PHP

Create a CAdES-T Signature

See more CAdES Examples

Demonstrates how to create a signature with an external timestamp that certifies the time of signing. This requires an online TSA (Time Stamping Authority) service that is capable of producing RFC 3161 compliant timestamps.

Note: This example requires Chilkat v9.5.0.78 or greater.

Chilkat2 PHP

<?php

use Chilkat2\Cert;
use Chilkat2\Crypt2;
use Chilkat2\JsonObject;

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

$crypt = new Crypt2();

// This example will use a certificate + private key from a .pfx/.p12 file.
// On Windows systems, it is also possible to use certs on smartcards/usb tokens or certs pre-installed in the Windows registry.
$cert = new Cert();

$pfxPath = 'qa_data/pfx/myCertAndKey.p12';
$pfxPassword = 'test123';

try {
    $cert->LoadPfxFile($pfxPath, $pfxPassword);

    $crypt->SetSigningCert($cert);

    // Use SHA-256 rather than the default of SHA-1
    $crypt->HashAlgorithm = 'sha256';

    // Create JSON that tells Chilkat what signing attributes to include:
    $attrs = new JsonObject();
    $attrs->UpdateBool('contentType', true);
    $attrs->UpdateBool('signingTime', true);
    $attrs->UpdateBool('messageDigest', true);
    $attrs->UpdateBool('signingCertificateV2', true);

    // A CAdES-T signature is one that includes a timestampToken created by an online TSA (time stamping authority).
    // We must include the TSA's URL, as well as a few options to indicate what is desired.
    // Except for the TSA URL, the options shown here are typically what you would need.
    $attrs->UpdateBool('timestampToken.enabled', true);
    $attrs->UpdateString('timestampToken.tsaUrl', 'https://freetsa.org/tsr');
    $attrs->UpdateBool('timestampToken.addNonce', false);
    $attrs->UpdateBool('timestampToken.requestTsaCert', true);
    $attrs->UpdateString('timestampToken.hashAlg', 'sha256');

    $crypt->SigningAttributes = $attrs->Emit();

    $inFile = 'qa_data/json/sample.json';
    $outFile = 'qa_output/sample_cades_t.p7m';

    // This creates the CAdES-T signature.  During the signature creation, it
    // communicates with the TSA to get a timestampToken.
    $crypt->CreateP7M($inFile, $outFile);
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

echo "Success.\n";