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samba-mirror/source3/utils/smbpasswd.c
Andreas Schneider d1d2a03d73 s3:utils: Initialize the memcache for smbpasswd
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Fri Oct 27 06:51:48 UTC 2023 on atb-devel-224
2023-10-27 06:51:48 +00:00

679 lines
16 KiB
C

/*
* 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "includes.h"
#include "system/passwd.h"
#include "secrets.h"
#include "../librpc/gen_ndr/samr.h"
#include "../lib/util/util_pw.h"
#include "libsmb/proto.h"
#include "passdb.h"
#include "cmdline_contexts.h"
#include "passwd_proto.h"
#include "lib/util/string_wrappers.h"
#include "lib/param/param.h"
#include "lib/util/memcache.h"
/*
* 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_username = False;
static bool stdin_passwd_get = False;
static fstring user_name;
static char *new_passwd = NULL;
static const char *remote_machine = NULL;
static fstring ldap_secret;
/*********************************************************
Print command usage on stderr and die.
**********************************************************/
static void usage(void)
{
printf("When run by root:\n");
printf(" smbpasswd [options] [username]\n");
printf("otherwise:\n");
printf(" smbpasswd [options]\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 (e.g. SAM/user)\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 use stdin ldap admin 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,
struct loadparm_context *lp_ctx)
{
int ch;
const char *configfile = get_dyn_CONFIGFILE();
local_flags |= LOCAL_SET_PASSWORD;
ZERO_STRUCT(user_name);
user_name[0] = '\0';
while ((ch = getopt(argc, argv, "c:axdehminjr:sw:R:D:U:LWS:")) != EOF) {
switch(ch) {
case 'L':
if (getuid() != 0) {
fprintf(stderr, "smbpasswd -L can only be used by root.\n");
exit(1);
}
local_flags |= LOCAL_AM_ROOT;
break;
case 'c':
configfile = optarg;
set_dyn_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;
SAFE_FREE(new_passwd);
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':
lpcfg_set_cmdline(lp_ctx, "name resolve order", optarg);
break;
case 'D':
lpcfg_set_cmdline(lp_ctx, "log level", optarg);
break;
case 'U': {
got_username = True;
fstrcpy(user_name, optarg);
break;
case 'W':
local_flags |= LOCAL_SET_LDAP_ADMIN_PW;
*ldap_secret = '\0';
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)) {
usage();
} else {
if (got_username) {
usage();
} else {
fstrcpy(user_name, argv[0]);
}
}
break;
default:
usage();
}
if (!lp_load_global(configfile)) {
fprintf(stderr, "Can't load %s - run testparm to debug it\n",
configfile);
exit(1);
}
return local_flags;
}
/*************************************************************
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);
if (p == NULL) {
return NULL;
}
fstrcpy(new_pw, p);
SAFE_FREE(p);
p = get_pass("Retype new SMB password:", stdin_get);
if (p == NULL) {
return NULL;
}
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 NTSTATUS password_change(const char *remote_mach,
const char *domain, const char *username,
const char *old_passwd, const char *new_pw,
int local_flags)
{
NTSTATUS ret;
char *err_str = NULL;
char *msg_str = NULL;
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 */
fprintf(stderr, "Invalid remote operation!\n");
return NT_STATUS_UNSUCCESSFUL;
}
ret = remote_password_change(remote_mach,
domain, username,
old_passwd, new_pw, &err_str);
} else {
ret = local_password_change(username, local_flags, new_pw,
&err_str, &msg_str);
}
if (msg_str) {
printf("%s", msg_str);
}
if (err_str) {
fprintf(stderr, "%s", err_str);
}
if (!NT_STATUS_IS_OK(ret) && !err_str) {
fprintf(stderr, "Failed to change password!\n");
}
SAFE_FREE(msg_str);
SAFE_FREE(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) {
const char *ldap_admin_dn = lp_ldap_admin_dn();
if ( ! *ldap_admin_dn ) {
DEBUG(0,("ERROR: 'ldap admin dn' not defined! Please check your smb.conf\n"));
goto done;
}
printf("Setting stored password for \"%s\" in secrets.tdb\n", ldap_admin_dn);
if ( ! *ldap_secret ) {
new_passwd = prompt_for_new_password(stdin_passwd_get);
if (new_passwd == NULL) {
fprintf(stderr, "Failed to read new password!\n");
exit(1);
}
fstrcpy(ldap_secret, new_passwd);
}
if (!store_ldap_admin_pw(ldap_secret)) {
DEBUG(0,("ERROR: Failed to store the ldap admin password!\n"));
}
goto done;
}
/* Ensure passdb startup(). */
if(!initialize_password_db(False, NULL)) {
DEBUG(0, ("Failed to open passdb!\n"));
exit(1);
}
/* Ensure we have a SAM sid. */
get_global_sam_sid();
/*
* 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(talloc_tos(), geteuid()))) {
fstrcpy(user_name, pwd->pw_name);
TALLOC_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 */
size_t user_name_len = strlen(user_name);
if (user_name[user_name_len - 1] == '$') {
user_name_len--;
} else {
if (user_name_len + 2 > sizeof(user_name)) {
fprintf(stderr, "machine name too long\n");
exit(1);
}
user_name[user_name_len] = '$';
user_name[user_name_len + 1] = '\0';
}
if (local_flags & LOCAL_ADD_USER) {
SAFE_FREE(new_passwd);
/*
* Remove any trailing '$' before we
* generate the initial machine password.
*/
new_passwd = smb_xstrndup(user_name, user_name_len);
if (!strlower_m(new_passwd)) {
fprintf(stderr, "strlower_m %s failed\n",
new_passwd);
exit(1);
}
}
} else if (local_flags & LOCAL_INTERDOM_ACCOUNT) {
size_t user_name_len = strlen(user_name);
if (user_name[user_name_len - 1] != '$') {
if (user_name_len + 2 > sizeof(user_name)) {
fprintf(stderr, "machine name too long\n");
exit(1);
}
user_name[user_name_len] = '$';
user_name[user_name_len + 1] = '\0';
}
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);
}
}
} else {
if (remote_machine != NULL) {
old_passwd = get_pass("Old SMB password:",stdin_passwd_get);
if(!old_passwd) {
fprintf(stderr, "Unable to get old password.\n");
exit(1);
}
}
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) {
struct samu *sampass = NULL;
sampass = samu_new( NULL );
if (!sampass) {
fprintf(stderr, "talloc fail for struct samu.\n");
exit(1);
}
if (!pdb_getsampwnam(sampass, user_name)) {
fprintf(stderr, "Failed to find user %s in passdb backend.\n",
user_name );
exit(1);
}
if(pdb_get_nt_passwd(sampass) == NULL) {
local_flags |= LOCAL_SET_PASSWORD;
}
TALLOC_FREE(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 (!NT_STATUS_IS_OK(password_change(remote_machine,
NULL, user_name,
old_passwd, new_passwd,
local_flags))) {
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))) {
struct samu *sampass = NULL;
sampass = samu_new( NULL );
if (!sampass) {
fprintf(stderr, "talloc fail for struct samu.\n");
exit(1);
}
if (!pdb_getsampwnam(sampass, user_name)) {
fprintf(stderr, "Failed to find user %s in passdb backend.\n",
user_name );
exit(1);
}
printf("Password changed for user %s.", user_name );
if(pdb_get_acct_ctrl(sampass)&ACB_DISABLED) {
printf(" User has disabled flag set.");
}
if(pdb_get_acct_ctrl(sampass) & ACB_PWNOTREQ) {
printf(" User has no password flag set.");
}
printf("\n");
TALLOC_FREE(sampass);
}
done:
SAFE_FREE(old_passwd);
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;
const char *username = user_name;
const char *domain = NULL;
char *p = 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(talloc_tos(), getuid());
if (pwd) {
fstrcpy(user_name,pwd->pw_name);
TALLOC_FREE(pwd);
} else {
fprintf(stderr, "smbpasswd: cannot lookup user name for uid %u\n", (unsigned int)getuid());
exit(1);
}
}
/* Allow domain as part of the username */
if ((p = strchr_m(user_name, '\\')) ||
(p = strchr_m(user_name, '/')) ||
(p = strchr_m(user_name, *lp_winbind_separator()))) {
*p = '\0';
username = p + 1;
domain = user_name;
}
/*
* 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) {
if (!is_ipaddress(remote_machine)) {
domain = remote_machine;
}
} else {
remote_machine = "127.0.0.1";
/*
* If we deal with a local user, change the password for the
* user in our SAM.
*/
domain = get_global_sam_name();
}
old_pw = get_pass("Old SMB password:",stdin_passwd_get);
if (old_pw == NULL) {
fprintf(stderr, "Unable to get old password.\n");
exit(1);
}
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 (!NT_STATUS_IS_OK(password_change(remote_machine,
domain, username,
old_pw, new_pw, 0))) {
result = 1;
goto done;
}
printf("Password changed for user %s\n", username);
done:
SAFE_FREE(old_pw);
SAFE_FREE(new_pw);
return result;
}
/*********************************************************
Start here.
**********************************************************/
int main(int argc, char **argv)
{
TALLOC_CTX *frame = talloc_stackframe();
struct loadparm_context *lp_ctx = NULL;
struct memcache *mcache = NULL;
int local_flags = 0;
int ret;
mcache = memcache_init(NULL, 0);
if (mcache == NULL) {
fprintf(stderr, "%s: memcache_init failed\n", __location__);
return 1;
}
memcache_set_global(mcache);
#if defined(HAVE_SET_AUTH_PARAMETERS)
set_auth_parameters(argc, argv);
#endif /* HAVE_SET_AUTH_PARAMETERS */
if (getuid() == 0) {
local_flags = LOCAL_AM_ROOT;
}
smb_init_locale();
lp_ctx = loadparm_init_s3(frame, loadparm_s3_helpers());
if (lp_ctx == NULL) {
fprintf(stderr,
"Failed to initialise the global parameter structure.\n");
return 1;
}
local_flags = process_options(argc, argv, local_flags, lp_ctx);
setup_logging("smbpasswd", DEBUG_STDERR);
/* 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) {
bool ok;
ok = secrets_init();
if (!ok) {
return 1;
}
ret = process_root(local_flags);
} else {
ret = process_nonroot(local_flags);
}
gfree_all();
TALLOC_FREE(frame);
return ret;
}