''' Onionr - P2P Microblogging Platform & Social network This file handles all incoming http requests to the client, using Flask ''' ''' This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . ''' import flask from flask import request, Response, abort, send_from_directory from multiprocessing import Process from gevent.pywsgi import WSGIServer import sys, random, threading, hmac, hashlib, base64, time, math, os, json from core import Core from onionrblockapi import Block import onionrutils, onionrexceptions, onionrcrypto, blockimporter, onionrevents as events, logger, config class API: ''' Main HTTP API (Flask) ''' callbacks = {'public' : {}, 'private' : {}} def validateToken(self, token): ''' Validate that the client token matches the given token ''' try: if not hmac.compare_digest(self.clientToken, token): return False else: return True except TypeError: return False def guessMime(path): ''' Guesses the mime type from the input filename ''' mimetypes = { 'html' : 'text/html', 'js' : 'application/javascript', 'css' : 'text/css', 'png' : 'image/png', 'jpg' : 'image/jpeg' } for mimetype in mimetypes: if path.endswith('.%s' % mimetype): return mimetypes[mimetype] return 'text/plain' def __init__(self, debug): ''' Initialize the api server, preping variables for later use This initilization defines all of the API entry points and handlers for the endpoints and errors This also saves the used host (random localhost IP address) to the data folder in host.txt ''' config.reload() if config.get('dev_mode', True): self._developmentMode = True logger.set_level(logger.LEVEL_DEBUG) else: self._developmentMode = False logger.set_level(logger.LEVEL_INFO) self.debug = debug self._privateDelayTime = 3 self._core = Core() self._crypto = onionrcrypto.OnionrCrypto(self._core) self._utils = onionrutils.OnionrUtils(self._core) app = flask.Flask(__name__) bindPort = int(config.get('client.port', 59496)) self.bindPort = bindPort self.clientToken = config.get('client.hmac') self.timeBypassToken = base64.b16encode(os.urandom(32)).decode() self.i2pEnabled = config.get('i2p.host', False) self.mimeType = 'text/plain' self.overrideCSP = False with open('data/time-bypass.txt', 'w') as bypass: bypass.write(self.timeBypassToken) if not debug and not self._developmentMode: hostOctets = [127, random.randint(0x02, 0xFF), random.randint(0x02, 0xFF), random.randint(0x02, 0xFF)] self.host = '.'.join(hostOctets) else: self.host = '127.0.0.1' with open('data/host.txt', 'w') as file: file.write(self.host) @app.before_request def beforeReq(): ''' Simply define the request as not having yet failed, before every request. ''' self.requestFailed = False return @app.after_request def afterReq(resp): if not self.requestFailed: resp.headers['Access-Control-Allow-Origin'] = '*' #else: # resp.headers['server'] = 'Onionr' resp.headers['Content-Type'] = self.mimeType if not self.overrideCSP: resp.headers["Content-Security-Policy"] = "default-src 'none'; script-src 'none'; object-src 'none'; style-src data: 'unsafe-inline'; img-src data:; media-src 'none'; frame-src 'none'; font-src 'none'; connect-src 'none'" resp.headers['X-Frame-Options'] = 'deny' resp.headers['X-Content-Type-Options'] = "nosniff" resp.headers['server'] = 'Onionr' # reset to text/plain to help prevent browser attacks self.mimeType = 'text/plain' self.overrideCSP = False return resp @app.route('/www/private/') def www_private(path): startTime = math.floor(time.time()) if request.args.get('timingToken') is None: timingToken = '' else: timingToken = request.args.get('timingToken') if not config.get("www.private.run", True): abort(403) self.validateHost('private') endTime = math.floor(time.time()) elapsed = endTime - startTime if not hmac.compare_digest(timingToken, self.timeBypassToken): if elapsed < self._privateDelayTime: time.sleep(self._privateDelayTime - elapsed) return send_from_directory('static-data/www/private/', path) @app.route('/www/public/') def www_public(path): if not config.get("www.public.run", True): abort(403) self.validateHost('public') return send_from_directory('static-data/www/public/', path) @app.route('/ui/') def ui_private(path): startTime = math.floor(time.time()) ''' if request.args.get('timingToken') is None: timingToken = '' else: timingToken = request.args.get('timingToken') ''' if not config.get("www.ui.run", True): abort(403) if config.get("www.ui.private", True): self.validateHost('private') else: self.validateHost('public') ''' endTime = math.floor(time.time()) elapsed = endTime - startTime if not hmac.compare_digest(timingToken, self.timeBypassToken): if elapsed < self._privateDelayTime: time.sleep(self._privateDelayTime - elapsed) ''' self.mimeType = API.guessMime(path) self.overrideCSP = True logger.debug('Serving %s (mime: %s)' % (path, self.mimeType)) return send_from_directory('static-data/www/ui/dist/', path, mimetype = API.guessMime(path)) @app.route('/client/') def private_handler(): if request.args.get('timingToken') is None: timingToken = '' else: timingToken = request.args.get('timingToken') data = request.args.get('data') try: data = data except: data = '' startTime = math.floor(time.time()) action = request.args.get('action') #if not self.debug: token = request.args.get('token') if not self.validateToken(token): abort(403) events.event('webapi_private', onionr = None, data = {'action' : action, 'data' : data, 'timingToken' : timingToken, 'token' : token}) self.validateHost('private') if action == 'hello': resp = Response('Hello, World! ' + request.host) elif action == 'shutdown': # request.environ.get('werkzeug.server.shutdown')() self.http_server.stop() resp = Response('Goodbye') elif action == 'ping': resp = Response('pong') elif action == "insertBlock": response = {'success' : False, 'reason' : 'An unknown error occurred'} if not ((data is None) or (len(str(data).strip()) == 0)): try: decoded = json.loads(data) block = Block() sign = False for key in decoded: val = decoded[key] key = key.lower() if key == 'type': block.setType(val) elif key in ['body', 'content']: block.setContent(val) elif key == 'parent': block.setParent(val) elif key == 'sign': sign = (str(val).lower() == 'true') hash = block.save(sign = sign) if not hash is False: response['success'] = True response['hash'] = hash response['reason'] = 'Successfully wrote block to file' else: response['reason'] = 'Failed to save the block' except Exception as e: logger.warn('insertBlock api request failed', error = e) logger.debug('Here\'s the request: %s' % data) else: response = {'success' : False, 'reason' : 'Missing `data` parameter.', 'blocks' : {}} resp = Response(json.dumps(response)) elif action == 'searchBlocks': response = {'success' : False, 'reason' : 'An unknown error occurred', 'blocks' : {}} if not ((data is None) or (len(str(data).strip()) == 0)): try: decoded = json.loads(data) type = None signer = None signed = None parent = None reverse = False limit = None for key in decoded: val = decoded[key] key = key.lower() if key == 'type': type = str(val) elif key == 'signer': if isinstance(val, list): signer = val else: signer = str(val) elif key == 'signed': signed = (str(val).lower() == 'true') elif key == 'parent': parent = str(val) elif key == 'reverse': reverse = (str(val).lower() == 'true') elif key == 'limit': limit = 10000 if val is None: val = limit limit = min(limit, int(val)) blockObjects = Block.getBlocks(type = type, signer = signer, signed = signed, parent = parent, reverse = reverse, limit = limit) logger.debug('%s results for query %s' % (len(blockObjects), decoded)) blocks = list() for block in blockObjects: blocks.append({ 'hash' : block.getHash(), 'type' : block.getType(), 'content' : block.getContent(), 'signature' : block.getSignature(), 'signedData' : block.getSignedData(), 'signed' : block.isSigned(), 'valid' : block.isValid(), 'date' : (int(block.getDate().strftime("%s")) if not block.getDate() is None else None), 'parent' : (block.getParent().getHash() if not block.getParent() is None else None), 'metadata' : block.getMetadata(), 'header' : block.getHeader() }) response['success'] = True response['blocks'] = blocks response['reason'] = 'Success' except Exception as e: logger.warn('searchBlock api request failed', error = e) logger.debug('Here\'s the request: %s' % data) else: response = {'success' : False, 'reason' : 'Missing `data` parameter.', 'blocks' : {}} resp = Response(json.dumps(response)) elif action in API.callbacks['private']: resp = Response(str(getCallback(action, scope = 'private')(request))) else: resp = Response('(O_o) Dude what? (invalid command)') endTime = math.floor(time.time()) elapsed = endTime - startTime # if bypass token not used, delay response to prevent timing attacks if not hmac.compare_digest(timingToken, self.timeBypassToken): if elapsed < self._privateDelayTime: time.sleep(self._privateDelayTime - elapsed) return resp @app.route('/') def banner(): self.mimeType = 'text/html' self.validateHost('public') try: with open('static-data/index.html', 'r') as html: resp = Response(html.read()) except FileNotFoundError: resp = Response("") return resp @app.route('/public/upload/', methods=['POST']) def blockUpload(): self.validateHost('public') resp = 'failure' try: data = request.form['block'] except KeyError: logger.warn('No block specified for upload') pass else: if sys.getsizeof(data) < 100000000: try: if blockimporter.importBlockFromData(data, self._core): resp = 'success' else: logger.warn('Error encountered importing uploaded block') except onionrexceptions.BlacklistedBlock: logger.debug('uploaded block is blacklisted') pass resp = Response(resp) return resp @app.route('/public/announce/', methods=['POST']) def acceptAnnounce(): self.validateHost('public') resp = 'failure' powHash = '' randomData = '' newNode = '' ourAdder = self._core.hsAddress.encode() try: newNode = request.form['node'].encode() except KeyError: logger.warn('No block specified for upload') pass else: try: randomData = request.form['random'] randomData = base64.b64decode(randomData) except KeyError: logger.warn('No random data specified for upload') else: nodes = newNode + self._core.hsAddress.encode() nodes = self._core._crypto.blake2bHash(nodes) powHash = self._core._crypto.blake2bHash(randomData + nodes) try: powHash = powHash.decode() except AttributeError: pass if powHash.startswith('0000'): try: newNode = newNode.decode() except AttributeError: pass if self._core.addAddress(newNode): resp = 'Success' else: logger.warn(newNode.decode() + ' failed to meet POW: ' + powHash) resp = Response(resp) return resp @app.route('/public/') def public_handler(): # Public means it is publicly network accessible self.validateHost('public') action = request.args.get('action') requestingPeer = request.args.get('myID') data = request.args.get('data') try: data = data except: data = '' events.event('webapi_public', onionr = None, data = {'action' : action, 'data' : data, 'requestingPeer' : requestingPeer, 'request' : request}) if action == 'firstConnect': pass elif action == 'ping': resp = Response("pong!") elif action == 'getSymmetric': resp = Response(self._crypto.generateSymmetric()) elif action == 'getDBHash': resp = Response(self._utils.getBlockDBHash()) elif action == 'getBlockHashes': resp = Response('\n'.join(self._core.getBlockList())) # setData should be something the communicator initiates, not this api elif action == 'getData': resp = '' if self._utils.validateHash(data): if os.path.exists('data/blocks/' + data + '.dat'): block = Block(hash=data.encode(), core=self._core) resp = base64.b64encode(block.getRaw().encode()).decode() if len(resp) == 0: abort(404) resp = "" resp = Response(resp) elif action == 'pex': response = ','.join(self._core.listAdders()) if len(response) == 0: response = 'none' resp = Response(response) elif action == 'kex': peers = self._core.listPeers(getPow=True) response = ','.join(peers) resp = Response(response) elif action in API.callbacks['public']: resp = Response(str(getCallback(action, scope = 'public')(request))) else: resp = Response("") return resp @app.errorhandler(404) def notfound(err): self.requestFailed = True resp = Response("") return resp @app.errorhandler(403) def authFail(err): self.requestFailed = True resp = Response("403") return resp @app.errorhandler(401) def clientError(err): self.requestFailed = True resp = Response("Invalid request") return resp if not os.environ.get("WERKZEUG_RUN_MAIN") == "true": logger.info('Starting client on ' + self.host + ':' + str(bindPort) + '...', timestamp=False) try: while len(self._core.hsAddress) == 0: self._core.refreshFirstStartVars() time.sleep(0.5) self.http_server = WSGIServer((self.host, bindPort), app) self.http_server.serve_forever() except KeyboardInterrupt: pass except Exception as e: logger.error(str(e)) logger.fatal('Failed to start client on ' + self.host + ':' + str(bindPort) + ', exiting...') exit(1) def validateHost(self, hostType): ''' Validate various features of the request including: If private (/client/), is the host header local? If public (/public/), is the host header onion or i2p? Was X-Request-With used? ''' if self.debug: return # Validate host header, to protect against DNS rebinding attacks host = self.host if hostType == 'private': if not request.host.startswith('127') and not self._utils.checkIsIP(request.host): abort(403) elif hostType == 'public': if not request.host.endswith('onion') and not request.host.endswith('i2p'): abort(403) # Validate x-requested-with, to protect against CSRF/metadata leaks if not self.i2pEnabled and request.host.endswith('i2p'): abort(403) if not self._developmentMode: try: request.headers['X-Requested-With'] except: # we exit rather than abort to avoid fingerprinting logger.debug('Avoiding fingerprinting, exiting...') sys.exit(1) def setCallback(action, callback, scope = 'public'): if not scope in API.callbacks: return False API.callbacks[scope][action] = callback return True def removeCallback(action, scope = 'public'): if (not scope in API.callbacks) or (not action in API.callbacks[scope]): return False del API.callbacks[scope][action] return True def getCallback(action, scope = 'public'): if (not scope in API.callbacks) or (not action in API.callbacks[scope]): return None return API.callbacks[scope][action] def getCallbacks(scope = None): if (not scope is None) and (scope in API.callbacks): return API.callbacks[scope] return API.callbacks