Add VRI to an Existing PDF Document
This demo will add VRI information to an already signed PDF document to gain LTV level.
The document includes a signature including a timestamp. VRI will be resolved and embedded for both.
PHP
<?php
use setasign\SetaPDF2\Core\Document;
use setasign\SetaPDF2\Core\Writer\HttpWriter;
use setasign\SetaPDF2\Signer\DocumentSecurityStore;
use setasign\SetaPDF2\Signer\ValidationRelatedInfo\Collector;
use setasign\SetaPDF2\Signer\ValidationRelatedInfo\Exception as ValidationRelatedInfoException;
// load and register the autoload function
require_once __DIR__ . '/../../../../../bootstrap.php';
// create an HTTP writer
$writer = new HttpWriter('Laboratory-Report-signed-LTV.pdf');
// let's get the document
$document = Document::loadByFilename(
$assetsDirectory . '/pdfs/tektown/Laboratory-Report-signed-no-LTV.pdf', $writer
);
// define a trust-store
$trustedCerts = new \setasign\SetaPDF2\Signer\X509\Collection();
$trustedCerts->addFromFile($assetsDirectory . '/certificates/trusted/Intesi Group EU Qualified Electronic Signature CA G2.cer');
$fieldName = 'Signature1';
// create a VRI collector instance
$collector = new Collector($trustedCerts);
// get VRI for the signature
try {
$vri = $collector->getByFieldName($document, $fieldName);
} catch (ValidationRelatedInfoException $e) {
echo 'Unable to create VRI data: ' . $e->getMessage();
die();
}
// Use this snipped to trace the process of resolving VRI:
//foreach ($collector->getLogger()->getLogs() as $log) {
// echo str_repeat(' ', $log->getDepth()*4);
// echo $log->getMessage().'<br/>';
//}
// and add it to the document.
$dss = new DocumentSecurityStore($document);
$dss->addValidationRelatedInfoByFieldName(
$fieldName,
$vri->getCrls(),
$vri->getOcspResponses(),
$vri->getCertificates()
);
// this is needed for Adobe Acrobat for some signatures (this one, too)
foreach ($vri->getOcspResponses() as $ocspResponse) {
$key = $dss->getVriName($ocspResponse);
$dss->addValidationRelatedInfo($key, [], [], [], new DateTime());
}
// save and finish the final document
$document->save()->finish();