSignPdfJarPath = $this->appConfig->getValueString(Application::APP_ID, 'jsignpdf_jar_path', '/opt/jsignpdf-' . InstallService::JSIGNPDF_VERSION . '/JSignPdf.jar');
                        if (!file_exists($jSignPdfJarPath)) {
                                throw new \Exception('Invalid JSignPdf jar path. Run occ libresign:install --jsignpdf');
                        }
                        $this->jSignParam = (new JSignParam())
                                ->setTempPath($tempPath)
                                ->setIsUseJavaInstalled(empty($javaPath))
                                ->setJavaDownloadUrl('')
                                ->setJSignPdfDownloadUrl('')
                                ->setjSignPdfJarPath($jSignPdfJarPath);
                        if (!empty($javaPath)) {
                                if (!file_exists($javaPath)) {
                                        throw new \Exception('Invalid Java binary. Run occ libresign:install --java');
                                }
                                $this->jSignParam->setJavaPath(
                                        $this->getEnvironments()
                                        . $javaPath
                                        . ' -Duser.home=' . escapeshellarg($this->getHome()) . ' '
                                );
                        }
                }
                return $this->jSignParam;
        }

        private function getEnvironments(): string {
                return 'JSIGNPDF_HOME=' . escapeshellarg($this->getHome()) . ' ';
        }

        /**
         * It's a workaround to create the folder structure that JSignPdf needs. Without
         * this, the JSignPdf will return the follow message to all commands:
         * > FINE Config file conf/conf.properties doesn't exists.
         * > FINE Default property file /root/.JSignPdf doesn't exists.
         */
        private function getHome(): string {
                $configuredHome = $this->getConfiguredHome();
                if ($configuredHome !== null) {
                        return $configuredHome;
                }

                $tempFolder = $this->createJSignPdfTempFolder();
                $this->initializeJSignPdfConfigurationFiles($tempFolder);
                return $tempFolder;
        }

        private function getConfiguredHome(): ?string {
                $jSignPdfHome = $this->appConfig->getValueString(Application::APP_ID, 'jsignpdf_home', '');
                if ($jSignPdfHome && is_dir($jSignPdfHome)) {
                        return $jSignPdfHome;
                }
                return null;
        }

        private function createJSignPdfTempFolder(): string {
                $jsignpdfTempFolder = $this->tempManager->getTemporaryFolder('jsignpdf');
                if (!$jsignpdfTempFolder) {
                        throw new \Exception('Temporary file not accessible');
                }
                mkdir(
                        directory: $jsignpdfTempFolder . '/conf',
                        recursive: true
                );
                return $jsignpdfTempFolder;
        }

        private function initializeJSignPdfConfigurationFiles(string $folder): void {
                $this->createEmptyFile($folder . '/conf/conf.properties');
                $this->createEmptyFile($folder . '/.JSignPdf');
        }

        private function createEmptyFile(string $path): void {
                $file = fopen($path, 'w');
                fclose($file);
        }

        private function getHashAlgorithm(string $pdfContent): string {
                $configuredAlgorithm = $this->appConfig->getValueString(Application::APP_ID, 'signature_hash_algorithm', 'SHA256');
                /**
                 * Need to respect the follow code:
                 * https://github.com/intoolswetrust/jsignpdf/blob/JSignPdf_2_2_2/jsignpdf/src/main/java/net/sf/jsignpdf/types/HashAlgorithm.java#L46-L47
                 */
                $pdfVersion = $this->extractPdfVersion($pdfContent);

                if ($pdfVersion === null) {
                        return $this->validateHashAlgorithm($configuredAlgorithm);
                }

                return $this->getHashAlgorithmForPdfVersion($pdfVersion, $configuredAlgorithm);
        }

        private function extractPdfVersion(string $content): ?float {
                if (!preg_match('/^%PDF-(?<version>\d+(\.\d+)?)/', $content, $match)) {
                        return null;
                }
                return (float)$match['version'];
        }

        private function getHashAlgorithmForPdfVersion(float $pdfVersion, string $configuredAlgorithm): string {
                if ($pdfVersion < 1.6) {
                        return 'SHA1';
                }
                if ($pdfVersion < self::MIN_PDF_VERSION_SHA1_REJECT) {
                        return 'SHA256';
                }
                if ($pdfVersion >= self::MIN_PDF_VERSION_SHA1_REJECT && $configuredAlgorithm === 'SHA1') {
                        return 'SHA256';
                }
                return $this->validateHashAlgorithm($configuredAlgorithm);
        }

        private function validateHashAlgorithm(string $algorithm): string {
                $supportedAlgorithms = ['SHA1', 'SHA256', 'SHA384', 'SHA512', 'RIPEMD160'];
                return in_array($algorithm, $supportedAlgorithms) ? $algorithm : 'SHA256';
        }

        /**
         * Normalizes very old PDFs (1.0/1.1) to 1.3.
         * Rationale: JSignPDF enum PdfVersion only defines 1.2+; for 1.0/1.1,
         * PdfVersion.fromCharVersion(...) returns null and SignerLogic.signFile() NPEs.
         * See JSignPDF 2.3.0 sources: types/PdfVersion.java and SignerLogic.signFile().
         */
        private function normalizePdfVersion(string $content): string {
                $version = $this->extractPdfVersion($content);
                if ($version === null) {
                        return $content;
                }

                // Convert very old PDFs (< 1.2) to 1.3 to avoid JSignPDF NullPointerException
                if ($this->isVeryOldPdfVersion($version)) {
                        return $this->replacePdfVersion($content, self::TARGET_OLD_PDF_VERSION);
                }

                // Convert PDFs < 1.6 to 1.6 if using SHA-256 (the default hash algorithm)
                // This prevents "The chosen hash algorithm (SHA-256) requires a newer PDF version" error
                if ($this->requiresPdfVersionUpgradeForSha256($version)) {
                        return $this->replacePdfVersion($content, self::TARGET_PDF_VERSION_SHA256);
                }

                return $content;
        }

        private function isVeryOldPdfVersion(float $version): bool {
                return $version > 0 && $version < self::MIN_PDF_VERSION;
        }

        private function requiresPdfVersionUpgradeForSha256(float $version): bool {
                if ($version >= self::MIN_PDF_VERSION_SHA256) {
                        return false;
                }
                $hashAlgorithm = $this->appConfig->getValueString(Application::APP_ID, 'signature_hash_algorithm', 'SHA256');
                return $hashAlgorithm === 'SHA256';
        }

        private function replacePdfVersion(string $content, string $newVersion): string {
                return (string)preg_replace('/^%PDF-\d+(\.\d+)?/', '%PDF-' . $newVersion, $content, 1);
        }

        private function getCertificationLevel(): ?string {
                if (!$this->docMdpConfigService->isEnabled()) {
                        return null;
                }

                return $this->docMdpConfigService->getLevel()->name;
        }

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

                $signedContent = $this->getSignedContent();
                $this->getInputFile()->putContent($signedContent);
                return $this->getInputFile();
        }

        #[\Override]
        public function getSignedContent(): string {
                $normalizedPdf = $this->normalizePdfVersion($this->getInputFile()->getContent());
                $hashAlgorithm = $this->getHashAlgorithm($normalizedPdf);
                $param = $this->getJSignParam();

                $tsaParams = $this->listParamsToString($this->getTsaParameters());

                $visibleElements = $this->getVisibleElements();
                $certParams = '';
                $certificationLevel = $this->getCertificationLevel();
                if ($certificationLevel !== null && !$visibleElements && !$this->hasExistingSignatures($normalizedPdf)) {
                        $certParams = ' -cl ' . $certificationLevel;
                }

                $param->setJSignParameters(
                        $param->getJSignParameters()
                        . $certParams
                        . $tsaParams
                );
                $param->setCertificate($this->getCertificate())
                        ->setPdf($normalizedPdf)
                        ->setPassword($this->getPassword());

                $signed = $this->signUsingVisibleElements($normalizedPdf, $hashAlgorithm);
                if ($signed) {
                        return $signed;
                }

                $param->setJSignParameters(
                        $param->getJSignParameters()
                        . $this->listParamsToString([
                                '--hash-algorithm' => $hashAlgorithm,
                        ])
                );
                $jSignPdf = $this->getJSignPdf();
                $jSignPdf->setParam($param);
                return $this->signWrapper($jSignPdf);
        }

        private function signUsingVisibleElements(string $normalizedPdf, string $hashAlgorithm): string {
                $visibleElements = $this->getVisibleElements();
                if ($visibleElements) {
                        $jSignPdf = $this->getJSignPdf();

                        $renderMode = $this->signatureTextService->getRenderMode();

                        $params = [
                                '--l2-text' => $this->getSignatureText(),
                                '-V' => null,
                        ];

                        // When l2-text is empty, add hash-algorithm at the beginning
                        if ($params['--l2-text'] === '""') {
                                $params = [
                                        '--hash-algorithm' => $hashAlgorithm,
                                        '--l2-text' => $params['--l2-text'],
                                        '-V' => null,
                                ];
                        }

                        $fontSize = $this->parseSignatureText()['templateFontSize'];
                        if ($fontSize === self::SIGNATURE_DEFAULT_FONT_SIZE || !$fontSize || $params['--l2-text'] === '""') {
                                $fontSize = 0;
                        }

                        $backgroundType = $this->signatureBackgroundService->getSignatureBackgroundType();
                        if ($backgroundType !== 'deleted') {
                                $backgroundPath = $this->signatureBackgroundService->getImagePath();
                        } else {
                                $backgroundPath = '';
                        }

                        $certificationLevel = $this->getCertificationLevel();
                        $applyCertification = $certificationLevel !== null && !$this->hasExistingSignatures($normalizedPdf);
                        $certParams = $applyCertification ? ' -cl ' . $certificationLevel : '';
                        $elementIndex = 0;

                        $param = $this->getJSignParam();
                        $originalParam = clone $param;

                        foreach ($visibleElements as $element) {
                                $elementIndex++;
                                $params['-pg'] = $element->getFileElement()->getPage();
                                if ($params['-pg'] <= self::PAGE_FIRST) {
                                        unset($params['-pg']);
                                }
                                $params['-llx'] = $element->getFileElement()->getLlx();
                                $params['-lly'] = $element->getFileElement()->getLly();
                                $params['-urx'] = $element->getFileElement()->getUrx();
                                $params['-ury'] = $element->getFileElement()->getUry();

                                $scaleFactor = $this->getScaleFactor($params['-urx'] - $params['-llx']);
                                if ($fontSize) {
                                        $params['--font-size'] = $fontSize * $scaleFactor;
                                }

                                $backgroundPathForElement = $backgroundPath
                                        ? $this->prepareBackgroundForPdf($backgroundPath, $this->normalizeScaleFactor($scaleFactor))
                                        : '';

                                $signatureImagePath = $element->getTempFile();
                                if ($backgroundType === 'deleted') {
                                        if ($renderMode === SignerElementsService::RENDER_MODE_SIGNAME_AND_DESCRIPTION) {
                                                $params['--render-mode'] = SignerElementsService::RENDER_MODE_GRAPHIC_AND_DESCRIPTION;
                                                $params['--img-path'] = $this->createTextImage(
                                                        width: ($params['-urx'] - $params['-llx']),
                                                        height: ($params['-ury'] - $params['-lly']),
                                                        fontSize: $this->signatureTextService->getSignatureFontSize() * $scaleFactor,
                                                        scaleFactor: $this->normalizeScaleFactor($scaleFactor),
                                                );
                                        } elseif ($signatureImagePath) {
                                                $params['--bg-path'] = $signatureImagePath;
                                        }
                                } elseif ($params['--l2-text'] === '""') {
                                        if ($backgroundPathForElement && $signatureImagePath) {
                                                $params['--bg-path'] = $this->mergeBackgroundWithSignature(
                                                        $backgroundPathForElement,
                                                        $signatureImagePath,
                                                        $this->normalizeScaleFactor($scaleFactor),
                                                );
                                        } elseif ($backgroundPathForElement) {
                                                $params['--bg-path'] = $backgroundPathForElement;
                                        } elseif ($signatureImagePath) {
                                                $params['--bg-path'] = $signatureImagePath;
                                        }
                                } else {
                                        if ($renderMode === SignerElementsService::RENDER_MODE_GRAPHIC_AND_DESCRIPTION) {
                                                $params['--render-mode'] = SignerElementsService::RENDER_MODE_GRAPHIC_AND_DESCRIPTION;
                                                $params['--bg-path'] = $backgroundPathForElement;
                                                if ($signatureImagePath) {
                                                        $params['--img-path'] = $signatureImagePath;
                                                }
                                        } elseif ($renderMode === SignerElementsService::RENDER_MODE_SIGNAME_AND_DESCRIPTION) {
                                                $params['--render-mode'] = SignerElementsService::RENDER_MODE_GRAPHIC_AND_DESCRIPTION;
                                                $params['--bg-path'] = $backgroundPathForElement;
                                                $params['--img-path'] = $this->createTextImage(
                                                        width: (int)(($params['-urx'] - $params['-llx']) / 2),
                                                        height: $params['-ury'] - $params['-lly'],
                                                        fontSize: $this->signatureTextService->getSignatureFontSize() * $scaleFactor,
                                                        scaleFactor: $this->normalizeScaleFactor($scaleFactor),
                                                );

                                        } else {
                                                $params['--bg-path'] = $backgroundPathForElement;
                                        }
                                }

                                // Only add hash-algorithm at the end if l2-text is not empty
                                if ($params['--l2-text'] !== '""') {
                                        $params['--hash-algorithm'] = $hashAlgorithm;
                                }

                                $elementCertParams = ($applyCertification && $elementIndex === 1) ? $certParams : '';
                                $param->setJSignParameters(
                                        $originalParam->getJSignParameters()
                                        . $elementCertParams
                                        . $this->listParamsToString($params)
                                );
                                $param->setPdf($normalizedPdf);
                                $jSignPdf->setParam($param);
                                $signed = $this->signWrapper($jSignPdf);
                                $normalizedPdf = $signed;
                        }
                        return $signed;
                }
                return '';
        }

        private function hasExistingSignatures(string $pdfContent): bool {
                return (bool)preg_match('/\/ByteRange\s*\[|\/Type\s*\/Sig\b|\/DocMDP\b|\/Perms\b/', $pdfContent);
        }

        private function getScaleFactor(float $width): float {
                $systemWidth = $this->signatureTextService->getFullSignatureWidth();
                if (!$systemWidth) {
                        return 1;
                }
                return $width / $systemWidth;
        }

        private function normalizeScaleFactor(float $scaleFactor): float {
                return max($scaleFactor, self::SCALE_FACTOR_MIN);
        }


        #[\Override]
        public function readCertificate(): array {
                $result = $this->certificateEngineFactory
                        ->getEngine()
                        ->readCertificate(
                                $this->getCertificate(),
                                $this->getPassword()
                        );

                if (!is_array($result)) {
                        throw new \RuntimeException('Failed to read certificate data');
                }

                return $result;
        }

        private function createTextImage(int $width, int $height, float $fontSize, float $scaleFactor): string {
                $params = $this->getSignatureParams();
                if (!empty($params['SignerCommonName'])) {
                        $commonName = $params['SignerCommonName'];
                } else {
                        $certificateData = $this->readCertificate();
                        $commonName = $certificateData['subject']['CN'] ?? throw new \RuntimeException('Certificate must have a Common Name (CN) in subject field');
                }
                $content = $this->signatureTextService->signerNameImage(
                        width: $width,
                        height: $height,
                        text: $commonName,
                        fontSize: $fontSize,
                        scale: $scaleFactor,
                );

                $tmpPath = $this->tempManager->getTemporaryFile('_text_image.png');
                if (!$tmpPath) {
                        throw new \Exception('Temporary file not accessible');
                }
                file_put_contents($tmpPath, $content);
                return $tmpPath;
        }

        private function mergeBackgroundWithSignature(string $backgroundPath, string $signaturePath, float $scaleFactor): string {
                if (!extension_loaded('imagick')) {
                        throw new \Exception('Extension imagick is not loaded.');
                }
                $baseWidth = $this->signatureTextService->getFullSignatureWidth();
                $baseHeight = $this->signatureTextService->getFullSignatureHeight();

                $canvasWidth = round($baseWidth * $scaleFactor);
                $canvasHeight = round($baseHeight * $scaleFactor);

                $background = new Imagick($backgroundPath);
                $signature = new Imagick($signaturePath);

                $background->setImageFormat('png');
                $signature->setImageFormat('png');

                $background->setImageAlphaChannel(Imagick::ALPHACHANNEL_ACTIVATE);
                $signature->setImageAlphaChannel(Imagick::ALPHACHANNEL_ACTIVATE);

                $background->resizeImage(
                        (int)$canvasWidth,
                        (int)$canvasHeight,
                        Imagick::FILTER_LANCZOS,
                        1,
                        true
                );

                $signature->resizeImage(
                        (int)round($signature->getImageWidth() * $scaleFactor),
                        (int)round($signature->getImageHeight() * $scaleFactor),
                        Imagick::FILTER_LANCZOS,
                        1
                );

                $canvas = new Imagick();
                $canvas->newImage((int)$canvasWidth, (int)$canvasHeight, new ImagickPixel('transparent'));
                $canvas->setImageFormat('png32');
                $canvas->setImageAlphaChannel(Imagick::ALPHACHANNEL_ACTIVATE);

                $bgX = (int)(($canvasWidth - $background->getImageWidth()) / 2);
                $bgY = (int)(($canvasHeight - $background->getImageHeight()) / 2);
                $canvas->compositeImage($background, Imagick::COMPOSITE_OVER, $bgX, $bgY);

                $sigX = (int)(($canvasWidth - $signature->getImageWidth()) / 2);
                $sigY = (int)(($canvasHeight - $signature->getImageHeight()) / 2);
                $canvas->compositeImage($signature, Imagick::COMPOSITE_OVER, $sigX, $sigY);

                $tmpPath = $this->tempManager->getTemporaryFile('_merged.png');
                if (!$tmpPath) {
                        throw new \Exception('Temporary file not accessible');
                }
                $canvas->writeImage($tmpPath);

                $canvas->clear();
                $background->clear();
                $signature->clear();

                return $tmpPath;
        }

        private function prepareBackgroundForPdf(string $backgroundPath, float $scaleFactor): string {
                if (!extension_loaded('imagick')) {
                        throw new \Exception('Extension imagick is not loaded.');
                }
                $baseWidth = $this->signatureTextService->getFullSignatureWidth();
                $baseHeight = $this->signatureTextService->getFullSignatureHeight();

                $canvasWidth = (int)round($baseWidth * $scaleFactor);
                $canvasHeight = (int)round($baseHeight * $scaleFactor);

                $background = new Imagick($backgroundPath);
                $background->setImageFormat('png');
                $background->setImageAlphaChannel(Imagick::ALPHACHANNEL_ACTIVATE);
                $background->resizeImage(
                        $canvasWidth,
                        $canvasHeight,
                        Imagick::FILTER_LANCZOS,
                        1,
                        true
                );

                $canvas = new Imagick();
                $canvas->newImage($canvasWidth, $canvasHeight, new ImagickPixel('transparent'));
                $canvas->setImageFormat('png32');
                $canvas->setImageAlphaChannel(Imagick::ALPHACHANNEL_ACTIVATE);

                $bgX = (int)(($canvasWidth - $background->getImageWidth()) / 2);
                $bgY = (int)(($canvasHeight - $background->getImageHeight()) / 2);
                $canvas->compositeImage($background, Imagick::COMPOSITE_OVER, $bgX, $bgY);

                $tmpPath = $this->tempManager->getTemporaryFile('_background.png');
                if (!$tmpPath) {
                        throw new \Exception('Temporary file not accessible');
                }
                $canvas->writeImage($tmpPath);

                $canvas->clear();
                $background->clear();

                return $tmpPath;
        }

        private function parseSignatureText(): array {
                if (!$this->parsedSignatureText) {
                        $params = $this->getSignatureParams();
                        $template = $this->signatureTextService->getTemplate();
                        $params['ServerSignatureDate'] = $this->shouldUseJSignTimestampPlaceholder($template)
                                ? '${timestamp}'
                                : (new \DateTimeImmutable('now', new \DateTimeZone('UTC')))
                                        ->format(\DateTimeInterface::ATOM);
                        $this->parsedSignatureText = $this->signatureTextService->parse(context: $params);
                }
                return $this->parsedSignatureText;
        }

        private function shouldUseJSignTimestampPlaceholder(string $template): bool {
                if (!preg_match_all('/{{\s*(.*?)\s*}}/s', $template, $matches)) {
                        return true;
                }

                $hasPlainServerSignatureDate = false;
                foreach ($matches[1] as $expression) {
                        if (!str_contains($expression, 'ServerSignatureDate')) {
                                continue;
                        }
                        if (trim($expression) === 'ServerSignatureDate') {
                                $hasPlainServerSignatureDate = true;
                                continue;
                        }
                        // Any transformation (for example Twig date filter) requires a real date value.
                        return false;
                }

                return $hasPlainServerSignatureDate;
        }

        public function getSignatureText(): string {
                $renderMode = $this->signatureTextService->getRenderMode();
                if ($renderMode !== SignerElementsService::RENDER_MODE_GRAPHIC_ONLY) {
                        $data = $this->parseSignatureText();
                        $signatureText = '"' . str_replace(
                                ['"', '$'],
                                ['\"', '\$'],
                                $data['parsed']
                        ) . '"';
                } else {
                        $signatureText = '""';
                }

                return $signatureText;
        }

        private function listParamsToString(array $params): string {
                $paramString = '';
                foreach ($params as $flag => $value) {
                        $paramString .= ' ' . $flag;
                        if ($value !== null && $value !== '') {
                                $paramString .= ' ' . $value;
                        }
                }
                return $paramString;
        }

        private function getTsaParameters(): array {
                $tsaUrl = $this->appConfig->getValueString(Application::APP_ID, 'tsa_url', '');
                if (empty($tsaUrl)) {
                        return [];
                }

                $params = [
                        '--tsa-server-url' => $tsaUrl,
                        '--tsa-policy-oid' => $this->appConfig->getValueString(Application::APP_ID, 'tsa_policy_oid', ''),
                ];

                if (!$params['--tsa-policy-oid']) {
                        unset($params['--tsa-policy-oid']);
                }

                $tsaAuthType = $this->appConfig->getValueString(Application::APP_ID, 'tsa_auth_type', 'none');
                if ($tsaAuthType === 'basic') {
                        $tsaUsername = $this->appConfig->getValueString(Application::APP_ID, 'tsa_username', '');
                        $tsaPassword = $this->appConfig->getValueString(Application::APP_ID, 'tsa_password', '');

                        if (!empty($tsaUsername) && !empty($tsaPassword)) {
                                $params['--tsa-authentication'] = 'PASSWORD';
                                $params['--tsa-user'] = $tsaUsername;
                                $params['--tsa-password'] = $tsaPassword;
                        }
                }

                return $params;
        }

        private function signWrapper(JSignPDF $jSignPDF): string {
                try {
                        return $jSignPDF->sign();
                } catch (\Throwable $th) {
                        $errorMessage = $th->getMessage();

                        $this->checkTsaError($errorMessage);
                        $this->checkHashAlgorithmError($errorMessage);

                        $this->logger->error('Error at JSignPdf side. LibreSign can not do nothing. Follow the error message: ' . $errorMessage);
                        throw new \Exception($errorMessage);
                }
        }

        private function checkTsaError(string $errorMessage): void {
                $tsaErrors = ['TSAClientBouncyCastle', 'UnknownHostException', 'Invalid TSA'];
                $isTsaError = false;
                foreach ($tsaErrors as $error) {
                        if (str_contains($errorMessage, $error)) {
                                $isTsaError = true;
                                break;
                        }
                }

                if ($isTsaError) {
                        if (str_contains($errorMessage, 'Invalid TSA') && preg_match("/Invalid TSA '([^']+)'/", $errorMessage, $matches)) {
                                $friendlyMessage = 'Timestamp Authority (TSA) service is unavailable. Check DNS/network/firewall connectivity from this server: ' . $matches[1];
                        } else {
                                $friendlyMessage = 'Timestamp Authority (TSA) service error.' . "\n"
                                        . 'Check TSA endpoint and DNS/network/firewall connectivity from this server.';
                        }
                        throw new LibresignException($friendlyMessage);
                }
        }

        private function checkHashAlgorithmError(string $errorMessage): void {
                $rows = str_getcsv($errorMessage);
                $hashAlgorithm = array_filter($rows, fn ($r) => str_contains((string)$r, 'The chosen hash algorithm'));

                if (!empty($hashAlgorithm)) {
                        $hashAlgorithm = current($hashAlgorithm);
                        $hashAlgorithm = trim((string)$hashAlgorithm, 'INFO ');
                        $hashAlgorithm = str_replace('\"', '"', $hashAlgorithm);
                        $hashAlgorithm = preg_replace('/\.( )/', ".\n", $hashAlgorithm);
                        throw new LibresignException($hashAlgorithm);
                }
        }
}

LibreSign / libresign / 25415196794

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