Rust

Use a Smart Card Certificate + Private Key for SSL/TLS Authentication

See more ScMinidriver Examples

Demonstrates how to use a certificate + private key located on a smart card for the TLS client certificate in an HTTPS request.

Note: This example only works on Windows. ScMinidriver is a Windows-specific smart card and USB token minidriver that enables smart card authentication and cryptographic operations within Windows operating systems.

Rust

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

let scmd = chilkat::ScMinidriver::new();

// Reader names (smart card readers or USB tokens) can be discovered
// via List Readers or Find Smart Cards
let reader_name = "SCM Microsystems Inc. SCR33x USB Smart Card Reader 0".to_string();
if scmd.acquire_context(&reader_name).is_err() {
    println!("{}", scmd.last_error_text());
    return;
}

// If successful, the name of the currently inserted smart card is available:
println!("Card name: {}", scmd.card_name());

// If desired, perform regular PIN authentication with the smartcard.
// For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
let retval = scmd.pin_authenticate("user", "000000");
if retval != 0 {
    println!("PIN Authentication failed.");
}

// You can find a cerficate using any of the following certificate parts:
// "subjectDN" -- The full distinguished name of the cert.
// "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
// "subjectCN" -- The common name part (CN) of the certificate's subject.
// "serial" -- The certificate serial number.
// "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
// These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
// See List Certificates on Smart Card Example
let cert_part = "subjectCN".to_string();
let part_value = "BadSSL Client Certificate".to_string();

// If the certificate is found, it is loaded into the cert object.
// Note: We imported this certificate from a .p12/.pfx using this Example to Import a .pfx/.p12 onto a Smart Card
let cert = chilkat::Cert::new();
if scmd.find_cert(&cert_part, &part_value, &cert).is_err() {
    println!("Failed to find the certificate.");
    let _ = scmd.delete_context();
    return;
}

println!("Successfully loaded the cert object from the smart card / USB token.");

// Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
// The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
// If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
// because the smart card ScMinidriver session will no longer be authenticated or deleted.

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

// Send an HTTPS request to https://client.badssl.com
// https://client.badssl.com (part of the badssl.com service) lets you test authentication using client SSL certificates. 
// The client certificate can be downloaded from https://badssl.com/download/.
// This server returns 200 OK if the correct client certificate is provided, and 400 Bad Request otherwise.

let http = chilkat::Http::new();

// Provide the client certificate (linked internally to our authenticated smartcard session)
if http.set_ssl_client_cert(&cert).is_err() {
    println!("{}", http.last_error_text());
    let _ = scmd.delete_context();
    return;
}

let Ok(response_body) = http.quick_get_str("https://client.badssl.com/") else {
    println!("{}", http.last_error_text());
    let _ = scmd.delete_context();
    return;
};

println!("Response status code: {}", http.last_status());
println!("Response body: ");
println!("{}", response_body);

// ------------------------------------------------------------------------------------------------------------
// Cleanup our ScMinidriver session...

// When finished with operations that required authentication, you may if you wish, deauthenticate the session.
if scmd.pin_deauthenticate("user").is_err() {
    println!("{}", scmd.last_error_text());
}

// Delete the context when finished with the card.
if scmd.delete_context().is_err() {
    println!("{}", scmd.last_error_text());
}