623 lines
24 KiB
Python
623 lines
24 KiB
Python
# Copyright 2016 OpenMarket Ltd
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# Copyright 2019 New Vector Ltd
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from unittest import mock
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from signedjson import key as key, sign as sign
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from synapse.api.constants import RoomEncryptionAlgorithms
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from synapse.api.errors import Codes, SynapseError
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from tests import unittest
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class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
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def make_homeserver(self, reactor, clock):
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return self.setup_test_homeserver(federation_client=mock.Mock())
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def prepare(self, reactor, clock, hs):
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self.handler = hs.get_e2e_keys_handler()
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self.store = self.hs.get_datastore()
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def test_query_local_devices_no_devices(self):
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"""If the user has no devices, we expect an empty list."""
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local_user = "@boris:" + self.hs.hostname
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res = self.get_success(self.handler.query_local_devices({local_user: None}))
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self.assertDictEqual(res, {local_user: {}})
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def test_reupload_one_time_keys(self):
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"""we should be able to re-upload the same keys"""
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local_user = "@boris:" + self.hs.hostname
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device_id = "xyz"
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keys = {
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"alg1:k1": "key1",
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"alg2:k2": {"key": "key2", "signatures": {"k1": "sig1"}},
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"alg2:k3": {"key": "key3"},
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}
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res = self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": keys}
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)
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)
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self.assertDictEqual(res, {"one_time_key_counts": {"alg1": 1, "alg2": 2}})
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# we should be able to change the signature without a problem
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keys["alg2:k2"]["signatures"]["k1"] = "sig2"
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res = self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": keys}
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)
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)
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self.assertDictEqual(res, {"one_time_key_counts": {"alg1": 1, "alg2": 2}})
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def test_change_one_time_keys(self):
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"""attempts to change one-time-keys should be rejected"""
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local_user = "@boris:" + self.hs.hostname
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device_id = "xyz"
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keys = {
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"alg1:k1": "key1",
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"alg2:k2": {"key": "key2", "signatures": {"k1": "sig1"}},
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"alg2:k3": {"key": "key3"},
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}
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res = self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": keys}
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)
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)
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self.assertDictEqual(res, {"one_time_key_counts": {"alg1": 1, "alg2": 2}})
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# Error when changing string key
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self.get_failure(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": {"alg1:k1": "key2"}}
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),
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SynapseError,
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)
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# Error when replacing dict key with strin
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self.get_failure(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": {"alg2:k3": "key2"}}
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),
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SynapseError,
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)
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# Error when replacing string key with dict
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self.get_failure(
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self.handler.upload_keys_for_user(
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local_user,
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device_id,
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{"one_time_keys": {"alg1:k1": {"key": "key"}}},
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),
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SynapseError,
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)
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# Error when replacing dict key
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self.get_failure(
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self.handler.upload_keys_for_user(
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local_user,
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device_id,
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{
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"one_time_keys": {
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"alg2:k2": {"key": "key3", "signatures": {"k1": "sig1"}}
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}
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},
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),
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SynapseError,
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)
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def test_claim_one_time_key(self):
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local_user = "@boris:" + self.hs.hostname
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device_id = "xyz"
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keys = {"alg1:k1": "key1"}
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res = self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": keys}
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)
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)
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self.assertDictEqual(res, {"one_time_key_counts": {"alg1": 1}})
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res2 = self.get_success(
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self.handler.claim_one_time_keys(
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{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
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)
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)
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self.assertEqual(
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res2,
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{
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"failures": {},
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"one_time_keys": {local_user: {device_id: {"alg1:k1": "key1"}}},
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},
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)
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def test_fallback_key(self):
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local_user = "@boris:" + self.hs.hostname
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device_id = "xyz"
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fallback_key = {"alg1:k1": "key1"}
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otk = {"alg1:k2": "key2"}
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# we shouldn't have any unused fallback keys yet
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res = self.get_success(
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self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
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)
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self.assertEqual(res, [])
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self.get_success(
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self.handler.upload_keys_for_user(
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local_user,
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device_id,
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{"org.matrix.msc2732.fallback_keys": fallback_key},
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)
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)
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# we should now have an unused alg1 key
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res = self.get_success(
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self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
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)
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self.assertEqual(res, ["alg1"])
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# claiming an OTK when no OTKs are available should return the fallback
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# key
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res = self.get_success(
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self.handler.claim_one_time_keys(
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{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
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)
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)
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self.assertEqual(
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res,
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{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
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)
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# we shouldn't have any unused fallback keys again
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res = self.get_success(
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self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
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)
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self.assertEqual(res, [])
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# claiming an OTK again should return the same fallback key
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res = self.get_success(
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self.handler.claim_one_time_keys(
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{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
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)
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)
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self.assertEqual(
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res,
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{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
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)
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# if the user uploads a one-time key, the next claim should fetch the
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# one-time key, and then go back to the fallback
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self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"one_time_keys": otk}
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)
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)
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res = self.get_success(
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self.handler.claim_one_time_keys(
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{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
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)
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)
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self.assertEqual(
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res,
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{"failures": {}, "one_time_keys": {local_user: {device_id: otk}}},
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)
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res = self.get_success(
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self.handler.claim_one_time_keys(
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{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
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)
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)
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self.assertEqual(
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res,
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{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
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)
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def test_replace_master_key(self):
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"""uploading a new signing key should make the old signing key unavailable"""
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local_user = "@boris:" + self.hs.hostname
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keys1 = {
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"master_key": {
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# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
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"user_id": local_user,
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"usage": ["master"],
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"keys": {
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"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
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},
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}
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}
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self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
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keys2 = {
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"master_key": {
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# private key: 4TL4AjRYwDVwD3pqQzcor+ez/euOB1/q78aTJ+czDNs
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"user_id": local_user,
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"usage": ["master"],
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"keys": {
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"ed25519:Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw": "Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw"
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},
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}
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}
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self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys2))
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devices = self.get_success(
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self.handler.query_devices(
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{"device_keys": {local_user: []}}, 0, local_user, "device123"
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)
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)
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self.assertDictEqual(devices["master_keys"], {local_user: keys2["master_key"]})
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def test_reupload_signatures(self):
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"""re-uploading a signature should not fail"""
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local_user = "@boris:" + self.hs.hostname
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keys1 = {
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"master_key": {
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# private key: HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8
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"user_id": local_user,
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"usage": ["master"],
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"keys": {
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"ed25519:EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ": "EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ"
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},
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},
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"self_signing_key": {
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# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
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"user_id": local_user,
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"usage": ["self_signing"],
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"keys": {
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"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
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},
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},
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}
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master_signing_key = key.decode_signing_key_base64(
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"ed25519",
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"EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ",
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"HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8",
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)
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sign.sign_json(keys1["self_signing_key"], local_user, master_signing_key)
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signing_key = key.decode_signing_key_base64(
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"ed25519",
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"nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk",
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"2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0",
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)
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self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
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# upload two device keys, which will be signed later by the self-signing key
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device_key_1 = {
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"user_id": local_user,
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"device_id": "abc",
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"algorithms": [
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"m.olm.curve25519-aes-sha2",
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RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
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],
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"keys": {
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"ed25519:abc": "base64+ed25519+key",
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"curve25519:abc": "base64+curve25519+key",
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},
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"signatures": {local_user: {"ed25519:abc": "base64+signature"}},
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}
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device_key_2 = {
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"user_id": local_user,
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"device_id": "def",
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"algorithms": [
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"m.olm.curve25519-aes-sha2",
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RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
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],
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"keys": {
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"ed25519:def": "base64+ed25519+key",
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"curve25519:def": "base64+curve25519+key",
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},
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"signatures": {local_user: {"ed25519:def": "base64+signature"}},
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}
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self.get_success(
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self.handler.upload_keys_for_user(
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local_user, "abc", {"device_keys": device_key_1}
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)
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)
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self.get_success(
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self.handler.upload_keys_for_user(
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local_user, "def", {"device_keys": device_key_2}
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)
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)
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# sign the first device key and upload it
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del device_key_1["signatures"]
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sign.sign_json(device_key_1, local_user, signing_key)
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self.get_success(
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self.handler.upload_signatures_for_device_keys(
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local_user, {local_user: {"abc": device_key_1}}
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)
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)
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# sign the second device key and upload both device keys. The server
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# should ignore the first device key since it already has a valid
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# signature for it
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del device_key_2["signatures"]
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sign.sign_json(device_key_2, local_user, signing_key)
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self.get_success(
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self.handler.upload_signatures_for_device_keys(
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local_user, {local_user: {"abc": device_key_1, "def": device_key_2}}
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)
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)
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device_key_1["signatures"][local_user]["ed25519:abc"] = "base64+signature"
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device_key_2["signatures"][local_user]["ed25519:def"] = "base64+signature"
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devices = self.get_success(
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self.handler.query_devices(
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{"device_keys": {local_user: []}}, 0, local_user, "device123"
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)
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)
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del devices["device_keys"][local_user]["abc"]["unsigned"]
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del devices["device_keys"][local_user]["def"]["unsigned"]
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self.assertDictEqual(devices["device_keys"][local_user]["abc"], device_key_1)
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self.assertDictEqual(devices["device_keys"][local_user]["def"], device_key_2)
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def test_self_signing_key_doesnt_show_up_as_device(self):
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"""signing keys should be hidden when fetching a user's devices"""
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local_user = "@boris:" + self.hs.hostname
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keys1 = {
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"master_key": {
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# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
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"user_id": local_user,
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"usage": ["master"],
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"keys": {
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"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
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},
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}
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}
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self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
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e = self.get_failure(
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self.hs.get_device_handler().check_device_registered(
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user_id=local_user,
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device_id="nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk",
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initial_device_display_name="new display name",
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),
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SynapseError,
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)
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res = e.value.code
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self.assertEqual(res, 400)
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res = self.get_success(self.handler.query_local_devices({local_user: None}))
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self.assertDictEqual(res, {local_user: {}})
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def test_upload_signatures(self):
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"""should check signatures that are uploaded"""
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# set up a user with cross-signing keys and a device. This user will
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# try uploading signatures
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local_user = "@boris:" + self.hs.hostname
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device_id = "xyz"
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# private key: OMkooTr76ega06xNvXIGPbgvvxAOzmQncN8VObS7aBA
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device_pubkey = "NnHhnqiMFQkq969szYkooLaBAXW244ZOxgukCvm2ZeY"
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device_key = {
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"user_id": local_user,
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"device_id": device_id,
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"algorithms": [
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"m.olm.curve25519-aes-sha2",
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RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
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],
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"keys": {"curve25519:xyz": "curve25519+key", "ed25519:xyz": device_pubkey},
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"signatures": {local_user: {"ed25519:xyz": "something"}},
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}
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device_signing_key = key.decode_signing_key_base64(
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"ed25519", "xyz", "OMkooTr76ega06xNvXIGPbgvvxAOzmQncN8VObS7aBA"
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)
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self.get_success(
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self.handler.upload_keys_for_user(
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local_user, device_id, {"device_keys": device_key}
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)
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)
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# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
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master_pubkey = "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
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master_key = {
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"user_id": local_user,
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"usage": ["master"],
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"keys": {"ed25519:" + master_pubkey: master_pubkey},
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}
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master_signing_key = key.decode_signing_key_base64(
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"ed25519", master_pubkey, "2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0"
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)
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usersigning_pubkey = "Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw"
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usersigning_key = {
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# private key: 4TL4AjRYwDVwD3pqQzcor+ez/euOB1/q78aTJ+czDNs
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"user_id": local_user,
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"usage": ["user_signing"],
|
|
"keys": {"ed25519:" + usersigning_pubkey: usersigning_pubkey},
|
|
}
|
|
usersigning_signing_key = key.decode_signing_key_base64(
|
|
"ed25519", usersigning_pubkey, "4TL4AjRYwDVwD3pqQzcor+ez/euOB1/q78aTJ+czDNs"
|
|
)
|
|
sign.sign_json(usersigning_key, local_user, master_signing_key)
|
|
# private key: HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8
|
|
selfsigning_pubkey = "EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ"
|
|
selfsigning_key = {
|
|
"user_id": local_user,
|
|
"usage": ["self_signing"],
|
|
"keys": {"ed25519:" + selfsigning_pubkey: selfsigning_pubkey},
|
|
}
|
|
selfsigning_signing_key = key.decode_signing_key_base64(
|
|
"ed25519", selfsigning_pubkey, "HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8"
|
|
)
|
|
sign.sign_json(selfsigning_key, local_user, master_signing_key)
|
|
cross_signing_keys = {
|
|
"master_key": master_key,
|
|
"user_signing_key": usersigning_key,
|
|
"self_signing_key": selfsigning_key,
|
|
}
|
|
self.get_success(
|
|
self.handler.upload_signing_keys_for_user(local_user, cross_signing_keys)
|
|
)
|
|
|
|
# set up another user with a master key. This user will be signed by
|
|
# the first user
|
|
other_user = "@otherboris:" + self.hs.hostname
|
|
other_master_pubkey = "fHZ3NPiKxoLQm5OoZbKa99SYxprOjNs4TwJUKP+twCM"
|
|
other_master_key = {
|
|
# private key: oyw2ZUx0O4GifbfFYM0nQvj9CL0b8B7cyN4FprtK8OI
|
|
"user_id": other_user,
|
|
"usage": ["master"],
|
|
"keys": {"ed25519:" + other_master_pubkey: other_master_pubkey},
|
|
}
|
|
self.get_success(
|
|
self.handler.upload_signing_keys_for_user(
|
|
other_user, {"master_key": other_master_key}
|
|
)
|
|
)
|
|
|
|
# test various signature failures (see below)
|
|
ret = self.get_success(
|
|
self.handler.upload_signatures_for_device_keys(
|
|
local_user,
|
|
{
|
|
local_user: {
|
|
# fails because the signature is invalid
|
|
# should fail with INVALID_SIGNATURE
|
|
device_id: {
|
|
"user_id": local_user,
|
|
"device_id": device_id,
|
|
"algorithms": [
|
|
"m.olm.curve25519-aes-sha2",
|
|
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
|
|
],
|
|
"keys": {
|
|
"curve25519:xyz": "curve25519+key",
|
|
# private key: OMkooTr76ega06xNvXIGPbgvvxAOzmQncN8VObS7aBA
|
|
"ed25519:xyz": device_pubkey,
|
|
},
|
|
"signatures": {
|
|
local_user: {
|
|
"ed25519:" + selfsigning_pubkey: "something"
|
|
}
|
|
},
|
|
},
|
|
# fails because device is unknown
|
|
# should fail with NOT_FOUND
|
|
"unknown": {
|
|
"user_id": local_user,
|
|
"device_id": "unknown",
|
|
"signatures": {
|
|
local_user: {
|
|
"ed25519:" + selfsigning_pubkey: "something"
|
|
}
|
|
},
|
|
},
|
|
# fails because the signature is invalid
|
|
# should fail with INVALID_SIGNATURE
|
|
master_pubkey: {
|
|
"user_id": local_user,
|
|
"usage": ["master"],
|
|
"keys": {"ed25519:" + master_pubkey: master_pubkey},
|
|
"signatures": {
|
|
local_user: {"ed25519:" + device_pubkey: "something"}
|
|
},
|
|
},
|
|
},
|
|
other_user: {
|
|
# fails because the device is not the user's master-signing key
|
|
# should fail with NOT_FOUND
|
|
"unknown": {
|
|
"user_id": other_user,
|
|
"device_id": "unknown",
|
|
"signatures": {
|
|
local_user: {
|
|
"ed25519:" + usersigning_pubkey: "something"
|
|
}
|
|
},
|
|
},
|
|
other_master_pubkey: {
|
|
# fails because the key doesn't match what the server has
|
|
# should fail with UNKNOWN
|
|
"user_id": other_user,
|
|
"usage": ["master"],
|
|
"keys": {
|
|
"ed25519:" + other_master_pubkey: other_master_pubkey
|
|
},
|
|
"something": "random",
|
|
"signatures": {
|
|
local_user: {
|
|
"ed25519:" + usersigning_pubkey: "something"
|
|
}
|
|
},
|
|
},
|
|
},
|
|
},
|
|
)
|
|
)
|
|
|
|
user_failures = ret["failures"][local_user]
|
|
self.assertEqual(user_failures[device_id]["errcode"], Codes.INVALID_SIGNATURE)
|
|
self.assertEqual(
|
|
user_failures[master_pubkey]["errcode"], Codes.INVALID_SIGNATURE
|
|
)
|
|
self.assertEqual(user_failures["unknown"]["errcode"], Codes.NOT_FOUND)
|
|
|
|
other_user_failures = ret["failures"][other_user]
|
|
self.assertEqual(other_user_failures["unknown"]["errcode"], Codes.NOT_FOUND)
|
|
self.assertEqual(
|
|
other_user_failures[other_master_pubkey]["errcode"], Codes.UNKNOWN
|
|
)
|
|
|
|
# test successful signatures
|
|
del device_key["signatures"]
|
|
sign.sign_json(device_key, local_user, selfsigning_signing_key)
|
|
sign.sign_json(master_key, local_user, device_signing_key)
|
|
sign.sign_json(other_master_key, local_user, usersigning_signing_key)
|
|
ret = self.get_success(
|
|
self.handler.upload_signatures_for_device_keys(
|
|
local_user,
|
|
{
|
|
local_user: {device_id: device_key, master_pubkey: master_key},
|
|
other_user: {other_master_pubkey: other_master_key},
|
|
},
|
|
)
|
|
)
|
|
|
|
self.assertEqual(ret["failures"], {})
|
|
|
|
# fetch the signed keys/devices and make sure that the signatures are there
|
|
ret = self.get_success(
|
|
self.handler.query_devices(
|
|
{"device_keys": {local_user: [], other_user: []}},
|
|
0,
|
|
local_user,
|
|
"device123",
|
|
)
|
|
)
|
|
|
|
self.assertEqual(
|
|
ret["device_keys"][local_user]["xyz"]["signatures"][local_user][
|
|
"ed25519:" + selfsigning_pubkey
|
|
],
|
|
device_key["signatures"][local_user]["ed25519:" + selfsigning_pubkey],
|
|
)
|
|
self.assertEqual(
|
|
ret["master_keys"][local_user]["signatures"][local_user][
|
|
"ed25519:" + device_id
|
|
],
|
|
master_key["signatures"][local_user]["ed25519:" + device_id],
|
|
)
|
|
self.assertEqual(
|
|
ret["master_keys"][other_user]["signatures"][local_user][
|
|
"ed25519:" + usersigning_pubkey
|
|
],
|
|
other_master_key["signatures"][local_user]["ed25519:" + usersigning_pubkey],
|
|
)
|