245 lines
8.2 KiB
JavaScript
245 lines
8.2 KiB
JavaScript
'use strict';
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// TODO handle www and no-www together somehow?
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var PromiseA = require('bluebird');
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var leCore = require('letiny-core');
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var merge = require('./lib/common').merge;
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var tplHostname = require('./lib/common').tplHostname;
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var LE = module.exports;
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LE.productionServerUrl = leCore.productionServerUrl;
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LE.stagingServerUrl = leCore.stagingServerUrl;
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LE.configDir = leCore.configDir;
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LE.logsDir = leCore.logsDir;
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LE.workDir = leCore.workDir;
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LE.acmeChallengPrefix = leCore.acmeChallengPrefix;
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LE.knownEndpoints = leCore.knownEndpoints;
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// backwards compat
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LE.stagingServer = leCore.stagingServerUrl;
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LE.liveServer = leCore.productionServerUrl;
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LE.knownUrls = leCore.knownEndpoints;
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LE.merge = require('./lib/common').merge;
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LE.tplConfigDir = require('./lib/common').tplConfigDir;
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// backend, defaults, handlers
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LE.create = function (defaults, handlers, backend) {
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var d, b, h;
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// backwards compat for <= v1.0.2
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if (defaults.registerAsync || defaults.create) {
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b = defaults; d = handlers; h = backend;
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defaults = d; handlers = h; backend = b;
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}
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if (!backend) { backend = require('./lib/core'); }
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if (!handlers) { handlers = {}; }
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if (!handlers.lifetime) { handlers.lifetime = 90 * 24 * 60 * 60 * 1000; }
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if (!handlers.renewWithin) { handlers.renewWithin = 3 * 24 * 60 * 60 * 1000; }
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if (!handlers.memorizeFor) { handlers.memorizeFor = 1 * 24 * 60 * 60 * 1000; }
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if (!handlers.sniRegisterCallback) {
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handlers.sniRegisterCallback = function (args, cache, cb) {
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// TODO when we have ECDSA, just do this automatically
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cb(null, null);
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};
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}
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if (!handlers.getChallenge) {
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if (!defaults.manual && !defaults.webrootPath) {
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// GET /.well-known/acme-challenge/{{challengeKey}} should return {{tokenValue}}
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throw new Error("handlers.getChallenge or defaults.webrootPath must be set");
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}
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handlers.getChallenge = function (hostname, key, done) {
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// TODO associate by hostname?
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// hmm... I don't think there's a direct way to associate this with
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// the request it came from... it's kinda stateless in that way
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// but realistically there only needs to be one handler and one
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// "directory" for this. It's not that big of a deal.
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var defaultos = LE.merge(defaults, {});
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var getChallenge = require('./lib/default-handlers').getChallenge;
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var copy = merge(defaults, { domains: [hostname] });
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tplHostname(hostname, copy);
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defaultos.domains = [hostname];
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if (3 === getChallenge.length) {
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getChallenge(defaultos, key, done);
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}
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else if (4 === getChallenge.length) {
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getChallenge(defaultos, hostname, key, done);
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}
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else {
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done(new Error("handlers.getChallenge [1] receives the wrong number of arguments"));
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}
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};
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}
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if (!handlers.setChallenge) {
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if (!defaults.webrootPath) {
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// GET /.well-known/acme-challenge/{{challengeKey}} should return {{tokenValue}}
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throw new Error("handlers.setChallenge or defaults.webrootPath must be set");
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}
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handlers.setChallenge = require('./lib/default-handlers').setChallenge;
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}
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if (!handlers.removeChallenge) {
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if (!defaults.webrootPath) {
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// GET /.well-known/acme-challenge/{{challengeKey}} should return {{tokenValue}}
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throw new Error("handlers.removeChallenge or defaults.webrootPath must be set");
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}
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handlers.removeChallenge = require('./lib/default-handlers').removeChallenge;
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}
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if (!handlers.agreeToTerms) {
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if (defaults.agreeTos) {
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console.warn("[WARN] Agreeing to terms by default is risky business...");
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}
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handlers.agreeToTerms = require('./lib/default-handlers').agreeToTerms;
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}
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if ('function' === typeof backend.create) {
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backend = backend.create(defaults, handlers);
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}
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else {
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// ignore
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// this backend was created the v1.0.0 way
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}
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// replaces strings of workDir, certPath, etc
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// if they have :config/etc/live or :conf/etc/archive
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// to instead have the path of the configDir
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LE.tplConfigDir(defaults.configDir, defaults);
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backend = PromiseA.promisifyAll(backend);
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var utils = require('./lib/common');
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//var attempts = {}; // should exist in master process only
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var le;
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// TODO check certs on initial load
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// TODO expect that certs expire every 90 days
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// TODO check certs with setInterval?
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//options.cacheContextsFor = options.cacheContextsFor || (1 * 60 * 60 * 1000);
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le = {
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backend: backend
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, validate: function (hostnames, cb) {
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// TODO check dns, etc
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if ((!hostnames.length && hostnames.every(le.isValidDomain))) {
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cb(new Error("node-letsencrypt: invalid hostnames: " + hostnames.join(',')));
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return;
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}
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//
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// IMPORTANT
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//
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// Before attempting a dynamic registration you need to validate that
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//
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// * these are hostnames that you expected to exist on the system
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// * their A records currently point to this ip
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// * this system's ip hasn't changed
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//
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// If you do not check these things, then someone could attack you
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// and cause you, in return, to have your ip be rate-limit blocked
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//
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console.warn("\n[TODO]: node-letsencrypt: `validate(hostnames, cb)` needs to be implemented");
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console.warn("(it'll work fine without it, but for security - and convenience - it should be implemented\n");
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cb(null, true);
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}
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, _registerHelper: function (args, cb) {
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var copy = LE.merge(defaults, args);
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var err;
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if (!utils.isValidDomain(args.domains[0])) {
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err = new Error("invalid domain");
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err.code = "INVALID_DOMAIN";
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cb(err);
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return;
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}
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return le.validate(args.domains, function (err) {
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if (err) {
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cb(err);
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return;
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}
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//console.log("[NLE]: begin registration");
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return backend.registerAsync(copy).then(function (pems) {
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//console.log("[NLE]: end registration");
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cb(null, pems);
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//return le.fetch(args, cb);
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}, cb);
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});
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}
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, _fetchHelper: function (args, cb) {
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return backend.fetchAsync(args).then(function (certInfo) {
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if (args.debug) {
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console.log('[LE] raw fetch certs', certInfo && Object.keys(certInfo));
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}
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if (!certInfo) { cb(null, null); return; }
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// key, cert, issuedAt, lifetime, expiresAt
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if (!certInfo.expiresAt) {
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certInfo.expiresAt = certInfo.issuedAt + (certInfo.lifetime || handlers.lifetime);
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}
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if (!certInfo.lifetime) {
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certInfo.lifetime = (certInfo.lifetime || handlers.lifetime);
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}
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// a pretty good hard buffer
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certInfo.expiresAt -= (1 * 24 * 60 * 60 * 100);
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cb(null, certInfo);
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}, cb);
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}
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, fetch: function (args, cb) {
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le._fetchHelper(args, cb);
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}
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, renew: function (args, cb) {
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args.duplicate = false;
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le.register(args, cb);
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}
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, register: function (args, cb) {
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if (!Array.isArray(args.domains)) {
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cb(new Error('args.domains should be an array of domains'));
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return;
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}
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// this may be run in a cluster environment
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// in that case it should NOT check the cache
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// but ensure that it has the most fresh copy
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// before attempting a renew
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le._fetchHelper(args, function (err, hit) {
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var now = Date.now();
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if (err) {
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// had a bad day
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cb(err);
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return;
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}
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else if (hit) {
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if (!args.duplicate && (now - hit.issuedAt) < ((hit.lifetime || handlers.lifetime) * 0.65)) {
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console.warn("\ntried to renew a certificate with over 1/3 of its lifetime left, ignoring");
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console.warn("(use --duplicate or opts.duplicate to override\n");
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cb(null, hit);
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return;
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}
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}
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return le._registerHelper(args, function (err/*, pems*/) {
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if (err) {
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cb(err);
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return;
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}
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// Sanity Check
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le._fetchHelper(args, function (err, pems) {
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if (pems) {
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cb(null, pems);
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return;
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}
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// still couldn't read the certs after success... that's weird
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cb(err, null);
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});
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}, cb);
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});
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}
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};
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return le;
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};
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