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(PHP Extension) CoSign PKCS7/CMS Signed DataSee more Digital Signatures ExamplesDemonstrates how to add a 2nd signature to a CMS SignedData. This is to add an additional signature, SignerInfo and certificate(s) to an existing CMS signed data. In this example, we cosign an existing pdf.p7s Note: The CoSign method is added in Chilkat v9.5.0.89.
<?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 assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $crypt = new CkCrypt2(); $cert = new CkCert(); // If loading from a smart card, set the smartcard PIN. $cert->put_SmartCardPin('0000'); // Load a certificate in some way, such as from a smart card. // Chilkat provides other methods to load from a .pfx, .pem, or from the Windows certificate stores.. $success = $cert->LoadFromSmartcard(''); if ($success == false) { print $cert->lastErrorText() . "\n"; exit; } $success = $crypt->SetSigningCert($cert); if ($success == false) { print $crypt->lastErrorText() . "\n"; exit; } // Load the file to be co-signed. // NOTE: This is to cosign a PDF file contained within a CMS (PKCS7) message. // (In other words, the PDF is contained within the CMS SignedData, rather than the other way around // where a CMS signature is contained within a PDF. Use Chilkat's PDF class to sign a PDF, which is // to embed a CMS signature within the PDF.) $bd = new CkBinData(); $success = $bd->LoadFile('qa_data/p7s/cosign/sample.pdf.p7s'); if ($success == false) { print 'Failed to load pdf.p7s input file.' . "\n"; exit; } // bd2 will contain the co-signed result. $bd2 = new CkBinData(); $success = $crypt->CoSign($bd,$cert,$bd2); if ($success == false) { print $crypt->lastErrorText() . "\n"; exit; } $success = $bd->WriteFile('qa_output/cosigned.pdf.p7s'); if ($success == false) { print 'Failed to save pdf.p7s output file.' . "\n"; exit; } print 'Success!' . "\n"; ?> |
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