-
Notifications
You must be signed in to change notification settings - Fork 1
/
Copy pathpack_unpack.c
208 lines (195 loc) · 7.97 KB
/
pack_unpack.c
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
#include "pack_unpack.h"
#include "api.h"
#include <string.h>
void POLT2BS(uint8_t bytes[SABER_SCALEBYTES_KEM], const uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
#if SABER_ET == 3
for (j = 0; j < SABER_N / 8; j++)
{
offset_byte = 3 * j;
offset_data = 8 * j;
bytes[offset_byte + 0] = (data[offset_data + 0] & 0x7) | ((data[offset_data + 1] & 0x7) << 3) | ((data[offset_data + 2] & 0x3) << 6);
bytes[offset_byte + 1] = ((data[offset_data + 2] >> 2) & 0x01) | ((data[offset_data + 3] & 0x7) << 1) | ((data[offset_data + 4] & 0x7) << 4) | (((data[offset_data + 5]) & 0x01) << 7);
bytes[offset_byte + 2] = ((data[offset_data + 5] >> 1) & 0x03) | ((data[offset_data + 6] & 0x7) << 2) | ((data[offset_data + 7] & 0x7) << 5);
}
#elif SABER_ET == 4
for (j = 0; j < SABER_N / 2; j++)
{
offset_byte = j;
offset_data = 2 * j;
bytes[offset_byte] = (data[offset_data] & 0x0f) | ((data[offset_data + 1] & 0x0f) << 4);
}
#elif SABER_ET == 6
for (j = 0; j < SABER_N / 4; j++)
{
offset_byte = 3 * j;
offset_data = 4 * j;
bytes[offset_byte + 0] = (data[offset_data + 0] & 0x3f) | ((data[offset_data + 1] & 0x03) << 6);
bytes[offset_byte + 1] = ((data[offset_data + 1] >> 2) & 0x0f) | ((data[offset_data + 2] & 0x0f) << 4);
bytes[offset_byte + 2] = ((data[offset_data + 2] >> 4) & 0x03) | ((data[offset_data + 3] & 0x3f) << 2);
}
#else
#error "Unsupported SABER parameter."
#endif
}
void BS2POLT(const uint8_t bytes[SABER_SCALEBYTES_KEM], uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
#if SABER_ET == 3
for (j = 0; j < SABER_N / 8; j++)
{
offset_byte = 3 * j;
offset_data = 8 * j;
data[offset_data + 0] = (bytes[offset_byte + 0]) & 0x07;
data[offset_data + 1] = ((bytes[offset_byte + 0]) >> 3) & 0x07;
data[offset_data + 2] = (((bytes[offset_byte + 0]) >> 6) & 0x03) | (((bytes[offset_byte + 1]) & 0x01) << 2);
data[offset_data + 3] = ((bytes[offset_byte + 1]) >> 1) & 0x07;
data[offset_data + 4] = ((bytes[offset_byte + 1]) >> 4) & 0x07;
data[offset_data + 5] = (((bytes[offset_byte + 1]) >> 7) & 0x01) | (((bytes[offset_byte + 2]) & 0x03) << 1);
data[offset_data + 6] = ((bytes[offset_byte + 2] >> 2) & 0x07);
data[offset_data + 7] = ((bytes[offset_byte + 2] >> 5) & 0x07);
}
#elif SABER_ET == 4
for (j = 0; j < SABER_N / 2; j++)
{
offset_byte = j;
offset_data = 2 * j;
data[offset_data] = bytes[offset_byte] & 0x0f;
data[offset_data + 1] = (bytes[offset_byte] >> 4) & 0x0f;
}
#elif SABER_ET == 6
for (j = 0; j < SABER_N / 4; j++)
{
offset_byte = 3 * j;
offset_data = 4 * j;
data[offset_data + 0] = bytes[offset_byte + 0] & 0x3f;
data[offset_data + 1] = ((bytes[offset_byte + 0] >> 6) & 0x03) | ((bytes[offset_byte + 1] & 0x0f) << 2);
data[offset_data + 2] = ((bytes[offset_byte + 1] & 0xff) >> 4) | ((bytes[offset_byte + 2] & 0x03) << 4);
data[offset_data + 3] = ((bytes[offset_byte + 2] & 0xff) >> 2);
}
#else
#error "Unsupported SABER parameter."
#endif
}
static void POLq2BS(uint8_t bytes[SABER_POLYBYTES], const uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
for (j = 0; j < SABER_N / 8; j++)
{
offset_byte = 13 * j;
offset_data = 8 * j;
bytes[offset_byte + 0] = (data[offset_data + 0] & (0xff));
bytes[offset_byte + 1] = ((data[offset_data + 0] >> 8) & 0x1f) | ((data[offset_data + 1] & 0x07) << 5);
bytes[offset_byte + 2] = ((data[offset_data + 1] >> 3) & 0xff);
bytes[offset_byte + 3] = ((data[offset_data + 1] >> 11) & 0x03) | ((data[offset_data + 2] & 0x3f) << 2);
bytes[offset_byte + 4] = ((data[offset_data + 2] >> 6) & 0x7f) | ((data[offset_data + 3] & 0x01) << 7);
bytes[offset_byte + 5] = ((data[offset_data + 3] >> 1) & 0xff);
bytes[offset_byte + 6] = ((data[offset_data + 3] >> 9) & 0x0f) | ((data[offset_data + 4] & 0x0f) << 4);
bytes[offset_byte + 7] = ((data[offset_data + 4] >> 4) & 0xff);
bytes[offset_byte + 8] = ((data[offset_data + 4] >> 12) & 0x01) | ((data[offset_data + 5] & 0x7f) << 1);
bytes[offset_byte + 9] = ((data[offset_data + 5] >> 7) & 0x3f) | ((data[offset_data + 6] & 0x03) << 6);
bytes[offset_byte + 10] = ((data[offset_data + 6] >> 2) & 0xff);
bytes[offset_byte + 11] = ((data[offset_data + 6] >> 10) & 0x07) | ((data[offset_data + 7] & 0x1f) << 3);
bytes[offset_byte + 12] = ((data[offset_data + 7] >> 5) & 0xff);
}
}
static void BS2POLq(const uint8_t bytes[SABER_POLYBYTES], uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
for (j = 0; j < SABER_N / 8; j++)
{
offset_byte = 13 * j;
offset_data = 8 * j;
data[offset_data + 0] = (bytes[offset_byte + 0] & (0xff)) | ((bytes[offset_byte + 1] & 0x1f) << 8);
data[offset_data + 1] = (bytes[offset_byte + 1] >> 5 & (0x07)) | ((bytes[offset_byte + 2] & 0xff) << 3) | ((bytes[offset_byte + 3] & 0x03) << 11);
data[offset_data + 2] = (bytes[offset_byte + 3] >> 2 & (0x3f)) | ((bytes[offset_byte + 4] & 0x7f) << 6);
data[offset_data + 3] = (bytes[offset_byte + 4] >> 7 & (0x01)) | ((bytes[offset_byte + 5] & 0xff) << 1) | ((bytes[offset_byte + 6] & 0x0f) << 9);
data[offset_data + 4] = (bytes[offset_byte + 6] >> 4 & (0x0f)) | ((bytes[offset_byte + 7] & 0xff) << 4) | ((bytes[offset_byte + 8] & 0x01) << 12);
data[offset_data + 5] = (bytes[offset_byte + 8] >> 1 & (0x7f)) | ((bytes[offset_byte + 9] & 0x3f) << 7);
data[offset_data + 6] = (bytes[offset_byte + 9] >> 6 & (0x03)) | ((bytes[offset_byte + 10] & 0xff) << 2) | ((bytes[offset_byte + 11] & 0x07) << 10);
data[offset_data + 7] = (bytes[offset_byte + 11] >> 3 & (0x1f)) | ((bytes[offset_byte + 12] & 0xff) << 5);
}
}
static void POLp2BS(uint8_t bytes[SABER_POLYCOMPRESSEDBYTES], const uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
for (j = 0; j < SABER_N / 4; j++)
{
offset_byte = 5 * j;
offset_data = 4 * j;
bytes[offset_byte + 0] = (data[offset_data + 0] & (0xff));
bytes[offset_byte + 1] = ((data[offset_data + 0] >> 8) & 0x03) | ((data[offset_data + 1] & 0x3f) << 2);
bytes[offset_byte + 2] = ((data[offset_data + 1] >> 6) & 0x0f) | ((data[offset_data + 2] & 0x0f) << 4);
bytes[offset_byte + 3] = ((data[offset_data + 2] >> 4) & 0x3f) | ((data[offset_data + 3] & 0x03) << 6);
bytes[offset_byte + 4] = ((data[offset_data + 3] >> 2) & 0xff);
}
}
static void BS2POLp(const uint8_t bytes[SABER_POLYCOMPRESSEDBYTES], uint16_t data[SABER_N])
{
size_t j, offset_byte, offset_data;
for (j = 0; j < SABER_N / 4; j++)
{
offset_byte = 5 * j;
offset_data = 4 * j;
data[offset_data + 0] = (bytes[offset_byte + 0] & (0xff)) | ((bytes[offset_byte + 1] & 0x03) << 8);
data[offset_data + 1] = ((bytes[offset_byte + 1] >> 2) & (0x3f)) | ((bytes[offset_byte + 2] & 0x0f) << 6);
data[offset_data + 2] = ((bytes[offset_byte + 2] >> 4) & (0x0f)) | ((bytes[offset_byte + 3] & 0x3f) << 4);
data[offset_data + 3] = ((bytes[offset_byte + 3] >> 6) & (0x03)) | ((bytes[offset_byte + 4] & 0xff) << 2);
}
}
void POLVECq2BS(uint8_t bytes[SABER_POLYVECBYTES], const uint16_t data[SABER_L][SABER_N])
{
size_t i;
for (i = 0; i < SABER_L; i++)
{
POLq2BS(bytes + i * SABER_POLYBYTES, data[i]);
}
}
void BS2POLVECq(const uint8_t bytes[SABER_POLYVECBYTES], uint16_t data[SABER_L][SABER_N])
{
size_t i;
for (i = 0; i < SABER_L; i++)
{
BS2POLq(bytes + i * SABER_POLYBYTES, data[i]);
}
}
void POLVECp2BS(uint8_t bytes[SABER_POLYVECCOMPRESSEDBYTES], const uint16_t data[SABER_L][SABER_N])
{
size_t i;
for (i = 0; i < SABER_L; i++)
{
POLp2BS(bytes + i * (SABER_EP * SABER_N / 8), data[i]);
}
}
void BS2POLVECp(const uint8_t bytes[SABER_POLYVECCOMPRESSEDBYTES], uint16_t data[SABER_L][SABER_N])
{
size_t i;
for (i = 0; i < SABER_L; i++)
{
BS2POLp(bytes + i * (SABER_EP * SABER_N / 8), data[i]);
}
}
void BS2POLmsg(const uint8_t bytes[SABER_KEYBYTES], uint16_t data[SABER_N])
{
size_t i, j;
for (j = 0; j < SABER_KEYBYTES; j++)
{
for (i = 0; i < 8; i++)
{
data[j * 8 + i] = ((bytes[j] >> i) & 0x01);
}
}
}
void POLmsg2BS(uint8_t bytes[SABER_KEYBYTES], const uint16_t data[SABER_N])
{
size_t i, j;
memset(bytes, 0, SABER_KEYBYTES);
for (j = 0; j < SABER_KEYBYTES; j++)
{
for (i = 0; i < 8; i++)
{
bytes[j] = bytes[j] | ((data[j * 8 + i] & 0x01) << i);
}
}
}