Merge pull request #5726 from matrix-org/uhoreg/e2e_cross-signing2-part2

Cross-signing [3/4] -- uploading signatures edition
This commit is contained in:
Hubert Chathi 2019-10-22 17:05:06 +01:00 committed by GitHub
commit 2761731634
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 774 additions and 14 deletions

1
changelog.d/5726.feature Normal file
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@ -0,0 +1 @@
Add ability to upload cross-signing signatures.

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@ -19,12 +19,15 @@ import logging
from six import iteritems from six import iteritems
import attr
from canonicaljson import encode_canonical_json, json from canonicaljson import encode_canonical_json, json
from signedjson.key import decode_verify_key_bytes
from signedjson.sign import SignatureVerifyException, verify_signed_json from signedjson.sign import SignatureVerifyException, verify_signed_json
from unpaddedbase64 import decode_base64
from twisted.internet import defer from twisted.internet import defer
from synapse.api.errors import CodeMessageException, Codes, SynapseError from synapse.api.errors import CodeMessageException, Codes, NotFoundError, SynapseError
from synapse.logging.context import make_deferred_yieldable, run_in_background from synapse.logging.context import make_deferred_yieldable, run_in_background
from synapse.logging.opentracing import log_kv, set_tag, tag_args, trace from synapse.logging.opentracing import log_kv, set_tag, tag_args, trace
from synapse.types import ( from synapse.types import (
@ -602,6 +605,339 @@ class E2eKeysHandler(object):
return {} return {}
@defer.inlineCallbacks
def upload_signatures_for_device_keys(self, user_id, signatures):
"""Upload device signatures for cross-signing
Args:
user_id (string): the user uploading the signatures
signatures (dict[string, dict[string, dict]]): map of users to
devices to signed keys. This is the submission from the user; an
exception will be raised if it is malformed.
Returns:
dict: response to be sent back to the client. The response will have
a "failures" key, which will be a dict mapping users to devices
to errors for the signatures that failed.
Raises:
SynapseError: if the signatures dict is not valid.
"""
failures = {}
# signatures to be stored. Each item will be a SignatureListItem
signature_list = []
# split between checking signatures for own user and signatures for
# other users, since we verify them with different keys
self_signatures = signatures.get(user_id, {})
other_signatures = {k: v for k, v in signatures.items() if k != user_id}
self_signature_list, self_failures = yield self._process_self_signatures(
user_id, self_signatures
)
signature_list.extend(self_signature_list)
failures.update(self_failures)
other_signature_list, other_failures = yield self._process_other_signatures(
user_id, other_signatures
)
signature_list.extend(other_signature_list)
failures.update(other_failures)
# store the signature, and send the appropriate notifications for sync
logger.debug("upload signature failures: %r", failures)
yield self.store.store_e2e_cross_signing_signatures(user_id, signature_list)
self_device_ids = [item.target_device_id for item in self_signature_list]
if self_device_ids:
yield self.device_handler.notify_device_update(user_id, self_device_ids)
signed_users = [item.target_user_id for item in other_signature_list]
if signed_users:
yield self.device_handler.notify_user_signature_update(
user_id, signed_users
)
return {"failures": failures}
@defer.inlineCallbacks
def _process_self_signatures(self, user_id, signatures):
"""Process uploaded signatures of the user's own keys.
Signatures of the user's own keys from this API come in two forms:
- signatures of the user's devices by the user's self-signing key,
- signatures of the user's master key by the user's devices.
Args:
user_id (string): the user uploading the keys
signatures (dict[string, dict]): map of devices to signed keys
Returns:
(list[SignatureListItem], dict[string, dict[string, dict]]):
a list of signatures to store, and a map of users to devices to failure
reasons
Raises:
SynapseError: if the input is malformed
"""
signature_list = []
failures = {}
if not signatures:
return signature_list, failures
if not isinstance(signatures, dict):
raise SynapseError(400, "Invalid parameter", Codes.INVALID_PARAM)
try:
# get our self-signing key to verify the signatures
_, self_signing_key_id, self_signing_verify_key = yield self._get_e2e_cross_signing_verify_key(
user_id, "self_signing"
)
# get our master key, since we may have received a signature of it.
# We need to fetch it here so that we know what its key ID is, so
# that we can check if a signature that was sent is a signature of
# the master key or of a device
master_key, _, master_verify_key = yield self._get_e2e_cross_signing_verify_key(
user_id, "master"
)
# fetch our stored devices. This is used to 1. verify
# signatures on the master key, and 2. to compare with what
# was sent if the device was signed
devices = yield self.store.get_e2e_device_keys([(user_id, None)])
if user_id not in devices:
raise NotFoundError("No device keys found")
devices = devices[user_id]
except SynapseError as e:
failure = _exception_to_failure(e)
failures[user_id] = {device: failure for device in signatures.keys()}
return signature_list, failures
for device_id, device in signatures.items():
# make sure submitted data is in the right form
if not isinstance(device, dict):
raise SynapseError(400, "Invalid parameter", Codes.INVALID_PARAM)
try:
if "signatures" not in device or user_id not in device["signatures"]:
# no signature was sent
raise SynapseError(
400, "Invalid signature", Codes.INVALID_SIGNATURE
)
if device_id == master_verify_key.version:
# The signature is of the master key. This needs to be
# handled differently from signatures of normal devices.
master_key_signature_list = self._check_master_key_signature(
user_id, device_id, device, master_key, devices
)
signature_list.extend(master_key_signature_list)
continue
# at this point, we have a device that should be signed
# by the self-signing key
if self_signing_key_id not in device["signatures"][user_id]:
# no signature was sent
raise SynapseError(
400, "Invalid signature", Codes.INVALID_SIGNATURE
)
try:
stored_device = devices[device_id]
except KeyError:
raise NotFoundError("Unknown device")
if self_signing_key_id in stored_device.get("signatures", {}).get(
user_id, {}
):
# we already have a signature on this device, so we
# can skip it, since it should be exactly the same
continue
_check_device_signature(
user_id, self_signing_verify_key, device, stored_device
)
signature = device["signatures"][user_id][self_signing_key_id]
signature_list.append(
SignatureListItem(
self_signing_key_id, user_id, device_id, signature
)
)
except SynapseError as e:
failures.setdefault(user_id, {})[device_id] = _exception_to_failure(e)
return signature_list, failures
def _check_master_key_signature(
self, user_id, master_key_id, signed_master_key, stored_master_key, devices
):
"""Check signatures of a user's master key made by their devices.
Args:
user_id (string): the user whose master key is being checked
master_key_id (string): the ID of the user's master key
signed_master_key (dict): the user's signed master key that was uploaded
stored_master_key (dict): our previously-stored copy of the user's master key
devices (iterable(dict)): the user's devices
Returns:
list[SignatureListItem]: a list of signatures to store
Raises:
SynapseError: if a signature is invalid
"""
# for each device that signed the master key, check the signature.
master_key_signature_list = []
sigs = signed_master_key["signatures"]
for signing_key_id, signature in sigs[user_id].items():
_, signing_device_id = signing_key_id.split(":", 1)
if (
signing_device_id not in devices
or signing_key_id not in devices[signing_device_id]["keys"]
):
# signed by an unknown device, or the
# device does not have the key
raise SynapseError(400, "Invalid signature", Codes.INVALID_SIGNATURE)
# get the key and check the signature
pubkey = devices[signing_device_id]["keys"][signing_key_id]
verify_key = decode_verify_key_bytes(signing_key_id, decode_base64(pubkey))
_check_device_signature(
user_id, verify_key, signed_master_key, stored_master_key
)
master_key_signature_list.append(
SignatureListItem(signing_key_id, user_id, master_key_id, signature)
)
return master_key_signature_list
@defer.inlineCallbacks
def _process_other_signatures(self, user_id, signatures):
"""Process uploaded signatures of other users' keys. These will be the
target user's master keys, signed by the uploading user's user-signing
key.
Args:
user_id (string): the user uploading the keys
signatures (dict[string, dict]): map of users to devices to signed keys
Returns:
(list[SignatureListItem], dict[string, dict[string, dict]]):
a list of signatures to store, and a map of users to devices to failure
reasons
Raises:
SynapseError: if the input is malformed
"""
signature_list = []
failures = {}
if not signatures:
return signature_list, failures
try:
# get our user-signing key to verify the signatures
user_signing_key, user_signing_key_id, user_signing_verify_key = yield self._get_e2e_cross_signing_verify_key(
user_id, "user_signing"
)
except SynapseError as e:
failure = _exception_to_failure(e)
for user, devicemap in signatures.items():
failures[user] = {device_id: failure for device_id in devicemap.keys()}
return signature_list, failures
for target_user, devicemap in signatures.items():
# make sure submitted data is in the right form
if not isinstance(devicemap, dict):
raise SynapseError(400, "Invalid parameter", Codes.INVALID_PARAM)
for device in devicemap.values():
if not isinstance(device, dict):
raise SynapseError(400, "Invalid parameter", Codes.INVALID_PARAM)
device_id = None
try:
# get the target user's master key, to make sure it matches
# what was sent
master_key, master_key_id, _ = yield self._get_e2e_cross_signing_verify_key(
target_user, "master", user_id
)
# make sure that the target user's master key is the one that
# was signed (and no others)
device_id = master_key_id.split(":", 1)[1]
if device_id not in devicemap:
logger.debug(
"upload signature: could not find signature for device %s",
device_id,
)
# set device to None so that the failure gets
# marked on all the signatures
device_id = None
raise NotFoundError("Unknown device")
key = devicemap[device_id]
other_devices = [k for k in devicemap.keys() if k != device_id]
if other_devices:
# other devices were signed -- mark those as failures
logger.debug("upload signature: too many devices specified")
failure = _exception_to_failure(NotFoundError("Unknown device"))
failures[target_user] = {
device: failure for device in other_devices
}
if user_signing_key_id in master_key.get("signatures", {}).get(
user_id, {}
):
# we already have the signature, so we can skip it
continue
_check_device_signature(
user_id, user_signing_verify_key, key, master_key
)
signature = key["signatures"][user_id][user_signing_key_id]
signature_list.append(
SignatureListItem(
user_signing_key_id, target_user, device_id, signature
)
)
except SynapseError as e:
failure = _exception_to_failure(e)
if device_id is None:
failures[target_user] = {
device_id: failure for device_id in devicemap.keys()
}
else:
failures.setdefault(target_user, {})[device_id] = failure
return signature_list, failures
@defer.inlineCallbacks
def _get_e2e_cross_signing_verify_key(self, user_id, key_type, from_user_id=None):
"""Fetch the cross-signing public key from storage and interpret it.
Args:
user_id (str): the user whose key should be fetched
key_type (str): the type of key to fetch
from_user_id (str): the user that we are fetching the keys for.
This affects what signatures are fetched.
Returns:
dict, str, VerifyKey: the raw key data, the key ID, and the
signedjson verify key
Raises:
NotFoundError: if the key is not found
"""
key = yield self.store.get_e2e_cross_signing_key(
user_id, key_type, from_user_id
)
if key is None:
logger.debug("no %s key found for %s", key_type, user_id)
raise NotFoundError("No %s key found for %s" % (key_type, user_id))
key_id, verify_key = get_verify_key_from_cross_signing_key(key)
return key, key_id, verify_key
def _check_cross_signing_key(key, user_id, key_type, signing_key=None): def _check_cross_signing_key(key, user_id, key_type, signing_key=None):
"""Check a cross-signing key uploaded by a user. Performs some basic sanity """Check a cross-signing key uploaded by a user. Performs some basic sanity
@ -630,7 +966,49 @@ def _check_cross_signing_key(key, user_id, key_type, signing_key=None):
) )
def _check_device_signature(user_id, verify_key, signed_device, stored_device):
"""Check that a signature on a device or cross-signing key is correct and
matches the copy of the device/key that we have stored. Throws an
exception if an error is detected.
Args:
user_id (str): the user ID whose signature is being checked
verify_key (VerifyKey): the key to verify the device with
signed_device (dict): the uploaded signed device data
stored_device (dict): our previously stored copy of the device
Raises:
SynapseError: if the signature was invalid or the sent device is not the
same as the stored device
"""
# make sure that the device submitted matches what we have stored
stripped_signed_device = {
k: v for k, v in signed_device.items() if k not in ["signatures", "unsigned"]
}
stripped_stored_device = {
k: v for k, v in stored_device.items() if k not in ["signatures", "unsigned"]
}
if stripped_signed_device != stripped_stored_device:
logger.debug(
"upload signatures: key does not match %s vs %s",
signed_device,
stored_device,
)
raise SynapseError(400, "Key does not match")
try:
verify_signed_json(signed_device, user_id, verify_key)
except SignatureVerifyException:
logger.debug("invalid signature on key")
raise SynapseError(400, "Invalid signature", Codes.INVALID_SIGNATURE)
def _exception_to_failure(e): def _exception_to_failure(e):
if isinstance(e, SynapseError):
return {"status": e.code, "errcode": e.errcode, "message": str(e)}
if isinstance(e, CodeMessageException): if isinstance(e, CodeMessageException):
return {"status": e.code, "message": str(e)} return {"status": e.code, "message": str(e)}
@ -658,3 +1036,14 @@ def _one_time_keys_match(old_key_json, new_key):
new_key_copy.pop("signatures", None) new_key_copy.pop("signatures", None)
return old_key == new_key_copy return old_key == new_key_copy
@attr.s
class SignatureListItem:
"""An item in the signature list as used by upload_signatures_for_device_keys.
"""
signing_key_id = attr.ib()
target_user_id = attr.ib()
target_device_id = attr.ib()
signature = attr.ib()

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@ -274,7 +274,57 @@ class SigningKeyUploadServlet(RestServlet):
) )
result = yield self.e2e_keys_handler.upload_signing_keys_for_user(user_id, body) result = yield self.e2e_keys_handler.upload_signing_keys_for_user(user_id, body)
return (200, result) return 200, result
class SignaturesUploadServlet(RestServlet):
"""
POST /keys/signatures/upload HTTP/1.1
Content-Type: application/json
{
"@alice:example.com": {
"<device_id>": {
"user_id": "<user_id>",
"device_id": "<device_id>",
"algorithms": [
"m.olm.curve25519-aes-sha256",
"m.megolm.v1.aes-sha"
],
"keys": {
"<algorithm>:<device_id>": "<key_base64>",
},
"signatures": {
"<signing_user_id>": {
"<algorithm>:<signing_key_base64>": "<signature_base64>>"
}
}
}
}
}
"""
PATTERNS = client_patterns("/keys/signatures/upload$")
def __init__(self, hs):
"""
Args:
hs (synapse.server.HomeServer): server
"""
super(SignaturesUploadServlet, self).__init__()
self.auth = hs.get_auth()
self.e2e_keys_handler = hs.get_e2e_keys_handler()
@defer.inlineCallbacks
def on_POST(self, request):
requester = yield self.auth.get_user_by_req(request, allow_guest=True)
user_id = requester.user.to_string()
body = parse_json_object_from_request(request)
result = yield self.e2e_keys_handler.upload_signatures_for_device_keys(
user_id, body
)
return 200, result
def register_servlets(hs, http_server): def register_servlets(hs, http_server):
@ -283,3 +333,4 @@ def register_servlets(hs, http_server):
KeyChangesServlet(hs).register(http_server) KeyChangesServlet(hs).register(http_server)
OneTimeKeyServlet(hs).register(http_server) OneTimeKeyServlet(hs).register(http_server)
SigningKeyUploadServlet(hs).register(http_server) SigningKeyUploadServlet(hs).register(http_server)
SignaturesUploadServlet(hs).register(http_server)

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@ -68,6 +68,11 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
display_name = device_info["device_display_name"] display_name = device_info["device_display_name"]
if display_name is not None: if display_name is not None:
r["unsigned"]["device_display_name"] = display_name r["unsigned"]["device_display_name"] = display_name
if "signatures" in device_info:
for sig_user_id, sigs in device_info["signatures"].items():
r.setdefault("signatures", {}).setdefault(
sig_user_id, {}
).update(sigs)
rv[user_id][device_id] = r rv[user_id][device_id] = r
return rv return rv
@ -81,6 +86,8 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
query_clauses = [] query_clauses = []
query_params = [] query_params = []
signature_query_clauses = []
signature_query_params = []
if include_all_devices is False: if include_all_devices is False:
include_deleted_devices = False include_deleted_devices = False
@ -91,12 +98,20 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
for (user_id, device_id) in query_list: for (user_id, device_id) in query_list:
query_clause = "user_id = ?" query_clause = "user_id = ?"
query_params.append(user_id) query_params.append(user_id)
signature_query_clause = "target_user_id = ?"
signature_query_params.append(user_id)
if device_id is not None: if device_id is not None:
query_clause += " AND device_id = ?" query_clause += " AND device_id = ?"
query_params.append(device_id) query_params.append(device_id)
signature_query_clause += " AND target_device_id = ?"
signature_query_params.append(device_id)
signature_query_clause += " AND user_id = ?"
signature_query_params.append(user_id)
query_clauses.append(query_clause) query_clauses.append(query_clause)
signature_query_clauses.append(signature_query_clause)
sql = ( sql = (
"SELECT user_id, device_id, " "SELECT user_id, device_id, "
@ -123,6 +138,22 @@ class EndToEndKeyWorkerStore(SQLBaseStore):
for user_id, device_id in deleted_devices: for user_id, device_id in deleted_devices:
result.setdefault(user_id, {})[device_id] = None result.setdefault(user_id, {})[device_id] = None
# get signatures on the device
signature_sql = (
"SELECT * " " FROM e2e_cross_signing_signatures " " WHERE %s"
) % (" OR ".join("(" + q + ")" for q in signature_query_clauses))
txn.execute(signature_sql, signature_query_params)
rows = self.cursor_to_dict(txn)
for row in rows:
target_user_id = row["target_user_id"]
target_device_id = row["target_device_id"]
if target_user_id in result and target_device_id in result[target_user_id]:
result[target_user_id][target_device_id].setdefault(
"signatures", {}
).setdefault(row["user_id"], {})[row["key_id"]] = row["signature"]
log_kv(result) log_kv(result)
return result return result
@ -468,24 +499,19 @@ class EndToEndKeyStore(EndToEndKeyWorkerStore, SQLBaseStore):
Args: Args:
user_id (str): the user who made the signatures user_id (str): the user who made the signatures
signatures (iterable[(str, str, str, str)]): signatures to add - each signatures (iterable[SignatureListItem]): signatures to add
a tuple of (key_id, target_user_id, target_device_id, signature),
where key_id is the ID of the key (including the signature
algorithm) that made the signature, target_user_id and
target_device_id indicate the device being signed, and signature
is the signature of the device
""" """
return self._simple_insert_many( return self._simple_insert_many(
"e2e_cross_signing_signatures", "e2e_cross_signing_signatures",
[ [
{ {
"user_id": user_id, "user_id": user_id,
"key_id": key_id, "key_id": item.signing_key_id,
"target_user_id": target_user_id, "target_user_id": item.target_user_id,
"target_device_id": target_device_id, "target_device_id": item.target_device_id,
"signature": signature, "signature": item.signature,
} }
for (key_id, target_user_id, target_device_id, signature) in signatures for item in signatures
], ],
"add_e2e_signing_key", "add_e2e_signing_key",
) )

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@ -17,9 +17,11 @@
import mock import mock
import signedjson.key as key
import signedjson.sign as sign
from twisted.internet import defer from twisted.internet import defer
import synapse.api.errors
import synapse.handlers.e2e_keys import synapse.handlers.e2e_keys
import synapse.storage import synapse.storage
from synapse.api import errors from synapse.api import errors
@ -181,6 +183,96 @@ class E2eKeysHandlerTestCase(unittest.TestCase):
) )
self.assertDictEqual(devices["master_keys"], {local_user: keys2["master_key"]}) self.assertDictEqual(devices["master_keys"], {local_user: keys2["master_key"]})
@defer.inlineCallbacks
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",
)
yield 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 = {
"user_id": local_user,
"device_id": "abc",
"algorithms": ["m.olm.curve25519-aes-sha256", "m.megolm.v1.aes-sha"],
"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-sha256", "m.megolm.v1.aes-sha"],
"keys": {
"ed25519:def": "base64+ed25519+key",
"curve25519:def": "base64+curve25519+key",
},
"signatures": {local_user: {"ed25519:def": "base64+signature"}},
}
yield self.handler.upload_keys_for_user(
local_user, "abc", {"device_keys": device_key_1}
)
yield 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)
yield 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)
yield 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 = yield self.handler.query_devices(
{"device_keys": {local_user: []}}, 0, local_user
)
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)
@defer.inlineCallbacks @defer.inlineCallbacks
def test_self_signing_key_doesnt_show_up_as_device(self): def test_self_signing_key_doesnt_show_up_as_device(self):
"""signing keys should be hidden when fetching a user's devices""" """signing keys should be hidden when fetching a user's devices"""
@ -210,3 +302,204 @@ class E2eKeysHandlerTestCase(unittest.TestCase):
res = yield self.handler.query_local_devices({local_user: None}) res = yield self.handler.query_local_devices({local_user: None})
self.assertDictEqual(res, {local_user: {}}) self.assertDictEqual(res, {local_user: {}})
@defer.inlineCallbacks
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-sha256", "m.megolm.v1.aes-sha"],
"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"
)
yield 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"],
"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,
}
yield 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},
}
yield self.handler.upload_signing_keys_for_user(
other_user, {"master_key": other_master_key}
)
# test various signature failures (see below)
ret = yield 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-sha256",
"m.megolm.v1.aes-sha",
],
"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"], errors.Codes.INVALID_SIGNATURE
)
self.assertEqual(
user_failures[master_pubkey]["errcode"], errors.Codes.INVALID_SIGNATURE
)
self.assertEqual(user_failures["unknown"]["errcode"], errors.Codes.NOT_FOUND)
other_user_failures = ret["failures"][other_user]
self.assertEqual(
other_user_failures["unknown"]["errcode"], errors.Codes.NOT_FOUND
)
self.assertEqual(
other_user_failures[other_master_pubkey]["errcode"], errors.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 = yield 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 = yield self.handler.query_devices(
{"device_keys": {local_user: [], other_user: []}}, 0, local_user
)
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],
)