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synapse/tests/handlers/test_oauth_delegation.py

664 lines
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Python

# Copyright 2022 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.
from http import HTTPStatus
from typing import Any, Dict, Union
from unittest.mock import ANY, Mock
from urllib.parse import parse_qs
from signedjson.key import (
encode_verify_key_base64,
generate_signing_key,
get_verify_key,
)
from signedjson.sign import sign_json
from twisted.test.proto_helpers import MemoryReactor
from synapse.api.errors import (
AuthError,
Codes,
InvalidClientTokenError,
OAuthInsufficientScopeError,
SynapseError,
)
from synapse.rest import admin
from synapse.rest.client import account, devices, keys, login, logout, register
from synapse.server import HomeServer
from synapse.types import JsonDict
from synapse.util import Clock
from tests.test_utils import FakeResponse, get_awaitable_result, simple_async_mock
from tests.unittest import HomeserverTestCase, skip_unless
from tests.utils import mock_getRawHeaders
try:
import authlib # noqa: F401
HAS_AUTHLIB = True
except ImportError:
HAS_AUTHLIB = False
# These are a few constants that are used as config parameters in the tests.
SERVER_NAME = "test"
ISSUER = "https://issuer/"
CLIENT_ID = "test-client-id"
CLIENT_SECRET = "test-client-secret"
BASE_URL = "https://synapse/"
SCOPES = ["openid"]
AUTHORIZATION_ENDPOINT = ISSUER + "authorize"
TOKEN_ENDPOINT = ISSUER + "token"
USERINFO_ENDPOINT = ISSUER + "userinfo"
WELL_KNOWN = ISSUER + ".well-known/openid-configuration"
JWKS_URI = ISSUER + ".well-known/jwks.json"
INTROSPECTION_ENDPOINT = ISSUER + "introspect"
SYNAPSE_ADMIN_SCOPE = "urn:synapse:admin:*"
MATRIX_USER_SCOPE = "urn:matrix:org.matrix.msc2967.client:api:*"
MATRIX_GUEST_SCOPE = "urn:matrix:org.matrix.msc2967.client:api:guest"
MATRIX_DEVICE_SCOPE_PREFIX = "urn:matrix:org.matrix.msc2967.client:device:"
DEVICE = "AABBCCDD"
MATRIX_DEVICE_SCOPE = MATRIX_DEVICE_SCOPE_PREFIX + DEVICE
SUBJECT = "abc-def-ghi"
USERNAME = "test-user"
USER_ID = "@" + USERNAME + ":" + SERVER_NAME
async def get_json(url: str) -> JsonDict:
# Mock get_json calls to handle jwks & oidc discovery endpoints
if url == WELL_KNOWN:
# Minimal discovery document, as defined in OpenID.Discovery
# https://openid.net/specs/openid-connect-discovery-1_0.html#ProviderMetadata
return {
"issuer": ISSUER,
"authorization_endpoint": AUTHORIZATION_ENDPOINT,
"token_endpoint": TOKEN_ENDPOINT,
"jwks_uri": JWKS_URI,
"userinfo_endpoint": USERINFO_ENDPOINT,
"introspection_endpoint": INTROSPECTION_ENDPOINT,
"response_types_supported": ["code"],
"subject_types_supported": ["public"],
"id_token_signing_alg_values_supported": ["RS256"],
}
elif url == JWKS_URI:
return {"keys": []}
return {}
@skip_unless(HAS_AUTHLIB, "requires authlib")
class MSC3861OAuthDelegation(HomeserverTestCase):
servlets = [
account.register_servlets,
devices.register_servlets,
keys.register_servlets,
register.register_servlets,
login.register_servlets,
logout.register_servlets,
admin.register_servlets,
]
def default_config(self) -> Dict[str, Any]:
config = super().default_config()
config["public_baseurl"] = BASE_URL
config["disable_registration"] = True
config["experimental_features"] = {
"msc3861": {
"enabled": True,
"issuer": ISSUER,
"client_id": CLIENT_ID,
"client_auth_method": "client_secret_post",
"client_secret": CLIENT_SECRET,
}
}
return config
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
self.http_client = Mock(spec=["get_json"])
self.http_client.get_json.side_effect = get_json
self.http_client.user_agent = b"Synapse Test"
hs = self.setup_test_homeserver(proxied_http_client=self.http_client)
self.auth = hs.get_auth()
return hs
def _assertParams(self) -> None:
"""Assert that the request parameters are correct."""
params = parse_qs(self.http_client.request.call_args[1]["data"].decode("utf-8"))
self.assertEqual(params["token"], ["mockAccessToken"])
self.assertEqual(params["client_id"], [CLIENT_ID])
self.assertEqual(params["client_secret"], [CLIENT_SECRET])
def test_inactive_token(self) -> None:
"""The handler should return a 403 where the token is inactive."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={"active": False},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), InvalidClientTokenError)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
def test_active_no_scope(self) -> None:
"""The handler should return a 403 where no scope is given."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={"active": True},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), InvalidClientTokenError)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
def test_active_user_no_subject(self) -> None:
"""The handler should return a 500 when no subject is present."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={"active": True, "scope": " ".join([MATRIX_USER_SCOPE])},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), InvalidClientTokenError)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
def test_active_no_user_scope(self) -> None:
"""The handler should return a 500 when no subject is present."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_DEVICE_SCOPE]),
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), InvalidClientTokenError)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
def test_active_admin_not_user(self) -> None:
"""The handler should raise when the scope has admin right but not user."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([SYNAPSE_ADMIN_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), InvalidClientTokenError)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
def test_active_admin(self) -> None:
"""The handler should return a requester with admin rights."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([SYNAPSE_ADMIN_SCOPE, MATRIX_USER_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = self.get_success(self.auth.get_user_by_req(request))
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
self.assertEqual(requester.is_guest, False)
self.assertEqual(requester.device_id, None)
self.assertEqual(
get_awaitable_result(self.auth.is_server_admin(requester)), True
)
def test_active_admin_highest_privilege(self) -> None:
"""The handler should resolve to the most permissive scope."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join(
[SYNAPSE_ADMIN_SCOPE, MATRIX_USER_SCOPE, MATRIX_GUEST_SCOPE]
),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = self.get_success(self.auth.get_user_by_req(request))
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
self.assertEqual(requester.is_guest, False)
self.assertEqual(requester.device_id, None)
self.assertEqual(
get_awaitable_result(self.auth.is_server_admin(requester)), True
)
def test_active_user(self) -> None:
"""The handler should return a requester with normal user rights."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_USER_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = self.get_success(self.auth.get_user_by_req(request))
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
self.assertEqual(requester.is_guest, False)
self.assertEqual(requester.device_id, None)
self.assertEqual(
get_awaitable_result(self.auth.is_server_admin(requester)), False
)
def test_active_user_with_device(self) -> None:
"""The handler should return a requester with normal user rights and a device ID."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_USER_SCOPE, MATRIX_DEVICE_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = self.get_success(self.auth.get_user_by_req(request))
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
self.assertEqual(requester.is_guest, False)
self.assertEqual(
get_awaitable_result(self.auth.is_server_admin(requester)), False
)
self.assertEqual(requester.device_id, DEVICE)
def test_multiple_devices(self) -> None:
"""The handler should raise an error if multiple devices are found in the scope."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join(
[
MATRIX_USER_SCOPE,
f"{MATRIX_DEVICE_SCOPE_PREFIX}AABBCC",
f"{MATRIX_DEVICE_SCOPE_PREFIX}DDEEFF",
]
),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
self.get_failure(self.auth.get_user_by_req(request), AuthError)
def test_active_guest_not_allowed(self) -> None:
"""The handler should return an insufficient scope error."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_GUEST_SCOPE, MATRIX_DEVICE_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
error = self.get_failure(
self.auth.get_user_by_req(request), OAuthInsufficientScopeError
)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(
getattr(error.value, "headers", {})["WWW-Authenticate"],
'Bearer error="insufficient_scope", scope="urn:matrix:org.matrix.msc2967.client:api:*"',
)
def test_active_guest_allowed(self) -> None:
"""The handler should return a requester with guest user rights and a device ID."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_GUEST_SCOPE, MATRIX_DEVICE_SCOPE]),
"username": USERNAME,
},
)
)
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
requester = self.get_success(
self.auth.get_user_by_req(request, allow_guest=True)
)
self.http_client.get_json.assert_called_once_with(WELL_KNOWN)
self.http_client.request.assert_called_once_with(
method="POST", uri=INTROSPECTION_ENDPOINT, data=ANY, headers=ANY
)
self._assertParams()
self.assertEqual(requester.user.to_string(), "@%s:%s" % (USERNAME, SERVER_NAME))
self.assertEqual(requester.is_guest, True)
self.assertEqual(
get_awaitable_result(self.auth.is_server_admin(requester)), False
)
self.assertEqual(requester.device_id, DEVICE)
def test_unavailable_introspection_endpoint(self) -> None:
"""The handler should return an internal server error."""
request = Mock(args={})
request.args[b"access_token"] = [b"mockAccessToken"]
request.requestHeaders.getRawHeaders = mock_getRawHeaders()
# The introspection endpoint is returning an error.
self.http_client.request = simple_async_mock(
return_value=FakeResponse(code=500, body=b"Internal Server Error")
)
error = self.get_failure(self.auth.get_user_by_req(request), SynapseError)
self.assertEqual(error.value.code, 503)
# The introspection endpoint request fails.
self.http_client.request = simple_async_mock(raises=Exception())
error = self.get_failure(self.auth.get_user_by_req(request), SynapseError)
self.assertEqual(error.value.code, 503)
# The introspection endpoint does not return a JSON object.
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200, payload=["this is an array", "not an object"]
)
)
error = self.get_failure(self.auth.get_user_by_req(request), SynapseError)
self.assertEqual(error.value.code, 503)
# The introspection endpoint does not return valid JSON.
self.http_client.request = simple_async_mock(
return_value=FakeResponse(code=200, body=b"this is not valid JSON")
)
error = self.get_failure(self.auth.get_user_by_req(request), SynapseError)
self.assertEqual(error.value.code, 503)
def make_device_keys(self, user_id: str, device_id: str) -> JsonDict:
# We only generate a master key to simplify the test.
master_signing_key = generate_signing_key(device_id)
master_verify_key = encode_verify_key_base64(get_verify_key(master_signing_key))
return {
"master_key": sign_json(
{
"user_id": user_id,
"usage": ["master"],
"keys": {"ed25519:" + master_verify_key: master_verify_key},
},
user_id,
master_signing_key,
),
}
def test_cross_signing(self) -> None:
"""Try uploading device keys with OAuth delegation enabled."""
self.http_client.request = simple_async_mock(
return_value=FakeResponse.json(
code=200,
payload={
"active": True,
"sub": SUBJECT,
"scope": " ".join([MATRIX_USER_SCOPE, MATRIX_DEVICE_SCOPE]),
"username": USERNAME,
},
)
)
keys_upload_body = self.make_device_keys(USER_ID, DEVICE)
channel = self.make_request(
"POST",
"/_matrix/client/v3/keys/device_signing/upload",
keys_upload_body,
access_token="mockAccessToken",
)
self.assertEqual(channel.code, 200, channel.json_body)
channel = self.make_request(
"POST",
"/_matrix/client/v3/keys/device_signing/upload",
keys_upload_body,
access_token="mockAccessToken",
)
self.assertEqual(channel.code, HTTPStatus.NOT_IMPLEMENTED, channel.json_body)
def expect_unauthorized(
self, method: str, path: str, content: Union[bytes, str, JsonDict] = ""
) -> None:
channel = self.make_request(method, path, content, shorthand=False)
self.assertEqual(channel.code, 401, channel.json_body)
def expect_unrecognized(
self, method: str, path: str, content: Union[bytes, str, JsonDict] = ""
) -> None:
channel = self.make_request(method, path, content)
self.assertEqual(channel.code, 404, channel.json_body)
self.assertEqual(
channel.json_body["errcode"], Codes.UNRECOGNIZED, channel.json_body
)
def test_uia_endpoints(self) -> None:
"""Test that endpoints that were removed in MSC2964 are no longer available."""
# This is just an endpoint that should remain visible (but requires auth):
self.expect_unauthorized("GET", "/_matrix/client/v3/devices")
# This remains usable, but will require a uia scope:
self.expect_unauthorized(
"POST", "/_matrix/client/v3/keys/device_signing/upload"
)
def test_3pid_endpoints(self) -> None:
"""Test that 3pid account management endpoints that were removed in MSC2964 are no longer available."""
# Remains and requires auth:
self.expect_unauthorized("GET", "/_matrix/client/v3/account/3pid")
self.expect_unauthorized(
"POST",
"/_matrix/client/v3/account/3pid/bind",
{
"client_secret": "foo",
"id_access_token": "bar",
"id_server": "foo",
"sid": "bar",
},
)
self.expect_unauthorized("POST", "/_matrix/client/v3/account/3pid/unbind", {})
# These are gone:
self.expect_unrecognized(
"POST", "/_matrix/client/v3/account/3pid"
) # deprecated
self.expect_unrecognized("POST", "/_matrix/client/v3/account/3pid/add")
self.expect_unrecognized("POST", "/_matrix/client/v3/account/3pid/delete")
self.expect_unrecognized(
"POST", "/_matrix/client/v3/account/3pid/email/requestToken"
)
self.expect_unrecognized(
"POST", "/_matrix/client/v3/account/3pid/msisdn/requestToken"
)
def test_account_management_endpoints_removed(self) -> None:
"""Test that account management endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized("POST", "/_matrix/client/v3/account/deactivate")
self.expect_unrecognized("POST", "/_matrix/client/v3/account/password")
self.expect_unrecognized(
"POST", "/_matrix/client/v3/account/password/email/requestToken"
)
self.expect_unrecognized(
"POST", "/_matrix/client/v3/account/password/msisdn/requestToken"
)
def test_registration_endpoints_removed(self) -> None:
"""Test that registration endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized(
"GET", "/_matrix/client/v1/register/m.login.registration_token/validity"
)
# This is still available for AS registrations
# self.expect_unrecognized("POST", "/_matrix/client/v3/register")
self.expect_unrecognized("GET", "/_matrix/client/v3/register/available")
self.expect_unrecognized(
"POST", "/_matrix/client/v3/register/email/requestToken"
)
self.expect_unrecognized(
"POST", "/_matrix/client/v3/register/msisdn/requestToken"
)
def test_session_management_endpoints_removed(self) -> None:
"""Test that session management endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized("GET", "/_matrix/client/v3/login")
self.expect_unrecognized("POST", "/_matrix/client/v3/login")
self.expect_unrecognized("GET", "/_matrix/client/v3/login/sso/redirect")
self.expect_unrecognized("POST", "/_matrix/client/v3/logout")
self.expect_unrecognized("POST", "/_matrix/client/v3/logout/all")
self.expect_unrecognized("POST", "/_matrix/client/v3/refresh")
self.expect_unrecognized("GET", "/_matrix/static/client/login")
def test_device_management_endpoints_removed(self) -> None:
"""Test that device management endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized("POST", "/_matrix/client/v3/delete_devices")
self.expect_unrecognized("DELETE", "/_matrix/client/v3/devices/{DEVICE}")
def test_openid_endpoints_removed(self) -> None:
"""Test that OpenID id_token endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized(
"POST", "/_matrix/client/v3/user/{USERNAME}/openid/request_token"
)
def test_admin_api_endpoints_removed(self) -> None:
"""Test that admin API endpoints that were removed in MSC2964 are no longer available."""
self.expect_unrecognized("GET", "/_synapse/admin/v1/registration_tokens")
self.expect_unrecognized("POST", "/_synapse/admin/v1/registration_tokens/new")
self.expect_unrecognized("GET", "/_synapse/admin/v1/registration_tokens/abcd")
self.expect_unrecognized("PUT", "/_synapse/admin/v1/registration_tokens/abcd")
self.expect_unrecognized(
"DELETE", "/_synapse/admin/v1/registration_tokens/abcd"
)
self.expect_unrecognized("POST", "/_synapse/admin/v1/reset_password/foo")
self.expect_unrecognized("POST", "/_synapse/admin/v1/users/foo/login")
self.expect_unrecognized("GET", "/_synapse/admin/v1/register")
self.expect_unrecognized("POST", "/_synapse/admin/v1/register")
self.expect_unrecognized("GET", "/_synapse/admin/v1/users/foo/admin")
self.expect_unrecognized("PUT", "/_synapse/admin/v1/users/foo/admin")
self.expect_unrecognized("POST", "/_synapse/admin/v1/account_validity/validity")