Merge pull request #4613 from matrix-org/rav/deprecate_no_tls

Infer no_tls from presence of TLS listeners
This commit is contained in:
Erik Johnston 2019-02-12 09:59:53 +00:00 committed by GitHub
commit 8a2e316413
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11 changed files with 82 additions and 44 deletions

1
changelog.d/4613.feature Normal file
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@ -0,0 +1 @@
There is no longer any need to specify `no_tls`: it is inferred from the absence of TLS listeners

1
changelog.d/4615.feature Normal file
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@ -0,0 +1 @@
There is no longer any need to specify `no_tls`: it is inferred from the absence of TLS listeners

1
changelog.d/4616.misc Normal file
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@ -0,0 +1 @@
Fail cleanly if listener config lacks a 'port'

1
changelog.d/4617.feature Normal file
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@ -0,0 +1 @@
There is no longer any need to specify `no_tls`: it is inferred from the absence of TLS listeners

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@ -213,13 +213,16 @@ def refresh_certificate(hs):
Refresh the TLS certificates that Synapse is using by re-reading them from
disk and updating the TLS context factories to use them.
"""
logging.info("Loading certificate from disk...")
hs.config.read_certificate_from_disk()
if not hs.config.has_tls_listener():
# nothing else to do here
return
hs.tls_server_context_factory = context_factory.ServerContextFactory(hs.config)
logging.info("Certificate loaded.")
if hs._listening_services:
logging.info("Updating context factories...")
logger.info("Updating context factories...")
for i in hs._listening_services:
# When you listenSSL, it doesn't make an SSL port but a TCP one with
# a TLS wrapping factory around the factory you actually want to get
@ -234,7 +237,7 @@ def refresh_certificate(hs):
False,
i.factory.wrappedFactory
)
logging.info("Context factories updated.")
logger.info("Context factories updated.")
def start(hs, listeners=None):

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@ -90,11 +90,6 @@ class SynapseHomeServer(HomeServer):
tls = listener_config.get("tls", False)
site_tag = listener_config.get("tag", port)
if tls and config.no_tls:
raise ConfigError(
"Listener on port %i has TLS enabled, but no_tls is set" % (port,),
)
resources = {}
for res in listener_config["resources"]:
for name in res["names"]:

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@ -42,7 +42,7 @@ from .voip import VoipConfig
from .workers import WorkerConfig
class HomeServerConfig(TlsConfig, ServerConfig, DatabaseConfig, LoggingConfig,
class HomeServerConfig(ServerConfig, TlsConfig, DatabaseConfig, LoggingConfig,
RatelimitConfig, ContentRepositoryConfig, CaptchaConfig,
VoipConfig, RegistrationConfig, MetricsConfig, ApiConfig,
AppServiceConfig, KeyConfig, SAML2Config, CasConfig,

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@ -126,9 +126,22 @@ class ServerConfig(Config):
self.public_baseurl += '/'
self.start_pushers = config.get("start_pushers", True)
self.listeners = config.get("listeners", [])
self.listeners = []
for listener in config.get("listeners", []):
if not isinstance(listener.get("port", None), int):
raise ConfigError(
"Listener configuration is lacking a valid 'port' option"
)
if listener.setdefault("tls", False):
# no_tls is not really supported any more, but let's grandfather it in
# here.
if config.get("no_tls", False):
logger.info(
"Ignoring TLS-enabled listener on port %i due to no_tls"
)
continue
for listener in self.listeners:
bind_address = listener.pop("bind_address", None)
bind_addresses = listener.setdefault("bind_addresses", [])
@ -140,6 +153,8 @@ class ServerConfig(Config):
if not bind_addresses:
bind_addresses.extend(DEFAULT_BIND_ADDRESSES)
self.listeners.append(listener)
if not self.web_client_location:
_warn_if_webclient_configured(self.listeners)
@ -147,6 +162,9 @@ class ServerConfig(Config):
bind_port = config.get("bind_port")
if bind_port:
if config.get("no_tls", False):
raise ConfigError("no_tls is incompatible with bind_port")
self.listeners = []
bind_host = config.get("bind_host", "")
gzip_responses = config.get("gzip_responses", True)
@ -193,6 +211,7 @@ class ServerConfig(Config):
"port": manhole,
"bind_addresses": ["127.0.0.1"],
"type": "manhole",
"tls": False,
})
metrics_port = config.get("metrics_port")
@ -218,6 +237,9 @@ class ServerConfig(Config):
_check_resource_config(self.listeners)
def has_tls_listener(self):
return any(l["tls"] for l in self.listeners)
def default_config(self, server_name, data_dir_path, **kwargs):
_, bind_port = parse_and_validate_server_name(server_name)
if bind_port is not None:

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@ -25,7 +25,7 @@ from OpenSSL import crypto
from synapse.config._base import Config
logger = logging.getLogger()
logger = logging.getLogger(__name__)
class TlsConfig(Config):
@ -51,7 +51,6 @@ class TlsConfig(Config):
self._original_tls_fingerprints = []
self.tls_fingerprints = list(self._original_tls_fingerprints)
self.no_tls = config.get("no_tls", False)
# This config option applies to non-federation HTTP clients
# (e.g. for talking to recaptcha, identity servers, and such)
@ -110,20 +109,10 @@ class TlsConfig(Config):
"""
Read the certificates from disk.
"""
self.tls_certificate = self.read_tls_certificate(self.tls_certificate_file)
self.tls_certificate = self.read_tls_certificate()
# Check if it is self-signed, and issue a warning if so.
if self.tls_certificate.get_issuer() == self.tls_certificate.get_subject():
warnings.warn(
(
"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."
)
)
if not self.no_tls:
self.tls_private_key = self.read_tls_private_key(self.tls_private_key_file)
if self.has_tls_listener():
self.tls_private_key = self.read_tls_private_key()
self.tls_fingerprints = list(self._original_tls_fingerprints)
@ -151,6 +140,8 @@ class TlsConfig(Config):
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.
@ -211,13 +202,6 @@ class TlsConfig(Config):
#
# reprovision_threshold: 30
# If your server runs behind a reverse-proxy which terminates TLS connections
# (for both client and federation connections), it may be useful to disable
# All TLS support for incoming connections. Setting no_tls to True will
# do so (and avoid the need to give synapse a TLS private key).
#
# no_tls: True
# List of allowed TLS fingerprints for this server to publish along
# with the signing keys for this server. Other matrix servers that
# make HTTPS requests to this server will check that the TLS
@ -250,10 +234,38 @@ class TlsConfig(Config):
% locals()
)
def read_tls_certificate(self, cert_path):
cert_pem = self.read_file(cert_path, "tls_certificate")
return crypto.load_certificate(crypto.FILETYPE_PEM, cert_pem)
def read_tls_certificate(self):
"""Reads the TLS certificate from the configured file, and returns it
def read_tls_private_key(self, private_key_path):
private_key_pem = self.read_file(private_key_path, "tls_private_key")
Also checks if it is self-signed, and warns if so
Returns:
OpenSSL.crypto.X509: 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)
# Check if it is self-signed, and issue a warning if so.
if cert.get_issuer() == cert.get_subject():
warnings.warn(
(
"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."
)
)
return cert
def read_tls_private_key(self):
"""Reads the TLS private key from the configured file, and returns it
Returns:
OpenSSL.crypto.PKey: 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)

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@ -43,9 +43,7 @@ class ServerContextFactory(ContextFactory):
logger.exception("Failed to enable elliptic curve for TLS")
context.set_options(SSL.OP_NO_SSLv2 | SSL.OP_NO_SSLv3)
context.use_certificate_chain_file(config.tls_certificate_file)
if not config.no_tls:
context.use_privatekey(config.tls_private_key)
context.use_privatekey(config.tls_private_key)
# https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
context.set_cipher_list(

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@ -20,6 +20,11 @@ from synapse.config.tls import TlsConfig
from tests.unittest import TestCase
class TestConfig(TlsConfig):
def has_tls_listener(self):
return False
class TLSConfigTests(TestCase):
def test_warn_self_signed(self):
@ -55,11 +60,10 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg=
config = {
"tls_certificate_path": os.path.join(config_dir, "cert.pem"),
"no_tls": True,
"tls_fingerprints": []
}
t = TlsConfig()
t = TestConfig()
t.read_config(config)
t.read_certificate_from_disk()