tree d17c24e3969dd285799ccc5cdda407efb062621c
parent 1e1b30380b31573839d3d9ce2c4eac3bd0179be6
author Timothy Trippel <ttrippel@google.com> 1677867864 -0800
committer Timothy Trippel <5633066+timothytrippel@users.noreply.github.com> 1678314399 -0800

[flash_ctrl] update `IPoly` parameter in flash scrambler

While working on #9322, I noticed the GF(2) irreducible polynomial used
for the flash scrambling scheme was not the Conway polynomial with
degree 64, but rather the Conway polynomial with degree 32.

After discussion in #17443, it was determined that while OK, as the
polynomial was still irreducible, a better, NIST recommended polynomial
should be used instead.

This updates the GF(2) irreducible polynomial used by the flash
scrambler to the NIST recommended polynomial for block ciphers:
`x^64 + x^4 + x^3 + x + 1`.

Signed-off-by: Timothy Trippel <ttrippel@google.com>