diff --git a/synapse/api/errors.py b/synapse/api/errors.py
index 2e7f98404d..48b903374d 100644
--- a/synapse/api/errors.py
+++ b/synapse/api/errors.py
@@ -59,6 +59,7 @@ class Codes(object):
RESOURCE_LIMIT_EXCEEDED = "M_RESOURCE_LIMIT_EXCEEDED"
UNSUPPORTED_ROOM_VERSION = "M_UNSUPPORTED_ROOM_VERSION"
INCOMPATIBLE_ROOM_VERSION = "M_INCOMPATIBLE_ROOM_VERSION"
+ WRONG_ROOM_KEYS_VERSION = "M_WRONG_ROOM_KEYS_VERSION"
class CodeMessageException(RuntimeError):
@@ -312,6 +313,20 @@ class LimitExceededError(SynapseError):
)
+class RoomKeysVersionError(SynapseError):
+ """A client has tried to upload to a non-current version of the room_keys store
+ """
+ def __init__(self, current_version):
+ """
+ Args:
+ current_version (str): the current version of the store they should have used
+ """
+ super(RoomKeysVersionError, self).__init__(
+ 403, "Wrong room_keys version", Codes.WRONG_ROOM_KEYS_VERSION
+ )
+ self.current_version = current_version
+
+
class IncompatibleRoomVersionError(SynapseError):
"""A server is trying to join a room whose version it does not support."""
diff --git a/synapse/handlers/e2e_room_keys.py b/synapse/handlers/e2e_room_keys.py
new file mode 100644
index 0000000000..5edb3cfe04
--- /dev/null
+++ b/synapse/handlers/e2e_room_keys.py
@@ -0,0 +1,289 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017, 2018 New Vector 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.
+
+import logging
+
+from six import iteritems
+
+from twisted.internet import defer
+
+from synapse.api.errors import RoomKeysVersionError, StoreError, SynapseError
+from synapse.util.async_helpers import Linearizer
+
+logger = logging.getLogger(__name__)
+
+
+class E2eRoomKeysHandler(object):
+ """
+ Implements an optional realtime backup mechanism for encrypted E2E megolm room keys.
+ This gives a way for users to store and recover their megolm keys if they lose all
+ their clients. It should also extend easily to future room key mechanisms.
+ The actual payload of the encrypted keys is completely opaque to the handler.
+ """
+
+ def __init__(self, hs):
+ self.store = hs.get_datastore()
+
+ # Used to lock whenever a client is uploading key data. This prevents collisions
+ # between clients trying to upload the details of a new session, given all
+ # clients belonging to a user will receive and try to upload a new session at
+ # roughly the same time. Also used to lock out uploads when the key is being
+ # changed.
+ self._upload_linearizer = Linearizer("upload_room_keys_lock")
+
+ @defer.inlineCallbacks
+ def get_room_keys(self, user_id, version, room_id=None, session_id=None):
+ """Bulk get the E2E room keys for a given backup, optionally filtered to a given
+ room, or a given session.
+ See EndToEndRoomKeyStore.get_e2e_room_keys for full details.
+
+ Args:
+ user_id(str): the user whose keys we're getting
+ version(str): the version ID of the backup we're getting keys from
+ room_id(string): room ID to get keys for, for None to get keys for all rooms
+ session_id(string): session ID to get keys for, for None to get keys for all
+ sessions
+ Returns:
+ A deferred list of dicts giving the session_data and message metadata for
+ these room keys.
+ """
+
+ # we deliberately take the lock to get keys so that changing the version
+ # works atomically
+ with (yield self._upload_linearizer.queue(user_id)):
+ results = yield self.store.get_e2e_room_keys(
+ user_id, version, room_id, session_id
+ )
+
+ if results['rooms'] == {}:
+ raise SynapseError(404, "No room_keys found")
+
+ defer.returnValue(results)
+
+ @defer.inlineCallbacks
+ def delete_room_keys(self, user_id, version, room_id=None, session_id=None):
+ """Bulk delete the E2E room keys for a given backup, optionally filtered to a given
+ room or a given session.
+ See EndToEndRoomKeyStore.delete_e2e_room_keys for full details.
+
+ Args:
+ user_id(str): the user whose backup we're deleting
+ version(str): the version ID of the backup we're deleting
+ room_id(string): room ID to delete keys for, for None to delete keys for all
+ rooms
+ session_id(string): session ID to delete keys for, for None to delete keys
+ for all sessions
+ Returns:
+ A deferred of the deletion transaction
+ """
+
+ # lock for consistency with uploading
+ with (yield self._upload_linearizer.queue(user_id)):
+ yield self.store.delete_e2e_room_keys(user_id, version, room_id, session_id)
+
+ @defer.inlineCallbacks
+ def upload_room_keys(self, user_id, version, room_keys):
+ """Bulk upload a list of room keys into a given backup version, asserting
+ that the given version is the current backup version. room_keys are merged
+ into the current backup as described in RoomKeysServlet.on_PUT().
+
+ Args:
+ user_id(str): the user whose backup we're setting
+ version(str): the version ID of the backup we're updating
+ room_keys(dict): a nested dict describing the room_keys we're setting:
+
+ {
+ "rooms": {
+ "!abc:matrix.org": {
+ "sessions": {
+ "c0ff33": {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+ }
+ }
+ }
+ }
+
+ Raises:
+ SynapseError: with code 404 if there are no versions defined
+ RoomKeysVersionError: if the uploaded version is not the current version
+ """
+
+ # TODO: Validate the JSON to make sure it has the right keys.
+
+ # XXX: perhaps we should use a finer grained lock here?
+ with (yield self._upload_linearizer.queue(user_id)):
+
+ # Check that the version we're trying to upload is the current version
+ try:
+ version_info = yield self.store.get_e2e_room_keys_version_info(user_id)
+ except StoreError as e:
+ if e.code == 404:
+ raise SynapseError(404, "Version '%s' not found" % (version,))
+ else:
+ raise
+
+ if version_info['version'] != version:
+ # Check that the version we're trying to upload actually exists
+ try:
+ version_info = yield self.store.get_e2e_room_keys_version_info(
+ user_id, version,
+ )
+ # if we get this far, the version must exist
+ raise RoomKeysVersionError(current_version=version_info['version'])
+ except StoreError as e:
+ if e.code == 404:
+ raise SynapseError(404, "Version '%s' not found" % (version,))
+ else:
+ raise
+
+ # go through the room_keys.
+ # XXX: this should/could be done concurrently, given we're in a lock.
+ for room_id, room in iteritems(room_keys['rooms']):
+ for session_id, session in iteritems(room['sessions']):
+ yield self._upload_room_key(
+ user_id, version, room_id, session_id, session
+ )
+
+ @defer.inlineCallbacks
+ def _upload_room_key(self, user_id, version, room_id, session_id, room_key):
+ """Upload a given room_key for a given room and session into a given
+ version of the backup. Merges the key with any which might already exist.
+
+ Args:
+ user_id(str): the user whose backup we're setting
+ version(str): the version ID of the backup we're updating
+ room_id(str): the ID of the room whose keys we're setting
+ session_id(str): the session whose room_key we're setting
+ room_key(dict): the room_key being set
+ """
+
+ # get the room_key for this particular row
+ current_room_key = None
+ try:
+ current_room_key = yield self.store.get_e2e_room_key(
+ user_id, version, room_id, session_id
+ )
+ except StoreError as e:
+ if e.code == 404:
+ pass
+ else:
+ raise
+
+ if self._should_replace_room_key(current_room_key, room_key):
+ yield self.store.set_e2e_room_key(
+ user_id, version, room_id, session_id, room_key
+ )
+
+ @staticmethod
+ def _should_replace_room_key(current_room_key, room_key):
+ """
+ Determine whether to replace a given current_room_key (if any)
+ with a newly uploaded room_key backup
+
+ Args:
+ current_room_key (dict): Optional, the current room_key dict if any
+ room_key (dict): The new room_key dict which may or may not be fit to
+ replace the current_room_key
+
+ Returns:
+ True if current_room_key should be replaced by room_key in the backup
+ """
+
+ if current_room_key:
+ # spelt out with if/elifs rather than nested boolean expressions
+ # purely for legibility.
+
+ if room_key['is_verified'] and not current_room_key['is_verified']:
+ return True
+ elif (
+ room_key['first_message_index'] <
+ current_room_key['first_message_index']
+ ):
+ return True
+ elif room_key['forwarded_count'] < current_room_key['forwarded_count']:
+ return True
+ else:
+ return False
+ return True
+
+ @defer.inlineCallbacks
+ def create_version(self, user_id, version_info):
+ """Create a new backup version. This automatically becomes the new
+ backup version for the user's keys; previous backups will no longer be
+ writeable to.
+
+ Args:
+ user_id(str): the user whose backup version we're creating
+ version_info(dict): metadata about the new version being created
+
+ {
+ "algorithm": "m.megolm_backup.v1",
+ "auth_data": "dGhpcyBzaG91bGQgYWN0dWFsbHkgYmUgZW5jcnlwdGVkIGpzb24K"
+ }
+
+ Returns:
+ A deferred of a string that gives the new version number.
+ """
+
+ # TODO: Validate the JSON to make sure it has the right keys.
+
+ # lock everyone out until we've switched version
+ with (yield self._upload_linearizer.queue(user_id)):
+ new_version = yield self.store.create_e2e_room_keys_version(
+ user_id, version_info
+ )
+ defer.returnValue(new_version)
+
+ @defer.inlineCallbacks
+ def get_version_info(self, user_id, version=None):
+ """Get the info about a given version of the user's backup
+
+ Args:
+ user_id(str): the user whose current backup version we're querying
+ version(str): Optional; if None gives the most recent version
+ otherwise a historical one.
+ Raises:
+ StoreError: code 404 if the requested backup version doesn't exist
+ Returns:
+ A deferred of a info dict that gives the info about the new version.
+
+ {
+ "version": "1234",
+ "algorithm": "m.megolm_backup.v1",
+ "auth_data": "dGhpcyBzaG91bGQgYWN0dWFsbHkgYmUgZW5jcnlwdGVkIGpzb24K"
+ }
+ """
+
+ with (yield self._upload_linearizer.queue(user_id)):
+ res = yield self.store.get_e2e_room_keys_version_info(user_id, version)
+ defer.returnValue(res)
+
+ @defer.inlineCallbacks
+ def delete_version(self, user_id, version=None):
+ """Deletes a given version of the user's e2e_room_keys backup
+
+ Args:
+ user_id(str): the user whose current backup version we're deleting
+ version(str): the version id of the backup being deleted
+ Raises:
+ StoreError: code 404 if this backup version doesn't exist
+ """
+
+ with (yield self._upload_linearizer.queue(user_id)):
+ yield self.store.delete_e2e_room_keys_version(user_id, version)
diff --git a/synapse/rest/__init__.py b/synapse/rest/__init__.py
index 3418f06fd6..4856822a5d 100644
--- a/synapse/rest/__init__.py
+++ b/synapse/rest/__init__.py
@@ -46,6 +46,7 @@ from synapse.rest.client.v2_alpha import (
receipts,
register,
report_event,
+ room_keys,
sendtodevice,
sync,
tags,
@@ -102,6 +103,7 @@ class ClientRestResource(JsonResource):
auth.register_servlets(hs, client_resource)
receipts.register_servlets(hs, client_resource)
read_marker.register_servlets(hs, client_resource)
+ room_keys.register_servlets(hs, client_resource)
keys.register_servlets(hs, client_resource)
tokenrefresh.register_servlets(hs, client_resource)
tags.register_servlets(hs, client_resource)
diff --git a/synapse/rest/client/v2_alpha/room_keys.py b/synapse/rest/client/v2_alpha/room_keys.py
new file mode 100644
index 0000000000..45b5817d8b
--- /dev/null
+++ b/synapse/rest/client/v2_alpha/room_keys.py
@@ -0,0 +1,372 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017, 2018 New Vector 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.
+
+import logging
+
+from twisted.internet import defer
+
+from synapse.api.errors import Codes, SynapseError
+from synapse.http.servlet import (
+ RestServlet,
+ parse_json_object_from_request,
+ parse_string,
+)
+
+from ._base import client_v2_patterns
+
+logger = logging.getLogger(__name__)
+
+
+class RoomKeysServlet(RestServlet):
+ PATTERNS = client_v2_patterns(
+ "/room_keys/keys(/(?P<room_id>[^/]+))?(/(?P<session_id>[^/]+))?$"
+ )
+
+ def __init__(self, hs):
+ """
+ Args:
+ hs (synapse.server.HomeServer): server
+ """
+ super(RoomKeysServlet, self).__init__()
+ self.auth = hs.get_auth()
+ self.e2e_room_keys_handler = hs.get_e2e_room_keys_handler()
+
+ @defer.inlineCallbacks
+ def on_PUT(self, request, room_id, session_id):
+ """
+ Uploads one or more encrypted E2E room keys for backup purposes.
+ room_id: the ID of the room the keys are for (optional)
+ session_id: the ID for the E2E room keys for the room (optional)
+ version: the version of the user's backup which this data is for.
+ the version must already have been created via the /room_keys/version API.
+
+ Each session has:
+ * first_message_index: a numeric index indicating the oldest message
+ encrypted by this session.
+ * forwarded_count: how many times the uploading client claims this key
+ has been shared (forwarded)
+ * is_verified: whether the client that uploaded the keys claims they
+ were sent by a device which they've verified
+ * session_data: base64-encrypted data describing the session.
+
+ Returns 200 OK on success with body {}
+ Returns 403 Forbidden if the version in question is not the most recently
+ created version (i.e. if this is an old client trying to write to a stale backup)
+ Returns 404 Not Found if the version in question doesn't exist
+
+ The API is designed to be otherwise agnostic to the room_key encryption
+ algorithm being used. Sessions are merged with existing ones in the
+ backup using the heuristics:
+ * is_verified sessions always win over unverified sessions
+ * older first_message_index always win over newer sessions
+ * lower forwarded_count always wins over higher forwarded_count
+
+ We trust the clients not to lie and corrupt their own backups.
+ It also means that if your access_token is stolen, the attacker could
+ delete your backup.
+
+ POST /room_keys/keys/!abc:matrix.org/c0ff33?version=1 HTTP/1.1
+ Content-Type: application/json
+
+ {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+
+ Or...
+
+ POST /room_keys/keys/!abc:matrix.org?version=1 HTTP/1.1
+ Content-Type: application/json
+
+ {
+ "sessions": {
+ "c0ff33": {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+ }
+ }
+
+ Or...
+
+ POST /room_keys/keys?version=1 HTTP/1.1
+ Content-Type: application/json
+
+ {
+ "rooms": {
+ "!abc:matrix.org": {
+ "sessions": {
+ "c0ff33": {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+ }
+ }
+ }
+ }
+ """
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+ body = parse_json_object_from_request(request)
+ version = parse_string(request, "version")
+
+ if session_id:
+ body = {
+ "sessions": {
+ session_id: body
+ }
+ }
+
+ if room_id:
+ body = {
+ "rooms": {
+ room_id: body
+ }
+ }
+
+ yield self.e2e_room_keys_handler.upload_room_keys(
+ user_id, version, body
+ )
+ defer.returnValue((200, {}))
+
+ @defer.inlineCallbacks
+ def on_GET(self, request, room_id, session_id):
+ """
+ Retrieves one or more encrypted E2E room keys for backup purposes.
+ Symmetric with the PUT version of the API.
+
+ room_id: the ID of the room to retrieve the keys for (optional)
+ session_id: the ID for the E2E room keys to retrieve the keys for (optional)
+ version: the version of the user's backup which this data is for.
+ the version must already have been created via the /change_secret API.
+
+ Returns as follows:
+
+ GET /room_keys/keys/!abc:matrix.org/c0ff33?version=1 HTTP/1.1
+ {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+
+ Or...
+
+ GET /room_keys/keys/!abc:matrix.org?version=1 HTTP/1.1
+ {
+ "sessions": {
+ "c0ff33": {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+ }
+ }
+
+ Or...
+
+ GET /room_keys/keys?version=1 HTTP/1.1
+ {
+ "rooms": {
+ "!abc:matrix.org": {
+ "sessions": {
+ "c0ff33": {
+ "first_message_index": 1,
+ "forwarded_count": 1,
+ "is_verified": false,
+ "session_data": "SSBBTSBBIEZJU0gK"
+ }
+ }
+ }
+ }
+ }
+ """
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+ version = parse_string(request, "version")
+
+ room_keys = yield self.e2e_room_keys_handler.get_room_keys(
+ user_id, version, room_id, session_id
+ )
+
+ if session_id:
+ room_keys = room_keys['rooms'][room_id]['sessions'][session_id]
+ elif room_id:
+ room_keys = room_keys['rooms'][room_id]
+
+ defer.returnValue((200, room_keys))
+
+ @defer.inlineCallbacks
+ def on_DELETE(self, request, room_id, session_id):
+ """
+ Deletes one or more encrypted E2E room keys for a user for backup purposes.
+
+ DELETE /room_keys/keys/!abc:matrix.org/c0ff33?version=1
+ HTTP/1.1 200 OK
+ {}
+
+ room_id: the ID of the room whose keys to delete (optional)
+ session_id: the ID for the E2E session to delete (optional)
+ version: the version of the user's backup which this data is for.
+ the version must already have been created via the /change_secret API.
+ """
+
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+ version = parse_string(request, "version")
+
+ yield self.e2e_room_keys_handler.delete_room_keys(
+ user_id, version, room_id, session_id
+ )
+ defer.returnValue((200, {}))
+
+
+class RoomKeysNewVersionServlet(RestServlet):
+ PATTERNS = client_v2_patterns(
+ "/room_keys/version$"
+ )
+
+ def __init__(self, hs):
+ """
+ Args:
+ hs (synapse.server.HomeServer): server
+ """
+ super(RoomKeysNewVersionServlet, self).__init__()
+ self.auth = hs.get_auth()
+ self.e2e_room_keys_handler = hs.get_e2e_room_keys_handler()
+
+ @defer.inlineCallbacks
+ def on_POST(self, request):
+ """
+ Create a new backup version for this user's room_keys with the given
+ info. The version is allocated by the server and returned to the user
+ in the response. This API is intended to be used whenever the user
+ changes the encryption key for their backups, ensuring that backups
+ encrypted with different keys don't collide.
+
+ It takes out an exclusive lock on this user's room_key backups, to ensure
+ clients only upload to the current backup.
+
+ The algorithm passed in the version info is a reverse-DNS namespaced
+ identifier to describe the format of the encrypted backupped keys.
+
+ The auth_data is { user_id: "user_id", nonce: <random string> }
+ encrypted using the algorithm and current encryption key described above.
+
+ POST /room_keys/version
+ Content-Type: application/json
+ {
+ "algorithm": "m.megolm_backup.v1",
+ "auth_data": "dGhpcyBzaG91bGQgYWN0dWFsbHkgYmUgZW5jcnlwdGVkIGpzb24K"
+ }
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+ {
+ "version": 12345
+ }
+ """
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+ info = parse_json_object_from_request(request)
+
+ new_version = yield self.e2e_room_keys_handler.create_version(
+ user_id, info
+ )
+ defer.returnValue((200, {"version": new_version}))
+
+ # we deliberately don't have a PUT /version, as these things really should
+ # be immutable to avoid people footgunning
+
+
+class RoomKeysVersionServlet(RestServlet):
+ PATTERNS = client_v2_patterns(
+ "/room_keys/version(/(?P<version>[^/]+))?$"
+ )
+
+ def __init__(self, hs):
+ """
+ Args:
+ hs (synapse.server.HomeServer): server
+ """
+ super(RoomKeysVersionServlet, self).__init__()
+ self.auth = hs.get_auth()
+ self.e2e_room_keys_handler = hs.get_e2e_room_keys_handler()
+
+ @defer.inlineCallbacks
+ def on_GET(self, request, version):
+ """
+ Retrieve the version information about a given version of the user's
+ room_keys backup. If the version part is missing, returns info about the
+ most current backup version (if any)
+
+ It takes out an exclusive lock on this user's room_key backups, to ensure
+ clients only upload to the current backup.
+
+ Returns 404 if the given version does not exist.
+
+ GET /room_keys/version/12345 HTTP/1.1
+ {
+ "version": "12345",
+ "algorithm": "m.megolm_backup.v1",
+ "auth_data": "dGhpcyBzaG91bGQgYWN0dWFsbHkgYmUgZW5jcnlwdGVkIGpzb24K"
+ }
+ """
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+
+ try:
+ info = yield self.e2e_room_keys_handler.get_version_info(
+ user_id, version
+ )
+ except SynapseError as e:
+ if e.code == 404:
+ raise SynapseError(404, "No backup found", Codes.NOT_FOUND)
+ defer.returnValue((200, info))
+
+ @defer.inlineCallbacks
+ def on_DELETE(self, request, version):
+ """
+ Delete the information about a given version of the user's
+ room_keys backup. If the version part is missing, deletes the most
+ current backup version (if any). Doesn't delete the actual room data.
+
+ DELETE /room_keys/version/12345 HTTP/1.1
+ HTTP/1.1 200 OK
+ {}
+ """
+ if version is None:
+ raise SynapseError(400, "No version specified to delete", Codes.NOT_FOUND)
+
+ requester = yield self.auth.get_user_by_req(request, allow_guest=False)
+ user_id = requester.user.to_string()
+
+ yield self.e2e_room_keys_handler.delete_version(
+ user_id, version
+ )
+ defer.returnValue((200, {}))
+
+
+def register_servlets(hs, http_server):
+ RoomKeysServlet(hs).register(http_server)
+ RoomKeysVersionServlet(hs).register(http_server)
+ RoomKeysNewVersionServlet(hs).register(http_server)
diff --git a/synapse/server.py b/synapse/server.py
index 938a05f9dc..3e9d3d8256 100644
--- a/synapse/server.py
+++ b/synapse/server.py
@@ -51,6 +51,7 @@ from synapse.handlers.deactivate_account import DeactivateAccountHandler
from synapse.handlers.device import DeviceHandler
from synapse.handlers.devicemessage import DeviceMessageHandler
from synapse.handlers.e2e_keys import E2eKeysHandler
+from synapse.handlers.e2e_room_keys import E2eRoomKeysHandler
from synapse.handlers.events import EventHandler, EventStreamHandler
from synapse.handlers.groups_local import GroupsLocalHandler
from synapse.handlers.initial_sync import InitialSyncHandler
@@ -130,6 +131,7 @@ class HomeServer(object):
'auth_handler',
'device_handler',
'e2e_keys_handler',
+ 'e2e_room_keys_handler',
'event_handler',
'event_stream_handler',
'initial_sync_handler',
@@ -299,6 +301,9 @@ class HomeServer(object):
def build_e2e_keys_handler(self):
return E2eKeysHandler(self)
+ def build_e2e_room_keys_handler(self):
+ return E2eRoomKeysHandler(self)
+
def build_application_service_api(self):
return ApplicationServiceApi(self)
diff --git a/synapse/storage/__init__.py b/synapse/storage/__init__.py
index 23b4a8d76d..53c685c173 100644
--- a/synapse/storage/__init__.py
+++ b/synapse/storage/__init__.py
@@ -30,6 +30,7 @@ from .appservice import ApplicationServiceStore, ApplicationServiceTransactionSt
from .client_ips import ClientIpStore
from .deviceinbox import DeviceInboxStore
from .directory import DirectoryStore
+from .e2e_room_keys import EndToEndRoomKeyStore
from .end_to_end_keys import EndToEndKeyStore
from .engines import PostgresEngine
from .event_federation import EventFederationStore
@@ -77,6 +78,7 @@ class DataStore(RoomMemberStore, RoomStore,
ApplicationServiceTransactionStore,
ReceiptsStore,
EndToEndKeyStore,
+ EndToEndRoomKeyStore,
SearchStore,
TagsStore,
AccountDataStore,
diff --git a/synapse/storage/e2e_room_keys.py b/synapse/storage/e2e_room_keys.py
new file mode 100644
index 0000000000..f25ded2295
--- /dev/null
+++ b/synapse/storage/e2e_room_keys.py
@@ -0,0 +1,320 @@
+# -*- coding: utf-8 -*-
+# Copyright 2017 New Vector 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.
+
+import json
+
+from twisted.internet import defer
+
+from synapse.api.errors import StoreError
+
+from ._base import SQLBaseStore
+
+
+class EndToEndRoomKeyStore(SQLBaseStore):
+
+ @defer.inlineCallbacks
+ def get_e2e_room_key(self, user_id, version, room_id, session_id):
+ """Get the encrypted E2E room key for a given session from a given
+ backup version of room_keys. We only store the 'best' room key for a given
+ session at a given time, as determined by the handler.
+
+ Args:
+ user_id(str): the user whose backup we're querying
+ version(str): the version ID of the backup for the set of keys we're querying
+ room_id(str): the ID of the room whose keys we're querying.
+ This is a bit redundant as it's implied by the session_id, but
+ we include for consistency with the rest of the API.
+ session_id(str): the session whose room_key we're querying.
+
+ Returns:
+ A deferred dict giving the session_data and message metadata for
+ this room key.
+ """
+
+ row = yield self._simple_select_one(
+ table="e2e_room_keys",
+ keyvalues={
+ "user_id": user_id,
+ "version": version,
+ "room_id": room_id,
+ "session_id": session_id,
+ },
+ retcols=(
+ "first_message_index",
+ "forwarded_count",
+ "is_verified",
+ "session_data",
+ ),
+ desc="get_e2e_room_key",
+ )
+
+ row["session_data"] = json.loads(row["session_data"])
+
+ defer.returnValue(row)
+
+ @defer.inlineCallbacks
+ def set_e2e_room_key(self, user_id, version, room_id, session_id, room_key):
+ """Replaces or inserts the encrypted E2E room key for a given session in
+ a given backup
+
+ Args:
+ user_id(str): the user whose backup we're setting
+ version(str): the version ID of the backup we're updating
+ room_id(str): the ID of the room whose keys we're setting
+ session_id(str): the session whose room_key we're setting
+ room_key(dict): the room_key being set
+ Raises:
+ StoreError
+ """
+
+ yield self._simple_upsert(
+ table="e2e_room_keys",
+ keyvalues={
+ "user_id": user_id,
+ "room_id": room_id,
+ "session_id": session_id,
+ },
+ values={
+ "version": version,
+ "first_message_index": room_key['first_message_index'],
+ "forwarded_count": room_key['forwarded_count'],
+ "is_verified": room_key['is_verified'],
+ "session_data": json.dumps(room_key['session_data']),
+ },
+ lock=False,
+ )
+
+ @defer.inlineCallbacks
+ def get_e2e_room_keys(
+ self, user_id, version, room_id=None, session_id=None
+ ):
+ """Bulk get the E2E room keys for a given backup, optionally filtered to a given
+ room, or a given session.
+
+ Args:
+ user_id(str): the user whose backup we're querying
+ version(str): the version ID of the backup for the set of keys we're querying
+ room_id(str): Optional. the ID of the room whose keys we're querying, if any.
+ If not specified, we return the keys for all the rooms in the backup.
+ session_id(str): Optional. the session whose room_key we're querying, if any.
+ If specified, we also require the room_id to be specified.
+ If not specified, we return all the keys in this version of
+ the backup (or for the specified room)
+
+ Returns:
+ A deferred list of dicts giving the session_data and message metadata for
+ these room keys.
+ """
+
+ keyvalues = {
+ "user_id": user_id,
+ "version": version,
+ }
+ if room_id:
+ keyvalues['room_id'] = room_id
+ if session_id:
+ keyvalues['session_id'] = session_id
+
+ rows = yield self._simple_select_list(
+ table="e2e_room_keys",
+ keyvalues=keyvalues,
+ retcols=(
+ "user_id",
+ "room_id",
+ "session_id",
+ "first_message_index",
+ "forwarded_count",
+ "is_verified",
+ "session_data",
+ ),
+ desc="get_e2e_room_keys",
+ )
+
+ sessions = {'rooms': {}}
+ for row in rows:
+ room_entry = sessions['rooms'].setdefault(row['room_id'], {"sessions": {}})
+ room_entry['sessions'][row['session_id']] = {
+ "first_message_index": row["first_message_index"],
+ "forwarded_count": row["forwarded_count"],
+ "is_verified": row["is_verified"],
+ "session_data": json.loads(row["session_data"]),
+ }
+
+ defer.returnValue(sessions)
+
+ @defer.inlineCallbacks
+ def delete_e2e_room_keys(
+ self, user_id, version, room_id=None, session_id=None
+ ):
+ """Bulk delete the E2E room keys for a given backup, optionally filtered to a given
+ room or a given session.
+
+ Args:
+ user_id(str): the user whose backup we're deleting from
+ version(str): the version ID of the backup for the set of keys we're deleting
+ room_id(str): Optional. the ID of the room whose keys we're deleting, if any.
+ If not specified, we delete the keys for all the rooms in the backup.
+ session_id(str): Optional. the session whose room_key we're querying, if any.
+ If specified, we also require the room_id to be specified.
+ If not specified, we delete all the keys in this version of
+ the backup (or for the specified room)
+
+ Returns:
+ A deferred of the deletion transaction
+ """
+
+ keyvalues = {
+ "user_id": user_id,
+ "version": version,
+ }
+ if room_id:
+ keyvalues['room_id'] = room_id
+ if session_id:
+ keyvalues['session_id'] = session_id
+
+ yield self._simple_delete(
+ table="e2e_room_keys",
+ keyvalues=keyvalues,
+ desc="delete_e2e_room_keys",
+ )
+
+ @staticmethod
+ def _get_current_version(txn, user_id):
+ txn.execute(
+ "SELECT MAX(version) FROM e2e_room_keys_versions "
+ "WHERE user_id=? AND deleted=0",
+ (user_id,)
+ )
+ row = txn.fetchone()
+ if not row:
+ raise StoreError(404, 'No current backup version')
+ return row[0]
+
+ def get_e2e_room_keys_version_info(self, user_id, version=None):
+ """Get info metadata about a version of our room_keys backup.
+
+ Args:
+ user_id(str): the user whose backup we're querying
+ version(str): Optional. the version ID of the backup we're querying about
+ If missing, we return the information about the current version.
+ Raises:
+ StoreError: with code 404 if there are no e2e_room_keys_versions present
+ Returns:
+ A deferred dict giving the info metadata for this backup version
+ """
+
+ def _get_e2e_room_keys_version_info_txn(txn):
+ if version is None:
+ this_version = self._get_current_version(txn, user_id)
+ else:
+ this_version = version
+
+ result = self._simple_select_one_txn(
+ txn,
+ table="e2e_room_keys_versions",
+ keyvalues={
+ "user_id": user_id,
+ "version": this_version,
+ "deleted": 0,
+ },
+ retcols=(
+ "version",
+ "algorithm",
+ "auth_data",
+ ),
+ )
+ result["auth_data"] = json.loads(result["auth_data"])
+ return result
+
+ return self.runInteraction(
+ "get_e2e_room_keys_version_info",
+ _get_e2e_room_keys_version_info_txn
+ )
+
+ def create_e2e_room_keys_version(self, user_id, info):
+ """Atomically creates a new version of this user's e2e_room_keys store
+ with the given version info.
+
+ Args:
+ user_id(str): the user whose backup we're creating a version
+ info(dict): the info about the backup version to be created
+
+ Returns:
+ A deferred string for the newly created version ID
+ """
+
+ def _create_e2e_room_keys_version_txn(txn):
+ txn.execute(
+ "SELECT MAX(version) FROM e2e_room_keys_versions WHERE user_id=?",
+ (user_id,)
+ )
+ current_version = txn.fetchone()[0]
+ if current_version is None:
+ current_version = '0'
+
+ new_version = str(int(current_version) + 1)
+
+ self._simple_insert_txn(
+ txn,
+ table="e2e_room_keys_versions",
+ values={
+ "user_id": user_id,
+ "version": new_version,
+ "algorithm": info["algorithm"],
+ "auth_data": json.dumps(info["auth_data"]),
+ },
+ )
+
+ return new_version
+
+ return self.runInteraction(
+ "create_e2e_room_keys_version_txn", _create_e2e_room_keys_version_txn
+ )
+
+ def delete_e2e_room_keys_version(self, user_id, version=None):
+ """Delete a given backup version of the user's room keys.
+ Doesn't delete their actual key data.
+
+ Args:
+ user_id(str): the user whose backup version we're deleting
+ version(str): Optional. the version ID of the backup version we're deleting
+ If missing, we delete the current backup version info.
+ Raises:
+ StoreError: with code 404 if there are no e2e_room_keys_versions present,
+ or if the version requested doesn't exist.
+ """
+
+ def _delete_e2e_room_keys_version_txn(txn):
+ if version is None:
+ this_version = self._get_current_version(txn, user_id)
+ else:
+ this_version = version
+
+ return self._simple_update_one_txn(
+ txn,
+ table="e2e_room_keys_versions",
+ keyvalues={
+ "user_id": user_id,
+ "version": this_version,
+ },
+ updatevalues={
+ "deleted": 1,
+ }
+ )
+
+ return self.runInteraction(
+ "delete_e2e_room_keys_version",
+ _delete_e2e_room_keys_version_txn
+ )
diff --git a/synapse/storage/schema/delta/51/e2e_room_keys.sql b/synapse/storage/schema/delta/51/e2e_room_keys.sql
new file mode 100644
index 0000000000..c0e66a697d
--- /dev/null
+++ b/synapse/storage/schema/delta/51/e2e_room_keys.sql
@@ -0,0 +1,39 @@
+/* Copyright 2017 New Vector 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.
+ */
+
+-- users' optionally backed up encrypted e2e sessions
+CREATE TABLE e2e_room_keys (
+ user_id TEXT NOT NULL,
+ room_id TEXT NOT NULL,
+ session_id TEXT NOT NULL,
+ version TEXT NOT NULL,
+ first_message_index INT,
+ forwarded_count INT,
+ is_verified BOOLEAN,
+ session_data TEXT NOT NULL
+);
+
+CREATE UNIQUE INDEX e2e_room_keys_idx ON e2e_room_keys(user_id, room_id, session_id);
+
+-- the metadata for each generation of encrypted e2e session backups
+CREATE TABLE e2e_room_keys_versions (
+ user_id TEXT NOT NULL,
+ version TEXT NOT NULL,
+ algorithm TEXT NOT NULL,
+ auth_data TEXT NOT NULL,
+ deleted SMALLINT DEFAULT 0 NOT NULL
+);
+
+CREATE UNIQUE INDEX e2e_room_keys_versions_idx ON e2e_room_keys_versions(user_id, version);
|
