1/* SPDX-License-Identifier: GPL-2.0-or-later */
 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.
 7 */
 8
 9#ifndef _CRYPTO_AEGIS_H
10#define _CRYPTO_AEGIS_H
11
12#include <crypto/aes.h>
13#include <linux/bitops.h>
14#include <linux/types.h>
15
16#define AEGIS_BLOCK_SIZE 16
17
18union aegis_block {
19	__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
20	__le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)];
21	u8 bytes[AEGIS_BLOCK_SIZE];
22};
23
24#define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
25#define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
26
27static __always_inline void crypto_aegis_block_xor(union aegis_block *dst,
28						   const union aegis_block *src)
29{
30	dst->words64[0] ^= src->words64[0];
31	dst->words64[1] ^= src->words64[1];
32}
33
34static __always_inline void crypto_aegis_block_and(union aegis_block *dst,
35						   const union aegis_block *src)
36{
37	dst->words64[0] &= src->words64[0];
38	dst->words64[1] &= src->words64[1];
39}
40
41static __always_inline void crypto_aegis_aesenc(union aegis_block *dst,
42						const union aegis_block *src,
43						const union aegis_block *key)
44{
45	const u8  *s  = src->bytes;
46	const u32 *t = crypto_ft_tab[0];
47	u32 d0, d1, d2, d3;
48
49	d0 = t[s[ 0]] ^ rol32(t[s[ 5]], 8) ^ rol32(t[s[10]], 16) ^ rol32(t[s[15]], 24);
50	d1 = t[s[ 4]] ^ rol32(t[s[ 9]], 8) ^ rol32(t[s[14]], 16) ^ rol32(t[s[ 3]], 24);
51	d2 = t[s[ 8]] ^ rol32(t[s[13]], 8) ^ rol32(t[s[ 2]], 16) ^ rol32(t[s[ 7]], 24);
52	d3 = t[s[12]] ^ rol32(t[s[ 1]], 8) ^ rol32(t[s[ 6]], 16) ^ rol32(t[s[11]], 24);
53
54	dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0];
55	dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1];
56	dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2];
57	dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3];
58}
59
60#endif /* _CRYPTO_AEGIS_H */