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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2018-01-19 12:04:33 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2018-01-26 01:10:32 +1100
commitc013cee99d5a18aec8c71fee8f5f41369cd12595 (patch)
tree3a8ba8b3d6e8d687935633a1b80e3dd6578826b2 /crypto/sha3_generic.c
parent9c674e1e2f9e24fa4392167efe343749008338e0 (diff)
downloadlwn-c013cee99d5a18aec8c71fee8f5f41369cd12595.tar.gz
lwn-c013cee99d5a18aec8c71fee8f5f41369cd12595.zip
crypto: sha3-generic - fixes for alignment and big endian operation
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. Cc: <stable@vger.kernel.org> Fixes: 53964b9ee63b7075 ("crypto: sha3 - Add SHA-3 hash algorithm") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/sha3_generic.c')
-rw-r--r--crypto/sha3_generic.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/crypto/sha3_generic.c b/crypto/sha3_generic.c
index 7e8ed96236ce..a68be626017c 100644
--- 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 *desc, const u8 *data,
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 *desc, u8 *out)
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);