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crypto: arm/aes - use native endiannes for key schedule

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Align ARM's hw instruction based AES implementation with other versions
that keep the key schedule in native endianness. This will allow us to
merge the various implementations going forward.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2019-07-02 21:41:37 +02:00 • committed by Herbert Xu
parent 4d3f9d89c7
commit fafb1dca6f
2 changed files with 13 additions and 16 deletions
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20
arch/arm/crypto/aes-ce-core.S
View file

@ -88,19 +88,19 @@
.macro do_block, dround, fround
cmp r3, #12 @ which key size?
vld1.8 {q10-q11}, [ip]!
vld1.32 {q10-q11}, [ip]!
\dround q8, q9
vld1.8 {q12-q13}, [ip]!
vld1.32 {q12-q13}, [ip]!
\dround q10, q11
vld1.8 {q10-q11}, [ip]!
vld1.32 {q10-q11}, [ip]!
\dround q12, q13
vld1.8 {q12-q13}, [ip]!
vld1.32 {q12-q13}, [ip]!
\dround q10, q11
blo 0f @ AES-128: 10 rounds
vld1.8 {q10-q11}, [ip]!
vld1.32 {q10-q11}, [ip]!
\dround q12, q13
beq 1f @ AES-192: 12 rounds
vld1.8 {q12-q13}, [ip]
vld1.32 {q12-q13}, [ip]
\dround q10, q11
0: \fround q12, q13, q14
bx lr
@ -149,8 +149,8 @@ ENDPROC(aes_decrypt_3x)
.macro prepare_key, rk, rounds
add ip, \rk, \rounds, lsl #4
vld1.8 {q8-q9}, [\rk] @ load first 2 round keys
vld1.8 {q14}, [ip] @ load last round key
vld1.32 {q8-q9}, [\rk] @ load first 2 round keys
vld1.32 {q14}, [ip] @ load last round key
.endm
/*
@ -505,8 +505,8 @@ ENDPROC(ce_aes_sub)
* operation on round key *src
*/
ENTRY(ce_aes_invert)
vld1.8 {q0}, [r1]
vld1.32 {q0}, [r1]
aesimc.8 q0, q0
vst1.8 {q0}, [r0]
vst1.32 {q0}, [r0]
bx lr
ENDPROC(ce_aes_invert)

9
arch/arm/crypto/aes-ce-glue.c
View file

@ -7,6 +7,7 @@
#include <asm/hwcap.h>
#include <asm/neon.h>
#include <asm/unaligned.h>
#include <crypto/aes.h>
#include <crypto/internal/simd.h>
#include <crypto/internal/skcipher.h>
@ -77,21 +78,17 @@ static int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
key_len != AES_KEYSIZE_256)
return -EINVAL;
memcpy(ctx->key_enc, in_key, key_len);
ctx->key_length = key_len;
for (i = 0; i < kwords; i++)
ctx->key_enc[i] = get_unaligned_le32(in_key + i * sizeof(u32));
kernel_neon_begin();
for (i = 0; i < sizeof(rcon); i++) {
u32 *rki = ctx->key_enc + (i * kwords);
u32 *rko = rki + kwords;
#ifndef CONFIG_CPU_BIG_ENDIAN
rko[0] = ror32(ce_aes_sub(rki[kwords - 1]), 8);
rko[0] = rko[0] ^ rki[0] ^ rcon[i];
#else
rko[0] = rol32(ce_aes_sub(rki[kwords - 1]), 8);
rko[0] = rko[0] ^ rki[0] ^ (rcon[i] << 24);
#endif
rko[1] = rko[0] ^ rki[1];
rko[2] = rko[1] ^ rki[2];
rko[3] = rko[2] ^ rki[3];