diff options
Diffstat (limited to 'synapse')
| -rw-r--r-- | synapse/config/server.py | 11 | ||||
| -rw-r--r-- | synapse/federation/transport/server.py | 5 | ||||
| -rw-r--r-- | synapse/http/endpoint.py | 47 |
3 files changed, 54 insertions, 9 deletions
diff --git a/synapse/config/server.py b/synapse/config/server.py index 968ecd9ea0..71fd51e4bc 100644 --- a/synapse/config/server.py +++ b/synapse/config/server.py @@ -16,6 +16,7 @@ import logging +from synapse.http.endpoint import parse_and_validate_server_name from ._base import Config, ConfigError logger = logging.Logger(__name__) @@ -25,6 +26,12 @@ class ServerConfig(Config): def read_config(self, config): self.server_name = config["server_name"] + + try: + parse_and_validate_server_name(self.server_name) + except ValueError as e: + raise ConfigError(str(e)) + self.pid_file = self.abspath(config.get("pid_file")) self.web_client = config["web_client"] self.web_client_location = config.get("web_client_location", None) @@ -162,8 +169,8 @@ class ServerConfig(Config): }) def default_config(self, server_name, **kwargs): - if ":" in server_name: - bind_port = int(server_name.split(":")[1]) + _, bind_port = parse_and_validate_server_name(server_name) + if bind_port is not None: unsecure_port = bind_port - 400 else: bind_port = 8448 diff --git a/synapse/federation/transport/server.py b/synapse/federation/transport/server.py index 1180d4b69d..e1fdcc89dc 100644 --- a/synapse/federation/transport/server.py +++ b/synapse/federation/transport/server.py @@ -18,7 +18,7 @@ from twisted.internet import defer from synapse.api.urls import FEDERATION_PREFIX as PREFIX from synapse.api.errors import Codes, SynapseError, FederationDeniedError -from synapse.http.endpoint import parse_server_name +from synapse.http.endpoint import parse_and_validate_server_name from synapse.http.server import JsonResource from synapse.http.servlet import ( parse_json_object_from_request, parse_integer_from_args, parse_string_from_args, @@ -170,8 +170,9 @@ def _parse_auth_header(header_bytes): return value origin = strip_quotes(param_dict["origin"]) + # ensure that the origin is a valid server name - parse_server_name(origin) + parse_and_validate_server_name(origin) key = strip_quotes(param_dict["key"]) sig = strip_quotes(param_dict["sig"]) diff --git a/synapse/http/endpoint.py b/synapse/http/endpoint.py index 5a9cbb3324..1b1123b292 100644 --- a/synapse/http/endpoint.py +++ b/synapse/http/endpoint.py @@ -12,6 +12,8 @@ # 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 re + from twisted.internet.endpoints import HostnameEndpoint, wrapClientTLS from twisted.internet import defer from twisted.internet.error import ConnectError @@ -41,8 +43,6 @@ _Server = collections.namedtuple( def parse_server_name(server_name): """Split a server name into host/port parts. - Does some basic sanity checking of the - Args: server_name (str): server name to parse @@ -55,9 +55,6 @@ def parse_server_name(server_name): try: if server_name[-1] == ']': # ipv6 literal, hopefully - if server_name[0] != '[': - raise Exception() - return server_name, None domain_port = server_name.rsplit(":", 1) @@ -68,6 +65,46 @@ def parse_server_name(server_name): raise ValueError("Invalid server name '%s'" % server_name) +VALID_HOST_REGEX = re.compile( + "\\A[0-9a-zA-Z.-]+\\Z", +) + + +def parse_and_validate_server_name(server_name): + """Split a server name into host/port parts and do some basic validation. + + Args: + server_name (str): server name to parse + + Returns: + Tuple[str, int|None]: host/port parts. + + Raises: + ValueError if the server name could not be parsed. + """ + host, port = parse_server_name(server_name) + + # these tests don't need to be bulletproof as we'll find out soon enough + # if somebody is giving us invalid data. What we *do* need is to be sure + # that nobody is sneaking IP literals in that look like hostnames, etc. + + # look for ipv6 literals + if host[0] == '[': + if host[-1] != ']': + raise ValueError("Mismatched [...] in server name '%s'" % ( + server_name, + )) + return host, port + + # otherwise it should only be alphanumerics. + if not VALID_HOST_REGEX.match(host): + raise ValueError("Server name '%s' contains invalid characters" % ( + server_name, + )) + + return host, port + + def matrix_federation_endpoint(reactor, destination, ssl_context_factory=None, timeout=None): """Construct an endpoint for the given matrix destination. |