# -*- coding: utf-8 -*- # vi:si:et:sw=4:sts=4:ts=4 from socketserver import ThreadingMixIn from threading import Thread import base64 import db import gzip import hashlib import http.server import io import json import os import socket import socketserver from Crypto.PublicKey import RSA from Crypto.Util.asn1 import DerSequence from OpenSSL.crypto import dump_privatekey, FILETYPE_ASN1 from OpenSSL.SSL import ( Context, Connection, TLSv1_2_METHOD, VERIFY_PEER, VERIFY_FAIL_IF_NO_PEER_CERT, VERIFY_CLIENT_ONCE ) import settings import state import user from . import nodeapi from .sslsocket import fileobject import logging logger = logging.getLogger(__name__) def get_service_id(key): ''' service_id is the first half of the sha1 of the rsa public key encoded in base32 ''' # compute sha1 of public key and encode first half in base32 pub_der = DerSequence() pub_der.decode(dump_privatekey(FILETYPE_ASN1, key)) public_key = RSA.construct((pub_der._seq[1], pub_der._seq[2])).exportKey('DER')[22:] service_id = base64.b32encode(hashlib.sha1(public_key).digest()[:10]).lower().decode() return service_id class TLSTCPServer(socketserver.TCPServer): def _accept(self, connection, x509, errnum, errdepth, ok): # client_id is validated in request return True def __init__(self, server_address, HandlerClass, bind_and_activate=True): socketserver.TCPServer.__init__(self, server_address, HandlerClass) ctx = Context(TLSv1_2_METHOD) ctx.use_privatekey_file (settings.ssl_key_path) ctx.use_certificate_file(settings.ssl_cert_path) # only allow clients with cert: ctx.set_verify(VERIFY_PEER | VERIFY_CLIENT_ONCE | VERIFY_FAIL_IF_NO_PEER_CERT, self._accept) #ctx.set_verify(VERIFY_PEER | VERIFY_CLIENT_ONCE, self._accept) self.socket = Connection(ctx, socket.socket(self.address_family, self.socket_type)) if bind_and_activate: self.server_bind() self.server_activate() def shutdown_request(self,request): try: request.shutdown() except: pass class NodeServer(ThreadingMixIn, TLSTCPServer): allow_reuse_address = True def api_call(action, user_id, args): with db.session(): u = user.models.User.get(user_id) if action in ( 'requestPeering', 'acceptPeering', 'rejectPeering', 'removePeering' ) or (u and u.peered): content = getattr(nodeapi, 'api_' + action)(user_id, *args) else: if u and u.pending: logger.debug('ignore request from pending peer[%s] %s (%s)', user_id, action, args) content = {} else: content = None return content class Handler(http.server.SimpleHTTPRequestHandler): def setup(self): self.connection = self.request self.rfile = fileobject(self.connection, 'rb', self.rbufsize) self.wfile = fileobject(self.connection, 'wb', self.wbufsize) def version_string(self): return settings.USER_AGENT def do_HEAD(self): return self.do_GET() def do_GET(self): import item.models id = self.path.split('/')[-1] if self.path.startswith('/get/') else None if id and len(id) == 32 and id.isalnum(): with db.session(): i = item.models.Item.get(id) if not i: self.send_response(404, 'Not Found') self.send_header('Content-type', 'text/plain') self.end_headers() self.wfile.write(b'404 - Not Found') return path = i.get_path() mimetype = { 'epub': 'application/epub+zip', 'pdf': 'application/pdf', 'txt': 'text/plain', }.get(path.split('.')[-1], None) self.send_response(200, 'OK') self.send_header('Content-Type', mimetype) self.send_header('X-Node-Protocol', settings.NODE_PROTOCOL) self.send_header('Content-Length', str(os.path.getsize(path))) self.end_headers() logger.debug('GET file %s', id) with open(path, 'rb') as f: while 1: data = f.read(16384) if not data: break self.wfile.write(data) else: self.send_response(200, 'OK') self.send_header('Content-type', 'text/plain') self.send_header('X-Node-Protocol', settings.NODE_PROTOCOL) self.end_headers() self.wfile.write('Open Media Library\n'.encode()) def gzip_data(self, data): encoding = self.headers.get('Accept-Encoding') if encoding.find('gzip') != -1: self.send_header('Content-Encoding', 'gzip') bytes_io = io.BytesIO() gzip_file = gzip.GzipFile(fileobj=bytes_io, mode='wb') gzip_file.write(data) gzip_file.close() result = bytes_io.getvalue() bytes_io.close() return result else: return data def gunzip_data(self, data): bytes_io = io.BytesIO(data) gzip_file = gzip.GzipFile(fileobj=bytes_io, mode='rb') result = gzip_file.read() gzip_file.close() return result def do_POST(self): ''' API pullChanges [userid] from [to] pushChanges [index, change] requestPeering username message acceptPeering username message rejectPeering message removePeering message ping responds public ip ''' x509 = self.connection.get_peer_certificate() user_id = get_service_id(x509.get_pubkey()) if x509 else None content = {} try: content_len = int(self.headers.get('content-length', 0)) data = self.rfile.read(content_len) if self.headers.get('Content-Encoding') == 'gzip': data = self.gunzip_data(data) except: logger.debug('invalid request', exc_info=1) response_status = (500, 'invalid request') self.write_response(response_status, content) return response_status = (200, 'OK') if self.headers.get('X-Node-Protocol', '') > settings.NODE_PROTOCOL: state.update_required = True if self.headers.get('X-Node-Protocol', '') != settings.NODE_PROTOCOL: logger.debug('protocol missmatch %s vs %s', self.headers.get('X-Node-Protocol', ''), settings.NODE_PROTOCOL) logger.debug('headers %s', self.headers) content = settings.release else: try: action, args = json.loads(data.decode('utf-8')) except: logger.debug('invalid data: %s', data, exc_info=1) response_status = (500, 'invalid request') content = { 'status': 'invalid request' } self.write_response(response_status, content) return logger.debug('NODE action %s %s (%s)', action, args, user_id) if action == 'ping': content = { 'status': 'ok' } else: content = api_call(action, user_id, args) if content is None: content = {'status': 'not peered'} logger.debug('PEER %s IS UNKNOWN SEND 403', user_id) response_status = (403, 'UNKNOWN USER') content = {} else: logger.debug('RESPONSE %s: %s', action, content) self.write_response(response_status, content) def write_response(self, response_status, content): self.send_response(*response_status) self.send_header('X-Node-Protocol', settings.NODE_PROTOCOL) self.send_header('Content-Type', 'application/json') content = json.dumps(content, ensure_ascii=False).encode('utf-8') content = self.gzip_data(content) self.send_header('Content-Length', str(len(content))) self.end_headers() self.wfile.write(content) class Server(Thread): http_server = None def __init__(self): Thread.__init__(self) address = (settings.server['node_address'], settings.server['node_port']) self.http_server = NodeServer(address, Handler) self.daemon = True self.start() def run(self): self.http_server.serve_forever() def stop(self): if self.http_server: self.http_server.shutdown() self.http_server.socket.close() return Thread.join(self) def start(): return Server()