diff options
Diffstat (limited to '')
| -rw-r--r-- | changelog.d/11398.feature | 1 | ||||
| -rwxr-xr-x | scripts-dev/federation_client.py | 7 | ||||
| -rw-r--r-- | synapse/federation/transport/server/_base.py | 39 | ||||
| -rw-r--r-- | synapse/http/matrixfederationclient.py | 12 |
4 files changed, 48 insertions, 11 deletions
diff --git a/changelog.d/11398.feature b/changelog.d/11398.feature new file mode 100644 index 0000000000..a910f4da14 --- /dev/null +++ b/changelog.d/11398.feature @@ -0,0 +1 @@ +Implement [MSC3383](https://github.com/matrix-org/matrix-spec-proposals/pull/3383) for including the destination in server-to-server authentication headers. Contributed by @Bubu and @jcgruenhage for Famedly GmbH. diff --git a/scripts-dev/federation_client.py b/scripts-dev/federation_client.py index c72e19f61d..079d2f5ed0 100755 --- a/scripts-dev/federation_client.py +++ b/scripts-dev/federation_client.py @@ -124,7 +124,12 @@ def request( authorization_headers = [] for key, sig in signed_json["signatures"][origin_name].items(): - header = 'X-Matrix origin=%s,key="%s",sig="%s"' % (origin_name, key, sig) + header = 'X-Matrix origin=%s,key="%s",sig="%s",destination="%s"' % ( + origin_name, + key, + sig, + destination, + ) authorization_headers.append(header.encode("ascii")) print("Authorization: %s" % header, file=sys.stderr) diff --git a/synapse/federation/transport/server/_base.py b/synapse/federation/transport/server/_base.py index 2529dee613..d629a3ecb5 100644 --- a/synapse/federation/transport/server/_base.py +++ b/synapse/federation/transport/server/_base.py @@ -16,7 +16,8 @@ import functools import logging import re import time -from typing import TYPE_CHECKING, Any, Awaitable, Callable, Optional, Tuple, cast +from http import HTTPStatus +from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, Optional, Tuple, cast from synapse.api.errors import Codes, FederationDeniedError, SynapseError from synapse.api.urls import FEDERATION_V1_PREFIX @@ -86,15 +87,24 @@ class Authenticator: if not auth_headers: raise NoAuthenticationError( - 401, "Missing Authorization headers", Codes.UNAUTHORIZED + HTTPStatus.UNAUTHORIZED, + "Missing Authorization headers", + Codes.UNAUTHORIZED, ) for auth in auth_headers: if auth.startswith(b"X-Matrix"): - (origin, key, sig) = _parse_auth_header(auth) + (origin, key, sig, destination) = _parse_auth_header(auth) json_request["origin"] = origin json_request["signatures"].setdefault(origin, {})[key] = sig + # if the origin_server sent a destination along it needs to match our own server_name + if destination is not None and destination != self.server_name: + raise AuthenticationError( + HTTPStatus.UNAUTHORIZED, + "Destination mismatch in auth header", + Codes.UNAUTHORIZED, + ) if ( self.federation_domain_whitelist is not None and origin not in self.federation_domain_whitelist @@ -103,7 +113,9 @@ class Authenticator: if origin is None or not json_request["signatures"]: raise NoAuthenticationError( - 401, "Missing Authorization headers", Codes.UNAUTHORIZED + HTTPStatus.UNAUTHORIZED, + "Missing Authorization headers", + Codes.UNAUTHORIZED, ) await self.keyring.verify_json_for_server( @@ -142,13 +154,14 @@ class Authenticator: logger.exception("Error resetting retry timings on %s", origin) -def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str]: +def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str, Optional[str]]: """Parse an X-Matrix auth header Args: header_bytes: header value Returns: + origin, key id, signature, destination. origin, key id, signature. Raises: @@ -157,7 +170,9 @@ def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str]: try: header_str = header_bytes.decode("utf-8") params = header_str.split(" ")[1].split(",") - param_dict = {k: v for k, v in (kv.split("=", maxsplit=1) for kv in params)} + param_dict: Dict[str, str] = { + k: v for k, v in [param.split("=", maxsplit=1) for param in params] + } def strip_quotes(value: str) -> str: if value.startswith('"'): @@ -172,7 +187,15 @@ def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str]: key = strip_quotes(param_dict["key"]) sig = strip_quotes(param_dict["sig"]) - return origin, key, sig + + # get the destination server_name from the auth header if it exists + destination = param_dict.get("destination") + if destination is not None: + destination = strip_quotes(destination) + else: + destination = None + + return origin, key, sig, destination except Exception as e: logger.warning( "Error parsing auth header '%s': %s", @@ -180,7 +203,7 @@ def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str]: e, ) raise AuthenticationError( - 400, "Malformed Authorization header", Codes.UNAUTHORIZED + HTTPStatus.BAD_REQUEST, "Malformed Authorization header", Codes.UNAUTHORIZED ) diff --git a/synapse/http/matrixfederationclient.py b/synapse/http/matrixfederationclient.py index 5097b3ca57..e686445955 100644 --- a/synapse/http/matrixfederationclient.py +++ b/synapse/http/matrixfederationclient.py @@ -704,6 +704,9 @@ class MatrixFederationHttpClient: Returns: A list of headers to be added as "Authorization:" headers """ + if destination is None and destination_is is None: + raise ValueError("destination and destination_is cannot both be None!") + request: JsonDict = { "method": method.decode("ascii"), "uri": url_bytes.decode("ascii"), @@ -726,8 +729,13 @@ class MatrixFederationHttpClient: for key, sig in request["signatures"][self.server_name].items(): auth_headers.append( ( - 'X-Matrix origin=%s,key="%s",sig="%s"' - % (self.server_name, key, sig) + 'X-Matrix origin=%s,key="%s",sig="%s",destination="%s"' + % ( + self.server_name, + key, + sig, + request.get("destination") or request["destination_is"], + ) ).encode("ascii") ) return auth_headers |