[openpgp] Inital commit

openpgp/modules/pgp_keylist.py

@@ -0,0 +1,124 @@
+# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
+#
+# This file is part of Gajim.
+#
+# Gajim 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; version 3 only.
+#
+# Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
+
+# XEP-0373: OpenPGP for XMPP
+
+import logging
+import time
+
+import nbxmpp
+
+from gajim.common import app
+from gajim.common.exceptions import StanzaMalformed
+from gajim.common.modules.pep import AbstractPEPModule, AbstractPEPData
+from gajim.common.modules.date_and_time import parse_datetime
+
+from openpgp.modules import util
+from openpgp.modules.util import Key
+
+log = logging.getLogger('gajim.plugin_system.openpgp.pep')
+
+# Module name
+name = 'PGPKeylist'
+zeroconf = False
+
+
+class PGPKeylistData(AbstractPEPData):
+
+    type_ = 'openpgp-keylist'
+
+    def __init__(self, keylist):
+        self._pep_specific_data = keylist
+        self.data = keylist
+
+
+class PGPKeylist(AbstractPEPModule):
+    '''
+    <item>
+        <public-keys-list xmlns='urn:xmpp:openpgp:0'>
+          <pubkey-metadata
+            v4-fingerprint='1357B01865B2503C18453D208CAC2A9678548E35'
+            date='2018-03-01T15:26:12Z'
+            />
+          <pubkey-metadata
+            v4-fingerprint='67819B343B2AB70DED9320872C6464AF2A8E4C02'
+            date='1953-05-16T12:00:00Z'
+            />
+        </public-keys-list>
+      </item>
+    '''
+
+    name = 'openpgp-keylist'
+    namespace = util.NS_OPENPGP_PUBLIC_KEYS
+    pep_class = PGPKeylistData
+    store_publish = True
+    _log = log
+
+    def __init__(self, con):
+        AbstractPEPModule.__init__(self, con, con.name)
+
+        self.handlers = []
+
+    def _extract_info(self, item):
+        keylist_tag = item.getTag('public-keys-list',
+                                  namespace=util.NS_OPENPGP)
+        if keylist_tag is None:
+            raise StanzaMalformed('No public-keys-list node')
+
+        metadata = keylist_tag.getTags('pubkey-metadata')
+        if not metadata:
+            raise StanzaMalformed('No metadata found')
+
+        keylist = []
+        for data in metadata:
+            attrs = data.getAttrs()
+
+            if not attrs or 'v4-fingerprint' not in attrs:
+                raise StanzaMalformed('No fingerprint in metadata')
+
+            date = attrs.get('date', None)
+            if date is None:
+                raise StanzaMalformed('No date in metadata')
+            else:
+                timestamp = parse_datetime(date, epoch=True)
+                if timestamp is None:
+                    raise StanzaMalformed('Invalid date timestamp: %s', date)
+
+            keylist.append(Key(attrs['v4-fingerprint'], timestamp))
+        return keylist
+
+    def _notification_received(self, jid, keylist):
+        con = app.connections[self._account]
+        con.get_module('OpenPGP').key_list_received(keylist.data,
+                                                    jid.getStripped())
+
+    def _build_node(self, keylist):
+        keylist_node = nbxmpp.Node('public-keys-list',
+                                   {'xmlns': util.NS_OPENPGP})
+        if keylist is None:
+            return keylist_node
+        for key in keylist:
+            attrs = {'v4-fingerprint': key.fingerprint}
+            if key.date is not None:
+                date = time.strftime(
+                    '%Y-%m-%dT%H:%M:%SZ', time.gmtime(key.date))
+                attrs['date'] = date
+            keylist_node.addChild('pubkey-metadata', attrs=attrs)
+        return keylist_node
+
+
+def get_instance(*args, **kwargs):
+    return PGPKeylist(*args, **kwargs), 'PGPKeylist'