Steve Weis created SPARK-47318:
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Summary: AuthEngine key exchange needs additional KDF round
Key: SPARK-47318
URL: https://issues.apache.org/jira/browse/SPARK-47318
Project: Spark
Issue Type: Bug
Components: Security
Affects Versions: 4.0.0
Reporter: Steve Weis
AuthEngine implements a bespoke [key exchange protocol
|[https://github.com/apache/spark/tree/master/common/network-common/src/main/java/org/apache/spark/network/crypto]|https://github.com/apache/spark/tree/master/common/network-common/src/main/java/org/apache/spark/network/crypto].]
based on the NNpsk0 Noise pattern and using X25519.
The Spark code improperly uses the derived shared secret directly, which is a
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