int hash_stream(gost_hash_ctx * ctx, int fd, char *sum);
int get_line(FILE *f, char *hash, char *filename, int verbose);
-void help()
+void help(const char *progname)
{
fprintf(stderr, "Calculates GOST R 34.11-2012 hash function\n\n");
- fprintf(stderr, "gostsum12 [-bvl] [-c [file]]| [files]|-x\n"
+ fprintf(stderr, "%s [-bvl] [-c [file]]| [files]|-x\n"
"\t-c check message digests (default is generate)\n"
"\t-v verbose, print file names when checking\n"
"\t-b read files in binary mode\n"
"\t-l use 512 bit hash (default 256 bit)\n"
"\t-x read filenames from stdin rather than from arguments \n"
"The input for -c should be the list of message digests and file names\n"
- "that is printed on stdout by this program when it generates digests.\n");
+ "that is printed on stdout by this program when it generates"
+ "digests.\n", progname);
exit(3);
}
break;
default:
fprintf(stderr, "invalid option %c", optopt);
- help();
+ help(argv[0]);
}
}
if (check_file) {
int hash_stream(gost_hash_ctx * ctx, int fd, char *sum)
{
unsigned char buffer[BUF_SIZE];
- unsigned char reverted_buffer[BUF_SIZE];
ssize_t bytes;
- int i, j, k;
+ size_t i;
+
start_hash12(ctx);
while ((bytes = read(fd, buffer, BUF_SIZE)) > 0) {
- hash12_block(ctx, reverted_buffer, bytes);
+ hash12_block(ctx, buffer, bytes);
}
if (bytes < 0) {
return 0;
}
finish_hash12(ctx, buffer);
for (i = 0; i < (hashsize / 8); i++) {
- sprintf(sum + 2 * i, "%02x", buffer[i]);
+ sprintf(sum + 2 * i, "%02x", buffer[hashsize/8-1-i]);
}
return 1;
}