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(PHP Extension) RSA Sign using Private Key of Certificate Type A3 (smart card / token)

Demonstrates RSA signing data using the private key of a certificate type A3 (smart card, token).

Note: This is a Windows-only example.

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MAC OS X,
Alpine Linux, Solaris, OpenBSD, FreeBSD,
and Linux armhf/aarch64

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

//  First get the A3 certificate that was installed on the Windows system.
$certStore = new CkCertStore();

$thumbprint = '12c1dd8015f3f03f7b1fa619dc24e2493ca8b4b2';

//  This is specific to Windows because it is opening the Windows Current-User certificate store.
$bReadOnly = true;
$success = $certStore->OpenCurrentUserStore($bReadOnly);
if ($success != true) {
    print $certStore->lastErrorText() . "\n";
    exit;
}

//  Find the certificate with the desired thumbprint
//  (There are many ways to locate a certificate.  This example chooses to find by thumbprint.)
// cert is a CkCert
$cert = $certStore->FindCertBySha1Thumbprint($thumbprint);
if ($certStore->get_LastMethodSuccess() != true) {
    print 'Failed to find the certificate.' . "\n";
    exit;
}

print 'Found: ' . $cert->subjectCN() . "\n";

$rsa = new CkRsa();

//  Provide the cert's private key
$bUsePrivateKey = true;
$success = $rsa->SetX509Cert($cert,$bUsePrivateKey);

if ($success != true) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

//  Now we're ready to sign..
$dataToSign = new CkByteData();
$sigData = new CkByteData();

//  Get bytes to be signed..
$fac = new CkFileAccess();
$success = $fac->ReadEntireFile('in.dat',$dataToSign);

$success = $rsa->SignBytes($dataToSign,'SHA-256',$sigData);
if ($success != true) {
    print $rsa->lastErrorText() . "\n";
    exit;
}

print 'Signature created.' . "\n";

?>

 

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