On Mon, Apr 16, 2018 at 10:07 AM, Horia Geantă <horia.geanta@xxxxxxx> wrote:
> Sometimes the provided RSA input buffer provided is not stripped
> of leading zeros. This could cause its size to be bigger than that
> of the modulus, making the HW complain:
>
> caam_jr 2142000.jr1: 40000789: DECO: desc idx 7:
> Protocol Size Error - A protocol has seen an error in size. When
> running RSA, pdb size N < (size of F) when no formatting is used; or
> pdb size N < (F + 11) when formatting is used.
>
> Fix the problem by stripping off the leading zero from input data
> before feeding it to the CAAM accelerator.
>
> Fixes: 8c419778ab57e ("crypto: caam - add support for RSA algorithm")
> Cc: <stable@xxxxxxxxxxxxxxx> # 4.8+
> Reported-by: Martin Townsend <mtownsend1973@xxxxxxxxx>
> Link: https://lkml.kernel.org/r/CABatt_ytYORYKtApcB4izhNanEKkGFi9XAQMjHi_n-8YWoCRiw@xxxxxxxxxxxxxx
> Signed-off-by: Horia Geantă <horia.geanta@xxxxxxx>
Tested-by: Fabio Estevam <fabio.estevam@xxxxxxx>
