update

id.saladeaula.digital/app/oauth2.py

@@ -1,5 +1,3 @@
-from os import rename
-
 from authlib.common.security import generate_token
 from authlib.common.urls import add_params_to_uri
 from authlib.jose import JsonWebKey
@@ -13,7 +11,6 @@ from authlib.oidc.core import OpenIDCode as OpenIDCode_
 from authlib.oidc.core import UserInfo
 from aws_lambda_powertools import Logger
 from aws_lambda_powertools.event_handler.api_gateway import Response
-from aws_lambda_powertools.event_handler.exceptions import NotFoundError
 from layercake.dateutils import now, ttl
 from layercake.dynamodb import (
     DynamoDBPersistenceLayer,
@@ -42,9 +39,11 @@ private_key = read_file_path('private.pem')
 private_jwk = JsonWebKey.import_key(private_key)
 
 
+# https://docs.authlib.org/en/v0.12/specs/rfc6750.html#authlib.oauth2.rfc6750.BearerToken.GRANT_TYPES_EXPIRES_IN
 GRANT_TYPES_EXPIRES_IN = {
     'authorization_code': 60 * 3,  # 3 minutes
-    'refresh_token': 3600,  # 1 hour
+    'refresh_token': 60 * 3,  # 3 minutes
+    # 'refresh_token': 3600,  # 1 hour
 }
 
 
@@ -83,6 +82,17 @@ class OpenIDCode(OpenIDCode_):
 
 
 class AuthorizationCodeGrant(grants.AuthorizationCodeGrant):
+    """The authorization code grant type is used to obtain both access tokens and
+    refresh tokens and is optimized for confidential clients.
+
+    Since this is a redirection-based flow, the client must be capable of
+    interacting with the resource owner’s user-agent (typically a web browser)
+    and capable of receiving incoming requests (via redirection) from the
+    authorization server:
+
+    - https://docs.authlib.org/en/v0.12/specs/rfc6749.html#authlib.oauth2.rfc6749.grants.AuthorizationCodeGrant
+    """
+
     TOKEN_ENDPOINT_AUTH_METHODS = [
         'client_secret_basic',
         'client_secret_post',
@@ -206,11 +216,6 @@ class TokenExchangeGrant(grants.BaseGrant):
         raise NotImplementedError()
 
 
-class RefreshTokenNotFoundError(NotFoundError):
-    def __init__(self, *_):
-        super().__init__('Refresh token not found')
-
-
 class RefreshTokenGrant(grants.RefreshTokenGrant):
     TOKEN_ENDPOINT_AUTH_METHODS = [
         'client_secret_basic',
@@ -221,17 +226,22 @@ class RefreshTokenGrant(grants.RefreshTokenGrant):
     # The authorization server MAY issue a new refresh token
     INCLUDE_NEW_REFRESH_TOKEN = True
 
-    def authenticate_refresh_token(self, refresh_token: str, **kwargs) -> TokenMixin:
+    def authenticate_refresh_token(self, refresh_token: str) -> TokenMixin:
         """Get token information with refresh_token string."""
         token = dyn.collection.get_item(
             KeyPair(
                 pk='OAUTH2#TOKEN',
                 sk=f'REFRESH_TOKEN#{refresh_token}',
             ),
-            exc_cls=RefreshTokenNotFoundError,
+            raise_on_error=False,
+            default=False,
         )
 
-        logger.info('Refresh token retrieved', token=token)
+        if not token:
+            logger.info('Refresh token not found ', refresh_token=token)
+            return None  # type: ignore
+
+        logger.info('Refresh token retrieved', refresh_token=token)
 
         return OAuth2Token(
             expires_in=int(token['expires_in']),
@@ -249,13 +259,14 @@ class RefreshTokenGrant(grants.RefreshTokenGrant):
         issuing a new refresh token to the client."""
 
         token = getattr(refresh_token, 'refresh_token', None)
-        logger.debug('Revoking old refresh token', refresh_token=token)
         user = refresh_token.get_user()
 
         if not token:
             return None
 
         with dyn.transact_writer() as transact:
+            logger.debug('Revoking old refresh token', refresh_token=token)
+
             transact.delete(
                 key=KeyPair(
                     pk='OAUTH2#TOKEN',
@@ -276,24 +287,24 @@ class RevocationEndpoint(rfc7009.RevocationEndpoint):
         token_string: str,
         token_type_hint: str | None = None,
     ):
-        t = dyn.collection.get_items(
+        result = dyn.collection.get_items(
             TransactKey('OAUTH2#TOKEN')
             + SortKey(sk=f'REFRESH_TOKEN#{token_string}', rename_key='refresh_token')
             + SortKey(sk=f'ACCESS_TOKEN#{token_string}', rename_key='access_token'),
             flatten_top=False,
         )
 
-        if not t:
+        if not result:
             return None
 
-        logger.debug('Tokens retrieved', result=t)
+        logger.debug('Tokens retrieved', result=result)
 
         if not token_type_hint:
             token_type_hint = (
-                'refresh_token' if 'refresh_token' in t else 'access_token'
+                'refresh_token' if 'refresh_token' in result else 'access_token'
             )
 
-        token = t[token_type_hint]
+        token = result[token_type_hint]
 
         return OAuth2Token(
             expires_in=int(token['expires_in']),
@@ -319,24 +330,25 @@ class RevocationEndpoint(rfc7009.RevocationEndpoint):
         - https://docs.authlib.org/en/latest/specs/rfc7009.html#authlib.oauth2.rfc7009.RevocationEndpoint.revoke_token
         """
         user_id = token.user['id']
-        r = dyn.collection.query(KeyPair(pk=user_id, sk='SESSION'))
+        result = dyn.collection.query(KeyPair(pk=user_id, sk='SESSION'))
 
         with dyn.transact_writer() as transact:
             # Revoke all sessions, access tokens, and refresh tokens
-            for x in r['items']:
+            for item in result['items']:
-                pk, sk = x['id'], x['sk']
+                pk, sk = item['id'], item['sk']
-                *_, kind, idx = sk.split('#')
+                # Key pattern: SESSION#{}#{}
+                *_, kind, token_ = sk.split('#')
 
                 transact.delete(key=KeyPair(pk, sk))
                 transact.delete(
                     key=KeyPair(
                         pk='SESSION',
-                        sk=idx,
+                        sk=token_,
                     )
                     if kind == 'SESSION'
                     else KeyPair(
                         pk='OAUTH2#TOKEN',
-                        sk=f'{kind}#{idx}',
+                        sk=f'{kind}#{token_}',
                     )
                 )
 

id.saladeaula.digital/app/routes/token.py

@@ -9,6 +9,4 @@ router = Router()
 
 @router.post('/token')
 def issue_token():
-    response = server.create_token_response(router.current_event)
+    return server.create_token_response(router.current_event)
-    logger.debug(getattr(response, 'body', None))
-    return response

id.saladeaula.digital/tests/routes/test_revoke.py

@@ -1,4 +1,5 @@
 import json
+import pprint
 from base64 import b64encode
 from http import HTTPMethod, HTTPStatus
 from urllib.parse import urlencode

id.saladeaula.digital/tests/routes/test_token.py

@@ -1,4 +1,5 @@
 import json
+import pprint
 from base64 import b64encode
 from http import HTTPMethod, HTTPStatus
 from urllib.parse import urlencode
@@ -125,3 +126,32 @@ def test_refresh_token(
     )
 
     assert len(r['items']) == 2
+
+
+def test_refresh_token_invalid_grant(
+    app,
+    seeds,
+    dynamodb_persistence_layer: DynamoDBPersistenceLayer,
+    http_api_proxy: HttpApiProxy,
+    lambda_context: LambdaContext,
+):
+    r = app.lambda_handler(
+        http_api_proxy(
+            raw_path='/token',
+            method=HTTPMethod.POST,
+            headers={
+                'Authorization': f'Basic {AUTH}',
+                'Content-Type': 'application/x-www-form-urlencoded',
+            },
+            body=urlencode(
+                {
+                    'grant_type': 'refresh_token',
+                    'refresh_token': '1234',
+                    'client_id': CLIENT_ID,
+                }
+            ),
+        ),
+        lambda_context,
+    )
+
+    assert r['statusCode'] == 400

id.saladeaula.digital/uv.lock

@@ -507,7 +507,7 @@ wheels = [
 
 [[package]]
 name = "layercake"
-version = "0.11.0"
+version = "0.11.1"
 source = { directory = "../layercake" }
 dependencies = [
     { name = "arnparse" },