88 line
2.4 KiB
JavaScript
88 line
2.4 KiB
JavaScript
(function (exports) {
|
|
'use strict';
|
|
|
|
var Authenticator = exports.Authenticator || exports;
|
|
var Unibabel = window.Unibabel; // || require('unibabel');
|
|
var totp = window.totp; // || require('notp').totp;
|
|
|
|
if (!window.crypto) {
|
|
document.addEventListener('mousemove', function (event) {
|
|
var ev = event || window.event;
|
|
|
|
window.forge.random.collectInt(ev.pageX, 16);
|
|
window.forge.random.collectInt(ev.pageY, 16);
|
|
});
|
|
}
|
|
|
|
// Generate a key
|
|
function generateOtpKey() {
|
|
// 20 cryptographically random binary bytes (160-bit key)
|
|
if (window.crypto) {
|
|
var key = window.crypto.getRandomValues(new Uint8Array(20));
|
|
|
|
return Promise.resolve(key);
|
|
} else {
|
|
// Promises are supported even in Microsoft Edge
|
|
// only old IE and old android need shims
|
|
return new Promise(function (resolve, reject) {
|
|
window.forge.random.getBytes(20, function (err, bytes) {
|
|
if (err) {
|
|
reject(err);
|
|
return;
|
|
}
|
|
|
|
resolve(Unibabel.binaryStringToBuffer(bytes));
|
|
});
|
|
});
|
|
}
|
|
}
|
|
|
|
// Text-encode the key as base32 (in the style of Google Authenticator - same as Facebook, Microsoft, etc)
|
|
function encodeGoogleAuthKey(bin) {
|
|
// 32 ascii characters without trailing '='s
|
|
var base32 = (Unibabel||window).bufferToBase32(bin).replace(/=/g, '');
|
|
|
|
// lowercase with a space every 4 characters
|
|
var key = base32.toLowerCase().replace(/(\w{4})/g, "$1 ").trim();
|
|
|
|
return key;
|
|
}
|
|
|
|
function generateGoogleAuthKey() {
|
|
return generateOtpKey().then(encodeGoogleAuthKey);
|
|
}
|
|
|
|
// Binary-decode the key from base32 (Google Authenticator, FB, M$, etc)
|
|
function decodeGoogleAuthKey(key) {
|
|
// decode base32 google auth key to binary
|
|
var unformatted = key.replace(/\W+/g, '').toUpperCase();
|
|
var bin = (Unibabel||window).base32ToBuffer(unformatted);
|
|
|
|
return bin;
|
|
}
|
|
|
|
// Generate a Google Auth Token
|
|
function generateGoogleAuthToken(key) {
|
|
var bin = decodeGoogleAuthKey(key);
|
|
|
|
return totp.gen(bin);
|
|
}
|
|
|
|
// Verify a Google Auth Token
|
|
function verifyGoogleAuthToken(key, token) {
|
|
var bin = decodeGoogleAuthKey(key);
|
|
|
|
token = token.replace(/\W+/g, '');
|
|
|
|
// window is +/- 1 period of 30 seconds
|
|
return totp.verify(token, bin, { window: 1, time: 30 });
|
|
}
|
|
|
|
Authenticator.generateKey = generateGoogleAuthKey;
|
|
Authenticator.generateToken = generateGoogleAuthToken;
|
|
Authenticator.verifyToken = verifyGoogleAuthToken;
|
|
|
|
}(
|
|
'undefined' !== typeof window ? (window.Authenticator = {}) : module.exports
|
|
));
|