331 lines
12 KiB
Python
Executable File
331 lines
12 KiB
Python
Executable File
'''
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Onionr - P2P Microblogging Platform & Social network
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This file handles all incoming http requests to the client, using Flask
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'''
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'''
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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'''
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import flask
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from flask import request, Response, abort, send_from_directory
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from multiprocessing import Process
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from gevent.wsgi import WSGIServer
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import sys, random, threading, hmac, hashlib, base64, time, math, os, logger, config
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from core import Core
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from onionrblockapi import Block
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import onionrutils, onionrcrypto, blockimporter
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class API:
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'''
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Main HTTP API (Flask)
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'''
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def validateToken(self, token):
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'''
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Validate that the client token matches the given token
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'''
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try:
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if not hmac.compare_digest(self.clientToken, token):
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return False
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else:
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return True
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except TypeError:
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return False
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def __init__(self, debug):
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'''
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Initialize the api server, preping variables for later use
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This initilization defines all of the API entry points and handlers for the endpoints and errors
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This also saves the used host (random localhost IP address) to the data folder in host.txt
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'''
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config.reload()
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if config.get('dev_mode', True):
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self._developmentMode = True
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logger.set_level(logger.LEVEL_DEBUG)
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else:
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self._developmentMode = False
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logger.set_level(logger.LEVEL_INFO)
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self.debug = debug
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self._privateDelayTime = 3
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self._core = Core()
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self._crypto = onionrcrypto.OnionrCrypto(self._core)
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self._utils = onionrutils.OnionrUtils(self._core)
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app = flask.Flask(__name__)
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bindPort = int(config.get('client.port', 59496))
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self.bindPort = bindPort
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self.clientToken = config.get('client.hmac')
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self.timeBypassToken = base64.b16encode(os.urandom(32)).decode()
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self.i2pEnabled = config.get('i2p.host', False)
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self.mimeType = 'text/plain'
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with open('data/time-bypass.txt', 'w') as bypass:
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bypass.write(self.timeBypassToken)
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if not debug and not self._developmentMode:
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hostOctets = [127, random.randint(0x02, 0xFF), random.randint(0x02, 0xFF), random.randint(0x02, 0xFF)]
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self.host = '.'.join(hostOctets)
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else:
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self.host = '127.0.0.1'
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with open('data/host.txt', 'w') as file:
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file.write(self.host)
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@app.before_request
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def beforeReq():
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'''
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Simply define the request as not having yet failed, before every request.
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'''
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self.requestFailed = False
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return
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@app.after_request
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def afterReq(resp):
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if not self.requestFailed:
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resp.headers['Access-Control-Allow-Origin'] = '*'
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#else:
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# resp.headers['server'] = 'Onionr'
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resp.headers['Content-Type'] = self.mimeType
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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'"
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resp.headers['X-Frame-Options'] = 'deny'
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resp.headers['X-Content-Type-Options'] = "nosniff"
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resp.headers['server'] = 'Onionr'
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# reset to text/plain to help prevent browser attacks
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if self.mimeType != 'text/plain':
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self.mimeType = 'text/plain'
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return resp
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@app.route('/client/ui/<path:path>')
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def webUI(path):
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startTime = math.floor(time.time())
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if request.args.get('timingToken') is None:
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timingToken = ''
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else:
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timingToken = request.args.get('timingToken')
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self.validateHost('private')
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endTime = math.floor(time.time())
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elapsed = endTime - startTime
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if not hmac.compare_digest(timingToken, self.timeBypassToken):
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if elapsed < self._privateDelayTime:
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time.sleep(self._privateDelayTime - elapsed)
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return send_from_directory('static-data/ui/', path)
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@app.route('/client/')
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def private_handler():
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if request.args.get('timingToken') is None:
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timingToken = ''
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else:
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timingToken = request.args.get('timingToken')
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data = request.args.get('data')
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try:
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data = data
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except:
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data = ''
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startTime = math.floor(time.time())
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action = request.args.get('action')
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#if not self.debug:
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token = request.args.get('token')
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if not self.validateToken(token):
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abort(403)
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self.validateHost('private')
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if action == 'hello':
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resp = Response('Hello, World! ' + request.host)
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elif action == 'shutdown':
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# request.environ.get('werkzeug.server.shutdown')()
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self.http_server.stop()
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resp = Response('Goodbye')
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elif action == 'ping':
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resp = Response('pong')
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elif action == 'site':
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block = data
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siteData = self._core.getData(data)
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response = 'not found'
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if siteData != '' and siteData != False:
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self.mimeType = 'text/html'
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response = siteData.split(b'-', 2)[-1]
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resp = Response(response)
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else:
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resp = Response('(O_o) Dude what? (invalid command)')
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endTime = math.floor(time.time())
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elapsed = endTime - startTime
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# if bypass token not used, delay response to prevent timing attacks
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if not hmac.compare_digest(timingToken, self.timeBypassToken):
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if elapsed < self._privateDelayTime:
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time.sleep(self._privateDelayTime - elapsed)
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return resp
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@app.route('/')
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def banner():
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self.mimeType = 'text/html'
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self.validateHost('public')
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try:
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with open('static-data/index.html', 'r') as html:
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resp = Response(html.read())
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except FileNotFoundError:
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resp = Response("")
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return resp
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@app.route('/public/upload/', methods=['POST'])
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def blockUpload():
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self.validateHost('public')
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resp = 'failure'
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try:
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data = request.form['block']
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except KeyError:
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logger.warn('No block specified for upload')
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pass
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else:
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if sys.getsizeof(data) < 100000000:
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if blockimporter.importBlockFromData(data, self._core):
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resp = 'success'
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else:
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logger.warn('Error encountered importing uploaded block')
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resp = Response(resp)
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return resp
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@app.route('/public/')
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def public_handler():
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# Public means it is publicly network accessible
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self.validateHost('public')
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action = request.args.get('action')
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requestingPeer = request.args.get('myID')
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data = request.args.get('data')
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try:
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data = data
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except:
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data = ''
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if action == 'firstConnect':
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pass
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elif action == 'ping':
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resp = Response("pong!")
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elif action == 'getSymmetric':
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resp = Response(self._crypto.generateSymmetric())
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elif action == 'getDBHash':
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resp = Response(self._utils.getBlockDBHash())
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elif action == 'getBlockHashes':
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resp = Response('\n'.join(self._core.getBlockList()))
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elif action == 'directMessage':
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resp = Response(self._core.handle_direct_connection(data))
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elif action == 'announce':
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if data != '':
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# TODO: require POW for this
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if self._core.addAddress(data):
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resp = Response('Success')
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else:
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resp = Response('')
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else:
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resp = Response('')
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# setData should be something the communicator initiates, not this api
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elif action == 'getData':
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resp = ''
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if self._utils.validateHash(data):
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if not os.path.exists('data/blocks/' + data + '.db'):
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block = Block(hash=data.encode(), core=self._core)
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resp = base64.b64encode(block.getRaw().encode()).decode()
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if len(resp) == 0:
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abort(404)
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resp = ""
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resp = Response(resp)
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elif action == 'pex':
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response = ','.join(self._core.listAdders())
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if len(response) == 0:
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response = 'none'
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resp = Response(response)
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elif action == 'kex':
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peers = self._core.listPeers(getPow=True)
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response = ','.join(peers)
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resp = Response(response)
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else:
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resp = Response("")
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return resp
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@app.errorhandler(404)
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def notfound(err):
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self.requestFailed = True
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resp = Response("")
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return resp
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@app.errorhandler(403)
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def authFail(err):
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self.requestFailed = True
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resp = Response("403")
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return resp
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@app.errorhandler(401)
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def clientError(err):
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self.requestFailed = True
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resp = Response("Invalid request")
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return resp
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if not os.environ.get("WERKZEUG_RUN_MAIN") == "true":
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logger.info('Starting client on ' + self.host + ':' + str(bindPort) + '...', timestamp=False)
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try:
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self.http_server = WSGIServer((self.host, bindPort), app)
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self.http_server.serve_forever()
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except KeyboardInterrupt:
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pass
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#app.run(host=self.host, port=bindPort, debug=False, threaded=True)
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except Exception as e:
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logger.error(str(e))
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logger.fatal('Failed to start client on ' + self.host + ':' + str(bindPort) + ', exiting...')
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exit(1)
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def validateHost(self, hostType):
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'''
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Validate various features of the request including:
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If private (/client/), is the host header local?
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If public (/public/), is the host header onion or i2p?
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Was X-Request-With used?
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'''
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if self.debug:
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return
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# Validate host header, to protect against DNS rebinding attacks
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host = self.host
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if hostType == 'private':
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if not request.host.startswith('127') and not self._utils.checkIsIP(request.host):
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abort(403)
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elif hostType == 'public':
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if not request.host.endswith('onion') and not request.host.endswith('i2p'):
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abort(403)
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# Validate x-requested-with, to protect against CSRF/metadata leaks
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if not self.i2pEnabled and request.host.endswith('i2p'):
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abort(403)
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if not self._developmentMode:
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try:
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request.headers['X-Requested-With']
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except:
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# we exit rather than abort to avoid fingerprinting
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logger.debug('Avoiding fingerprinting, exiting...')
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sys.exit(1)
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