264 lines
10 KiB
Python
264 lines
10 KiB
Python
# Copyright 2014-2016 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
|
|
import os
|
|
from typing import Any, List, Optional, Pattern
|
|
|
|
from matrix_common.regex import glob_to_regex
|
|
|
|
from OpenSSL import SSL, crypto
|
|
from twisted.internet._sslverify import Certificate, trustRootFromCertificates
|
|
|
|
from synapse.config._base import Config, ConfigError
|
|
from synapse.types import JsonDict
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class TlsConfig(Config):
|
|
section = "tls"
|
|
|
|
def read_config(self, config: JsonDict, **kwargs: Any) -> None:
|
|
|
|
self.tls_certificate_file = self.abspath(config.get("tls_certificate_path"))
|
|
self.tls_private_key_file = self.abspath(config.get("tls_private_key_path"))
|
|
|
|
if self.root.server.has_tls_listener():
|
|
if not self.tls_certificate_file:
|
|
raise ConfigError(
|
|
"tls_certificate_path must be specified if TLS-enabled listeners are "
|
|
"configured."
|
|
)
|
|
if not self.tls_private_key_file:
|
|
raise ConfigError(
|
|
"tls_private_key_path must be specified if TLS-enabled listeners are "
|
|
"configured."
|
|
)
|
|
|
|
# Whether to verify certificates on outbound federation traffic
|
|
self.federation_verify_certificates = config.get(
|
|
"federation_verify_certificates", True
|
|
)
|
|
|
|
# Minimum TLS version to use for outbound federation traffic
|
|
self.federation_client_minimum_tls_version = str(
|
|
config.get("federation_client_minimum_tls_version", 1)
|
|
)
|
|
|
|
if self.federation_client_minimum_tls_version not in ["1", "1.1", "1.2", "1.3"]:
|
|
raise ConfigError(
|
|
"federation_client_minimum_tls_version must be one of: 1, 1.1, 1.2, 1.3"
|
|
)
|
|
|
|
# Prevent people shooting themselves in the foot here by setting it to
|
|
# the biggest number blindly
|
|
if self.federation_client_minimum_tls_version == "1.3":
|
|
if getattr(SSL, "OP_NO_TLSv1_3", None) is None:
|
|
raise ConfigError(
|
|
"federation_client_minimum_tls_version cannot be 1.3, "
|
|
"your OpenSSL does not support it"
|
|
)
|
|
|
|
# Whitelist of domains to not verify certificates for
|
|
fed_whitelist_entries = config.get(
|
|
"federation_certificate_verification_whitelist", []
|
|
)
|
|
if fed_whitelist_entries is None:
|
|
fed_whitelist_entries = []
|
|
|
|
# Support globs (*) in whitelist values
|
|
self.federation_certificate_verification_whitelist: List[Pattern] = []
|
|
for entry in fed_whitelist_entries:
|
|
try:
|
|
entry_regex = glob_to_regex(entry.encode("ascii").decode("ascii"))
|
|
except UnicodeEncodeError:
|
|
raise ConfigError(
|
|
"IDNA domain names are not allowed in the "
|
|
"federation_certificate_verification_whitelist: %s" % (entry,)
|
|
)
|
|
|
|
# Convert globs to regex
|
|
self.federation_certificate_verification_whitelist.append(entry_regex)
|
|
|
|
# List of custom certificate authorities for federation traffic validation
|
|
custom_ca_list = config.get("federation_custom_ca_list", None)
|
|
|
|
# Read in and parse custom CA certificates
|
|
self.federation_ca_trust_root = None
|
|
if custom_ca_list is not None:
|
|
if len(custom_ca_list) == 0:
|
|
# A trustroot cannot be generated without any CA certificates.
|
|
# Raise an error if this option has been specified without any
|
|
# corresponding certificates.
|
|
raise ConfigError(
|
|
"federation_custom_ca_list specified without "
|
|
"any certificate files"
|
|
)
|
|
|
|
certs = []
|
|
for ca_file in custom_ca_list:
|
|
logger.debug("Reading custom CA certificate file: %s", ca_file)
|
|
content = self.read_file(ca_file, "federation_custom_ca_list")
|
|
|
|
# Parse the CA certificates
|
|
try:
|
|
cert_base = Certificate.loadPEM(content)
|
|
certs.append(cert_base)
|
|
except Exception as e:
|
|
raise ConfigError(
|
|
"Error parsing custom CA certificate file %s: %s" % (ca_file, e)
|
|
)
|
|
|
|
self.federation_ca_trust_root = trustRootFromCertificates(certs)
|
|
|
|
# This config option applies to non-federation HTTP clients
|
|
# (e.g. for talking to recaptcha, identity servers, and such)
|
|
# It should never be used in production, and is intended for
|
|
# use only when running tests.
|
|
self.use_insecure_ssl_client_just_for_testing_do_not_use = config.get(
|
|
"use_insecure_ssl_client_just_for_testing_do_not_use"
|
|
)
|
|
|
|
self.tls_certificate: Optional[crypto.X509] = None
|
|
self.tls_private_key: Optional[crypto.PKey] = None
|
|
|
|
def read_certificate_from_disk(self) -> None:
|
|
"""
|
|
Read the certificates and private key from disk.
|
|
"""
|
|
self.tls_private_key = self.read_tls_private_key()
|
|
self.tls_certificate = self.read_tls_certificate()
|
|
|
|
def generate_config_section(
|
|
self,
|
|
config_dir_path: str,
|
|
data_dir_path: str,
|
|
server_name: str,
|
|
tls_certificate_path: Optional[str],
|
|
tls_private_key_path: Optional[str],
|
|
**kwargs: Any,
|
|
) -> str:
|
|
"""If the TLS paths are not specified the default will be certs in the
|
|
config directory"""
|
|
|
|
base_key_name = os.path.join(config_dir_path, server_name)
|
|
|
|
if bool(tls_certificate_path) != bool(tls_private_key_path):
|
|
raise ConfigError(
|
|
"Please specify both a cert path and a key path or neither."
|
|
)
|
|
|
|
tls_enabled = "" if tls_certificate_path and tls_private_key_path else "#"
|
|
|
|
if not tls_certificate_path:
|
|
tls_certificate_path = base_key_name + ".tls.crt"
|
|
if not tls_private_key_path:
|
|
tls_private_key_path = base_key_name + ".tls.key"
|
|
|
|
# flake8 doesn't recognise that variables are used in the below string
|
|
_ = tls_enabled
|
|
|
|
return (
|
|
"""\
|
|
## TLS ##
|
|
|
|
# PEM-encoded X509 certificate for TLS.
|
|
# This certificate, as of Synapse 1.0, will need to be a valid and verifiable
|
|
# certificate, signed by a recognised Certificate Authority.
|
|
#
|
|
# Be sure to use a `.pem` file that includes the full certificate chain including
|
|
# any intermediate certificates (for instance, if using certbot, use
|
|
# `fullchain.pem` as your certificate, not `cert.pem`).
|
|
#
|
|
%(tls_enabled)stls_certificate_path: "%(tls_certificate_path)s"
|
|
|
|
# PEM-encoded private key for TLS
|
|
#
|
|
%(tls_enabled)stls_private_key_path: "%(tls_private_key_path)s"
|
|
|
|
# Whether to verify TLS server certificates for outbound federation requests.
|
|
#
|
|
# Defaults to `true`. To disable certificate verification, uncomment the
|
|
# following line.
|
|
#
|
|
#federation_verify_certificates: false
|
|
|
|
# The minimum TLS version that will be used for outbound federation requests.
|
|
#
|
|
# Defaults to `1`. Configurable to `1`, `1.1`, `1.2`, or `1.3`. Note
|
|
# that setting this value higher than `1.2` will prevent federation to most
|
|
# of the public Matrix network: only configure it to `1.3` if you have an
|
|
# entirely private federation setup and you can ensure TLS 1.3 support.
|
|
#
|
|
#federation_client_minimum_tls_version: 1.2
|
|
|
|
# Skip federation certificate verification on the following whitelist
|
|
# of domains.
|
|
#
|
|
# This setting should only be used in very specific cases, such as
|
|
# federation over Tor hidden services and similar. For private networks
|
|
# of homeservers, you likely want to use a private CA instead.
|
|
#
|
|
# Only effective if federation_verify_certicates is `true`.
|
|
#
|
|
#federation_certificate_verification_whitelist:
|
|
# - lon.example.com
|
|
# - "*.domain.com"
|
|
# - "*.onion"
|
|
|
|
# List of custom certificate authorities for federation traffic.
|
|
#
|
|
# This setting should only normally be used within a private network of
|
|
# homeservers.
|
|
#
|
|
# Note that this list will replace those that are provided by your
|
|
# operating environment. Certificates must be in PEM format.
|
|
#
|
|
#federation_custom_ca_list:
|
|
# - myCA1.pem
|
|
# - myCA2.pem
|
|
# - myCA3.pem
|
|
"""
|
|
# Lowercase the string representation of boolean values
|
|
% {
|
|
x[0]: str(x[1]).lower() if isinstance(x[1], bool) else x[1]
|
|
for x in locals().items()
|
|
}
|
|
)
|
|
|
|
def read_tls_certificate(self) -> crypto.X509:
|
|
"""Reads the TLS certificate from the configured file, and returns it
|
|
|
|
Returns:
|
|
The certificate
|
|
"""
|
|
cert_path = self.tls_certificate_file
|
|
logger.info("Loading TLS certificate from %s", cert_path)
|
|
cert_pem = self.read_file(cert_path, "tls_certificate_path")
|
|
cert = crypto.load_certificate(crypto.FILETYPE_PEM, cert_pem.encode())
|
|
|
|
return cert
|
|
|
|
def read_tls_private_key(self) -> crypto.PKey:
|
|
"""Reads the TLS private key from the configured file, and returns it
|
|
|
|
Returns:
|
|
The private key
|
|
"""
|
|
private_key_path = self.tls_private_key_file
|
|
logger.info("Loading TLS key from %s", private_key_path)
|
|
private_key_pem = self.read_file(private_key_path, "tls_private_key_path")
|
|
return crypto.load_privatekey(crypto.FILETYPE_PEM, private_key_pem)
|