micro-utils/src/cryptpw.c

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

static char *gen_salt(void) {
	srand(getpid());

	static char salt[15];
	char abc[] = "asdfghjklzxcvbnmqwertyuiop1234567890";

	size_t i = 0;
	for (; i < sizeof(salt); i++)
		salt[i] = abc[rand() % sizeof(abc)];

	salt[i] = '\0';
	return salt;
}

int main(int argc, char **argv) {
	if (argc < 2) {
		puts("cryptpw: missing operand\ncryptpw [password] [own salt]");
		return 0;
	}

	char *salt_ptr = gen_salt();
	if (argc > 2)
		salt_ptr = argv[2];

	char *cpass = crypt(argv[1], salt_ptr);
	if (cpass == NULL)
		return 1;

	puts(cpass);
	return 0;
}