diff options
| -rw-r--r-- | CHANGES.md | 11 | ||||
| -rw-r--r-- | MANIFEST.in | 4 | ||||
| -rw-r--r-- | changelog.d/5415.bugfix | 1 | ||||
| -rw-r--r-- | synapse/__init__.py | 2 | ||||
| -rw-r--r-- | synapse/config/key.py | 27 | ||||
| -rw-r--r-- | synapse/crypto/context_factory.py | 180 | ||||
| -rw-r--r-- | synapse/crypto/keyring.py | 7 | ||||
| -rw-r--r-- | synapse/python_dependencies.py | 5 | ||||
| -rw-r--r-- | tests/http/__init__.py | 124 | ||||
| -rw-r--r-- | tests/http/ca.crt | 19 | ||||
| -rw-r--r-- | tests/http/ca.key | 27 | ||||
| -rw-r--r-- | tests/http/federation/test_matrix_federation_agent.py | 169 | ||||
| -rw-r--r-- | tests/http/server.key | 27 | ||||
| -rw-r--r-- | tests/http/server.pem | 81 |
14 files changed, 489 insertions, 195 deletions
diff --git a/CHANGES.md b/CHANGES.md index 4dea0f6319..523cdb1153 100644 --- a/CHANGES.md +++ b/CHANGES.md @@ -1,3 +1,14 @@ +Synapse 1.0.0rc2 (2019-06-10) +============================= + +Bugfixes +-------- + +- Remove redundant warning about key server response validation. ([\#5392](https://github.com/matrix-org/synapse/issues/5392)) +- Fix bug where old keys stored in the database with a null valid until timestamp caused all verification requests for that key to fail. ([\#5415](https://github.com/matrix-org/synapse/issues/5415)) +- Fix excessive memory using with default `federation_verify_certificates: true` configuration. ([\#5417](https://github.com/matrix-org/synapse/issues/5417)) + + Synapse 1.0.0rc1 (2019-06-07) ============================= diff --git a/MANIFEST.in b/MANIFEST.in index ad1523e387..2c59c7bdc2 100644 --- a/MANIFEST.in +++ b/MANIFEST.in @@ -18,8 +18,10 @@ recursive-include docs * recursive-include scripts * recursive-include scripts-dev * recursive-include synapse *.pyi -recursive-include tests *.pem recursive-include tests *.py +include tests/http/ca.crt +include tests/http/ca.key +include tests/http/server.key recursive-include synapse/res * recursive-include synapse/static *.css diff --git a/changelog.d/5415.bugfix b/changelog.d/5415.bugfix deleted file mode 100644 index 83629e193d..0000000000 --- a/changelog.d/5415.bugfix +++ /dev/null @@ -1 +0,0 @@ -Fix bug where old keys stored in the database with a null valid until timestamp caused all verification requests for that key to fail. diff --git a/synapse/__init__.py b/synapse/__init__.py index 77a4cfc3a5..8dc07fe73c 100644 --- a/synapse/__init__.py +++ b/synapse/__init__.py @@ -27,4 +27,4 @@ try: except ImportError: pass -__version__ = "1.0.0rc1" +__version__ = "1.0.0rc2" diff --git a/synapse/config/key.py b/synapse/config/key.py index aba7092ccd..424875feae 100644 --- a/synapse/config/key.py +++ b/synapse/config/key.py @@ -41,6 +41,15 @@ validation or TLS certificate validation. This is likely to be very insecure. If you are *sure* you want to do this, set 'accept_keys_insecurely' on the keyserver configuration.""" +RELYING_ON_MATRIX_KEY_ERROR = """\ +Your server is configured to accept key server responses without TLS certificate +validation, and which are only signed by the old (possibly compromised) +matrix.org signing key 'ed25519:auto'. This likely isn't what you want to do, +and you should enable 'federation_verify_certificates' in your configuration. + +If you are *sure* you want to do this, set 'accept_keys_insecurely' on the +trusted_key_server configuration.""" + logger = logging.getLogger(__name__) @@ -340,10 +349,20 @@ def _parse_key_servers(key_servers, federation_verify_certificates): result.verify_keys[key_id] = verify_key if ( - not verify_keys - and not server.get("accept_keys_insecurely") - and not federation_verify_certificates + not federation_verify_certificates and + not server.get("accept_keys_insecurely") ): - raise ConfigError(INSECURE_NOTARY_ERROR) + _assert_keyserver_has_verify_keys(result) yield result + + +def _assert_keyserver_has_verify_keys(trusted_key_server): + if not trusted_key_server.verify_keys: + raise ConfigError(INSECURE_NOTARY_ERROR) + + # also check that they are not blindly checking the old matrix.org key + if trusted_key_server.server_name == "matrix.org" and any( + key_id == "ed25519:auto" for key_id in trusted_key_server.verify_keys + ): + raise ConfigError(RELYING_ON_MATRIX_KEY_ERROR) diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py index 59ea087e66..2bc5cc3807 100644 --- a/synapse/crypto/context_factory.py +++ b/synapse/crypto/context_factory.py @@ -15,10 +15,13 @@ import logging +import idna +from service_identity import VerificationError +from service_identity.pyopenssl import verify_hostname, verify_ip_address from zope.interface import implementer from OpenSSL import SSL, crypto -from twisted.internet._sslverify import ClientTLSOptions, _defaultCurveName +from twisted.internet._sslverify import _defaultCurveName from twisted.internet.abstract import isIPAddress, isIPv6Address from twisted.internet.interfaces import IOpenSSLClientConnectionCreator from twisted.internet.ssl import CertificateOptions, ContextFactory, platformTrust @@ -56,79 +59,19 @@ class ServerContextFactory(ContextFactory): return self._context -def _idnaBytes(text): - """ - Convert some text typed by a human into some ASCII bytes. This is a - copy of twisted.internet._idna._idnaBytes. For documentation, see the - twisted documentation. - """ - try: - import idna - except ImportError: - return text.encode("idna") - else: - return idna.encode(text) - - -def _tolerateErrors(wrapped): - """ - Wrap up an info_callback for pyOpenSSL so that if something goes wrong - the error is immediately logged and the connection is dropped if possible. - This is a copy of twisted.internet._sslverify._tolerateErrors. For - documentation, see the twisted documentation. - """ - - def infoCallback(connection, where, ret): - try: - return wrapped(connection, where, ret) - except: # noqa: E722, taken from the twisted implementation - f = Failure() - logger.exception("Error during info_callback") - connection.get_app_data().failVerification(f) - - return infoCallback +class ClientTLSOptionsFactory(object): + """Factory for Twisted SSLClientConnectionCreators that are used to make connections + to remote servers for federation. + Uses one of two OpenSSL context objects for all connections, depending on whether + we should do SSL certificate verification. -@implementer(IOpenSSLClientConnectionCreator) -class ClientTLSOptionsNoVerify(object): - """ - Client creator for TLS without certificate identity verification. This is a - copy of twisted.internet._sslverify.ClientTLSOptions with the identity - verification left out. For documentation, see the twisted documentation. + get_options decides whether we should do SSL certificate verification and + constructs an SSLClientConnectionCreator factory accordingly. """ - def __init__(self, hostname, ctx): - self._ctx = ctx - - if isIPAddress(hostname) or isIPv6Address(hostname): - self._hostnameBytes = hostname.encode('ascii') - self._sendSNI = False - else: - self._hostnameBytes = _idnaBytes(hostname) - self._sendSNI = True - - ctx.set_info_callback(_tolerateErrors(self._identityVerifyingInfoCallback)) - - def clientConnectionForTLS(self, tlsProtocol): - context = self._ctx - connection = SSL.Connection(context, None) - connection.set_app_data(tlsProtocol) - return connection - - def _identityVerifyingInfoCallback(self, connection, where, ret): - # Literal IPv4 and IPv6 addresses are not permitted - # as host names according to the RFCs - if where & SSL.SSL_CB_HANDSHAKE_START and self._sendSNI: - connection.set_tlsext_host_name(self._hostnameBytes) - - -class ClientTLSOptionsFactory(object): - """Factory for Twisted ClientTLSOptions that are used to make connections - to remote servers for federation.""" - def __init__(self, config): self._config = config - self._options_noverify = CertificateOptions() # Check if we're using a custom list of a CA certificates trust_root = config.federation_ca_trust_root @@ -136,11 +79,13 @@ class ClientTLSOptionsFactory(object): # Use CA root certs provided by OpenSSL trust_root = platformTrust() - self._options_verify = CertificateOptions(trustRoot=trust_root) + self._verify_ssl_context = CertificateOptions(trustRoot=trust_root).getContext() + self._verify_ssl_context.set_info_callback(self._context_info_cb) - def get_options(self, host): - # Use _makeContext so that we get a fresh OpenSSL CTX each time. + self._no_verify_ssl_context = CertificateOptions().getContext() + self._no_verify_ssl_context.set_info_callback(self._context_info_cb) + def get_options(self, host): # Check if certificate verification has been enabled should_verify = self._config.federation_verify_certificates @@ -151,6 +96,93 @@ class ClientTLSOptionsFactory(object): should_verify = False break - if should_verify: - return ClientTLSOptions(host, self._options_verify._makeContext()) - return ClientTLSOptionsNoVerify(host, self._options_noverify._makeContext()) + ssl_context = ( + self._verify_ssl_context if should_verify else self._no_verify_ssl_context + ) + + 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) + + +@implementer(IOpenSSLClientConnectionCreator) +class SSLClientConnectionCreator(object): + """Creates openssl connection objects for client connections. + + Replaces twisted.internet.ssl.ClientTLSOptions + """ + + def __init__(self, hostname, ctx, verify_certs): + self._ctx = ctx + self._verifier = ConnectionVerifier(hostname, verify_certs) + + def clientConnectionForTLS(self, tls_protocol): + context = self._ctx + connection = SSL.Connection(context, None) + + # as per twisted.internet.ssl.ClientTLSOptions, we set the application + # data to our TLSMemoryBIOProtocol... + connection.set_app_data(tls_protocol) + + # ... and we also gut-wrench a '_synapse_tls_verifier' attribute into the + # tls_protocol so that the SSL context's info callback has something to + # call to do the cert verification. + setattr(tls_protocol, "_synapse_tls_verifier", self._verifier) + return connection + + +class ConnectionVerifier(object): + """Set the SNI, and do cert verification + + This is a thing which is attached to the TLSMemoryBIOProtocol, and is called by + the ssl context's info callback. + """ + + # This code is based on twisted.internet.ssl.ClientTLSOptions. + + def __init__(self, hostname, verify_certs): + self._verify_certs = verify_certs + + if isIPAddress(hostname) or isIPv6Address(hostname): + self._hostnameBytes = hostname.encode("ascii") + self._is_ip_address = True + else: + # twisted's ClientTLSOptions falls back to the stdlib impl here if + # idna is not installed, but points out that lacks support for + # IDNA2008 (http://bugs.python.org/issue17305). + # + # We can rely on having idna. + self._hostnameBytes = idna.encode(hostname) + self._is_ip_address = False + + self._hostnameASCII = self._hostnameBytes.decode("ascii") + + def verify_context_info_cb(self, ssl_connection, where): + if where & SSL.SSL_CB_HANDSHAKE_START and not self._is_ip_address: + ssl_connection.set_tlsext_host_name(self._hostnameBytes) + + if where & SSL.SSL_CB_HANDSHAKE_DONE and self._verify_certs: + try: + if self._is_ip_address: + verify_ip_address(ssl_connection, self._hostnameASCII) + else: + verify_hostname(ssl_connection, self._hostnameASCII) + except VerificationError: + f = Failure() + tls_protocol = ssl_connection.get_app_data() + tls_protocol.failVerification(f) diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py index 96964b0d50..6f603f1961 100644 --- a/synapse/crypto/keyring.py +++ b/synapse/crypto/keyring.py @@ -750,13 +750,6 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher): verify_signed_json(response, perspective_name, perspective_keys[key_id]) verified = True - if perspective_name == "matrix.org" and key_id == "ed25519:auto": - logger.warning( - "Trusting trusted_key_server responses signed by the " - "compromised matrix.org signing key 'ed25519:auto'. " - "This is a placebo." - ) - if not verified: raise KeyLookupError( "Response not signed with a known key: signed with: %r, known keys: %r" diff --git a/synapse/python_dependencies.py b/synapse/python_dependencies.py index c78f2cb15e..6efd81f204 100644 --- a/synapse/python_dependencies.py +++ b/synapse/python_dependencies.py @@ -44,7 +44,10 @@ REQUIREMENTS = [ "canonicaljson>=1.1.3", "signedjson>=1.0.0", "pynacl>=1.2.1", - "service_identity>=16.0.0", + "idna>=2", + + # validating SSL certs for IP addresses requires service_identity 18.1. + "service_identity>=18.1.0", # our logcontext handling relies on the ability to cancel inlineCallbacks # (https://twistedmatrix.com/trac/ticket/4632) which landed in Twisted 18.7. diff --git a/tests/http/__init__.py b/tests/http/__init__.py index 851fc0eb33..2d5dba6464 100644 --- a/tests/http/__init__.py +++ b/tests/http/__init__.py @@ -13,28 +13,122 @@ # See the License for the specific language governing permissions and # limitations under the License. import os.path +import subprocess + +from zope.interface import implementer from OpenSSL import SSL +from OpenSSL.SSL import Connection +from twisted.internet.interfaces import IOpenSSLServerConnectionCreator + + +def get_test_ca_cert_file(): + """Get the path to the test CA cert + + The keypair is generated with: + + openssl genrsa -out ca.key 2048 + openssl req -new -x509 -key ca.key -days 3650 -out ca.crt \ + -subj '/CN=synapse test CA' + """ + return os.path.join(os.path.dirname(__file__), "ca.crt") + + +def get_test_key_file(): + """get the path to the test key + + The key file is made with: + + openssl genrsa -out server.key 2048 + """ + return os.path.join(os.path.dirname(__file__), "server.key") + + +cert_file_count = 0 + +CONFIG_TEMPLATE = b"""\ +[default] +basicConstraints = CA:FALSE +keyUsage=nonRepudiation, digitalSignature, keyEncipherment +subjectAltName = %(sanentries)s +""" + + +def create_test_cert_file(sanlist): + """build an x509 certificate file + + Args: + sanlist: list[bytes]: a list of subjectAltName values for the cert + + Returns: + str: the path to the file + """ + global cert_file_count + csr_filename = "server.csr" + cnf_filename = "server.%i.cnf" % (cert_file_count,) + cert_filename = "server.%i.crt" % (cert_file_count,) + cert_file_count += 1 + + # first build a CSR + subprocess.check_call( + [ + "openssl", + "req", + "-new", + "-key", + get_test_key_file(), + "-subj", + "/", + "-out", + csr_filename, + ] + ) + # now a config file describing the right SAN entries + sanentries = b",".join(sanlist) + with open(cnf_filename, "wb") as f: + f.write(CONFIG_TEMPLATE % {b"sanentries": sanentries}) -def get_test_cert_file(): - """get the path to the test cert""" + # finally the cert + ca_key_filename = os.path.join(os.path.dirname(__file__), "ca.key") + ca_cert_filename = get_test_ca_cert_file() + subprocess.check_call( + [ + "openssl", + "x509", + "-req", + "-in", + csr_filename, + "-CA", + ca_cert_filename, + "-CAkey", + ca_key_filename, + "-set_serial", + "1", + "-extfile", + cnf_filename, + "-out", + cert_filename, + ] + ) - # the cert file itself is made with: - # - # openssl req -x509 -newkey rsa:4096 -keyout server.pem -out server.pem -days 36500 \ - # -nodes -subj '/CN=testserv' - return os.path.join(os.path.dirname(__file__), 'server.pem') + return cert_filename -class ServerTLSContext(object): - """A TLS Context which presents our test cert.""" +@implementer(IOpenSSLServerConnectionCreator) +class TestServerTLSConnectionFactory(object): + """An SSL connection creator which returns connections which present a certificate + signed by our test CA.""" - def __init__(self): - self.filename = get_test_cert_file() + def __init__(self, sanlist): + """ + Args: + sanlist: list[bytes]: a list of subjectAltName values for the cert + """ + self._cert_file = create_test_cert_file(sanlist) - def getContext(self): + def serverConnectionForTLS(self, tlsProtocol): ctx = SSL.Context(SSL.TLSv1_METHOD) - ctx.use_certificate_file(self.filename) - ctx.use_privatekey_file(self.filename) - return ctx + ctx.use_certificate_file(self._cert_file) + ctx.use_privatekey_file(get_test_key_file()) + return Connection(ctx, None) diff --git a/tests/http/ca.crt b/tests/http/ca.crt new file mode 100644 index 0000000000..730f81e99c --- /dev/null +++ b/tests/http/ca.crt @@ -0,0 +1,19 @@ +-----BEGIN CERTIFICATE----- +MIIDCjCCAfKgAwIBAgIJAPwHIHgH/jtjMA0GCSqGSIb3DQEBCwUAMBoxGDAWBgNV +BAMMD3N5bmFwc2UgdGVzdCBDQTAeFw0xOTA2MTAxMTI2NDdaFw0yOTA2MDcxMTI2 +NDdaMBoxGDAWBgNVBAMMD3N5bmFwc2UgdGVzdCBDQTCCASIwDQYJKoZIhvcNAQEB +BQADggEPADCCAQoCggEBAOZOXCKuylf9jHzJXpU2nS+XEKrnGPgs2SAhQKrzBxg3 +/d8KT2Zsfsj1i3G7oGu7B0ZKO6qG5AxOPCmSMf9/aiSHFilfSh+r8rCpJyWMev2c +/w/xmhoFHgn+H90NnqlXvWb5y1YZCE3gWaituQSaa93GPKacRqXCgIrzjPUuhfeT +uwFQt4iyUhMNBYEy3aw4IuIHdyBqi4noUhR2ZeuflLJ6PswdJ8mEiAvxCbBGPerq +idhWcZwlo0fKu4u1uu5B8TnTsMg2fJgL6c5olBG90Urt22gA6anfP5W/U1ZdVhmB +T3Rv5SJMkGyMGE6sEUetLFyb2GJpgGD7ePkUCZr+IMMCAwEAAaNTMFEwHQYDVR0O +BBYEFLg7nTCYsvQXWTyS6upLc0YTlIwRMB8GA1UdIwQYMBaAFLg7nTCYsvQXWTyS +6upLc0YTlIwRMA8GA1UdEwEB/wQFMAMBAf8wDQYJKoZIhvcNAQELBQADggEBADqx +GX4Ul5OGQlcG+xTt4u3vMCeqGo8mh1AnJ7zQbyRmwjJiNxJVX+/EcqFSTsmkBNoe +xdYITI7Z6dyoiKw99yCZDE7gALcyACEU7r0XY7VY/hebAaX6uLaw1sZKKAIC04lD +KgCu82tG85n60Qyud5SiZZF0q1XVq7lbvOYVdzVZ7k8Vssy5p9XnaLJLMggYeOiX +psHIQjvYGnTTEBZZHzWOrc0WGThd69wxTOOkAbCsoTPEwZL8BGUsdtLWtvhp452O +npvaUBzKg39R5X3KTdhB68XptiQfzbQkd3FtrwNuYPUywlsg55Bxkv85n57+xDO3 +D9YkgUqEp0RGUXQgCsQ= +-----END CERTIFICATE----- diff --git a/tests/http/ca.key b/tests/http/ca.key new file mode 100644 index 0000000000..5c99cae186 --- /dev/null +++ b/tests/http/ca.key @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpgIBAAKCAQEA5k5cIq7KV/2MfMlelTadL5cQqucY+CzZICFAqvMHGDf93wpP +Zmx+yPWLcbuga7sHRko7qobkDE48KZIx/39qJIcWKV9KH6vysKknJYx6/Zz/D/Ga +GgUeCf4f3Q2eqVe9ZvnLVhkITeBZqK25BJpr3cY8ppxGpcKAivOM9S6F95O7AVC3 +iLJSEw0FgTLdrDgi4gd3IGqLiehSFHZl65+Usno+zB0nyYSIC/EJsEY96uqJ2FZx +nCWjR8q7i7W67kHxOdOwyDZ8mAvpzmiUEb3RSu3baADpqd8/lb9TVl1WGYFPdG/l +IkyQbIwYTqwRR60sXJvYYmmAYPt4+RQJmv4gwwIDAQABAoIBAQCFuFG+wYYy+MCt +Y65LLN6vVyMSWAQjdMbM5QHLQDiKU1hQPIhFjBFBVXCVpL9MTde3dDqYlKGsk3BT +ItNs6eoTM2wmsXE0Wn4bHNvh7WMsBhACjeFP4lDCtI6DpvjMkmkidT8eyoIL1Yu5 +aMTYa2Dd79AfXPWYIQrJowfhBBY83KuW5fmYnKKDVLqkT9nf2dgmmQz85RgtNiZC +zFkIsNmPqH1zRbcw0wORfOBrLFvsMc4Tt8EY5Wz3NnH8Zfgf8Q3MgARH1yspz3Vp +B+EYHbsK17xZ+P59KPiX3yefvyYWEUjFF7ymVsVnDxLugYl4pXwWUpm19GxeDvFk +cgBUD5OBAoGBAP7lBdCp6lx6fYtxdxUm3n4MMQmYcac4qZdeBIrvpFMnvOBBuixl +eavcfFmFdwgAr8HyVYiu9ynac504IYvmtYlcpUmiRBbmMHbvLQEYHl7FYFKNz9ej +2ue4oJE3RsPdLsD3xIlc+xN8oT1j0knyorwsHdj0Sv77eZzZS9XZZfJzAoGBAOdO +CibYmoNqK/mqDHkp6PgsnbQGD5/CvPF/BLUWV1QpHxLzUQQeoBOQW5FatHe1H5zi +mbq3emBefVmsCLrRIJ4GQu4vsTMfjcpGLwviWmaK6pHbGPt8IYeEQ2MNyv59EtA2 +pQy4dX7/Oe6NLAR1UEQjXmCuXf+rxnxF3VJd1nRxAoGBANb9eusl9fusgSnVOTjJ +AQ7V36KVRv9hZoG6liBNwo80zDVmms4JhRd1MBkd3mkMkzIF4SkZUnWlwLBSANGM +dX/3eZ5i1AVwgF5Am/f5TNxopDbdT/o1RVT/P8dcFT7s1xuBn+6wU0F7dFBgWqVu +lt4aY85zNrJcj5XBHhqwdDGLAoGBAIksPNUAy9F3m5C6ih8o/aKAQx5KIeXrBUZq +v43tK+kbYfRJHBjHWMOBbuxq0G/VmGPf9q9GtGqGXuxZG+w+rYtJx1OeMQZShjIZ +ITl5CYeahrXtK4mo+fF2PMh3m5UE861LWuKKWhPwpJiWXC5grDNcjlHj1pcTdeip +PjHkuJPhAoGBAIh35DptqqdicOd3dr/+/m2YQywY8aSpMrR0bC06aAkscD7oq4tt +s/jwl0UlHIrEm/aMN7OnGIbpfkVdExfGKYaa5NRlgOwQpShwLufIo/c8fErd2zb8 +K3ptlwBxMrayMXpS3DP78r83Z0B8/FSK2guelzdRJ3ftipZ9io1Gss1C +-----END RSA PRIVATE KEY----- diff --git a/tests/http/federation/test_matrix_federation_agent.py b/tests/http/federation/test_matrix_federation_agent.py index 05880a1048..ecce473b01 100644 --- a/tests/http/federation/test_matrix_federation_agent.py +++ b/tests/http/federation/test_matrix_federation_agent.py @@ -17,12 +17,14 @@ import logging from mock import Mock import treq +from service_identity import VerificationError from zope.interface import implementer from twisted.internet import defer from twisted.internet._sslverify import ClientTLSOptions, OpenSSLCertificateOptions from twisted.internet.protocol import Factory from twisted.protocols.tls import TLSMemoryBIOFactory +from twisted.web._newclient import ResponseNeverReceived from twisted.web.http import HTTPChannel from twisted.web.http_headers import Headers from twisted.web.iweb import IPolicyForHTTPS @@ -37,13 +39,29 @@ from synapse.http.federation.srv_resolver import Server from synapse.util.caches.ttlcache import TTLCache from synapse.util.logcontext import LoggingContext -from tests.http import ServerTLSContext +from tests.http import TestServerTLSConnectionFactory, get_test_ca_cert_file from tests.server import FakeTransport, ThreadedMemoryReactorClock from tests.unittest import TestCase from tests.utils import default_config logger = logging.getLogger(__name__) +test_server_connection_factory = None + + +def get_connection_factory(): + # this needs to happen once, but not until we are ready to run the first test + global test_server_connection_factory + if test_server_connection_factory is None: + test_server_connection_factory = TestServerTLSConnectionFactory(sanlist=[ + b'DNS:testserv', + b'DNS:target-server', + b'DNS:xn--bcher-kva.com', + b'IP:1.2.3.4', + b'IP:::1', + ]) + return test_server_connection_factory + class MatrixFederationAgentTests(TestCase): def setUp(self): @@ -53,12 +71,11 @@ class MatrixFederationAgentTests(TestCase): self.well_known_cache = TTLCache("test_cache", timer=self.reactor.seconds) - # for now, we disable cert verification for the test, since the cert we - # present will not be trusted. We should do better here, though. config_dict = default_config("test", parse=False) - config_dict["federation_verify_certificates"] = False - config_dict["trusted_key_servers"] = [] - config = HomeServerConfig() + config_dict["federation_custom_ca_list"] = [get_test_ca_cert_file()] + # config_dict["trusted_key_servers"] = [] + + self._config = config = HomeServerConfig() config.parse_config_dict(config_dict) self.agent = MatrixFederationAgent( @@ -77,7 +94,7 @@ class MatrixFederationAgentTests(TestCase): """ # build the test server - server_tls_protocol = _build_test_server() + server_tls_protocol = _build_test_server(get_connection_factory()) # now, tell the client protocol factory to build the client protocol (it will be a # _WrappingProtocol, around a TLSMemoryBIOProtocol, around an @@ -328,6 +345,88 @@ class MatrixFederationAgentTests(TestCase): self.reactor.pump((0.1,)) self.successResultOf(test_d) + def test_get_hostname_bad_cert(self): + """ + Test the behaviour when the certificate on the server doesn't match the hostname + """ + self.mock_resolver.resolve_service.side_effect = lambda _: [] + self.reactor.lookups["testserv1"] = "1.2.3.4" + + test_d = self._make_get_request(b"matrix://testserv1/foo/bar") + + # Nothing happened yet + self.assertNoResult(test_d) + + # No SRV record lookup yet + self.mock_resolver.resolve_service.assert_not_called() + + # there should be an attempt to connect on port 443 for the .well-known + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + (host, port, client_factory, _timeout, _bindAddress) = clients[0] + self.assertEqual(host, '1.2.3.4') + self.assertEqual(port, 443) + + # fonx the connection + client_factory.clientConnectionFailed(None, Exception("nope")) + + # attemptdelay on the hostnameendpoint is 0.3, so takes that long before the + # .well-known request fails. + self.reactor.pump((0.4,)) + + # now there should be a SRV lookup + self.mock_resolver.resolve_service.assert_called_once_with( + b"_matrix._tcp.testserv1" + ) + + # we should fall back to a direct connection + self.assertEqual(len(clients), 2) + (host, port, client_factory, _timeout, _bindAddress) = clients[1] + self.assertEqual(host, '1.2.3.4') + self.assertEqual(port, 8448) + + # make a test server, and wire up the client + http_server = self._make_connection(client_factory, expected_sni=b'testserv1') + + # there should be no requests + self.assertEqual(len(http_server.requests), 0) + + # ... and the request should have failed + e = self.failureResultOf(test_d, ResponseNeverReceived) + failure_reason = e.value.reasons[0] + self.assertIsInstance(failure_reason.value, VerificationError) + + def test_get_ip_address_bad_cert(self): + """ + Test the behaviour when the server name contains an explicit IP, but + the server cert doesn't cover it + """ + # there will be a getaddrinfo on the IP + self.reactor.lookups["1.2.3.5"] = "1.2.3.5" + + test_d = self._make_get_request(b"matrix://1.2.3.5/foo/bar") + + # Nothing happened yet + self.assertNoResult(test_d) + + # Make sure treq is trying to connect + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + (host, port, client_factory, _timeout, _bindAddress) = clients[0] + self.assertEqual(host, '1.2.3.5') + self.assertEqual(port, 8448) + + # make a test server, and wire up the client + http_server = self._make_connection(client_factory, expected_sni=None) + + # there should be no requests + self.assertEqual(len(http_server.requests), 0) + + # ... and the request should have failed + e = self.failureResultOf(test_d, ResponseNeverReceived) + failure_reason = e.value.reasons[0] + self.assertIsInstance(failure_reason.value, VerificationError) + def test_get_no_srv_no_well_known(self): """ Test the behaviour when the server name has no port, no SRV, and no well-known @@ -585,6 +684,49 @@ class MatrixFederationAgentTests(TestCase): self.reactor.pump((0.1,)) self.successResultOf(test_d) + def test_get_well_known_unsigned_cert(self): + """Test the behaviour when the .well-known server presents a cert + not signed by a CA + """ + + # we use the same test server as the other tests, but use an agent + # with _well_known_tls_policy left to the default, which will not + # trust it (since the presented cert is signed by a test CA) + + self.mock_resolver.resolve_service.side_effect = lambda _: [] + self.reactor.lookups["testserv"] = "1.2.3.4" + + agent = MatrixFederationAgent( + reactor=self.reactor, + tls_client_options_factory=ClientTLSOptionsFactory(self._config), + _srv_resolver=self.mock_resolver, + _well_known_cache=self.well_known_cache, + ) + + test_d = agent.request(b"GET", b"matrix://testserv/foo/bar") + + # Nothing happened yet + self.assertNoResult(test_d) + + # there should be an attempt to connect on port 443 for the .well-known + clients = self.reactor.tcpClients + self.assertEqual(len(clients), 1) + (host, port, client_factory, _timeout, _bindAddress) = clients[0] + self.assertEqual(host, '1.2.3.4') + self.assertEqual(port, 443) + + http_proto = self._make_connection( + client_factory, expected_sni=b"testserv", + ) + + # there should be no requests + self.assertEqual(len(http_proto.requests), 0) + + # and there should be a SRV lookup instead + self.mock_resolver.resolve_service.assert_called_once_with( + b"_matrix._tcp.testserv" + ) + def test_get_hostname_srv(self): """ Test the behaviour when there is a single SRV record @@ -918,11 +1060,17 @@ def _check_logcontext(context): raise AssertionError("Expected logcontext %s but was %s" % (context, current)) -def _build_test_server(): +def _build_test_server(connection_creator): """Construct a test server This builds an HTTP channel, wrapped with a TLSMemoryBIOProtocol + Args: + connection_creator (IOpenSSLServerConnectionCreator): thing to build + SSL connections + sanlist (list[bytes]): list of the SAN entries for the cert returned + by the server + Returns: TLSMemoryBIOProtocol """ @@ -931,7 +1079,7 @@ def _build_test_server(): server_factory.log = _log_request server_tls_factory = TLSMemoryBIOFactory( - ServerTLSContext(), isClient=False, wrappedFactory=server_factory + connection_creator, isClient=False, wrappedFactory=server_factory ) return server_tls_factory.buildProtocol(None) @@ -944,7 +1092,8 @@ def _log_request(request): @implementer(IPolicyForHTTPS) class TrustingTLSPolicyForHTTPS(object): - """An IPolicyForHTTPS which doesn't do any certificate verification""" + """An IPolicyForHTTPS which checks that the certificate belongs to the + right server, but doesn't check the certificate chain.""" def creatorForNetloc(self, hostname, port): certificateOptions = OpenSSLCertificateOptions() diff --git a/tests/http/server.key b/tests/http/server.key new file mode 100644 index 0000000000..c53ee02b21 --- /dev/null +++ b/tests/http/server.key @@ -0,0 +1,27 @@ +-----BEGIN RSA PRIVATE KEY----- +MIIEpAIBAAKCAQEAvUAWLOE6TEp3FYSfEnJMwYtJg3KIW5BjiAOOvFVOVQfJ5eEa +vzyJ1Z+8DUgLznFnUkAeD9GjPvP7awl3NPJKLQSMkV5Tp+ea4YyV+Aa4R7flROEa +zCGvmleydZw0VqN1atVZ0ikEoglM/APJQd70ec7KSR3QoxaV2/VNCHmyAPdP+0WI +llV54VXX1CZrWSHaCSn1gzo3WjnGbxTOCQE5Z4k5hqJAwLWWhxDv+FX/jD38Sq3H +gMFNpXJv6FYwwaKU8awghHdSY/qlBPE/1rU83vIBFJ3jW6I1WnQDfCQ69of5vshK +N4v4hok56ScwdUnk8lw6xvJx1Uav/XQB9qGh4QIDAQABAoIBAQCHLO5p8hotAgdb +JFZm26N9nxrMPBOvq0ucjEX4ucnwrFaGzynGrNwa7TRqHCrqs0/EjS2ryOacgbL0 +eldeRy26SASLlN+WD7UuI7e+6DXabDzj3RHB+tGuIbPDk+ZCeBDXVTsKBOhdQN1v +KNkpJrJjCtSsMxKiWvCBow353srJKqCDZcF5NIBYBeDBPMoMbfYn5dJ9JhEf+2h4 +0iwpnWDX1Vqf46pCRa0hwEyMXycGeV2CnfJSyV7z52ZHQrvkz8QspSnPpnlCnbOE +UAvc8kZ5e8oZE7W+JfkK38vHbEGM1FCrBmrC/46uUGMRpZfDferGs91RwQVq/F0n +JN9hLzsBAoGBAPh2pm9Xt7a4fWSkX0cDgjI7PT2BvLUjbRwKLV+459uDa7+qRoGE +sSwb2QBqmQ1kbr9JyTS+Ld8dyUTsGHZK+YbTieAxI3FBdKsuFtcYJO/REN0vik+6 +fMaBHPvDHSU2ioq7spZ4JBFskzqs38FvZ0lX7aa3fguMk8GMLnofQ8QxAoGBAML9 +o5sJLN9Tk9bv2aFgnERgfRfNjjV4Wd99TsktnCD04D1GrP2eDSLfpwFlCnguck6b +jxikqcolsNhZH4dgYHqRNj+IljSdl+sYZiygO6Ld0XU+dEFO86N3E9NzZhKcQ1at +85VdwNPCS7JM2fIxEvS9xfbVnsmK6/37ZZ5iI7yxAoGBALw2vRtJGmy60pojfd1A +hibhAyINnlKlFGkSOI7zdgeuRTf6l9BTIRclvTt4hJpFgzM6hMWEbyE94hJoupsZ +bm443o/LCWsox2VI05p6urhD6f9znNWKkiyY78izY+elqksvpjgfqEresaTYAeP5 +LQe9KNSK2VuMUP1j4G04M9BxAoGAWe8ITZJuytZOgrz/YIohqPvj1l2tcIYA1a6C +7xEFSMIIxtpZIWSLZIFJEsCakpHBkPX4iwIveZfmt/JrM1JFTWK6ZZVGyh/BmOIZ +Bg4lU1oBqJTUo+aZQtTCJS29b2n5OPpkNYkXTdP4e9UsVKNDvfPlYZJneUeEzxDr +bqCPIRECgYA544KMwrWxDQZg1dsKWgdVVKx80wEFZAiQr9+0KF6ch6Iu7lwGJHFY +iI6O85paX41qeC/Fo+feIWJVJU2GvG6eBsbO4bmq+KSg4NkABJSYxodgBp9ftNeD +jo1tfw+gudlNe5jXHu7oSX93tqGjR4Cnlgan/KtfkB96yHOumGmOhQ== +-----END RSA PRIVATE KEY----- diff --git a/tests/http/server.pem b/tests/http/server.pem deleted file mode 100644 index 0584cf1a80..0000000000 --- a/tests/http/server.pem +++ /dev/null @@ -1,81 +0,0 @@ ------BEGIN PRIVATE KEY----- -MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQCgF43/3lAgJ+p0 -x7Rn8UcL8a4fctvdkikvZrCngw96LkB34Evfq8YGWlOVjU+f9naUJLAKMatmAfEN 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-f0ytW6qZ0TpHbD6gOtQLYDnhx3ISuX+QYSekVwQUpffeWQ== ------END CERTIFICATE----- |