mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-10-01 11:49:51 -04:00
Merge pull request #302 from matrix-org/daniel/3pidinvites
Implement third party identifier invites
This commit is contained in:
commit
e5acc8a47b
@ -14,15 +14,19 @@
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# limitations under the License.
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"""This module contains classes for authenticating the user."""
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from nacl.exceptions import BadSignatureError
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from twisted.internet import defer
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from synapse.api.constants import EventTypes, Membership, JoinRules
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from synapse.api.errors import AuthError, Codes, SynapseError
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from synapse.util.logutils import log_function
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from synapse.types import RoomID, UserID, EventID
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from synapse.util.logutils import log_function
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from synapse.util import third_party_invites
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from unpaddedbase64 import decode_base64
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import logging
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import nacl.signing
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import pymacaroons
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logger = logging.getLogger(__name__)
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@ -31,6 +35,7 @@ logger = logging.getLogger(__name__)
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AuthEventTypes = (
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EventTypes.Create, EventTypes.Member, EventTypes.PowerLevels,
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EventTypes.JoinRules, EventTypes.RoomHistoryVisibility,
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EventTypes.ThirdPartyInvite,
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)
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@ -341,7 +346,8 @@ class Auth(object):
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pass
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elif join_rule == JoinRules.INVITE:
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if not caller_in_room and not caller_invited:
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raise AuthError(403, "You are not invited to this room.")
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if not self._verify_third_party_invite(event, auth_events):
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raise AuthError(403, "You are not invited to this room.")
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else:
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# TODO (erikj): may_join list
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# TODO (erikj): private rooms
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@ -367,6 +373,61 @@ class Auth(object):
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return True
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def _verify_third_party_invite(self, event, auth_events):
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"""
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Validates that the join event is authorized by a previous third-party invite.
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Checks that the public key, and keyserver, match those in the invite,
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and that the join event has a signature issued using that public key.
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Args:
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event: The m.room.member join event being validated.
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auth_events: All relevant previous context events which may be used
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for authorization decisions.
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Return:
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True if the event fulfills the expectations of a previous third party
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invite event.
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"""
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if not third_party_invites.join_has_third_party_invite(event.content):
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return False
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join_third_party_invite = event.content["third_party_invite"]
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token = join_third_party_invite["token"]
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invite_event = auth_events.get(
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(EventTypes.ThirdPartyInvite, token,)
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)
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if not invite_event:
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logger.info("Failing 3pid invite because no invite found for token %s", token)
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return False
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try:
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public_key = join_third_party_invite["public_key"]
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key_validity_url = join_third_party_invite["key_validity_url"]
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if invite_event.content["public_key"] != public_key:
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logger.info(
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"Failing 3pid invite because public key invite: %s != join: %s",
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invite_event.content["public_key"],
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public_key
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)
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return False
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if invite_event.content["key_validity_url"] != key_validity_url:
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logger.info(
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"Failing 3pid invite because key_validity_url invite: %s != join: %s",
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invite_event.content["key_validity_url"],
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key_validity_url
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)
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return False
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for _, signature_block in join_third_party_invite["signatures"].items():
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for key_name, encoded_signature in signature_block.items():
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if not key_name.startswith("ed25519:"):
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return False
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verify_key = nacl.signing.VerifyKey(decode_base64(public_key))
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signature = decode_base64(encoded_signature)
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verify_key.verify(token, signature)
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return True
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return False
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except (KeyError, BadSignatureError,):
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return False
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def _get_power_level_event(self, auth_events):
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key = (EventTypes.PowerLevels, "", )
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return auth_events.get(key)
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@ -646,6 +707,14 @@ class Auth(object):
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if e_type == Membership.JOIN:
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if member_event and not is_public:
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auth_ids.append(member_event.event_id)
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if third_party_invites.join_has_third_party_invite(event.content):
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key = (
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EventTypes.ThirdPartyInvite,
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event.content["third_party_invite"]["token"]
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)
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invite = current_state.get(key)
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if invite:
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auth_ids.append(invite.event_id)
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else:
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if member_event:
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auth_ids.append(member_event.event_id)
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@ -63,6 +63,7 @@ class EventTypes(object):
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PowerLevels = "m.room.power_levels"
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Aliases = "m.room.aliases"
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Redaction = "m.room.redaction"
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ThirdPartyInvite = "m.room.third_party_invite"
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RoomHistoryVisibility = "m.room.history_visibility"
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CanonicalAlias = "m.room.canonical_alias"
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@ -25,6 +25,7 @@ from synapse.api.errors import (
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from synapse.util import unwrapFirstError
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from synapse.util.caches.expiringcache import ExpiringCache
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from synapse.util.logutils import log_function
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from synapse.util import third_party_invites
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from synapse.events import FrozenEvent
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import synapse.metrics
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@ -356,14 +357,19 @@ class FederationClient(FederationBase):
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defer.returnValue(signed_auth)
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@defer.inlineCallbacks
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def make_join(self, destinations, room_id, user_id):
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def make_join(self, destinations, room_id, user_id, content):
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for destination in destinations:
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if destination == self.server_name:
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continue
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args = {}
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if third_party_invites.join_has_third_party_invite(content):
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args = third_party_invites.extract_join_keys(
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content["third_party_invite"]
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)
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try:
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ret = yield self.transport_layer.make_join(
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destination, room_id, user_id
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destination, room_id, user_id, args
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)
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pdu_dict = ret["event"]
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@ -23,10 +23,12 @@ from synapse.util.logutils import log_function
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from synapse.events import FrozenEvent
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import synapse.metrics
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from synapse.api.errors import FederationError, SynapseError
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from synapse.api.errors import FederationError, SynapseError, Codes
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from synapse.crypto.event_signing import compute_event_signature
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from synapse.util import third_party_invites
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import simplejson as json
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import logging
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@ -228,8 +230,19 @@ class FederationServer(FederationBase):
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)
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@defer.inlineCallbacks
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def on_make_join_request(self, room_id, user_id):
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pdu = yield self.handler.on_make_join_request(room_id, user_id)
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def on_make_join_request(self, room_id, user_id, query):
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threepid_details = {}
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if third_party_invites.has_join_keys(query):
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for k in third_party_invites.JOIN_KEYS:
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if not isinstance(query[k], list) or len(query[k]) != 1:
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raise FederationError(
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"FATAL",
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Codes.MISSING_PARAM,
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"key %s value %s" % (k, query[k],),
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None
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)
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threepid_details[k] = query[k][0]
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pdu = yield self.handler.on_make_join_request(room_id, user_id, threepid_details)
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time_now = self._clock.time_msec()
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defer.returnValue({"event": pdu.get_pdu_json(time_now)})
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@ -160,13 +160,14 @@ class TransportLayerClient(object):
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@defer.inlineCallbacks
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@log_function
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def make_join(self, destination, room_id, user_id, retry_on_dns_fail=True):
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def make_join(self, destination, room_id, user_id, args={}):
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path = PREFIX + "/make_join/%s/%s" % (room_id, user_id)
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content = yield self.client.get_json(
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destination=destination,
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path=path,
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retry_on_dns_fail=retry_on_dns_fail,
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args=args,
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retry_on_dns_fail=True,
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)
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defer.returnValue(content)
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@ -292,7 +292,7 @@ class FederationMakeJoinServlet(BaseFederationServlet):
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@defer.inlineCallbacks
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def on_GET(self, origin, content, query, context, user_id):
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content = yield self.handler.on_make_join_request(context, user_id)
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content = yield self.handler.on_make_join_request(context, user_id, query)
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defer.returnValue((200, content))
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@ -21,6 +21,7 @@ from synapse.api.constants import Membership, EventTypes
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from synapse.types import UserID, RoomAlias
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from synapse.util.logcontext import PreserveLoggingContext
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from synapse.util import third_party_invites
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import logging
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@ -169,6 +170,16 @@ class BaseHandler(object):
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)
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)
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if (
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event.type == EventTypes.Member and
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event.content["membership"] == Membership.JOIN and
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third_party_invites.join_has_third_party_invite(event.content)
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):
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yield third_party_invites.check_key_valid(
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self.hs.get_simple_http_client(),
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event
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)
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federation_handler = self.hs.get_handlers().federation_handler
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if event.type == EventTypes.Member:
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@ -39,7 +39,7 @@ from twisted.internet import defer
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import itertools
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import logging
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from synapse.util import third_party_invites
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logger = logging.getLogger(__name__)
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@ -584,7 +584,8 @@ class FederationHandler(BaseHandler):
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origin, pdu = yield self.replication_layer.make_join(
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target_hosts,
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room_id,
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joinee
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joinee,
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content
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)
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logger.debug("Got response to make_join: %s", pdu)
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@ -697,14 +698,20 @@ class FederationHandler(BaseHandler):
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@defer.inlineCallbacks
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@log_function
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def on_make_join_request(self, room_id, user_id):
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def on_make_join_request(self, room_id, user_id, query):
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""" We've received a /make_join/ request, so we create a partial
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join event for the room and return that. We don *not* persist or
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process it until the other server has signed it and sent it back.
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"""
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event_content = {"membership": Membership.JOIN}
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if third_party_invites.has_join_keys(query):
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event_content["third_party_invite"] = (
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third_party_invites.extract_join_keys(query)
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)
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builder = self.event_builder_factory.new({
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"type": EventTypes.Member,
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"content": {"membership": Membership.JOIN},
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"content": event_content,
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"room_id": room_id,
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"sender": user_id,
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"state_key": user_id,
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@ -716,6 +723,9 @@ class FederationHandler(BaseHandler):
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self.auth.check(event, auth_events=context.current_state)
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if third_party_invites.join_has_third_party_invite(event.content):
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third_party_invites.check_key_valid(self.hs.get_simple_http_client(), event)
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defer.returnValue(event)
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@defer.inlineCallbacks
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|
@ -22,11 +22,16 @@ from synapse.types import UserID, RoomAlias, RoomID
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from synapse.api.constants import (
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EventTypes, Membership, JoinRules, RoomCreationPreset,
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)
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from synapse.api.errors import StoreError, SynapseError
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from synapse.api.errors import AuthError, StoreError, SynapseError
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from synapse.util import stringutils, unwrapFirstError
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from synapse.util.async import run_on_reactor
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from signedjson.sign import verify_signed_json
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from signedjson.key import decode_verify_key_bytes
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from collections import OrderedDict
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from unpaddedbase64 import decode_base64
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import logging
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import string
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@ -483,6 +488,13 @@ class RoomMemberHandler(BaseHandler):
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should_do_dance = not self.hs.is_mine(inviter)
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room_hosts = [inviter.domain]
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elif "third_party_invite" in event.content:
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if "sender" in event.content["third_party_invite"]:
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inviter = UserID.from_string(
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event.content["third_party_invite"]["sender"]
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)
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should_do_dance = not self.hs.is_mine(inviter)
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room_hosts = [inviter.domain]
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else:
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# return the same error as join_room_alias does
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raise SynapseError(404, "No known servers")
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@ -540,6 +552,160 @@ class RoomMemberHandler(BaseHandler):
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suppress_auth=(not do_auth),
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)
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@defer.inlineCallbacks
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def do_3pid_invite(
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self,
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room_id,
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inviter,
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medium,
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address,
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id_server,
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display_name,
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token_id,
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txn_id
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):
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invitee = yield self._lookup_3pid(
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id_server, medium, address
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)
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if invitee:
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# make sure it looks like a user ID; it'll throw if it's invalid.
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UserID.from_string(invitee)
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yield self.hs.get_handlers().message_handler.create_and_send_event(
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{
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"type": EventTypes.Member,
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"content": {
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"membership": unicode("invite")
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},
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"room_id": room_id,
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"sender": inviter.to_string(),
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"state_key": invitee,
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},
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token_id=token_id,
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txn_id=txn_id,
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)
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else:
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yield self._make_and_store_3pid_invite(
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id_server,
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display_name,
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medium,
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address,
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room_id,
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inviter,
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token_id,
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txn_id=txn_id
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)
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@defer.inlineCallbacks
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def _lookup_3pid(self, id_server, medium, address):
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"""Looks up a 3pid in the passed identity server.
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Args:
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id_server (str): The server name (including port, if required)
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of the identity server to use.
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medium (str): The type of the third party identifier (e.g. "email").
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address (str): The third party identifier (e.g. "foo@example.com").
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Returns:
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(str) the matrix ID of the 3pid, or None if it is not recognized.
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"""
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||||
try:
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data = yield self.hs.get_simple_http_client().get_json(
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||||
"https://%s/_matrix/identity/api/v1/lookup" % (id_server,),
|
||||
{
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||||
"medium": medium,
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||||
"address": address,
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||||
}
|
||||
)
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||||
|
||||
if "mxid" in data:
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||||
if "signatures" not in data:
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||||
raise AuthError(401, "No signatures on 3pid binding")
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||||
self.verify_any_signature(data, id_server)
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||||
defer.returnValue(data["mxid"])
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||||
|
||||
except IOError as e:
|
||||
logger.warn("Error from identity server lookup: %s" % (e,))
|
||||
defer.returnValue(None)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def verify_any_signature(self, data, server_hostname):
|
||||
if server_hostname not in data["signatures"]:
|
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raise AuthError(401, "No signature from server %s" % (server_hostname,))
|
||||
for key_name, signature in data["signatures"][server_hostname].items():
|
||||
key_data = yield self.hs.get_simple_http_client().get_json(
|
||||
"https://%s/_matrix/identity/api/v1/pubkey/%s" %
|
||||
(server_hostname, key_name,),
|
||||
)
|
||||
if "public_key" not in key_data:
|
||||
raise AuthError(401, "No public key named %s from %s" %
|
||||
(key_name, server_hostname,))
|
||||
verify_signed_json(
|
||||
data,
|
||||
server_hostname,
|
||||
decode_verify_key_bytes(key_name, decode_base64(key_data["public_key"]))
|
||||
)
|
||||
return
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _make_and_store_3pid_invite(
|
||||
self,
|
||||
id_server,
|
||||
display_name,
|
||||
medium,
|
||||
address,
|
||||
room_id,
|
||||
user,
|
||||
token_id,
|
||||
txn_id
|
||||
):
|
||||
token, public_key, key_validity_url = (
|
||||
yield self._ask_id_server_for_third_party_invite(
|
||||
id_server,
|
||||
medium,
|
||||
address,
|
||||
room_id,
|
||||
user.to_string()
|
||||
)
|
||||
)
|
||||
msg_handler = self.hs.get_handlers().message_handler
|
||||
yield msg_handler.create_and_send_event(
|
||||
{
|
||||
"type": EventTypes.ThirdPartyInvite,
|
||||
"content": {
|
||||
"display_name": display_name,
|
||||
"key_validity_url": key_validity_url,
|
||||
"public_key": public_key,
|
||||
},
|
||||
"room_id": room_id,
|
||||
"sender": user.to_string(),
|
||||
"state_key": token,
|
||||
},
|
||||
token_id=token_id,
|
||||
txn_id=txn_id,
|
||||
)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _ask_id_server_for_third_party_invite(
|
||||
self, id_server, medium, address, room_id, sender):
|
||||
is_url = "https://%s/_matrix/identity/api/v1/store-invite" % (id_server,)
|
||||
data = yield self.hs.get_simple_http_client().post_urlencoded_get_json(
|
||||
is_url,
|
||||
{
|
||||
"medium": medium,
|
||||
"address": address,
|
||||
"room_id": room_id,
|
||||
"sender": sender,
|
||||
}
|
||||
)
|
||||
# TODO: Check for success
|
||||
token = data["token"]
|
||||
public_key = data["public_key"]
|
||||
key_validity_url = "https://%s/_matrix/identity/api/v1/pubkey/isvalid" % (
|
||||
id_server,
|
||||
)
|
||||
defer.returnValue((token, public_key, key_validity_url))
|
||||
|
||||
|
||||
class RoomListHandler(BaseHandler):
|
||||
|
||||
|
@ -24,7 +24,6 @@ from canonicaljson import encode_canonical_json
|
||||
from twisted.internet import defer, reactor, ssl
|
||||
from twisted.web.client import (
|
||||
Agent, readBody, FileBodyProducer, PartialDownloadError,
|
||||
HTTPConnectionPool,
|
||||
)
|
||||
from twisted.web.http_headers import Headers
|
||||
|
||||
@ -59,11 +58,8 @@ class SimpleHttpClient(object):
|
||||
# The default context factory in Twisted 14.0.0 (which we require) is
|
||||
# BrowserLikePolicyForHTTPS which will do regular cert validation
|
||||
# 'like a browser'
|
||||
pool = HTTPConnectionPool(reactor)
|
||||
pool.maxPersistentPerHost = 10
|
||||
self.agent = Agent(
|
||||
reactor,
|
||||
pool=pool,
|
||||
connectTimeout=15,
|
||||
contextFactory=hs.get_http_client_context_factory()
|
||||
)
|
||||
|
@ -26,7 +26,7 @@ from synapse.events.utils import serialize_event
|
||||
import simplejson as json
|
||||
import logging
|
||||
import urllib
|
||||
|
||||
from synapse.util import third_party_invites
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
@ -414,10 +414,26 @@ class RoomMembershipRestServlet(ClientV1RestServlet):
|
||||
|
||||
# target user is you unless it is an invite
|
||||
state_key = user.to_string()
|
||||
if membership_action in ["invite", "ban", "kick"]:
|
||||
if "user_id" not in content:
|
||||
|
||||
if membership_action == "invite" and third_party_invites.has_invite_keys(content):
|
||||
yield self.handlers.room_member_handler.do_3pid_invite(
|
||||
room_id,
|
||||
user,
|
||||
content["medium"],
|
||||
content["address"],
|
||||
content["id_server"],
|
||||
content["display_name"],
|
||||
token_id,
|
||||
txn_id
|
||||
)
|
||||
defer.returnValue((200, {}))
|
||||
return
|
||||
elif membership_action in ["invite", "ban", "kick"]:
|
||||
if "user_id" in content:
|
||||
state_key = content["user_id"]
|
||||
else:
|
||||
raise SynapseError(400, "Missing user_id key.")
|
||||
state_key = content["user_id"]
|
||||
|
||||
# make sure it looks like a user ID; it'll throw if it's invalid.
|
||||
UserID.from_string(state_key)
|
||||
|
||||
@ -425,10 +441,20 @@ class RoomMembershipRestServlet(ClientV1RestServlet):
|
||||
membership_action = "leave"
|
||||
|
||||
msg_handler = self.handlers.message_handler
|
||||
|
||||
event_content = {
|
||||
"membership": unicode(membership_action),
|
||||
}
|
||||
|
||||
if membership_action == "join" and third_party_invites.has_join_keys(content):
|
||||
event_content["third_party_invite"] = (
|
||||
third_party_invites.extract_join_keys(content)
|
||||
)
|
||||
|
||||
yield msg_handler.create_and_send_event(
|
||||
{
|
||||
"type": EventTypes.Member,
|
||||
"content": {"membership": unicode(membership_action)},
|
||||
"content": event_content,
|
||||
"room_id": room_id,
|
||||
"sender": user.to_string(),
|
||||
"state_key": state_key,
|
||||
|
69
synapse/util/third_party_invites.py
Normal file
69
synapse/util/third_party_invites.py
Normal file
@ -0,0 +1,69 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
# Copyright 2015 OpenMarket Ltd
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
#
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
#
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
|
||||
from twisted.internet import defer
|
||||
from synapse.api.errors import AuthError
|
||||
|
||||
|
||||
INVITE_KEYS = {"id_server", "medium", "address", "display_name"}
|
||||
|
||||
JOIN_KEYS = {
|
||||
"token",
|
||||
"public_key",
|
||||
"key_validity_url",
|
||||
"signatures",
|
||||
"sender",
|
||||
}
|
||||
|
||||
|
||||
def has_invite_keys(content):
|
||||
for key in INVITE_KEYS:
|
||||
if key not in content:
|
||||
return False
|
||||
return True
|
||||
|
||||
|
||||
def has_join_keys(content):
|
||||
for key in JOIN_KEYS:
|
||||
if key not in content:
|
||||
return False
|
||||
return True
|
||||
|
||||
|
||||
def join_has_third_party_invite(content):
|
||||
if "third_party_invite" not in content:
|
||||
return False
|
||||
return has_join_keys(content["third_party_invite"])
|
||||
|
||||
|
||||
def extract_join_keys(src):
|
||||
return {
|
||||
key: value
|
||||
for key, value in src.items()
|
||||
if key in JOIN_KEYS
|
||||
}
|
||||
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def check_key_valid(http_client, event):
|
||||
try:
|
||||
response = yield http_client.get_json(
|
||||
event.content["third_party_invite"]["key_validity_url"],
|
||||
{"public_key": event.content["third_party_invite"]["public_key"]}
|
||||
)
|
||||
except Exception:
|
||||
raise AuthError(502, "Third party certificate could not be checked")
|
||||
if "valid" not in response or not response["valid"]:
|
||||
raise AuthError(403, "Third party certificate was invalid")
|
Loading…
Reference in New Issue
Block a user