php实现往pdf中加数字签名操作示例【附源码下载】

本文实例讲述了php实现往pdf中加数字签名操作。分享给大家供大家参考，具体如下：

//============================================================+// File name  : example_052.php// Begin    : 2009-05-07// Last Update : 2013-05-14//// Description : Example 052 for TCPDF class//        Certification Signature (experimental)//// 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: Certification Signature (experimental) * @author Nicola Asuni * @since 2009-05-07 */// Include the main TCPDF library (search for installation path).require_once('tcpdf_include.php');// create new PDF document$pdf = new TCPDF(PDF_PAGE_ORIENTATION, PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);// set document information$pdf->SetCreator(PDF_CREATOR);$pdf->SetAuthor('Nicola Asuni');$pdf->SetTitle('TCPDF Example 052');$pdf->SetSubject('TCPDF Tutorial');$pdf->SetKeywords('TCPDF, PDF, example, test, guide');// set default header data$pdf->SetHeaderData(PDF_HEADER_LOGO, PDF_HEADER_LOGO_WIDTH, PDF_HEADER_TITLE.' 052', PDF_HEADER_STRING);// set header and footer fonts$pdf->setHeaderFont(Array(PDF_FONT_NAME_MAIN, '', PDF_FONT_SIZE_MAIN));$pdf->setFooterFont(Array(PDF_FONT_NAME_DATA, '', PDF_FONT_SIZE_DATA));// set default monospaced font$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);}// ---------------------------------------------------------/*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*/// set certificate file$certificate = 'file://data/cert/tcpdf.crt';$certificate = 'file://'.realpath('./data/cert/tcpdf.crt');// set additional information$info = array( 'Name' => 'TCPDF', 'Location' => 'Office', 'Reason' => 'Testing TCPDF', 'ContactInfo' => 'http://www.tcpdf.org', );// set document signature$pdf->setSignature($certificate, $certificate, 'tcpdfdemo', '', 2, $info);// set font$pdf->SetFont('helvetica', '', 12);// add a page$pdf->AddPage();// print a line of text$text = 'This is a <b color="#FF0000">digitally signed document</b> using the default (example) <b>tcpdf.crt</b> certificate.<br />To validate this signature you have to load the <b color="#006600">tcpdf.fdf</b> on the Arobat Reader to add the certificate to <i>List of Trusted Identities</i>.<br /><br />For more information check the source code of this example and the source code documentation for the <i>setSignature()</i> method.<br /><br /><a href="http://www.tcpdf.org" rel="external nofollow" >www.tcpdf.org</a>';$pdf->writeHTML($text, true, 0, true, 0);// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// *** set signature appearance ***// create content for signature (image and/or text)$pdf->Image('images/tcpdf_signature.png', 180, 60, 15, 15, 'PNG');// define active area for signature appearance$pdf->setSignatureAppearance(180, 60, 15, 15);// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// *** set an empty signature appearance ***$pdf->addEmptySignatureAppearance(180, 80, 15, 15);// ---------------------------------------------------------//Close and output PDF document$pdf->Output('example_052.pdf', 'D');//============================================================+// END OF FILE//============================================================+