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synapse/tests/handlers/test_e2e_keys.py
David Robertson fdce83ee60
Claim fallback keys in bulk (#16570)
2023-10-30 14:34:37 +00:00

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Python
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# Copyright 2016 OpenMarket Ltd
# Copyright 2019 New Vector Ltd
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# 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 typing import Dict, Iterable
from unittest import mock
from parameterized import parameterized
from signedjson import key as key, sign as sign
from twisted.test.proto_helpers import MemoryReactor
from synapse.api.constants import RoomEncryptionAlgorithms
from synapse.api.errors import Codes, SynapseError
from synapse.appservice import ApplicationService
from synapse.handlers.device import DeviceHandler
from synapse.server import HomeServer
from synapse.storage.databases.main.appservice import _make_exclusive_regex
from synapse.types import JsonDict, UserID
from synapse.util import Clock
from tests import unittest
from tests.unittest import override_config
class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
self.appservice_api = mock.AsyncMock()
return self.setup_test_homeserver(
federation_client=mock.Mock(), application_service_api=self.appservice_api
)
def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
self.handler = hs.get_e2e_keys_handler()
self.store = self.hs.get_datastores().main
self.requester = UserID.from_string(f"@test_requester:{self.hs.hostname}")
def test_query_local_devices_no_devices(self) -> None:
"""If the user has no devices, we expect an empty list."""
local_user = "@boris:" + self.hs.hostname
res = self.get_success(self.handler.query_local_devices({local_user: None}))
self.assertDictEqual(res, {local_user: {}})
def test_reupload_one_time_keys(self) -> None:
"""we should be able to re-upload the same keys"""
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
keys: JsonDict = {
"alg1:k1": "key1",
"alg2:k2": {"key": "key2", "signatures": {"k1": "sig1"}},
"alg2:k3": {"key": "key3"},
}
# Note that "signed_curve25519" is always returned in key count responses. This is necessary until
# https://github.com/matrix-org/matrix-doc/issues/3298 is fixed.
res = self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": keys}
)
)
self.assertDictEqual(
res, {"one_time_key_counts": {"alg1": 1, "alg2": 2, "signed_curve25519": 0}}
)
# we should be able to change the signature without a problem
keys["alg2:k2"]["signatures"]["k1"] = "sig2"
res = self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": keys}
)
)
self.assertDictEqual(
res, {"one_time_key_counts": {"alg1": 1, "alg2": 2, "signed_curve25519": 0}}
)
def test_change_one_time_keys(self) -> None:
"""attempts to change one-time-keys should be rejected"""
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
keys = {
"alg1:k1": "key1",
"alg2:k2": {"key": "key2", "signatures": {"k1": "sig1"}},
"alg2:k3": {"key": "key3"},
}
res = self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": keys}
)
)
self.assertDictEqual(
res, {"one_time_key_counts": {"alg1": 1, "alg2": 2, "signed_curve25519": 0}}
)
# Error when changing string key
self.get_failure(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": {"alg1:k1": "key2"}}
),
SynapseError,
)
# Error when replacing dict key with string
self.get_failure(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": {"alg2:k3": "key2"}}
),
SynapseError,
)
# Error when replacing string key with dict
self.get_failure(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"one_time_keys": {"alg1:k1": {"key": "key"}}},
),
SynapseError,
)
# Error when replacing dict key
self.get_failure(
self.handler.upload_keys_for_user(
local_user,
device_id,
{
"one_time_keys": {
"alg2:k2": {"key": "key3", "signatures": {"k1": "sig1"}}
}
},
),
SynapseError,
)
def test_claim_one_time_key(self) -> None:
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
keys = {"alg1:k1": "key1"}
res = self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": keys}
)
)
self.assertDictEqual(
res, {"one_time_key_counts": {"alg1": 1, "signed_curve25519": 0}}
)
res2 = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
res2,
{
"failures": {},
"one_time_keys": {local_user: {device_id: {"alg1:k1": "key1"}}},
},
)
def test_fallback_key(self) -> None:
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
fallback_key = {"alg1:k1": "fallback_key1"}
fallback_key2 = {"alg1:k2": "fallback_key2"}
fallback_key3 = {"alg1:k2": "fallback_key3"}
otk = {"alg1:k2": "key2"}
# we shouldn't have any unused fallback keys yet
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, [])
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"fallback_keys": fallback_key},
)
)
# we should now have an unused alg1 key
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(fallback_res, ["alg1"])
# claiming an OTK when no OTKs are available should return the fallback
# key
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# we shouldn't have any unused fallback keys again
unused_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(unused_res, [])
# claiming an OTK again should return the same fallback key
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# re-uploading the same fallback key should still result in no unused fallback
# keys
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"fallback_keys": fallback_key},
)
)
unused_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(unused_res, [])
# uploading a new fallback key should result in an unused fallback key
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"fallback_keys": fallback_key2},
)
)
unused_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(unused_res, ["alg1"])
# if the user uploads a one-time key, the next claim should fetch the
# one-time key, and then go back to the fallback
self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": otk}
)
)
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: otk}}},
)
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key2}}},
)
# using the unstable prefix should also set the fallback key
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"org.matrix.msc2732.fallback_keys": fallback_key3},
)
)
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key3}}},
)
def test_fallback_key_bulk(self) -> None:
"""Like test_fallback_key, but claims multiple keys in one handler call."""
alice = f"@alice:{self.hs.hostname}"
brian = f"@brian:{self.hs.hostname}"
chris = f"@chris:{self.hs.hostname}"
# Have three users upload fallback keys for two devices.
fallback_keys = {
alice: {
"alice_dev_1": {"alg1:k1": "fallback_key1"},
"alice_dev_2": {"alg2:k2": "fallback_key2"},
},
brian: {
"brian_dev_1": {"alg1:k3": "fallback_key3"},
"brian_dev_2": {"alg2:k4": "fallback_key4"},
},
chris: {
"chris_dev_1": {"alg1:k5": "fallback_key5"},
"chris_dev_2": {"alg2:k6": "fallback_key6"},
},
}
for user_id, devices in fallback_keys.items():
for device_id, key_dict in devices.items():
self.get_success(
self.handler.upload_keys_for_user(
user_id,
device_id,
{"fallback_keys": key_dict},
)
)
# Each device should have an unused fallback key.
for user_id, devices in fallback_keys.items():
for device_id in devices:
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(user_id, device_id)
)
expected_algorithm_name = f"alg{device_id[-1]}"
self.assertEqual(fallback_res, [expected_algorithm_name])
# Claim the fallback key for one device per user.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{
alice: {"alice_dev_1": {"alg1": 1}},
brian: {"brian_dev_2": {"alg2": 1}},
chris: {"chris_dev_2": {"alg2": 1}},
},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
expected_claims = {
alice: {"alice_dev_1": {"alg1:k1": "fallback_key1"}},
brian: {"brian_dev_2": {"alg2:k4": "fallback_key4"}},
chris: {"chris_dev_2": {"alg2:k6": "fallback_key6"}},
}
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": expected_claims},
)
for user_id, devices in fallback_keys.items():
for device_id in devices:
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(user_id, device_id)
)
# Claimed fallback keys should no longer show up as unused.
# Unclaimed fallback keys should still be unused.
if device_id in expected_claims[user_id]:
self.assertEqual(fallback_res, [])
else:
expected_algorithm_name = f"alg{device_id[-1]}"
self.assertEqual(fallback_res, [expected_algorithm_name])
def test_fallback_key_always_returned(self) -> None:
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
fallback_key = {"alg1:k1": "fallback_key1"}
otk = {"alg1:k2": "key2"}
# we shouldn't have any unused fallback keys yet
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, [])
# Upload a OTK & fallback key.
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"one_time_keys": otk, "fallback_keys": fallback_key},
)
)
# we should now have an unused alg1 key
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(fallback_res, ["alg1"])
# Claiming an OTK and requesting to always return the fallback key should
# return both.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {local_user: {device_id: {**fallback_key, **otk}}},
},
)
# This should not mark the key as used.
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(fallback_res, ["alg1"])
# Claiming an OTK again should return only the fallback key.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# And mark it as used.
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(fallback_res, [])
def test_replace_master_key(self) -> None:
"""uploading a new signing key should make the old signing key unavailable"""
local_user = "@boris:" + self.hs.hostname
keys1 = {
"master_key": {
# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
"user_id": local_user,
"usage": ["master"],
"keys": {
"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
},
}
}
self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
keys2 = {
"master_key": {
# private key: 4TL4AjRYwDVwD3pqQzcor+ez/euOB1/q78aTJ+czDNs
"user_id": local_user,
"usage": ["master"],
"keys": {
"ed25519:Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw": "Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw"
},
}
}
self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys2))
devices = self.get_success(
self.handler.query_devices(
{"device_keys": {local_user: []}}, 0, local_user, "device123"
)
)
self.assertDictEqual(devices["master_keys"], {local_user: keys2["master_key"]})
def test_reupload_signatures(self) -> None:
"""re-uploading a signature should not fail"""
local_user = "@boris:" + self.hs.hostname
keys1 = {
"master_key": {
# private key: HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8
"user_id": local_user,
"usage": ["master"],
"keys": {
"ed25519:EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ": "EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ"
},
},
"self_signing_key": {
# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
"user_id": local_user,
"usage": ["self_signing"],
"keys": {
"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
},
},
}
master_signing_key = key.decode_signing_key_base64(
"ed25519",
"EmkqvokUn8p+vQAGZitOk4PWjp7Ukp3txV2TbMPEiBQ",
"HvQBbU+hc2Zr+JP1sE0XwBe1pfZZEYtJNPJLZJtS+F8",
)
sign.sign_json(keys1["self_signing_key"], local_user, master_signing_key)
signing_key = key.decode_signing_key_base64(
"ed25519",
"nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk",
"2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0",
)
self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
# upload two device keys, which will be signed later by the self-signing key
device_key_1: JsonDict = {
"user_id": local_user,
"device_id": "abc",
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {
"ed25519:abc": "base64+ed25519+key",
"curve25519:abc": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:abc": "base64+signature"}},
}
device_key_2: JsonDict = {
"user_id": local_user,
"device_id": "def",
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {
"ed25519:def": "base64+ed25519+key",
"curve25519:def": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:def": "base64+signature"}},
}
self.get_success(
self.handler.upload_keys_for_user(
local_user, "abc", {"device_keys": device_key_1}
)
)
self.get_success(
self.handler.upload_keys_for_user(
local_user, "def", {"device_keys": device_key_2}
)
)
# sign the first device key and upload it
del device_key_1["signatures"]
sign.sign_json(device_key_1, local_user, signing_key)
self.get_success(
self.handler.upload_signatures_for_device_keys(
local_user, {local_user: {"abc": device_key_1}}
)
)
# sign the second device key and upload both device keys. The server
# should ignore the first device key since it already has a valid
# signature for it
del device_key_2["signatures"]
sign.sign_json(device_key_2, local_user, signing_key)
self.get_success(
self.handler.upload_signatures_for_device_keys(
local_user, {local_user: {"abc": device_key_1, "def": device_key_2}}
)
)
device_key_1["signatures"][local_user]["ed25519:abc"] = "base64+signature"
device_key_2["signatures"][local_user]["ed25519:def"] = "base64+signature"
devices = self.get_success(
self.handler.query_devices(
{"device_keys": {local_user: []}}, 0, local_user, "device123"
)
)
del devices["device_keys"][local_user]["abc"]["unsigned"]
del devices["device_keys"][local_user]["def"]["unsigned"]
self.assertDictEqual(devices["device_keys"][local_user]["abc"], device_key_1)
self.assertDictEqual(devices["device_keys"][local_user]["def"], device_key_2)
def test_self_signing_key_doesnt_show_up_as_device(self) -> None:
"""signing keys should be hidden when fetching a user's devices"""
local_user = "@boris:" + self.hs.hostname
keys1 = {
"master_key": {
# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
"user_id": local_user,
"usage": ["master"],
"keys": {
"ed25519:nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk": "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
},
}
}
self.get_success(self.handler.upload_signing_keys_for_user(local_user, keys1))
device_handler = self.hs.get_device_handler()
assert isinstance(device_handler, DeviceHandler)
e = self.get_failure(
device_handler.check_device_registered(
user_id=local_user,
device_id="nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk",
initial_device_display_name="new display name",
),
SynapseError,
)
res = e.value.code
self.assertEqual(res, 400)
query_res = self.get_success(
self.handler.query_local_devices({local_user: None})
)
self.assertDictEqual(query_res, {local_user: {}})
def test_upload_signatures(self) -> None:
"""should check signatures that are uploaded"""
# set up a user with cross-signing keys and a device. This user will
# try uploading signatures
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
# private key: OMkooTr76ega06xNvXIGPbgvvxAOzmQncN8VObS7aBA
device_pubkey = "NnHhnqiMFQkq969szYkooLaBAXW244ZOxgukCvm2ZeY"
device_key: JsonDict = {
"user_id": local_user,
"device_id": device_id,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {"curve25519:xyz": "curve25519+key", "ed25519:xyz": device_pubkey},
"signatures": {local_user: {"ed25519:xyz": "something"}},
}
device_signing_key = key.decode_signing_key_base64(
"ed25519", "xyz", "OMkooTr76ega06xNvXIGPbgvvxAOzmQncN8VObS7aBA"
)
self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"device_keys": device_key}
)
)
# private key: 2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0
master_pubkey = "nqOvzeuGWT/sRx3h7+MHoInYj3Uk2LD/unI9kDYcHwk"
master_key: JsonDict = {
"user_id": local_user,
"usage": ["master"],
"keys": {"ed25519:" + master_pubkey: master_pubkey},
}
master_signing_key = key.decode_signing_key_base64(
"ed25519", master_pubkey, "2lonYOM6xYKdEsO+6KrC766xBcHnYnim1x/4LFGF8B0"
)
usersigning_pubkey = "Hq6gL+utB4ET+UvD5ci0kgAwsX6qP/zvf8v6OInU5iw"
usersigning_key = {
# private key: 4TL4AjRYwDVwD3pqQzcor+ez/euOB1/q78aTJ+czDNs
"user_id": local_user,
"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: JsonDict = {
# 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],
)
def test_query_devices_remote_no_sync(self) -> None:
"""Tests that querying keys for a remote user that we don't share a room
with returns the cross signing keys correctly.
"""
remote_user_id = "@test:other"
local_user_id = "@test:test"
remote_master_key = "85T7JXPFBAySB/jwby4S3lBPTqY3+Zg53nYuGmu1ggY"
remote_self_signing_key = "QeIiFEjluPBtI7WQdG365QKZcFs9kqmHir6RBD0//nQ"
self.hs.get_federation_client().query_client_keys = mock.AsyncMock( # type: ignore[method-assign]
return_value={
"device_keys": {remote_user_id: {}},
"master_keys": {
remote_user_id: {
"user_id": remote_user_id,
"usage": ["master"],
"keys": {"ed25519:" + remote_master_key: remote_master_key},
},
},
"self_signing_keys": {
remote_user_id: {
"user_id": remote_user_id,
"usage": ["self_signing"],
"keys": {
"ed25519:"
+ remote_self_signing_key: remote_self_signing_key
},
}
},
}
)
e2e_handler = self.hs.get_e2e_keys_handler()
query_result = self.get_success(
e2e_handler.query_devices(
{
"device_keys": {remote_user_id: []},
},
timeout=10,
from_user_id=local_user_id,
from_device_id="some_device_id",
)
)
self.assertEqual(query_result["failures"], {})
self.assertEqual(
query_result["master_keys"],
{
remote_user_id: {
"user_id": remote_user_id,
"usage": ["master"],
"keys": {"ed25519:" + remote_master_key: remote_master_key},
},
},
)
self.assertEqual(
query_result["self_signing_keys"],
{
remote_user_id: {
"user_id": remote_user_id,
"usage": ["self_signing"],
"keys": {
"ed25519:" + remote_self_signing_key: remote_self_signing_key
},
}
},
)
def test_query_devices_remote_sync(self) -> None:
"""Tests that querying keys for a remote user that we share a room with,
but haven't yet fetched the keys for, returns the cross signing keys
correctly.
"""
remote_user_id = "@test:other"
local_user_id = "@test:test"
# Pretend we're sharing a room with the user we're querying. If not,
# `_query_devices_for_destination` will return early.
self.store.get_rooms_for_user = mock.AsyncMock(return_value={"some_room_id"})
remote_master_key = "85T7JXPFBAySB/jwby4S3lBPTqY3+Zg53nYuGmu1ggY"
remote_self_signing_key = "QeIiFEjluPBtI7WQdG365QKZcFs9kqmHir6RBD0//nQ"
self.hs.get_federation_client().query_user_devices = mock.AsyncMock( # type: ignore[method-assign]
return_value={
"user_id": remote_user_id,
"stream_id": 1,
"devices": [],
"master_key": {
"user_id": remote_user_id,
"usage": ["master"],
"keys": {"ed25519:" + remote_master_key: remote_master_key},
},
"self_signing_key": {
"user_id": remote_user_id,
"usage": ["self_signing"],
"keys": {
"ed25519:" + remote_self_signing_key: remote_self_signing_key
},
},
}
)
e2e_handler = self.hs.get_e2e_keys_handler()
query_result = self.get_success(
e2e_handler.query_devices(
{
"device_keys": {remote_user_id: []},
},
timeout=10,
from_user_id=local_user_id,
from_device_id="some_device_id",
)
)
self.assertEqual(query_result["failures"], {})
self.assertEqual(
query_result["master_keys"],
{
remote_user_id: {
"user_id": remote_user_id,
"usage": ["master"],
"keys": {"ed25519:" + remote_master_key: remote_master_key},
}
},
)
self.assertEqual(
query_result["self_signing_keys"],
{
remote_user_id: {
"user_id": remote_user_id,
"usage": ["self_signing"],
"keys": {
"ed25519:" + remote_self_signing_key: remote_self_signing_key
},
}
},
)
@parameterized.expand(
[
# The remote homeserver's response indicates that this user has 0/1/2 devices.
([],),
(["device_1"],),
(["device_1", "device_2"],),
]
)
def test_query_all_devices_caches_result(self, device_ids: Iterable[str]) -> None:
"""Test that requests for all of a remote user's devices are cached.
We do this by asserting that only one call over federation was made, and that
the two queries to the local homeserver produce the same response.
"""
local_user_id = "@test:test"
remote_user_id = "@test:other"
request_body: JsonDict = {"device_keys": {remote_user_id: []}}
response_devices = [
{
"device_id": device_id,
"keys": {
"algorithms": ["dummy"],
"device_id": device_id,
"keys": {f"dummy:{device_id}": "dummy"},
"signatures": {device_id: {f"dummy:{device_id}": "dummy"}},
"unsigned": {},
"user_id": "@test:other",
},
}
for device_id in device_ids
]
response_body = {
"devices": response_devices,
"user_id": remote_user_id,
"stream_id": 12345, # an integer, according to the spec
}
e2e_handler = self.hs.get_e2e_keys_handler()
# Pretend we're sharing a room with the user we're querying. If not,
# `_query_devices_for_destination` will return early.
mock_get_rooms = mock.patch.object(
self.store,
"get_rooms_for_user",
new_callable=mock.AsyncMock,
return_value=["some_room_id"],
)
mock_get_users = mock.patch.object(
self.store,
"get_users_server_still_shares_room_with",
new_callable=mock.AsyncMock,
return_value={remote_user_id},
)
mock_request = mock.patch.object(
self.hs.get_federation_client(),
"query_user_devices",
new_callable=mock.AsyncMock,
return_value=response_body,
)
with mock_get_rooms, mock_get_users, mock_request as mocked_federation_request:
# Make the first query and sanity check it succeeds.
response_1 = self.get_success(
e2e_handler.query_devices(
request_body,
timeout=10,
from_user_id=local_user_id,
from_device_id="some_device_id",
)
)
self.assertEqual(response_1["failures"], {})
# We should have made a federation request to do so.
mocked_federation_request.assert_called_once()
# Reset the mock so we can prove we don't make a second federation request.
mocked_federation_request.reset_mock()
# Repeat the query.
response_2 = self.get_success(
e2e_handler.query_devices(
request_body,
timeout=10,
from_user_id=local_user_id,
from_device_id="some_device_id",
)
)
self.assertEqual(response_2["failures"], {})
# We should not have made a second federation request.
mocked_federation_request.assert_not_called()
# The two requests to the local homeserver should be identical.
self.assertEqual(response_1, response_2)
@override_config({"experimental_features": {"msc3983_appservice_otk_claims": True}})
def test_query_appservice(self) -> None:
local_user = "@boris:" + self.hs.hostname
device_id_1 = "xyz"
fallback_key = {"alg1:k1": "fallback_key1"}
device_id_2 = "abc"
otk = {"alg1:k2": "key2"}
# Inject an appservice interested in this user.
appservice = ApplicationService(
token="i_am_an_app_service",
id="1234",
namespaces={"users": [{"regex": r"@boris:.+", "exclusive": True}]},
# Note: this user does not have to match the regex above
sender="@as_main:test",
)
self.hs.get_datastores().main.services_cache = [appservice]
self.hs.get_datastores().main.exclusive_user_regex = _make_exclusive_regex(
[appservice]
)
# Setup a response, but only for device 2.
self.appservice_api.claim_client_keys.return_value = (
{local_user: {device_id_2: otk}},
[(local_user, device_id_1, "alg1", 1)],
)
# we shouldn't have any unused fallback keys yet
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(res, [])
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id_1,
{"fallback_keys": fallback_key},
)
)
# we should now have an unused alg1 key
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(fallback_res, ["alg1"])
# claiming an OTK when no OTKs are available should ask the appservice, then
# query the fallback keys.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id_1: {"alg1": 1}, device_id_2: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=False,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {
local_user: {device_id_1: fallback_key, device_id_2: otk}
},
},
)
@override_config({"experimental_features": {"msc3983_appservice_otk_claims": True}})
def test_query_appservice_with_fallback(self) -> None:
local_user = "@boris:" + self.hs.hostname
device_id_1 = "xyz"
fallback_key = {"alg1:k1": {"desc": "fallback_key1", "fallback": True}}
otk = {"alg1:k2": {"desc": "key2"}}
as_fallback_key = {"alg1:k3": {"desc": "fallback_key3", "fallback": True}}
as_otk = {"alg1:k4": {"desc": "key4"}}
# Inject an appservice interested in this user.
appservice = ApplicationService(
token="i_am_an_app_service",
id="1234",
namespaces={"users": [{"regex": r"@boris:.+", "exclusive": True}]},
# Note: this user does not have to match the regex above
sender="@as_main:test",
)
self.hs.get_datastores().main.services_cache = [appservice]
self.hs.get_datastores().main.exclusive_user_regex = _make_exclusive_regex(
[appservice]
)
# Setup a response.
response: Dict[str, Dict[str, Dict[str, JsonDict]]] = {
local_user: {device_id_1: {**as_otk, **as_fallback_key}}
}
self.appservice_api.claim_client_keys.return_value = (response, [])
# Claim OTKs, which will ask the appservice and do nothing else.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id_1: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {
local_user: {device_id_1: {**as_otk, **as_fallback_key}}
},
},
)
# Now upload a fallback key.
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(res, [])
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id_1,
{"fallback_keys": fallback_key},
)
)
# we should now have an unused alg1 key
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(fallback_res, ["alg1"])
# The appservice will return only the OTK.
self.appservice_api.claim_client_keys.return_value = (
{local_user: {device_id_1: as_otk}},
[],
)
# Claim OTKs, which should return the OTK from the appservice and the
# uploaded fallback key.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id_1: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {
local_user: {device_id_1: {**as_otk, **fallback_key}}
},
},
)
# But the fallback key should not be marked as used.
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(fallback_res, ["alg1"])
# Now upload a OTK.
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id_1,
{"one_time_keys": otk},
)
)
# Claim OTKs, which will return information only from the database.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id_1: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {local_user: {device_id_1: {**otk, **fallback_key}}},
},
)
# But the fallback key should not be marked as used.
fallback_res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id_1)
)
self.assertEqual(fallback_res, ["alg1"])
# Finally, return only the fallback key from the appservice.
self.appservice_api.claim_client_keys.return_value = (
{local_user: {device_id_1: as_fallback_key}},
[],
)
# Claim OTKs, which will return only the fallback key from the database.
claim_res = self.get_success(
self.handler.claim_one_time_keys(
{local_user: {device_id_1: {"alg1": 1}}},
self.requester,
timeout=None,
always_include_fallback_keys=True,
)
)
self.assertEqual(
claim_res,
{
"failures": {},
"one_time_keys": {local_user: {device_id_1: as_fallback_key}},
},
)
@override_config({"experimental_features": {"msc3984_appservice_key_query": True}})
def test_query_local_devices_appservice(self) -> None:
"""Test that querying of appservices for keys overrides responses from the database."""
local_user = "@boris:" + self.hs.hostname
device_1 = "abc"
device_2 = "def"
device_3 = "ghi"
# There are 3 devices:
#
# 1. One which is uploaded to the homeserver.
# 2. One which is uploaded to the homeserver, but a newer copy is returned
# by the appservice.
# 3. One which is only returned by the appservice.
device_key_1: JsonDict = {
"user_id": local_user,
"device_id": device_1,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {
"ed25519:abc": "base64+ed25519+key",
"curve25519:abc": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:abc": "base64+signature"}},
}
device_key_2a: JsonDict = {
"user_id": local_user,
"device_id": device_2,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {
"ed25519:def": "base64+ed25519+key",
"curve25519:def": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:def": "base64+signature"}},
}
device_key_2b: JsonDict = {
"user_id": local_user,
"device_id": device_2,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
# The device ID is the same (above), but the keys are different.
"keys": {
"ed25519:xyz": "base64+ed25519+key",
"curve25519:xyz": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:xyz": "base64+signature"}},
}
device_key_3: JsonDict = {
"user_id": local_user,
"device_id": device_3,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
"keys": {
"ed25519:jkl": "base64+ed25519+key",
"curve25519:jkl": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:jkl": "base64+signature"}},
}
# Upload keys for devices 1 & 2a.
self.get_success(
self.handler.upload_keys_for_user(
local_user, device_1, {"device_keys": device_key_1}
)
)
self.get_success(
self.handler.upload_keys_for_user(
local_user, device_2, {"device_keys": device_key_2a}
)
)
# Inject an appservice interested in this user.
appservice = ApplicationService(
token="i_am_an_app_service",
id="1234",
namespaces={"users": [{"regex": r"@boris:.+", "exclusive": True}]},
# Note: this user does not have to match the regex above
sender="@as_main:test",
)
self.hs.get_datastores().main.services_cache = [appservice]
self.hs.get_datastores().main.exclusive_user_regex = _make_exclusive_regex(
[appservice]
)
# Setup a response.
self.appservice_api.query_keys.return_value = {
"device_keys": {
local_user: {device_2: device_key_2b, device_3: device_key_3}
}
}
# Request all devices.
res = self.get_success(self.handler.query_local_devices({local_user: None}))
self.assertIn(local_user, res)
for res_key in res[local_user].values():
res_key.pop("unsigned", None)
self.assertDictEqual(
res,
{
local_user: {
device_1: device_key_1,
device_2: device_key_2b,
device_3: device_key_3,
}
},
)
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