Sign a JWS with a Private Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPrivateKey, which sets the private key used to create a signature. The example uses RS256 (RSASSA-PKCS1-v1_5 with SHA-256).

The file path is relative to the application's current working directory. An absolute path may also be used. Supply the path appropriate to your own environment.

let jws = chilkat::Jws::new();

// Protected header specifying RSASSA-PKCS1-v1_5 with SHA-256 (RS256).
let header = chilkat::JsonObject::new();
let _ = header.update_string("alg", "RS256");
if jws.set_protected_header(0, &header).is_err() {
    println!("{}", jws.last_error_text());
    return;
}

let b_include_bom = false;
if jws.set_payload("This is the content to sign.", "utf-8", b_include_bom).is_err() {
    println!("{}", jws.last_error_text());
    return;
}

// The file path is relative to the application's current working directory.  An absolute path
// may also be used.  Supply the path appropriate to your own environment.
// Load the signer's private key and set it for signature 0.
let priv_key = chilkat::PrivateKey::new();
if priv_key.load_pem_file("qa_data/signer_privkey.pem").is_err() {
    println!("{}", priv_key.last_error_text());
    return;
}

if jws.set_private_key(0, &priv_key).is_err() {
    println!("{}", jws.last_error_text());
    return;
}

let Ok(jws_compact) = jws.create_jws() else {
    println!("{}", jws.last_error_text());
    return;
};

println!("{}", jws_compact);