FFmpeg
sha.c
Go to the documentation of this file.
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 <stdio.h>
20 
21 #include "libavutil/mem.h"
22 #include "libavutil/sha.h"
23 
24 int main(void)
25 {
26  int i, j, k;
27  struct AVSHA *ctx;
28  unsigned char digest[32];
29  static const int lengths[3] = { 160, 224, 256 };
30 
31  ctx = av_sha_alloc();
32  if (!ctx)
33  return 1;
34 
35  for (j = 0; j < 3; j++) {
36  printf("Testing SHA-%d\n", lengths[j]);
37  for (k = 0; k < 3; k++) {
38  av_sha_init(ctx, lengths[j]);
39  if (k == 0)
40  av_sha_update(ctx, "abc", 3);
41  else if (k == 1)
42  av_sha_update(ctx, "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", 56);
43  else
44  for (i = 0; i < 1000*1000; i++)
45  av_sha_update(ctx, "a", 1);
46  av_sha_final(ctx, digest);
47  for (i = 0; i < lengths[j] >> 3; i++)
48  printf("%02X", digest[i]);
49  putchar('\n');
50  }
51  switch (j) {
52  case 0:
53  //test vectors (from FIPS PUB 180-1)
54  printf("A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D\n"
55  "84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1\n"
56  "34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F\n");
57  break;
58  case 1:
59  //test vectors (from FIPS PUB 180-2 Appendix A)
60  printf("23097d22 3405d822 8642a477 bda255b3 2aadbce4 bda0b3f7 e36c9da7\n"
61  "75388b16 512776cc 5dba5da1 fd890150 b0c6455c b4f58b19 52522525\n"
62  "20794655 980c91d8 bbb4c1ea 97618a4b f03f4258 1948b2ee 4ee7ad67\n");
63  break;
64  case 2:
65  //test vectors (from FIPS PUB 180-2)
66  printf("ba7816bf 8f01cfea 414140de 5dae2223 b00361a3 96177a9c b410ff61 f20015ad\n"
67  "248d6a61 d20638b8 e5c02693 0c3e6039 a33ce459 64ff2167 f6ecedd4 19db06c1\n"
68  "cdc76e5c 9914fb92 81a1c7e2 84d73e67 f1809a48 a497200e 046d39cc c7112cd0\n");
69  break;
70  }
71  }
72  av_free(ctx);
73 
74  return 0;
75 }
av_sha_init
av_cold int av_sha_init(AVSHA *ctx, int bits)
Initialize SHA-1 or SHA-2 hashing.
Definition: sha.c:273
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_sha_final
void av_sha_final(AVSHA *ctx, uint8_t *digest)
Finish hashing and output digest value.
Definition: sha.c:346
sha.h
av_sha_update
void av_sha_update(struct AVSHA *ctx, const uint8_t *data, size_t len)
Update hash value.
Definition: sha.c:314
printf
printf("static const uint8_t my_array[100] = {\n")
av_sha_alloc
struct AVSHA * av_sha_alloc(void)
Allocate an AVSHA context.
Definition: sha.c:45
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVSHA
hash context
Definition: sha.c:34
mem.h
main
int main(void)
Definition: sha.c:24
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34