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/*
* Copyright (c) 1999-2016 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <TargetConditionals.h>
#define _PASSWD_FILE "/etc/master.passwd"
#include <stdio.h>
#include <errno.h>
#include <pwd.h>
#include <libc.h>
#include <ctype.h>
#include <string.h>
#include "passwd.h"
#ifdef __SLICK__
#define _PASSWORD_LEN 8
#endif
char* progname = "passwd";
static char *saltchars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./";
void
getpasswd(char *name, int isroot, int minlen, int mixcase, int nonalpha,
char *old_pw, char **new_pw, char **old_clear, char **new_clear)
{
int i, tries, pw_ok, upper, lower, alpha, notalpha;
size_t len;
int isNull;
char *p;
static char obuf[_PASSWORD_LEN+1];
static char nbuf[_PASSWORD_LEN+1];
char salt[9];
printf("Changing password for %s.\n", name);
p = "";
isNull = 0;
if (old_pw == NULL) isNull = 1;
if ((isNull == 0) && (old_pw[0] == '\0')) isNull = 1;
if ((isroot == 0) && (isNull == 0))
{
p = getpass("Old password:");
if (strcmp(crypt(p, old_pw), old_pw))
{
errno = EACCES;
fprintf(stderr, "Sorry\n");
exit(1);
}
}
//strcpy(obuf, p);
snprintf( obuf, sizeof(obuf), "%s", p );
tries = 0;
nbuf[0] = '\0';
for (;;)
{
p = getpass("New password:");
if (!*p)
{
printf("Password unchanged.\n");
exit(0);
}
tries++;
len = strlen(p);
upper = 0;
lower = 0;
alpha = 0;
notalpha = 0;
for (i = 0; i < len; i++)
{
if (isupper(p[i])) upper++;
if (islower(p[i])) lower++;
if (isalpha(p[i])) alpha++;
else notalpha++;
}
pw_ok = 1;
if (len < minlen) pw_ok = 0;
if ((mixcase == 1) && ((upper == 0) || (lower == 0))) pw_ok = 0;
if ((nonalpha == 1) && (notalpha == 0)) pw_ok = 0;
/*
* An insistent root may override security options.
*/
if ((isroot == 1) && (tries > 2)) pw_ok = 1;
/*
* A very insistent user may override security options.
*/
if (tries > 4) pw_ok = 1;
if (pw_ok == 0)
{
if (len < minlen)
printf("Password must be at least %d characters long.\n", minlen);
if ((mixcase == 1) && ((upper == 0) || (lower == 0)))
printf("Password must contain both upper and lower case characters.\n");
if ((nonalpha == 1) && (notalpha == 0))
printf("Password must contain non-alphabetic characters.\n");
continue;
}
//strcpy(nbuf, p);
snprintf( nbuf, sizeof(nbuf), "%s", p );
if (!strcmp(nbuf, getpass("Retype new password:"))) break;
printf("Mismatch; try again, EOF to quit.\n");
}
/*
* Create a random salt
*/
srandom((int)time((time_t *)NULL));
salt[0] = saltchars[random() % strlen(saltchars)];
salt[1] = saltchars[random() % strlen(saltchars)];
salt[2] = '\0';
*new_pw = crypt(nbuf, salt);
*old_clear = obuf;
*new_clear = nbuf;
return;
}
static void
usage(void)
{
fprintf(stderr, "usage: %s [-i infosystem] -l location]] [-u authname] [name]\n", progname);
fprintf(stderr, " infosystem:\n");
fprintf(stderr, " file\n");
fprintf(stderr, " NIS\n");
fprintf(stderr, " OpenDirectory\n");
fprintf(stderr, " PAM\n");
fprintf(stderr, " location (for infosystem):\n");
fprintf(stderr, " file location is path to file (default is %s)\n", _PASSWD_FILE);
fprintf(stderr, " NIS location is NIS domain name\n");
fprintf(stderr, " OpenDirectory location is directory node name\n");
fprintf(stderr, " PAM location is not used\n");
exit(1);
}
int
main(int argc, char *argv[])
{
char* user = NULL;
char* locn = NULL;
char* auth = NULL;
int infosystem, ch;
int free_user = 0;
int res = -1;
#ifdef INFO_PAM
infosystem = INFO_PAM;
#else
#ifdef INFO_OPEN_DIRECTORY
infosystem = INFO_OPEN_DIRECTORY;
#else
infosystem = INFO_FILE;
#endif
#endif
#ifdef INFO_OPEN_DIRECTORY
/* PAM is the default infosystem, but we still want to use OpenDirectory directly when run by root */
if (0 == getuid())
infosystem = INFO_OPEN_DIRECTORY;
#endif
while ((ch = getopt(argc, argv, "i:l:u:")) != -1)
switch(ch) {
case 'i':
if (!strcasecmp(optarg, "file")) {
infosystem = INFO_FILE;
#ifdef INFO_NIS
} else if (!strcasecmp(optarg, "NIS")) {
infosystem = INFO_NIS;
} else if (!strcasecmp(optarg, "YP")) {
infosystem = INFO_NIS;
#endif
#ifdef INFO_OPEN_DIRECTORY
} else if (!strcasecmp(optarg, "opendirectory")) {
infosystem = INFO_OPEN_DIRECTORY;
#endif
#ifdef INFO_PAM
} else if (!strcasecmp(optarg, "PAM")) {
infosystem = INFO_PAM;
#endif
} else {
fprintf(stderr, "%s: Unknown info system \'%s\'.\n",
progname, optarg);
usage();
}
break;
case 'l':
locn = optarg;
break;
case 'u':
auth = optarg;
break;
case '?':
default:
usage();
break;
}
argc -= optind;
argv += optind;
if (argc > 1) {
usage();
} else if (argc == 1) {
user = argv[0];
}
#ifdef INFO_PAM
if (INFO_PAM == infosystem && NULL != locn)
usage();
#endif
if (user == NULL)
{
/*
* Verify that the login name exists.
* lukeh 24 Dec 1997
*/
/* getlogin() is the wrong thing to use here because it returns the wrong user after su */
/* sns 5 Jan 2005 */
struct passwd * userRec = getpwuid(getuid());
if (userRec != NULL && userRec->pw_name != NULL) {
/* global static mem is volatile; must strdup */
user = strdup(userRec->pw_name);
free_user = 1;
}
if (user == NULL)
{
fprintf(stderr, "you don't have a login name\n");
exit(1);
}
}
switch (infosystem)
{
case INFO_FILE:
res = file_passwd(user, locn);
break;
#ifdef INFO_NIS
case INFO_NIS:
res = nis_passwd(user, locn);
break;
#endif
#ifdef INFO_OPEN_DIRECTORY
case INFO_OPEN_DIRECTORY:
res = od_passwd(user, locn, auth);
break;
#endif
#ifdef INFO_PAM
case INFO_PAM:
res = pam_passwd(user);
break;
#endif
}
if (res == 0)
{
printf("\n");
printf("################################### WARNING ###################################\n");
printf("# This tool does not update the login keychain password. #\n");
printf("# To update it, run `security set-keychain-password` as the user in question, #\n");
printf("# or as root providing a path to such user's login keychain. #\n");
printf("###############################################################################\n");
printf("\n");
}
if (free_user == 1)
free(user);
exit(0);
}
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