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Date: Fri, 2 Feb 2018 17:58:32 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Herbert Xu <herbert@...dor.apana.org.au>
Subject: [PATCH 4.15 14/55] crypto: sha3-generic - fixes for alignment and big endian operation
4.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ard Biesheuvel <ard.biesheuvel@...aro.org>
commit c013cee99d5a18aec8c71fee8f5f41369cd12595 upstream.
Ensure that the input is byte swabbed before injecting it into the
SHA3 transform. Use the get_unaligned() accessor for this so that
we don't perform unaligned access inadvertently on architectures
that do not support that.
Fixes: 53964b9ee63b7075 ("crypto: sha3 - Add SHA-3 hash algorithm")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
crypto/sha3_generic.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/crypto/sha3_generic.c
+++ b/crypto/sha3_generic.c
@@ -18,6 +18,7 @@
#include <linux/types.h>
#include <crypto/sha3.h>
#include <asm/byteorder.h>
+#include <asm/unaligned.h>
#define KECCAK_ROUNDS 24
@@ -149,7 +150,7 @@ static int sha3_update(struct shash_desc
unsigned int i;
for (i = 0; i < sctx->rsizw; i++)
- sctx->st[i] ^= ((u64 *) src)[i];
+ sctx->st[i] ^= get_unaligned_le64(src + 8 * i);
keccakf(sctx->st);
done += sctx->rsiz;
@@ -174,7 +175,7 @@ static int sha3_final(struct shash_desc
sctx->buf[sctx->rsiz - 1] |= 0x80;
for (i = 0; i < sctx->rsizw; i++)
- sctx->st[i] ^= ((u64 *) sctx->buf)[i];
+ sctx->st[i] ^= get_unaligned_le64(sctx->buf + 8 * i);
keccakf(sctx->st);
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