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crypto: aria - stop using cra_alignmask

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Instead of specifying a nonzero alignmask, use the unaligned access
helpers.  This eliminates unnecessary alignment operations on most CPUs,
which can handle unaligned accesses efficiently, and brings us a step
closer to eventually removing support for the alignmask field.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2024-12-07 11:57:46 -08:00 committed by Herbert Xu
parent 8d90528228
commit 6c178fd66b
1 changed files with 17 additions and 20 deletions
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37
crypto/aria_generic.c
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@ -15,6 +15,7 @@
*/
#include <crypto/aria.h>
#include <linux/unaligned.h>
static const u32 key_rc[20] = {
0x517cc1b7, 0x27220a94, 0xfe13abe8, 0xfa9a6ee0,
@ -27,7 +28,6 @@ static const u32 key_rc[20] = {
static void aria_set_encrypt_key(struct aria_ctx *ctx, const u8 *in_key,
unsigned int key_len)
{
const __be32 *key = (const __be32 *)in_key;
u32 w0[4], w1[4], w2[4], w3[4];
u32 reg0, reg1, reg2, reg3;
const u32 *ck;
@ -35,10 +35,10 @@ static void aria_set_encrypt_key(struct aria_ctx *ctx, const u8 *in_key,
ck = &key_rc[(key_len - 16) / 2];
w0[0] = be32_to_cpu(key[0]);
w0[1] = be32_to_cpu(key[1]);
w0[2] = be32_to_cpu(key[2]);
w0[3] = be32_to_cpu(key[3]);
w0[0] = get_unaligned_be32(&in_key[0]);
w0[1] = get_unaligned_be32(&in_key[4]);
w0[2] = get_unaligned_be32(&in_key[8]);
w0[3] = get_unaligned_be32(&in_key[12]);
reg0 = w0[0] ^ ck[0];
reg1 = w0[1] ^ ck[1];
@ -48,11 +48,11 @@ static void aria_set_encrypt_key(struct aria_ctx *ctx, const u8 *in_key,
aria_subst_diff_odd(&reg0, &reg1, &reg2, &reg3);
if (key_len > 16) {
w1[0] = be32_to_cpu(key[4]);
w1[1] = be32_to_cpu(key[5]);
w1[0] = get_unaligned_be32(&in_key[16]);
w1[1] = get_unaligned_be32(&in_key[20]);
if (key_len > 24) {
w1[2] = be32_to_cpu(key[6]);
w1[3] = be32_to_cpu(key[7]);
w1[2] = get_unaligned_be32(&in_key[24]);
w1[3] = get_unaligned_be32(&in_key[28]);
} else {
w1[2] = 0;
w1[3] = 0;
@ -195,17 +195,15 @@ EXPORT_SYMBOL_GPL(aria_set_key);
static void __aria_crypt(struct aria_ctx *ctx, u8 *out, const u8 *in,
u32 key[][ARIA_RD_KEY_WORDS])
{
const __be32 *src = (const __be32 *)in;
__be32 *dst = (__be32 *)out;
u32 reg0, reg1, reg2, reg3;
int rounds, rkidx = 0;
rounds = ctx->rounds;
reg0 = be32_to_cpu(src[0]);
reg1 = be32_to_cpu(src[1]);
reg2 = be32_to_cpu(src[2]);
reg3 = be32_to_cpu(src[3]);
reg0 = get_unaligned_be32(&in[0]);
reg1 = get_unaligned_be32(&in[4]);
reg2 = get_unaligned_be32(&in[8]);
reg3 = get_unaligned_be32(&in[12]);
aria_add_round_key(key[rkidx], &reg0, &reg1, &reg2, &reg3);
rkidx++;
@ -241,10 +239,10 @@ static void __aria_crypt(struct aria_ctx *ctx, u8 *out, const u8 *in,
(u8)(s1[get_u8(reg3, 2)]),
(u8)(s2[get_u8(reg3, 3)]));
dst[0] = cpu_to_be32(reg0);
dst[1] = cpu_to_be32(reg1);
dst[2] = cpu_to_be32(reg2);
dst[3] = cpu_to_be32(reg3);
put_unaligned_be32(reg0, &out[0]);
put_unaligned_be32(reg1, &out[4]);
put_unaligned_be32(reg2, &out[8]);
put_unaligned_be32(reg3, &out[12]);
}
void aria_encrypt(void *_ctx, u8 *out, const u8 *in)
@ -284,7 +282,6 @@ static struct crypto_alg aria_alg = {
.cra_flags = CRYPTO_ALG_TYPE_CIPHER,
.cra_blocksize = ARIA_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct aria_ctx),
.cra_alignmask = 3,
.cra_module = THIS_MODULE,
.cra_u = {
.cipher = {