summary refs log tree commit diff
path: root/synapse/config/emailconfig.py
blob: 19925006ccc1554513bcfba0189216319c04068a (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
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#

# This file can't be called email.py because if it is, we cannot:
import email.utils
import logging
import os
from typing import Any

import attr

from synapse.types import JsonDict

from ._base import Config, ConfigError

logger = logging.getLogger(__name__)

MISSING_PASSWORD_RESET_CONFIG_ERROR = """\
Password reset emails are enabled on this homeserver due to a partial
'email' block. However, the following required keys are missing:
    %s
"""

DEFAULT_SUBJECTS = {
    "message_from_person_in_room": "[%(app)s] You have a message on %(app)s from %(person)s in the %(room)s room...",
    "message_from_person": "[%(app)s] You have a message on %(app)s from %(person)s...",
    "messages_from_person": "[%(app)s] You have messages on %(app)s from %(person)s...",
    "messages_in_room": "[%(app)s] You have messages on %(app)s in the %(room)s room...",
    "messages_in_room_and_others": "[%(app)s] You have messages on %(app)s in the %(room)s room and others...",
    "messages_from_person_and_others": "[%(app)s] You have messages on %(app)s from %(person)s and others...",
    "invite_from_person": "[%(app)s] %(person)s has invited you to chat on %(app)s...",
    "invite_from_person_to_room": "[%(app)s] %(person)s has invited you to join the %(room)s room on %(app)s...",
    "invite_from_person_to_space": "[%(app)s] %(person)s has invited you to join the %(space)s space on %(app)s...",
    "password_reset": "[%(server_name)s] Password reset",
    "email_validation": "[%(server_name)s] Validate your email",
}

LEGACY_TEMPLATE_DIR_WARNING = """
This server's configuration file is using the deprecated 'template_dir' setting in the
'email' section. Support for this setting has been deprecated and will be removed in a
future version of Synapse. Server admins should instead use the new
'custom_template_directory' setting documented here:
https://matrix-org.github.io/synapse/latest/templates.html
---------------------------------------------------------------------------------------"""


@attr.s(slots=True, frozen=True, auto_attribs=True)
class EmailSubjectConfig:
    message_from_person_in_room: str
    message_from_person: str
    messages_from_person: str
    messages_in_room: str
    messages_in_room_and_others: str
    messages_from_person_and_others: str
    invite_from_person: str
    invite_from_person_to_room: str
    invite_from_person_to_space: str
    password_reset: str
    email_validation: str


class EmailConfig(Config):
    section = "email"

    def read_config(self, config: JsonDict, **kwargs: Any) -> None:
        # TODO: We should separate better the email configuration from the notification
        # and account validity config.

        self.email_enable_notifs = False

        email_config = config.get("email")
        if email_config is None:
            email_config = {}

        self.force_tls = email_config.get("force_tls", False)
        self.email_smtp_host = email_config.get("smtp_host", "localhost")
        self.email_smtp_port = email_config.get(
            "smtp_port", 465 if self.force_tls else 25
        )
        self.email_smtp_user = email_config.get("smtp_user", None)
        self.email_smtp_pass = email_config.get("smtp_pass", None)
        self.require_transport_security = email_config.get(
            "require_transport_security", False
        )
        self.enable_smtp_tls = email_config.get("enable_tls", True)
        if self.force_tls and not self.enable_smtp_tls:
            raise ConfigError("email.force_tls requires email.enable_tls to be true")
        if self.require_transport_security and not self.enable_smtp_tls:
            raise ConfigError(
                "email.require_transport_security requires email.enable_tls to be true"
            )

        if "app_name" in email_config:
            self.email_app_name = email_config["app_name"]
        else:
            self.email_app_name = "Matrix"

        # TODO: Rename notif_from to something more generic, or have a separate
        # from for password resets, message notifications, etc?
        # Currently the email section is a bit bogged down with settings for
        # multiple functions. Would be good to split it out into separate
        # sections and only put the common ones under email:
        self.email_notif_from = email_config.get("notif_from", None)
        if self.email_notif_from is not None:
            # make sure it's valid
            parsed = email.utils.parseaddr(self.email_notif_from)
            if parsed[1] == "":
                raise RuntimeError("Invalid notif_from address")

        # A user-configurable template directory
        template_dir = email_config.get("template_dir")
        if template_dir is not None:
            logger.warning(LEGACY_TEMPLATE_DIR_WARNING)

        if isinstance(template_dir, str):
            # We need an absolute path, because we change directory after starting (and
            # we don't yet know what auxiliary templates like mail.css we will need).
            template_dir = os.path.abspath(template_dir)
        elif template_dir is not None:
            # If template_dir is something other than a str or None, warn the user
            raise ConfigError("Config option email.template_dir must be type str")

        self.email_enable_notifs = email_config.get("enable_notifs", False)

        if config.get("trust_identity_server_for_password_resets"):
            raise ConfigError(
                'The config option "trust_identity_server_for_password_resets" '
                "is no longer supported. Please remove it from the config file."
            )

        # If we have email config settings, assume that we can verify ownership of
        # email addresses.
        self.can_verify_email = email_config != {}

        # Get lifetime of a validation token in milliseconds
        self.email_validation_token_lifetime = self.parse_duration(
            email_config.get("validation_token_lifetime", "1h")
        )

        if self.can_verify_email:
            missing = []
            if not self.email_notif_from:
                missing.append("email.notif_from")

            if missing:
                raise ConfigError(
                    MISSING_PASSWORD_RESET_CONFIG_ERROR % (", ".join(missing),)
                )

            # These email templates have placeholders in them, and thus must be
            # parsed using a templating engine during a request
            password_reset_template_html = email_config.get(
                "password_reset_template_html", "password_reset.html"
            )
            password_reset_template_text = email_config.get(
                "password_reset_template_text", "password_reset.txt"
            )
            registration_template_html = email_config.get(
                "registration_template_html", "registration.html"
            )
            registration_template_text = email_config.get(
                "registration_template_text", "registration.txt"
            )
            add_threepid_template_html = email_config.get(
                "add_threepid_template_html", "add_threepid.html"
            )
            add_threepid_template_text = email_config.get(
                "add_threepid_template_text", "add_threepid.txt"
            )

            password_reset_template_failure_html = email_config.get(
                "password_reset_template_failure_html", "password_reset_failure.html"
            )
            registration_template_failure_html = email_config.get(
                "registration_template_failure_html", "registration_failure.html"
            )
            add_threepid_template_failure_html = email_config.get(
                "add_threepid_template_failure_html", "add_threepid_failure.html"
            )

            # These templates do not support any placeholder variables, so we
            # will read them from disk once during setup
            password_reset_template_success_html = email_config.get(
                "password_reset_template_success_html", "password_reset_success.html"
            )
            registration_template_success_html = email_config.get(
                "registration_template_success_html", "registration_success.html"
            )
            add_threepid_template_success_html = email_config.get(
                "add_threepid_template_success_html", "add_threepid_success.html"
            )

            # Read all templates from disk
            (
                self.email_password_reset_template_html,
                self.email_password_reset_template_text,
                self.email_registration_template_html,
                self.email_registration_template_text,
                self.email_add_threepid_template_html,
                self.email_add_threepid_template_text,
                self.email_password_reset_template_confirmation_html,
                self.email_password_reset_template_failure_html,
                self.email_registration_template_failure_html,
                self.email_add_threepid_template_failure_html,
                password_reset_template_success_html_template,
                registration_template_success_html_template,
                add_threepid_template_success_html_template,
            ) = self.read_templates(
                [
                    password_reset_template_html,
                    password_reset_template_text,
                    registration_template_html,
                    registration_template_text,
                    add_threepid_template_html,
                    add_threepid_template_text,
                    "password_reset_confirmation.html",
                    password_reset_template_failure_html,
                    registration_template_failure_html,
                    add_threepid_template_failure_html,
                    password_reset_template_success_html,
                    registration_template_success_html,
                    add_threepid_template_success_html,
                ],
                (
                    td
                    for td in (
                        self.root.server.custom_template_directory,
                        template_dir,
                    )
                    if td
                ),  # Filter out template_dir if not provided
            )

            # Render templates that do not contain any placeholders
            self.email_password_reset_template_success_html_content = (
                password_reset_template_success_html_template.render()
            )
            self.email_registration_template_success_html_content = (
                registration_template_success_html_template.render()
            )
            self.email_add_threepid_template_success_html_content = (
                add_threepid_template_success_html_template.render()
            )

        if self.email_enable_notifs:
            missing = []
            if not self.email_notif_from:
                missing.append("email.notif_from")

            if missing:
                raise ConfigError(
                    "email.enable_notifs is True but required keys are missing: %s"
                    % (", ".join(missing),)
                )

            notif_template_html = email_config.get(
                "notif_template_html", "notif_mail.html"
            )
            notif_template_text = email_config.get(
                "notif_template_text", "notif_mail.txt"
            )

            (
                self.email_notif_template_html,
                self.email_notif_template_text,
            ) = self.read_templates(
                [notif_template_html, notif_template_text],
                (
                    td
                    for td in (
                        self.root.server.custom_template_directory,
                        template_dir,
                    )
                    if td
                ),  # Filter out template_dir if not provided
            )

            self.email_notif_for_new_users = email_config.get(
                "notif_for_new_users", True
            )
            self.email_riot_base_url = email_config.get(
                "client_base_url", email_config.get("riot_base_url", None)
            )

        if self.root.account_validity.account_validity_renew_by_email_enabled:
            expiry_template_html = email_config.get(
                "expiry_template_html", "notice_expiry.html"
            )
            expiry_template_text = email_config.get(
                "expiry_template_text", "notice_expiry.txt"
            )

            (
                self.account_validity_template_html,
                self.account_validity_template_text,
            ) = self.read_templates(
                [expiry_template_html, expiry_template_text],
                (
                    td
                    for td in (
                        self.root.server.custom_template_directory,
                        template_dir,
                    )
                    if td
                ),  # Filter out template_dir if not provided
            )

        subjects_config = email_config.get("subjects", {})
        subjects = {}

        for key, default in DEFAULT_SUBJECTS.items():
            subjects[key] = subjects_config.get(key, default)

        self.email_subjects = EmailSubjectConfig(**subjects)

        # The invite client location should be a HTTP(S) URL or None.
        self.invite_client_location = email_config.get("invite_client_location") or None
        if self.invite_client_location:
            if not isinstance(self.invite_client_location, str):
                raise ConfigError(
                    "Config option email.invite_client_location must be type str"
                )
            if not (
                self.invite_client_location.startswith("http://")
                or self.invite_client_location.startswith("https://")
            ):
                raise ConfigError(
                    "Config option email.invite_client_location must be a http or https URL",
                    path=("email", "invite_client_location"),
                )