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