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| author | Elena Petrova <lenaptr@google.com> | 2019-05-28 15:41:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-31 08:28:35 +0300 |
| commit | beae5e5c450718d5e1c1b625777764487d08d645 (patch) | |
| tree | 5eb8430380773e51f912823bedf78e38cba89ccc /arch/arm64/crypto | |
| parent | fb8ee4908c3910f0f0510b18eb8c9f7eb3f34a1f (diff) | |
| download | linux-beae5e5c450718d5e1c1b625777764487d08d645.tar.xz | |
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>
Diffstat (limited to 'arch/arm64/crypto')
| -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 efbeb3e0dcfb..70568e6db77b 100644 --- a/arch/arm64/crypto/sha1-ce-glue.c +++ b/arch/arm64/crypto/sha1-ce-glue.c @@ -54,7 +54,7 @@ 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 (!may_use_simd()) return crypto_sha1_finup(desc, data, len, out); |