diff options
Diffstat (limited to 'synapse/api/auth.py')
| -rw-r--r-- | synapse/api/auth.py | 73 |
1 files changed, 38 insertions, 35 deletions
diff --git a/synapse/api/auth.py b/synapse/api/auth.py index dfbbc5a1cd..3e891a6193 100644 --- a/synapse/api/auth.py +++ b/synapse/api/auth.py @@ -24,7 +24,6 @@ from synapse.api.constants import EventTypes, Membership, JoinRules from synapse.api.errors import AuthError, Codes, SynapseError, EventSizeError from synapse.types import RoomID, UserID, EventID from synapse.util.logutils import log_function -from synapse.util import third_party_invites from unpaddedbase64 import decode_base64 import logging @@ -318,6 +317,11 @@ class Auth(object): } ) + if Membership.INVITE == membership and "third_party_invite" in event.content: + if not self._verify_third_party_invite(event, auth_events): + raise AuthError(403, "You are not invited to this room.") + return True + if Membership.JOIN != membership: if (caller_invited and Membership.LEAVE == membership @@ -361,8 +365,7 @@ class Auth(object): pass elif join_rule == JoinRules.INVITE: if not caller_in_room and not caller_invited: - if not self._verify_third_party_invite(event, auth_events): - raise AuthError(403, "You are not invited to this room.") + raise AuthError(403, "You are not invited to this room.") else: # TODO (erikj): may_join list # TODO (erikj): private rooms @@ -390,10 +393,10 @@ class Auth(object): def _verify_third_party_invite(self, event, auth_events): """ - Validates that the join event is authorized by a previous third-party invite. + Validates that the invite event is authorized by a previous third-party invite. - Checks that the public key, and keyserver, match those in the invite, - and that the join event has a signature issued using that public key. + Checks that the public key, and keyserver, match those in the third party invite, + and that the invite event has a signature issued using that public key. Args: event: The m.room.member join event being validated. @@ -404,35 +407,28 @@ class Auth(object): True if the event fulfills the expectations of a previous third party invite event. """ - if not third_party_invites.join_has_third_party_invite(event.content): + if "third_party_invite" not in event.content: + return False + if "signed" not in event.content["third_party_invite"]: return False - join_third_party_invite = event.content["third_party_invite"] - token = join_third_party_invite["token"] + signed = event.content["third_party_invite"]["signed"] + for key in {"mxid", "token"}: + if key not in signed: + return False + + token = signed["token"] + invite_event = auth_events.get( (EventTypes.ThirdPartyInvite, token,) ) if not invite_event: - logger.info("Failing 3pid invite because no invite found for token %s", token) + return False + + if event.user_id != invite_event.user_id: return False try: - public_key = join_third_party_invite["public_key"] - key_validity_url = join_third_party_invite["key_validity_url"] - if invite_event.content["public_key"] != public_key: - logger.info( - "Failing 3pid invite because public key invite: %s != join: %s", - invite_event.content["public_key"], - public_key - ) - return False - if invite_event.content["key_validity_url"] != key_validity_url: - logger.info( - "Failing 3pid invite because key_validity_url invite: %s != join: %s", - invite_event.content["key_validity_url"], - key_validity_url - ) - return False - signed = join_third_party_invite["signed"] - if signed["mxid"] != event.user_id: + public_key = invite_event.content["public_key"] + if signed["mxid"] != event.state_key: return False if signed["token"] != token: return False @@ -445,6 +441,11 @@ class Auth(object): decode_base64(public_key) ) verify_signed_json(signed, server, verify_key) + + # We got the public key from the invite, so we know that the + # correct server signed the signed bundle. + # The caller is responsible for checking that the signing + # server has not revoked that public key. return True return False except (KeyError, SignatureVerifyException,): @@ -751,17 +752,19 @@ class Auth(object): if e_type == Membership.JOIN: if member_event and not is_public: auth_ids.append(member_event.event_id) - if third_party_invites.join_has_third_party_invite(event.content): + else: + if member_event: + auth_ids.append(member_event.event_id) + + if e_type == Membership.INVITE: + if "third_party_invite" in event.content: key = ( EventTypes.ThirdPartyInvite, event.content["third_party_invite"]["token"] ) - invite = current_state.get(key) - if invite: - auth_ids.append(invite.event_id) - else: - if member_event: - auth_ids.append(member_event.event_id) + third_party_invite = current_state.get(key) + if third_party_invite: + auth_ids.append(third_party_invite.event_id) elif member_event: if member_event.content["membership"] == Membership.JOIN: auth_ids.append(member_event.event_id) |