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synapse/tests/handlers/test_e2e_keys.py

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# Copyright 2016 OpenMarket Ltd
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# 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.
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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
from synapse.api.errors import Codes, SynapseError
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from tests import unittest
class E2eKeysHandlerTestCase(unittest.HomeserverTestCase):
def make_homeserver(self, reactor, clock):
return self.setup_test_homeserver(federation_client=mock.Mock())
def prepare(self, reactor, clock, hs):
self.handler = hs.get_e2e_keys_handler()
self.store = self.hs.get_datastore()
def test_query_local_devices_no_devices(self):
"""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):
"""we should be able to re-upload the same keys"""
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
keys = {
"alg1:k1": "key1",
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"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):
"""attempts to change one-time-keys should be rejected"""
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
keys = {
"alg1:k1": "key1",
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"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):
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
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keys = {"alg1:k1": "key1"}
res = self.get_success(
self.handler.upload_keys_for_user(
local_user, device_id, {"one_time_keys": keys}
)
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)
self.assertDictEqual(
res, {"one_time_key_counts": {"alg1": 1, "signed_curve25519": 0}}
)
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res2 = self.get_success(
self.handler.claim_one_time_keys(
{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
)
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)
self.assertEqual(
res2,
{
"failures": {},
"one_time_keys": {local_user: {device_id: {"alg1:k1": "key1"}}},
},
)
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def test_fallback_key(self):
local_user = "@boris:" + self.hs.hostname
device_id = "xyz"
fallback_key = {"alg1:k1": "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, [])
self.get_success(
self.handler.upload_keys_for_user(
local_user,
device_id,
{"org.matrix.msc2732.fallback_keys": fallback_key},
)
)
# we should now have an unused alg1 key
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, ["alg1"])
# claiming an OTK when no OTKs are available should return the fallback
# key
res = self.get_success(
self.handler.claim_one_time_keys(
{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
)
)
self.assertEqual(
res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# we shouldn't have any unused fallback keys again
res = self.get_success(
self.store.get_e2e_unused_fallback_key_types(local_user, device_id)
)
self.assertEqual(res, [])
# claiming an OTK again should return the same fallback key
res = self.get_success(
self.handler.claim_one_time_keys(
{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
)
)
self.assertEqual(
res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
# 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}
)
)
res = self.get_success(
self.handler.claim_one_time_keys(
{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
)
)
self.assertEqual(
res,
{"failures": {}, "one_time_keys": {local_user: {device_id: otk}}},
)
res = self.get_success(
self.handler.claim_one_time_keys(
{"one_time_keys": {local_user: {device_id: "alg1"}}}, timeout=None
)
)
self.assertEqual(
res,
{"failures": {}, "one_time_keys": {local_user: {device_id: fallback_key}}},
)
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def test_replace_master_key(self):
"""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))
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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))
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devices = self.get_success(
self.handler.query_devices(
{"device_keys": {local_user: []}}, 0, local_user, "device123"
)
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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):
"""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))
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# upload two device keys, which will be signed later by the self-signing key
device_key_1 = {
"user_id": local_user,
"device_id": "abc",
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
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"keys": {
"ed25519:abc": "base64+ed25519+key",
"curve25519:abc": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:abc": "base64+signature"}},
}
device_key_2 = {
"user_id": local_user,
"device_id": "def",
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
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"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}
)
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)
self.get_success(
self.handler.upload_keys_for_user(
local_user, "def", {"device_keys": device_key_2}
)
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)
# 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}}
)
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)
# 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}}
)
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)
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"
)
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)
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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)
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def test_self_signing_key_doesnt_show_up_as_device(self):
"""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))
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e = self.get_failure(
self.hs.get_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)
res = self.get_success(self.handler.query_local_devices({local_user: None}))
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self.assertDictEqual(res, {local_user: {}})
def test_upload_signatures(self):
"""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 = {
"user_id": local_user,
"device_id": device_id,
"algorithms": [
"m.olm.curve25519-aes-sha2",
RoomEncryptionAlgorithms.MEGOLM_V1_AES_SHA2,
],
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"keys": {"curve25519:xyz": "curve25519+key", "ed25519:xyz": device_pubkey},
"signatures": {local_user: {"ed25519:xyz": "something"}},
}
device_signing_key = key.decode_signing_key_base64(
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"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 = {
"user_id": local_user,
"usage": ["master"],
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"keys": {"ed25519:" + master_pubkey: master_pubkey},
}
master_signing_key = key.decode_signing_key_base64(
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"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"],
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"keys": {"ed25519:" + usersigning_pubkey: usersigning_pubkey},
}
usersigning_signing_key = key.decode_signing_key_base64(
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"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"],
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"keys": {"ed25519:" + selfsigning_pubkey: selfsigning_pubkey},
}
selfsigning_signing_key = key.decode_signing_key_base64(
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"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"],
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"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}
)
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)
# 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"
}
},
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},
# 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"
}
},
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},
# 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"}
},
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},
},
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"
}
},
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},
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"
}
},
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},
},
},
)
)
user_failures = ret["failures"][local_user]
self.assertEqual(user_failures[device_id]["errcode"], Codes.INVALID_SIGNATURE)
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self.assertEqual(
user_failures[master_pubkey]["errcode"], Codes.INVALID_SIGNATURE
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)
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)
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self.assertEqual(
other_user_failures[other_master_pubkey]["errcode"], Codes.UNKNOWN
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)
# 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(
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ret["device_keys"][local_user]["xyz"]["signatures"][local_user][
"ed25519:" + selfsigning_pubkey
],
device_key["signatures"][local_user]["ed25519:" + selfsigning_pubkey],
)
self.assertEqual(
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ret["master_keys"][local_user]["signatures"][local_user][
"ed25519:" + device_id
],
master_key["signatures"][local_user]["ed25519:" + device_id],
)
self.assertEqual(
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ret["master_keys"][other_user]["signatures"][local_user][
"ed25519:" + usersigning_pubkey
],
other_master_key["signatures"][local_user]["ed25519:" + usersigning_pubkey],
)