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Merge pull request #4722 from matrix-org/erikj/correctly_handle_keyring_exceptions

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Handle errors when fetching remote server keys
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Erik Johnston 2019-02-25 15:53:02 +00:00 committed by GitHub
commit 16c7afa94c
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2 changed files with 52 additions and 21 deletions
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1
changelog.d/4722.misc Normal file
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@ -0,0 +1 @@
Don't log exceptions when failing to fetch remote server keys

72
synapse/crypto/keyring.py
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@ -17,6 +17,7 @@
import logging
from collections import namedtuple
from six import raise_from
from six.moves import urllib
from signedjson.key import (
@ -35,7 +36,12 @@ from unpaddedbase64 import decode_base64
from twisted.internet import defer
from synapse.api.errors import Codes, RequestSendFailed, SynapseError
from synapse.api.errors import (
Codes,
HttpResponseException,
RequestSendFailed,
SynapseError,
)
from synapse.util import logcontext, unwrapFirstError
from synapse.util.logcontext import (
LoggingContext,
@ -44,6 +50,7 @@ from synapse.util.logcontext import (
run_in_background,
)
from synapse.util.metrics import Measure
from synapse.util.retryutils import NotRetryingDestination
logger = logging.getLogger(__name__)
@ -367,13 +374,18 @@ class Keyring(object):
server_name_and_key_ids, perspective_name, perspective_keys
)
defer.returnValue(result)
except KeyLookupError as e:
logger.warning(
"Key lookup failed from %r: %s", perspective_name, e,
)
except Exception as e:
logger.exception(
"Unable to get key from %r: %s %s",
perspective_name,
type(e).__name__, str(e),
)
defer.returnValue({})
defer.returnValue({})
results = yield logcontext.make_deferred_yieldable(defer.gatherResults(
[
@ -421,21 +433,30 @@ class Keyring(object):
# TODO(mark): Set the minimum_valid_until_ts to that needed by
# the events being validated or the current time if validating
# an incoming request.
query_response = yield self.client.post_json(
destination=perspective_name,
path="/_matrix/key/v2/query",
data={
u"server_keys": {
server_name: {
key_id: {
u"minimum_valid_until_ts": 0
} for key_id in key_ids
try:
query_response = yield self.client.post_json(
destination=perspective_name,
path="/_matrix/key/v2/query",
data={
u"server_keys": {
server_name: {
key_id: {
u"minimum_valid_until_ts": 0
} for key_id in key_ids
}
for server_name, key_ids in server_names_and_key_ids
}
for server_name, key_ids in server_names_and_key_ids
}
},
long_retries=True,
)
},
long_retries=True,
)
except (NotRetryingDestination, RequestSendFailed) as e:
raise_from(
KeyLookupError("Failed to connect to remote server"), e,
)
except HttpResponseException as e:
raise_from(
KeyLookupError("Remote server returned an error"), e,
)
keys = {}
@ -502,11 +523,20 @@ class Keyring(object):
if requested_key_id in keys:
continue
response = yield self.client.get_json(
destination=server_name,
path="/_matrix/key/v2/server/" + urllib.parse.quote(requested_key_id),
ignore_backoff=True,
)
try:
response = yield self.client.get_json(
destination=server_name,
path="/_matrix/key/v2/server/" + urllib.parse.quote(requested_key_id),
ignore_backoff=True,
)
except (NotRetryingDestination, RequestSendFailed) as e:
raise_from(
KeyLookupError("Failed to connect to remote server"), e,
)
except HttpResponseException as e:
raise_from(
KeyLookupError("Remote server returned an error"), e,
)
if (u"signatures" not in response
or server_name not in response[u"signatures"]):