Outline ![]()
Files ![]()
loading...
SourceVu![]()
ESP-IDF Framework and Examples![]()
ESP-IDF![]()
components/bt/esp_ble_mesh/common/tinycrypt/src/aes_encrypt.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
/* aes_encrypt.c - TinyCrypt implementation of AES encryption procedure */
/*
* Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <tinycrypt/aes.h>
#include <tinycrypt/utils.h>
#include <tinycrypt/constants.h>
static const uint8_t sbox[256] = {
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b,
0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0,
0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26,
0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2,
0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0,
0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed,
0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f,
0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5,
0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec,
0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14,
0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c,
0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d,
0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f,
0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e,
0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11,
0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f,
0xb0, 0x54, 0xbb, 0x16
};
static inline unsigned int rotword(unsigned int a)
{
return (((a) >> 24) | ((a) << 8));
}
#define subbyte(a, o)(sbox[((a) >> (o))&0xff] << (o))
#define subword(a)(subbyte(a, 24)|subbyte(a, 16)|subbyte(a, 8)|subbyte(a, 0))
int tc_aes128_set_encrypt_key(TCAesKeySched_t s, const uint8_t *k)
{
const unsigned int rconst[11] = {
0x00000000, 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000,
0x20000000, 0x40000000, 0x80000000, 0x1b000000, 0x36000000
};
unsigned int i;
unsigned int t;
if (s == (TCAesKeySched_t) 0) {
return TC_CRYPTO_FAIL;
} else if (k == (const uint8_t *) 0) {
return TC_CRYPTO_FAIL;
}
for (i = 0; i < Nk; ++i) {
s->words[i] = (k[Nb * i] << 24) | (k[Nb * i + 1] << 16) |
(k[Nb * i + 2] << 8) | (k[Nb * i + 3]);
}
for (; i < (Nb * (Nr + 1)); ++i) {
t = s->words[i - 1];
if ((i % Nk) == 0) {
t = subword(rotword(t)) ^ rconst[i / Nk];
}
s->words[i] = s->words[i - Nk] ^ t;
}
return TC_CRYPTO_SUCCESS;
}
static inline void add_round_key(uint8_t *s, const unsigned int *k)
{
s[0] ^= (uint8_t)(k[0] >> 24); s[1] ^= (uint8_t)(k[0] >> 16);
s[2] ^= (uint8_t)(k[0] >> 8); s[3] ^= (uint8_t)(k[0]);
s[4] ^= (uint8_t)(k[1] >> 24); s[5] ^= (uint8_t)(k[1] >> 16);
s[6] ^= (uint8_t)(k[1] >> 8); s[7] ^= (uint8_t)(k[1]);
s[8] ^= (uint8_t)(k[2] >> 24); s[9] ^= (uint8_t)(k[2] >> 16);
s[10] ^= (uint8_t)(k[2] >> 8); s[11] ^= (uint8_t)(k[2]);
s[12] ^= (uint8_t)(k[3] >> 24); s[13] ^= (uint8_t)(k[3] >> 16);
s[14] ^= (uint8_t)(k[3] >> 8); s[15] ^= (uint8_t)(k[3]);
}
static inline void sub_bytes(uint8_t *s)
{
unsigned int i;
for (i = 0; i < (Nb * Nk); ++i) {
s[i] = sbox[s[i]];
}
}
#define triple(a)(_double_byte(a)^(a))
static inline void mult_row_column(uint8_t *out, const uint8_t *in)
{
out[0] = _double_byte(in[0]) ^ triple(in[1]) ^ in[2] ^ in[3];
out[1] = in[0] ^ _double_byte(in[1]) ^ triple(in[2]) ^ in[3];
out[2] = in[0] ^ in[1] ^ _double_byte(in[2]) ^ triple(in[3]);
out[3] = triple(in[0]) ^ in[1] ^ in[2] ^ _double_byte(in[3]);
}
static inline void mix_columns(uint8_t *s)
{
uint8_t t[Nb * Nk];
mult_row_column(t, s);
mult_row_column(&t[Nb], s + Nb);
mult_row_column(&t[2 * Nb], s + (2 * Nb));
mult_row_column(&t[3 * Nb], s + (3 * Nb));
(void) _copy(s, sizeof(t), t, sizeof(t));
}
/*
* This shift_rows also implements the matrix flip required for mix_columns, but
* performs it here to reduce the number of memory operations.
*/
static inline void shift_rows(uint8_t *s)
{
uint8_t t[Nb * Nk];
t[0] = s[0]; t[1] = s[5]; t[2] = s[10]; t[3] = s[15];
t[4] = s[4]; t[5] = s[9]; t[6] = s[14]; t[7] = s[3];
t[8] = s[8]; t[9] = s[13]; t[10] = s[2]; t[11] = s[7];
t[12] = s[12]; t[13] = s[1]; t[14] = s[6]; t[15] = s[11];
(void) _copy(s, sizeof(t), t, sizeof(t));
}
int tc_aes_encrypt(uint8_t *out, const uint8_t *in, const TCAesKeySched_t s)
{
uint8_t state[Nk * Nb];
unsigned int i;
if (out == (uint8_t *) 0) {
return TC_CRYPTO_FAIL;
} else if (in == (const uint8_t *) 0) {
return TC_CRYPTO_FAIL;
} else if (s == (TCAesKeySched_t) 0) {
return TC_CRYPTO_FAIL;
}
(void)_copy(state, sizeof(state), in, sizeof(state));
add_round_key(state, s->words);
for (i = 0; i < (Nr - 1); ++i) {
sub_bytes(state);
shift_rows(state);
mix_columns(state);
add_round_key(state, s->words + Nb * (i + 1));
}
sub_bytes(state);
shift_rows(state);
add_round_key(state, s->words + Nb * (i + 1));
(void)_copy(out, sizeof(state), state, sizeof(state));
/* zeroing out the state buffer */
_set(state, TC_ZERO_BYTE, sizeof(state));
return TC_CRYPTO_SUCCESS;
}
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.