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index.js
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index.js
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/*!
* paranoik
* Copyright(c) 2019 Guillermo Quinteros
* MIT Licensed
*/
'use strict';
/**
* Module exports.
* @public
*/
module.exports = paranoik;
/**
* Module dependencies.
* @private
*/
const md5 = require('js-md5');
/**
* Create a Signature middleware.
*
* @public
* @param {Object} [options]
* @return {Function} middleware
*/
function paranoik (options) {
const opts = options || {};
return function verify (req, res, next) {
if (req.method === 'OPTIONS') {
next();
}
const url = req.protocol + '://' + req.get('host') + req.originalUrl;
const body = Object.is(req.body, {}) ? req.body : 'empty';
const data = [ url, req.method, body, req.get('User-Agent'), opts.secret ];
if (req.headers.signature !== md5(JSON.stringify(data))) {
res.status(403).end();
}
next();
};
}