On Fri, Jul 20, 2018 at 07:42:01PM +0200, Stephan Müller wrote:
> The cipher implementations of the kernel crypto API favor in-place
> cipher operations. Thus, switch the CTR cipher operation in the DRBG to
> perform in-place operations. This is implemented by using the output
> buffer as input
On Fri, Jul 27, 2018 at 01:49:08PM +0200, Stephan Mueller wrote:
>
> This is guaranteed by the invokers of drbg_kcapi_sym_ctr as there are two
> only:
>
> - the one in drbg_ctr_update uses the scratchpad for inbuf
>
> - the one in drbg_ctr_generate uses NULL which implies that the outscratchpad
Am Freitag, 27. Juli 2018, 12:53:35 CEST schrieb Herbert Xu:
Hi Herbert,
> On Fri, Jul 20, 2018 at 07:42:01PM +0200, Stephan Müller wrote:
> > @@ -1747,10 +1733,18 @@ static int drbg_kcapi_sym_ctr(struct drbg_state
> > *drbg,>
> > u8 *outbuf, u32 outlen)
> >
> > {
>
On Fri, Jul 20, 2018 at 07:42:01PM +0200, Stephan Müller wrote:
>
> @@ -1747,10 +1733,18 @@ static int drbg_kcapi_sym_ctr(struct drbg_state *drbg,
> u8 *outbuf, u32 outlen)
> {
> struct scatterlist *sg_in = >sg_in, *sg_out = >sg_out;
> + u32 scratchpad_use =
The cipher implementations of the kernel crypto API favor in-place
cipher operations. Thus, switch the CTR cipher operation in the DRBG to
perform in-place operations. This is implemented by using the output
buffer as input buffer and zeroizing it before the cipher operation to
implement a CTR
