| commit | 3653c65fa582c2104d2bf7295e6637a37b96b432 | [log] [tgz] |
|---|---|---|
| author | Jade Philipoom <jadep@google.com> | Tue Nov 09 11:46:05 2021 +0000 |
| committer | Felix Miller <mail@felix-miller.de> | Thu Nov 11 11:08:35 2021 +0100 |
| tree | 71c52f3dd36c4ec6e94de709a772621ffc9df637 | |
| parent | 8630bcbbb59325eea9a52e364ac1dfdce7804758 [diff] |
[sw/crypto] Clarify bounds assumptions for Montgomery R^2. The Ibex implementation, on closer inspection, doesn't actually require R / 2 < M, so the comment is rephrased to not state that it does. The OTBN implementation is greatly simplified by the assumption that R / 2 < M, so it is modified to assume so and justify the assumption by citing FIPS. This commit also includes a minor adjustment to the R^2 loop, making it a loop instead of a loopi so as not to consume the loop stack unnecessarily. Signed-off-by: Jade Philipoom <jadep@google.com>
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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