Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(PHP Extension) Sign PDF with Long-Term Validation (LTV Enabled)See more PDF Signatures ExamplesThis example demonstrates how to a sign a PDF with long-term validation (LTV) enabled. Note: This example requires Chilkat v9.5.0.85 or greater.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $pdf = new CkPdf(); // Load a PDF to be signed. // The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf $success = $pdf->LoadFile('qa_data/pdf/hello.pdf'); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } // Options for signing are specified in JSON. $json = new CkJsonObject(); // In most cases, the signingCertificateV2 and signingTime attributes are required. $json->UpdateInt('signingCertificateV2',1); $json->UpdateInt('signingTime',1); // Add the "ltvOcsp" instruction to the JSON passed to SignPdf. // This is what causes Chilkat to create an LTV-enabled signature. // // If we are signing a PDF that already has signatures, then the existing signatures // are automatically verified, and Chilkat will do OCSP certificate status checking (if possible) // for those certs in existing signatures (including certs in the certificate chains) // that do not yet have a valid OCSP response in the DSS (Document Security Store). // Chilkat will add the OCSP responses to the /OCSPs in the Document Security Store (/DSS). // Also, and certificates from existing signatures not yet in the DSS are added to the /Certs // in the DSS. // // Also, the "ltvOcsp" causes Chilkat to add the pdfRevocationInfoArchival authenticated attribute // to the CMS signature. The pdfRevocationInfoArchival attribute (1.2.840.113583.1.1.8) // contains OCSP responses and the CRL for the issuer of the signing certificate. // Therefore, Chilkat will send an OCSP request to the signing certificate's OCSP URl (if one exists) // and will download the CRL from the issuer certificate's CRL Distribution Point (if one exists). $json->UpdateBool('ltvOcsp',true); // ----------------------------------------------------------------------------------- // Note: If Chilkat produces a signed PDF, but the signature is not LTV-enabled, // the cause might be related to a failure to download CRL's or OCSP requests. // See Possible Solution for Failure to Produce LTV-enabled PDF Signature // ----------------------------------------------------------------------------------- // You can add the following to UncommonOptions to get detailed information about the CRL and OCSP requests // You shouldn't set the following logging options unless there is a need, because it adds a large amount of information to the LastErrorText. $pdf->put_UncommonOptions('LOG_OCSP_HTTP,LOG_CRL_HTTP'); // Define the appearance of the signature. $json->UpdateInt('page',1); $json->UpdateString('appearance.y','top'); $json->UpdateString('appearance.x','left'); $json->UpdateString('appearance.fontScale','10.0'); $json->UpdateString('appearance.text[0]','Digitally signed by: cert_cn'); $json->UpdateString('appearance.text[1]','current_dt'); $json->UpdateString('appearance.text[2]','This is an LTV-enabled signature.'); // Load the signing certificate. (Use your own certificate.) $cert = new CkCert(); $success = $cert->LoadPfxFile('qa_data/pfx/myPdfSigningCert.pfx','pfxPassword'); if ($success == false) { print $cert->lastErrorText() . "\n"; exit; } // Tell the pdf object to use the certificate for signing. $success = $pdf->SetSigningCert($cert); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } $success = $pdf->SignPdf($json,'qa_output/hello_ltv_signed.pdf'); if ($success == false) { print $pdf->lastErrorText() . "\n"; exit; } print 'The PDF has been successfully cryptographically signed with long-term validation.' . "\n"; // If you open the Signature Panel in Adobe Acrobat, it will indicate that the signature is LTV enabled // as shown here: ?> |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.