[CRYPTO] Use standard byte order macros wherever possible

A lot of crypto code needs to read/write a 32-bit/64-bit words in a
specific gender.  Many of them open code them by reading/writing one
byte at a time.  This patch converts all the applicable usages over
to use the standard byte order macros.

This is based on a previous patch by Denis Vlasenko.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 13 insertions, 25 deletions

diff --git a/crypto/anubis.c b/crypto/anubis.c
index 3925eb0133cb..94c4b1f3e3a7 100644
--- a/crypto/anubis.c
+++ b/crypto/anubis.c
@@ -32,8 +32,10 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/mm.h>
+#include <asm/byteorder.h>
 #include <asm/scatterlist.h>
 #include <linux/crypto.h>
+#include <linux/types.h>
 
 #define ANUBIS_MIN_KEY_SIZE     16
 #define ANUBIS_MAX_KEY_SIZE     40
@@ -461,8 +463,8 @@ static const u32 rc[] = {
 static int anubis_setkey(void *ctx_arg, const u8 *in_key,
                          unsigned int key_len, u32 *flags)
 {
-
-        int N, R, i, pos, r;
+        const __be32 *key = (const __be32 *)in_key;
+        int N, R, i, r;
         u32 kappa[ANUBIS_MAX_N];
         u32 inter[ANUBIS_MAX_N];
 
@@ -483,13 +485,8 @@ static int anubis_setkey(void *ctx_arg, const u8 *in_key,
         ctx->R = R = 8 + N;
 
         /* * map cipher key to initial key state (mu): */
-                for (i = 0, pos = 0; i < N; i++, pos += 4) {
-                kappa[i] =
-                        (in_key[pos    ] << 24) ^
-                        (in_key[pos + 1] << 16) ^
-                        (in_key[pos + 2] <<  8) ^
-                        (in_key[pos + 3]      );
-        }
+        for (i = 0; i < N; i++)
+                kappa[i] = be32_to_cpu(key[i]);
 
         /*
          * generate R + 1 round keys:
@@ -578,7 +575,9 @@ static int anubis_setkey(void *ctx_arg, const u8 *in_key,
 static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4],
                 u8 *ciphertext, const u8 *plaintext, const int R)
 {
-        int i, pos, r;
+        const __be32 *src = (const __be32 *)plaintext;
+        __be32 *dst = (__be32 *)ciphertext;
+        int i, r;
         u32 state[4];
         u32 inter[4];
 
@@ -586,14 +585,8 @@ static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4],
          * map plaintext block to cipher state (mu)
          * and add initial round key (sigma[K^0]):
          */
-        for (i = 0, pos = 0; i < 4; i++, pos += 4) {
-                state[i] =
-                        (plaintext[pos    ] << 24) ^
-                        (plaintext[pos + 1] << 16) ^
-                        (plaintext[pos + 2] <<  8) ^
-                        (plaintext[pos + 3]      ) ^
-                        roundKey[0][i];
-        }
+        for (i = 0; i < 4; i++)
+                state[i] = be32_to_cpu(src[i]) ^ roundKey[0][i];
 
         /*
          * R - 1 full rounds:
@@ -663,13 +656,8 @@ static void anubis_crypt(u32 roundKey[ANUBIS_MAX_ROUNDS + 1][4],
          * map cipher state to ciphertext block (mu^{-1}):
          */
 
-        for (i = 0, pos = 0; i < 4; i++, pos += 4) {
-                u32 w = inter[i];
-                ciphertext[pos    ] = (u8)(w >> 24);
-                ciphertext[pos + 1] = (u8)(w >> 16);
-                ciphertext[pos + 2] = (u8)(w >>  8);
-                ciphertext[pos + 3] = (u8)(w      );
-        }
+        for (i = 0; i < 4; i++)
+                dst[i] = cpu_to_be32(inter[i]);
 }
 
 static void anubis_encrypt(void *ctx_arg, u8 *dst, const u8 *src)