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JWT OIDC secrets for Sign in with Apple (#9549)

Browse source 
Apple had to be special. They want a client secret which is generated from an EC key.

Fixes #9220. Also fixes #9212 while I'm here.
This commit is contained in:
Richard van der Hoff 2021-03-09 15:03:37 +00:00 committed by GitHub
parent 9cd18cc588
commit eaada74075
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11 changed files with 444 additions and 47 deletions
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7
MANIFEST.in
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@ -20,9 +20,10 @@ recursive-include scripts *
recursive-include scripts-dev *
recursive-include synapse *.pyi
recursive-include tests *.py
include tests/http/ca.crt
include tests/http/ca.key
include tests/http/server.key
recursive-include tests *.pem
recursive-include tests *.p8
recursive-include tests *.crt
recursive-include tests *.key
recursive-include synapse/res *
recursive-include synapse/static *.css

1
changelog.d/9549.feature Normal file
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@ -0,0 +1 @@
Add support for generating JSON Web Tokens dynamically for use as OIDC client secrets.

42
docs/openid.md
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@ -386,7 +386,7 @@ oidc_providers:
config:
subject_claim: "id"
localpart_template: "{{ user.login }}"
display_name_template: "{{ user.full_name }}"
display_name_template: "{{ user.full_name }}"
```
### XWiki
@ -401,8 +401,7 @@ oidc_providers:
idp_name: "XWiki"
issuer: "https://myxwikihost/xwiki/oidc/"
client_id: "your-client-id" # TO BE FILLED
# Needed until https://github.com/matrix-org/synapse/issues/9212 is fixed
client_secret: "dontcare"
client_auth_method: none
scopes: ["openid", "profile"]
user_profile_method: "userinfo_endpoint"
user_mapping_provider:
@ -410,3 +409,40 @@ oidc_providers:
localpart_template: "{{ user.preferred_username }}"
display_name_template: "{{ user.name }}"
```
## Apple
Configuring "Sign in with Apple" (SiWA) requires an Apple Developer account.
You will need to create a new "Services ID" for SiWA, and create and download a
private key with "SiWA" enabled.
As well as the private key file, you will need:
* Client ID: the "identifier" you gave the "Services ID"
* Team ID: a 10-character ID associated with your developer account.
* Key ID: the 10-character identifier for the key.
https://help.apple.com/developer-account/?lang=en#/dev77c875b7e has more
documentation on setting up SiWA.
The synapse config will look like this:
```yaml
- idp_id: apple
idp_name: Apple
issuer: "https://appleid.apple.com"
client_id: "your-client-id" # Set to the "identifier" for your "ServicesID"
client_auth_method: "client_secret_post"
client_secret_jwt_key:
key_file: "/path/to/AuthKey_KEYIDCODE.p8" # point to your key file
jwt_header:
alg: ES256
kid: "KEYIDCODE" # Set to the 10-char Key ID
jwt_payload:
iss: TEAMIDCODE # Set to the 10-char Team ID
scopes: ["name", "email", "openid"]
authorization_endpoint: https://appleid.apple.com/auth/authorize?response_mode=form_post
user_mapping_provider:
config:
email_template: "{{ user.email }}"
```

21
docs/sample_config.yaml
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@ -1779,7 +1779,26 @@ saml2_config:
#
# client_id: Required. oauth2 client id to use.
#
# client_secret: Required. oauth2 client secret to use.
# client_secret: oauth2 client secret to use. May be omitted if
# client_secret_jwt_key is given, or if client_auth_method is 'none'.
#
# client_secret_jwt_key: Alternative to client_secret: details of a key used
# to create a JSON Web Token to be used as an OAuth2 client secret. If
# given, must be a dictionary with the following properties:
#
# key: a pem-encoded signing key. Must be a suitable key for the
# algorithm specified. Required unless 'key_file' is given.
#
# key_file: the path to file containing a pem-encoded signing key file.
# Required unless 'key' is given.
#
# jwt_header: a dictionary giving properties to include in the JWT
# header. Must include the key 'alg', giving the algorithm used to
# sign the JWT, such as "ES256", using the JWA identifiers in
# RFC7518.
#
# jwt_payload: an optional dictionary giving properties to include in
# the JWT payload. Normally this should include an 'iss' key.
#
# client_auth_method: auth method to use when exchanging the token. Valid
# values are 'client_secret_basic' (default), 'client_secret_post' and

38
synapse/config/_base.py
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@ -212,9 +212,8 @@ class Config:
@classmethod
def read_file(cls, file_path, config_name):
cls.check_file(file_path, config_name)
with open(file_path) as file_stream:
return file_stream.read()
"""Deprecated: call read_file directly"""
return read_file(file_path, (config_name,))
def read_template(self, filename: str) -> jinja2.Template:
"""Load a template file from disk.
@ -894,4 +893,35 @@ class RoutableShardedWorkerHandlingConfig(ShardedWorkerHandlingConfig):
return self._get_instance(key)
__all__ = ["Config", "RootConfig", "ShardedWorkerHandlingConfig"]
def read_file(file_path: Any, config_path: Iterable[str]) -> str:
"""Check the given file exists, and read it into a string
If it does not, emit an error indicating the problem
Args:
file_path: the file to be read
config_path: where in the configuration file_path came from, so that a useful
error can be emitted if it does not exist.
Returns:
content of the file.
Raises:
ConfigError if there is a problem reading the file.
"""
if not isinstance(file_path, str):
raise ConfigError("%r is not a string", config_path)
try:
os.stat(file_path)
with open(file_path) as file_stream:
return file_stream.read()
except OSError as e:
raise ConfigError("Error accessing file %r" % (file_path,), config_path) from e
__all__ = [
"Config",
"RootConfig",
"ShardedWorkerHandlingConfig",
"RoutableShardedWorkerHandlingConfig",
"read_file",
]

2
synapse/config/_base.pyi
View file

@ -152,3 +152,5 @@ class ShardedWorkerHandlingConfig:
class RoutableShardedWorkerHandlingConfig(ShardedWorkerHandlingConfig):
def get_instance(self, key: str) -> str: ...
def read_file(file_path: Any, config_path: Iterable[str]) -> str: ...

89
synapse/config/oidc_config.py
View file

@ -15,7 +15,7 @@
# limitations under the License.
from collections import Counter
from typing import Iterable, Optional, Tuple, Type
from typing import Iterable, Mapping, Optional, Tuple, Type
import attr
@ -25,7 +25,7 @@ from synapse.types import Collection, JsonDict
from synapse.util.module_loader import load_module
from synapse.util.stringutils import parse_and_validate_mxc_uri
from ._base import Config, ConfigError
from ._base import Config, ConfigError, read_file
DEFAULT_USER_MAPPING_PROVIDER = "synapse.handlers.oidc_handler.JinjaOidcMappingProvider"
@ -97,7 +97,26 @@ class OIDCConfig(Config):
#
# client_id: Required. oauth2 client id to use.
#
# client_secret: Required. oauth2 client secret to use.
# client_secret: oauth2 client secret to use. May be omitted if
# client_secret_jwt_key is given, or if client_auth_method is 'none'.
#
# client_secret_jwt_key: Alternative to client_secret: details of a key used
# to create a JSON Web Token to be used as an OAuth2 client secret. If
# given, must be a dictionary with the following properties:
#
# key: a pem-encoded signing key. Must be a suitable key for the
# algorithm specified. Required unless 'key_file' is given.
#
# key_file: the path to file containing a pem-encoded signing key file.
# Required unless 'key' is given.
#
# jwt_header: a dictionary giving properties to include in the JWT
# header. Must include the key 'alg', giving the algorithm used to
# sign the JWT, such as "ES256", using the JWA identifiers in
# RFC7518.
#
# jwt_payload: an optional dictionary giving properties to include in
# the JWT payload. Normally this should include an 'iss' key.
#
# client_auth_method: auth method to use when exchanging the token. Valid
# values are 'client_secret_basic' (default), 'client_secret_post' and
@ -240,7 +259,7 @@ class OIDCConfig(Config):
# jsonschema definition of the configuration settings for an oidc identity provider
OIDC_PROVIDER_CONFIG_SCHEMA = {
"type": "object",
"required": ["issuer", "client_id", "client_secret"],
"required": ["issuer", "client_id"],
"properties": {
"idp_id": {
"type": "string",
@ -262,6 +281,30 @@ OIDC_PROVIDER_CONFIG_SCHEMA = {
"issuer": {"type": "string"},
"client_id": {"type": "string"},
"client_secret": {"type": "string"},
"client_secret_jwt_key": {
"type": "object",
"required": ["jwt_header"],
"oneOf": [
{"required": ["key"]},
{"required": ["key_file"]},
],
"properties": {
"key": {"type": "string"},
"key_file": {"type": "string"},
"jwt_header": {
"type": "object",
"required": ["alg"],
"properties": {
"alg": {"type": "string"},
},
"additionalProperties": {"type": "string"},
},
"jwt_payload": {
"type": "object",
"additionalProperties": {"type": "string"},
},
},
},
"client_auth_method": {
"type": "string",
# the following list is the same as the keys of
@ -404,6 +447,20 @@ def _parse_oidc_config_dict(
"idp_icon must be a valid MXC URI", config_path + ("idp_icon",)
) from e
client_secret_jwt_key_config = oidc_config.get("client_secret_jwt_key")
client_secret_jwt_key = None # type: Optional[OidcProviderClientSecretJwtKey]
if client_secret_jwt_key_config is not None:
keyfile = client_secret_jwt_key_config.get("key_file")
if keyfile:
key = read_file(keyfile, config_path + ("client_secret_jwt_key",))
else:
key = client_secret_jwt_key_config["key"]
client_secret_jwt_key = OidcProviderClientSecretJwtKey(
key=key,
jwt_header=client_secret_jwt_key_config["jwt_header"],
jwt_payload=client_secret_jwt_key_config.get("jwt_payload", {}),
)
return OidcProviderConfig(
idp_id=idp_id,
idp_name=oidc_config.get("idp_name", "OIDC"),
@ -412,7 +469,8 @@ def _parse_oidc_config_dict(
discover=oidc_config.get("discover", True),
issuer=oidc_config["issuer"],
client_id=oidc_config["client_id"],
client_secret=oidc_config["client_secret"],
client_secret=oidc_config.get("client_secret"),
client_secret_jwt_key=client_secret_jwt_key,
client_auth_method=oidc_config.get("client_auth_method", "client_secret_basic"),
scopes=oidc_config.get("scopes", ["openid"]),
authorization_endpoint=oidc_config.get("authorization_endpoint"),
@ -427,6 +485,18 @@ def _parse_oidc_config_dict(
)
@attr.s(slots=True, frozen=True)
class OidcProviderClientSecretJwtKey:
# a pem-encoded signing key
key = attr.ib(type=str)
# properties to include in the JWT header
jwt_header = attr.ib(type=Mapping[str, str])
# properties to include in the JWT payload.
jwt_payload = attr.ib(type=Mapping[str, str])
@attr.s(slots=True, frozen=True)
class OidcProviderConfig:
# a unique identifier for this identity provider. Used in the 'user_external_ids'
@ -452,8 +522,13 @@ class OidcProviderConfig:
# oauth2 client id to use
client_id = attr.ib(type=str)
# oauth2 client secret to use
client_secret = attr.ib(type=str)
# oauth2 client secret to use. if `None`, use client_secret_jwt_key to generate
# a secret.
client_secret = attr.ib(type=Optional[str])
# key to use to construct a JWT to use as a client secret. May be `None` if
# `client_secret` is set.
client_secret_jwt_key = attr.ib(type=Optional[OidcProviderClientSecretJwtKey])
# auth method to use when exchanging the token.
# Valid values are 'client_secret_basic', 'client_secret_post' and

101
synapse/handlers/oidc_handler.py
View file

@ -1,5 +1,6 @@
# -*- coding: utf-8 -*-
# Copyright 2020 Quentin Gliech
# Copyright 2021 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.
@ -14,13 +15,13 @@
# limitations under the License.
import inspect
import logging
from typing import TYPE_CHECKING, Dict, Generic, List, Optional, TypeVar
from typing import TYPE_CHECKING, Dict, Generic, List, Optional, TypeVar, Union
from urllib.parse import urlencode
import attr
import pymacaroons
from authlib.common.security import generate_token
from authlib.jose import JsonWebToken
from authlib.jose import JsonWebToken, jwt
from authlib.oauth2.auth import ClientAuth
from authlib.oauth2.rfc6749.parameters import prepare_grant_uri
from authlib.oidc.core import CodeIDToken, ImplicitIDToken, UserInfo
@ -35,12 +36,15 @@ from typing_extensions import TypedDict
from twisted.web.client import readBody
from synapse.config import ConfigError
from synapse.config.oidc_config import OidcProviderConfig
from synapse.config.oidc_config import (
OidcProviderClientSecretJwtKey,
OidcProviderConfig,
)
from synapse.handlers.sso import MappingException, UserAttributes
from synapse.http.site import SynapseRequest
from synapse.logging.context import make_deferred_yieldable
from synapse.types import JsonDict, UserID, map_username_to_mxid_localpart
from synapse.util import json_decoder
from synapse.util import Clock, json_decoder
from synapse.util.caches.cached_call import RetryOnExceptionCachedCall
from synapse.util.macaroons import get_value_from_macaroon, satisfy_expiry
@ -276,9 +280,21 @@ class OidcProvider:
self._scopes = provider.scopes
self._user_profile_method = provider.user_profile_method
client_secret = None # type: Union[None, str, JwtClientSecret]
if provider.client_secret:
client_secret = provider.client_secret
elif provider.client_secret_jwt_key:
client_secret = JwtClientSecret(
provider.client_secret_jwt_key,
provider.client_id,
provider.issuer,
hs.get_clock(),
)
self._client_auth = ClientAuth(
provider.client_id,
provider.client_secret,
client_secret,
provider.client_auth_method,
) # type: ClientAuth
self._client_auth_method = provider.client_auth_method
@ -977,6 +993,81 @@ class OidcProvider:
return str(remote_user_id)
# number of seconds a newly-generated client secret should be valid for
CLIENT_SECRET_VALIDITY_SECONDS = 3600
# minimum remaining validity on a client secret before we should generate a new one
CLIENT_SECRET_MIN_VALIDITY_SECONDS = 600
class JwtClientSecret:
"""A class which generates a new client secret on demand, based on a JWK
This implementation is designed to comply with the requirements for Apple Sign in:
https://developer.apple.com/documentation/sign_in_with_apple/generate_and_validate_tokens#3262048
It looks like those requirements are based on https://tools.ietf.org/html/rfc7523,
but it's worth noting that we still put the generated secret in the "client_secret"
field (or rather, whereever client_auth_method puts it) rather than in a
client_assertion field in the body as that RFC seems to require.
"""
def __init__(
self,
key: OidcProviderClientSecretJwtKey,
oauth_client_id: str,
oauth_issuer: str,
clock: Clock,
):
self._key = key
self._oauth_client_id = oauth_client_id
self._oauth_issuer = oauth_issuer
self._clock = clock
self._cached_secret = b""
self._cached_secret_replacement_time = 0
def __str__(self):
# if client_auth_method is client_secret_basic, then ClientAuth.prepare calls
# encode_client_secret_basic, which calls "{}".format(secret), which ends up
# here.
return self._get_secret().decode("ascii")
def __bytes__(self):
# if client_auth_method is client_secret_post, then ClientAuth.prepare calls
# encode_client_secret_post, which ends up here.
return self._get_secret()
def _get_secret(self) -> bytes:
now = self._clock.time()
# if we have enough validity on our existing secret, use it
if now < self._cached_secret_replacement_time:
return self._cached_secret
issued_at = int(now)
expires_at = issued_at + CLIENT_SECRET_VALIDITY_SECONDS
# we copy the configured header because jwt.encode modifies it.
header = dict(self._key.jwt_header)
# see https://tools.ietf.org/html/rfc7523#section-3
payload = {
"sub": self._oauth_client_id,
"aud": self._oauth_issuer,
"iat": issued_at,
"exp": expires_at,
**self._key.jwt_payload,
}
logger.info(
"Generating new JWT for %s: %s %s", self._oauth_issuer, header, payload
)
self._cached_secret = jwt.encode(header, payload, self._key.key)
self._cached_secret_replacement_time = (
expires_at - CLIENT_SECRET_MIN_VALIDITY_SECONDS
)
return self._cached_secret
class OidcSessionTokenGenerator:
"""Methods for generating and checking OIDC Session cookies."""

5
tests/handlers/oidc_test_key.p8 Normal file
View file

@ -0,0 +1,5 @@
-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQgrHMvFcFjFhei6gHp
Gfy4C8+6z7634MZbC7SSx4a17GahRANCAATp0YxEzGUXuqszggiFxczDdPgDpCJA
P18rRuN7FLwZDuzYQPb8zVd8eGh4BqxjiVocICnVWyaSWD96N00I96SW
-----END PRIVATE KEY-----

4
tests/handlers/oidc_test_key.pub.pem Normal file
View file

@ -0,0 +1,4 @@
-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAE6dGMRMxlF7qrM4IIhcXMw3T4A6Qi
QD9fK0bjexS8GQ7s2ED2/M1XfHhoeAasY4laHCAp1Vsmklg/ejdNCPeklg==
-----END PUBLIC KEY-----

181
tests/handlers/test_oidc.py
View file

@ -13,6 +13,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
import json
import os
from urllib.parse import parse_qs, urlparse
from mock import ANY, Mock, patch
@ -50,7 +51,18 @@ WELL_KNOWN = ISSUER + ".well-known/openid-configuration"
JWKS_URI = ISSUER + ".well-known/jwks.json"
# config for common cases
COMMON_CONFIG = {
DEFAULT_CONFIG = {
"enabled": True,
"client_id": CLIENT_ID,
"client_secret": CLIENT_SECRET,
"issuer": ISSUER,
"scopes": SCOPES,
"user_mapping_provider": {"module": __name__ + ".TestMappingProvider"},
}
# extends the default config with explicit OAuth2 endpoints instead of using discovery
EXPLICIT_ENDPOINT_CONFIG = {
**DEFAULT_CONFIG,
"discover": False,
"authorization_endpoint": AUTHORIZATION_ENDPOINT,
"token_endpoint": TOKEN_ENDPOINT,
@ -107,6 +119,32 @@ async def get_json(url):
return {"keys": []}
def _key_file_path() -> str:
"""path to a file containing the private half of a test key"""
# this key was generated with:
# openssl ecparam -name prime256v1 -genkey -noout |
# openssl pkcs8 -topk8 -nocrypt -out oidc_test_key.p8
#
# we use PKCS8 rather than SEC-1 (which is what openssl ecparam spits out), because
# that's what Apple use, and we want to be sure that we work with Apple's keys.
#
# (For the record: both PKCS8 and SEC-1 specify (different) ways of representing
# keys using ASN.1. Both are then typically formatted using PEM, which says: use the
# base64-encoded DER encoding of ASN.1, with headers and footers. But we don't
# really need to care about any of that.)
return os.path.join(os.path.dirname(__file__), "oidc_test_key.p8")
def _public_key_file_path() -> str:
"""path to a file containing the public half of a test key"""
# this was generated with:
# openssl ec -in oidc_test_key.p8 -pubout -out oidc_test_key.pub.pem
#
# See above about where oidc_test_key.p8 came from
return os.path.join(os.path.dirname(__file__), "oidc_test_key.pub.pem")
class OidcHandlerTestCase(HomeserverTestCase):
if not HAS_OIDC:
skip = "requires OIDC"
@ -114,20 +152,6 @@ class OidcHandlerTestCase(HomeserverTestCase):
def default_config(self):
config = super().default_config()
config["public_baseurl"] = BASE_URL
oidc_config = {
"enabled": True,
"client_id": CLIENT_ID,
"client_secret": CLIENT_SECRET,
"issuer": ISSUER,
"scopes": SCOPES,
"user_mapping_provider": {"module": __name__ + ".TestMappingProvider"},
}
# Update this config with what's in the default config so that
# override_config works as expected.
oidc_config.update(config.get("oidc_config", {}))
config["oidc_config"] = oidc_config
return config
def make_homeserver(self, reactor, clock):
@ -170,13 +194,14 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.render_error.reset_mock()
return args
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_config(self):
"""Basic config correctly sets up the callback URL and client auth correctly."""
self.assertEqual(self.provider._callback_url, CALLBACK_URL)
self.assertEqual(self.provider._client_auth.client_id, CLIENT_ID)
self.assertEqual(self.provider._client_auth.client_secret, CLIENT_SECRET)
@override_config({"oidc_config": {"discover": True}})
@override_config({"oidc_config": {**DEFAULT_CONFIG, "discover": True}})
def test_discovery(self):
"""The handler should discover the endpoints from OIDC discovery document."""
# This would throw if some metadata were invalid
@ -195,13 +220,13 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.get_success(self.provider.load_metadata())
self.http_client.get_json.assert_not_called()
@override_config({"oidc_config": COMMON_CONFIG})
@override_config({"oidc_config": EXPLICIT_ENDPOINT_CONFIG})
def test_no_discovery(self):
"""When discovery is disabled, it should not try to load from discovery document."""
self.get_success(self.provider.load_metadata())
self.http_client.get_json.assert_not_called()
@override_config({"oidc_config": COMMON_CONFIG})
@override_config({"oidc_config": EXPLICIT_ENDPOINT_CONFIG})
def test_load_jwks(self):
"""JWKS loading is done once (then cached) if used."""
jwks = self.get_success(self.provider.load_jwks())
@ -236,6 +261,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.http_client.get_json.assert_not_called()
self.assertEqual(jwks, {"keys": []})
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_validate_config(self):
"""Provider metadatas are extensively validated."""
h = self.provider
@ -318,13 +344,14 @@ class OidcHandlerTestCase(HomeserverTestCase):
# Shouldn't raise with a valid userinfo, even without jwks
force_load_metadata()
@override_config({"oidc_config": {"skip_verification": True}})
@override_config({"oidc_config": {**DEFAULT_CONFIG, "skip_verification": True}})
def test_skip_verification(self):
"""Provider metadata validation can be disabled by config."""
with self.metadata_edit({"issuer": "http://insecure"}):
# This should not throw
get_awaitable_result(self.provider.load_metadata())
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_redirect_request(self):
"""The redirect request has the right arguments & generates a valid session cookie."""
req = Mock(spec=["cookies"])
@ -368,6 +395,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.assertEqual(params["nonce"], [nonce])
self.assertEqual(redirect, "http://client/redirect")
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_callback_error(self):
"""Errors from the provider returned in the callback are displayed."""
request = Mock(args={})
@ -379,6 +407,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.get_success(self.handler.handle_oidc_callback(request))
self.assertRenderedError("invalid_client", "some description")
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_callback(self):
"""Code callback works and display errors if something went wrong.
@ -480,6 +509,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.get_success(self.handler.handle_oidc_callback(request))
self.assertRenderedError("invalid_request")
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_callback_session(self):
"""The callback verifies the session presence and validity"""
request = Mock(spec=["args", "getCookie", "cookies"])
@ -522,7 +552,9 @@ class OidcHandlerTestCase(HomeserverTestCase):
self.get_success(self.handler.handle_oidc_callback(request))
self.assertRenderedError("invalid_request")
@override_config({"oidc_config": {"client_auth_method": "client_secret_post"}})
@override_config(
{"oidc_config": {**DEFAULT_CONFIG, "client_auth_method": "client_secret_post"}}
)
def test_exchange_code(self):
"""Code exchange behaves correctly and handles various error scenarios."""
token = {"type": "bearer"}
@ -607,9 +639,105 @@ class OidcHandlerTestCase(HomeserverTestCase):
@override_config(
{
"oidc_config": {
"enabled": True,
"client_id": CLIENT_ID,
"issuer": ISSUER,
"client_auth_method": "client_secret_post",
"client_secret_jwt_key": {
"key_file": _key_file_path(),
"jwt_header": {"alg": "ES256", "kid": "ABC789"},
"jwt_payload": {"iss": "DEFGHI"},
},
}
}
)
def test_exchange_code_jwt_key(self):
"""Test that code exchange works with a JWK client secret."""
from authlib.jose import jwt
token = {"type": "bearer"}
self.http_client.request = simple_async_mock(
return_value=FakeResponse(
code=200, phrase=b"OK", body=json.dumps(token).encode("utf-8")
)
)
code = "code"
# advance the clock a bit before we start, so we aren't working with zero
# timestamps.
self.reactor.advance(1000)
start_time = self.reactor.seconds()
ret = self.get_success(self.provider._exchange_code(code))
self.assertEqual(ret, token)
# the request should have hit the token endpoint
kwargs = self.http_client.request.call_args[1]
self.assertEqual(kwargs["method"], "POST")
self.assertEqual(kwargs["uri"], TOKEN_ENDPOINT)
# the client secret provided to the should be a jwt which can be checked with
# the public key
args = parse_qs(kwargs["data"].decode("utf-8"))
secret = args["client_secret"][0]
with open(_public_key_file_path()) as f:
key = f.read()
claims = jwt.decode(secret, key)
self.assertEqual(claims.header["kid"], "ABC789")
self.assertEqual(claims["aud"], ISSUER)
self.assertEqual(claims["iss"], "DEFGHI")
self.assertEqual(claims["sub"], CLIENT_ID)
self.assertEqual(claims["iat"], start_time)
self.assertGreater(claims["exp"], start_time)
# check the rest of the POSTed data
self.assertEqual(args["grant_type"], ["authorization_code"])
self.assertEqual(args["code"], [code])
self.assertEqual(args["client_id"], [CLIENT_ID])
self.assertEqual(args["redirect_uri"], [CALLBACK_URL])
@override_config(
{
"oidc_config": {
"enabled": True,
"client_id": CLIENT_ID,
"issuer": ISSUER,
"client_auth_method": "none",
}
}
)
def test_exchange_code_no_auth(self):
"""Test that code exchange works with no client secret."""
token = {"type": "bearer"}
self.http_client.request = simple_async_mock(
return_value=FakeResponse(
code=200, phrase=b"OK", body=json.dumps(token).encode("utf-8")
)
)
code = "code"
ret = self.get_success(self.provider._exchange_code(code))
self.assertEqual(ret, token)
# the request should have hit the token endpoint
kwargs = self.http_client.request.call_args[1]
self.assertEqual(kwargs["method"], "POST")
self.assertEqual(kwargs["uri"], TOKEN_ENDPOINT)
# check the POSTed data
args = parse_qs(kwargs["data"].decode("utf-8"))
self.assertEqual(args["grant_type"], ["authorization_code"])
self.assertEqual(args["code"], [code])
self.assertEqual(args["client_id"], [CLIENT_ID])
self.assertEqual(args["redirect_uri"], [CALLBACK_URL])
@override_config(
{
"oidc_config": {
**DEFAULT_CONFIG,
"user_mapping_provider": {
"module": __name__ + ".TestMappingProviderExtra"
}
},
}
}
)
@ -652,6 +780,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
new_user=True,
)
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_map_userinfo_to_user(self):
"""Ensure that mapping the userinfo returned from a provider to an MXID works properly."""
auth_handler = self.hs.get_auth_handler()
@ -692,7 +821,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
"Mapping provider does not support de-duplicating Matrix IDs",
)
@override_config({"oidc_config": {"allow_existing_users": True}})
@override_config({"oidc_config": {**DEFAULT_CONFIG, "allow_existing_users": True}})
def test_map_userinfo_to_existing_user(self):
"""Existing users can log in with OpenID Connect when allow_existing_users is True."""
store = self.hs.get_datastore()
@ -772,6 +901,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
"@TEST_USER_2:test", "oidc", ANY, ANY, None, new_user=False
)
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_map_userinfo_to_invalid_localpart(self):
"""If the mapping provider generates an invalid localpart it should be rejected."""
self.get_success(
@ -782,9 +912,10 @@ class OidcHandlerTestCase(HomeserverTestCase):
@override_config(
{
"oidc_config": {
**DEFAULT_CONFIG,
"user_mapping_provider": {
"module": __name__ + ".TestMappingProviderFailures"
}
},
}
}
)
@ -829,6 +960,7 @@ class OidcHandlerTestCase(HomeserverTestCase):
"mapping_error", "Unable to generate a Matrix ID from the SSO response"
)
@override_config({"oidc_config": DEFAULT_CONFIG})
def test_empty_localpart(self):
"""Attempts to map onto an empty localpart should be rejected."""
userinfo = {
@ -841,9 +973,10 @@ class OidcHandlerTestCase(HomeserverTestCase):
@override_config(
{
"oidc_config": {
**DEFAULT_CONFIG,
"user_mapping_provider": {
"config": {"localpart_template": "{{ user.username }}"}
}
},
}
}
)