# Module `onionr.httpapi.security.client`

Onionr - Private P2P Communication

Process incoming requests to the client api server to validate they are legitimate

Source code

    '''
        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', 'staticfiles.onionrhome']

    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
                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 == 'siteapi.site':
                    resp.headers['Content-Security-Policy'] = "default-src 'none'; style-src data: 'unsafe-inline'; img-src 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

## Classes

`class ClientAPISecurity (client_api)`
  Source code

      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
                  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 == 'siteapi.site':
                      resp.headers['Content-Security-Policy'] = "default-src 'none'; style-src data: 'unsafe-inline'; img-src 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