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
18 union 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 struct aegis_state;
25
26 extern int aegis128_have_aes_insn;
27
28 #define AEGIS_BLOCK_ALIGN (__alignof__(union aegis_block))
29 #define AEGIS_ALIGNED(p) IS_ALIGNED((uintptr_t)p, AEGIS_BLOCK_ALIGN)
30
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
46 static __always_inline void crypto_aegis_block_xor(union aegis_block *dst,
47 const union aegis_block *src)
48 {
49 dst->words64[0] ^= src->words64[0];
50 dst->words64[1] ^= src->words64[1];
51 }
52
53 static __always_inline void crypto_aegis_block_and(union aegis_block *dst,
54 const union aegis_block *src)
55 {
56 dst->words64[0] &= src->words64[0];
57 dst->words64[1] &= src->words64[1];
58 }
59
60 static __always_inline void crypto_aegis_aesenc(union aegis_block *dst,
61 const union aegis_block *src,
62 const union aegis_block *key)
63 {
64 const u8 *s = src->bytes;
65 const u32 *t = crypto_ft_tab[0];
66 u32 d0, d1, d2, d3;
67
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);
72
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];
77 }
78
79 #endif /* _CRYPTO_AEGIS_H */
80
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