106 lines
3.8 KiB
JavaScript
106 lines
3.8 KiB
JavaScript
import sha256 from 'crypto-js/sha256';
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import { cookieKeys, localStorageKeys } from './defaults';
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/**
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* Generates a 1-way hash, in order to be stored in local storage for authentication
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* @param {String} user The username of user
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* @returns {String} The hashed token
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*/
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const generateUserToken = (user) => sha256(user.toString()).toString().toLowerCase();
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/**
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* Checks if the user is currently authenticated
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* @param {Array[Object]} users An array of user objects pulled from the config
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* @returns {Boolean} Will return true if the user is logged in, else false
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*/
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export const isLoggedIn = (users) => {
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const validTokens = users.map((user) => generateUserToken(user));
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let userAuthenticated = false;
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document.cookie.split(';').forEach((cookie) => {
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if (cookie && cookie.split('=').length > 1) {
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const cookieKey = cookie.split('=')[0].trim();
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const cookieValue = cookie.split('=')[1].trim();
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if (cookieKey === cookieKeys.AUTH_TOKEN) {
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if (validTokens.includes(cookieValue)) {
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userAuthenticated = true;
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}
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}
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}
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});
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return userAuthenticated;
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};
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/**
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* Checks credentials entered by the user against those in the config
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* Returns an object containing a boolean indicating success/ failure
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* along with a message outlining what's not right
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* @param {String} username The username entered by the user
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* @param {String} pass The password entered by the user
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* @param {String[]} users An array of valid user objects
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* @returns {Object} An object containing a boolean result and a message
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*/
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export const checkCredentials = (username, pass, users) => {
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let response;
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if (!username) {
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response = { correct: false, msg: 'Missing Username' };
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} else if (!pass) {
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response = { correct: false, msg: 'Missing Password' };
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} else {
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users.forEach((user) => {
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if (user.user === username) {
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if (user.hash.toLowerCase() === sha256(pass).toString().toLowerCase()) {
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response = { correct: true, msg: 'Logging in...' };
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} else {
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response = { correct: false, msg: 'Incorrect Password' };
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}
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}
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});
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}
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return response || { correct: false, msg: 'User not found' };
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};
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/**
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* Sets the cookie value in order to login the user locally
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* @param {String} username - The users username
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* @param {String} pass - Password, not yet hashed
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* @param {Number} timeout - A desired timeout for the session, in ms
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*/
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export const login = (username, pass, timeout) => {
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const now = new Date();
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const expiry = new Date(now.setTime(now.getTime() + timeout)).toGMTString();
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const userObject = { user: username, hash: sha256(pass).toString().toLowerCase() };
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document.cookie = `authenticationToken=${generateUserToken(userObject)};`
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+ `${timeout > 0 ? `expires=${expiry}` : ''}`;
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localStorage.setItem(localStorageKeys.USERNAME, username);
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};
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/**
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* Removed the browsers cookie, causing user to be logged out
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*/
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export const logout = () => {
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document.cookie = 'authenticationToken=null';
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localStorage.removeItem(localStorageKeys.USERNAME);
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};
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/**
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* Checks if the current user has admin privileges.
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* If no users are setup, then function will always return true
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* But if auth is configured, then will verify user is correctly
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* logged in and then check weather they are of type admin, and
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* return false if any conditions fail
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* @param {String[]} - Array of users
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* @returns {Boolean} - True if admin privileges
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*/
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export const isUserAdmin = (users) => {
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if (!users || users.length === 0) return true; // Authentication not setup
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if (!isLoggedIn(users)) return false; // Auth setup, but not signed in as a valid user
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const currentUser = localStorage[localStorageKeys.USERNAME];
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let isAdmin = false;
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users.forEach((user) => {
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if (user.user === currentUser) {
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if (user.type === 'admin') isAdmin = true;
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}
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});
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return isAdmin;
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};
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