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-rw-r--r--src/leap/common/events/auth.py96
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diff --git a/src/leap/common/events/auth.py b/src/leap/common/events/auth.py
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+++ b/src/leap/common/events/auth.py
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+# -*- coding: utf-8 -*-
+# auth.py
+# Copyright (C) 2016 LEAP
+#
+# 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 <http://www.gnu.org/licenses/>.
+"""
+ZAP authentication, twisted style.
+"""
+from zmq import PAIR
+from zmq.auth.base import Authenticator, VERSION
+from txzmq.connection import ZmqConnection
+from zmq.utils.strtypes import b, u
+
+from twisted.python import log
+
+from txzmq.connection import ZmqEndpoint, ZmqEndpointType
+
+
+class TxAuthenticator(ZmqConnection):
+
+ """
+ This does not implement the whole ZAP protocol, but the bare minimum that
+ we need.
+ """
+
+ socketType = PAIR
+ address = 'inproc://zeromq.zap.01'
+ encoding = 'utf-8'
+
+ def __init__(self, factory):
+ super(TxAuthenticator, self).__init__(factory)
+ self.authenticator = Authenticator(factory.context)
+ self.authenticator._send_zap_reply = self._send_zap_reply
+
+ def start(self):
+ endpoint = ZmqEndpoint(ZmqEndpointType.bind, self.address)
+ self.addEndpoints([endpoint])
+
+ def messageReceived(self, msg):
+
+ command = msg[0]
+
+ if command == b'ALLOW':
+ addresses = [u(m, self.encoding) for m in msg[1:]]
+ try:
+ self.authenticator.allow(*addresses)
+ except Exception as e:
+ log.err("Failed to allow %s", addresses)
+
+ elif command == b'CURVE':
+ domain = u(msg[1], self.encoding)
+ location = u(msg[2], self.encoding)
+ self.authenticator.configure_curve(domain, location)
+
+ def _send_zap_reply(self, request_id, status_code, status_text,
+ user_id='user'):
+ """
+ Send a ZAP reply to finish the authentication.
+ """
+ user_id = user_id if status_code == b'200' else b''
+ if isinstance(user_id, unicode):
+ user_id = user_id.encode(self.encoding, 'replace')
+ metadata = b'' # not currently used
+ reply = [VERSION, request_id, status_code, status_text,
+ user_id, metadata]
+ self.send(reply)
+
+
+class TxAuthenticationRequest(ZmqConnection):
+
+ socketType = PAIR
+ address = 'inproc://zeromq.zap.01'
+ encoding = 'utf-8'
+
+ def start(self):
+ endpoint = ZmqEndpoint(ZmqEndpointType.connect, self.address)
+ self.addEndpoints([endpoint])
+
+ def allow(self, *addresses):
+ self.send([b'ALLOW'] + [b(a, self.encoding) for a in addresses])
+
+ def configure_curve(self, domain='*', location=''):
+ domain = b(domain, self.encoding)
+ location = b(location, self.encoding)
+ self.send([b'CURVE', domain, location])