Private Decentralized Communication Network
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'''
Onionr - Private P2P Communication
Process incoming requests to the client api server to validate they are legitimate
'''
'''
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 <https://www.gnu.org/licenses/>.
'''
import hmac
from flask import Blueprint, request, abort, g
from onionrservices import httpheaders
from . import pluginwhitelist
# Be extremely mindful of this. These are endpoints available without a password
whitelist_endpoints = ['www', 'staticfiles.homedata', 'staticfiles.sharedContent',
'staticfiles.friends', 'staticfiles.friendsindex', 'siteapi.site', 'siteapi.siteFile', 'staticfiles.onionrhome',
'themes.getTheme', 'staticfiles.onboarding', 'staticfiles.onboardingIndex']
class ClientAPISecurity:
def __init__(self, client_api):
client_api_security_bp = Blueprint('clientapisecurity', __name__)
self.client_api_security_bp = client_api_security_bp
self.client_api = client_api
pluginwhitelist.load_plugin_security_whitelist_endpoints(whitelist_endpoints)
@client_api_security_bp.before_app_request
def validate_request():
'''Validate request has set password and is the correct hostname'''
# For the purpose of preventing DNS rebinding attacks
if request.host != '%s:%s' % (client_api.host, client_api.bindPort):
abort(403)
# Add shared objects
try:
g.too_many = self.client_api._too_many
except KeyError:
g.too_many = None
if request.endpoint in whitelist_endpoints:
return
if request.path.startswith('/site/'): return
try:
if not hmac.compare_digest(request.headers['token'], client_api.clientToken):
if not hmac.compare_digest(request.form['token'], client_api.clientToken):
abort(403)
except KeyError:
if not hmac.compare_digest(request.form['token'], client_api.clientToken):
abort(403)
@client_api_security_bp.after_app_request
def after_req(resp):
# Security headers
resp = httpheaders.set_default_onionr_http_headers(resp)
if request.endpoint in ('siteapi.site', 'siteapi.siteFile'):
resp.headers['Content-Security-Policy'] = "default-src 'none'; style-src 'self' data: 'unsafe-inline'; img-src 'self' data:; media-src 'self' data:"
else:
resp.headers['Content-Security-Policy'] = "default-src 'none'; script-src 'self'; object-src 'none'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; media-src 'none'; frame-src 'none'; font-src 'self'; connect-src 'self'"
return resp