mirror of
https://git.anonymousland.org/anonymousland/synapse-product.git
synced 2024-12-29 19:46:13 -05:00
349 lines
12 KiB
Python
349 lines
12 KiB
Python
# Copyright 2022 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# 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 json
|
|
from typing import Any, ContextManager, Dict, List, Optional, Tuple
|
|
from unittest.mock import Mock, patch
|
|
from urllib.parse import parse_qs
|
|
|
|
import attr
|
|
|
|
from twisted.web.http_headers import Headers
|
|
from twisted.web.iweb import IResponse
|
|
|
|
from synapse.server import HomeServer
|
|
from synapse.util import Clock
|
|
from synapse.util.stringutils import random_string
|
|
|
|
from tests.test_utils import FakeResponse
|
|
|
|
|
|
@attr.s(slots=True, frozen=True, auto_attribs=True)
|
|
class FakeAuthorizationGrant:
|
|
userinfo: dict
|
|
client_id: str
|
|
redirect_uri: str
|
|
scope: str
|
|
nonce: Optional[str]
|
|
sid: Optional[str]
|
|
|
|
|
|
class FakeOidcServer:
|
|
"""A fake OpenID Connect Provider."""
|
|
|
|
# All methods here are mocks, so we can track when they are called, and override
|
|
# their values
|
|
request: Mock
|
|
get_jwks_handler: Mock
|
|
get_metadata_handler: Mock
|
|
get_userinfo_handler: Mock
|
|
post_token_handler: Mock
|
|
|
|
sid_counter: int = 0
|
|
|
|
def __init__(self, clock: Clock, issuer: str):
|
|
from authlib.jose import ECKey, KeySet
|
|
|
|
self._clock = clock
|
|
self.issuer = issuer
|
|
|
|
self.request = Mock(side_effect=self._request)
|
|
self.get_jwks_handler = Mock(side_effect=self._get_jwks_handler)
|
|
self.get_metadata_handler = Mock(side_effect=self._get_metadata_handler)
|
|
self.get_userinfo_handler = Mock(side_effect=self._get_userinfo_handler)
|
|
self.post_token_handler = Mock(side_effect=self._post_token_handler)
|
|
|
|
# A code -> grant mapping
|
|
self._authorization_grants: Dict[str, FakeAuthorizationGrant] = {}
|
|
# An access token -> grant mapping
|
|
self._sessions: Dict[str, FakeAuthorizationGrant] = {}
|
|
|
|
# We generate here an ECDSA key with the P-256 curve (ES256 algorithm) used for
|
|
# signing JWTs. ECDSA keys are really quick to generate compared to RSA.
|
|
self._key = ECKey.generate_key(crv="P-256", is_private=True)
|
|
self._jwks = KeySet([ECKey.import_key(self._key.as_pem(is_private=False))])
|
|
|
|
self._id_token_overrides: Dict[str, Any] = {}
|
|
|
|
def reset_mocks(self) -> None:
|
|
self.request.reset_mock()
|
|
self.get_jwks_handler.reset_mock()
|
|
self.get_metadata_handler.reset_mock()
|
|
self.get_userinfo_handler.reset_mock()
|
|
self.post_token_handler.reset_mock()
|
|
|
|
def patch_homeserver(self, hs: HomeServer) -> ContextManager[Mock]:
|
|
"""Patch the ``HomeServer`` HTTP client to handle requests through the ``FakeOidcServer``.
|
|
|
|
This patch should be used whenever the HS is expected to perform request to the
|
|
OIDC provider, e.g.::
|
|
|
|
fake_oidc_server = self.helper.fake_oidc_server()
|
|
with fake_oidc_server.patch_homeserver(hs):
|
|
self.make_request("GET", "/_matrix/client/r0/login/sso/redirect")
|
|
"""
|
|
return patch.object(hs.get_proxied_http_client(), "request", self.request)
|
|
|
|
@property
|
|
def authorization_endpoint(self) -> str:
|
|
return self.issuer + "authorize"
|
|
|
|
@property
|
|
def token_endpoint(self) -> str:
|
|
return self.issuer + "token"
|
|
|
|
@property
|
|
def userinfo_endpoint(self) -> str:
|
|
return self.issuer + "userinfo"
|
|
|
|
@property
|
|
def metadata_endpoint(self) -> str:
|
|
return self.issuer + ".well-known/openid-configuration"
|
|
|
|
@property
|
|
def jwks_uri(self) -> str:
|
|
return self.issuer + "jwks"
|
|
|
|
def get_metadata(self) -> dict:
|
|
return {
|
|
"issuer": self.issuer,
|
|
"authorization_endpoint": self.authorization_endpoint,
|
|
"token_endpoint": self.token_endpoint,
|
|
"jwks_uri": self.jwks_uri,
|
|
"userinfo_endpoint": self.userinfo_endpoint,
|
|
"response_types_supported": ["code"],
|
|
"subject_types_supported": ["public"],
|
|
"id_token_signing_alg_values_supported": ["ES256"],
|
|
}
|
|
|
|
def get_jwks(self) -> dict:
|
|
return self._jwks.as_dict()
|
|
|
|
def get_userinfo(self, access_token: str) -> Optional[dict]:
|
|
"""Given an access token, get the userinfo of the associated session."""
|
|
session = self._sessions.get(access_token, None)
|
|
if session is None:
|
|
return None
|
|
return session.userinfo
|
|
|
|
def _sign(self, payload: dict) -> str:
|
|
from authlib.jose import JsonWebSignature
|
|
|
|
jws = JsonWebSignature()
|
|
kid = self.get_jwks()["keys"][0]["kid"]
|
|
protected = {"alg": "ES256", "kid": kid}
|
|
json_payload = json.dumps(payload)
|
|
return jws.serialize_compact(protected, json_payload, self._key).decode("utf-8")
|
|
|
|
def generate_id_token(self, grant: FakeAuthorizationGrant) -> str:
|
|
now = int(self._clock.time())
|
|
id_token = {
|
|
**grant.userinfo,
|
|
"iss": self.issuer,
|
|
"aud": grant.client_id,
|
|
"iat": now,
|
|
"nbf": now,
|
|
"exp": now + 600,
|
|
}
|
|
|
|
if grant.nonce is not None:
|
|
id_token["nonce"] = grant.nonce
|
|
|
|
if grant.sid is not None:
|
|
id_token["sid"] = grant.sid
|
|
|
|
id_token.update(self._id_token_overrides)
|
|
|
|
return self._sign(id_token)
|
|
|
|
def generate_logout_token(self, grant: FakeAuthorizationGrant) -> str:
|
|
now = int(self._clock.time())
|
|
logout_token = {
|
|
"iss": self.issuer,
|
|
"aud": grant.client_id,
|
|
"iat": now,
|
|
"jti": random_string(10),
|
|
"events": {
|
|
"http://schemas.openid.net/event/backchannel-logout": {},
|
|
},
|
|
}
|
|
|
|
if grant.sid is not None:
|
|
logout_token["sid"] = grant.sid
|
|
|
|
if "sub" in grant.userinfo:
|
|
logout_token["sub"] = grant.userinfo["sub"]
|
|
|
|
return self._sign(logout_token)
|
|
|
|
def id_token_override(self, overrides: dict) -> ContextManager[dict]:
|
|
"""Temporarily patch the ID token generated by the token endpoint."""
|
|
return patch.object(self, "_id_token_overrides", overrides)
|
|
|
|
def start_authorization(
|
|
self,
|
|
client_id: str,
|
|
scope: str,
|
|
redirect_uri: str,
|
|
userinfo: dict,
|
|
nonce: Optional[str] = None,
|
|
with_sid: bool = False,
|
|
) -> Tuple[str, FakeAuthorizationGrant]:
|
|
"""Start an authorization request, and get back the code to use on the authorization endpoint."""
|
|
code = random_string(10)
|
|
sid = None
|
|
if with_sid:
|
|
sid = str(self.sid_counter)
|
|
self.sid_counter += 1
|
|
|
|
grant = FakeAuthorizationGrant(
|
|
userinfo=userinfo,
|
|
scope=scope,
|
|
redirect_uri=redirect_uri,
|
|
nonce=nonce,
|
|
client_id=client_id,
|
|
sid=sid,
|
|
)
|
|
self._authorization_grants[code] = grant
|
|
|
|
return code, grant
|
|
|
|
def exchange_code(self, code: str) -> Optional[Dict[str, Any]]:
|
|
grant = self._authorization_grants.pop(code, None)
|
|
if grant is None:
|
|
return None
|
|
|
|
access_token = random_string(10)
|
|
self._sessions[access_token] = grant
|
|
|
|
token = {
|
|
"token_type": "Bearer",
|
|
"access_token": access_token,
|
|
"expires_in": 3600,
|
|
"scope": grant.scope,
|
|
}
|
|
|
|
if "openid" in grant.scope:
|
|
token["id_token"] = self.generate_id_token(grant)
|
|
|
|
return dict(token)
|
|
|
|
def buggy_endpoint(
|
|
self,
|
|
*,
|
|
jwks: bool = False,
|
|
metadata: bool = False,
|
|
token: bool = False,
|
|
userinfo: bool = False,
|
|
) -> ContextManager[Dict[str, Mock]]:
|
|
"""A context which makes a set of endpoints return a 500 error.
|
|
|
|
Args:
|
|
jwks: If True, makes the JWKS endpoint return a 500 error.
|
|
metadata: If True, makes the OIDC Discovery endpoint return a 500 error.
|
|
token: If True, makes the token endpoint return a 500 error.
|
|
userinfo: If True, makes the userinfo endpoint return a 500 error.
|
|
"""
|
|
buggy = FakeResponse(code=500, body=b"Internal server error")
|
|
|
|
patches = {}
|
|
if jwks:
|
|
patches["get_jwks_handler"] = Mock(return_value=buggy)
|
|
if metadata:
|
|
patches["get_metadata_handler"] = Mock(return_value=buggy)
|
|
if token:
|
|
patches["post_token_handler"] = Mock(return_value=buggy)
|
|
if userinfo:
|
|
patches["get_userinfo_handler"] = Mock(return_value=buggy)
|
|
|
|
return patch.multiple(self, **patches)
|
|
|
|
async def _request(
|
|
self,
|
|
method: str,
|
|
uri: str,
|
|
data: Optional[bytes] = None,
|
|
headers: Optional[Headers] = None,
|
|
) -> IResponse:
|
|
"""The override of the SimpleHttpClient#request() method"""
|
|
access_token: Optional[str] = None
|
|
|
|
if headers is None:
|
|
headers = Headers()
|
|
|
|
# Try to find the access token in the headers if any
|
|
auth_headers = headers.getRawHeaders(b"Authorization")
|
|
if auth_headers:
|
|
parts = auth_headers[0].split(b" ")
|
|
if parts[0] == b"Bearer" and len(parts) == 2:
|
|
access_token = parts[1].decode("ascii")
|
|
|
|
if method == "POST":
|
|
# If the method is POST, assume it has an url-encoded body
|
|
if data is None or headers.getRawHeaders(b"Content-Type") != [
|
|
b"application/x-www-form-urlencoded"
|
|
]:
|
|
return FakeResponse.json(code=400, payload={"error": "invalid_request"})
|
|
|
|
params = parse_qs(data.decode("utf-8"))
|
|
|
|
if uri == self.token_endpoint:
|
|
# Even though this endpoint should be protected, this does not check
|
|
# for client authentication. We're not checking it for simplicity,
|
|
# and because client authentication is tested in other standalone tests.
|
|
return self.post_token_handler(params)
|
|
|
|
elif method == "GET":
|
|
if uri == self.jwks_uri:
|
|
return self.get_jwks_handler()
|
|
elif uri == self.metadata_endpoint:
|
|
return self.get_metadata_handler()
|
|
elif uri == self.userinfo_endpoint:
|
|
return self.get_userinfo_handler(access_token=access_token)
|
|
|
|
return FakeResponse(code=404, body=b"404 not found")
|
|
|
|
# Request handlers
|
|
def _get_jwks_handler(self) -> IResponse:
|
|
"""Handles requests to the JWKS URI."""
|
|
return FakeResponse.json(payload=self.get_jwks())
|
|
|
|
def _get_metadata_handler(self) -> IResponse:
|
|
"""Handles requests to the OIDC well-known document."""
|
|
return FakeResponse.json(payload=self.get_metadata())
|
|
|
|
def _get_userinfo_handler(self, access_token: Optional[str]) -> IResponse:
|
|
"""Handles requests to the userinfo endpoint."""
|
|
if access_token is None:
|
|
return FakeResponse(code=401)
|
|
user_info = self.get_userinfo(access_token)
|
|
if user_info is None:
|
|
return FakeResponse(code=401)
|
|
|
|
return FakeResponse.json(payload=user_info)
|
|
|
|
def _post_token_handler(self, params: Dict[str, List[str]]) -> IResponse:
|
|
"""Handles requests to the token endpoint."""
|
|
code = params.get("code", [])
|
|
|
|
if len(code) != 1:
|
|
return FakeResponse.json(code=400, payload={"error": "invalid_request"})
|
|
|
|
grant = self.exchange_code(code=code[0])
|
|
if grant is None:
|
|
return FakeResponse.json(code=400, payload={"error": "invalid_grant"})
|
|
|
|
return FakeResponse.json(payload=grant)
|