summaryrefslogtreecommitdiff
path: root/src/leap/bitmask/keymanager/nicknym.py
blob: 5fe99925251e964abf58d0e3f0c135cb1636154d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
# -*- coding: utf-8 -*-
# nicknym.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/>.

import json
import sys
import logging
import urllib

from twisted.internet import defer
from twisted.web import client
from twisted.web._responses import NOT_FOUND

from leap.bitmask.keymanager.errors import KeyNotFound
from leap.common.check import leap_assert
from leap.common.http import HTTPClient
from leap.common.decorators import memoized_method


logger = logging.getLogger(__name__)


class Nicknym(object):
    """
    Responsible for communication to the nicknym server.
    """

    PUBKEY_KEY = "user[public_key]"

    def __init__(self, nickserver_uri, ca_cert_path, token):
        self._nickserver_uri = nickserver_uri
        self._async_client_pinned = HTTPClient(ca_cert_path)
        self._token = token

    @defer.inlineCallbacks
    def put_key(self, uid, key_data, api_uri, api_version):
        """
        Send a PUT request to C{uri} containing C{data}.

        The request will be sent using the configured CA certificate path to
        verify the server certificate and the configured session id for
        authentication.

        :param uid: The URI of the request.
        :type uid: str
        :param key_data: The body of the request.
        :type key_data: dict, str or file

        :return: A deferred that will be fired when PUT request finishes
        :rtype: Deferred
        """
        data = {
            self.PUBKEY_KEY: key_data
        }

        uri = "%s/%s/users/%s.json" % (
            api_uri,
            api_version,
            uid)

        leap_assert(
            self._token is not None,
            'We need a token to interact with webapp!')
        if type(data) == dict:
            data = urllib.urlencode(data)
        headers = {'Authorization': [str('Token token=%s' % self._token)]}
        headers['Content-Type'] = ['application/x-www-form-urlencoded']
        try:
            res = yield self._async_client_pinned.request(str(uri), 'PUT',
                                                          body=str(data),
                                                          headers=headers)
        except Exception as e:
            logger.warning("Error uploading key: %r" % (e,))
            raise e
        if 'error' in res:
            # FIXME: That's a workaround for 500,
            # we need to implement a readBody to assert response code
            logger.warning("Error uploading key: %r" % (res,))
            raise Exception(res)

    @defer.inlineCallbacks
    def _get_key_from_nicknym(self, uri):
        """
        Send a GET request to C{uri} containing C{data}.

        :param uri: The URI of the request.
        :type uri: str

        :return: A deferred that will be fired with GET content as json (dict)
        :rtype: Deferred
        """
        try:
            content = yield self._fetch_and_handle_404_from_nicknym(uri)
            json_content = json.loads(content)

        except KeyNotFound:
            raise
        except IOError as e:
            logger.warning("HTTP error retrieving key: %r" % (e,))
            logger.warning("%s" % (content,))
            raise KeyNotFound(e.message), None, sys.exc_info()[2]
        except ValueError as v:
            logger.warning("Invalid JSON data from key: %s" % (uri,))
            raise KeyNotFound(v.message + ' - ' + uri), None, sys.exc_info()[2]

        except Exception as e:
            logger.warning("Error retrieving key: %r" % (e,))
            raise KeyNotFound(e.message), None, sys.exc_info()[2]
        # Responses are now text/plain, although it's json anyway, but
        # this will fail when it shouldn't
        # leap_assert(
        #     res.headers['content-type'].startswith('application/json'),
        #     'Content-type is not JSON.')
        defer.returnValue(json_content)

    def _fetch_and_handle_404_from_nicknym(self, uri):
        """
        Send a GET request to C{uri} containing C{data}.

        :param uri: The URI of the request.
        :type uri: str

        :return: A deferred that will be fired with GET content as json (dict)
        :rtype: Deferred
        """

        def check_404(response):
            if response.code == NOT_FOUND:
                message = ' %s: Key not found. Request: %s' \
                          % (response.code, uri)
                logger.warning(message)
                raise KeyNotFound(message), None, sys.exc_info()[2]
            return response

        d = self._async_client_pinned.request(str(uri), 'GET',
                                              callback=check_404)
        d.addCallback(client.readBody)
        return d

    @memoized_method(invalidation=300)
    def fetch_key_with_address(self, address):
        """
        Fetch keys bound to address from nickserver.

        :param address: The address bound to the keys.
        :type address: str

        :return: A Deferred which fires when the key is in the storage,
                 or which fails with KeyNotFound if the key was not found on
                 nickserver.
        :rtype: Deferred

        """
        return self._get_key_from_nicknym(self._nickserver_uri +
                                          '?address=' + address)

    @memoized_method(invalidation=300)
    def fetch_key_with_fingerprint(self, fingerprint):
        """
        Fetch keys bound to fingerprint from nickserver.

        :param fingerprint: The fingerprint bound to the keys.
        :type fingerprint: str

        :return: A Deferred which fires when the key is in the storage,
                 or which fails with KeyNotFound if the key was not found on
                 nickserver.
        :rtype: Deferred

        """
        return self._get_key_from_nicknym(self._nickserver_uri +
                                          '?fingerprint=' + fingerprint)