/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* AEGIS common definitions
*
* Copyright (c) 2018 Ondrej Mosnacek <omosnacek@gmail.com>
* Copyright (c) 2018 Red Hat, Inc. All rights reserved.
*/
#ifndef _CRYPTO_AEGIS_H
#define _CRYPTO_AEGIS_H
#include <crypto/aes.h>
#include <linux/bitops.h>
#include <linux/types.h>
#define AEGIS_BLOCK_SIZE 16
union aegis_block {
__le64 words64[AEGIS_BLOCK_SIZE / sizeof (__le64)];
__le32 words32[AEGIS_BLOCK_SIZE / sizeof (__le32)];
u8 bytes[AEGIS_BLOCK_SIZE];
};
struct aegis_state;
extern int aegis128_have_aes_insn;
#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
bool crypto_aegis128_have_simd(void );
void crypto_aegis128_update_simd(struct aegis_state *state, const void *msg);
void crypto_aegis128_init_simd(struct aegis_state *state,
const union aegis_block *key,
const u8 *iv);
void crypto_aegis128_encrypt_chunk_simd(struct aegis_state *state, u8 *dst,
const u8 *src, unsigned int size);
void crypto_aegis128_decrypt_chunk_simd(struct aegis_state *state, u8 *dst,
const u8 *src, unsigned int size);
int crypto_aegis128_final_simd(struct aegis_state *state,
union aegis_block *tag_xor,
unsigned int assoclen,
unsigned int cryptlen,
unsigned int authsize);
static __always_inline void crypto_aegis_block_xor(union aegis_block *dst,
const union aegis_block *src)
{
dst->words64[0 ] ^= src->words64[0 ];
dst->words64[1 ] ^= src->words64[1 ];
}
static __always_inline void crypto_aegis_block_and(union aegis_block *dst,
const union aegis_block *src)
{
dst->words64[0 ] &= src->words64[0 ];
dst->words64[1 ] &= src->words64[1 ];
}
static __always_inline void crypto_aegis_aesenc(union aegis_block *dst,
const union aegis_block *src,
const union aegis_block *key)
{
const u8 *s = src->bytes;
const u32 *t = crypto_ft_tab[0 ];
u32 d0, d1, d2, d3;
d0 = t[s[ 0 ]] ^ rol32(t[s[ 5 ]], 8 ) ^ rol32(t[s[10 ]], 16 ) ^ rol32(t[s[15 ]], 24 );
d1 = t[s[ 4 ]] ^ rol32(t[s[ 9 ]], 8 ) ^ rol32(t[s[14 ]], 16 ) ^ rol32(t[s[ 3 ]], 24 );
d2 = t[s[ 8 ]] ^ rol32(t[s[13 ]], 8 ) ^ rol32(t[s[ 2 ]], 16 ) ^ rol32(t[s[ 7 ]], 24 );
d3 = t[s[12 ]] ^ rol32(t[s[ 1 ]], 8 ) ^ rol32(t[s[ 6 ]], 16 ) ^ rol32(t[s[11 ]], 24 );
dst->words32[0 ] = cpu_to_le32(d0) ^ key->words32[0 ];
dst->words32[1 ] = cpu_to_le32(d1) ^ key->words32[1 ];
dst->words32[2 ] = cpu_to_le32(d2) ^ key->words32[2 ];
dst->words32[3 ] = cpu_to_le32(d3) ^ key->words32[3 ];
}
#endif /* _CRYPTO_AEGIS_H */
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