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
|
/* COMP128 version 2 and 3 implementation
*
* This code is a C conversion of the original code from
* http://www.hackingprojects.net/
*
*/
/* (C) 2013 by Kévin Redon <kevredon@mail.tsaitgaist.info>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <stdint.h>
#include <string.h>
static const uint8_t table0[256] = {
197, 235, 60, 151, 98, 96, 3, 100, 248, 118, 42, 117, 172, 211, 181, 203, 61,
126, 156, 87, 149, 224, 55, 132, 186, 63, 238, 255, 85, 83, 152, 33, 160,
184, 210, 219, 159, 11, 180, 194, 130, 212, 147, 5, 215, 92, 27, 46, 113,
187, 52, 25, 185, 79, 221, 48, 70, 31, 101, 15, 195, 201, 50, 222, 137,
233, 229, 106, 122, 183, 178, 177, 144, 207, 234, 182, 37, 254, 227, 231, 54,
209, 133, 65, 202, 69, 237, 220, 189, 146, 120, 68, 21, 125, 38, 30, 2,
155, 53, 196, 174, 176, 51, 246, 167, 76, 110, 20, 82, 121, 103, 112, 56,
173, 49, 217, 252, 0, 114, 228, 123, 12, 93, 161, 253, 232, 240, 175, 67,
128, 22, 158, 89, 18, 77, 109, 190, 17, 62, 4, 153, 163, 59, 145, 138,
7, 74, 205, 10, 162, 80, 45, 104, 111, 150, 214, 154, 28, 191, 169, 213,
88, 193, 198, 200, 245, 39, 164, 124, 84, 78, 1, 188, 170, 23, 86, 226,
141, 32, 6, 131, 127, 199, 40, 135, 16, 57, 71, 91, 225, 168, 242, 206,
97, 166, 44, 14, 90, 236, 239, 230, 244, 223, 108, 102, 119, 148, 251, 29,
216, 8, 9, 249, 208, 24, 105, 94, 34, 64, 95, 115, 72, 134, 204, 43,
247, 243, 218, 47, 58, 73, 107, 241, 179, 116, 66, 36, 143, 81, 250, 139,
19, 13, 142, 140, 129, 192, 99, 171, 157, 136, 41, 75, 35, 165, 26
}, table1[256] = {
170, 42, 95, 141, 109, 30, 71, 89, 26, 147, 231, 205, 239, 212, 124, 129, 216,
79, 15, 185, 153, 14, 251, 162, 0, 241, 172, 197, 43, 10, 194, 235, 6,
20, 72, 45, 143, 104, 161, 119, 41, 136, 38, 189, 135, 25, 93, 18, 224,
171, 252, 195, 63, 19, 58, 165, 23, 55, 133, 254, 214, 144, 220, 178, 156,
52, 110, 225, 97, 183, 140, 39, 53, 88, 219, 167, 16, 198, 62, 222, 76,
139, 175, 94, 51, 134, 115, 22, 67, 1, 249, 217, 3, 5, 232, 138, 31,
56, 116, 163, 70, 128, 234, 132, 229, 184, 244, 13, 34, 73, 233, 154, 179,
131, 215, 236, 142, 223, 27, 57, 246, 108, 211, 8, 253, 85, 66, 245, 193,
78, 190, 4, 17, 7, 150, 127, 152, 213, 37, 186, 2, 243, 46, 169, 68,
101, 60, 174, 208, 158, 176, 69, 238, 191, 90, 83, 166, 125, 77, 59, 21,
92, 49, 151, 168, 99, 9, 50, 146, 113, 117, 228, 65, 230, 40, 82, 54,
237, 227, 102, 28, 36, 107, 24, 44, 126, 206, 201, 61, 114, 164, 207, 181,
29, 91, 64, 221, 255, 48, 155, 192, 111, 180, 210, 182, 247, 203, 148, 209,
98, 173, 11, 75, 123, 250, 118, 32, 47, 240, 202, 74, 177, 100, 80, 196,
33, 248, 86, 157, 137, 120, 130, 84, 204, 122, 81, 242, 188, 200, 149, 226,
218, 160, 187, 106, 35, 87, 105, 96, 145, 199, 159, 12, 121, 103, 112
};
static void
_comp128v23_internal(uint8_t *output, const uint8_t *kxor, const uint8_t *rand)
{
uint8_t temp[16];
uint8_t km_rm[32];
uint8_t i,j,k,z;
memset(temp, 0, sizeof(temp));
memcpy(km_rm, rand, 16);
memcpy(km_rm + 16, kxor, 16);
for (i=0; i<5; i++) {
for (z=0; z<16; z++) {
temp[z] = table0[table1[km_rm[16+z]]^km_rm[z]];
}
j=0;
while ((1<<i)>j) {
k = 0;
while ((1<<(4-i))>k) {
km_rm[((2*k+1)<<i)+j] = table0[table1[temp[(k<<i)+j]]^(km_rm[(k<<i)+16+j])];
km_rm[(k<<(i+1))+j] = temp[(k<<i)+j];
k++;
}
j++;
}
}
memset(output,0,16);
for (i=0; i<16; i++) {
for (j=0; j<8; j++) {
output[i] ^= (((km_rm[(19*(j+8*i)+19)%256/8]>>(3*j+3)%8)&1)<< j);
}
}
}
int
comp128v3(const uint8_t *ki, const uint8_t *rand, uint8_t *sres, uint8_t *kc)
{
uint8_t k_mix[16];
uint8_t rand_mix[16];
uint8_t katyvasz[16];
uint8_t output[16];
uint8_t i;
memset(k_mix, 0, sizeof(k_mix));
memset(rand_mix, 0, sizeof(rand_mix));
memset(katyvasz, 0, sizeof(katyvasz));
memset(output, 0, sizeof(output));
for (i=0; i<8; i++) {
k_mix[i] = ki[15 - i];
k_mix[15 - i] = ki[i];
}
for (i=0; i<8; i++) {
rand_mix[i] = rand[15 - i];
rand_mix[15 - i] = rand[i];
}
for (i=0; i<16; i++) {
katyvasz[i] = k_mix[i]^rand_mix[i];
}
for (i=0; i<8; i++) {
_comp128v23_internal(rand_mix,katyvasz,rand_mix);
}
for (i=0; i<16; i++) {
output[i] = rand_mix[15-i];
}
memmove(output + 4, output + 8, 8); /* ignore bytes 4..7 */
/* the algorithm uses 16 bytes until this point, but only 12 bytes are effective
* also 12 bytes coming out from the SIM card */
memcpy(sres, output, 4);
memcpy(kc, output + 4, 8);
return 0;
}
int
comp128v2(const uint8_t *ki, const uint8_t *rand, uint8_t *sres, uint8_t *kc)
{
int r = comp128v3(ki, rand, sres, kc);
kc[7] = 0; /* 10 last bits of Kc forced to 0 */
kc[6] &= 0xfc;
return r;
}
|
