[linux-block.git] / crypto / aegis.h

/* 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 */
Commit	Line	Data
ea5d8cfa	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
f606a88e OM	2	/*
	3	* AEGIS common definitions
	4	*
	5	* Copyright (c) 2018 Ondrej Mosnacek <omosnacek@gmail.com>
	6	* Copyright (c) 2018 Red Hat, Inc. All rights reserved.
f606a88e OM	7	*/
	8
	9	#ifndef _CRYPTO_AEGIS_H
	10	#define _CRYPTO_AEGIS_H
	11
	12	#include <crypto/aes.h>
521cdde7	13	#include <linux/bitops.h>
f606a88e OM	14	#include <linux/types.h>
	15
	16	#define AEGIS_BLOCK_SIZE 16
	17
	18	union aegis_block {
	19	__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
4a34e3c2	20	__le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)];
f606a88e OM	21	u8 bytes[AEGIS_BLOCK_SIZE];
	22	};
	23
09149997 HX	24	struct aegis_state;
	25
	26	extern int aegis128_have_aes_insn;
	27
f606a88e OM	28	#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
	29	#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
	30
09149997 HX	31	bool crypto_aegis128_have_simd(void);
	32	void crypto_aegis128_update_simd(struct aegis_state state, const void msg);
	33	void crypto_aegis128_init_simd(struct aegis_state *state,
	34	const union aegis_block *key,
	35	const u8 *iv);
	36	void crypto_aegis128_encrypt_chunk_simd(struct aegis_state state, u8 dst,
	37	const u8 *src, unsigned int size);
	38	void crypto_aegis128_decrypt_chunk_simd(struct aegis_state state, u8 dst,
	39	const u8 *src, unsigned int size);
	40	int crypto_aegis128_final_simd(struct aegis_state *state,
	41	union aegis_block *tag_xor,
	42	unsigned int assoclen,
	43	unsigned int cryptlen,
	44	unsigned int authsize);
	45
97ac82d9 AB	46	static __always_inline void crypto_aegis_block_xor(union aegis_block *dst,
97ac82d9 AB	47	const union aegis_block *src)
f606a88e OM	48	{
	49	dst->words64[0] ^= src->words64[0];
	50	dst->words64[1] ^= src->words64[1];
	51	}
	52
97ac82d9 AB	53	static __always_inline void crypto_aegis_block_and(union aegis_block *dst,
97ac82d9 AB	54	const union aegis_block *src)
f606a88e OM	55	{
	56	dst->words64[0] &= src->words64[0];
	57	dst->words64[1] &= src->words64[1];
	58	}
	59
97ac82d9 AB	60	static __always_inline void crypto_aegis_aesenc(union aegis_block *dst,
	61	const union aegis_block *src,
	62	const union aegis_block *key)
f606a88e	63	{
f606a88e	64	const u8 *s = src->bytes;
521cdde7	65	const u32 *t = crypto_ft_tab[0];
f606a88e OM	66	u32 d0, d1, d2, d3;
f606a88e OM	67
521cdde7 AB	68	d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24);
	69	d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24);
	70	d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24);
	71	d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24);
f606a88e	72
4a34e3c2 AB	73	dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0];
	74	dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1];
	75	dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2];
	76	dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3];
f606a88e OM	77	}
	78
	79	#endif /* _CRYPTO_AEGIS_H */