prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  bug(auth): requests to the api with an invalid token receive a response status 500 instead of 401
  
  
  </issue>
  <code>
  [start of timed/authentication.py]
  1 import base64
  2 import functools
  3 import hashlib
  4 
  5 import requests
  6 from django.conf import settings
  7 from django.core.cache import cache
  8 from django.core.exceptions import SuspiciousOperation
  9 from django.utils.encoding import force_bytes
  10 from mozilla_django_oidc.auth import LOGGER, OIDCAuthenticationBackend
  11 
  12 
  13 class TimedOIDCAuthenticationBackend(OIDCAuthenticationBackend):
  14     def get_introspection(self, access_token, id_token, payload):
  15         """Return user details dictionary."""
  16 
  17         basic = base64.b64encode(
  18             f"{settings.OIDC_RP_INTROSPECT_CLIENT_ID}:{settings.OIDC_RP_INTROSPECT_CLIENT_SECRET}".encode(
  19                 "utf-8"
  20             )
  21         ).decode()
  22         headers = {
  23             "Authorization": f"Basic {basic}",
  24             "Content-Type": "application/x-www-form-urlencoded",
  25         }
  26         response = requests.post(
  27             settings.OIDC_OP_INTROSPECT_ENDPOINT,
  28             verify=settings.OIDC_VERIFY_SSL,
  29             headers=headers,
  30             data={"token": access_token},
  31         )
  32         response.raise_for_status()
  33         return response.json()
  34 
  35     def get_userinfo_or_introspection(self, access_token):
  36         try:
  37             claims = self.cached_request(
  38                 self.get_userinfo, access_token, "auth.userinfo"
  39             )
  40         except requests.HTTPError as e:
  41             if not (
  42                 e.response.status_code in [401, 403] and settings.OIDC_CHECK_INTROSPECT
  43             ):
  44                 raise e
  45 
  46             # check introspection if userinfo fails (confidental client)
  47             claims = self.cached_request(
  48                 self.get_introspection, access_token, "auth.introspection"
  49             )
  50             if "client_id" not in claims:
  51                 raise SuspiciousOperation("client_id not present in introspection")
  52 
  53         return claims
  54 
  55     def get_or_create_user(self, access_token, id_token, payload):
  56         """Verify claims and return user, otherwise raise an Exception."""
  57 
  58         claims = self.get_userinfo_or_introspection(access_token)
  59 
  60         users = self.filter_users_by_claims(claims)
  61 
  62         if len(users) == 1:
  63             user = users.get()
  64             self.update_user_from_claims(user, claims)
  65             return user
  66         elif settings.OIDC_CREATE_USER:
  67             return self.create_user(claims)
  68         else:
  69             LOGGER.debug(
  70                 "Login failed: No user with username %s found, and "
  71                 "OIDC_CREATE_USER is False",
  72                 self.get_username(claims),
  73             )
  74             return None
  75 
  76     def update_user_from_claims(self, user, claims):
  77         user.email = claims.get(settings.OIDC_EMAIL_CLAIM, "")
  78         user.first_name = claims.get(settings.OIDC_FIRSTNAME_CLAIM, "")
  79         user.last_name = claims.get(settings.OIDC_LASTNAME_CLAIM, "")
  80         user.save()
  81 
  82     def filter_users_by_claims(self, claims):
  83         username = self.get_username(claims)
  84         return self.UserModel.objects.filter(username__iexact=username)
  85 
  86     def cached_request(self, method, token, cache_prefix):
  87         token_hash = hashlib.sha256(force_bytes(token)).hexdigest()
  88 
  89         func = functools.partial(method, token, None, None)
  90 
  91         return cache.get_or_set(
  92             f"{cache_prefix}.{token_hash}",
  93             func,
  94             timeout=settings.OIDC_BEARER_TOKEN_REVALIDATION_TIME,
  95         )
  96 
  97     def create_user(self, claims):
  98         """Return object for a newly created user account."""
  99 
  100         username = self.get_username(claims)
  101         email = claims.get(settings.OIDC_EMAIL_CLAIM, "")
  102         first_name = claims.get(settings.OIDC_FIRSTNAME_CLAIM, "")
  103         last_name = claims.get(settings.OIDC_LASTNAME_CLAIM, "")
  104 
  105         return self.UserModel.objects.create(
  106             username=username, email=email, first_name=first_name, last_name=last_name
  107         )
  108 
  109     def get_username(self, claims):
  110         try:
  111             return claims[settings.OIDC_USERNAME_CLAIM]
  112         except KeyError:
  113             raise SuspiciousOperation("Couldn't find username claim")
  114
  [end of timed/authentication.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/timed/authentication.py b/timed/authentication.py
  --- a/timed/authentication.py
  +++ b/timed/authentication.py
  @@ -8,6 +8,7 @@
   from django.core.exceptions import SuspiciousOperation
   from django.utils.encoding import force_bytes
   from mozilla_django_oidc.auth import LOGGER, OIDCAuthenticationBackend
  +from rest_framework.exceptions import AuthenticationFailed
   
   
   class TimedOIDCAuthenticationBackend(OIDCAuthenticationBackend):
  @@ -37,20 +38,29 @@
               claims = self.cached_request(
                   self.get_userinfo, access_token, "auth.userinfo"
               )
  +            return claims
           except requests.HTTPError as e:
  -            if not (
  -                e.response.status_code in [401, 403] and settings.OIDC_CHECK_INTROSPECT
  -            ):
  +            if e.response.status_code not in [401, 403]:
                   raise e
  -
  -            # check introspection if userinfo fails (confidental client)
  -            claims = self.cached_request(
  -                self.get_introspection, access_token, "auth.introspection"
  -            )
  -            if "client_id" not in claims:
  -                raise SuspiciousOperation("client_id not present in introspection")
  -
  -        return claims
  +            if settings.OIDC_CHECK_INTROSPECT:
  +                try:
  +                    # check introspection if userinfo fails (confidential client)
  +                    claims = self.cached_request(
  +                        self.get_introspection, access_token, "auth.introspection"
  +                    )
  +                    if "client_id" not in claims:
  +                        raise SuspiciousOperation(
  +                            "client_id not present in introspection"
  +                        )
  +                    return claims
  +                except requests.HTTPError as e:
  +                    # if the authorization fails it's not a valid client or
  +                    # the token is expired and permission is denied.
  +                    # Handing on the 401 Client Error would be transformed into
  +                    # a 500 by Django's exception handling. But that's not what we want.
  +                    if e.response.status_code not in [401, 403]:  # pragma: no cover
  +                        raise e
  +            raise AuthenticationFailed()
   
       def get_or_create_user(self, access_token, id_token, payload):
           """Verify claims and return user, otherwise raise an Exception."""
  
verification_info: {"golden_diff": "diff --git a/timed/authentication.py b/timed/authentication.py\n--- a/timed/authentication.py\n+++ b/timed/authentication.py\n@@ -8,6 +8,7 @@\n from django.core.exceptions import SuspiciousOperation\n from django.utils.encoding import force_bytes\n from mozilla_django_oidc.auth import LOGGER, OIDCAuthenticationBackend\n+from rest_framework.exceptions import AuthenticationFailed\n \n \n class TimedOIDCAuthenticationBackend(OIDCAuthenticationBackend):\n@@ -37,20 +38,29 @@\n             claims = self.cached_request(\n                 self.get_userinfo, access_token, \"auth.userinfo\"\n             )\n+            return claims\n         except requests.HTTPError as e:\n-            if not (\n-                e.response.status_code in [401, 403] and settings.OIDC_CHECK_INTROSPECT\n-            ):\n+            if e.response.status_code not in [401, 403]:\n                 raise e\n-\n-            # check introspection if userinfo fails (confidental client)\n-            claims = self.cached_request(\n-                self.get_introspection, access_token, \"auth.introspection\"\n-            )\n-            if \"client_id\" not in claims:\n-                raise SuspiciousOperation(\"client_id not present in introspection\")\n-\n-        return claims\n+            if settings.OIDC_CHECK_INTROSPECT:\n+                try:\n+                    # check introspection if userinfo fails (confidential client)\n+                    claims = self.cached_request(\n+                        self.get_introspection, access_token, \"auth.introspection\"\n+                    )\n+                    if \"client_id\" not in claims:\n+                        raise SuspiciousOperation(\n+                            \"client_id not present in introspection\"\n+                        )\n+                    return claims\n+                except requests.HTTPError as e:\n+                    # if the authorization fails it's not a valid client or\n+                    # the token is expired and permission is denied.\n+                    # Handing on the 401 Client Error would be transformed into\n+                    # a 500 by Django's exception handling. But that's not what we want.\n+                    if e.response.status_code not in [401, 403]:  # pragma: no cover\n+                        raise e\n+            raise AuthenticationFailed()\n \n     def get_or_create_user(self, access_token, id_token, payload):\n         \"\"\"Verify claims and return user, otherwise raise an Exception.\"\"\"\n", "issue": "bug(auth): requests to the api with an invalid token receive a response status 500 instead of 401\n\n", "before_files": [{"content": "import base64\nimport functools\nimport hashlib\n\nimport requests\nfrom django.conf import settings\nfrom django.core.cache import cache\nfrom django.core.exceptions import SuspiciousOperation\nfrom django.utils.encoding import force_bytes\nfrom mozilla_django_oidc.auth import LOGGER, OIDCAuthenticationBackend\n\n\nclass TimedOIDCAuthenticationBackend(OIDCAuthenticationBackend):\n    def get_introspection(self, access_token, id_token, payload):\n        \"\"\"Return user details dictionary.\"\"\"\n\n        basic = base64.b64encode(\n            f\"{settings.OIDC_RP_INTROSPECT_CLIENT_ID}:{settings.OIDC_RP_INTROSPECT_CLIENT_SECRET}\".encode(\n                \"utf-8\"\n            )\n        ).decode()\n        headers = {\n            \"Authorization\": f\"Basic {basic}\",\n            \"Content-Type\": \"application/x-www-form-urlencoded\",\n        }\n        response = requests.post(\n            settings.OIDC_OP_INTROSPECT_ENDPOINT,\n            verify=settings.OIDC_VERIFY_SSL,\n            headers=headers,\n            data={\"token\": access_token},\n        )\n        response.raise_for_status()\n        return response.json()\n\n    def get_userinfo_or_introspection(self, access_token):\n        try:\n            claims = self.cached_request(\n                self.get_userinfo, access_token, \"auth.userinfo\"\n            )\n        except requests.HTTPError as e:\n            if not (\n                e.response.status_code in [401, 403] and settings.OIDC_CHECK_INTROSPECT\n            ):\n                raise e\n\n            # check introspection if userinfo fails (confidental client)\n            claims = self.cached_request(\n                self.get_introspection, access_token, \"auth.introspection\"\n            )\n            if \"client_id\" not in claims:\n                raise SuspiciousOperation(\"client_id not present in introspection\")\n\n        return claims\n\n    def get_or_create_user(self, access_token, id_token, payload):\n        \"\"\"Verify claims and return user, otherwise raise an Exception.\"\"\"\n\n        claims = self.get_userinfo_or_introspection(access_token)\n\n        users = self.filter_users_by_claims(claims)\n\n        if len(users) == 1:\n            user = users.get()\n            self.update_user_from_claims(user, claims)\n            return user\n        elif settings.OIDC_CREATE_USER:\n            return self.create_user(claims)\n        else:\n            LOGGER.debug(\n                \"Login failed: No user with username %s found, and \"\n                \"OIDC_CREATE_USER is False\",\n                self.get_username(claims),\n            )\n            return None\n\n    def update_user_from_claims(self, user, claims):\n        user.email = claims.get(settings.OIDC_EMAIL_CLAIM, \"\")\n        user.first_name = claims.get(settings.OIDC_FIRSTNAME_CLAIM, \"\")\n        user.last_name = claims.get(settings.OIDC_LASTNAME_CLAIM, \"\")\n        user.save()\n\n    def filter_users_by_claims(self, claims):\n        username = self.get_username(claims)\n        return self.UserModel.objects.filter(username__iexact=username)\n\n    def cached_request(self, method, token, cache_prefix):\n        token_hash = hashlib.sha256(force_bytes(token)).hexdigest()\n\n        func = functools.partial(method, token, None, None)\n\n        return cache.get_or_set(\n            f\"{cache_prefix}.{token_hash}\",\n            func,\n            timeout=settings.OIDC_BEARER_TOKEN_REVALIDATION_TIME,\n        )\n\n    def create_user(self, claims):\n        \"\"\"Return object for a newly created user account.\"\"\"\n\n        username = self.get_username(claims)\n        email = claims.get(settings.OIDC_EMAIL_CLAIM, \"\")\n        first_name = claims.get(settings.OIDC_FIRSTNAME_CLAIM, \"\")\n        last_name = claims.get(settings.OIDC_LASTNAME_CLAIM, \"\")\n\n        return self.UserModel.objects.create(\n            username=username, email=email, first_name=first_name, last_name=last_name\n        )\n\n    def get_username(self, claims):\n        try:\n            return claims[settings.OIDC_USERNAME_CLAIM]\n        except KeyError:\n            raise SuspiciousOperation(\"Couldn't find username claim\")\n", "path": "timed/authentication.py"}]}