Add restrictions by default to open registration in Synapse (#12091)

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Shay 2022-03-25 10:11:01 -07:00 committed by GitHub
parent 7ca8ee67a5
commit 3c41d87b67
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7 changed files with 67 additions and 4 deletions

1
changelog.d/12091.misc Normal file
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@ -0,0 +1 @@
Refuse to start if registration is enabled without email, captcha, or token-based verification unless new config flag `enable_registration_without_verification` is set.

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@ -38,6 +38,7 @@ for port in 8080 8081 8082; do
printf '\n\n# Customisation made by demo/start.sh\n\n'
echo "public_baseurl: http://localhost:$port/"
echo 'enable_registration: true'
echo 'enable_registration_without_verification: true'
echo ''
# Warning, this heredoc depends on the interaction of tabs and spaces.

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@ -1218,10 +1218,18 @@ oembed:
# Registration can be rate-limited using the parameters in the "Ratelimiting"
# section of this file.
# Enable registration for new users.
# Enable registration for new users. Defaults to 'false'. It is highly recommended that if you enable registration,
# you use either captcha, email, or token-based verification to verify that new users are not bots. In order to enable registration
# without any verification, you must also set `enable_registration_without_verification`, found below.
#
#enable_registration: false
# Enable registration without email or captcha verification. Note: this option is *not* recommended,
# as registration without verification is a known vector for spam and abuse. Defaults to false. Has no effect
# unless `enable_registration` is also enabled.
#
#enable_registration_without_verification: true
# Time that a user's session remains valid for, after they log in.
#
# Note that this is not currently compatible with guest logins.

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@ -108,6 +108,12 @@ for more information and instructions on how to fix a database with incorrect va
# Upgrading to v1.55.0
## Open registration without verification is now disabled by default
Synapse will refuse to start if registration is enabled without email, captcha, or token-based verification unless the new config
flag `enable_registration_without_verification` is set to "true".
## `synctl` script has been moved
The `synctl` script

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@ -351,6 +351,23 @@ def setup(config_options: List[str]) -> SynapseHomeServer:
if config.server.gc_seconds:
synapse.metrics.MIN_TIME_BETWEEN_GCS = config.server.gc_seconds
if (
config.registration.enable_registration
and not config.registration.enable_registration_without_verification
):
if (
not config.captcha.enable_registration_captcha
and not config.registration.registrations_require_3pid
and not config.registration.registration_requires_token
):
raise ConfigError(
"You have enabled open registration without any verification. This is a known vector for "
"spam and abuse. If you would like to allow public registration, please consider adding email, "
"captcha, or token-based verification. Otherwise this check can be removed by setting the "
"`enable_registration_without_verification` config option to `true`."
)
hs = SynapseHomeServer(
config.server.server_name,
config=config,

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@ -33,6 +33,10 @@ class RegistrationConfig(Config):
str(config["disable_registration"])
)
self.enable_registration_without_verification = strtobool(
str(config.get("enable_registration_without_verification", False))
)
self.registrations_require_3pid = config.get("registrations_require_3pid", [])
self.allowed_local_3pids = config.get("allowed_local_3pids", [])
self.enable_3pid_lookup = config.get("enable_3pid_lookup", True)
@ -207,10 +211,18 @@ class RegistrationConfig(Config):
# Registration can be rate-limited using the parameters in the "Ratelimiting"
# section of this file.
# Enable registration for new users.
# Enable registration for new users. Defaults to 'false'. It is highly recommended that if you enable registration,
# you use either captcha, email, or token-based verification to verify that new users are not bots. In order to enable registration
# without any verification, you must also set `enable_registration_without_verification`, found below.
#
#enable_registration: false
# Enable registration without email or captcha verification. Note: this option is *not* recommended,
# as registration without verification is a known vector for spam and abuse. Defaults to false. Has no effect
# unless `enable_registration` is also enabled.
#
#enable_registration_without_verification: true
# Time that a user's session remains valid for, after they log in.
#
# Note that this is not currently compatible with guest logins.

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@ -11,14 +11,16 @@
# 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 synapse.app.homeserver
from synapse.config import ConfigError
from synapse.config.homeserver import HomeServerConfig
from tests.unittest import TestCase
from tests.config.utils import ConfigFileTestCase
from tests.utils import default_config
class RegistrationConfigTestCase(TestCase):
class RegistrationConfigTestCase(ConfigFileTestCase):
def test_session_lifetime_must_not_be_exceeded_by_smaller_lifetimes(self):
"""
session_lifetime should logically be larger than, or at least as large as,
@ -76,3 +78,19 @@ class RegistrationConfigTestCase(TestCase):
HomeServerConfig().parse_config_dict(
{"session_lifetime": "31m", "refresh_token_lifetime": "31m", **config_dict}
)
def test_refuse_to_start_if_open_registration_and_no_verification(self):
self.generate_config()
self.add_lines_to_config(
[
" ",
"enable_registration: true",
"registrations_require_3pid: []",
"enable_registration_captcha: false",
"registration_requires_token: false",
]
)
# Test that allowing open registration without verification raises an error
with self.assertRaises(ConfigError):
synapse.app.homeserver.setup(["-c", self.config_file])