index.js
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/*
* Copyright 2016, Joyent, Inc. All rights reserved.
* Author: Alex Wilson <alex.wilson@joyent.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
module.exports = {
getPass: getPass
};
const mod_tty = require('tty');
const mod_fs = require('fs');
const mod_assert = require('assert-plus');
var BACKSPACE = String.fromCharCode(127);
var CTRLC = '\u0003';
var CTRLD = '\u0004';
function getPass(opts, cb) {
if (typeof (opts) === 'function' && cb === undefined) {
cb = opts;
opts = {};
}
mod_assert.object(opts, 'options');
mod_assert.func(cb, 'callback');
mod_assert.optionalString(opts.prompt, 'options.prompt');
if (opts.prompt === undefined)
opts.prompt = 'Password';
openTTY(function (err, rfd, wfd, rtty, wtty) {
if (err) {
cb(err);
return;
}
wtty.write(opts.prompt + ':');
rtty.resume();
rtty.setRawMode(true);
rtty.resume();
rtty.setEncoding('utf8');
var pw = '';
rtty.on('data', onData);
function onData(data) {
var str = data.toString('utf8');
for (var i = 0; i < str.length; ++i) {
var ch = str[i];
switch (ch) {
case '\r':
case '\n':
case CTRLD:
cleanup();
cb(null, pw);
return;
case CTRLC:
cleanup();
cb(new Error('Aborted'));
return;
case BACKSPACE:
pw = pw.slice(0, pw.length - 1);
break;
default:
pw += ch;
break;
}
}
}
function cleanup() {
wtty.write('\r\n');
rtty.setRawMode(false);
rtty.pause();
rtty.removeListener('data', onData);
if (wfd !== undefined && wfd !== rfd) {
wtty.end();
mod_fs.closeSync(wfd);
}
if (rfd !== undefined) {
rtty.end();
mod_fs.closeSync(rfd);
}
}
});
}
function openTTY(cb) {
mod_fs.open('/dev/tty', 'r+', function (err, rttyfd) {
if ((err && (err.code === 'ENOENT' || err.code === 'EACCES')) ||
(process.version.match(/^v0[.][0-8][.]/))) {
cb(null, undefined, undefined, process.stdin,
process.stdout);
return;
}
var rtty = new mod_tty.ReadStream(rttyfd);
mod_fs.open('/dev/tty', 'w+', function (err3, wttyfd) {
var wtty = new mod_tty.WriteStream(wttyfd);
if (err3) {
cb(err3);
return;
}
cb(null, rttyfd, wttyfd, rtty, wtty);
});
});
}