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Update app.js 

Define some constants.
Add RFC comments.
master
Andrew Gregory 2022-03-23 22:24:14 +08:00 committed by GitHub
parent b3cc125a3f
commit 00ad2a1278
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1 changed files with 10 additions and 8 deletions
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18
apps/authentiwatch/app.js
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@ -2,6 +2,8 @@ const COUNTER_TRIANGLE_SIZE = 10;
const TOKEN_EXTRA_HEIGHT = 16;
var TOKEN_DIGITS_HEIGHT = 30;
var TOKEN_HEIGHT = TOKEN_DIGITS_HEIGHT + TOKEN_EXTRA_HEIGHT;
const PROGRESSBAR_HEIGHT = 3;
const IDLE_REPEATS = 1; // when idle, the number of extra timed periods to show before hiding
const SETTINGS = "authentiwatch.json";
// Hash functions
const crypto = require("crypto");
@ -21,7 +23,7 @@ if (settings.data ) tokens = settings.data ; /* v0.02 settings */
if (settings.tokens) tokens = settings.tokens; /* v0.03+ settings */
function b32decode(seedstr) {
// RFC4648
// RFC4648 Base16/32/64 Data Encodings
let buf = 0, bitcount = 0, retstr = "";
for (let c of seedstr.toUpperCase()) {
if (c == '0') c = 'O';
@ -48,7 +50,7 @@ function b32decode(seedstr) {
function hmac(key, message, algo) {
let a = algos[algo.toUpperCase()];
// RFC2104
// RFC2104 HMAC
if (key.length > a.blksz) {
key = a.sha(key);
}
@ -62,7 +64,7 @@ function hmac(key, message, algo) {
istr.set(message, a.blksz);
ostr.set(a.sha(istr), a.blksz);
let ret = a.sha(ostr);
// RFC4226 dynamic truncation
// RFC4226 HOTP (dynamic truncation)
let v = new DataView(ret, ret[ret.length - 1] & 0x0F, 4);
return v.getUint32(0) & 0x7FFFFFFF;
}
@ -187,7 +189,7 @@ function drawProgressBar() {
let y2 = y1 + TOKEN_HEIGHT - 1;
if (y2 >= AR.y && y1 <= AR.y2) {
// token visible
y1 = y2 - 3;
y1 = y2 - PROGRESSBAR_HEIGHT;
if (y1 <= AR.y2)
{
// progress bar visible
@ -278,7 +280,7 @@ function changeId(id) {
}
function onDrag(e) {
state.cnt = 1;
state.cnt = IDLE_REPEATS;
if (e.b != 0 && e.dy != 0) {
let y = E.clip(state.listy - E.clip(e.dy, -AR.h, AR.h), 0, Math.max(0, tokens.length * TOKEN_HEIGHT - AR.h));
if (state.listy != y) {
@ -312,7 +314,7 @@ function onDrag(e) {
}
function onTouch(zone, e) {
state.cnt = 1;
state.cnt = IDLE_REPEATS;
if (e) {
let id = Math.floor((state.listy + e.y - AR.y) / TOKEN_HEIGHT);
if (id == state.id || tokens.length == 0 || id >= tokens.length) {
@ -340,7 +342,7 @@ function onTouch(zone, e) {
}
function onSwipe(e) {
state.cnt = 1;
state.cnt = IDLE_REPEATS;
switch (e) {
case 1:
exitApp();
@ -358,7 +360,7 @@ function onSwipe(e) {
}
function bangleBtn(e) {
state.cnt = 1;
state.cnt = IDLE_REPEATS;
if (tokens.length > 0) {
let id = E.clip(state.id + e, 0, tokens.length - 1);
onDrag({b:1, dy:state.listy - E.clip(id * TOKEN_HEIGHT - half(AR.h - TOKEN_HEIGHT), 0, Math.max(0, tokens.length * TOKEN_HEIGHT - AR.h))});