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Return the proper 403 Forbidden error during errors with JWT logins. (#7844)

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Patrick Cloke 2020-07-15 07:10:21 -04:00 committed by GitHub
parent 1d9dca02f9
commit 111e70d75c
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4 changed files with 27 additions and 30 deletions
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1
changelog.d/7844.bugfix Normal file
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@ -0,0 +1 @@
Errors which occur while using the non-standard JWT login now return the proper error: `403 Forbidden` with an error code of `M_FORBIDDEN`.

5
docs/jwt.md
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@ -31,10 +31,7 @@ The `token` field should include the JSON web token with the following claims:
Providing the audience claim when not configured will cause validation to fail.
In the case that the token is not valid, the homeserver must respond with
`401 Unauthorized` and an error code of `M_UNAUTHORIZED`.
(Note that this differs from the token based logins which return a
`403 Forbidden` and an error code of `M_FORBIDDEN` if an error occurs.)
`403 Forbidden` and an error code of `M_FORBIDDEN`.
As with other login types, there are additional fields (e.g. `device_id` and
`initial_device_display_name`) which can be included in the above request.

8
synapse/rest/client/v1/login.py
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@ -371,7 +371,7 @@ class LoginRestServlet(RestServlet):
token = login_submission.get("token", None)
if token is None:
raise LoginError(
401, "Token field for JWT is missing", errcode=Codes.UNAUTHORIZED
403, "Token field for JWT is missing", errcode=Codes.FORBIDDEN
)
import jwt
@ -387,14 +387,12 @@ class LoginRestServlet(RestServlet):
except jwt.PyJWTError as e:
# A JWT error occurred, return some info back to the client.
raise LoginError(
401,
"JWT validation failed: %s" % (str(e),),
errcode=Codes.UNAUTHORIZED,
403, "JWT validation failed: %s" % (str(e),), errcode=Codes.FORBIDDEN,
)
user = payload.get("sub", None)
if user is None:
raise LoginError(401, "Invalid JWT", errcode=Codes.UNAUTHORIZED)
raise LoginError(403, "Invalid JWT", errcode=Codes.FORBIDDEN)
user_id = UserID(user, self.hs.hostname).to_string()
result = await self._complete_login(

43
tests/rest/client/v1/test_login.py
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@ -547,8 +547,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
def test_login_jwt_invalid_signature(self):
channel = self.jwt_login({"sub": "frog"}, "notsecret")
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"],
"JWT validation failed: Signature verification failed",
@ -556,8 +556,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
def test_login_jwt_expired(self):
channel = self.jwt_login({"sub": "frog", "exp": 864000})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"], "JWT validation failed: Signature has expired"
)
@ -565,8 +565,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
def test_login_jwt_not_before(self):
now = int(time.time())
channel = self.jwt_login({"sub": "frog", "nbf": now + 3600})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"],
"JWT validation failed: The token is not yet valid (nbf)",
@ -574,8 +574,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
def test_login_no_sub(self):
channel = self.jwt_login({"username": "root"})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(channel.json_body["error"], "Invalid JWT")
@override_config(
@ -597,16 +597,16 @@ class JWTTestCase(unittest.HomeserverTestCase):
# An invalid issuer.
channel = self.jwt_login({"sub": "kermit", "iss": "invalid"})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"], "JWT validation failed: Invalid issuer"
)
# Not providing an issuer.
channel = self.jwt_login({"sub": "kermit"})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"],
'JWT validation failed: Token is missing the "iss" claim',
@ -637,16 +637,16 @@ class JWTTestCase(unittest.HomeserverTestCase):
# An invalid audience.
channel = self.jwt_login({"sub": "kermit", "aud": "invalid"})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"], "JWT validation failed: Invalid audience"
)
# Not providing an audience.
channel = self.jwt_login({"sub": "kermit"})
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"],
'JWT validation failed: Token is missing the "aud" claim',
@ -655,7 +655,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
def test_login_aud_no_config(self):
"""Test providing an audience without requiring it in the configuration."""
channel = self.jwt_login({"sub": "kermit", "aud": "invalid"})
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"], "JWT validation failed: Invalid audience"
)
@ -664,8 +665,8 @@ class JWTTestCase(unittest.HomeserverTestCase):
params = json.dumps({"type": "org.matrix.login.jwt"})
request, channel = self.make_request(b"POST", LOGIN_URL, params)
self.render(request)
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(channel.json_body["error"], "Token field for JWT is missing")
@ -747,8 +748,8 @@ class JWTPubKeyTestCase(unittest.HomeserverTestCase):
def test_login_jwt_invalid_signature(self):
channel = self.jwt_login({"sub": "frog"}, self.bad_privatekey)
self.assertEqual(channel.result["code"], b"401", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_UNAUTHORIZED")
self.assertEqual(channel.result["code"], b"403", channel.result)
self.assertEqual(channel.json_body["errcode"], "M_FORBIDDEN")
self.assertEqual(
channel.json_body["error"],
"JWT validation failed: Signature verification failed",