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/*
* Copyright 1997 Niels Provos <provos@physnet.uni-hamburg.de>
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Niels Provos.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 <sys/syslimits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <pwd.h>
#include <util.h>
#include <time.h>
void to64 __P((char *, int32_t, int n));
int
pwd_gensalt(salt, max, pwd, type)
char *salt;
int max;
struct passwd *pwd;
char type;
{
char *bcrypt_gensalt __P((u_int8_t));
char option[LINE_MAX];
char *next, *now;
*salt = '\0';
switch (type) {
case 'y':
pw_getconf(option, LINE_MAX, pwd->pw_name, "ypcipher");
break;
case 'l':
default:
pw_getconf(option, LINE_MAX, pwd->pw_name, "localcipher");
break;
}
next = option;
now = strsep(&next, ",");
if (!strcmp(now, "old")) {
if (max < 3)
return 0;
to64(&salt[0], arc4random(), 2);
salt[2] = '\0';
} else if (!strcmp(now, "newsalt")) {
if (max < 10)
return 0;
salt[0] = _PASSWORD_EFMT1;
to64(&salt[1], (int32_t) (29 * 25), 4);
to64(&salt[5], arc4random(), 4);
salt[9] = '\0';
} else if (!strcmp(now, "md5")) {
if (max < 13) /* $1$8salt$\0 */
return 0;
strcpy(salt, "$1$");
to64(&salt[3], arc4random(), 4);
to64(&salt[7], arc4random(), 4);
strcpy(&salt[11], "$");
} else if (!strcmp(now, "blowfish")) {
int rounds = atoi(next);
if (rounds < 4)
rounds = 4;
strncpy(salt, bcrypt_gensalt(rounds), max - 1);
salt[max - 1] = 0;
} else {
strcpy(salt, ":");
warnx("Unkown option %s.", now);
}
return 1;
}
static unsigned char itoa64[] = /* 0 ... 63 => ascii - 64 */
"./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
void
to64(s, v, n)
register char *s;
register int32_t v;
register int n;
{
while (--n >= 0) {
*s++ = itoa64[v&0x3f];
v >>= 6;
}
}
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