sbase/sha256sum.c

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2013-07-19 09:29:43 -04:00
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "util.h"
#include "crypt.h"
#include "sha256.h"
struct sha256 s;
struct crypt_ops sha256_ops = {
sha256_init,
sha256_update,
sha256_sum,
&s,
};
static void
usage(void)
{
eprintf("usage: %s [file...]\n", argv0);
}
int
main(int argc, char *argv[])
{
FILE *fp;
uint8_t md[SHA256_DIGEST_LENGTH];
ARGBEGIN {
default:
usage();
} ARGEND;
if (argc == 0) {
cryptsum(&sha256_ops, stdin, "<stdin>", md);
mdprint(md, "<stdin>", sizeof(md));
} else {
for (; argc > 0; argc--) {
if ((fp = fopen(*argv, "r")) == NULL)
eprintf("fopen %s:", *argv);
cryptsum(&sha256_ops, fp, *argv, md);
mdprint(md, *argv, sizeof(md));
fclose(fp);
argv++;
}
}
return 0;
}