cryptpass.c

/*
 * Copyright (c) 2010 Joyent Inc., All rights reserved.
 *
 * Summary:
 *
 *  Takes plain-text password as cmdline arg and outputs a crypt() version.
 *
 */

#include <crypt.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void usage()
{
    printf("Usage: cryptpass <password>\n");
    exit(1);
}

int main(int argc, char *argv[])
{
    char *salt, *enc;

    if ((argc != 2) || (strlen(argv[1]) < 1)) {
        usage();
    }

    errno=0;
    salt=crypt_gensalt(NULL, NULL);
    if (salt == NULL) {
        printf("FATAL: crypt_gensalt() errno=%d\n", errno);
        exit(1);
    }

    enc = crypt(argv[1], salt);
    if (enc == NULL) {
        printf("FATAL: crypt() errno=%d\n", errno);
        free(salt);
        exit(1);
    }

    printf("%s\n", enc);

    free(salt);
    exit(0);
}