On Tue, May 28, 2019 at 03:35:06PM +0100, Elena Petrova wrote:
> The sha256-ce finup implementation for ARM64 produces wrong digest
> for empty input (len=0). Expected: the actual digest, result: initial
> value of SHA internal state. The error is in sha256_ce_finup:
> for empty data `finalize` will be 1, so the code is relying on
> sha2_ce_transform to make the final round. However, in
> sha256_base_do_update, the block function will not be called when
> len == 0.
>
> Fix it by setting finalize to 0 if data is empty.
>
> Fixes: 03802f6a80b3a ("crypto: arm64/sha2-ce - move SHA-224/256 ARMv8
> implementation to base layer")
> Cc: sta...@vger.kernel.org
> Signed-off-by: Elena Petrova <lena...@google.com>
> Reviewed-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
> ---
> arch/arm64/crypto/sha2-ce-glue.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Patch applied. Thanks.
--
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