1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* Maxim Tishkov 2016
* This file is distributed under the same license as OpenSSL
*/
#ifndef GOST_GRASSHOPPER_MATH_H
#define GOST_GRASSHOPPER_MATH_H
#if defined(__cplusplus)
extern "C" {
#endif
#include "gost_grasshopper_defines.h"
#if defined(__SSE__) || defined(__SSE2__) || defined(__SSE2_MATH__) || defined(__SSE3__) || defined(__SSE_MATH__) \
|| defined(__SSE4_1__)|| defined(__SSE4_2__)|| defined(__SSSE3__)
#define GRASSHOPPER_SSE_SUPPORTED
#endif
#define GRASSHOPPER_MIN_BITS 8
#define GRASSHOPPER_MAX_BITS 128
#if UINTPTR_MAX == 0xff
#define GRASSHOPPER_BITS 8
#elif UINTPTR_MAX == 0xffff
#define GRASSHOPPER_BITS 16
#elif UINTPTR_MAX == 0xffffffff
#define GRASSHOPPER_BITS 32
#elif UINTPTR_MAX == 0xffffffffffffffff
#define GRASSHOPPER_BITS 64
#endif
#define GRASSHOPPER_BIT_PARTS_8 (GRASSHOPPER_MAX_BITS / 8)
#define GRASSHOPPER_BIT_PARTS_16 (GRASSHOPPER_MAX_BITS / 16)
#define GRASSHOPPER_BIT_PARTS_32 (GRASSHOPPER_MAX_BITS / 32)
#define GRASSHOPPER_BIT_PARTS_64 (GRASSHOPPER_MAX_BITS / 64)
#define GRASSHOPPER_BIT_PARTS (GRASSHOPPER_MAX_BITS / GRASSHOPPER_BITS)
#define GRASSHOPPER_MAX_BIT_PARTS (GRASSHOPPER_MAX_BITS / GRASSHOPPER_MIN_BITS)
#define GRASSHOPPER_ACCESS_128_VALUE_8(key, part) ((key).b[(part)])
#define GRASSHOPPER_ACCESS_128_VALUE_16(key, part) ((key).w[(part)])
#define GRASSHOPPER_ACCESS_128_VALUE_32(key, part) ((key).d[(part)])
#define GRASSHOPPER_ACCESS_128_VALUE_64(key, part) ((key).q[(part)])
#if(GRASSHOPPER_BITS == 8)
#define GRASSHOPPER_ACCESS_128_VALUE GRASSHOPPER_ACCESS_128_VALUE_8
#elif(GRASSHOPPER_BITS == 16)
#define GRASSHOPPER_ACCESS_128_VALUE GRASSHOPPER_ACCESS_128_VALUE_16
#elif(GRASSHOPPER_BITS == 32)
#define GRASSHOPPER_ACCESS_128_VALUE GRASSHOPPER_ACCESS_128_VALUE_32
#elif(GRASSHOPPER_BITS == 64)
#define GRASSHOPPER_ACCESS_128_VALUE GRASSHOPPER_ACCESS_128_VALUE_64
#endif
static GRASSHOPPER_INLINE void grasshopper_zero128(grasshopper_w128_t* x) {
#if(GRASSHOPPER_BITS == 8 || GRASSHOPPER_BITS == 16)
memset(&x, 0, sizeof(x));
#else
int i;
for (i = 0; i < GRASSHOPPER_BIT_PARTS; i++) {
GRASSHOPPER_ACCESS_128_VALUE(*x, i) = 0;
}
#endif
}
static GRASSHOPPER_INLINE void grasshopper_copy128(grasshopper_w128_t* to, const grasshopper_w128_t* from) {
#if(GRASSHOPPER_BITS == 8 || GRASSHOPPER_BITS == 16)
__builtin_memcpy(&to, &from, sizeof(w128_t));
#else
int i;
for (i = 0; i < GRASSHOPPER_BIT_PARTS; i++) {
GRASSHOPPER_ACCESS_128_VALUE(*to, i) = GRASSHOPPER_ACCESS_128_VALUE(*from, i);
}
#endif
}
static GRASSHOPPER_INLINE void grasshopper_append128(grasshopper_w128_t* x, const grasshopper_w128_t* y) {
int i;
#ifdef STRICT_ALIGNMENT
for (i = 0; i < 16; i++) {
GRASSHOPPER_ACCESS_128_VALUE_8(*x, i) ^= GRASSHOPPER_ACCESS_128_VALUE_8(*y, i);
}
#else
for (i = 0; i < GRASSHOPPER_BIT_PARTS; i++) {
GRASSHOPPER_ACCESS_128_VALUE(*x, i) ^= GRASSHOPPER_ACCESS_128_VALUE(*y, i);
}
#endif
}
static GRASSHOPPER_INLINE void grasshopper_plus128(grasshopper_w128_t* result, const grasshopper_w128_t* x,
const grasshopper_w128_t* y) {
grasshopper_copy128(result, x);
grasshopper_append128(result, y);
}
// result & x must be different
static GRASSHOPPER_INLINE void grasshopper_plus128multi(grasshopper_w128_t* result, const grasshopper_w128_t* x,
const grasshopper_w128_t array[][256]) {
int i;
grasshopper_zero128(result);
for (i = 0; i < GRASSHOPPER_MAX_BIT_PARTS; i++) {
grasshopper_append128(result, &array[i][GRASSHOPPER_ACCESS_128_VALUE_8(*x, i)]);
}
}
static GRASSHOPPER_INLINE void grasshopper_append128multi(grasshopper_w128_t* result, grasshopper_w128_t* x,
const grasshopper_w128_t array[][256]) {
grasshopper_plus128multi(result, x, array);
grasshopper_copy128(x, result);
}
static GRASSHOPPER_INLINE void grasshopper_convert128(grasshopper_w128_t* x, const uint8_t* array) {
int i;
for (i = 0; i < GRASSHOPPER_MAX_BIT_PARTS; i++) {
GRASSHOPPER_ACCESS_128_VALUE_8(*x, i) = array[GRASSHOPPER_ACCESS_128_VALUE_8(*x, i)];
}
}
#define GRASSHOPPER_GALOIS_POWER 8
#define GRASSHOPPER_GALOIS_FIELD_SIZE ((1 << GRASSHOPPER_GALOIS_POWER) - 1)
extern uint8_t grasshopper_galois_alpha_to[256];
extern uint8_t grasshopper_galois_index_of[256];
static GRASSHOPPER_INLINE uint8_t grasshopper_galois_mul(uint8_t x, uint8_t y) {
if (likely(x != 0 && y != 0)) {
return grasshopper_galois_alpha_to[(grasshopper_galois_index_of[x] + grasshopper_galois_index_of[y]) %
GRASSHOPPER_GALOIS_FIELD_SIZE];
} else {
return 0;
}
}
#if defined(__cplusplus)
}
#endif
#endif
|
