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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 Theo de Raadt.
* 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 <stdio.h>
#include <string.h>
#include <err.h>
#include <pwd.h>
#define NUM_OPTIONS 2 /* Number of hardcoded defaults */
#define LINE_MAX 100 /* Max. length of one config file */
static const char options[NUM_OPTIONS][2][80] =
{
{"local_cipher", "blowfish,4"},
{"yp_cipher", "old"}
};
/* Read lines and removes trailers. */
static int
read_line(fp, line, max)
FILE *fp;
char *line;
int max;
{
char *p, *c;
/* Read one line of config */
if (fgets(line, max, fp) == 0)
return 0;
if (!(p = strchr(line, '\n'))) {
warnx("line too long");
return 0;
}
*p = '\0';
/* Remove comments */
if ((p = strchr(line, '#')))
*p = '\0';
/* Remove trailing spaces */
p = line;
while (isspace(*p))
p++;
memcpy(line, p, strlen(p) + 1);
p = line + strlen(line) - 1;
while (isspace(*p))
p--;
*(p + 1) = '\0';
return 1;
}
static const char *
pwd_default(option)
char *option;
{
int i;
for (i = 0; i < NUM_OPTIONS; i++)
if (!strcasecmp(options[i][0], option))
return options[i][1];
return NULL;
}
void
pwd_gettype(data, max, key, option)
char *data;
int max;
char *key;
char *option;
{
FILE *fp;
char line[LINE_MAX];
static char result[LINE_MAX];
int defaultw;
int keyw;
int got;
result[0] = '\0';
if ((fp = fopen(_PATH_PASSWDCONF, "r")) == NULL) {
strncpy(data, pwd_default(option), max - 1);
data[max - 1] = '\0';
return;
}
defaultw = 0;
keyw = 0;
got = 0;
while (!keyw && (got || read_line(fp, line, LINE_MAX))) {
got = 0;
if (!strcmp("default:", line))
defaultw = 1;
if (!strncmp(key, line, strlen(key)) &&
line[strlen(key)] == ':')
keyw = 1;
/* Now we found default or specified key */
if (defaultw || keyw) {
while (read_line(fp, line, LINE_MAX)) {
/* Leaving key field */
if (strchr(line, ':')) {
got = 1;
break;
}
if (!strncmp(line, option, strlen(option)) &&
line[strlen(option)] == '=') {
char *p;
p = line + strlen(option) + 1;
while (isspace(*p))
p++;
strcpy(result, p);
break;
}
}
if (keyw)
break;
defaultw = 0;
}
}
fclose(fp);
if (!strlen(result)) {
strncpy(data, pwd_default(option), max - 1);
data[max - 1] = '\0';
return;
}
strncpy(data, result, max - 1);
data[max - 1] = '\0';
}
void
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';
if (max < 10)
return;
switch (type) {
case 'y':
pwd_gettype(option, LINE_MAX, pwd->pw_name, "yp_cipher");
break;
case 'l':
default:
pwd_gettype(option, LINE_MAX, pwd->pw_name, "local_cipher");
break;
}
next = option;
now = strsep(&next, ",");
if (!strcmp(now, "old")) {
(void) srandom((int) time((time_t *) NULL));
to64(&salt[0], random(), 2);
} else
if (!strcmp(now, "newsalt")) {
(void) srandom((int) time((time_t *) NULL));
salt[0] = _PASSWORD_EFMT1;
to64(&salt[1], (long) (29 * 25), 4);
to64(&salt[5], random(), 4);
} 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);
}
}
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