Re: [PATCH v3 3/4] security: DH - remove dead code for zero padding
From: Stephan Mueller
Date: Thu Nov 18 2021 - 03:37:12 EST
Am Mittwoch, 17. November 2021, 22:28:46 CET schrieb Mat Martineau:
> On Mon, 15 Nov 2021, Stephan Müller wrote:
> > Remove the specific code that adds a zero padding that was intended
> > to be invoked when the DH operation result was smaller than the
> > modulus. However, this cannot occur any more these days because the
> > function mpi_write_to_sgl is used in the code path that calculates the
> > shared secret in dh_compute_value. This MPI service function guarantees
> > that leading zeros are introduced as needed to ensure the resulting data
> > is exactly as long as the modulus. This implies that the specific code
> > to add zero padding is dead code which can be safely removed.
> > Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx>
> > ---
> > security/keys/dh.c | 25 ++++---------------------
> > 1 file changed, 4 insertions(+), 21 deletions(-)
> Hi Stephan -
> Thanks for the cleanup!
Thank you for the review.
> Acked-by: Mat Martineau <mathew.j.martineau@xxxxxxxxxxxxxxx>
I have added your signature to the patch.