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  1. /*
  2.  * Copyright (c) 2002 Fabrice Bellard
  3.  * Copyright (c) 2013 Michael Niedermayer
  4.  * Copyright (c) 2013 James Almer
  5.  *
  6.  * This file is part of FFmpeg.
  7.  *
  8.  * FFmpeg is free software; you can redistribute it and/or
  9.  * modify it under the terms of the GNU Lesser General Public
  10.  * License as published by the Free Software Foundation; either
  11.  * version 2.1 of the License, or (at your option) any later version.
  12.  *
  13.  * FFmpeg is distributed in the hope that it will be useful,
  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16.  * Lesser General Public License for more details.
  17.  *
  18.  * You should have received a copy of the GNU Lesser General Public
  19.  * License along with FFmpeg; if not, write to the Free Software
  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21.  */
  22.  
  23. #include "config.h"
  24. #include "libavutil/error.h"
  25. #include "libavutil/hash.h"
  26. #include "libavutil/mem.h"
  27.  
  28. #include <errno.h>
  29. #include <fcntl.h>
  30. #include <stdio.h>
  31. #include <sys/stat.h>
  32.  
  33. #if HAVE_IO_H
  34. #include <io.h>
  35. #endif
  36. #if HAVE_UNISTD_H
  37. #include <unistd.h>
  38. #endif
  39.  
  40. #define SIZE 65536
  41.  
  42. static struct AVHashContext *hash;
  43. static uint8_t *res;
  44.  
  45. static void usage(void)
  46. {
  47.     int i = 0;
  48.     const char *name;
  49.  
  50.     printf("usage: ffhash [algorithm] [input]...\n");
  51.     printf("Supported hash algorithms:");
  52.     do {
  53.         name = av_hash_names(i);
  54.         if (name)
  55.             printf(" %s", name);
  56.         i++;
  57.     } while(name);
  58.     printf("\n");
  59. }
  60.  
  61. static void finish(void)
  62. {
  63.     int i, len = av_hash_get_size(hash);
  64.  
  65.     printf("%s=0x", av_hash_get_name(hash));
  66.     av_hash_final(hash, res);
  67.     for (i = 0; i < len; i++)
  68.         printf("%02x", res[i]);
  69. }
  70.  
  71. static int check(char *file)
  72. {
  73.     uint8_t buffer[SIZE];
  74.     int fd, flags = O_RDONLY;
  75.     int ret = 0;
  76.  
  77. #ifdef O_BINARY
  78.     flags |= O_BINARY;
  79. #endif
  80.     if (file) fd = open(file, flags);
  81.     else      fd = 0;
  82.     if (fd == -1) {
  83.         printf("%s=OPEN-FAILED: %s:", av_hash_get_name(hash), strerror(errno));
  84.         ret = 1;
  85.         goto end;
  86.     }
  87.  
  88.     av_hash_init(hash);
  89.     for (;;) {
  90.         int size = read(fd, buffer, SIZE);
  91.         if (size < 0) {
  92.             close(fd);
  93.             finish();
  94.             printf("+READ-FAILED: %s", strerror(errno));
  95.             ret = 2;
  96.             goto end;
  97.         } else if(!size)
  98.             break;
  99.         av_hash_update(hash, buffer, size);
  100.     }
  101.     close(fd);
  102.  
  103.     finish();
  104. end:
  105.     if (file)
  106.         printf(" *%s", file);
  107.     printf("\n");
  108.  
  109.     return ret;
  110. }
  111.  
  112. int main(int argc, char **argv)
  113. {
  114.     int i;
  115.     int ret = 0;
  116.  
  117.     if (argc == 1) {
  118.         usage();
  119.         return 0;
  120.     }
  121.  
  122.     if ((ret = av_hash_alloc(&hash, argv[1])) < 0) {
  123.         switch(ret) {
  124.         case AVERROR(EINVAL):
  125.             printf("Invalid hash type: %s\n", argv[1]);
  126.             break;
  127.         case AVERROR(ENOMEM):
  128.             printf("%s\n", strerror(errno));
  129.             break;
  130.         }
  131.         return 1;
  132.     }
  133.     res = av_malloc(av_hash_get_size(hash));
  134.     if (!res) {
  135.         printf("%s\n", strerror(errno));
  136.         return 1;
  137.     }
  138.  
  139.     for (i = 2; i < argc; i++)
  140.         ret |= check(argv[i]);
  141.  
  142.     if (argc < 3)
  143.         ret |= check(NULL);
  144.  
  145.     av_hash_freep(&hash);
  146.     av_freep(&res);
  147.  
  148.     return ret;
  149. }
  150.