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-rw-r--r--crypto/sha256.c31
1 files changed, 10 insertions, 21 deletions
diff --git a/crypto/sha256.c b/crypto/sha256.c
index c78da50a9b7a..9d5ef674d6a9 100644
--- a/crypto/sha256.c
+++ b/crypto/sha256.c
@@ -20,6 +20,7 @@
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/crypto.h>
+#include <linux/types.h>
#include <asm/scatterlist.h>
#include <asm/byteorder.h>
@@ -279,22 +280,15 @@ static void sha256_update(void *ctx, const u8 *data, unsigned int len)
static void sha256_final(void* ctx, u8 *out)
{
struct sha256_ctx *sctx = ctx;
- u8 bits[8];
- unsigned int index, pad_len, t;
- int i, j;
+ __be32 *dst = (__be32 *)out;
+ __be32 bits[2];
+ unsigned int index, pad_len;
+ int i;
static const u8 padding[64] = { 0x80, };
/* Save number of bits */
- t = sctx->count[0];
- bits[7] = t; t >>= 8;
- bits[6] = t; t >>= 8;
- bits[5] = t; t >>= 8;
- bits[4] = t;
- t = sctx->count[1];
- bits[3] = t; t >>= 8;
- bits[2] = t; t >>= 8;
- bits[1] = t; t >>= 8;
- bits[0] = t;
+ bits[1] = cpu_to_be32(sctx->count[0]);
+ bits[0] = cpu_to_be32(sctx->count[1]);
/* Pad out to 56 mod 64. */
index = (sctx->count[0] >> 3) & 0x3f;
@@ -302,16 +296,11 @@ static void sha256_final(void* ctx, u8 *out)
sha256_update(sctx, padding, pad_len);
/* Append length (before padding) */
- sha256_update(sctx, bits, 8);
+ sha256_update(sctx, (const u8 *)bits, sizeof(bits));
/* Store state in digest */
- for (i = j = 0; i < 8; i++, j += 4) {
- t = sctx->state[i];
- out[j+3] = t; t >>= 8;
- out[j+2] = t; t >>= 8;
- out[j+1] = t; t >>= 8;
- out[j ] = t;
- }
+ for (i = 0; i < 8; i++)
+ dst[i] = cpu_to_be32(sctx->state[i]);
/* Zeroize sensitive information. */
memset(sctx, 0, sizeof(*sctx));