From c37db0211e36cd298426ff8811e547b0acd10bf4 Mon Sep 17 00:00:00 2001 From: Richard van der Hoff <1389908+richvdh@users.noreply.github.com> Date: Tue, 17 Mar 2020 22:32:25 +0100 Subject: Share SSL contexts for non-federation requests (#7094) Extends #5794 etc to the SimpleHttpClient so that it also applies to non-federation requests. Fixes #7092. --- changelog.d/7094.misc | 1 + synapse/crypto/context_factory.py | 68 ++++++++++++++-------- synapse/http/client.py | 3 - synapse/http/federation/matrix_federation_agent.py | 2 +- synapse/server.py | 6 +- tests/config/test_tls.py | 29 +++++---- .../federation/test_matrix_federation_agent.py | 6 +- 7 files changed, 71 insertions(+), 44 deletions(-) create mode 100644 changelog.d/7094.misc diff --git a/changelog.d/7094.misc b/changelog.d/7094.misc new file mode 100644 index 0000000000..aa093ee3c0 --- /dev/null +++ b/changelog.d/7094.misc @@ -0,0 +1 @@ +Improve performance when making HTTPS requests to sygnal, sydent, etc, by sharing the SSL context object between connections. diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py index e93f0b3705..a5a2a7815d 100644 --- a/synapse/crypto/context_factory.py +++ b/synapse/crypto/context_factory.py @@ -75,7 +75,7 @@ class ServerContextFactory(ContextFactory): @implementer(IPolicyForHTTPS) -class ClientTLSOptionsFactory(object): +class FederationPolicyForHTTPS(object): """Factory for Twisted SSLClientConnectionCreators that are used to make connections to remote servers for federation. @@ -103,15 +103,15 @@ class ClientTLSOptionsFactory(object): # let us do). minTLS = _TLS_VERSION_MAP[config.federation_client_minimum_tls_version] - self._verify_ssl = CertificateOptions( + _verify_ssl = CertificateOptions( trustRoot=trust_root, insecurelyLowerMinimumTo=minTLS ) - self._verify_ssl_context = self._verify_ssl.getContext() - self._verify_ssl_context.set_info_callback(self._context_info_cb) + self._verify_ssl_context = _verify_ssl.getContext() + self._verify_ssl_context.set_info_callback(_context_info_cb) - self._no_verify_ssl = CertificateOptions(insecurelyLowerMinimumTo=minTLS) - self._no_verify_ssl_context = self._no_verify_ssl.getContext() - self._no_verify_ssl_context.set_info_callback(self._context_info_cb) + _no_verify_ssl = CertificateOptions(insecurelyLowerMinimumTo=minTLS) + self._no_verify_ssl_context = _no_verify_ssl.getContext() + self._no_verify_ssl_context.set_info_callback(_context_info_cb) def get_options(self, host: bytes): @@ -136,23 +136,6 @@ class ClientTLSOptionsFactory(object): return SSLClientConnectionCreator(host, ssl_context, should_verify) - @staticmethod - def _context_info_cb(ssl_connection, where, ret): - """The 'information callback' for our openssl context object.""" - # we assume that the app_data on the connection object has been set to - # a TLSMemoryBIOProtocol object. (This is done by SSLClientConnectionCreator) - tls_protocol = ssl_connection.get_app_data() - try: - # ... we further assume that SSLClientConnectionCreator has set the - # '_synapse_tls_verifier' attribute to a ConnectionVerifier object. - tls_protocol._synapse_tls_verifier.verify_context_info_cb( - ssl_connection, where - ) - except: # noqa: E722, taken from the twisted implementation - logger.exception("Error during info_callback") - f = Failure() - tls_protocol.failVerification(f) - def creatorForNetloc(self, hostname, port): """Implements the IPolicyForHTTPS interace so that this can be passed directly to agents. @@ -160,6 +143,43 @@ class ClientTLSOptionsFactory(object): return self.get_options(hostname) +@implementer(IPolicyForHTTPS) +class RegularPolicyForHTTPS(object): + """Factory for Twisted SSLClientConnectionCreators that are used to make connections + to remote servers, for other than federation. + + Always uses the same OpenSSL context object, which uses the default OpenSSL CA + trust root. + """ + + def __init__(self): + trust_root = platformTrust() + self._ssl_context = CertificateOptions(trustRoot=trust_root).getContext() + self._ssl_context.set_info_callback(_context_info_cb) + + def creatorForNetloc(self, hostname, port): + return SSLClientConnectionCreator(hostname, self._ssl_context, True) + + +def _context_info_cb(ssl_connection, where, ret): + """The 'information callback' for our openssl context objects. + + Note: Once this is set as the info callback on a Context object, the Context should + only be used with the SSLClientConnectionCreator. + """ + # we assume that the app_data on the connection object has been set to + # a TLSMemoryBIOProtocol object. (This is done by SSLClientConnectionCreator) + tls_protocol = ssl_connection.get_app_data() + try: + # ... we further assume that SSLClientConnectionCreator has set the + # '_synapse_tls_verifier' attribute to a ConnectionVerifier object. + tls_protocol._synapse_tls_verifier.verify_context_info_cb(ssl_connection, where) + except: # noqa: E722, taken from the twisted implementation + logger.exception("Error during info_callback") + f = Failure() + tls_protocol.failVerification(f) + + @implementer(IOpenSSLClientConnectionCreator) class SSLClientConnectionCreator(object): """Creates openssl connection objects for client connections. diff --git a/synapse/http/client.py b/synapse/http/client.py index d4c285445e..3797545824 100644 --- a/synapse/http/client.py +++ b/synapse/http/client.py @@ -244,9 +244,6 @@ class SimpleHttpClient(object): pool.maxPersistentPerHost = max((100 * CACHE_SIZE_FACTOR, 5)) pool.cachedConnectionTimeout = 2 * 60 - # The default context factory in Twisted 14.0.0 (which we require) is - # BrowserLikePolicyForHTTPS which will do regular cert validation - # 'like a browser' self.agent = ProxyAgent( self.reactor, connectTimeout=15, diff --git a/synapse/http/federation/matrix_federation_agent.py b/synapse/http/federation/matrix_federation_agent.py index 647d26dc56..f5f917f5ae 100644 --- a/synapse/http/federation/matrix_federation_agent.py +++ b/synapse/http/federation/matrix_federation_agent.py @@ -45,7 +45,7 @@ class MatrixFederationAgent(object): Args: reactor (IReactor): twisted reactor to use for underlying requests - tls_client_options_factory (ClientTLSOptionsFactory|None): + tls_client_options_factory (FederationPolicyForHTTPS|None): factory to use for fetching client tls options, or none to disable TLS. _srv_resolver (SrvResolver|None): diff --git a/synapse/server.py b/synapse/server.py index fd2f69e928..1b980371de 100644 --- a/synapse/server.py +++ b/synapse/server.py @@ -26,7 +26,6 @@ import logging import os from twisted.mail.smtp import sendmail -from twisted.web.client import BrowserLikePolicyForHTTPS from synapse.api.auth import Auth from synapse.api.filtering import Filtering @@ -35,6 +34,7 @@ from synapse.appservice.api import ApplicationServiceApi from synapse.appservice.scheduler import ApplicationServiceScheduler from synapse.config.homeserver import HomeServerConfig from synapse.crypto import context_factory +from synapse.crypto.context_factory import RegularPolicyForHTTPS from synapse.crypto.keyring import Keyring from synapse.events.builder import EventBuilderFactory from synapse.events.spamcheck import SpamChecker @@ -310,7 +310,7 @@ class HomeServer(object): return ( InsecureInterceptableContextFactory() if self.config.use_insecure_ssl_client_just_for_testing_do_not_use - else BrowserLikePolicyForHTTPS() + else RegularPolicyForHTTPS() ) def build_simple_http_client(self): @@ -420,7 +420,7 @@ class HomeServer(object): return PusherPool(self) def build_http_client(self): - tls_client_options_factory = context_factory.ClientTLSOptionsFactory( + tls_client_options_factory = context_factory.FederationPolicyForHTTPS( self.config ) return MatrixFederationHttpClient(self, tls_client_options_factory) diff --git a/tests/config/test_tls.py b/tests/config/test_tls.py index 1be6ff563b..ec32d4b1ca 100644 --- a/tests/config/test_tls.py +++ b/tests/config/test_tls.py @@ -23,7 +23,7 @@ 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 synapse.crypto.context_factory import FederationPolicyForHTTPS from tests.unittest import TestCase @@ -180,12 +180,13 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg= t = TestConfig() t.read_config(config, config_dir_path="", data_dir_path="") - cf = ClientTLSOptionsFactory(t) + cf = FederationPolicyForHTTPS(t) + options = _get_ssl_context_options(cf._verify_ssl_context) # 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) + self.assertNotEqual(options & SSL.OP_NO_TLSv1, 0) + self.assertNotEqual(options & SSL.OP_NO_TLSv1_1, 0) + self.assertEqual(options & SSL.OP_NO_TLSv1_2, 0) def test_tls_client_minimum_set_passed_through_1_0(self): """ @@ -195,12 +196,13 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg= t = TestConfig() t.read_config(config, config_dir_path="", data_dir_path="") - cf = ClientTLSOptionsFactory(t) + cf = FederationPolicyForHTTPS(t) + options = _get_ssl_context_options(cf._verify_ssl_context) # 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) + self.assertEqual(options & SSL.OP_NO_TLSv1, 0) + self.assertEqual(options & SSL.OP_NO_TLSv1_1, 0) + self.assertEqual(options & SSL.OP_NO_TLSv1_2, 0) def test_acme_disabled_in_generated_config_no_acme_domain_provied(self): """ @@ -273,7 +275,7 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg= t = TestConfig() t.read_config(config, config_dir_path="", data_dir_path="") - cf = ClientTLSOptionsFactory(t) + cf = FederationPolicyForHTTPS(t) # Not in the whitelist opts = cf.get_options(b"notexample.com") @@ -282,3 +284,10 @@ s4niecZKPBizL6aucT59CsunNmmb5Glq8rlAcU+1ZTZZzGYqVYhF6axB9Qg= # 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) + + +def _get_ssl_context_options(ssl_context: SSL.Context) -> int: + """get the options bits from an openssl context object""" + # the OpenSSL.SSL.Context wrapper doesn't expose get_options, so we have to + # use the low-level interface + return SSL._lib.SSL_CTX_get_options(ssl_context._context) diff --git a/tests/http/federation/test_matrix_federation_agent.py b/tests/http/federation/test_matrix_federation_agent.py index cfcd98ff7d..fdc1d918ff 100644 --- a/tests/http/federation/test_matrix_federation_agent.py +++ b/tests/http/federation/test_matrix_federation_agent.py @@ -31,7 +31,7 @@ from twisted.web.http_headers import Headers from twisted.web.iweb import IPolicyForHTTPS from synapse.config.homeserver import HomeServerConfig -from synapse.crypto.context_factory import ClientTLSOptionsFactory +from synapse.crypto.context_factory import FederationPolicyForHTTPS from synapse.http.federation.matrix_federation_agent import MatrixFederationAgent from synapse.http.federation.srv_resolver import Server from synapse.http.federation.well_known_resolver import ( @@ -79,7 +79,7 @@ class MatrixFederationAgentTests(unittest.TestCase): self._config = config = HomeServerConfig() config.parse_config_dict(config_dict, "", "") - self.tls_factory = ClientTLSOptionsFactory(config) + self.tls_factory = FederationPolicyForHTTPS(config) self.well_known_cache = TTLCache("test_cache", timer=self.reactor.seconds) self.had_well_known_cache = TTLCache("test_cache", timer=self.reactor.seconds) @@ -715,7 +715,7 @@ class MatrixFederationAgentTests(unittest.TestCase): config = default_config("test", parse=True) # Build a new agent and WellKnownResolver with a different tls factory - tls_factory = ClientTLSOptionsFactory(config) + tls_factory = FederationPolicyForHTTPS(config) agent = MatrixFederationAgent( reactor=self.reactor, tls_client_options_factory=tls_factory, -- cgit 1.4.1