PHP Extension

PKCS11 Sign PDF with Smart Card with 2 PINs

See more PKCS11 Examples

Shows how to sign a PDF using a smart card that has one pin for USER, and a 2nd PIN for signing.

Note: This example requires Chilkat v9.5.0.96 or later.

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.

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

$pkcs11 = new CkPkcs11();

$pkcs11->put_SharedLibPath('C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll');

// --------------------------
// Provide the user PIN here.
// --------------------------
$user_pin = '0000';
$userType = 1;

// Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
$success = $pkcs11->QuickSession($userType,$user_pin);
if ($success == false) {
    print $pkcs11->lastErrorText() . "\n";
    exit;
}

// -----------------------------------------------------------
// Also indicate the context-specific PIN required for signing.
// This is a new feature added in Chilkat v9.5.0.97
// -----------------------------------------------------------
$pkcs11->put_SigContextPin('1234');

// Get the certificate (on the smart card) that has a private key.
// There are other ways to locate a certificate on the HSM.
// This example assumes there is a single certificate w/ private key.
$cert = new CkCert();
$success = $pkcs11->FindCert('privateKey','',$cert);
if ($success == true) {
    print 'Cert with private key: ' . $cert->subjectCN() . "\n";
}
else {
    print 'No certificates having a private key were found.' . "\n";
    $success = $pkcs11->CloseSession();
    exit;
}

// --------------------------------------------------------------------------
// At this point, we have the cert to be used for signing.
// Our PDF signing code is the same as for a cert obtained from any other source..

$pdf = new CkPdf();

// Load a PDF to be signed.
$success = $pdf->LoadFile('qa_data/pdf/hello.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    $success = $pkcs11->CloseSession();
    exit;
}

$json = new CkJsonObject();

$json->UpdateInt('page',1);
$json->UpdateString('appearance.y','top');
$json->UpdateString('appearance.x','left');
$json->UpdateString('appearance.fontScale','10.0');
$json->UpdateString('signingAlgorithm','pss');
$json->UpdateString('hashAlgorithm','sha256');

$i = 0;
$json->put_I($i);
$json->UpdateString('appearance.text[i]','Digitaly signed by: Xyz Widgets, Inc.');
$i = $i + 1;
$json->put_I($i);
$json->UpdateString('appearance.text[i]','current_dt');
$i = $i + 1;
$json->put_I($i);
$json->UpdateString('appearance.text[i]','blah blah blah');

// The certificate is internally linked to the Pkcs11 object, which is currently in an authenticated session.
$success = $pdf->SetSigningCert($cert);

$success = $pdf->SignPdf($json,'qa_output/out.pdf');
if ($success == false) {
    print $pdf->lastErrorText() . "\n";
    $success = $pkcs11->CloseSession();
    exit;
}

// --------------------------------------------------------------------------

// Revert to an unauthenticated session by calling Logout.
$success = $pkcs11->Logout();
if ($success == false) {
    print $pkcs11->lastErrorText() . "\n";
    $success = $pkcs11->CloseSession();
    exit;
}

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
$success = $pkcs11->CloseSession();
if ($success == false) {
    print $pkcs11->lastErrorText() . "\n";
    exit;
}

print 'Success.' . "\n";

?>