"use strict"; const plugins = require("./smartacme.plugins"); const https = require("https"); let jwa = require('jwa'); const url = require("url"); const q = require("q"); /** * json_to_utf8base64url * @private * @description convert JSON to base64-url encoded string using UTF-8 encoding * @param {Object} obj * @return {string} * @throws Exception if object cannot be stringified or contains cycle */ let json_to_utf8base64url = (obj) => { return plugins.smartstring.base64.encodeUri(JSON.stringify(obj)); }; /** * @class JWebClient * @constructor * @description Implementation of HTTPS-based JSON-Web-Client */ class JWebClient { constructor() { /** * User account key pair */ this.keyPair = {}; /** * Cached nonce returned with last request */ this.lastNonce = null; this.verbose = false; } /** * createJWT * @description create JSON-Web-Token signed object * @param {string|undefined} nonce * @param {Object|string|number|boolean} payload * @param {string} alg * @param {Object|string} key * @param {Object} jwk * @return {string} */ createJWT(nonce, payload, alg, key, jwk) { /*jshint -W069 */ // prepare key if (key instanceof Object) { key = new Buffer(plugins.smartstring.base64.decode(key['k'])); } // prepare header let header = { typ: 'JWT', alg: alg, jwk: jwk, nonce: null }; if (nonce !== void 0) { header.nonce = nonce; } // concatenate header and payload let input = [ json_to_utf8base64url(header), json_to_utf8base64url(payload) ].join('.'); // sign input let hmac = jwa(alg); let sig = hmac.sign(input, key); // concatenate input and signature let output = [ input, sig ].join('.'); // output return output; } /** * request * @description make GET or POST request over HTTPS and use JOSE as payload type * @param {string} query * @param {string} payload * @param {function} callback * @param {function} errorCallback */ request(query, payload = null) { let done = q.defer(); // prepare options let uri = url.parse(query); let options = { hostname: uri.hostname, port: parseInt(uri.port, 10), path: uri.path, method: null, headers: {} }; if (!payload === null) { options.method = 'POST'; options.headers = { 'Content-Type': 'application/jose', 'Content-Length': payload.length }; } else { options.method = 'GET'; } // prepare request let req = https.request(options, (res) => { // receive data let data = []; res.on('data', (block) => { if (block instanceof Buffer) { data.push(block); } }); res.on('end', () => { let buf = Buffer.concat(data); let isJSON = ((res instanceof Object) && (res['headers'] instanceof Object) && (typeof res.headers['content-type'] === 'string') && (res.headers['content-type'].indexOf('json') > -1)); if (isJSON && buf.length > 0) { try { // convert to JSON let json = JSON.parse(buf.toString('utf8')); done.resolve({ json: json, res: res }); } catch (e) { // error (if empty or invalid JSON) done.reject(e); } } }); }).on('error', (e) => { console.error('Error occured', e); // error done.reject(e); }); // write POST body if payload was specified if (!payload === null) { req.write(payload); } // make request req.end(); return done.promise; } /** * get * @description make GET request * @param {string} uri * @param {function} callback * @param {function} errorCallback */ get(uri) { let done = q.defer(); this.request(uri) .then((reqResArg) => { this.evaluateStatus(uri, null, reqResArg.ans, reqResArg.res); // save replay nonce for later requests if ((reqResArg.res instanceof Object) && (reqResArg.res['headers'] instanceof Object)) { this.lastNonce = reqResArg.res.headers['replay-nonce']; } done.resolve(reqResArg); }); return done.promise; } /** * make POST request * @param {string} uri * @param {Object|string|number|boolean} payload * @param {function} callback * @param {function} errorCallback */ post(uri, payload) { let done = q.defer(); let jwt = this.createJWT(this.lastNonce, payload, 'RS256', this.keyPair['private_pem'], this.keyPair['public_jwk']); this.request(uri, jwt) .then((reqResArg) => { this.evaluateStatus(uri, payload, reqResArg.ans, reqResArg.res); // save replay nonce for later requests if ((reqResArg.res instanceof Object) && (reqResArg.res['headers'] instanceof Object)) { this.lastNonce = reqResArg.res.headers['replay-nonce']; } done.resolve(reqResArg); }); return done.promise; } /** * checks if status is expected and log errors * @param {string} uri * @param {Object|string|number|boolean} payload * @param {Object|string} ans * @param {Object} res */ evaluateStatus(uri, payload, ans, res) { if (this.verbose) { if ((payload instanceof Object) || (typeof payload === 'string') || (typeof payload === 'number') || (typeof payload === 'boolean')) { console.error('Send :', payload); // what has been sent } } let uri_parsed = url.parse(uri); if (res['statusCode'] >= 100 && res['statusCode'] < 400) { console.error('HTTP :', res['statusCode'], uri_parsed.path); // response code if successful } if (res['statusCode'] >= 400 && res['statusCode'] < 500) { console.error('HTTP :', res['statusCode'], uri_parsed.path); // response code if error if (ans instanceof Object) { if (typeof ans['detail'] === 'string') { console.error('Message:', ans.detail.split(' :: ').pop()); // error message if any } } } if (this.verbose) { console.error('Receive:', res['headers']); // received headers console.error('Receive:', ans); // received data } } } exports.JWebClient = JWebClient; //# 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