Validate a JWS with a Public Key

See more JSON Web Signatures (JWS) Examples

Demonstrates Jws.SetPublicKey, which sets the public key used to validate a signature of a loaded JWS.

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();

// Load the JWS compact serialization.
let jws_compact = "eyJhbGciOiJIUzI1NiJ9.VGhpcyBpcyB0aGUgY29udGVudCB0byBzaWduLg.<signature>".to_string();
if jws.load_jws(&jws_compact).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 public key and set it for validating signature 0.
let pub_key = chilkat::PublicKey::new();
if pub_key.load_from_file("qa_data/signer_pubkey.pem").is_err() {
    println!("{}", pub_key.last_error_text());
    return;
}

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

// Validate the signature.  Validate returns 1 when valid, 0 when not, or a negative value on error.
let v = jws.validate(0);
if v < 0 {
    println!("{}", jws.last_error_text());
    return;
}

if v != 1 {
    println!("The signature is not valid.");
    return;
}

println!("The signature is valid.");