crypt.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

#include "crypt.h"

/*
 * Main function
 */
int main (int argc, char **argv)
{
	/* The hash we will produce, hopefully */
	char *hash = NULL;

	/* Option character */
	int opt;

	/* Iterate through any options */
	while ((opt = getopt(argc, argv, "h")) != -1) {
		switch (opt) {
			case 'h':
				usage(stdout, EXIT_SUCCESS);
				break;
			case '?':
				usage(stderr, EXIT_FAILURE);
				break;
			default:
				abort();
		}
	}

	/* If we don't have three arguments left now, bail */
	if (argc != 3)
		usage(stderr, EXIT_FAILURE);

	/* All seems well, build the hash and print it */
	hash = crypt(argv[1], argv[2]);
	puts(hash);
	exit(EXIT_SUCCESS);
}

/*
 * Show usage to given stream, and exit with given code
 */
void usage(FILE *stream, int status) {
	fputs("USAGE: crypt [-h | KEY SALT]\n", stream);
	exit(status);
}