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/*
* Unix SMB/CIFS implementation.
* Copyright (C) Jeremy Allison 1995-1998
* Copyright (C) Tim Potter 2001
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 675
* Mass Ave, Cambridge, MA 02139, USA. */
#include "includes.h"
extern BOOL AllowDebugChange;
/*
* Next two lines needed for SunOS and don't
* hurt anything else...
*/
extern char *optarg;
extern int optind;
/* forced running in root-mode */
static BOOL got_pass = False, got_username = False;
static BOOL stdin_passwd_get = False;
static fstring user_name, user_password;
static char *new_passwd = NULL;
static const char *remote_machine = NULL;
static fstring ldap_secret;
/* FUNCTION DECLARATIONS */
BOOL remote_password_change(const char *rmachine, const char *username,
const char *old_pw, const char *new_pw,
char *err_str, size_t err_str_len);
/*********************************************************
Print command usage on stderr and die.
**********************************************************/
static void usage(void)
{
printf("When run by root:\n");
printf(" smbpasswd [options] [username] [password]\n");
printf("otherwise:\n");
printf(" smbpasswd [options] [password]\n\n");
printf("options:\n");
printf(" -L local mode (must be first option)\n");
printf(" -h print this usage message\n");
printf(" -s use stdin for password prompt\n");
printf(" -c smb.conf file Use the given path to the smb.conf file\n");
printf(" -D LEVEL debug level\n");
printf(" -r MACHINE remote machine\n");
printf(" -U USER remote username\n");
printf("extra options when run by root or in local mode:\n");
printf(" -a add user\n");
printf(" -d disable user\n");
printf(" -e enable user\n");
printf(" -i interdomain trust account\n");
printf(" -m machine trust account\n");
printf(" -n set no password\n");
printf(" -w PASSWORD ldap admin password\n");
printf(" -x delete user\n");
printf(" -R ORDER name resolve order\n");
exit(1);
}
static void set_line_buffering(FILE *f)
{
setvbuf(f, NULL, _IOLBF, 0);
}
/*******************************************************************
Process command line options
******************************************************************/
static int process_options(int argc, char **argv, int local_flags)
{
int ch;
pstring configfile;
pstrcpy(configfile, dyn_CONFIGFILE);
local_flags |= LOCAL_SET_PASSWORD;
ZERO_STRUCT(user_name);
ZERO_STRUCT(user_password);
user_name[0] = '\0';
while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:L")) != EOF) {
switch(ch) {
case 'L':
local_flags |= LOCAL_AM_ROOT;
break;
case 'c':
pstrcpy(configfile,optarg);
break;
case 'a':
local_flags |= LOCAL_ADD_USER;
break;
case 'x':
local_flags |= LOCAL_DELETE_USER;
local_flags &= ~LOCAL_SET_PASSWORD;
break;
case 'd':
local_flags |= LOCAL_DISABLE_USER;
local_flags &= ~LOCAL_SET_PASSWORD;
break;
case 'e':
local_flags |= LOCAL_ENABLE_USER;
local_flags &= ~LOCAL_SET_PASSWORD;
break;
case 'm':
local_flags |= LOCAL_TRUST_ACCOUNT;
break;
case 'i':
local_flags |= LOCAL_INTERDOM_ACCOUNT;
break;
case 'j':
d_printf("See 'net join' for this functionality\n");
exit(1);
break;
case 'n':
local_flags |= LOCAL_SET_NO_PASSWORD;
local_flags &= ~LOCAL_SET_PASSWORD;
new_passwd = smb_xstrdup("NO PASSWORD");
break;
case 'r':
remote_machine = optarg;
break;
case 's':
set_line_buffering(stdin);
set_line_buffering(stdout);
set_line_buffering(stderr);
stdin_passwd_get = True;
break;
case 'w':
local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
fstrcpy(ldap_secret, optarg);
break;
case 'R':
lp_set_name_resolve_order(optarg);
break;
case 'D':
DEBUGLEVEL = atoi(optarg);
break;
case 'U': {
char *lp;
got_username = True;
fstrcpy(user_name, optarg);
if ((lp = strchr(user_name, '%'))) {
*lp = 0;
fstrcpy(user_password, lp + 1);
got_pass = True;
memset(strchr_m(optarg, '%') + 1, 'X',
strlen(user_password));
}
break;
}
case 'h':
default:
usage();
}
}
argc -= optind;
argv += optind;
switch(argc) {
case 0:
if (!got_username)
fstrcpy(user_name, "");
break;
case 1:
if (!(local_flags & LOCAL_AM_ROOT)) {
new_passwd = argv[0];
} else {
if (got_username) {
usage();
} else {
fstrcpy(user_name, argv[0]);
}
}
break;
case 2:
if (!(local_flags & LOCAL_AM_ROOT) || got_username || got_pass) {
usage();
}
fstrcpy(user_name, argv[0]);
new_passwd = smb_xstrdup(argv[1]);
break;
default:
usage();
}
if (!lp_load(configfile,True,False,False)) {
fprintf(stderr, "Can't load %s - run testparm to debug it\n",
dyn_CONFIGFILE);
exit(1);
}
return local_flags;
}
/*************************************************************
Utility function to prompt for passwords from stdin. Each
password entered must end with a newline.
*************************************************************/
static char *stdin_new_passwd(void)
{
static fstring new_pw;
size_t len;
ZERO_ARRAY(new_pw);
/*
* if no error is reported from fgets() and string at least contains
* the newline that ends the password, then replace the newline with
* a null terminator.
*/
if ( fgets(new_pw, sizeof(new_pw), stdin) != NULL) {
if ((len = strlen(new_pw)) > 0) {
if(new_pw[len-1] == '\n')
new_pw[len - 1] = 0;
}
}
return(new_pw);
}
/*************************************************************
Utility function to get passwords via tty or stdin
Used if the '-s' option is set to silently get passwords
to enable scripting.
*************************************************************/
static char *get_pass( const char *prompt, BOOL stdin_get)
{
char *p;
if (stdin_get) {
p = stdin_new_passwd();
} else {
p = getpass(prompt);
}
return smb_xstrdup(p);
}
/*************************************************************
Utility function to prompt for new password.
*************************************************************/
static char *prompt_for_new_password(BOOL stdin_get)
{
char *p;
fstring new_pw;
ZERO_ARRAY(new_pw);
p = get_pass("New SMB password:", stdin_get);
fstrcpy(new_pw, p);
SAFE_FREE(p);
p = get_pass("Retype new SMB password:", stdin_get);
if (strcmp(p, new_pw)) {
fprintf(stderr, "Mismatch - password unchanged.\n");
ZERO_ARRAY(new_pw);
SAFE_FREE(p);
return NULL;
}
return p;
}
/*************************************************************
Change a password either locally or remotely.
*************************************************************/
static BOOL password_change(const char *remote_mach, char *username,
char *old_passwd, char *new_pw, int local_flags)
{
BOOL ret;
pstring err_str;
pstring msg_str;
if (remote_mach != NULL) {
if (local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|
LOCAL_TRUST_ACCOUNT|LOCAL_SET_NO_PASSWORD)) {
/* these things can't be done remotely yet */
return False;
}
ret = remote_password_change(remote_mach, username,
old_passwd, new_pw, err_str, sizeof(err_str));
if(*err_str)
fprintf(stderr, err_str);
return ret;
}
ret = local_password_change(username, local_flags, new_pw,
err_str, sizeof(err_str), msg_str, sizeof(msg_str));
if(*msg_str)
printf(msg_str);
if(*err_str)
fprintf(stderr, err_str);
return ret;
}
/*******************************************************************
Store the LDAP admin password in secrets.tdb
******************************************************************/
static BOOL store_ldap_admin_pw (char* pw)
{
if (!pw)
return False;
if (!secrets_init())
return False;
return secrets_store_ldap_pw(lp_ldap_admin_dn(), pw);
}
/*************************************************************
Handle password changing for root.
*************************************************************/
static int process_root(int local_flags)
{
struct passwd *pwd;
int result = 0;
char *old_passwd = NULL;
if (local_flags & LOCAL_SET_LDAP_ADMIN_PW)
{
printf("Setting stored password for \"%s\" in secrets.tdb\n",
lp_ldap_admin_dn());
if (!store_ldap_admin_pw(ldap_secret))
DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
goto done;
}
/*
* Ensure both add/delete user are not set
* Ensure add/delete user and either remote machine or join domain are
* not both set.
*/
if(((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) == (LOCAL_ADD_USER|LOCAL_DELETE_USER)) ||
((local_flags & (LOCAL_ADD_USER|LOCAL_DELETE_USER)) &&
(remote_machine != NULL))) {
usage();
}
/* Only load interfaces if we are doing network operations. */
if (remote_machine) {
load_interfaces();
}
if (!user_name[0] && (pwd = getpwuid_alloc(geteuid()))) {
fstrcpy(user_name, pwd->pw_name);
passwd_free(&pwd);
}
if (!user_name[0]) {
fprintf(stderr,"You must specify a username\n");
exit(1);
}
if (local_flags & LOCAL_TRUST_ACCOUNT) {
/* add the $ automatically */
static fstring buf;
/*
* Remove any trailing '$' before we
* generate the initial machine password.
*/
if (user_name[strlen(user_name)-1] == '$') {
user_name[strlen(user_name)-1] = 0;
}
if (local_flags & LOCAL_ADD_USER) {
SAFE_FREE(new_passwd);
new_passwd = smb_xstrdup(user_name);
strlower_m(new_passwd);
}
/*
* Now ensure the username ends in '$' for
* the machine add.
*/
slprintf(buf, sizeof(buf)-1, "%s$", user_name);
fstrcpy(user_name, buf);
} else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
static fstring buf;
if ((local_flags & LOCAL_ADD_USER) && (new_passwd == NULL)) {
/*
* Prompt for trusting domain's account password
*/
new_passwd = prompt_for_new_password(stdin_passwd_get);
if(!new_passwd) {
fprintf(stderr, "Unable to get newpassword.\n");
exit(1);
}
}
/* prepare uppercased and '$' terminated username */
slprintf(buf, sizeof(buf) - 1, "%s$", user_name);
fstrcpy(user_name, buf);
} else {
if (remote_machine != NULL) {
old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
}
if (!(local_flags & LOCAL_SET_PASSWORD)) {
/*
* If we are trying to enable a user, first we need to find out
* if they are using a modern version of the smbpasswd file that
* disables a user by just writing a flag into the file. If so
* then we can re-enable a user without prompting for a new
* password. If not (ie. they have a no stored password in the
* smbpasswd file) then we need to prompt for a new password.
*/
if(local_flags & LOCAL_ENABLE_USER) {
SAM_ACCOUNT *sampass = NULL;
BOOL ret;
pdb_init_sam(&sampass);
ret = pdb_getsampwnam(sampass, user_name);
if((sampass != False) && (pdb_get_lanman_passwd(sampass) == NULL)) {
local_flags |= LOCAL_SET_PASSWORD;
}
pdb_free_sam(&sampass);
}
}
if((local_flags & LOCAL_SET_PASSWORD) && (new_passwd == NULL)) {
new_passwd = prompt_for_new_password(stdin_passwd_get);
if(!new_passwd) {
fprintf(stderr, "Unable to get new password.\n");
exit(1);
}
}
}
if (!password_change(remote_machine, user_name, old_passwd, new_passwd, local_flags)) {
fprintf(stderr,"Failed to modify password entry for user %s\n", user_name);
result = 1;
goto done;
}
if(remote_machine) {
printf("Password changed for user %s on %s.\n", user_name, remote_machine );
} else if(!(local_flags & (LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_ENABLE_USER|LOCAL_DELETE_USER|LOCAL_SET_NO_PASSWORD|LOCAL_SET_PASSWORD))) {
SAM_ACCOUNT *sampass = NULL;
BOOL ret;
pdb_init_sam(&sampass);
ret = pdb_getsampwnam(sampass, user_name);
printf("Password changed for user %s.", user_name );
if( (ret != False) && (pdb_get_acct_ctrl(sampass)&ACB_DISABLED) )
printf(" User has disabled flag set.");
if((ret != False) && (pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) )
printf(" User has no password flag set.");
printf("\n");
pdb_free_sam(&sampass);
}
done:
SAFE_FREE(new_passwd);
return result;
}
/*************************************************************
Handle password changing for non-root.
*************************************************************/
static int process_nonroot(int local_flags)
{
struct passwd *pwd = NULL;
int result = 0;
char *old_pw = NULL;
char *new_pw = NULL;
if (local_flags & ~(LOCAL_AM_ROOT | LOCAL_SET_PASSWORD)) {
/* Extra flags that we can't honor non-root */
usage();
}
if (!user_name[0]) {
pwd = getpwuid_alloc(getuid());
if (pwd) {
fstrcpy(user_name,pwd->pw_name);
passwd_free(&pwd);
} else {
fprintf(stderr, "smbpasswd: you don't exist - go away\n");
exit(1);
}
}
/*
* A non-root user is always setting a password
* via a remote machine (even if that machine is
* localhost).
*/
load_interfaces(); /* Delayed from main() */
if (remote_machine == NULL) {
remote_machine = "127.0.0.1";
}
if (remote_machine != NULL) {
old_pw = get_pass("Old SMB password:",stdin_passwd_get);
}
if (!new_passwd) {
new_pw = prompt_for_new_password(stdin_passwd_get);
}
else
new_pw = smb_xstrdup(new_passwd);
if (!new_pw) {
fprintf(stderr, "Unable to get new password.\n");
exit(1);
}
if (!password_change(remote_machine, user_name, old_pw, new_pw, 0)) {
fprintf(stderr,"Failed to change password for %s\n", user_name);
result = 1;
goto done;
}
printf("Password changed for user %s\n", user_name);
done:
SAFE_FREE(old_pw);
SAFE_FREE(new_pw);
return result;
}
/*********************************************************
Start here.
**********************************************************/
int main(int argc, char **argv)
{
int local_flags = 0;
AllowDebugChange = False;
#if defined(HAVE_SET_AUTH_PARAMETERS)
set_auth_parameters(argc, argv);
#endif /* HAVE_SET_AUTH_PARAMETERS */
if (getuid() == 0) {
local_flags = LOCAL_AM_ROOT;
}
local_flags = process_options(argc, argv, local_flags);
setup_logging("smbpasswd", True);
/*
* Set the machine NETBIOS name if not already
* set from the config file.
*/
if (!init_names())
return 1;
/* Check the effective uid - make sure we are not setuid */
if (is_setuid_root()) {
fprintf(stderr, "smbpasswd must *NOT* be setuid root.\n");
exit(1);
}
if (local_flags & LOCAL_AM_ROOT) {
secrets_init();
return process_root(local_flags);
}
return process_nonroot(local_flags);
}
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