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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> | |
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 */ |