summary refs log tree commit diff
path: root/tests/config/test_tls.py
blob: 1be6ff563bb17f6edc3b171407153e7e0eaf468c (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
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
# -*- coding: utf-8 -*-
# Copyright 2019 New Vector Ltd
# Copyright 2019 Matrix.org Foundation C.I.C.
#
# 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 os

import idna
import yaml

from OpenSSL import SSL

from synapse.config._base import Config, RootConfig
from synapse.config.tls import ConfigError, TlsConfig
from synapse.crypto.context_factory import ClientTLSOptionsFactory

from tests.unittest import TestCase


class FakeServer(Config):
    section = "server"

    def has_tls_listener(self):
        return False


class TestConfig(RootConfig):
    config_classes = [FakeServer, TlsConfig]


class TLSConfigTests(TestCase):
    def test_warn_self_signed(self):
        """
        Synapse will give a warning when it loads a self-signed certificate.
        """
        config_dir = self.mktemp()
        os.mkdir(config_dir)
        with open(os.path.join(config_dir, "cert.pem"), "w") as f:
            f.write(
                """-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----"""
            )

        config = {
            "tls_certificate_path": os.path.join(config_dir, "cert.pem"),
            "tls_fingerprints": [],
        }

        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        t.read_certificate_from_disk(require_cert_and_key=False)

        warnings = self.flushWarnings()
        self.assertEqual(len(warnings), 1)
        self.assertEqual(
            warnings[0]["message"],
            (
                "Self-signed TLS certificates will not be accepted by "
                "Synapse 1.0. Please either provide a valid certificate, "
                "or use Synapse's ACME support to provision one."
            ),
        )

    def test_tls_client_minimum_default(self):
        """
        The default client TLS version is 1.0.
        """
        config = {}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")

        self.assertEqual(t.federation_client_minimum_tls_version, "1")

    def test_tls_client_minimum_set(self):
        """
        The default client TLS version can be set to 1.0, 1.1, and 1.2.
        """
        config = {"federation_client_minimum_tls_version": 1}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1")

        config = {"federation_client_minimum_tls_version": 1.1}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1.1")

        config = {"federation_client_minimum_tls_version": 1.2}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1.2")

        # Also test a string version
        config = {"federation_client_minimum_tls_version": "1"}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1")

        config = {"federation_client_minimum_tls_version": "1.2"}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1.2")

    def test_tls_client_minimum_1_point_3_missing(self):
        """
        If TLS 1.3 support is missing and it's configured, it will raise a
        ConfigError.
        """
        # thanks i hate it
        if hasattr(SSL, "OP_NO_TLSv1_3"):
            OP_NO_TLSv1_3 = SSL.OP_NO_TLSv1_3
            delattr(SSL, "OP_NO_TLSv1_3")
            self.addCleanup(setattr, SSL, "SSL.OP_NO_TLSv1_3", OP_NO_TLSv1_3)
            assert not hasattr(SSL, "OP_NO_TLSv1_3")

        config = {"federation_client_minimum_tls_version": 1.3}
        t = TestConfig()
        with self.assertRaises(ConfigError) as e:
            t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(
            e.exception.args[0],
            (
                "federation_client_minimum_tls_version cannot be 1.3, "
                "your OpenSSL does not support it"
            ),
        )

    def test_tls_client_minimum_1_point_3_exists(self):
        """
        If TLS 1.3 support exists and it's configured, it will be settable.
        """
        # thanks i hate it, still
        if not hasattr(SSL, "OP_NO_TLSv1_3"):
            SSL.OP_NO_TLSv1_3 = 0x00
            self.addCleanup(lambda: delattr(SSL, "OP_NO_TLSv1_3"))
            assert hasattr(SSL, "OP_NO_TLSv1_3")

        config = {"federation_client_minimum_tls_version": 1.3}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")
        self.assertEqual(t.federation_client_minimum_tls_version, "1.3")

    def test_tls_client_minimum_set_passed_through_1_2(self):
        """
        The configured TLS version is correctly configured by the ContextFactory.
        """
        config = {"federation_client_minimum_tls_version": 1.2}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")

        cf = ClientTLSOptionsFactory(t)

        # The context has had NO_TLSv1_1 and NO_TLSv1_0 set, but not NO_TLSv1_2
        self.assertNotEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1, 0)
        self.assertNotEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1_1, 0)
        self.assertEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1_2, 0)

    def test_tls_client_minimum_set_passed_through_1_0(self):
        """
        The configured TLS version is correctly configured by the ContextFactory.
        """
        config = {"federation_client_minimum_tls_version": 1}
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")

        cf = ClientTLSOptionsFactory(t)

        # The context has not had any of the NO_TLS set.
        self.assertEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1, 0)
        self.assertEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1_1, 0)
        self.assertEqual(cf._verify_ssl._options & SSL.OP_NO_TLSv1_2, 0)

    def test_acme_disabled_in_generated_config_no_acme_domain_provied(self):
        """
        Checks acme is disabled by default.
        """
        conf = TestConfig()
        conf.read_config(
            yaml.safe_load(
                TestConfig().generate_config(
                    "/config_dir_path",
                    "my_super_secure_server",
                    "/data_dir_path",
                    tls_certificate_path="/tls_cert_path",
                    tls_private_key_path="tls_private_key",
                    acme_domain=None,  # This is the acme_domain
                )
            ),
            "/config_dir_path",
        )

        self.assertFalse(conf.acme_enabled)

    def test_acme_enabled_in_generated_config_domain_provided(self):
        """
        Checks acme is enabled if the acme_domain arg is set to some string.
        """
        conf = TestConfig()
        conf.read_config(
            yaml.safe_load(
                TestConfig().generate_config(
                    "/config_dir_path",
                    "my_super_secure_server",
                    "/data_dir_path",
                    tls_certificate_path="/tls_cert_path",
                    tls_private_key_path="tls_private_key",
                    acme_domain="my_supe_secure_server",  # This is the acme_domain
                )
            ),
            "/config_dir_path",
        )

        self.assertTrue(conf.acme_enabled)

    def test_whitelist_idna_failure(self):
        """
        The federation certificate whitelist will not allow IDNA domain names.
        """
        config = {
            "federation_certificate_verification_whitelist": [
                "example.com",
                "*.ドメイン.テスト",
            ]
        }
        t = TestConfig()
        e = self.assertRaises(
            ConfigError, t.read_config, config, config_dir_path="", data_dir_path=""
        )
        self.assertIn("IDNA domain names", str(e))

    def test_whitelist_idna_result(self):
        """
        The federation certificate whitelist will match on IDNA encoded names.
        """
        config = {
            "federation_certificate_verification_whitelist": [
                "example.com",
                "*.xn--eckwd4c7c.xn--zckzah",
            ]
        }
        t = TestConfig()
        t.read_config(config, config_dir_path="", data_dir_path="")

        cf = ClientTLSOptionsFactory(t)

        # Not in the whitelist
        opts = cf.get_options(b"notexample.com")
        self.assertTrue(opts._verifier._verify_certs)

        # Caught by the wildcard
        opts = cf.get_options(idna.encode("テスト.ドメイン.テスト"))
        self.assertFalse(opts._verifier._verify_certs)