Perl Requires Chilkat v9.5.0.78+

Sign String to create a CAdES-T Signature

See more CAdES Examples

This example will sign a string to create a CAdEST-T signature. Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

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

my $crypt = Chilkat2::Crypt2->new;

# This example will use the certificate + private key currently inserted into a smartcard reader.
my $cert = Chilkat2::Cert->new;

# If we wish to provide the smartcard PIN (otherwise the user will be prompted by the operating system).
$cert->SmartCardPin('000000');
my $success = $cert->LoadFromSmartcard('');
if (!$success) {
    print $cert->LastErrorText, "\n";
    exit;
}

# Note: It is also possible to use certs from .pfx/.p12, .pem, or other sources such as
# pre-installed Windows certificates.

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

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

# Create JSON that tells Chilkat what signing attributes to include:
my $attrs = Chilkat2::JsonObject->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');

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

my $strToSign = 'THIS IS MY ID';

my $bd = Chilkat2::BinData->new;
$bd->AppendString($strToSign, 'utf-8');

# This creates the CAdES-T signature.  During the signature creation, it
# communicates with the TSA to get a timestampToken.
# The contents of bd are signed and replaced with the CAdES-T signature (which embeds the original content).
$success = $crypt->OpaqueSignBd($bd);
if (!$success) {
    print $crypt->LastErrorText, "\n";
    exit;
}

# Get the signature in base64 format:
print $bd->GetEncoded('base64_mime'), "\n";

# Or save the signature to a file.
$bd->WriteFile('qa_output/cades-t_sample.p7m');

print "Success.\n";