(PHP ActiveX) Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

PHP ActiveX example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

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.FileAccess')
$fac = new COM("Chilkat.FileAccess");

$p7mBytes = $fac->ReadEntireFile('testData/p7m/fattura_signature.p7m');
if ($fac->LastMethodSuccess != 1) {
    print $fac->LastErrorText . "\n";
    exit;
}

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Crypt2')
$crypt = new COM("Chilkat.Crypt2");

$originalXml = $crypt->opaqueVerifyString($p7mBytes);
if ($crypt->LastMethodSuccess != 1) {
    print $fac->LastErrorText . "\n";
    exit;
}

print 'Original XML:' . "\n";
print $originalXml . "\n";

print 'Success!' . "\n";

?>