[refactor] separate tcp map server code

Separate the common tcp map server code, used for both alias resolver and
recipient access checker, to its own file.

1 files changed, 76 insertions, 0 deletions

diff --git a/src/leap/mx/tcp_map.py b/src/leap/mx/tcp_map.py
new file mode 100644
index 0000000..b7066ff
--- /dev/null
+++ b/src/leap/mx/tcp_map.py
@@ -0,0 +1,76 @@
+#!/usr/bin/env python
+# -*- encoding: utf-8 -*-
+# tcpmap.py
+# Copyright (C) 2015 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/>.
+
+
+from twisted.python import log
+from twisted.internet import defer
+from twisted.internet.protocol import ServerFactory
+
+
+# For info on codes, see: http://www.postfix.org/tcp_table.5.html
+TCP_MAP_CODE_SUCCESS = 200
+TCP_MAP_CODE_TEMPORARY_FAILURE = 400
+TCP_MAP_CODE_PERMANENT_FAILURE = 500
+
+
+class LEAPPostfixTCPMapServerFactory(ServerFactory):
+    """
+    A factory for postfix tcp map servers.
+    """
+
+    def __init__(self, couchdb):
+        """
+        Initialize the factory.
+
+        :param couchdb: A CouchDB client.
+        :type couchdb: leap.mx.couchdbhelper.ConnectedCouchDB
+        """
+        self._cdb = couchdb
+
+    def _getPubKey(self, uuid):
+        """
+        Look up PGP public key based on user uid.
+
+        :param uuid: The user uid.
+        :type uuid: str
+
+        :return: A deferred that is fired with the uuid and the public key, if
+                 available.
+        :rtype: DeferredList
+        """
+        if uuid is None:
+            return defer.succeed([None, None])
+        return defer.gatherResults([
+            defer.succeed(uuid),
+            self._cdb.getPubKey(uuid),
+        ])
+
+    def get(self, key):
+        """
+        Look up uuid based on key, only up to the username id of the key.
+
+        At some point we will have to consider the domain part too.
+
+        :param key: The lookup key.
+        :type key: str
+        """
+        log.msg("Query key: %s" % (key,))
+        d = self._cdb.queryByAddress(key)
+        d.addCallback(self._getPubKey)
+        d.addErrback(log.err)
+        return d