66 lines
2 KiB
JavaScript
66 lines
2 KiB
JavaScript
/*
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* Copyright (c) 2018-2019, 2023 Unrud <unrud@outlook.com>
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*
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* This file is part of Remote-Touchpad.
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*
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* Remote-Touchpad is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Remote-Touchpad is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Remote-Touchpad. If not, see <http://www.gnu.org/licenses/>.
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*/
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import jsSHA from "./sha256.mjs"
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const challengeResponse = (message, secret) => {
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const shaObj = new jsSHA("SHA-256", "TEXT");
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shaObj.setHMACKey(message, "TEXT");
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shaObj.update(secret);
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return btoa(shaObj.getHMAC("BYTES"));
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};
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export default class Socket extends EventTarget {
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#secret;
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#authenticated;
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#ws;
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constructor(url, secret) {
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super();
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this.#secret = secret;
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this.#authenticated = false;
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this.#ws = new WebSocket(url);
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this.#ws.addEventListener("message", this.#handle_ws_message.bind(this));
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this.#ws.addEventListener("close", this.#handle_ws_close.bind(this));
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}
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#handle_ws_message(event) {
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if (!this.#authenticated) {
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this.#ws.send(challengeResponse(event.data, this.#secret));
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this.#authenticated = true;
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return;
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}
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let config;
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try {
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config = JSON.parse(event.data);
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} catch (e) {
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this.#ws.close();
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throw (e);
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}
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this.dispatchEvent(new CustomEvent("config", {detail: config}));
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}
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#handle_ws_close() {
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this.dispatchEvent(new CustomEvent("close"));
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}
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send(message) {
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this.#ws.send(message);
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}
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}
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