Steve Weis created SPARK-47172:
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Summary: Upgrade Transport block cipher mode to GCM
Key: SPARK-47172
URL: https://issues.apache.org/jira/browse/SPARK-47172
Project: Spark
Issue Type: Improvement
Components: Security
Affects Versions: 3.5.0, 3.4.2
Reporter: Steve Weis
The cipher transformation currently used for encrypting RPC calls is an
unauthenticated mode (AES/CTR/NoPadding). This needs to be upgraded to an
authenticated mode (AES/GCM/NoPadding) to prevent ciphertext from being
modified in transit.
The relevant line is here:
[https://github.com/apache/spark/blob/a939a7d0fd9c6b23c879cbee05275c6fbc939e38/common/network-common/src/main/java/org/apache/spark/network/util/TransportConf.java#L220]
GCM is relatively more computationally expensive than CTR and adds a 16-byte
block of authentication tag data to each payload.
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