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/* dircproxy-crypt
* Copyright (C) 2002 Scott James Remnant <scott@netsplit.com>.
* All Rights Reserved.
*
* main.c
* - Encyrpt a password taken from stdin or the command line
*
* This is deliberately simple, it doesn't even malloc() anything (which,
* for something I wrote, is amazing).
* --
* @(#) $Id: main.c,v 1.3 2001/12/21 20:15:54 keybuk Exp $
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef HAVE_CONFIG_H
#include <config.h>
#else /* HAVE_CONFIG_H */
#define PACKAGE "dircproxy"
#define VERSION "-debug"
#endif /* HAVE_CONFIG_H */
#ifdef HAVE_CRYPT_H
#include <crypt.h>
#else /* HAVE_CRYPT_H */
#include <unistd.h>
#endif /* HAVE_CRYPT_H */
#include "getopt/getopt.h"
/* forward declarations */
static void _encrypt(const char *);
static void _saltchar(char *);
static int _print_usage(void);
static int _print_version(void);
static int _print_help(void);
/* This is so "ident" and "what" can query version etc - userful (not) */
const char *rcsid = "@(#) $Id: main.c,v 1.3 2001/12/21 20:15:54 keybuk Exp $";
/* The name of the program */
static char *progname;
/* Long options */
static struct option long_opts[] = {
{ "help", 0, NULL, 'h' },
{ "version", 0, NULL, 'v' },
{ 0, 0, 0, 0}
};
/* Options */
#define GETOPTIONS "hv"
/* The main func */
int main(int argc, char *argv[]) {
int optc, show_help, show_version, show_usage;
/* Get arguments */
progname = argv[0];
show_help = show_version = show_usage = 0;
while ((optc = getopt_long(argc, argv, GETOPTIONS, long_opts, NULL)) != -1) {
switch (optc) {
case 'h':
show_help = 1;
break;
case 'v':
show_version = 1;
break;
default:
show_usage = 1;
break;
}
}
if (show_usage) {
_print_usage();
return 1;
}
if (show_version) {
_print_version();
if (!show_help)
return 0;
}
if (show_help) {
_print_help();
return 0;
}
/* Randomize */
srand(time(0));
if (optind < argc) {
while (optind < argc) {
_encrypt(argv[optind]);
optind++;
}
} else {
char pass[80], *ret;
printf("Password: ");
ret = fgets(pass, sizeof(pass), stdin);
printf("\n");
if (ret) {
char *ptr;
ptr = pass + strlen(pass);
while ((ptr >= ret) && (*ptr <= 32)) *(ptr--) = 0;
_encrypt(pass);
}
}
return 0;
}
/* Encrypt a password */
static void _encrypt(const char *pass) {
char salt[3], *enc;
_saltchar(&(salt[0]));
_saltchar(&(salt[1]));
salt[2] = 0;
enc = crypt(pass, salt);
printf("%s = %s\n", pass, enc);
}
/* Pick a random salt character */
static void _saltchar(char *c) {
static char *chars = "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"01234567890";
int ran;
ran = (int)((double)(strlen(chars) - 1) * (rand() / (RAND_MAX + 1.0)));
*c = chars[ran];
}
/* Print the usage instructions to stderr */
static int _print_usage(void) {
fprintf(stderr, "%s: Try '%s --help' for more information.\n",
progname, progname);
return 0;
}
/* Print the version number to stderr */
static int _print_version(void) {
fprintf(stderr, "dircproxy-crypt (%s %s)\n", PACKAGE, VERSION);
return 0;
}
/* Print the help to stderr */
static int _print_help(void) {
fprintf(stderr, "dircproxy-crypt. Encyrpt passwords for %s.\n\n", PACKAGE);
fprintf(stderr, "Usage: %s [OPTION]... [PASSWORD]...\n\n", progname);
fprintf(stderr, "If a long option shows an argument as mandatory, then "
"it is mandatory\nfor the equivalent short option also. "
"Similarly for optional arguments.\n\n");
fprintf(stderr, " -h, --help Print a summary of the options\n");
fprintf(stderr, " -v, --version Print the version number\n\n");
fprintf(stderr, " PASSWORD Plaintext password to crypt\n\n");
fprintf(stderr, "If no passwords are given on the command line, you will "
"be asked for one\non standard input.\n\n");
return 0;
}
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