| commit | f319633d233e1ff25e26ed370af8188166f3550b | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Thu Dec 17 11:24:29 2020 +0100 |
| committer | Pirmin Vogel <vogelpi@lowrisc.org> | Tue Feb 02 18:31:24 2021 +0100 |
| tree | b1e6ba4d7e20e33c4d0520ed777d4099979e79e7 | |
| parent | 20eb9c78eb4b58820fd38ece3796dd213b2d32d2 [diff] |
[aes] Prepare distribution of PRD for domain-oriented masking (DOM) Unlike for the masked Canright S-Boxes, the output masks for SubBytes are not known beforehand when using DOM. Instead, the output masks are generated from the PRD input inside the individual S-Boxes. In order to simplify the integration of different masking schemes, this commit thus aligns how the masking PRD is distributed when using the masked Canright S-Boxes. We no longer separate the masking PRNG output into output masks and PRD for SubBytes at the cipher core level but feed the full per-S-Box PRNG output into each S-Box. The "generation" of the output mask is performed inside the S-Box and the output mask becomes an output port also for the masked Canright S-Boxes. Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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