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<?php
/**
* E045_encryption_and_permissions.php
*
* @since 2026-04-27
* @category Library
* @package Pdf
* @author Nicola Asuni <info@tecnick.com>
* @copyright 2002-2026 Nicola Asuni - Tecnick.com LTD
* @license https://www.gnu.org/copyleft/lesser.html GNU-LGPL v3 (see LICENSE.TXT)
* @link https://github.com/tecnickcom/tc-lib-pdf
*
* This file is part of tc-lib-pdf software library.
*/
// NOTE: run make deps fonts in the project root to generate the dependencies and example fonts.
// autoloader when using Composer
require __DIR__ . '/../vendor/autoload.php';
// define fonts directory
\define('K_PATH_FONTS', \realpath(__DIR__ . '/../vendor/tecnickcom/tc-lib-pdf-font/target/fonts'));
// autoloader when using RPM or DEB package installation
//require ('/usr/share/php/Com/Tecnick/Pdf/autoload.php');
$fileId = \md5('E045_encryption_and_permissions');
$encrypt = new \Com\Tecnick\Pdf\Encrypt\Encrypt(
enabled: true,
file_id: $fileId,
mode: 2,
permissions: ['modify', 'copy', 'annot-forms', 'assemble'],
user_pass: 'demo-user',
owner_pass: 'demo-owner',
);
// main TCPDF object
$pdf = new \Com\Tecnick\Pdf\Tcpdf(
unit: 'mm',
isunicode: true,
subsetfont: false,
compress: true,
mode: '',
objEncrypt: $encrypt,
);
// ----------
$pdf->setCreator('tc-lib-pdf');
$pdf->setAuthor('Nicola Asuni');
$pdf->setSubject('tc-lib-pdf example: 045');
$pdf->setTitle('Encryption and Permissions');
$pdf->setKeywords('TCPDF tc-lib-pdf encryption permissions user password owner password rights');
$pdf->setPDFFilename('E045_encryption_and_permissions.pdf');
$pdf->setViewerPreferences(['DisplayDocTitle' => true]);
$pdf->enableDefaultPageContent();
// ----------
// Insert fonts
$bfont = $pdf->font->insert($pdf->pon, 'helvetica', '', 10);
$page01 = $pdf->addPage();
$pdf->page->addContent($bfont['out']);
$html = <<<HTML
<h1>Encryption and Permissions</h1>
<p>This document demonstrates PDF encryption and permission controls using tc-lib-pdf.
The file is protected with a user password (<em>demo-user</em>) and an owner password (<em>demo-owner</em>).
Encryption restricts unauthorized access while the owner password grants full control.
The allowed permissions for this document are: <strong>modify</strong>, <strong>copy</strong>,
<strong>annot-forms</strong>, and <strong>assemble</strong>.
All other operations, such as printing, are denied.</p>
HTML;
$pdf->addHTMLCell(html: $html, posx: 20, posy: 10, width: 180);
// ----------
// get PDF document as raw string
$rawpdf = $pdf->getOutPDFString();
// Various output modes:
//$pdf->savePDF(\dirname(__DIR__).'/target', $rawpdf);
$pdf->renderPDF(rawpdf: $rawpdf);
//$pdf->downloadPDF($rawpdf);
//echo $pdf->getMIMEAttachmentPDF($rawpdf);