onceler

A One-Time-Password library for node.js

TOTP

var TOTP = require('onceler').TOTP;

// create a TOTP object for a given base-32 encoded secret.
var totp = new TOTP('IFAUCQKCIJBEE===');

// get the password at a specified time index
console.log(totp.at(650269));

// get the password for the current time
console.log(totp.now());

// verify a user supplied password
if(totp.verify(1234567)) {
    console.log('access granted!');
} else {
    console.log('access denied!');
}

OTP digit size and time interval can be specified as such:

// 60 second interval
var totp = new TOTP('IFAUCQKCIJBEE===', null, 60);

// 12 digit size
var totp = new TOTP('IFAUCQKCIJBEE===', 12);

// both
var totp = new TOTP('IFAUCQKCIJBEE===', 12, 60);

HOTP

HOTP is also supported.

var HOTP = require('onceler').HOTP;

// create an HOTP object for a given base-32 encoded secret.
var hotp = new HOTP('IFAUCQKCIJBEE===');

// hotp.verify(password, count)
if(hotp.verify(581561, 0)) {
    console.log('access granted!');
} else {
    console.log('access denied!');
}

if(hotp.verify(224556, 1)) {
    console.log('access granted!');
} else {
    console.log('access denied!');
}

LICENSE

Copyright (c) 2011, Chris Umbel

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.