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Fix MSC3983 support: Use the unstable /keys/claim federation endpoint if multiple keys are requested (#15755)

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Patrick Cloke 2023-06-13 12:07:55 -04:00 committed by GitHub
parent 99c850f798
commit df945e0d7c
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2 changed files with 5 additions and 1 deletions
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changelog.d/15755.misc Normal file
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@ -0,0 +1 @@
Fix requesting multiple keys at once over federation, related to [MSC3983](https://github.com/matrix-org/matrix-spec-proposals/pull/3983).

5
synapse/federation/federation_client.py
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@ -260,7 +260,9 @@ class FederationClient(FederationBase):
use_unstable = False
for user_id, one_time_keys in query.items():
for device_id, algorithms in one_time_keys.items():
if any(count > 1 for count in algorithms.values()):
# If more than one algorithm is requested, attempt to use the unstable
# endpoint.
if sum(algorithms.values()) > 1:
use_unstable = True
if algorithms:
# For the stable query, choose only the first algorithm.
@ -296,6 +298,7 @@ class FederationClient(FederationBase):
else:
logger.debug("Skipping unstable claim client keys API")
# TODO Potentially attempt multiple queries and combine the results?
return await self.transport_layer.claim_client_keys(
user, destination, content, timeout
)