Elena Petrova beae5e5c45 crypto: arm64/sha1-ce - correct digest for empty data in finup
commit 1d4aaf16defa86d2665ae7db0259d6cb07e2091f upstream.

The sha1-ce finup implementation for ARM64 produces wrong digest
for empty input (len=0). Expected: da39a3ee..., result: 67452301...
(initial value of SHA internal state). The error is in sha1_ce_finup:
for empty data `finalize` will be 1, so the code is relying on
sha1_ce_transform to make the final round. However, in
sha1_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: 07eb54d306f4 ("crypto: arm64/sha1-ce - move SHA-1 ARMv8 implementation to base layer")
Cc: stable@vger.kernel.org
Signed-off-by: Elena Petrova <lenaptr@google.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-07-31 07:28:35 +02:00
..
2019-02-20 10:20:53 +01:00
2018-02-28 10:19:44 +01:00
2019-03-23 14:35:21 +01:00
2019-07-31 07:28:18 +02:00
2019-07-21 09:04:41 +02:00