import {hobaResult, hobaToSign} from "./hoba.js";

const alg = '969';

export async function signChallenge(challenge, realm, origin, keyStore) {
	const fingerprint = keyStore.fingerprint();
	const nonce_array = new Uint8Array(32);
	crypto.getRandomValues(nonce_array);

	const kid_array = fingerprint;

	const a_kid = btoa(String.fromCharCode.apply(null, kid_array));
	const a_nonce = btoa(String.fromCharCode.apply(null, nonce_array));
	const a_challenge = btoa(challenge);
	const message = hobaToSign(a_nonce, a_kid, a_challenge, realm, origin, alg);
	console.debug('message to sign', challenge, realm, origin, message);

	const signature = await keyStore.sign(message);
	const a_signature = btoa(signature);

	const result = hobaResult(a_nonce, a_kid, a_challenge, a_signature);
	console.debug('result', result);
	return result;
}