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/* $OpenBSD: encrypt.c,v 1.14 2001/07/31 18:12:02 millert 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 <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pwd.h>
#include <ctype.h>
#include <login_cap.h>
/*
* Very simple little program, for encrypting passwords from the command
* line. Useful for scripts and such.
*/
#define DO_MAKEKEY 0
#define DO_DES 1
#define DO_MD5 2
#define DO_BLF 3
extern char *optarg;
extern int optind;
char *progname;
char buffer[_PASSWORD_LEN];
void usage()
{
fprintf(stderr, "usage: %s [-k] [-b rounds] [-m] [-s salt] [-p | string]\n",
progname);
exit(1);
}
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);
}
void print_passwd(char *string, int operation, void *extra)
{
char msalt[3], *salt;
struct passwd pwd;
login_cap_t *lc;
extern int pwd_gensalt __P((char *, int, struct passwd *, login_cap_t *, char));
extern void to64 __P((char *, int32_t, int n));
switch(operation) {
case DO_MAKEKEY:
/*
* makekey mode: parse string into separate 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;
break;
case DO_MD5:
strcpy(buffer, "$1$");
to64(&buffer[3], arc4random(), 4);
to64(&buffer[7], arc4random(), 4);
strcpy(buffer+11, "$");
salt = buffer;
break;
case DO_BLF:
strncpy(buffer, bcrypt_gensalt(*(int *)extra), _PASSWORD_LEN - 1);
buffer[_PASSWORD_LEN-1] = 0;
salt = buffer;
break;
case DO_DES:
salt = extra;
break;
default:
pwd.pw_name = "default";
if ((lc = login_getclass(NULL)) == NULL) {
fprintf(stderr, "%s: unable to get default login class.\n",
progname);
exit (1);
}
if (!pwd_gensalt(buffer, _PASSWORD_LEN, &pwd, lc, 'l')) {
fprintf (stderr, "%s: Can't generate salt\n", progname);
exit (1);
}
salt = buffer;
break;
}
fputs(crypt(string, salt), stdout);
}
int main(argc, argv)
int argc;
char *argv[];
{
int opt;
int operation = -1;
int prompt = 0;
int rounds;
void *extra; /* Store salt or number of rounds */
if ((progname = strrchr(argv[0], '/')))
progname++;
else
progname = argv[0];
if (strcmp(progname, "makekey") == 0)
operation = DO_MAKEKEY;
while ((opt = getopt(argc, argv, "kmps:b:")) != -1) {
switch (opt) {
case 'k': /* Stdin/Stdout Unix crypt */
if (operation != -1 || prompt)
usage();
operation = DO_MAKEKEY;
break;
case 'm': /* MD5 password hash */
if (operation != -1)
usage();
operation = DO_MD5;
break;
case 'p':
if (operation == DO_MAKEKEY)
usage();
prompt = 1;
break;
case 's': /* Unix crypt (DES) */
if (operation != -1)
usage();
operation = DO_DES;
if (optarg[0] == '$') /* -s is only for DES. */
usage();
extra = optarg;
break;
case 'b': /* Blowfish password hash */
if (operation != -1)
usage();
operation = DO_BLF;
rounds = atoi(optarg);
extra = &rounds;
break;
default:
usage();
}
}
if (((argc - optind) < 1) || operation == DO_MAKEKEY) {
char line[BUFSIZ], *string;
if (prompt) {
string = getpass("Enter string: ");
print_passwd(string, operation, extra);
fputc('\n', stdout);
} else {
/* Encrypt stdin to stdout. */
while (!feof(stdin) && (fgets(line, sizeof(line), stdin) != NULL)) {
/* Kill the whitesapce. */
string = trim(line);
if (*string == '\0')
continue;
print_passwd(string, operation, extra);
if (operation == DO_MAKEKEY) {
fflush(stdout);
break;
}
fputc('\n', stdout);
}
}
} else {
char *string;
/* can't combine -p with a supplied string */
if (prompt)
usage();
/* Perhaps it isn't worth worrying about, but... */
string = strdup(argv[optind]);
if (string == NULL)
err(1, NULL);
/* Wipe the argument. */
bzero(argv[optind], strlen(argv[optind]));
print_passwd(string, operation, extra);
fputc('\n', stdout);
/* Wipe our copy, before we free it. */
bzero(string, strlen(string));
free(string);
}
exit(0);
}
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