(PHP Extension) Extract a File from a .p7m (PKCS7 Signed-Data)

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PHP Extension example to extract the original file from a .p7m (Signed-Data PKCS7 Format) The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M.

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

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

$crypt = new CkCrypt2();

// What is a .p7m file?

$outputFile = '/Users/chilkat/testData/pdf/sample.pdf';
$inFile = '/Users/chilkat/testData/p7m/sample.pdf.p7m';

// Verify and restore the original file:
$success = $crypt->VerifyP7M($inFile,$outputFile);
if ($success == false) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

print 'Success!' . "\n";

?>