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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 | ||
24 | #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block)) | |
25 | #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN) | |
26 | ||
97ac82d9 AB |
27 | static __always_inline void crypto_aegis_block_xor(union aegis_block *dst, |
28 | const union aegis_block *src) | |
f606a88e OM |
29 | { |
30 | dst->words64[0] ^= src->words64[0]; | |
31 | dst->words64[1] ^= src->words64[1]; | |
32 | } | |
33 | ||
97ac82d9 AB |
34 | static __always_inline void crypto_aegis_block_and(union aegis_block *dst, |
35 | const union aegis_block *src) | |
f606a88e OM |
36 | { |
37 | dst->words64[0] &= src->words64[0]; | |
38 | dst->words64[1] &= src->words64[1]; | |
39 | } | |
40 | ||
97ac82d9 AB |
41 | static __always_inline void crypto_aegis_aesenc(union aegis_block *dst, |
42 | const union aegis_block *src, | |
43 | const union aegis_block *key) | |
f606a88e | 44 | { |
f606a88e | 45 | const u8 *s = src->bytes; |
521cdde7 | 46 | const u32 *t = crypto_ft_tab[0]; |
f606a88e OM |
47 | u32 d0, d1, d2, d3; |
48 | ||
521cdde7 AB |
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); | |
f606a88e | 53 | |
4a34e3c2 AB |
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]; | |
f606a88e OM |
58 | } |
59 | ||
60 | #endif /* _CRYPTO_AEGIS_H */ |