Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/crypto/aegis.h
26131 views
1
/* SPDX-License-Identifier: GPL-2.0-or-later */

2
/*

3
 * AEGIS common definitions

4
 *

5
 * Copyright (c) 2018 Ondrej Mosnacek <[email protected]>

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


81