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crypto: Add aesenc_SB_SR_AK

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Start adding infrastructure for accelerating guest AES.
Begin with a SubBytes + ShiftRows + AddRoundKey primitive.

Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-06-01 21:57:10 -07:00
parent e20e14d2b1
commit 6b0a96ce3a
4 changed files with 107 additions and 0 deletions
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44
include/crypto/aes-round.h Normal file
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/*
* AES round fragments, generic version
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (C) 2023 Linaro, Ltd.
*/
#ifndef CRYPTO_AES_ROUND_H
#define CRYPTO_AES_ROUND_H
/* Hosts with acceleration will usually need a 16-byte vector type. */
typedef uint8_t AESStateVec __attribute__((vector_size(16)));
typedef union {
uint8_t b[16];
uint32_t w[4];
uint64_t d[2];
AESStateVec v;
} AESState;
#include "host/crypto/aes-round.h"
/*
* Perform SubBytes + ShiftRows + AddRoundKey.
*/
void aesenc_SB_SR_AK_gen(AESState *ret, const AESState *st,
const AESState *rk);
void aesenc_SB_SR_AK_genrev(AESState *ret, const AESState *st,
const AESState *rk);
static inline void aesenc_SB_SR_AK(AESState *r, const AESState *st,
const AESState *rk, bool be)
{
if (HAVE_AES_ACCEL) {
aesenc_SB_SR_AK_accel(r, st, rk, be);
} else if (HOST_BIG_ENDIAN == be) {
aesenc_SB_SR_AK_gen(r, st, rk);
} else {
aesenc_SB_SR_AK_genrev(r, st, rk);
}
}
#endif /* CRYPTO_AES_ROUND_H */