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+<?php
+//============================================================+
+// File name   : example_016.php
+// Begin       : 2008-03-04
+// Last Update : 2013-05-14
+//
+// Description : Example 016 for TCPDF class
+//               Document Encryption / Security
+//
+// Author: Nicola Asuni
+//
+// (c) Copyright:
+//               Nicola Asuni
+//               Tecnick.com LTD
+//               www.tecnick.com
+//               info@tecnick.com
+//============================================================+
+
+/**
+ * Creates an example PDF TEST document using TCPDF
+ * @package com.tecnick.tcpdf
+ * @abstract TCPDF - Example: Document Encryption / Security
+ * @author Nicola Asuni
+ * @since 2008-03-04
+ */
+
+// Include the main TCPDF library (search for installation path).
+require_once('tcpdf_include.php');
+
+// create new PDF document
+$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
+
+
+// *** Set PDF protection (encryption) *********************
+
+/*
+  The permission array is composed of values taken from the following ones (specify the ones you want to block):
+	- print : Print the document;
+	- modify : Modify the contents of the document by operations other than those controlled by 'fill-forms', 'extract' and 'assemble';
+	- copy : Copy or otherwise extract text and graphics from the document;
+	- annot-forms : Add or modify text annotations, fill in interactive form fields, and, if 'modify' is also set, create or modify interactive form fields (including signature fields);
+	- fill-forms : Fill in existing interactive form fields (including signature fields), even if 'annot-forms' is not specified;
+	- extract : Extract text and graphics (in support of accessibility to users with disabilities or for other purposes);
+	- assemble : Assemble the document (insert, rotate, or delete pages and create bookmarks or thumbnail images), even if 'modify' is not set;
+	- print-high : Print the document to a representation from which a faithful digital copy of the PDF content could be generated. When this is not set, printing is limited to a low-level representation of the appearance, possibly of degraded quality.
+	- owner : (inverted logic - only for public-key) when set permits change of encryption and enables all other permissions.
+
+ If you don't set any password, the document will open as usual.
+ If you set a user password, the PDF viewer will ask for it before displaying the document.
+ The master (owner) password, if different from the user one, can be used to get full document access.
+
+ Possible encryption modes are:
+ 	0 = RSA 40 bit
+ 	1 = RSA 128 bit
+ 	2 = AES 128 bit
+ 	3 = AES 256 bit
+
+ NOTES:
+ - To create self-signed signature: openssl req -x509 -nodes -days 365000 -newkey rsa:1024 -keyout tcpdf.crt -out tcpdf.crt
+ - To export crt to p12: openssl pkcs12 -export -in tcpdf.crt -out tcpdf.p12
+ - To convert pfx certificate to pem: openssl pkcs12 -in tcpdf.pfx -out tcpdf.crt -nodes
+
+*/
+
+$pdf->SetProtection(array('print', 'copy'), '', null, 0, null);
+
+// Example with public-key
+// To open the document you need to install the private key (tcpdf.p12) on the Acrobat Reader. The password is: 1234
+//$pdf->SetProtection($permissions=array('print', 'copy'), $user_pass='', $owner_pass=null, $mode=1, $pubkeys=array(array('c' => 'file://../config/cert/tcpdf.crt', 'p' => array('print'))));
+
+// *********************************************************
+
+
+// set document information
+$pdf->SetCreator(PDF_CREATOR);
+$pdf->SetAuthor('Nicola Asuni');
+$pdf->SetTitle('TCPDF Example 016');
+$pdf->SetSubject('TCPDF Tutorial');
+$pdf->SetKeywords('TCPDF, PDF, example, test, guide');
+
+// set default header data
+$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 016', PDF_HEADER_STRING);
+
+// set header and footer fonts
+$pdf->setHeaderFont(Array('helvetica', '', PDF_FONT_SIZE_MAIN));
+$pdf->setFooterFont(Array('helvetica', '', PDF_FONT_SIZE_DATA));
+
+// set default monospaced font
+$pdf->SetDefaultMonospacedFont(PDF_FONT_MONOSPACED);
+
+// set margins
+$pdf->SetMargins(PDF_MARGIN_LEFT, PDF_MARGIN_TOP, PDF_MARGIN_RIGHT);
+$pdf->SetHeaderMargin(PDF_MARGIN_HEADER);
+$pdf->SetFooterMargin(PDF_MARGIN_FOOTER);
+
+// set auto page breaks
+$pdf->SetAutoPageBreak(TRUE, PDF_MARGIN_BOTTOM);
+
+// set image scale factor
+$pdf->setImageScale(PDF_IMAGE_SCALE_RATIO);
+
+// set some language-dependent strings (optional)
+if (@file_exists(dirname(__FILE__).'/lang/eng.php')) {
+	require_once(dirname(__FILE__).'/lang/eng.php');
+	$pdf->setLanguageArray($l);
+}
+
+// ---------------------------------------------------------
+
+// set font
+$pdf->SetFont('times', '', 16);
+
+// add a page
+$pdf->AddPage();
+
+// set some text to print
+$txt = <<<EOD
+Encryption Example
+
+Consult the source code documentation for the SetProtection() method.
+EOD;
+
+// print a block of text using Write()
+$pdf->Write(0, $txt, '', 0, 'L', true, 0, false, false, 0);
+
+
+// ---------------------------------------------------------
+
+//Close and output PDF document
+$pdf->Output('example_016.pdf', 'D');
+
+//============================================================+
+// END OF FILE
+//============================================================+