| commit | 76bade19dc2c5a8e6164318b59e99f0633e92c7e | [log] [tgz] |
|---|---|---|
| author | Michael Schaffner <msf@opentitan.org> | Tue Dec 15 18:43:25 2020 -0800 |
| committer | Michael Schaffner <msf@google.com> | Wed Dec 16 11:09:19 2020 -0800 |
| tree | 30c5f8858b4483361cbf341c41b76be0438da7a8 | |
| parent | 7a9361841a867185e092065acc303ebbe85dc229 [diff] |
[otp_ctrl] Statically precompute hashed tokens from netlist constants The all-zero token and the RAW unlock token are both netlist constants for which we have to precompute the hashed token values such that they can be used for the token comparisons inside the life cycle controller. We rely on constant propagation to statically precompute these values using the prim_prince cipher primitive. This precomputation is done within the OTP controller since only here we have full access to the random netlist constants used for the digest function. Signed-off-by: Michael Schaffner <msf@opentitan.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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