path: root/source3/passdb/pdb_tdb.c

/*
 * Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup
 * Copyright (C) Andrew Tridgell 1992-1998
 * Copyright (C) Simo Sorce 2000
 * Copyright (C) Gerald Carter 2000
 * 
 * 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"

#ifdef WITH_TDBPWD

#define PDB_VERSION		"20010830"
#define PASSDB_FILE_NAME	"/passdb.tdb"
#define TDB_FORMAT_STRING	"ddddddBBBBBBBBBBBBddBBwdwdBdd"
#define USERPREFIX		"USER_"
#define RIDPREFIX		"RID_"

extern int 		DEBUGLEVEL;
extern pstring 		samlogon_user;
extern BOOL 		sam_logon_in_ssb;


struct tdb_enum_info
{
	TDB_CONTEXT 	*passwd_tdb;
	TDB_DATA 	key;
};

static struct tdb_enum_info 	global_tdb_ent;
/*static SAM_ACCOUNT 		global_sam_pass;*/

/**********************************************************************
 Intialize a SAM_ACCOUNT struct from a BYTE buffer of size len
 *********************************************************************/
static BOOL init_sam_from_buffer (SAM_ACCOUNT *sampass, uint8 *buf, 
				  uint32 buflen)
{

	/* times are stored as 32bit integer
	   take care on system with 64bit wide time_t
	   --SSS */
	uint32	logon_time,
		logoff_time,
		kickoff_time,
		pass_last_set_time,
		pass_can_change_time,
		pass_must_change_time;
	char *username;
	char *domain;
	char *nt_username;
	char *dir_drive;
	char *unknown_str;
	char *munged_dial;
	char *fullname;
	char *homedir;
	char *logon_script;
	char *profile_path;
	char *acct_desc;
	char *workstations;
	uint32	username_len, domain_len, nt_username_len,
		dir_drive_len, unknown_str_len, munged_dial_len,
		fullname_len, homedir_len, logon_script_len,
		profile_path_len, acct_desc_len, workstations_len;
		
	uint32	/* uid, gid,*/ user_rid, group_rid, unknown_3, hours_len, unknown_5, unknown_6;
	uint16	acct_ctrl, logon_divs;
	uint8	*hours;
	static uint8	*lm_pw_ptr,
			*nt_pw_ptr;
	uint32		len = 0;
	uint32		lmpwlen, ntpwlen, hourslen;

									
	/* unpack the buffer into variables */
	len = tdb_unpack (buf, buflen, TDB_FORMAT_STRING,
		&logon_time,
		&logoff_time,
		&kickoff_time,
		&pass_last_set_time,
		&pass_can_change_time,
		&pass_must_change_time,
		&username_len, &username,
		&domain_len, &domain,
		&nt_username_len, &nt_username,
		&fullname_len, &fullname,
		&homedir_len, &homedir,
		&dir_drive_len, &dir_drive,
		&logon_script_len, &logon_script,
		&profile_path_len, &profile_path,
		&acct_desc_len, &acct_desc,
		&workstations_len, &workstations,
		&unknown_str_len, &unknown_str,
		&munged_dial_len, &munged_dial,
		&user_rid,
		&group_rid,
		&lmpwlen, &lm_pw_ptr,
		&ntpwlen, &nt_pw_ptr,
		&acct_ctrl,
		&unknown_3,
		&logon_divs,
		&hours_len,
		&hourslen, &hours,
		&unknown_5,
		&unknown_6);
		
	if (len == -1) 
		return False;

	pdb_set_logon_time(sampass, logon_time);
	pdb_set_logoff_time(sampass, logoff_time);
	pdb_set_kickoff_time(sampass, kickoff_time);
	pdb_set_pass_can_change_time(sampass, pass_can_change_time);
	pdb_set_pass_must_change_time(sampass, pass_must_change_time);
	pdb_set_pass_last_set_time(sampass, pass_last_set_time);

	pdb_set_username     (sampass, username_len?username:NULL);
	pdb_set_domain       (sampass, domain_len?domain:NULL);
	pdb_set_nt_username  (sampass, nt_username_len?nt_username:NULL);
	pdb_set_fullname     (sampass, fullname_len?fullname:NULL);
	pdb_set_homedir      (sampass, homedir_len?homedir:NULL);
	pdb_set_dir_drive    (sampass, dir_drive_len?dir_drive:NULL);
	pdb_set_logon_script (sampass, logon_script_len?logon_script:NULL);
	pdb_set_profile_path (sampass, profile_path_len?profile_path:NULL);
	pdb_set_acct_desc    (sampass, acct_desc_len?acct_desc:NULL);
	pdb_set_workstations (sampass, workstations_len?workstations:NULL);
	pdb_set_munged_dial  (sampass, munged_dial_len?munged_dial:NULL);
	pdb_set_lanman_passwd(sampass, lmpwlen?lm_pw_ptr:NULL);
	pdb_set_nt_passwd    (sampass, ntpwlen?nt_pw_ptr:NULL);

	/*pdb_set_uid(sampass, uid);
	pdb_set_gid(sampass, gid);*/
	pdb_set_user_rid(sampass, user_rid);
	pdb_set_group_rid(sampass, group_rid);
	pdb_set_unknown_3(sampass, unknown_3);
	pdb_set_hours_len(sampass, hours_len);
	pdb_set_unknown_5(sampass, unknown_5);
	pdb_set_unknown_6(sampass, unknown_6);
	pdb_set_acct_ctrl(sampass, acct_ctrl);
	pdb_set_logons_divs(sampass, logon_divs);
	pdb_set_hours(sampass, hours);

	/* TODO: free TDB alloced memory !!!!! */
		
	return True;
}

/**********************************************************************
 Intialize a BYTE buffer from a SAM_ACCOUNT struct
 *********************************************************************/
static uint32 init_buffer_from_sam (uint8 **buf, SAM_ACCOUNT *sampass)
{
	size_t		len, buflen;

	/* times are stored as 32bit integer
	   take care on system with 64bit wide time_t
	   --SSS */
	uint32	logon_time,
		logoff_time,
		kickoff_time,
		pass_last_set_time,
		pass_can_change_time,
		pass_must_change_time;
	char *username;
	char *domain;
	char *nt_username;
	char *dir_drive;
	char *unknown_str;
	char *munged_dial;
	char *fullname;
	char *homedir;
	char *logon_script;
	char *profile_path;
	char *acct_desc;
	char *workstations;
	uint32	username_len, domain_len, nt_username_len,
		dir_drive_len, unknown_str_len, munged_dial_len,
		fullname_len, homedir_len, logon_script_len,
		profile_path_len, acct_desc_len, workstations_len;

	uint8		*lm_pw;
	uint8		*nt_pw;
	uint32	lm_pw_len = 16;
	uint32	nt_pw_len = 16;

	/* do we have a valid SAM_ACCOUNT pointer? */
	if (sampass == NULL)
		return -1;
		
	*buf = NULL;
	buflen = 0;

	logon_time = pdb_get_logon_time(sampass);
	logoff_time = pdb_get_logoff_time(sampass);
	kickoff_time = pdb_get_kickoff_time(sampass);
	pass_can_change_time = pdb_get_pass_can_change_time(sampass);
	pass_must_change_time = pdb_get_pass_must_change_time(sampass);
	pass_last_set_time = pdb_get_pass_last_set_time(sampass);


	username = pdb_get_username(sampass);
	if (username) username_len = strlen(username) +1;
	else username_len = 0;
	domain = pdb_get_domain(sampass);
	if (domain) domain_len = strlen(domain) +1;
	else domain_len = 0;
	nt_username = pdb_get_nt_username(sampass);
	if (nt_username) nt_username_len = strlen(nt_username) +1;
	else nt_username_len = 0;
	dir_drive = pdb_get_dirdrive(sampass);
	if (dir_drive) dir_drive_len = strlen(dir_drive) +1;
	else dir_drive_len = 0;
	unknown_str = NULL;
	unknown_str_len = 0;
	munged_dial = pdb_get_munged_dial(sampass);
	if (munged_dial) munged_dial_len = strlen(munged_dial) +1;
	else munged_dial_len = 0;
		
	fullname = pdb_get_fullname(sampass);
	if (fullname) fullname_len = strlen(fullname) +1;
	else fullname_len = 0;
	homedir = pdb_get_homedir(sampass);
	if (homedir) homedir_len = strlen(homedir) +1;
	else homedir_len = 0;
	logon_script = pdb_get_logon_script(sampass);
	if (logon_script) logon_script_len = strlen(logon_script) +1;
	else logon_script_len = 0;
	profile_path = pdb_get_profile_path(sampass);
	if (profile_path) profile_path_len = strlen(profile_path) +1;
	else profile_path_len = 0;
	acct_desc = pdb_get_acct_desc(sampass);
	if (acct_desc) acct_desc_len = strlen(acct_desc) +1;
	else acct_desc_len = 0;
	workstations = pdb_get_workstations(sampass);
	if (workstations) workstations_len = strlen(workstations) +1;
	else workstations_len = 0;
	
	lm_pw = pdb_get_lanman_passwd(sampass);
	if (!lm_pw) lm_pw_len = 0;
	
	nt_pw = pdb_get_nt_passwd(sampass);
	if (!nt_pw) nt_pw_len = 0;
		
	/* one time to get the size needed */
	len = tdb_pack(NULL, 0,  TDB_FORMAT_STRING,
		logon_time,
		logoff_time,
		kickoff_time,
		pass_last_set_time,
		pass_can_change_time,
		pass_must_change_time,
		username_len, username,
		domain_len, domain,
		nt_username_len, nt_username,
		fullname_len, fullname,
		homedir_len, homedir,
		dir_drive_len, dir_drive,
		logon_script_len, logon_script,
		profile_path_len, profile_path,
		acct_desc_len, acct_desc,
		workstations_len, workstations,
		unknown_str_len, unknown_str,
		munged_dial_len, munged_dial,
		pdb_get_user_rid(sampass),
		pdb_get_group_rid(sampass),
		lm_pw_len, lm_pw,
		nt_pw_len, nt_pw,
		pdb_get_acct_ctrl(sampass),
		pdb_get_unknown3(sampass),
		pdb_get_logon_divs(sampass),
		pdb_get_hours_len(sampass),
		MAX_HOURS_LEN, pdb_get_hours(sampass),
		pdb_get_unknown5(sampass),
		pdb_get_unknown6(sampass));


	/* malloc the space needed */
	if ( (*buf=(uint8*)malloc(len)) == NULL)
	{
		DEBUG(0,("init_buffer_from_sam: Unable to malloc() memory for buffer!\n"));
		return (-1);
	}
	
	/* now for the real call to tdb_pack() */
	buflen = tdb_pack(*buf, len,  TDB_FORMAT_STRING,
		logon_time,
		logoff_time,
		kickoff_time,
		pass_last_set_time,
		pass_can_change_time,
		pass_must_change_time,
		username_len, username,
		domain_len, domain,
		nt_username_len, nt_username,
		fullname_len, fullname,
		homedir_len, homedir,
		dir_drive_len, dir_drive,
		logon_script_len, logon_script,
		profile_path_len, profile_path,
		acct_desc_len, acct_desc,
		workstations_len, workstations,
		unknown_str_len, unknown_str,
		munged_dial_len, munged_dial,
		pdb_get_user_rid(sampass),
		pdb_get_group_rid(sampass),
		lm_pw_len, lm_pw,
		nt_pw_len, nt_pw,
		pdb_get_acct_ctrl(sampass),
		pdb_get_unknown3(sampass),
		pdb_get_logon_divs(sampass),
		pdb_get_hours_len(sampass),
		MAX_HOURS_LEN, pdb_get_hours(sampass),
		pdb_get_unknown5(sampass),
		pdb_get_unknown6(sampass));
	
	
	/* check to make sure we got it correct */
	if (buflen != len)
	{
		/* error */
		free (*buf);
		return (-1);
	}

	return (buflen);
}

/***************************************************************
 Open the TDB passwd database for SAM account enumeration.
****************************************************************/
BOOL pdb_setsampwent(BOOL update)
{
	pstring		tdbfile;
	
	pstrcpy (tdbfile, lp_private_dir());
	pstrcat (tdbfile, PASSDB_FILE_NAME);
	
	/* Open tdb passwd */
	if (!(global_tdb_ent.passwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, update ? O_RDWR : O_RDONLY, 0600)))
	{
		DEBUG(0, ("Unable to open TDB passwd, trying create new!\n"));
		if (!(global_tdb_ent.passwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDWR | O_CREAT | O_EXCL, 0600)))
		{
			DEBUG(0, ("Unable to create TDB passwd (passdb.tdb) !!!"));
			return False;
		}
	}
	
	global_tdb_ent.key = tdb_firstkey(global_tdb_ent.passwd_tdb);

	return True;
}

/***************************************************************
 End enumeration of the TDB passwd list.
****************************************************************/
void pdb_endsampwent(void)
{
	if (global_tdb_ent.passwd_tdb)
	{
		tdb_close(global_tdb_ent.passwd_tdb);
		global_tdb_ent.passwd_tdb = NULL;
	}
	
	DEBUG(7, ("endtdbpwent: closed password file.\n"));
}


/*****************************************************************
 Get one SAM_ACCOUNT from the TDB (next in line)
*****************************************************************/
BOOL pdb_getsampwent(SAM_ACCOUNT *user)
{
	TDB_DATA 	data;
	struct passwd	*pw;
	uid_t		uid;
	gid_t		gid;
	char *prefix = USERPREFIX;
	int  prefixlen = strlen (prefix);

	if (user==NULL) {
		DEBUG(0,("pdb_get_sampwent: SAM_ACCOUNT is NULL.\n"));
		return False;
	}

	/* skip all RID entries */
	while ((global_tdb_ent.key.dsize != 0) && (strncmp (global_tdb_ent.key.dptr, prefix, prefixlen)))
		/* increment to next in line */
		global_tdb_ent.key = tdb_nextkey (global_tdb_ent.passwd_tdb, global_tdb_ent.key);

	/* do we have an valid interation pointer? */
	if(global_tdb_ent.passwd_tdb == NULL) 
	{
		DEBUG(0,("pdb_get_sampwent: Bad TDB Context pointer.\n"));
		return False;
	}

	data = tdb_fetch (global_tdb_ent.passwd_tdb, global_tdb_ent.key);
	if (!data.dptr)
	{
		DEBUG(5,("pdb_getsampwent: database entry not found.\n"));
		return False;
	}
  
  	/* unpack the buffer */
	if (!init_sam_from_buffer (user, data.dptr, data.dsize))
	{
		DEBUG(0,("pdb_getsampwent: Bad SAM_ACCOUNT entry returned from TDB!\n"));
		return False;
	}
	
	/* validate the account and fill in UNIX uid and gid.  sys_getpwnam()
	   is used instaed of Get_Pwnam() as we do not need to try case
	   permutations */
	if ((pw=sys_getpwnam(pdb_get_username(user))) == NULL)
	{
		DEBUG(0,("pdb_getsampwent: getpwnam(%s) return NULL.  User does not exist!\n", 
		          pdb_get_username(user)));
		return False;
	}

	uid = pw->pw_uid;
	gid = pw->pw_gid;
	pdb_set_uid (user, uid);
	pdb_set_gid (user, gid);

	/* 21 days from present */
	pdb_set_pass_must_change_time(user, time(NULL)+1814400);	

	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_logon_script(user));
	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_profile_path(user));
	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_homedir(user));

	/* increment to next in line */
	global_tdb_ent.key = tdb_nextkey (global_tdb_ent.passwd_tdb, global_tdb_ent.key);

	return True;
}

/******************************************************************
 Lookup a name in the SAM TDB
******************************************************************/
BOOL pdb_getsampwnam (SAM_ACCOUNT *user, char *sname)
{
	TDB_CONTEXT 	*pwd_tdb;
	TDB_DATA 	data, key;
	fstring 	keystr;
	struct passwd	*pw;
	pstring		tdbfile;
	fstring		name;
	uid_t		uid;
	gid_t		gid;


	if (user==NULL) {
		DEBUG(0,("pdb_getsampwnam: SAM_ACCOUNT is NULL.\n"));
		return False;
	}

	fstrcpy (name, sname);
	strlower (name);
	pstrcpy (tdbfile, lp_private_dir());
	pstrcat (tdbfile, PASSDB_FILE_NAME);
	
	/* set search key */
	slprintf(keystr, sizeof(keystr)-1, "%s%s", USERPREFIX, name);
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;

	/* open the accounts TDB */
	if (!(pwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDONLY, 0600)))
	{
		DEBUG(0, ("pdb_getsampwnam: Unable to open TDB passwd!\n"));
		return False;
	}

	/* get the record */
	data = tdb_fetch (pwd_tdb, key);
	if (!data.dptr)
	{
		DEBUG(5,("pdb_getsampwnam (TDB): error fetching database.\n"));
		DEBUGADD(5, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close (pwd_tdb);
		return False;
	}
  
  	/* unpack the buffer */
	if (!init_sam_from_buffer (user, data.dptr, data.dsize))
	{
		DEBUG(0,("pdb_getsampwent: Bad SAM_ACCOUNT entry returned from TDB!\n"));
		return False;
	}
	
	/* validate the account and fill in UNIX uid and gid.  sys_getpwnam()
	   is used instaed of Get_Pwnam() as we do not need to try case
	   permutations */
	if ((pw=sys_getpwnam(pdb_get_username(user))) == NULL)
	{
		DEBUG(0,("pdb_getsampwent: getpwnam(%s) return NULL.  User does not exist!\n", 
		          pdb_get_username(user)));
		return False;
	}
	
	uid = pw->pw_uid;
	gid = pw->pw_gid;
	pdb_set_uid (user, uid);
	pdb_set_gid (user, gid);
	
	/* 21 days from present */
	pdb_set_pass_must_change_time(user, time(NULL)+1814400);	
	
	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_logon_script(user));
	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_profile_path(user));
	standard_sub_advanced(-1, pdb_get_username(user), "", gid, pdb_get_homedir(user));

	/* cleanup */
	tdb_close (pwd_tdb);

	return True;
}

/***************************************************************************
 Search by uid
 **************************************************************************/
BOOL pdb_getsampwuid (SAM_ACCOUNT* user, uid_t uid)
{
	struct passwd	*pw;
	fstring		name;

	if (user==NULL) {
		DEBUG(0,("pdb_getsampwuid: SAM_ACCOUNT is NULL.\n"));
		return False;
	}

	pw = sys_getpwuid(uid);
	if (pw == NULL)
	{
		DEBUG(0,("pdb_getsampwuid: getpwuid(%d) return NULL. User does not exist!\n", uid));
		return False;
	}
	fstrcpy (name, pw->pw_name);

	return pdb_getsampwnam (user, name);

}

/***************************************************************************
 Search by rid
 **************************************************************************/
BOOL pdb_getsampwrid (SAM_ACCOUNT *user, uint32 rid)
{
	TDB_CONTEXT 		*pwd_tdb;
	TDB_DATA 		data, key;
	fstring 		keystr;
	pstring			tdbfile;
	fstring			name;
	
	if (user==NULL) {
		DEBUG(0,("pdb_getsampwrid: SAM_ACCOUNT is NULL.\n"));
		return False;
	}

	pstrcpy (tdbfile, lp_private_dir());
	pstrcat (tdbfile, PASSDB_FILE_NAME);
	
	/* set search key */
	slprintf(keystr, sizeof(keystr)-1, "%s%.8x", RIDPREFIX, rid);
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;

	/* open the accounts TDB */
	if (!(pwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDONLY, 0600)))
	{
		DEBUG(0, ("pdb_getsampwrid: Unable to open TDB rid database!\n"));
		return False;
	}

	/* get the record */
	data = tdb_fetch (pwd_tdb, key);
	if (!data.dptr)
	{
		DEBUG(5,("pdb_getsampwrid (TDB): error fetching database.\n"));
		DEBUGADD(5, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close (pwd_tdb);
		return False;
	}

	fstrcpy (name, data.dptr);
	
	tdb_close (pwd_tdb);
	
	return pdb_getsampwnam (user, name);
}


/***************************************************************************
 Delete a SAM_ACCOUNT
****************************************************************************/
BOOL pdb_delete_sam_account(char *sname)
{
	struct passwd  *pwd = NULL;
	SAM_ACCOUNT	*sam_pass = NULL;
	TDB_CONTEXT 	*pwd_tdb;
	TDB_DATA 	key, data;
	fstring 	keystr;
	pstring		tdbfile;
	uint32		rid;
	fstring		name;
	
	fstrcpy (name, sname);
	strlower (name);
	
	pstrcpy (tdbfile, lp_private_dir());
	pstrcat (tdbfile, PASSDB_FILE_NAME);

	/* open the TDB */
	if (!(pwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDWR, 0600)))
	{
		DEBUG(0, ("Unable to open TDB passwd!"));
		return False;
	}
  
  	/* set the search key */
	slprintf(keystr, sizeof(keystr)-1, "%s%s", USERPREFIX, name);
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;
	
	/* get the record */
	data = tdb_fetch (pwd_tdb, key);
	if (!data.dptr)
	{
		DEBUG(5,("pdb_delete_sam_account (TDB): error fetching database.\n"));
		DEBUGADD(5, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close (pwd_tdb);
		return False;
	}
  
  	/* unpack the buffer */
	if (!pdb_init_sam (&sam_pass))
	{
		tdb_close (pwd_tdb);
		return False;
	}
	
	if (!init_sam_from_buffer (sam_pass, data.dptr, data.dsize))
	{
		DEBUG(0,("pdb_getsampwent: Bad SAM_ACCOUNT entry returned from TDB!\n"));
		tdb_close (pwd_tdb);
		return False;
	}

	pwd = sys_getpwnam(sam_pass->username);
	
	pdb_free_sam (sam_pass);
	
	rid = pdb_uid_to_user_rid (pwd->pw_uid);

	/* it's outaa here!  8^) */
	if (tdb_delete(pwd_tdb, key) != TDB_SUCCESS)
	{
		DEBUG(5, ("Error deleting entry from tdb passwd database!\n"));
		DEBUGADD(5, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close(pwd_tdb); 
		return False;
	}	

	/* delete also the RID key */

  	/* set the search key */
	slprintf(keystr, sizeof(keystr)-1, "%s%.8x", RIDPREFIX, rid);
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;

	/* it's outaa here!  8^) */
	if (tdb_delete(pwd_tdb, key) != TDB_SUCCESS)
	{
		DEBUG(5, ("Error deleting entry from tdb rid database!\n"));
		DEBUGADD(5, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close(pwd_tdb); 
		return False;
	}
	
	tdb_close(pwd_tdb);
	
	return True;
}

/***************************************************************************
 Update the TDB SAM
****************************************************************************/
static BOOL tdb_update_sam(SAM_ACCOUNT* newpwd, BOOL override, int flag)
{
	TDB_CONTEXT 	*pwd_tdb;
	TDB_DATA 	key, data;
	uint8		*buf = NULL;
	fstring 	keystr;
	pstring		tdbfile;
	fstring		name;
	int		newtdb = FALSE;
	
	pstrcpy (tdbfile, lp_private_dir());
	pstrcat (tdbfile, PASSDB_FILE_NAME);
	
	if ( (!newpwd->uid) || (!newpwd->gid) )
		DEBUG (0,("tdb_update_sam: Storing a SAM_ACCOUNT for [%s] with uid %d and gid %d!\n",
			newpwd->username, newpwd->uid, newpwd->gid));
				
	/* if we don't have a RID, then generate one */
	if (!newpwd->user_rid)
		pdb_set_user_rid (newpwd, pdb_uid_to_user_rid (newpwd->uid));
	if (!newpwd->group_rid)
		pdb_set_group_rid (newpwd, pdb_gid_to_group_rid (newpwd->gid));

	    
	/* copy the SAM_ACCOUNT struct into a BYTE buffer for storage */
	if ((data.dsize=init_buffer_from_sam (&buf, newpwd)) == -1)
	{
		DEBUG(0,("tdb_update_sam: ERROR - Unable to copy SAM_ACCOUNT info BYTE buffer!\n"));
		return False;
	}
	data.dptr = buf;

	fstrcpy (name, pdb_get_username(newpwd));
	strlower (name);
	
  	/* setup the USER index key */
	slprintf(keystr, sizeof(keystr)-1, "%s%s", USERPREFIX, name);
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;

	/* invalidate the existing TDB iterator if it is open */
	if (global_tdb_ent.passwd_tdb)
	{
		tdb_close(global_tdb_ent.passwd_tdb);
		global_tdb_ent.passwd_tdb = NULL;
	}

 	/* open the account TDB passwd*/
  	if (!(pwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDWR, 0600)))
	{
     		DEBUG(0, ("tdb_update_sam: Unable to open TDB passwd!\n"));
		if (flag == TDB_INSERT)
		{
			DEBUG(0, ("Unable to open TDB passwd, trying create new!\n"));
			if (!(pwd_tdb = tdb_open_log(tdbfile, 0, USE_TDB_MMAP_FLAG, O_RDWR | O_CREAT | O_EXCL, 0600)))
			{
				DEBUG(0, ("Unable to create TDB passwd (passdb.tdb) !!!\n"));
				return False;
			}
			newtdb = True;
		}
	}

	/* add the account */
	if (tdb_store(pwd_tdb, key, data, flag) != TDB_SUCCESS)
	{
		DEBUG(0, ("Unable to modify passwd TDB!"));
		DEBUGADD(0, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close (pwd_tdb);
		return False;
	}
	
	/* setup RID data */
	data.dsize = sizeof(fstring);
	data.dptr = name;

	/* setup the RID index key */
	slprintf(keystr, sizeof(keystr)-1, "%s%.8x", RIDPREFIX, pdb_get_user_rid(newpwd));
	key.dptr = keystr;
	key.dsize = strlen (keystr) + 1;
	
	/* add the reference */
	if (tdb_store(pwd_tdb, key, data, flag) != TDB_SUCCESS)
	{
		DEBUG(0, ("Unable to modify TDB passwd !"));
		DEBUGADD(0, (" Error: %s\n", tdb_errorstr(pwd_tdb)));
		tdb_close (pwd_tdb);
		return False;
	}
	
	/* cleanup */
	tdb_close (pwd_tdb);
	
	return (True);
}

/***************************************************************************
 Modifies an existing SAM_ACCOUNT
****************************************************************************/
BOOL pdb_update_sam_account (SAM_ACCOUNT *newpwd, BOOL override)
{
	return (tdb_update_sam(newpwd, override, TDB_MODIFY));
}

/***************************************************************************
 Adds an existing SAM_ACCOUNT
****************************************************************************/
BOOL pdb_add_sam_account (SAM_ACCOUNT *newpwd)
{
	return (tdb_update_sam(newpwd, True, TDB_INSERT));
}


#else
	/* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
	void samtdb_dummy_function(void) { } /* stop some compilers complaining */
#endif /* WITH_TDBPWD */