(PHP ActiveX) Verify XML Digital Signature

Verifies XML signatures in an XML file.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbXml = new COM("Chilkat.StringBuilder");
$success = $sbXml->LoadFile('qa_data/xml_dsig_verify/csioz_sample.xml','utf-8');
if ($success != 1) {
    print 'Failed to load XML file.' . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.XmlDSig')
$dsig = new COM("Chilkat.XmlDSig");

// First load the XML containing the signatures to be verified.
$success = $dsig->LoadSignatureSb($sbXml);
if ($success != 1) {
    print $dsig->LastErrorText . "\n";
    exit;
}

// It's possible that an XML document can contain multiple signatures.
// Each can be verified as follows:
$i = 0;
while ($i < $dsig->NumSignatures) {
    // Select the Nth signature by setting the Selector property.
    $dsig->Selector = $i;

    // The bVerifyReferenceDigests argument determines if we want
    // to also verify each reference digest.  If set to 0,
    // then only the SignedInfo part of the Signature is verified.
    $bVerifyReferenceDigests = 1;
    $bVerified = $dsig->VerifySignature($bVerifyReferenceDigests);
    print 'Signature ' . ($i + 1) . ' verified = ' . $bVerified . "\n";

    $i = $i + 1;
}


?>