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Fix bug where we did not correctly explode when multiple user_ids were set in macaroon

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This commit is contained in:
Erik Johnston 2016-07-07 16:11:37 +01:00
parent bc72d381b2
commit 067596d341
1 changed files with 10 additions and 5 deletions
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15
synapse/api/auth.py
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@ -637,17 +637,22 @@ class Auth(object):
try:
macaroon = pymacaroons.Macaroon.deserialize(macaroon_str)
self.validate_macaroon(macaroon, rights, self.hs.config.expire_access_token)
user_prefix = "user_id = "
user = None
user_id = None
guest = False
for caveat in macaroon.caveats:
if caveat.caveat_id.startswith(user_prefix):
user = UserID.from_string(caveat.caveat_id[len(user_prefix):])
user_id = caveat.caveat_id[len(user_prefix):]
user = UserID.from_string(user_id)
elif caveat.caveat_id == "guest = true":
guest = True
self.validate_macaroon(
macaroon, rights, self.hs.config.expire_access_token,
user_id=user_id,
)
if user is None:
raise AuthError(
self.TOKEN_NOT_FOUND_HTTP_STATUS, "No user caveat in macaroon",
@ -692,7 +697,7 @@ class Auth(object):
errcode=Codes.UNKNOWN_TOKEN
)
def validate_macaroon(self, macaroon, type_string, verify_expiry):
def validate_macaroon(self, macaroon, type_string, verify_expiry, user_id):
"""
validate that a Macaroon is understood by and was signed by this server.
@ -707,7 +712,7 @@ class Auth(object):
v = pymacaroons.Verifier()
v.satisfy_exact("gen = 1")
v.satisfy_exact("type = " + type_string)
v.satisfy_general(lambda c: c.startswith("user_id = "))
v.satisfy_exact("user_id = %s" % user_id)
v.satisfy_exact("guest = true")
if verify_expiry:
v.satisfy_general(self._verify_expiry)