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/* $OpenBSD: encrypt.c,v 1.3 1996/08/26 08:41:26 downsj Exp $ */
/*
* Copyright (c) 1996, Jason Downs. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <stdio.h>
#include <sys/types.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
/*
* Very simple little program, for encrypting passwords from the command
* line. Useful for scripts and such.
*/
extern char *optarg;
extern int optind;
char *progname;
void usage()
{
errx(1, "usage: %s [-k] [-m] [-s salt] [string]", progname);
}
char *trim(line)
char *line;
{
char *ptr;
for (ptr = &line[strlen(line)-1]; ptr > line; ptr--) {
if (!isspace(*ptr))
break;
}
ptr[1] = '\0';
for (ptr = line; *ptr && isspace(*ptr); ptr++);
return(ptr);
}
int main(argc, argv)
int argc;
char *argv[];
{
int opt;
int do_md5 = 0;
int do_makekey = 0;
char *salt = (char *)NULL;
if ((progname = strrchr(argv[0], '/')))
progname++;
else
progname = argv[0];
if (strcmp(progname, "makekey") == 0)
do_makekey = 1;
while ((opt = getopt(argc, argv, "kms:")) != -1) {
switch (opt) {
case 'k':
do_makekey = 1;
break;
case 'm':
do_md5 = 1;
break;
case 's':
salt = optarg;
break;
default:
usage();
}
}
if (do_md5 && !do_makekey && (salt != (char *)NULL))
usage();
if (!do_md5 && !do_makekey && (salt == (char *)NULL))
usage();
if (do_makekey && (do_md5 || (salt != (char *)NULL)))
usage();
if ((argc - optind) < 1) {
char line[BUFSIZ], *string, msalt[3];
/* Encrypt stdin to stdout. */
while (!feof(stdin) && (fgets(line, sizeof(line), stdin) != NULL)) {
/* Kill the whitesapce. */
string = trim(line);
if (*string == '\0')
continue;
if (do_makekey) {
/*
* makekey mode: parse string into seperate DES key and salt.
*/
if (strlen(string) != 10) {
/* To be compatible... */
fprintf (stderr, "%s: %s\n", progname, strerror(EFTYPE));
exit (1);
}
strcpy(msalt, &string[8]);
salt = msalt;
}
fputs(crypt(string, (do_md5 ? "$1$" : salt)), stdout);
if (do_makekey) {
fflush(stdout);
break;
}
fputc('\n', stdout);
}
} else {
char *string;
/* Perhaps it isn't worth worrying about, but... */
string = strdup(argv[optind]);
if (string == (char *)NULL)
err(1, NULL);
/* Wipe the argument. */
bzero(argv[optind], strlen(argv[optind]));
fputs(crypt(string, (do_md5 ? "$1$" : salt)), stdout);
fputc('\n', stdout);
/* Wipe our copy, before we free it. */
bzero(string, strlen(string));
free(string);
}
exit(0);
}
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