PHP Extension Requires Chilkat v10.1.2+

Create PKCS7 Signed File (.p7m)

See more Encryption Examples

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

<?php

include("chilkat.php");

$success = false;

//  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).
$jsonCN = new CkJsonObject();
$jsonCN->UpdateString('CN','myCert');
$cert = new CkCert();
$success = $certStore->FindCert($jsonCN,$cert);
if ($success == 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";

?>