[CRYPTO] khazad: Use 32-bit reads on key

On 64-bit platform, reading 64-bit keys (which is supposed to be
32-bit aligned) at a time will result in unaligned access.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/khazad.c b/crypto/khazad.c
index 807f2bf..5b8dc9a 100644 (file)
--- a/crypto/khazad.c
+++ b/crypto/khazad.c
@@ -758,7 +758,7 @@ static int khazad_setkey(void *ctx_arg, const u8 *in_key,
                        unsigned int key_len, u32 *flags)
 {
        struct khazad_ctx *ctx = ctx_arg;
-       const __be64 *key = (const __be64 *)in_key;
+       const __be32 *key = (const __be32 *)in_key;
        int r;
        const u64 *S = T7;
        u64 K2, K1;
@@ -769,8 +769,9 @@ static int khazad_setkey(void *ctx_arg, const u8 *in_key,
                return -EINVAL;
        }
 
-       K2 = be64_to_cpu(key[0]);
-       K1 = be64_to_cpu(key[1]);
+       /* key is supposed to be 32-bit aligned */
+       K2 = ((u64)be32_to_cpu(key[0]) << 32) | be32_to_cpu(key[1]);
+       K1 = ((u64)be32_to_cpu(key[2]) << 32) | be32_to_cpu(key[3]);
 
        /* setup the encrypt key */
        for (r = 0; r <= KHAZAD_ROUNDS; r++) {