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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/avstring.h"
  25. #include "libavutil/error.h"
  26. #include "libavutil/hash.h"
  27. #include "libavutil/mem.h"
  28.  
  29. #include <errno.h>
  30. #include <fcntl.h>
  31. #include <stdio.h>
  32. #include <sys/stat.h>
  33.  
  34. #if HAVE_IO_H
  35. #include <io.h>
  36. #endif
  37. #if HAVE_UNISTD_H
  38. #include <unistd.h>
  39. #endif
  40.  
  41. #define SIZE 65536
  42.  
  43. static struct AVHashContext *hash;
  44. static int out_b64;
  45.  
  46. static void usage(void)
  47. {
  48.     int i = 0;
  49.     const char *name;
  50.  
  51.     printf("usage: ffhash [b64:]algorithm [input]...\n");
  52.     printf("Supported hash algorithms:");
  53.     do {
  54.         name = av_hash_names(i);
  55.         if (name)
  56.             printf(" %s", name);
  57.         i++;
  58.     } while(name);
  59.     printf("\n");
  60. }
  61.  
  62. static void finish(void)
  63. {
  64.     char res[2 * AV_HASH_MAX_SIZE + 4];
  65.  
  66.     printf("%s=", av_hash_get_name(hash));
  67.     if (out_b64) {
  68.         av_hash_final_b64(hash, res, sizeof(res));
  69.         printf("b64:%s", res);
  70.     } else {
  71.         av_hash_final_hex(hash, res, sizeof(res));
  72.         printf("0x%s", res);
  73.     }
  74. }
  75.  
  76. static int check(char *file)
  77. {
  78.     uint8_t buffer[SIZE];
  79.     int fd, flags = O_RDONLY;
  80.     int ret = 0;
  81.  
  82. #ifdef O_BINARY
  83.     flags |= O_BINARY;
  84. #endif
  85.     if (file) fd = open(file, flags);
  86.     else      fd = 0;
  87.     if (fd == -1) {
  88.         printf("%s=OPEN-FAILED: %s:", av_hash_get_name(hash), strerror(errno));
  89.         ret = 1;
  90.         goto end;
  91.     }
  92.  
  93.     av_hash_init(hash);
  94.     for (;;) {
  95.         int size = read(fd, buffer, SIZE);
  96.         if (size < 0) {
  97.             int err = errno;
  98.             close(fd);
  99.             finish();
  100.             printf("+READ-FAILED: %s", strerror(err));
  101.             ret = 2;
  102.             goto end;
  103.         } else if(!size)
  104.             break;
  105.         av_hash_update(hash, buffer, size);
  106.     }
  107.     close(fd);
  108.  
  109.     finish();
  110. end:
  111.     if (file)
  112.         printf(" *%s", file);
  113.     printf("\n");
  114.  
  115.     return ret;
  116. }
  117.  
  118. int main(int argc, char **argv)
  119. {
  120.     int i;
  121.     int ret = 0;
  122.     const char *hash_name;
  123.  
  124.     if (argc == 1) {
  125.         usage();
  126.         return 0;
  127.     }
  128.  
  129.     hash_name = argv[1];
  130.     out_b64 = av_strstart(hash_name, "b64:", &hash_name);
  131.     if ((ret = av_hash_alloc(&hash, hash_name)) < 0) {
  132.         switch(ret) {
  133.         case AVERROR(EINVAL):
  134.             printf("Invalid hash type: %s\n", hash_name);
  135.             break;
  136.         case AVERROR(ENOMEM):
  137.             printf("%s\n", strerror(errno));
  138.             break;
  139.         }
  140.         return 1;
  141.     }
  142.  
  143.     for (i = 2; i < argc; i++)
  144.         ret |= check(argv[i]);
  145.  
  146.     if (argc < 3)
  147.         ret |= check(NULL);
  148.  
  149.     av_hash_freep(&hash);
  150.  
  151.     return ret;
  152. }
  153.