dnschain

### dnschain http://dnschain.org Copyright (c) 2014 okTurtles Foundation This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/. ### ### This file contains the logic to handle connections on port 443 These connections can be naked HTTPS or wrapped inside of TLS ### ### NOTE: There can be any number of EncryptedServers. A good example of that is when running the tests. The TLSServers are shared between EncryptedServers. __________________________ ________________________ 443 traffic | | *--->| TLSServer | ______________ ----------->| EncryptedServer |--* | (Dumb decrypter) |---->| HTTPServer |----> Multiple destinations |(Categorization/Routing)| * | (One of many) | ______________ __________________________ * | (Unique destination) | * _______________________| * _____________ Soon *-->| TLSServer |----------> Unblock (Vastly simplified) _____________ ### module.exports = (dnschain) -> # expose these into our namespace for k of dnschain.globals eval "var #{k} = dnschain.globals.#{k};" libHTTPS = new ((require "./httpsUtils")(dnschain)) # TODO: httpsUtils doesn't need to be a class pem = (require './pem')(dnschain) httpSettings = gConf.get "http" unblockSettings = gConf.get "unblock" tlsLog = gNewLogger "TLSServer" httpsVars = tls: Promise.resolve() keyMaterial = _(httpSettings).pick(['tlsKey', 'tlsCert']).transform((o, v, k)-> o[k] = { key:k, path:v, exists: fs.existsSync(v) } ).value() # Auto-generate public/private key pair if they don't exist if _.some(keyMaterial, exists:false) missing = _.find(keyMaterial, exists:false) tlsLog.warn "File for http:#{missing.key} does not exist: #{missing.path}".bold.red tlsLog.warn "Vist this link for information on how to generate this file:".bold tlsLog.warn "https://github.com/okTurtles/dnschain/blob/master/docs/How-do-I-run-my-own.md#getting-started".bold # In the case where one file exists but the other does not # we do not auto-generate them for the user (so as to not overwrite anything) if exists = _.find(keyMaterial, exists:true) tlsLog.error "\nhttp:#{exists.key} exists at:\n\t".bold.yellow, exists.path.bold, "\nbut http:#{missing.key} does not exist at:\n\t".bold.red, missing.path.bold gErr "Missing file for http:#{missing.key}" tlsLog.warn "Auto-generating private key and certificate for you...".bold.yellow {tlsKey, tlsCert} = gConf.chains.dnschain.stores.defaults.get('http') unless httpSettings.tlsKey is tlsKey and httpSettings.tlsCert is tlsCert msg = "Can't autogen keys for you because you've customized their paths" if process.env.TEST_DNSCHAIN tlsLog.warn "Test detected. Not throwing error:".bold, msg.bold.yellow else gErr msg [tlsKey, tlsCert] = [httpSettings.tlsKey, httpSettings.tlsCert] httpsVars.tls = pem.genKeyCertPair(tlsKey, tlsCert).then -> tlsLog.info "Successfully autogenerated", {key:tlsKey, cert:tlsCert} # Fetch the public key fingerprint of the cert we're using and log to console httpsVars.tls = httpsVars.tls.then -> httpsVars.tlsOptions = key: fs.readFileSync httpSettings.tlsKey cert: fs.readFileSync httpSettings.tlsCert pem.certFingerprint(httpSettings.tlsCert).then (f) -> httpsVars.fingerprint = f tlsLog.info "Your certificate fingerprint is:", f.bold class EncryptedServer constructor: (@dnschain) -> @log = gNewLogger "HTTPS" @log.debug gLineInfo "Loading HTTPS..." @rateLimiting = gConf.get 'rateLimiting:https' @server = net.createServer (c) => key = "https-#{c.remoteAddress}" limiter = gThrottle key, => new Bottleneck @rateLimiting.maxConcurrent, @rateLimiting.minTime, @rateLimiting.highWater, @rateLimiting.strategy limiter.submit (@callback.bind @), c, null @server.on "error", (err) -> gErr err @server.on "close", => @log.info "HTTPS server received close event." gFillWithRunningChecks @ start: -> @startCheck (cb) => listen = => @server.listen httpSettings.tlsPort, httpSettings.host, => cb null, httpSettings if httpsVars.tls.then httpsVars.tls.then => httpsVars.tls = tls.createServer httpsVars.tlsOptions, (c) => libHTTPS.getStream "127.0.0.1", httpSettings.port, (err, stream) -> if err? tlsLog.error gLineInfo "Tunnel failed: Could not connect to HTTP Server" c?.destroy() return stream?.destroy() c.pipe(stream).pipe(c) httpsVars.tls.on "error", (err) -> tlsLog.error gLineInfo(), err gErr err.message httpsVars.tls.listen httpSettings.internalTLSPort, "127.0.0.1", -> tlsLog.info "Listening" listen() else listen() shutdown: -> @shutdownCheck (cb) => httpsVars.tls.close() # node docs don't indicate this takes a callback httpsVars.tls = Promise.resolve() # TODO: Simon, this hack is necessary # because without it test/https.coffee # breaks if it is not run first. # This happens because of the # `if httpsVars.tls.then` above # in `start:`. @server.close cb callback: (c, cb) -> libHTTPS.getClientHello c, (err, category, host, buf) => @log.debug err, category, host, buf?.length if err? @log.debug gLineInfo "TCP handling: "+err.message cb() return c?.destroy() # UNBLOCK: Check if needs to be hijacked isRouted = false # unblockSettings.enabled and unblockSettings.routeDomains[host]? isDNSChain = ( (category == libHTTPS.categories.NO_SNI) or ((not unblockSettings.enabled) and category == libHTTPS.categories.SNI) or (unblockSettings.enabled and (host in unblockSettings.acceptApiCallsTo)) or ((host?.split(".")[-1..][0]) == "dns") ) isUnblock = false [destination, port, error] = if isRouted ["127.0.0.1", unblockSettings.routeDomains[host], false] else if isDNSChain ["127.0.0.1", httpSettings.internalTLSPort, false] else if isUnblock [host, 443, false] else ["", -1, true] if error @log.error "Illegal domain (#{host})" cb() return c?.destroy() libHTTPS.getStream destination, port, (err, stream) => if err? @log.error gLineInfo "Tunnel failed: Could not connect to internal TLS Server" c?.destroy() cb() return stream?.destroy() stream.write buf c.pipe(stream).pipe(c) c.resume() @log.debug gLineInfo "Tunnel: #{host}" cb() getFingerprint: -> httpsVars.fingerprint