tree e99973e3516a014a22019b43cbd776ba622f413a
parent bf8b9c1a785591c6d4a0c1b2d12d33b6b0a00049
author Pirmin Vogel <vogelpi@lowrisc.org> 1634914867 +0200
committer Pirmin Vogel <vogelpi@lowrisc.org> 1635248923 +0200

[aes/rtl] Span permutation inside masking PRNG across all LFSRs

The AES masking PRNG uses multiple parallel LFSR chunks. Previously,
the same permuatation was applied to the output of all LFSRs. This
commit changes the implementation to use a single, but wider permutation
that is applied to the concatenated outputs of all LFSRs.

This is related to lowRISC/OpenTitan#1920.

Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>