Set the Optional JWS Unprotected Header

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetUnprotectedHeader, which sets the optional unprotected header for a signature.

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

// Protected header specifying HMAC-SHA256.
let header = chilkat::JsonObject::new();
let _ = header.update_string("alg", "HS256");
if jws.set_protected_header(0, &header).is_err() {
    println!("{}", jws.last_error_text());
    return;
}

// Set the optional unprotected header for signature 0.  Unlike the protected header, it is not
// covered by the signature.  It is carried in the JSON serialization forms of a JWS.
let unprotected = chilkat::JsonObject::new();
let _ = unprotected.update_string("kid", "signer-key-1");
if jws.set_unprotected_header(0, &unprotected).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;
}

let base64_key = "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXowMTIzNDU=".to_string();
if jws.set_mac_key(0, &base64_key, "base64").is_err() {
    println!("{}", jws.last_error_text());
    return;
}

// Because an unprotected header is present, the JWS is produced in a JSON serialization form.
let Ok(jws_json) = jws.create_jws() else {
    println!("{}", jws.last_error_text());
    return;
};

println!("{}", jws_json);