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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2005-10-30 21:25:15 +1100 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-01-09 14:15:34 -0800 |
| commit | 06ace7a9bafeb9047352707eb79e8eaa0dfdf5f2 (patch) | |
| tree | fa22bbc2e8ea5bee00b6aec353783144b6f8735a /crypto/khazad.c | |
| parent | 2df15fffc612b53b2c8e4ff3c981a82441bc00ae (diff) | |
| download | linux-06ace7a9bafeb9047352707eb79e8eaa0dfdf5f2.tar.bz2 | |
[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>
Diffstat (limited to 'crypto/khazad.c')
| -rw-r--r-- | crypto/khazad.c | 45 |
1 files changed, 9 insertions, 36 deletions
diff --git a/crypto/khazad.c b/crypto/khazad.c index 738cb0dd1e7c..6809210362c1 100644 --- a/crypto/khazad.c +++ b/crypto/khazad.c @@ -22,8 +22,10 @@ #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 KHAZAD_KEY_SIZE 16 #define KHAZAD_BLOCK_SIZE 8 @@ -755,8 +757,8 @@ static const u64 c[KHAZAD_ROUNDS + 1] = { 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; int r; const u64 *S = T7; u64 K2, K1; @@ -767,22 +769,8 @@ static int khazad_setkey(void *ctx_arg, const u8 *in_key, return -EINVAL; } - K2 = ((u64)in_key[ 0] << 56) ^ - ((u64)in_key[ 1] << 48) ^ - ((u64)in_key[ 2] << 40) ^ - ((u64)in_key[ 3] << 32) ^ - ((u64)in_key[ 4] << 24) ^ - ((u64)in_key[ 5] << 16) ^ - ((u64)in_key[ 6] << 8) ^ - ((u64)in_key[ 7] ); - K1 = ((u64)in_key[ 8] << 56) ^ - ((u64)in_key[ 9] << 48) ^ - ((u64)in_key[10] << 40) ^ - ((u64)in_key[11] << 32) ^ - ((u64)in_key[12] << 24) ^ - ((u64)in_key[13] << 16) ^ - ((u64)in_key[14] << 8) ^ - ((u64)in_key[15] ); + K2 = be64_to_cpu(key[0]); + K1 = be64_to_cpu(key[1]); /* setup the encrypt key */ for (r = 0; r <= KHAZAD_ROUNDS; r++) { @@ -820,19 +808,12 @@ static int khazad_setkey(void *ctx_arg, const u8 *in_key, static void khazad_crypt(const u64 roundKey[KHAZAD_ROUNDS + 1], u8 *ciphertext, const u8 *plaintext) { - + const __be64 *src = (const __be64 *)plaintext; + __be64 *dst = (__be64 *)ciphertext; int r; u64 state; - state = ((u64)plaintext[0] << 56) ^ - ((u64)plaintext[1] << 48) ^ - ((u64)plaintext[2] << 40) ^ - ((u64)plaintext[3] << 32) ^ - ((u64)plaintext[4] << 24) ^ - ((u64)plaintext[5] << 16) ^ - ((u64)plaintext[6] << 8) ^ - ((u64)plaintext[7] ) ^ - roundKey[0]; + state = be64_to_cpu(*src) ^ roundKey[0]; for (r = 1; r < KHAZAD_ROUNDS; r++) { state = T0[(int)(state >> 56) ] ^ @@ -856,15 +837,7 @@ static void khazad_crypt(const u64 roundKey[KHAZAD_ROUNDS + 1], (T7[(int)(state ) & 0xff] & 0x00000000000000ffULL) ^ roundKey[KHAZAD_ROUNDS]; - ciphertext[0] = (u8)(state >> 56); - ciphertext[1] = (u8)(state >> 48); - ciphertext[2] = (u8)(state >> 40); - ciphertext[3] = (u8)(state >> 32); - ciphertext[4] = (u8)(state >> 24); - ciphertext[5] = (u8)(state >> 16); - ciphertext[6] = (u8)(state >> 8); - ciphertext[7] = (u8)(state ); - + *dst = cpu_to_be64(state); } static void khazad_encrypt(void *ctx_arg, u8 *dst, const u8 *src) |