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/***
* Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com>
* Distributed under the MIT Software License.
* See accompanying file LICENSE.txt or copy at
* https://opensource.org/licenses/MIT
***/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include "sha1.h"
int main(int argc, char** argv)
{
FILE* fd;
unsigned char hash2[20];
char buffer[65536];
size_t size;
SHA1_CTX ctx2;
int i,j;
if (argc < 2)
{
printf("Usage: %s <file>\n", basename(argv[0]));
return 1;
}
for (i=1; i < argc; ++i)
{
SHA1DCInit(&ctx2);
/* if the program name includes the word 'partial' then also test for reduced-round SHA-1 collisions */
if (NULL != strstr(argv[0], "partial"))
{
SHA1DCSetDetectReducedRoundCollision(&ctx2, 1);
}
fd = fopen(argv[i], "rb");
if (fd == NULL)
{
printf("cannot open file: %s\n", argv[i]);
return 1;
}
while (1)
{
size=fread(buffer,1,65536,fd);
SHA1DCUpdate(&ctx2, buffer, (unsigned)(size));
if (size != 65536)
break;
}
if (ferror(fd))
{
printf("error while reading file: %s\n", argv[i]);
return 1;
}
if (!feof(fd))
{
printf("not end of file?: %s\n",argv[i]);
return 1;
}
SHA1DCFinal(hash2,&ctx2);
for (j = 0; j < 20; ++j)
{
sprintf(buffer+(j*2), "%02x", hash2[j]);
}
buffer[20*2] = 0;
if (ctx2.found_collision)
{
printf("%s *coll* %s\n", buffer, argv[i]);
}
else
{
printf("%s %s\n", buffer, argv[i]);
}
fclose(fd);
}
return 0;
}
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