chrome-pwgen/js/popup.js

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1.7 KiB
JavaScript
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2017-03-12 20:05:02 -06:00
var letters = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
var numbers = "0123456789";
var symbols = "!@#$^&*()~+-=_";
function randint(range) {
let a = new Uint32Array(1);
window.crypto.getRandomValues(a);
return (a % range);
}
function choice(items) {
let n = randint(items.length);
return items[n];
}
function shuffle(items) {
for (let i = 0; i < items.length; i += 1) {
let p = randint(items.length);
let c = items[p];
items[p] = items[i];
items[i] = c;
}
}
function regen() {
let num = document.getElementById('num').checked;
let sym = document.getElementById('sym').checked;
let len = document.getElementById('len').value;
let pw = document.getElementById('password');
let chars = [];
let nnums = num?(randint(len/3)+1):0;
let nsyms = sym?(randint(len/5)+1):0;
for (let i = 0; i < nnums; i += 1) {
chars.push(choice(numbers));
}
for (let i = 0; i < nsyms; i += 1) {
chars.push(choice(symbols));
}
for (let i = chars.length; i < len; i += 1) {
chars.push(choice(letters));
}
shuffle(chars);
password.value = chars.join("");
// Put it on the clipboard
let range = document.createRange();
range.selectNode(pw);
window.getSelection().addRange(range);
document.execCommand('copy');
window.getSelection().removeAllRanges();
document.getElementById('lentxt').textContent = len;
}
function setup() {
document.getElementById('regen').addEventListener('click', regen);
document.getElementById('num').addEventListener('change', regen);
document.getElementById('sym').addEventListener('change', regen);
document.getElementById('len').addEventListener('input', regen);
regen();
}
document.addEventListener('DOMContentLoaded', setup);