use v2 identity service api endpoints for 3pid invites and lookup

1 files changed, 10 insertions, 175 deletions

diff --git a/synapse/handlers/room_member.py b/synapse/handlers/room_member.py
index fd9f94bbd5..3883bcdc97 100644
--- a/synapse/handlers/room_member.py
+++ b/synapse/handlers/room_member.py
@@ -20,20 +20,14 @@ import logging
 
 from six.moves import http_client
 
-from signedjson.key import decode_verify_key_bytes
-from signedjson.sign import verify_signed_json
-from unpaddedbase64 import decode_base64
-
 from twisted.internet import defer
 
 from synapse import types
 from synapse.api.constants import EventTypes, Membership
 from synapse.api.errors import AuthError, Codes, HttpResponseException, SynapseError
-from synapse.handlers.identity import LookupAlgorithm
 from synapse.types import RoomID, UserID
 from synapse.util.async_helpers import Linearizer
 from synapse.util.distributor import user_joined_room, user_left_room
-from synapse.util.hash import sha256_and_url_safe_base64
 
 from ._base import BaseHandler
 
@@ -65,6 +59,7 @@ class RoomMemberHandler(object):
 
         self.federation_handler = hs.get_handlers().federation_handler
         self.directory_handler = hs.get_handlers().directory_handler
+        self.identity_handler = hs.get_handlers().identity_handler
         self.registration_handler = hs.get_registration_handler()
         self.profile_handler = hs.get_profile_handler()
         self.event_creation_handler = hs.get_event_creation_handler()
@@ -671,184 +666,24 @@ class RoomMemberHandler(object):
                 Codes.FORBIDDEN,
             )
 
-        invitee = yield self._lookup_3pid(id_server, medium, address)
-
-        if invitee:
-            yield self.update_membership(
-                requester, UserID.from_string(invitee), room_id, "invite", txn_id=txn_id
-            )
-        else:
-            yield self._make_and_store_3pid_invite(
-                requester, id_server, medium, address, room_id, inviter, txn_id=txn_id
-            )
-
-    @defer.inlineCallbacks
-    def _lookup_3pid(self, id_server, medium, address):
-        """Looks up a 3pid in the passed identity server.
-
-        Args:
-            id_server (str): The server name (including port, if required)
-                of the identity server to use.
-            medium (str): The type of the third party identifier (e.g. "email").
-            address (str): The third party identifier (e.g. "foo@example.com").
-
-        Returns:
-            str: the matrix ID of the 3pid, or None if it is not recognized.
-        """
         if not self._enable_lookup:
             raise SynapseError(
                 403, "Looking up third-party identifiers is denied from this server"
             )
 
-        # Check what hashing details are supported by this identity server
-        use_v1 = False
-        hash_details = None
-        try:
-            hash_details = yield self.simple_http_client.get_json(
-                "%s%s/_matrix/identity/v2/hash_details" % (id_server_scheme, id_server)
-            )
-        except (HttpResponseException, ValueError) as e:
-            # Catch HttpResponseExcept for a non-200 response code
-            # Catch ValueError for non-JSON response body
-
-            # Check if this identity server does not know about v2 lookups
-            if e.code == 404:
-                # This is an old identity server that does not yet support v2 lookups
-                use_v1 = True
-            else:
-                logger.warn("Error when looking up hashing details: %s" % (e,))
-                return None
-
-        if use_v1:
-            return (yield self._lookup_3pid_v1(id_server, medium, address))
-
-        return (yield self._lookup_3pid_v2(id_server, medium, address, hash_details))
-
-    @defer.inlineCallbacks
-    def _lookup_3pid_v1(self, id_server, medium, address):
-        """Looks up a 3pid in the passed identity server using v1 lookup.
-
-        Args:
-            id_server (str): The server name (including port, if required)
-                of the identity server to use.
-            medium (str): The type of the third party identifier (e.g. "email").
-            address (str): The third party identifier (e.g. "foo@example.com").
+        id_server_url = id_server_scheme + id_server
+        invitee = yield self.identity_handler.lookup_3pid(
+            id_server_url, medium, address
+        )
 
-        Returns:
-            str: the matrix ID of the 3pid, or None if it is not recognized.
-        """
-        try:
-            data = yield self.simple_http_client.get_json(
-                "%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server),
-                {"medium": medium, "address": address},
+        if invitee:
+            yield self.update_membership(
+                requester, UserID.from_string(invitee), room_id, "invite", txn_id=txn_id
             )
-
-            if "mxid" in data:
-                if "signatures" not in data:
-                    raise AuthError(401, "No signatures on 3pid binding")
-                yield self._verify_any_signature(data, id_server)
-                return data["mxid"]
-
-        except IOError as e:
-            logger.warn("Error from identity server lookup: %s" % (e,))
-
-        return None
-
-    @defer.inlineCallbacks
-    def _lookup_3pid_v2(self, id_server, medium, address, hash_details):
-        """Looks up a 3pid in the passed identity server using v2 lookup.
-
-        Args:
-            id_server (str): The server name (including port, if required)
-                of the identity server to use.
-            medium (str): The type of the third party identifier (e.g. "email").
-            address (str): The third party identifier (e.g. "foo@example.com").
-            hash_details (dict[str, str|list]): A dictionary containing hashing information
-                provided by an identity server.
-
-        Returns:
-            Deferred[str|None]: the matrix ID of the 3pid, or None if it is not recognised.
-        """
-        # Extract information from hash_details
-        supported_lookup_algorithms = hash_details["algorithms"]
-        lookup_pepper = hash_details["lookup_pepper"]
-
-        # Check if any of the supported lookup algorithms are present
-        if LookupAlgorithm.SHA256 in supported_lookup_algorithms:
-            # Perform a hashed lookup
-            lookup_algorithm = LookupAlgorithm.SHA256
-
-            # Hash address, medium and the pepper with sha256
-            to_hash = "%s %s %s" % (address, medium, lookup_pepper)
-            lookup_value = sha256_and_url_safe_base64(to_hash)
-
-        elif LookupAlgorithm.NONE in supported_lookup_algorithms:
-            # Perform a non-hashed lookup
-            lookup_algorithm = LookupAlgorithm.NONE
-
-            # Combine together plaintext address and medium
-            lookup_value = "%s %s" % (address, medium)
-
         else:
-            logger.warn(
-                "None of the provided lookup algorithms of %s%s are supported: %s",
-                id_server_scheme,
-                id_server,
-                hash_details["algorithms"],
-            )
-            raise SynapseError(
-                400,
-                "Provided identity server does not support any v2 lookup "
-                "algorithms that this homeserver supports.",
-            )
-
-        try:
-            lookup_results = yield self.simple_http_client.post_json_get_json(
-                "%s%s/_matrix/identity/v2/lookup" % (id_server_scheme, id_server),
-                {
-                    "addresses": [lookup_value],
-                    "algorithm": lookup_algorithm,
-                    "pepper": lookup_pepper,
-                },
-            )
-        except (HttpResponseException, ValueError) as e:
-            # Catch HttpResponseExcept for a non-200 response code
-            # Catch ValueError for non-JSON response body
-            logger.warn("Error when performing a 3pid lookup: %s" % (e,))
-            return None
-
-        # Check for a mapping from what we looked up to an MXID
-        if "mappings" not in lookup_results or not isinstance(
-            lookup_results["mappings"], dict
-        ):
-            logger.debug("No results from 3pid lookup")
-            return None
-
-        # Return the MXID if it's available, or None otherwise
-        mxid = lookup_results["mappings"].get(lookup_value)
-        return mxid
-
-    @defer.inlineCallbacks
-    def _verify_any_signature(self, data, server_hostname):
-        if server_hostname not in data["signatures"]:
-            raise AuthError(401, "No signature from server %s" % (server_hostname,))
-        for key_name, signature in data["signatures"][server_hostname].items():
-            key_data = yield self.simple_http_client.get_json(
-                "%s%s/_matrix/identity/api/v1/pubkey/%s"
-                % (id_server_scheme, 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"])
-                ),
+            yield self._make_and_store_3pid_invite(
+                requester, id_server, medium, address, room_id, inviter, txn_id=txn_id
             )
-            return
 
     @defer.inlineCallbacks
     def _make_and_store_3pid_invite(