Rust

PKCS11 Sign PDF using Certificate and Private Key on Smart Card / USB Token

See more PKCS11 Examples

Sample code showing how to use PKCS11 to sign a PDF with a certificate and private key stored on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.96 or later.

Rust

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

// Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

let pkcs11 = chilkat::Pkcs11::new();

pkcs11.set_shared_lib_path("C:/Program Files (x86)/Gemalto/IDGo 800 PKCS#11/IDPrimePKCS1164.dll");
let pin = "0000".to_string();
let user_type = 1;

// Establish a PKCS11 logged-on session using the driver (.so, .dylib, or .dll) as specified in the SharedLibPath above.
if pkcs11.quick_session(user_type, &pin).is_err() {
    println!("{}", pkcs11.last_error_text());
    return;
}

// Get the certificate (on the smart card) that has a private key.
// There are other ways to locate a certificate on the HSM.
// This example assumes there is a single certificate w/ private key.
let cert = chilkat::Cert::new();
if pkcs11.find_cert("privateKey", "", &cert).is_ok() {
    println!("Cert with private key: {}", cert.subject_cn());
} else {
    println!("No certificates having a private key were found.");
    let _ = pkcs11.close_session().is_ok();
    return;
}

// --------------------------------------------------------------------------
// At this point, we have the cert to be used for signing.
// Our PDF signing code is the same as for a cert obtained from any other source..

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

// Load a PDF to be signed.
if pdf.load_file("qa_data/pdf/hello.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

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

let _ = json.update_int("page", 1);
let _ = json.update_string("appearance.y", "top");
let _ = json.update_string("appearance.x", "left");
let _ = json.update_string("appearance.fontScale", "10.0");
let _ = json.update_string("signingAlgorithm", "pss");
let _ = json.update_string("hashAlgorithm", "sha256");

let mut i = 0;
json.set_i(i);
let _ = json.update_string("appearance.text[i]", "Digitaly signed by: Xyz Widgets, Inc.");
i = i + 1;
json.set_i(i);
let _ = json.update_string("appearance.text[i]", "current_dt");
i = i + 1;
json.set_i(i);
let _ = json.update_string("appearance.text[i]", "blah blah blah");

// The certificate is internally linked to the Pkcs11 object, which is currently in an authenticated session.
let _ = pdf.set_signing_cert(&cert).is_ok();

if pdf.sign_pdf(&json, "qa_output/out.pdf").is_err() {
    println!("{}", pdf.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

// --------------------------------------------------------------------------

// Revert to an unauthenticated session by calling Logout.
if pkcs11.logout().is_err() {
    println!("{}", pkcs11.last_error_text());
    let _ = pkcs11.close_session().is_ok();
    return;
}

// When finished, close the session.
// It is important to close the session (memory leaks will occur if the session is not properly closed).
if pkcs11.close_session().is_err() {
    println!("{}", pkcs11.last_error_text());
    return;
}

println!("Success.");