(PHP Extension) Sign JSON to Create CAdES P7S Bytes

Demonstrates how to sign JSON using a certificate + private key from a .p12/.pfx to create a CAdES P7S byte array.

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<?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");

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

$crypt = new CkCrypt2();

$cert = new CkCert();
$success = $cert->LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

// Tell the crypt component to use this cert.
$success = $crypt->SetSigningCert($cert);
if ($success != true) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

// The CadesEnabled property applies to all methods that create PKCS7 signatures. 
// To create a CAdES-BES signature, set this property equal to true. 
$crypt->put_CadesEnabled(true);

$crypt->put_HashAlgorithm('sha256');

$jsonSigningAttrs = new CkJsonObject();
$jsonSigningAttrs->UpdateInt('contentType',1);
$jsonSigningAttrs->UpdateInt('signingTime',1);
$jsonSigningAttrs->UpdateInt('messageDigest',1);
$jsonSigningAttrs->UpdateInt('signingCertificateV2',1);
$crypt->put_SigningAttributes($jsonSigningAttrs->emit());

// By default, all the certs in the chain of authentication are included in the signature.
// If desired, we can choose to only include the signing certificate:
$crypt->put_IncludeCertChain(false);

// Create the CAdES-BES attached signature, which contains the original data.
$crypt->put_Charset('utf-8');
$cadesP7s = new CkByteData();
$success = $crypt->OpaqueSignString('{ \'abc\': 123}',$cadesP7s);
if ($crypt->get_LastMethodSuccess() == false) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

// Verify the signature and extract the original JSON:
$originalJson = $crypt->opaqueVerifyString($cadesP7s);
if ($crypt->get_LastMethodSuccess() == false) {
    print $crypt->lastErrorText() . "\n";
    exit;
}

print 'Original JSON: ' . $originalJson . "\n";

print 'Success!' . "\n";

?>