| commit | feb7b032d82d67fab24462f0c99e903d9e1ad48d | [log] [tgz] |
|---|---|---|
| author | Michael Schaffner <msf@google.com> | Fri Jun 04 16:46:50 2021 -0700 |
| committer | Michael Schaffner <msf@google.com> | Thu Jun 17 11:00:08 2021 -0700 |
| tree | f4aa0779ea23ff3895226cf2b3f859e0b3e5062a | |
| parent | 5d29dda5306b70f0eb702d7a297c56a052176a98 [diff] |
[alert_handler] Duplicate LFSR counter and update EDN reseeding logic This duplicates the timer counters inside the LFSR timer to harden this module against FI attacks. In case the LFSRs or counters do not agree, the ping fail alerts are continuously asserted. This also updates the entropy hookup to EDN - although this will have to be finalized when the reverse ping mechanism for escalation receivers is added (the reseeding needs to be properly synchronized with the timeout counters inside the escalation receivers since this could otherwise lead to spurious escalation action triggers). See also #2049 Signed-off-by: Michael Schaffner <msf@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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