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cryptodev: Permit explicit IV/nonce and MAC/tag lengths.
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Authored by jhb on Sep 24 2021, 6:04 PM.

Details

Summary

Add 'ivlen' and 'maclen' fields to the structure used for CIOGSESSION2
to specify the explicit IV/nonce and MAC/tag lengths for crypto
sessions. If these fields are zero, the default lengths are used.

This permits selecting an alternate nonce length for AEAD ciphers such
as AES-CCM which support multiple nonce leengths. It also supports
truncated MACs as input to AEAD or ETA requests.

Sponsored by: The FreeBSD Foundation

Diff Detail

Repository
R10 FreeBSD src repository
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.

Event Timeline

sys/opencrypto/cryptodev.c
597

Why is this assignment needed? It is done again below.

jhb marked an inline comment as done.Oct 1 2021, 8:59 PM
jhb added inline comments.
sys/opencrypto/cryptodev.c
597

Oops, an earlier leftover from my first cut at doing this.

jhb marked an inline comment as done.
  • Drop an unnecessary line.
This revision is now accepted and ready to land.Oct 1 2021, 9:42 PM