mirrors/synapse
1
0
Fork 0
mirror of https://github.com/element-hq/synapse.git synced 2024-11-27 12:08:32 +03:00
Code Issues Projects Releases Packages Wiki Activity

Fix 500 when joining matrix-dev

Browse source 
matrix-dev has an event (`$/6ANj/9QWQyd71N6DpRQPf+SDUu11+HVMeKSpMzBCwM:zemos.net`)
which has no `hashes` member.

Check for missing `hashes` element in events.
This commit is contained in:
Richard van der Hoff 2017-11-28 14:06:12 +00:00
parent 5a4da5bf78
commit 7303ed65e1
1 changed files with 10 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
synapse/crypto/event_signing.py
View file

@ -32,15 +32,22 @@ def check_event_content_hash(event, hash_algorithm=hashlib.sha256):
"""Check whether the hash for this PDU matches the contents"""
name, expected_hash = compute_content_hash(event, hash_algorithm)
logger.debug("Expecting hash: %s", encode_base64(expected_hash))
if name not in event.hashes:
# some malformed events lack a 'hashes'. Protect against it being missing
# or a weird type by basically treating it the same as an unhashed event.
hashes = event.get("hashes")
if not isinstance(hashes, dict):
raise SynapseError(400, "Malformed 'hashes'", Codes.UNAUTHORIZED)
if name not in hashes:
raise SynapseError(
400,
"Algorithm %s not in hashes %s" % (
name, list(event.hashes),
name, list(hashes),
),
Codes.UNAUTHORIZED,
)
message_hash_base64 = event.hashes[name]
message_hash_base64 = hashes[name]
try:
message_hash_bytes = decode_base64(message_hash_base64)
except Exception: