[linux-2.6-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/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];
};

#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)

static const union aegis_block crypto_aegis_const[2] = {
	{ .words64 = {
		cpu_to_le64(U64_C(0x0d08050302010100)),
		cpu_to_le64(U64_C(0x6279e99059372215)),
	} },
	{ .words64 = {
		cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
		cpu_to_le64(U64_C(0xdd28b57342311120)),
	} },
};

static 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 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 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 *t0 = crypto_ft_tab[0];
	const u32 *t1 = crypto_ft_tab[1];
	const u32 *t2 = crypto_ft_tab[2];
	const u32 *t3 = crypto_ft_tab[3];
	u32 d0, d1, d2, d3;

	d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]];
	d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]];
	d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]];
	d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]];

	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>
	13	#include <linux/types.h>
	14
	15	#define AEGIS_BLOCK_SIZE 16
	16
	17	union aegis_block {
	18	__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
4a34e3c2	19	__le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)];
f606a88e OM	20	u8 bytes[AEGIS_BLOCK_SIZE];
	21	};
	22
	23	#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
	24	#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
	25
	26	static const union aegis_block crypto_aegis_const[2] = {
	27	{ .words64 = {
	28	cpu_to_le64(U64_C(0x0d08050302010100)),
	29	cpu_to_le64(U64_C(0x6279e99059372215)),
	30	} },
	31	{ .words64 = {
	32	cpu_to_le64(U64_C(0xf12fc26d55183ddb)),
	33	cpu_to_le64(U64_C(0xdd28b57342311120)),
	34	} },
	35	};
	36
	37	static void crypto_aegis_block_xor(union aegis_block *dst,
	38	const union aegis_block *src)
	39	{
	40	dst->words64[0] ^= src->words64[0];
	41	dst->words64[1] ^= src->words64[1];
	42	}
	43
	44	static void crypto_aegis_block_and(union aegis_block *dst,
	45	const union aegis_block *src)
	46	{
	47	dst->words64[0] &= src->words64[0];
	48	dst->words64[1] &= src->words64[1];
	49	}
	50
	51	static void crypto_aegis_aesenc(union aegis_block *dst,
	52	const union aegis_block *src,
	53	const union aegis_block *key)
	54	{
f606a88e	55	const u8 *s = src->bytes;
f606a88e OM	56	const u32 *t0 = crypto_ft_tab[0];
	57	const u32 *t1 = crypto_ft_tab[1];
	58	const u32 *t2 = crypto_ft_tab[2];
	59	const u32 *t3 = crypto_ft_tab[3];
	60	u32 d0, d1, d2, d3;
	61
4a34e3c2 AB	62	d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]];
	63	d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]];
	64	d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]];
	65	d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]];
f606a88e	66
4a34e3c2 AB	67	dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0];
	68	dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1];
	69	dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2];
	70	dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3];
f606a88e OM	71	}
	72
	73	#endif /* _CRYPTO_AEGIS_H */