summary refs log tree commit diff
path: root/synapse/rest/client/v2_alpha/keys.py
blob: 4cbfbf5631b7c26e5f57c531a16fac9c4f9966b2 (plain) (blame)
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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
# -*- coding: utf-8 -*-
# Copyright 2015, 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import logging

from twisted.internet import defer

from synapse.api.errors import SynapseError
from synapse.http.servlet import (
    RestServlet,
    parse_integer,
    parse_json_object_from_request,
    parse_string,
)
from synapse.types import StreamToken

from ._base import client_patterns

logger = logging.getLogger(__name__)


class KeyUploadServlet(RestServlet):
    """
    POST /keys/upload HTTP/1.1
    Content-Type: application/json

    {
      "device_keys": {
        "user_id": "<user_id>",
        "device_id": "<device_id>",
        "valid_until_ts": <millisecond_timestamp>,
        "algorithms": [
          "m.olm.curve25519-aes-sha256",
        ]
        "keys": {
          "<algorithm>:<device_id>": "<key_base64>",
        },
        "signatures:" {
          "<user_id>" {
            "<algorithm>:<device_id>": "<signature_base64>"
      } } },
      "one_time_keys": {
        "<algorithm>:<key_id>": "<key_base64>"
      },
    }
    """
    PATTERNS = client_patterns("/keys/upload(/(?P<device_id>[^/]+))?$")

    def __init__(self, hs):
        """
        Args:
            hs (synapse.server.HomeServer): server
        """
        super(KeyUploadServlet, self).__init__()
        self.auth = hs.get_auth()
        self.e2e_keys_handler = hs.get_e2e_keys_handler()

    @defer.inlineCallbacks
    def on_POST(self, request, device_id):
        requester = yield self.auth.get_user_by_req(request, allow_guest=True)
        user_id = requester.user.to_string()
        body = parse_json_object_from_request(request)

        if device_id is not None:
            # passing the device_id here is deprecated; however, we allow it
            # for now for compatibility with older clients.
            if (requester.device_id is not None and
                    device_id != requester.device_id):
                logger.warning("Client uploading keys for a different device "
                               "(logged in as %s, uploading for %s)",
                               requester.device_id, device_id)
        else:
            device_id = requester.device_id

        if device_id is None:
            raise SynapseError(
                400,
                "To upload keys, you must pass device_id when authenticating"
            )

        result = yield self.e2e_keys_handler.upload_keys_for_user(
            user_id, device_id, body
        )
        defer.returnValue((200, result))


class KeyQueryServlet(RestServlet):
    """
    POST /keys/query HTTP/1.1
    Content-Type: application/json
    {
      "device_keys": {
        "<user_id>": ["<device_id>"]
    } }

    HTTP/1.1 200 OK
    {
      "device_keys": {
        "<user_id>": {
          "<device_id>": {
            "user_id": "<user_id>", // Duplicated to be signed
            "device_id": "<device_id>", // Duplicated to be signed
            "valid_until_ts": <millisecond_timestamp>,
            "algorithms": [ // List of supported algorithms
              "m.olm.curve25519-aes-sha256",
            ],
            "keys": { // Must include a ed25519 signing key
              "<algorithm>:<key_id>": "<key_base64>",
            },
            "signatures:" {
              // Must be signed with device's ed25519 key
              "<user_id>/<device_id>": {
                "<algorithm>:<key_id>": "<signature_base64>"
              }
              // Must be signed by this server.
              "<server_name>": {
                "<algorithm>:<key_id>": "<signature_base64>"
    } } } } } }
    """

    PATTERNS = client_patterns("/keys/query$")

    def __init__(self, hs):
        """
        Args:
            hs (synapse.server.HomeServer):
        """
        super(KeyQueryServlet, self).__init__()
        self.auth = hs.get_auth()
        self.e2e_keys_handler = hs.get_e2e_keys_handler()

    @defer.inlineCallbacks
    def on_POST(self, request):
        yield self.auth.get_user_by_req(request, allow_guest=True)
        timeout = parse_integer(request, "timeout", 10 * 1000)
        body = parse_json_object_from_request(request)
        result = yield self.e2e_keys_handler.query_devices(body, timeout)
        defer.returnValue((200, result))


class KeyChangesServlet(RestServlet):
    """Returns the list of changes of keys between two stream tokens (may return
    spurious extra results, since we currently ignore the `to` param).

        GET /keys/changes?from=...&to=...

        200 OK
        { "changed": ["@foo:example.com"] }
    """
    PATTERNS = client_patterns("/keys/changes$")

    def __init__(self, hs):
        """
        Args:
            hs (synapse.server.HomeServer):
        """
        super(KeyChangesServlet, self).__init__()
        self.auth = hs.get_auth()
        self.device_handler = hs.get_device_handler()

    @defer.inlineCallbacks
    def on_GET(self, request):
        requester = yield self.auth.get_user_by_req(request, allow_guest=True)

        from_token_string = parse_string(request, "from")

        # We want to enforce they do pass us one, but we ignore it and return
        # changes after the "to" as well as before.
        parse_string(request, "to")

        from_token = StreamToken.from_string(from_token_string)

        user_id = requester.user.to_string()

        results = yield self.device_handler.get_user_ids_changed(
            user_id, from_token,
        )

        defer.returnValue((200, results))


class OneTimeKeyServlet(RestServlet):
    """
    POST /keys/claim HTTP/1.1
    {
      "one_time_keys": {
        "<user_id>": {
          "<device_id>": "<algorithm>"
    } } }

    HTTP/1.1 200 OK
    {
      "one_time_keys": {
        "<user_id>": {
          "<device_id>": {
            "<algorithm>:<key_id>": "<key_base64>"
    } } } }

    """
    PATTERNS = client_patterns("/keys/claim$")

    def __init__(self, hs):
        super(OneTimeKeyServlet, self).__init__()
        self.auth = hs.get_auth()
        self.e2e_keys_handler = hs.get_e2e_keys_handler()

    @defer.inlineCallbacks
    def on_POST(self, request):
        yield self.auth.get_user_by_req(request, allow_guest=True)
        timeout = parse_integer(request, "timeout", 10 * 1000)
        body = parse_json_object_from_request(request)
        result = yield self.e2e_keys_handler.claim_one_time_keys(
            body,
            timeout,
        )
        defer.returnValue((200, result))


def register_servlets(hs, http_server):
    KeyUploadServlet(hs).register(http_server)
    KeyQueryServlet(hs).register(http_server)
    KeyChangesServlet(hs).register(http_server)
    OneTimeKeyServlet(hs).register(http_server)