-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathaes_simple.cpp
222 lines (186 loc) · 6.85 KB
/
aes_simple.cpp
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
209
210
211
212
213
214
215
216
217
218
219
220
221
#include <stdio.h>
#include <stdint.h>
#include <iostream>
#include <vector>
using namespace std;
/* AES Constants */
// forward sbox
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
};
const uint8_t rCon[12] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36,
};
uint8_t wbyte(uint32_t w, int pos) {
return (w >> (pos * 8)) & 0xff;
}
uint8_t xtime(uint8_t a) {
uint8_t mask = 0x80, m = 0x1b;
uint8_t high_bit = a & mask;
a = a << 1;
if (high_bit) {
a = a ^ m;
}
return a;
}
uint32_t word(uint8_t a0, uint8_t a1, uint8_t a2, uint8_t a3) {
return a0 | (uint32_t)a1 << 8 | (uint32_t)a2 << 16 | (uint32_t)a3 << 24;
}
// **************** AES functions ****************
uint32_t subWord(uint32_t w) {
return word(SBOX[wbyte(w, 0)], SBOX[wbyte(w, 1)], SBOX[wbyte(w, 2)], SBOX[wbyte(w, 3)]);
}
void subBytes(vector<uint32_t> &s,unsigned & numBlocks) {
for (unsigned int i = 0 ; i < numBlocks * 4 ; i++)
{
s[i] = subWord(s[i]);
}
}
void shiftRows(vector<uint32_t> &s,unsigned &numBlocks) {
uint32_t s0;
uint32_t s1;
uint32_t s2;
uint32_t s3;
for (unsigned int k = 0 ; k < numBlocks; k++)
{
s0 = word(wbyte(s[4*k+0],0),wbyte(s[4*k+1],1),wbyte(s[4*k+2],2),wbyte(s[4*k+3],3));
s1 = word(wbyte(s[4*k+1],0),wbyte(s[4*k+2],1),wbyte(s[4*k+3],2),wbyte(s[4*k+0],3));
s2 = word(wbyte(s[4*k+2],0),wbyte(s[4*k+3],1),wbyte(s[4*k+0],2),wbyte(s[4*k+1],3));
s3 = word(wbyte(s[4*k+3],0),wbyte(s[4*k+0],1),wbyte(s[4*k+1],2),wbyte(s[4*k+2],3));
s[4*k+0] = s0;
s[4*k+1] = s1;
s[4*k+2] = s2;
s[4*k+3] = s3;
}
}
// not mandatory - mix a single column
uint32_t mixColumn(uint32_t c) {
return 0; /* ??? */
}
void mixColumns(vector<uint32_t> &s,unsigned & numBlocks) {
vector<uint32_t> a;
uint8_t word0,word1,word2,word3;
for (unsigned int k = 0 ; k < numBlocks ; k++)
{
for(unsigned int i = 0 ; i < 4 ; i++)
{
a.push_back(word(wbyte(s[4*k+i],0),wbyte(s[4*k+i],1),wbyte(s[4*k+i],2),wbyte(s[4*k+i],3)));
word0 = (xtime((wbyte(a[4*k+i],0))) ^ (xtime((wbyte(a[4*k+i],1))) ^ (wbyte(a[4*k+i],1))) ^ (wbyte(a[4*k+i],2)) ^ (wbyte(a[4*k+i],3)));
word1 = (xtime((wbyte(a[4*k+i],1))) ^ (xtime((wbyte(a[4*k+i],2))) ^ (wbyte(a[4*k+i],2))) ^ (wbyte(a[4*k+i],0)) ^ (wbyte(a[4*k+i],3)));
word2 = (xtime((wbyte(a[4*k+i],2))) ^ (xtime((wbyte(a[4*k+i],3))) ^ (wbyte(a[4*k+i],3))) ^ (wbyte(a[4*k+i],0)) ^ (wbyte(a[4*k+i],1)));
word3 = (xtime((wbyte(a[4*k+i],3))) ^ (xtime((wbyte(a[4*k+i],0))) ^ (wbyte(a[4*k+i],0))) ^ (wbyte(a[4*k+i],1)) ^ (wbyte(a[4*k+i],2)));
s[4*k+i] = word(word0,word1,word2,word3);
}
}
}
/*
* Key expansion from 128bits (4*32b)
* to 11 round keys (11*4*32b)
* each round key is 4*32b
*/
void expandKey(vector<uint8_t> & k, vector<uint32_t> & ek) {
unsigned int keyLength = 4;
uint32_t tmp;
for (unsigned int i = 0 ; i < 44 ; i++)
{
if (i <= 3)
{
for (unsigned int ki = 1; ki <= 4 ; ki++ )
{
ek.push_back(word(k[4*ki - 4],k[4*ki - 3],k[4*ki - 2],k[4*ki - 1]));
i++;
}
}
if (i % keyLength == 0)
{
tmp = word(wbyte(ek[i-1],1),wbyte(ek[i-1],2),wbyte(ek[i-1],3),wbyte(ek[i-1],0));
tmp = subWord(tmp);
tmp ^= ek[i-keyLength];
tmp ^= rCon[i/keyLength];
ek.push_back(tmp);
}
if (i % keyLength != 0)
{
tmp = ek[i-1] ^ ek[i-keyLength];
ek.push_back(tmp);
}
}
}
/* Adding expanded round key (prepared before) */
void addRoundKey(vector<uint32_t> &s, vector<uint32_t> & ek, short round,unsigned & numBlocks) {
for (unsigned int k = 0 ; k < numBlocks ;k++ )
{
for (unsigned int i = 0 ; i < 4 ;i++)
s[4*k+i] = word((wbyte(s[4*k+i],0) ^ wbyte(ek[4*round + (i)],0)),(wbyte(s[4*k+i],1) ^ wbyte(ek[4*round + (i)],1)),(wbyte(s[4*k+i],2) ^ wbyte(ek[4*round + (i)],2)),(wbyte(s[4*k+i],3) ^ wbyte(ek[4*round + (i)],3)));
}
}
void aes(vector<uint32_t> in, vector<uint8_t> &out, vector<uint32_t> skey, unsigned numBlocks)
{
addRoundKey(in, skey, 0,numBlocks);
for (unsigned int i = 1 ; i < 10 ; i++)
{
subBytes(in,numBlocks);
shiftRows(in,numBlocks);
mixColumns(in,numBlocks);
addRoundKey(in,skey,i,numBlocks);
}
subBytes(in,numBlocks);
shiftRows(in,numBlocks);
addRoundKey(in,skey,10,numBlocks);
}
//****************************
// MAIN function: AES testing
//****************************
int main(int argc, char* argv[])
{
int test_failed = 0;
unsigned int count = argv[1] == nullptr ? 1 : atoi(argv[1]);
vector <uint8_t> key { 0xde, 0xad, 0xbe, 0xef, 0x20, 0x74, 0x6f, 0x70, 0x20, 0x73, 0x65, 0x63, 0x72, 0x65, 0x74, 0x21};
vector <uint8_t> out ;
vector <uint8_t> res { 0x08 ,0x2b ,0xca ,0x4a ,0xd7 ,0x57 ,0xb2 ,0xe7 ,0x7c ,0x6f ,0xaa ,0x14 ,0x79 ,0x41 ,0x7f ,0xd0,
0xbe ,0x21 ,0xf5 ,0xfc ,0x74 ,0x8f ,0xfc ,0xf4 ,0x1b ,0x46 ,0x0a ,0x07 ,0xe7 ,0xb6 ,0x76 ,0x85,
0x57 ,0x9c ,0x34 ,0xde ,0xad ,0x38 ,0x97 ,0x4d ,0x9c ,0xd2 ,0xe1 ,0x6a ,0x83 ,0xc1 ,0xf5 ,0x3c,
0xe9 ,0x68 ,0xd8 ,0x87 ,0x87 ,0x6d ,0xbc ,0x9c ,0xba ,0xad ,0xea ,0xb4 ,0x46 ,0xe2 ,0x89 ,0x5a };
vector <uint32_t> in { 0x488ceb25 ,0x85cb89ff ,0x8190c04f ,0xfced47cc,
0x14b21986 ,0xd49265fe ,0x9ceafc8b ,0x44328e9d,
0xf1e9d7d7 ,0x5660def7 ,0x0789e98d ,0x39163d3f,
0xd13c8001 ,0x738dd808 ,0xc879eaaf ,0xc683471e };
vector <uint32_t> expKey;
expandKey(key,expKey);
for (unsigned int i = 0 ; i < count ; i++)
{
aes(in, out, expKey, 4);
}
return test_failed;
}