(PHP Extension) Create PKCS7 Signed File (.p7m)

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the signature.

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

<?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();

$certStore = new CkCertStore();

// Load a PFX file into a certificate store object.
$success = $certStore->LoadPfxFile('myPfx.pfx','pfxPassword');
if ($success != true) {
    print $certStore->lastErrorText() . "\n";
    exit;
}

// Get the certificate by subject common name.
// This should be the cert within the PFX that also
// has a private key (also stored within the PFX).
// cert is a CkCert
$cert = $certStore->FindCertBySubjectCN('myCert');
if ($certStore->get_LastMethodSuccess() == false) {
    print $certStore->lastErrorText() . "\n";
    exit;
}

// Tell the crypt object to use the certificate for signing:
$success = $crypt->SetSigningCert($cert);

// Sign a file, producing a .p7m as output.
// The input file is unchanged, the test.p7m contains the 
// contents of the input file and the signature.
$inFile = 'test.txt';
$outFile = 'testp7m';
$success = $crypt->CreateP7M($inFile,$outFile);
if ($success != true) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

print 'Success!' . "\n";

?>