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(PHP ActiveX) 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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

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

$crypt = new COM("Chilkat_9_5_0.Crypt2");

$cert = new COM("Chilkat_9_5_0.Cert");
$success = $cert->LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if ($success != 1) {
    print $cert->LastErrorText . "\n";
    exit;
}

// Tell the crypt component to use this cert.
$success = $crypt->SetSigningCert($cert);
if ($success != 1) {
    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->CadesEnabled = 1;

$crypt->HashAlgorithm = 'sha256';

$jsonSigningAttrs = new COM("Chilkat_9_5_0.JsonObject");
$jsonSigningAttrs->UpdateInt('contentType',1);
$jsonSigningAttrs->UpdateInt('signingTime',1);
$jsonSigningAttrs->UpdateInt('messageDigest',1);
$jsonSigningAttrs->UpdateInt('signingCertificateV2',1);
$crypt->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->IncludeCertChain = 0;

// Create the CAdES-BES attached signature, which contains the original data.
$crypt->Charset = 'utf-8';

$cadesP7s = $crypt->OpaqueSignString('{ \'abc\': 123}');
if ($crypt->LastMethodSuccess == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

// Verify the signature and extract the original JSON:
$originalJson = $crypt->opaqueVerifyString($cadesP7s);
if ($crypt->LastMethodSuccess == 0) {
    print $crypt->LastErrorText . "\n";
    exit;
}

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

print 'Success!' . "\n";

?>

 

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