(Perl) Add a Document Timestamp Signature to an already-signed PDF

See more PDF Signatures Examples

Demonstrates how to add a document timestamp signature to an already-signed PDF.

Note: This example requires Chilkat v9.5.0.99 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.

$pdf = chilkat::CkPdf->new();

# Load the PDF that has already been signed.
$success = $pdf->LoadFile("qa_data/pdf/helloWorld_signed.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

$json = chilkat::CkJsonObject->new();

$json->UpdateBool("invisibleSignature",1);
$json->UpdateString("subFilter","/ETSI.RFC3161");

$json->UpdateBool("timestampToken.enabled",1);

# In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server.
$json->UpdateString("timestampToken.tsaUrl","http://timestamp.digicert.com");

# If the timestamp server requires a username/password, do the following.  Otherwise omit the following few lines of code.
$json->UpdateString("timestampToken.tsaUsername","the_tsa_username");
$json->UpdateString("timestampToken.tsaPassword","the_tsa_password");

# When requesting the timestamp token, ask the server to include its certificate in the timestamp token response.
# This allows for the timestamp server's certificate to be included in the LTV validation (i.e. if the timestamp server
# has an OCSP URL, then Chilkat will also do the OCSP request for the timestamp server's certificate.)
$json->UpdateBool("timestampToken.requestTsaCert",1);

$success = $pdf->SignPdf($json,"c:/temp/qa_output/helloWorld_signed_2.pdf");
if ($success == 0) {
    print $pdf->lastErrorText() . "\r\n";
    exit;
}

print "Successfully added a Document Timestamp Signature to the PDF" . "\r\n";