jiti-meet/react/features/base/jwt/functions.js

138 lines
4.2 KiB
JavaScript

/* @flow */
import jwtDecode from 'jwt-decode';
import { parseURLParams } from '../util';
import { MEET_FEATURES } from './constants';
/**
* Retrieves the JSON Web Token (JWT), if any, defined by a specific
* {@link URL}.
*
* @param {URL} url - The {@code URL} to parse and retrieve the JSON Web Token
* (JWT), if any, from.
* @returns {string} The JSON Web Token (JWT), if any, defined by the specified
* {@code url}; otherwise, {@code undefined}.
*/
export function parseJWTFromURLParams(url: URL = window.location) {
return parseURLParams(url, true, 'search').jwt;
}
/**
* Returns the user name after decoding the jwt.
*
* @param {Object} state - The app state.
* @returns {string}
*/
export function getJwtName(state: Object) {
const { user } = state['features/base/jwt'];
return user?.name;
}
/**
* Checks whether a given timestamp is a valid UNIX timestamp in seconds.
* We convert to miliseconds during the check since `Date` works with miliseconds for UNIX timestamp values.
*
* @param {any} timestamp - A UNIX timestamp in seconds as stored in the jwt.
* @returns {boolean} - Whether the timestamp is indeed a valid UNIX timestamp or not.
*/
function isValidUnixTimestamp(timestamp: any) {
return typeof timestamp === 'number' && timestamp * 1000 === new Date(timestamp * 1000).getTime();
}
/**
* Returns a list with all validation errors for the given jwt.
*
* @param {string} jwt - The jwt.
* @returns {Array<string>} - An array containing all jwt validation errors.
*/
export function validateJwt(jwt: string) {
const errors = [];
if (!jwt) {
return errors;
}
const currentTimestamp = new Date().getTime();
try {
const header = jwtDecode(jwt, { header: true });
const payload = jwtDecode(jwt);
if (!header || !payload) {
errors.push('- Missing header or payload');
return errors;
}
const { kid } = header;
// if Key ID is missing, we return the error immediately without further validations.
if (!kid) {
errors.push('- Key ID(kid) missing');
return errors;
}
// JaaS only
if (kid.startsWith('vpaas-magic-cookie')) {
if (kid.substring(0, header.kid.indexOf('/')) !== payload.sub) {
errors.push('- Key ID(kid) does not match sub');
}
if (payload.aud !== 'jitsi') {
errors.push('- invalid `aud` value. It should be `jitsi`');
}
if (payload.iss !== 'chat') {
errors.push('- invalid `iss` value. It should be `chat`');
}
if (!payload.context?.features) {
errors.push('- `features` object is missing from the payload');
}
}
if (!isValidUnixTimestamp(payload.nbf)) {
errors.push('- invalid `nbf` value');
} else if (currentTimestamp < payload.nbf * 1000) {
errors.push('- `nbf` value is in the future');
}
if (!isValidUnixTimestamp(payload.exp)) {
errors.push('- invalid `exp` value');
} else if (currentTimestamp > payload.exp * 1000) {
errors.push('- token is expired');
}
if (!payload.context) {
errors.push('- `context` object is missing from the payload');
} else if (payload.context.features) {
const { features } = payload.context;
Object.keys(features).forEach(feature => {
if (MEET_FEATURES.includes(feature)) {
const featureValue = features[feature];
// cannot use truthy or falsy because we need the exact value and type check.
if (
featureValue !== true
&& featureValue !== false
&& featureValue !== 'true'
&& featureValue !== 'false'
) {
errors.push(`- Invalid value for feature: ${feature}`);
}
} else {
errors.push(`- Invalid feature: ${feature}`);
}
});
}
} catch (e) {
errors.push(e ? e.message : '- unspecified jwt error');
}
return errors;
}