ffmpeg / libavutil / des.c @ 25a03ba3
History | View | Annotate | Download (18.1 KB)
1 |
/*
|
---|---|
2 |
* DES encryption/decryption
|
3 |
* Copyright (c) 2007 Reimar Doeffinger
|
4 |
*
|
5 |
* This file is part of FFmpeg.
|
6 |
*
|
7 |
* FFmpeg is free software; you can redistribute it and/or
|
8 |
* modify it under the terms of the GNU Lesser General Public
|
9 |
* License as published by the Free Software Foundation; either
|
10 |
* version 2.1 of the License, or (at your option) any later version.
|
11 |
*
|
12 |
* FFmpeg is distributed in the hope that it will be useful,
|
13 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
15 |
* Lesser General Public License for more details.
|
16 |
*
|
17 |
* You should have received a copy of the GNU Lesser General Public
|
18 |
* License along with FFmpeg; if not, write to the Free Software
|
19 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
20 |
*/
|
21 |
#include <inttypes.h> |
22 |
#include "avutil.h" |
23 |
#include "common.h" |
24 |
#include "intreadwrite.h" |
25 |
#include "des.h" |
26 |
|
27 |
typedef struct AVDES AVDES; |
28 |
|
29 |
#define T(a, b, c, d, e, f, g, h) 64-a,64-b,64-c,64-d,64-e,64-f,64-g,64-h |
30 |
static const uint8_t IP_shuffle[] = { |
31 |
T(58, 50, 42, 34, 26, 18, 10, 2), |
32 |
T(60, 52, 44, 36, 28, 20, 12, 4), |
33 |
T(62, 54, 46, 38, 30, 22, 14, 6), |
34 |
T(64, 56, 48, 40, 32, 24, 16, 8), |
35 |
T(57, 49, 41, 33, 25, 17, 9, 1), |
36 |
T(59, 51, 43, 35, 27, 19, 11, 3), |
37 |
T(61, 53, 45, 37, 29, 21, 13, 5), |
38 |
T(63, 55, 47, 39, 31, 23, 15, 7) |
39 |
}; |
40 |
#undef T
|
41 |
|
42 |
#define T(a, b, c, d) 32-a,32-b,32-c,32-d |
43 |
static const uint8_t P_shuffle[] = { |
44 |
T(16, 7, 20, 21), |
45 |
T(29, 12, 28, 17), |
46 |
T( 1, 15, 23, 26), |
47 |
T( 5, 18, 31, 10), |
48 |
T( 2, 8, 24, 14), |
49 |
T(32, 27, 3, 9), |
50 |
T(19, 13, 30, 6), |
51 |
T(22, 11, 4, 25) |
52 |
}; |
53 |
#undef T
|
54 |
|
55 |
#define T(a, b, c, d, e, f, g) 64-a,64-b,64-c,64-d,64-e,64-f,64-g |
56 |
static const uint8_t PC1_shuffle[] = { |
57 |
T(57, 49, 41, 33, 25, 17, 9), |
58 |
T( 1, 58, 50, 42, 34, 26, 18), |
59 |
T(10, 2, 59, 51, 43, 35, 27), |
60 |
T(19, 11, 3, 60, 52, 44, 36), |
61 |
T(63, 55, 47, 39, 31, 23, 15), |
62 |
T( 7, 62, 54, 46, 38, 30, 22), |
63 |
T(14, 6, 61, 53, 45, 37, 29), |
64 |
T(21, 13, 5, 28, 20, 12, 4) |
65 |
}; |
66 |
#undef T
|
67 |
|
68 |
#define T(a, b, c, d, e, f) 56-a,56-b,56-c,56-d,56-e,56-f |
69 |
static const uint8_t PC2_shuffle[] = { |
70 |
T(14, 17, 11, 24, 1, 5), |
71 |
T( 3, 28, 15, 6, 21, 10), |
72 |
T(23, 19, 12, 4, 26, 8), |
73 |
T(16, 7, 27, 20, 13, 2), |
74 |
T(41, 52, 31, 37, 47, 55), |
75 |
T(30, 40, 51, 45, 33, 48), |
76 |
T(44, 49, 39, 56, 34, 53), |
77 |
T(46, 42, 50, 36, 29, 32) |
78 |
}; |
79 |
#undef T
|
80 |
|
81 |
#if CONFIG_SMALL
|
82 |
static const uint8_t S_boxes[8][32] = { |
83 |
{ |
84 |
0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87, |
85 |
0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b, 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0, |
86 |
}, { |
87 |
0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4, 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a, |
88 |
0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21, 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f, |
89 |
}, { |
90 |
0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5, 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18, |
91 |
0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70, 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7, |
92 |
}, { |
93 |
0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a, 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f, |
94 |
0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d, 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4, |
95 |
}, { |
96 |
0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16, 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69, |
97 |
0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8, 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e, |
98 |
}, { |
99 |
0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58, 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b, |
100 |
0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3, 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6, |
101 |
}, { |
102 |
0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad, 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61, |
103 |
0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e, 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2, |
104 |
}, { |
105 |
0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41, 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27, |
106 |
0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2, 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8, |
107 |
} |
108 |
}; |
109 |
#else
|
110 |
/**
|
111 |
* This table contains the results of applying both the S-box and P-shuffle.
|
112 |
* It can be regenerated by compiling this file with -DCONFIG_SMALL -DTEST -DGENTABLES
|
113 |
*/
|
114 |
static const uint32_t S_boxes_P_shuffle[8][64] = { |
115 |
{ |
116 |
0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000, |
117 |
0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002, |
118 |
0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202, |
119 |
0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000, |
120 |
0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200, |
121 |
0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202, |
122 |
0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200, |
123 |
0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002, |
124 |
}, |
125 |
{ |
126 |
0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010, |
127 |
0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010, |
128 |
0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000, |
129 |
0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010, |
130 |
0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000, |
131 |
0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000, |
132 |
0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010, |
133 |
0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000, |
134 |
}, |
135 |
{ |
136 |
0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100, |
137 |
0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104, |
138 |
0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104, |
139 |
0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000, |
140 |
0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000, |
141 |
0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004, |
142 |
0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004, |
143 |
0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100, |
144 |
}, |
145 |
{ |
146 |
0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000, |
147 |
0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000, |
148 |
0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040, |
149 |
0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040, |
150 |
0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000, |
151 |
0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040, |
152 |
0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040, |
153 |
0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040, |
154 |
}, |
155 |
{ |
156 |
0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000, |
157 |
0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000, |
158 |
0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080, |
159 |
0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080, |
160 |
0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080, |
161 |
0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000, |
162 |
0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000, |
163 |
0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080, |
164 |
}, |
165 |
{ |
166 |
0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000, |
167 |
0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008, |
168 |
0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008, |
169 |
0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000, |
170 |
0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008, |
171 |
0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000, |
172 |
0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008, |
173 |
0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008, |
174 |
}, |
175 |
{ |
176 |
0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400, |
177 |
0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401, |
178 |
0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001, |
179 |
0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400, |
180 |
0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001, |
181 |
0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400, |
182 |
0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401, |
183 |
0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001, |
184 |
}, |
185 |
{ |
186 |
0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000, |
187 |
0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020, |
188 |
0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800, |
189 |
0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000, |
190 |
0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820, |
191 |
0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820, |
192 |
0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000, |
193 |
0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800, |
194 |
}, |
195 |
}; |
196 |
#endif
|
197 |
|
198 |
static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len) { |
199 |
int i;
|
200 |
uint64_t res = 0;
|
201 |
for (i = 0; i < shuffle_len; i++) |
202 |
res += res + ((in >> *shuffle++) & 1);
|
203 |
return res;
|
204 |
} |
205 |
|
206 |
static uint64_t shuffle_inv(uint64_t in, const uint8_t *shuffle, int shuffle_len) { |
207 |
int i;
|
208 |
uint64_t res = 0;
|
209 |
shuffle += shuffle_len - 1;
|
210 |
for (i = 0; i < shuffle_len; i++) { |
211 |
res |= (in & 1) << *shuffle--;
|
212 |
in >>= 1;
|
213 |
} |
214 |
return res;
|
215 |
} |
216 |
|
217 |
static uint32_t f_func(uint32_t r, uint64_t k) {
|
218 |
int i;
|
219 |
uint32_t out = 0;
|
220 |
// rotate to get first part of E-shuffle in the lowest 6 bits
|
221 |
r = (r << 1) | (r >> 31); |
222 |
// apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits
|
223 |
for (i = 7; i >= 0; i--) { |
224 |
uint8_t tmp = (r ^ k) & 0x3f;
|
225 |
#if CONFIG_SMALL
|
226 |
uint8_t v = S_boxes[i][tmp >> 1];
|
227 |
if (tmp & 1) v >>= 4; |
228 |
out = (out >> 4) | (v << 28); |
229 |
#else
|
230 |
out |= S_boxes_P_shuffle[i][tmp]; |
231 |
#endif
|
232 |
// get next 6 bits of E-shuffle and round key k into the lowest bits
|
233 |
r = (r >> 4) | (r << 28); |
234 |
k >>= 6;
|
235 |
} |
236 |
#if CONFIG_SMALL
|
237 |
out = shuffle(out, P_shuffle, sizeof(P_shuffle));
|
238 |
#endif
|
239 |
return out;
|
240 |
} |
241 |
|
242 |
/**
|
243 |
* \brief rotate the two halves of the expanded 56 bit key each 1 bit left
|
244 |
*
|
245 |
* Note: the specification calls this "shift", so I kept it although
|
246 |
* it is confusing.
|
247 |
*/
|
248 |
static uint64_t key_shift_left(uint64_t CDn) {
|
249 |
uint64_t carries = (CDn >> 27) & 0x10000001; |
250 |
CDn <<= 1;
|
251 |
CDn &= ~0x10000001;
|
252 |
CDn |= carries; |
253 |
return CDn;
|
254 |
} |
255 |
|
256 |
static void gen_roundkeys(uint64_t K[16], uint64_t key) { |
257 |
int i;
|
258 |
// discard parity bits from key and shuffle it into C and D parts
|
259 |
uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle));
|
260 |
// generate round keys
|
261 |
for (i = 0; i < 16; i++) { |
262 |
CDn = key_shift_left(CDn); |
263 |
if (i > 1 && i != 8 && i != 15) |
264 |
CDn = key_shift_left(CDn); |
265 |
K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle));
|
266 |
} |
267 |
} |
268 |
|
269 |
static uint64_t des_encdec(uint64_t in, uint64_t K[16], int decrypt) { |
270 |
int i;
|
271 |
// used to apply round keys in reverse order for decryption
|
272 |
decrypt = decrypt ? 15 : 0; |
273 |
// shuffle irrelevant to security but to ease hardware implementations
|
274 |
in = shuffle(in, IP_shuffle, sizeof(IP_shuffle));
|
275 |
for (i = 0; i < 16; i++) { |
276 |
uint32_t f_res; |
277 |
f_res = f_func(in, K[decrypt ^ i]); |
278 |
in = (in << 32) | (in >> 32); |
279 |
in ^= f_res; |
280 |
} |
281 |
in = (in << 32) | (in >> 32); |
282 |
// reverse shuffle used to ease hardware implementations
|
283 |
in = shuffle_inv(in, IP_shuffle, sizeof(IP_shuffle));
|
284 |
return in;
|
285 |
} |
286 |
|
287 |
#if LIBAVUTIL_VERSION_MAJOR < 50 |
288 |
uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt) {
|
289 |
uint64_t K[16];
|
290 |
gen_roundkeys(K, key); |
291 |
return des_encdec(in, K, decrypt);
|
292 |
} |
293 |
#endif
|
294 |
|
295 |
int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt) { |
296 |
if (key_bits != 64 && key_bits != 192) |
297 |
return -1; |
298 |
d->triple_des = key_bits > 64;
|
299 |
gen_roundkeys(d->round_keys[0], AV_RB64(key));
|
300 |
if (d->triple_des) {
|
301 |
gen_roundkeys(d->round_keys[1], AV_RB64(key + 8)); |
302 |
gen_roundkeys(d->round_keys[2], AV_RB64(key + 16)); |
303 |
} |
304 |
return 0; |
305 |
} |
306 |
|
307 |
void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) { |
308 |
uint64_t iv_val = iv ? be2me_64(*(uint64_t *)iv) : 0;
|
309 |
while (count-- > 0) { |
310 |
uint64_t dst_val; |
311 |
uint64_t src_val = src ? be2me_64(*(const uint64_t *)src) : 0; |
312 |
if (decrypt) {
|
313 |
uint64_t tmp = src_val; |
314 |
if (d->triple_des) {
|
315 |
src_val = des_encdec(src_val, d->round_keys[2], 1); |
316 |
src_val = des_encdec(src_val, d->round_keys[1], 0); |
317 |
} |
318 |
dst_val = des_encdec(src_val, d->round_keys[0], 1) ^ iv_val; |
319 |
iv_val = iv ? tmp : 0;
|
320 |
} else {
|
321 |
dst_val = des_encdec(src_val ^ iv_val, d->round_keys[0], 0); |
322 |
if (d->triple_des) {
|
323 |
dst_val = des_encdec(dst_val, d->round_keys[1], 1); |
324 |
dst_val = des_encdec(dst_val, d->round_keys[2], 0); |
325 |
} |
326 |
iv_val = iv ? dst_val : 0;
|
327 |
} |
328 |
*(uint64_t *)dst = be2me_64(dst_val); |
329 |
src += 8;
|
330 |
dst += 8;
|
331 |
} |
332 |
if (iv)
|
333 |
*(uint64_t *)iv = be2me_64(iv_val); |
334 |
} |
335 |
|
336 |
#ifdef TEST
|
337 |
#undef printf
|
338 |
#undef rand
|
339 |
#undef srand
|
340 |
#include <stdlib.h> |
341 |
#include <stdio.h> |
342 |
#include <sys/time.h> |
343 |
static uint64_t rand64(void) { |
344 |
uint64_t r = rand(); |
345 |
r = (r << 32) | rand();
|
346 |
return r;
|
347 |
} |
348 |
|
349 |
static const uint8_t test_key[] = {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0}; |
350 |
static const DECLARE_ALIGNED(8, uint8_t, plain[]) = {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10}; |
351 |
static const DECLARE_ALIGNED(8, uint8_t, crypt[]) = {0x4a, 0xb6, 0x5b, 0x3d, 0x4b, 0x06, 0x15, 0x18}; |
352 |
static DECLARE_ALIGNED(8, uint8_t, tmp[8]); |
353 |
static DECLARE_ALIGNED(8, uint8_t, large_buffer[10002][8]); |
354 |
static const uint8_t cbc_key[] = { |
355 |
0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, |
356 |
0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, |
357 |
0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23 |
358 |
}; |
359 |
|
360 |
int run_test(int cbc, int decrypt) { |
361 |
AVDES d; |
362 |
int delay = cbc && !decrypt ? 2 : 1; |
363 |
uint64_t res; |
364 |
AV_WB64(large_buffer[0], 0x4e6f772069732074ULL); |
365 |
AV_WB64(large_buffer[1], 0x1234567890abcdefULL); |
366 |
AV_WB64(tmp, 0x1234567890abcdefULL);
|
367 |
av_des_init(&d, cbc_key, 192, decrypt);
|
368 |
av_des_crypt(&d, large_buffer[delay], large_buffer[0], 10000, cbc ? tmp : NULL, decrypt); |
369 |
res = AV_RB64(large_buffer[9999 + delay]);
|
370 |
if (cbc) {
|
371 |
if (decrypt)
|
372 |
return res == 0xc5cecf63ecec514cULL; |
373 |
else
|
374 |
return res == 0xcb191f85d1ed8439ULL; |
375 |
} else {
|
376 |
if (decrypt)
|
377 |
return res == 0x8325397644091a0aULL; |
378 |
else
|
379 |
return res == 0xdd17e8b8b437d232ULL; |
380 |
} |
381 |
} |
382 |
|
383 |
int main(void) { |
384 |
AVDES d; |
385 |
int i;
|
386 |
#ifdef GENTABLES
|
387 |
int j;
|
388 |
#endif
|
389 |
struct timeval tv;
|
390 |
uint64_t key[3];
|
391 |
uint64_t data; |
392 |
uint64_t ct; |
393 |
gettimeofday(&tv, NULL);
|
394 |
srand(tv.tv_sec * 1000 * 1000 + tv.tv_usec); |
395 |
#if LIBAVUTIL_VERSION_MAJOR < 50 |
396 |
key[0] = AV_RB64(test_key);
|
397 |
data = AV_RB64(plain); |
398 |
if (ff_des_encdec(data, key[0], 0) != AV_RB64(crypt)) { |
399 |
printf("Test 1 failed\n");
|
400 |
return 1; |
401 |
} |
402 |
#endif
|
403 |
av_des_init(&d, test_key, 64, 0); |
404 |
av_des_crypt(&d, tmp, plain, 1, NULL, 0); |
405 |
if (memcmp(tmp, crypt, sizeof(crypt))) { |
406 |
printf("Public API decryption failed\n");
|
407 |
return 1; |
408 |
} |
409 |
if (!run_test(0, 0) || !run_test(0, 1) || !run_test(1, 0) || !run_test(1, 1)) { |
410 |
printf("Partial Monte-Carlo test failed\n");
|
411 |
return 1; |
412 |
} |
413 |
for (i = 0; i < 1000000; i++) { |
414 |
key[0] = rand64(); key[1] = rand64(); key[2] = rand64(); |
415 |
data = rand64(); |
416 |
av_des_init(&d, key, 192, 0); |
417 |
av_des_crypt(&d, &ct, &data, 1, NULL, 0); |
418 |
av_des_init(&d, key, 192, 1); |
419 |
av_des_crypt(&d, &ct, &ct, 1, NULL, 1); |
420 |
if (ct != data) {
|
421 |
printf("Test 2 failed\n");
|
422 |
return 1; |
423 |
} |
424 |
} |
425 |
#ifdef GENTABLES
|
426 |
printf("static const uint32_t S_boxes_P_shuffle[8][64] = {\n");
|
427 |
for (i = 0; i < 8; i++) { |
428 |
printf(" {");
|
429 |
for (j = 0; j < 64; j++) { |
430 |
uint32_t v = S_boxes[i][j >> 1];
|
431 |
v = j & 1 ? v >> 4 : v & 0xf; |
432 |
v <<= 28 - 4 * i; |
433 |
v = shuffle(v, P_shuffle, sizeof(P_shuffle));
|
434 |
printf((j & 7) == 0 ? "\n " : " "); |
435 |
printf("0x%08X,", v);
|
436 |
} |
437 |
printf("\n },\n");
|
438 |
} |
439 |
printf("};\n");
|
440 |
#endif
|
441 |
return 0; |
442 |
} |
443 |
#endif
|