source: trip-planner-front/node_modules/cookie-signature/index.js@ 59329aa

Last change on this file since 59329aa was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

  • Property mode set to 100644
File size: 1.2 KB
Line 
1/**
2 * Module dependencies.
3 */
4
5var crypto = require('crypto');
6
7/**
8 * Sign the given `val` with `secret`.
9 *
10 * @param {String} val
11 * @param {String} secret
12 * @return {String}
13 * @api private
14 */
15
16exports.sign = function(val, secret){
17 if ('string' != typeof val) throw new TypeError("Cookie value must be provided as a string.");
18 if ('string' != typeof secret) throw new TypeError("Secret string must be provided.");
19 return val + '.' + crypto
20 .createHmac('sha256', secret)
21 .update(val)
22 .digest('base64')
23 .replace(/\=+$/, '');
24};
25
26/**
27 * Unsign and decode the given `val` with `secret`,
28 * returning `false` if the signature is invalid.
29 *
30 * @param {String} val
31 * @param {String} secret
32 * @return {String|Boolean}
33 * @api private
34 */
35
36exports.unsign = function(val, secret){
37 if ('string' != typeof val) throw new TypeError("Signed cookie string must be provided.");
38 if ('string' != typeof secret) throw new TypeError("Secret string must be provided.");
39 var str = val.slice(0, val.lastIndexOf('.'))
40 , mac = exports.sign(str, secret);
41
42 return sha1(mac) == sha1(val) ? str : false;
43};
44
45/**
46 * Private
47 */
48
49function sha1(str){
50 return crypto.createHash('sha1').update(str).digest('hex');
51}
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