Rust

Get ECC Public Key in JWK Format (JSON Web Key)

See more ECC Examples

Demonstrates how to get an ECC public key in JWK (JSON Web Key) format.

Note: This example requires Chilkat v9.5.0.66 or later.

Rust

// Note: This example requires Chilkat v9.5.0.66 or later.

// Load a PEM file into memory.
let sb_pem = chilkat::StringBuilder::new();
if sb_pem.load_file("qa_data/pem/ecc_public.pem", "utf-8").is_err() {
    println!("Failed to load PEM file.");
    return;
}

// Load the PEM into a public key object.
let pub_key = chilkat::PublicKey::new();
if pub_key.load_from_string(&sb_pem.get_as_string().unwrap_or_default()).is_err() {
    println!("{}", pub_key.last_error_text());
    return;
}

// Get the public key in JWK format:
let jwk = pub_key.get_jwk().unwrap_or_default();

// The GetJwk method will return the JWK in the most compact JSON format possible,
// as a single line with no extra whitespace.  To get a more human-readable JWK (for this example),
// load into a Chilkat JSON object and emit non-compact:

let json = chilkat::JsonObject::new();
let _ = json.load(&jwk);
json.set_emit_compact(false);
println!("ECC Public Key in JWK format:");
println!("{}", json.emit().unwrap_or_default());

// Sample output:
// { 
//   "kty": "EC",
//   "crv": "P-256",
//   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU"
// }
// 
// Additional information can be added like this:
let _ = json.append_string("use", "enc");
let _ = json.append_string("kid", "123ABC");

// Now examine the JSON:
println!("{}", json.emit().unwrap_or_default());

// { 
//   "kty": "EC",
//   "crv": "P-256",
//   "x": "oBUyo8CQAFPeYPvv78ylh5MwFZjTCLQeb042TjiMJxE",
//   "y": "vvQyxZkUjJQUPU_0bCy3Pj5qQdfu8jwEfqEeYGZ95CU",
//   "use": "enc",
//   "kid": "123ABC"
// }