added composer files and installed vendor packages. Also modified xsls to display base project
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<?php
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/**
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* E008_signature_timestamp.php
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*
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* @since 2026-04-21
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* @category Library
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* @package Pdf
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* @author Nicola Asuni <info@tecnick.com>
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* @copyright 2002-2026 Nicola Asuni - Tecnick.com LTD
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* @license https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE)
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* @link https://github.com/tecnickcom/tc-lib-pdf
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*
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* This file is part of tc-lib-pdf software library.
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*/
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// NOTE: local file reads (images, fonts, attachments) are restricted to an allowlist of
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// trusted paths that covers this package tree, so run the examples in place. To read assets
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// from other locations, list them in the 'allowedPaths' entry of the fileOptions constructor
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// parameter (see E047_remote_resources_security.php).
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// NOTE: run make fonts in the project root to generate the dependencies and example fonts.
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// autoloader when using Composer
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require __DIR__ . '/../vendor/autoload.php';
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// define fonts directory
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\define('K_PATH_FONTS', \realpath(__DIR__ . '/../vendor/tecnickcom/tc-lib-pdf-font/target/fonts'));
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// main TCPDF object
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$pdf = new \Com\Tecnick\Pdf\Tcpdf();
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$pdf->setCreator('tc-lib-pdf');
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$pdf->setAuthor('Nicola Asuni');
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$pdf->setSubject('tc-lib-pdf example: 008');
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$pdf->setTitle('PAdES B-T Signature Timestamp Example');
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$pdf->setKeywords('TCPDF tc-lib-pdf example signature timestamp tsa pades pades-b-t');
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$pdf->setPDFFilename('008_signature_timestamp.pdf');
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// Insert font before adding the first page.
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$bfont = $pdf->font->insert($pdf->pon, 'helvetica', '', 11);
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$page = $pdf->addPage();
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$pdf->page->addContent($bfont['out']);
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$text = 'This document is a PAdES-BASELINE-T signature: B-B plus an RFC 3161 signature timestamp.';
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$textCell = $pdf->getTextCell(
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txt: $text,
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posx: 15,
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posy: 20,
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width: 180,
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height: 0,
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offset: 0,
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linespace: 1,
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valign: \Com\Tecnick\Pdf\TextVAlign::Top,
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halign: \Com\Tecnick\Pdf\TextHAlign::Left,
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);
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$pdf->page->addContent($textCell);
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$text2 = 'Timestamping requires outbound HTTPS connectivity to the configured TSA endpoint.';
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$textCell2 = $pdf->getTextCell(
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txt: $text2,
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posx: 15,
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posy: 27,
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width: 180,
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height: 0,
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offset: 0,
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linespace: 1,
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valign: \Com\Tecnick\Pdf\TextVAlign::Top,
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halign: \Com\Tecnick\Pdf\TextHAlign::Left,
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);
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$pdf->page->addContent($textCell2);
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$certPath = \realpath(__DIR__ . '/data/cert/tcpdf.crt');
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if ($certPath === false) {
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throw new \RuntimeException('Missing signing certificate: examples/data/cert/tcpdf.crt');
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}
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$cert = 'file://' . $certPath;
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// PAdES-BASELINE-T: configure() selects the profile, timestamp() adds the TSA;
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// both calls are chainable. The signing process and this demo's limitations are
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// rendered into the document itself (see the explanatory block added below).
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$pdf
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->signature()
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->configure([
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'profile' => 'pades-b-t',
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'digest_algorithm' => 'sha256',
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'cert_type' => 2,
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'info' => [
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'ContactInfo' => 'https://github.com/tecnickcom/tc-lib-pdf',
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'Location' => 'Demo Office',
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'Name' => 'tc-lib-pdf',
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'Reason' => 'PAdES-BASELINE-T timestamped signature example',
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],
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'password' => '',
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'privkey' => $cert,
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'signcert' => $cert,
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])
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->timestamp([
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'enabled' => true,
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// Public demo endpoint. For production use your trusted TSA service.
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'host' => 'https://freetsa.org/tsr',
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'username' => '',
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'password' => '',
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'cert' => '',
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'hash_algorithm' => 'sha256',
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'policy_oid' => '',
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'nonce_enabled' => true,
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'timeout' => 30,
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'verify_peer' => true,
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]);
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$pdf
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->signature()
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->appearance()
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->place(posx: 15, posy: 35, width: 90, height: 20, page: -1, name: 'TimestampedSignature');
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// Optional appearance stream to clearly indicate timestamped signature intent.
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$sigW = 90.0;
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$sigH = 20.0;
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$sigTopY = $page['height'] - $sigH;
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$sigAppearance = $bfont['out'];
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$sigAppearance .= $pdf->color->getPdfColor('rgb(20%,20%,20%)');
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$sigAppearance .= $pdf->getTextCell(
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txt: 'PAdES B-T Timestamped Signature',
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posx: 0,
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posy: $sigTopY,
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width: $sigW,
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height: $sigH,
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offset: 3.0,
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linespace: 0,
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valign: \Com\Tecnick\Pdf\TextVAlign::Center,
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halign: \Com\Tecnick\Pdf\TextHAlign::Left,
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cell: null,
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styles: [
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'all' => [
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'fillColor' => 'rgb(96%,96%,90%)',
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'lineColor' => 'rgb(35%,35%,10%)',
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'lineWidth' => 1.0,
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],
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],
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strokewidth: 0,
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wordspacing: 0,
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leading: 0,
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rise: 0,
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jlast: true,
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fill: true,
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stroke: false,
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underline: false,
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linethrough: false,
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overline: false,
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clip: false,
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drawcell: true,
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);
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$pdf->signature()->appearance()->stream(stream: $sigAppearance);
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// Render the signing process and the demo's limitations into the document so the
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// output PDF is self-documenting (this text is page content, not part of the
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// signed appearance stream).
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$explainHtml = <<<HTML
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<h2 style="font-size:11pt;color:#1f2a33;">How this PAdES-BASELINE-T signature is produced</h2>
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<p style="font-size:9pt;color:#1f2a33;">A B-T signature is a B-B signature (example E007) plus a signature
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timestamp. The library first builds the CAdES CMS, then sends the SignerInfo signature bytes to the TSA
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and embeds the returned RFC 3161 token in the CMS as the <code>id-aa-signatureTimeStampToken</code>
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unsigned attribute. The output CMS verifies over the <code>/ByteRange</code> bytes and carries a genuine
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TSA token that binds a trusted time to the signature.</p>
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<h2 style="font-size:11pt;color:#7a1f1f;">Limitations of this demo</h2>
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<ul style="font-size:9pt;color:#1f2a33;">
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<li>Timestamping performs a live RFC 3161 request to the TSA over HTTPS. The endpoint used here is the
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public freetsa.org demo service; use your own trusted TSA in production. The timestamp is mandatory
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for <code>pades-b-t</code> and above, so if the TSA is unreachable or rejects the request the signing
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step throws a signing exception and no PDF is produced.</li>
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<li>The bundled certificate is self-signed, so (as in E007) the signature is cryptographically valid
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but the signer identity is not trusted by viewers. The embedded timestamp itself is a real
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freetsa.org token and validates.</li>
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</ul>
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HTML;
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$pdf->addHTMLCell(html: $explainHtml, posx: 15, posy: 65, width: 180);
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$rawpdf = $pdf->getOutPDFString();
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$pdf->renderPDF(rawpdf: $rawpdf);
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