tree 2c102244c685f55094c5621c90706847b3c7d717
parent 91e9700bfc9efd188b2373c6cb86f616cea8da47
author Pirmin Vogel <vogelpi@lowrisc.org> 1607436974 +0100
committer Pirmin Vogel <vogelpi@lowrisc.org> 1608200402 +0100

[aes] Add support for multi-cycle S-Box implementations

This commit lays the ground work for multi-cycle S-Boxes required for SCA
hardening.

This is achieved by adding input enable signals as well as output req/ack
handshake signals between the cipher core controller and the SubBytes
and KeyExpand blocks (both contain several S-Boxes). For the currently
implemented single-cycle S-Boxes nothing changes, the newly added signals
have static values in this case.

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