Rust

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.

Rust

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

let pdf = chilkat::Pdf::new();

// Load the PDF that has already been signed.
if pdf.load_file("qa_data/pdf/helloWorld_signed.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

let json = chilkat::JsonObject::new();

let _ = json.update_bool("invisibleSignature", true);
let _ = json.update_string("subFilter", "/ETSI.RFC3161");

let _ = json.update_bool("timestampToken.enabled", true);

// In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server.
let _ = json.update_string("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.
let _ = json.update_string("timestampToken.tsaUsername", "the_tsa_username");
let _ = json.update_string("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.)
let _ = json.update_bool("timestampToken.requestTsaCert", true);

if pdf.sign_pdf(&json, "c:/temp/qa_output/helloWorld_signed_2.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    return;
}

println!("Successfully added a Document Timestamp Signature to the PDF");