php实现往pdf中加数字签名操作示例【附源码下载】

php实现往实现往pdf中加数字签名操作示例【附源码下载】中加数字签名操作示例【附源码下载】

主要介绍了php实现往pdf中加数字签名操作,结合完整实例形式详细分析了php基于tcpdf插件实现数字签名操作的具体步骤与相关技巧,并附带crt加密文件、源码等供读者下载,需要

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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

// (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)

$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->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);

- 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',

// add a page

$pdf->AddPage();

// print a line of text

$text = 'This is a <b color="#FF0000">digitally signed document using the default (example) tcpdf.crt certificate.<br />To validate this signature you have to load the <b color="#006600">tcpdf.fdf 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->Output('example_052.pdf', 'D');

//============================================================+

// END OF FILE

//============================================================+

其中tcpdf_include.php文件(源自tcpdf插件)如下：

<?php

//============================================================+

// File name : tcpdf_include.php

// Begin : 2008-05-14

// Last Update : 2014-12-10

// Nicola Asuni

// Tecnick.com LTD

// www.tecnick.com

// info@tecnick.com

//============================================================+

/**

* Search and include the TCPDF library.

* @package com.tecnick.tcpdf

* @abstract TCPDF - Include the main class.

* @author Nicola Asuni