(Perl) Create a CAdES-T Signature

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.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$crypt = chilkat::CkCrypt2->new();

# 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 = chilkat::CkCert->new();

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

$success = $cert->LoadPfxFile($pfxPath,$pfxPassword);
if ($success != 1) {
    print $cert->lastErrorText() . "\r\n";
    exit;
}

$success = $crypt->SetSigningCert($cert);

# Use SHA-256 rather than the default of SHA-1
$crypt->put_HashAlgorithm("sha256");

# Create JSON that tells Chilkat what signing attributes to include:
$attrs = chilkat::CkJsonObject->new();
$attrs->UpdateBool("contentType",1);
$attrs->UpdateBool("signingTime",1);
$attrs->UpdateBool("messageDigest",1);
$attrs->UpdateBool("signingCertificateV2",1);

# 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",1);
$attrs->UpdateString("timestampToken.tsaUrl","https://freetsa.org/tsr");
$attrs->UpdateBool("timestampToken.addNonce",0);
$attrs->UpdateBool("timestampToken.requestTsaCert",1);
$attrs->UpdateString("timestampToken.hashAlg","sha256");

$crypt->put_SigningAttributes($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.
$success = $crypt->CreateP7M($inFile,$outFile);
if ($success != 1) {
    print $crypt->lastErrorText() . "\r\n";
    exit;
}

print "Success." . "\r\n";