FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavutil/tests/des.c
Date: 2025-10-30 16:00:47
Exec Total Coverage
Lines: 40 48 83.3%
Functions: 3 3 100.0%
Branches: 21 28 75.0%
Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/mem_internal.h"
20 #include "libavutil/timer.h"
21
22 #include "libavutil/des.c"
23
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28
29 #include "libavutil/time.h"
30
31 4000 static uint64_t rand64(void)
32 {
33 4000 uint64_t r = rand();
34 4000 r = (r << 32) | rand();
35 4000 return r;
36 }
37
38 static const uint8_t test_key[] = { 0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0 };
39 static const DECLARE_ALIGNED(8, uint8_t, plain)[] = { 0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10 };
40 static const DECLARE_ALIGNED(8, uint8_t, crypt_ref)[] = { 0x4a, 0xb6, 0x5b, 0x3d, 0x4b, 0x06, 0x15, 0x18 };
41 static DECLARE_ALIGNED(8, uint8_t, tmp)[8];
42 static DECLARE_ALIGNED(8, uint8_t, large_buffer)[10002][8];
43 static const uint8_t cbc_key[] = {
44 0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
45 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01,
46 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23
47 };
48
49 4 static int run_test(int cbc, int decrypt)
50 {
51 AVDES d;
52
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 4 int delay = cbc && !decrypt ? 2 : 1;
53 uint64_t res;
54 4 AV_WB64(large_buffer[0], 0x4e6f772069732074ULL);
55 4 AV_WB64(large_buffer[1], 0x1234567890abcdefULL);
56 4 AV_WB64(tmp, 0x1234567890abcdefULL);
57 4 av_des_init(&d, cbc_key, 192, decrypt);
58
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 4 av_des_crypt(&d, large_buffer[delay], large_buffer[0], 10000, cbc ? tmp : NULL, decrypt);
59 4 res = AV_RB64(large_buffer[9999 + delay]);
60
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 4 if (cbc) {
61
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 2 if (decrypt)
62 1 return res == 0xc5cecf63ecec514cULL;
63 else
64 1 return res == 0xcb191f85d1ed8439ULL;
65 } else {
66
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 2 if (decrypt)
67 1 return res == 0x8325397644091a0aULL;
68 else
69 1 return res == 0xdd17e8b8b437d232ULL;
70 }
71 }
72
73 union word_byte {
74 uint64_t word;
75 uint8_t byte[8];
76 };
77
78 1 int main(void)
79 {
80 AVDES d;
81 int i;
82 union word_byte key[3], data, ct;
83 uint64_t roundkeys[16];
84 1 srand(av_gettime());
85 1 key[0].word = AV_RB64(test_key);
86 1 data.word = AV_RB64(plain);
87 1 gen_roundkeys(roundkeys, key[0].word);
88
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 1 if (des_encdec(data.word, roundkeys, 0) != AV_RB64(crypt_ref)) {
89 ✗ printf("Test 1 failed\n");
90 ✗ return 1;
91 }
92 1 av_des_init(&d, test_key, 64, 0);
93 1 av_des_crypt(&d, tmp, plain, 1, NULL, 0);
94
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 1 if (memcmp(tmp, crypt_ref, sizeof(crypt_ref))) {
95 ✗ printf("Public API decryption failed\n");
96 ✗ return 1;
97 }
98
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 1 if (!run_test(0, 0) || !run_test(0, 1) || !run_test(1, 0) || !run_test(1, 1)) {
99 ✗ printf("Partial Monte-Carlo test failed\n");
100 ✗ return 1;
101 }
102
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 1001 for (i = 0; i < 1000; i++) {
103 1000 key[0].word = rand64();
104 1000 key[1].word = rand64();
105 1000 key[2].word = rand64();
106 1000 data.word = rand64();
107 1000 av_des_init(&d, key[0].byte, 192, 0);
108 1000 av_des_crypt(&d, ct.byte, data.byte, 1, NULL, 0);
109 1000 av_des_init(&d, key[0].byte, 192, 1);
110 1000 av_des_crypt(&d, ct.byte, ct.byte, 1, NULL, 1);
111
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 1000 if (ct.word != data.word) {
112 ✗ printf("Test 2 failed\n");
113 ✗ return 1;
114 }
115 }
116 #ifdef GENTABLES
117 printf("static const uint32_t S_boxes_P_shuffle[8][64] = {\n");
118 for (i = 0; i < 8; i++) {
119 int j;
120 printf(" {");
121 for (j = 0; j < 64; j++) {
122 uint32_t v = S_boxes[i][j >> 1];
123 v = j & 1 ? v >> 4 : v & 0xf;
124 v <<= 28 - 4 * i;
125 v = shuffle(v, P_shuffle, sizeof(P_shuffle));
126 printf((j & 7) == 0 ? "\n " : " ");
127 printf("0x%08X,", v);
128 }
129 printf("\n },\n");
130 }
131 printf("};\n");
132 #endif
133 1 return 0;
134 }
135