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| author | Elena Petrova <lenaptr@google.com> | 2019-05-28 13:41:52 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-06-06 14:38:57 +0800 |
| commit | 1d4aaf16defa86d2665ae7db0259d6cb07e2091f (patch) | |
| tree | f092870ddd4812c5726954889f7dccab91faa194 /arch | |
| parent | 3b2614cb864d4114250f043ce6ff94e152198ae5 (diff) | |
| download | linux-1d4aaf16defa86d2665ae7db0259d6cb07e2091f.tar.bz2 | |
crypto: arm64/sha1-ce - correct digest for empty data in finup
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/crypto/sha1-ce-glue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/crypto/sha1-ce-glue.c b/arch/arm64/crypto/sha1-ce-glue.c index eaa7a8258f1c..0652f5f07ed1 100644 --- a/arch/arm64/crypto/sha1-ce-glue.c +++ b/arch/arm64/crypto/sha1-ce-glue.c @@ -55,7 +55,7 @@ static int sha1_ce_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out) { struct sha1_ce_state *sctx = shash_desc_ctx(desc); - bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE); + bool finalize = !sctx->sst.count && !(len % SHA1_BLOCK_SIZE) && len; if (!crypto_simd_usable()) return crypto_sha1_finup(desc, data, len, out); |