368 lines
12 KiB
JavaScript
368 lines
12 KiB
JavaScript
'use strict';
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module.exports.create = function (deps, config, netHandler) {
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var path = require('path');
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var tls = require('tls');
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var parseSni = require('sni');
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var greenlock = require('greenlock');
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var localhostCerts = require('localhost.daplie.me-certificates');
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var domainMatches = require('../domain-utils').match;
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function extractSocketProp(socket, propName) {
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// remoteAddress, remotePort... ugh... https://github.com/nodejs/node/issues/8854
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var altName = '_' + propName;
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var value = socket[propName] || socket[altName];
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try {
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value = value || socket._handle._parent.owner.stream[propName];
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value = value || socket._handle._parent.owner.stream[altName];
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} catch (e) {}
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try {
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value = value || socket._handle._parentWrap[propName];
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value = value || socket._handle._parentWrap[altName];
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value = value || socket._handle._parentWrap._handle.owner.stream[propName];
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value = value || socket._handle._parentWrap._handle.owner.stream[altName];
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} catch (e) {}
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return value || '';
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}
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function nameMatchesDomains(name, domains) {
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return domains.some(function (pattern) {
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return domainMatches(pattern, name);
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});
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}
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var addressNames = [
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'remoteAddress'
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, 'remotePort'
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, 'remoteFamily'
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, 'localAddress'
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, 'localPort'
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];
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function wrapSocket(socket, opts, cb) {
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var reader = require('socket-pair').create(function (err, writer) {
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if (typeof cb === 'function') {
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process.nextTick(cb);
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}
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if (err) {
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reader.emit('error', err);
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return;
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}
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process.nextTick(function () {
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socket.unshift(opts.firstChunk);
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});
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socket.pipe(writer);
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writer.pipe(socket);
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socket.on('error', function (err) {
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console.log('wrapped TLS socket error', err);
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reader.emit('error', err);
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});
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writer.on('error', function (err) {
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console.error('socket-pair writer error', err);
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// If the writer had an error the reader probably did too, and I don't think we'll
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// get much out of emitting this on the original socket, so logging is enough.
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});
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socket.on('close', writer.destroy.bind(writer));
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writer.on('close', socket.destroy.bind(socket));
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});
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// We can't set these properties the normal way because there is a getter without a setter,
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// but we can use defineProperty. We reuse the descriptor even though we will be manipulating
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// it because we will only ever set the value and we set it every time.
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var descriptor = {enumerable: true, configurable: true, writable: true};
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addressNames.forEach(function (name) {
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descriptor.value = opts[name] || extractSocketProp(socket, name);
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Object.defineProperty(reader, name, descriptor);
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});
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return reader;
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}
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var le = greenlock.create({
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server: 'https://acme-v01.api.letsencrypt.org/directory'
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, challenges: {
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'http-01': require('le-challenge-fs').create({ debug: config.debug })
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, 'tls-sni-01': require('le-challenge-sni').create({ debug: config.debug })
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// TODO dns-01
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//, 'dns-01': require('le-challenge-ddns').create({ debug: config.debug })
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}
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, challengeType: 'http-01'
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, store: require('le-store-certbot').create({
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debug: config.debug
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, configDir: path.join(require('os').homedir(), 'acme', 'etc')
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, logDir: path.join(require('os').homedir(), 'acme', 'var', 'log')
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, workDir: path.join(require('os').homedir(), 'acme', 'var', 'lib')
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})
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, approveDomains: function (opts, certs, cb) {
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// This is where you check your database and associated
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// email addresses with domains and agreements and such
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// The domains being approved for the first time are listed in opts.domains
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// Certs being renewed are listed in certs.altnames
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if (certs) {
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// TODO make sure the same options are used for renewal as for registration?
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opts.domains = certs.altnames;
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cb(null, { options: opts, certs: certs });
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return;
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}
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function complete(optsOverride, domains) {
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if (!cb) {
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console.warn('tried to complete domain approval multiple times');
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return;
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}
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// // We can't request certificates for wildcard domains, so filter any of those
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// // out of this list and put the domain that triggered this in the list if needed.
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// domains = (domains || []).filter(function (dom) { return dom[0] !== '*'; });
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// if (domains.indexOf(opts.domain) < 0) {
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// domains.push(opts.domain);
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// }
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domains = [ opts.domain ];
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// TODO: allow user to specify options for challenges or storage.
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Object.assign(opts, optsOverride, { domains: domains, agreeTos: true });
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cb(null, { options: opts, certs: certs });
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cb = null;
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}
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var handled = false;
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if (Array.isArray(config.tls.domains)) {
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handled = config.tls.domains.some(function (dom) {
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if (!nameMatchesDomains(opts.domain, dom.names)) {
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return false;
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}
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return dom.modules.some(function (mod) {
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if (mod.name !== 'acme') {
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return false;
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}
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complete(mod, dom.names);
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return true;
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});
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});
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}
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if (handled) {
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return;
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}
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if (Array.isArray(config.tls.modules)) {
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handled = config.tls.modules.some(function (mod) {
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if (mod.name !== 'acme') {
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return false;
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}
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if (!nameMatchesDomains(opts.domain, mod.domains)) {
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return false;
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}
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complete(mod, mod.domains);
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return true;
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});
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}
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if (handled) {
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return;
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}
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var defAcmeConf;
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if (config.tls.acme) {
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defAcmeConf = config.tls.acme;
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} else {
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defAcmeConf = {
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email: config.tls.email
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, server: config.tls.acmeDirectoryUrl || le.server
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, challengeType: config.tls.challengeType || le.challengeType
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, approvedDomains: config.tls.servernames
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};
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}
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// Check config for domain name
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// TODO: if `approvedDomains` isn't defined check all other modules to see if they can
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// handle this domain (and what other domains it's grouped with).
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if (-1 !== (defAcmeConf.approvedDomains || []).indexOf(opts.domain)) {
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complete(defAcmeConf, defAcmeConf.approvedDomains);
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return;
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}
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cb(new Error('domain is not allowed'));
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}
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});
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le.tlsOptions = le.tlsOptions || le.httpsOptions;
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var secureContexts = {};
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var terminatorOpts = require('localhost.daplie.me-certificates').merge({});
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terminatorOpts.SNICallback = function (sni, cb) {
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sni = sni.toLowerCase();
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console.log("[tlsOptions.SNICallback] SNI: '" + sni + "'");
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var tlsOptions;
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// Static Certs
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if (/\.invalid$/.test(sni)) {
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sni = 'localhost.daplie.me';
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}
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if (/.*localhost.*\.daplie\.me/.test(sni)) {
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if (!secureContexts[sni]) {
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tlsOptions = localhostCerts.mergeTlsOptions(sni, {});
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if (tlsOptions) {
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secureContexts[sni] = tls.createSecureContext(tlsOptions);
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}
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}
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if (secureContexts[sni]) {
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console.log('Got static secure context:', sni, secureContexts[sni]);
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cb(null, secureContexts[sni]);
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return;
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}
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}
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le.tlsOptions.SNICallback(sni, cb);
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};
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var terminateServer = tls.createServer(terminatorOpts, function (socket) {
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console.log('(post-terminated) tls connection, addr:', extractSocketProp(socket, 'remoteAddress'));
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netHandler(socket, {
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servername: socket.servername
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, encrypted: true
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// remoteAddress... ugh... https://github.com/nodejs/node/issues/8854
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, remoteAddress: extractSocketProp(socket, 'remoteAddress')
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, remotePort: extractSocketProp(socket, 'remotePort')
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, remoteFamily: extractSocketProp(socket, 'remoteFamily')
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});
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});
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terminateServer.on('error', function (err) {
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console.log('[error] TLS termination server', err);
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});
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function proxy(socket, opts, mod) {
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var newConnOpts = require('../domain-utils').separatePort(mod.address || '');
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newConnOpts.port = newConnOpts.port || mod.port;
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newConnOpts.host = newConnOpts.host || mod.host || 'localhost';
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newConnOpts.servername = opts.servername;
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newConnOpts.data = opts.firstChunk;
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newConnOpts.remoteFamily = opts.family || extractSocketProp(socket, 'remoteFamily');
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newConnOpts.remoteAddress = opts.address || extractSocketProp(socket, 'remoteAddress');
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newConnOpts.remotePort = opts.port || extractSocketProp(socket, 'remotePort');
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deps.proxy(socket, newConnOpts, opts.firstChunk, function () {
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// This function is called in the event of a connection error and should decrypt
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// the socket so the proxy module can send a 502 HTTP response.
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var tlsOpts = localhostCerts.mergeTlsOptions('localhost.daplie.me', {isServer: true});
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if (opts.hyperPeek) {
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return new tls.TLSSocket(socket, tlsOpts);
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} else {
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return new tls.TLSSocket(wrapSocket(socket, opts), tlsOpts);
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}
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});
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return true;
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}
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function terminate(socket, opts) {
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console.log(
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'[tls-terminate]'
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, opts.localAddress || socket.localAddress +':'+ opts.localPort || socket.localPort
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, 'servername=' + opts.servername
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, opts.remoteAddress || socket.remoteAddress
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);
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var wrapped;
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// We can't emit the connection to the TLS server until we know the connection is fully
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// opened, otherwise it might hang open when the decrypted side is destroyed.
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// https://github.com/nodejs/node/issues/14605
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function emitSock() {
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terminateServer.emit('connection', wrapped);
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}
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if (opts.hyperPeek) {
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// This connection was peeked at using a method that doesn't interferre with the TLS
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// server's ability to handle it properly. Currently the only way this happens is
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// with tunnel connections where we have the first chunk of data before creating the
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// new connection (thus removing need to get data off the new connection).
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wrapped = socket;
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process.nextTick(emitSock);
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}
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else {
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// The hyperPeek flag wasn't set, so we had to read data off of this connection, which
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// means we can no longer use it directly in the TLS server.
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// See https://github.com/nodejs/node/issues/8752 (node's internal networking layer == 💩 sometimes)
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wrapped = wrapSocket(socket, opts, emitSock);
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}
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}
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function handleConn(socket, opts) {
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opts.servername = (parseSni(opts.firstChunk)||'').toLowerCase() || 'localhost.invalid';
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// needs to wind up in one of 2 states:
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// 1. SNI-based Proxy / Tunnel (we don't even need to put it through the tlsSocket)
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// 2. Terminated (goes on to a particular module or route, including the admin interface)
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// 3. Closed (we don't recognize the SNI servername as something we actually want to handle)
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// We always want to terminate is the SNI matches the challenge pattern, unless a client
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// on the south side has temporarily claimed a particular challenge. For the time being
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// we don't have a way for the south-side to communicate with us, so that part isn't done.
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if (domainMatches('*.acme-challenge.invalid', opts.servername)) {
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terminate(socket, opts);
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return;
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}
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if (deps.tunnelServer.isClientDomain(opts.servername)) {
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deps.tunnelServer.handleClientConn(socket);
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if (!opts.hyperPeek) {
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process.nextTick(function () {
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socket.unshift(opts.firstChunk);
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});
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}
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return;
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}
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function checkModule(mod) {
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if (mod.name === 'proxy') {
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return proxy(socket, opts, mod);
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}
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if (mod.name !== 'acme') {
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console.error('saw unknown TLS module', mod);
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}
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}
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var handled = (config.tls.domains || []).some(function (dom) {
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if (!nameMatchesDomains(opts.servername, dom.names)) {
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return false;
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}
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return dom.modules.some(checkModule);
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});
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if (handled) {
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return;
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}
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handled = (config.tls.modules || []).some(function (mod) {
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if (!nameMatchesDomains(opts.servername, mod.domains)) {
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return false;
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}
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return checkModule(mod);
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});
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if (handled) {
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return;
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}
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// TODO: figure out all of the domains that the other modules intend to handle, and only
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// terminate those ones, closing connections for all others.
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terminate(socket, opts);
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}
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return {
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emit: function (type, socket) {
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if (type === 'connection') {
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handleConn(socket, socket.__opts);
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}
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}
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, middleware: le.middleware()
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};
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};
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