/* 
   Unix SMB/Netbios implementation.
   Version 2.9.
   LDAP protocol helper functions for SAMBA
   Copyright (C) Shahms King 2001
   Copyright (C) Jean François Micouleau 1998
   
   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_LDAP_SAM
/* TODO:
*  persistent connections: if using NSS LDAP, many connections are made
*      however, using only one within Samba would be nice
*  
*  Clean up SSL stuff, compile on OpenLDAP 1.x, 2.x, and Netscape SDK
*
*  Other LDAP based login attributes: accountExpires, etc.
*  (should be the domain of Samba proper, but the sam_password/SAM_ACCOUNT
*  structures don't have fields for some of these attributes)
*
*  SSL is done, but can't get the certificate based authentication to work
*  against on my test platform (Linux 2.4, OpenLDAP 2.x)
*/

/* NOTE: this will NOT work against an Active Directory server
*  due to the fact that the two password fields cannot be retrieved
*  from a server; recommend using security = domain in this situation
*  and/or winbind
*/

#include <lber.h>
#include <ldap.h>

#ifndef SAM_ACCOUNT
#define SAM_ACCOUNT struct sam_passwd
#endif

struct ldap_enum_info
{
	LDAP *ldap_struct;
	LDAPMessage *result;
	LDAPMessage *entry;
};

static struct ldap_enum_info global_ldap_ent;


/*******************************************************************
 open a connection to the ldap server.
******************************************************************/
static BOOL
ldap_open_connection (LDAP ** ldap_struct)
{
	int port;
	int version, rc;
	int tls = LDAP_OPT_X_TLS_HARD;
	
	if (lp_ldap_ssl() == LDAP_SSL_ON && lp_ldap_port() == 389) {
		port = 636;
	}
	else {
		port = lp_ldap_port();
	}

	if ((*ldap_struct = ldap_init(lp_ldap_server(), port)) == NULL)	{
		DEBUG(0, ("The LDAP server is not responding !\n"));
		return (False);
	}

	/* Connect to older servers using SSL and V2 rather than Start TLS */
	if (ldap_get_option(*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version) == LDAP_OPT_SUCCESS)
	{
		if (version != LDAP_VERSION2)
		{
			version = LDAP_VERSION2;
			ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
		}
	}

	switch (lp_ldap_ssl())
	{
		case LDAP_SSL_START_TLS:
			if (ldap_get_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION, 
				&version) == LDAP_OPT_SUCCESS)
			{
				if (version < LDAP_VERSION3)
				{
					version = LDAP_VERSION3;
					ldap_set_option (*ldap_struct, LDAP_OPT_PROTOCOL_VERSION,
							&version);
				}
			}
			if ((rc = ldap_start_tls_s (*ldap_struct, NULL, NULL)) != LDAP_SUCCESS)
			{
				DEBUG(0,
				      ("Failed to issue the StartTLS instruction: %s\n",
				       ldap_err2string(rc)));
				return False;
			}
			DEBUG (2, ("StartTLS issued: using a TLS connection\n"));
			break;
		case LDAP_SSL_ON:
			if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
			{
				DEBUG(0, ("Failed to setup a TLS session\n"));
			}
			break;
		case LDAP_SSL_OFF:
		default:
	}

	DEBUG(2, ("ldap_open_connection: connection opened\n"));
	return (True);
}

/*******************************************************************
 connect to the ldap server under system privilege.
******************************************************************/
static BOOL ldap_connect_system(LDAP * ldap_struct)
{
	int rc;
	static BOOL got_pw = False;
	static pstring ldap_secret;

	/* get the password if we don't have it already */
	if (!got_pw && !(got_pw=fetch_ldap_pw(lp_ldap_admin_dn(), ldap_secret, sizeof(pstring)))) 
	{
		DEBUG(0, ("ldap_connect_system: Failed to retrieve password for %s from secrets.tdb\n",
			lp_ldap_admin_dn()));
		return False;
	}

	/* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite 
	   (OpenLDAP) doesnt' seem to support it */
	if ((rc = ldap_simple_bind_s(ldap_struct, lp_ldap_admin_dn(), 
		ldap_secret)) != LDAP_SUCCESS)
	{
		DEBUG(0, ("Bind failed: %s\n", ldap_err2string(rc)));
		return (False);
	}
	
	DEBUG(2, ("ldap_connect_system: succesful connection to the LDAP server\n"));
	return (True);
}

/*******************************************************************
 run the search by name.
******************************************************************/
static int ldap_search_one_user (LDAP * ldap_struct, const char *filter, LDAPMessage ** result)
{
	int scope = LDAP_SCOPE_SUBTREE;
	int rc;

	DEBUG(2, ("ldap_search_one_user: searching for:[%s]\n", filter));

	rc = ldap_search_s (ldap_struct, lp_ldap_suffix (), scope, 
		filter, NULL, 0, result);

	if (rc != LDAP_SUCCESS)	{
		DEBUG(0,("ldap_search_one_user: Problem during the LDAP search: %s\n", 
			ldap_err2string (rc)));
		DEBUG(3,("ldap_search_one_user: Query was: %s, %s\n", lp_ldap_suffix(), 
			filter));
	}
	return (rc);
}

/*******************************************************************
 run the search by name.
******************************************************************/
static int ldap_search_one_user_by_name (LDAP * ldap_struct, const char *user,
			     LDAPMessage ** result)
{
	pstring filter;
	
	/*
	   in the filter expression, replace %u with the real name
	   so in ldap filter, %u MUST exist :-)
	 */
	pstrcpy(filter, lp_ldap_filter());

	/* have to use this here because $ is filtered out
	   * in pstring_sub
	 */
	all_string_sub(filter, "%u", user, sizeof(pstring));

	return ldap_search_one_user(ldap_struct, filter, result);
}

/*******************************************************************
 run the search by uid.
******************************************************************/
static int ldap_search_one_user_by_uid(LDAP * ldap_struct, int uid,
			    LDAPMessage ** result)
{
	struct passwd *user;
	pstring filter;

	/* Get the username from the system and look that up in the LDAP */
	user = sys_getpwuid(uid);
	pstrcpy(filter, lp_ldap_filter());
	all_string_sub(filter, "%u", user->pw_name, sizeof(pstring));

	return ldap_search_one_user(ldap_struct, filter, result);
}

/*******************************************************************
 run the search by rid.
******************************************************************/
static int ldap_search_one_user_by_rid (LDAP * ldap_struct, uint32 rid,
			    LDAPMessage ** result)
{
	pstring filter;
	int rc;

	/* check if the user rid exsists, if not, try searching on the uid */
	snprintf(filter, sizeof(filter) - 1, "rid=%i", rid);
	rc = ldap_search_one_user(ldap_struct, filter, result);
	
	if (rc != LDAP_SUCCESS)
		rc = ldap_search_one_user_by_uid(ldap_struct, 
			pdb_user_rid_to_uid(rid), result);

	return rc;
}

/*******************************************************************
search an attribute and return the first value found.
******************************************************************/
static void get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
		     char *attribute, char *value)
{
	char **valeurs;

	if ((valeurs = ldap_get_values (ldap_struct, entry, attribute)) != NULL) {
		pstrcpy(value, valeurs[0]);
		ldap_value_free(valeurs);
		DEBUG (2, ("get_single_attribute: [%s] = [%s]\n", attribute, value));
	}
	else {
		value = NULL;
		DEBUG (2, ("get_single_attribute: [%s] = [NULL]\n", attribute));
	}
}

/************************************************************************
Routine to manage the LDAPMod structure array
manage memory used by the array, by each struct, and values

************************************************************************/
static void make_a_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
{
	LDAPMod **mods;
	int i;
	int j;

	mods = *modlist;

	if (attribute == NULL || *attribute == '\0')
		return;

	if (value == NULL || *value == '\0')
		return;

	if (mods == NULL) 
	{
		mods = (LDAPMod **) malloc(sizeof(LDAPMod *));
		if (mods == NULL)
		{
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[0] = NULL;
	}

	for (i = 0; mods[i] != NULL; ++i) {
		if (mods[i]->mod_op == modop && !strcasecmp(mods[i]->mod_type, attribute))
			break;
	}

	if (mods[i] == NULL)
	{
		mods = (LDAPMod **) realloc (mods, (i + 2) * sizeof (LDAPMod *));
		if (mods == NULL)
		{
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[i] = (LDAPMod *) malloc(sizeof(LDAPMod));
		if (mods[i] == NULL)
		{
			DEBUG(0, ("make_a_mod: out of memory!\n"));
			return;
		}
		mods[i]->mod_op = modop;
		mods[i]->mod_values = NULL;
		mods[i]->mod_type = strdup(attribute);
		mods[i + 1] = NULL;
	}

	if (value != NULL)
	{
		j = 0;
		if (mods[i]->mod_values != NULL) {
			for (; mods[i]->mod_values[j] != NULL; j++);
		}
		mods[i]->mod_values = (char **)realloc(mods[i]->mod_values,
					       (j + 2) * sizeof (char *));
					       
		if (mods[i]->mod_values == NULL) {
			DEBUG (0, ("make_a_mod: Memory allocation failure!\n"));
			return;
		}
		mods[i]->mod_values[j] = strdup(value);
		mods[i]->mod_values[j + 1] = NULL;
	}
	*modlist = mods;
}

/* New Interface is being implemented here */

/**********************************************************************
Initialize SAM_ACCOUNT from an LDAP query
(Based on init_sam_from_buffer in pdb_tdb.c)
*********************************************************************/
static BOOL init_sam_from_ldap (SAM_ACCOUNT * sampass,
		   LDAP * ldap_struct, LDAPMessage * entry)
{
	time_t  logon_time,
			logoff_time,
			kickoff_time,
			pass_last_set_time, 
			pass_can_change_time, 
			pass_must_change_time;
	static pstring username;
	static pstring domain;
	static pstring nt_username;
	static pstring fullname;
	static pstring homedir;
	static pstring dir_drive;
	static pstring logon_script;
	static pstring profile_path;
	static pstring acct_desc;
	static pstring munged_dial;
	static pstring workstations;
	struct passwd *sys_user;
	uint32 user_rid, group_rid;
	static uint8 smblmpwd[16];
	static uint8 smbntpwd[16];
	uint16 acct_ctrl, logon_divs;
	uint32 hours_len;
	uint8 *hours;
	pstring temp;

	get_single_attribute(ldap_struct, entry, "uid", username);
	DEBUG(2, ("Entry found for user: %s\n", username));

	pstrcpy(nt_username, username);

	get_single_attribute(ldap_struct, entry, "sambaDomain", domain);
	if (!domain)
		pstrcpy(domain, lp_workgroup());

	get_single_attribute(ldap_struct, entry, "pwdLastSet", temp);
	pass_last_set_time = (time_t) strtol(temp, NULL, 16);

	get_single_attribute(ldap_struct, entry, "logonTime", temp);
	logon_time = (time_t) strtol(temp, NULL, 16);

	get_single_attribute(ldap_struct, entry, "logoffTime", temp);
	logoff_time = (time_t) strtol(temp, NULL, 16);

	get_single_attribute(ldap_struct, entry, "kickoffTime", temp);
	kickoff_time = (time_t) strtol(temp, NULL, 16);

	get_single_attribute(ldap_struct, entry, "pwdCanChange", temp);
	pass_can_change_time = (time_t) strtol(temp, NULL, 16);

	get_single_attribute(ldap_struct, entry, "pwdMustChange", temp);
	pass_must_change_time = (time_t) strtol(temp, NULL, 16);

	/* recommend that 'gecos' and 'displayName' should refer to the same
	   * attribute OID.  userFullName depreciated, only used by Samba
	   * primary rules of LDAP: don't make a new attribute when one is already defined
	   * that fits your needs; using gecos then displayName then cn rather than 'userFullName'
	 */

	get_single_attribute(ldap_struct, entry, "gecos", fullname);

	if (!fullname) {
		get_single_attribute(ldap_struct, entry, "displayName", fullname);
		get_single_attribute(ldap_struct, entry, "cn", fullname);
	}

	get_single_attribute(ldap_struct, entry, "homeDrive", dir_drive);
	DEBUG(5,("homeDrive is set to %s\n",dir_drive));
	if (!*dir_drive) {
		pstrcpy(dir_drive, lp_logon_drive());
		DEBUG(5,("homeDrive fell back to %s\n",dir_drive));
	}

	get_single_attribute(ldap_struct, entry, "smbHome", homedir);
	DEBUG(5,("smbHome is set to %s\n",homedir));
	if (!*homedir) {
		pstrcpy(homedir, lp_logon_home());
		DEBUG(5,("smbHome fell back to %s\n",homedir));
	}

	get_single_attribute(ldap_struct, entry, "scriptPath", logon_script);
	DEBUG(5,("scriptPath is set to %s\n",logon_script));
	if (!*logon_script) {
		pstrcpy(logon_script, lp_logon_script());
		DEBUG(5,("scriptPath fell back to %s\n",logon_script));
	}

	get_single_attribute(ldap_struct, entry, "profilePath", profile_path);
	DEBUG(5,("profilePath is set to %s\n",profile_path));
	if (!*profile_path) {
		pstrcpy(profile_path, lp_logon_path());
		DEBUG(5,("profilePath fell back to %s\n",profile_path));
	}

	get_single_attribute(ldap_struct, entry, "description", acct_desc);
	get_single_attribute(ldap_struct, entry, "userWorkstations", workstations);
	get_single_attribute(ldap_struct, entry, "rid", temp);
	user_rid = (uint32)strtol(temp, NULL, 10);
	get_single_attribute(ldap_struct, entry, "primaryGroupID", temp);
	group_rid = (uint32)strtol(temp, NULL, 10);


	/* These values MAY be in LDAP, but they can also be retrieved through 
	   *  sys_getpw*() which is how we're doing it (if you use nss_ldap, then 
	   *  these values will be stored in LDAP as well, but if not, we want the
	   *  local values to override the LDAP for this anyway 
	   *  homeDirectory attribute
	 */
	sys_user = sys_getpwnam(username);
	if (sys_user == NULL)
		return False;


	/* FIXME: hours stuff should be cleaner */
	logon_divs = 168;
	hours_len = 21;
	hours = malloc(sizeof(hours) * hours_len);
	memset(hours, 0xff, hours_len);

	get_single_attribute (ldap_struct, entry, "lmPassword", temp);
	pdb_gethexpwd(temp, smblmpwd);
	memset((char *)temp, '\0', sizeof(temp));
	get_single_attribute (ldap_struct, entry, "ntPassword", temp);
	pdb_gethexpwd(temp, smbntpwd);
	memset((char *)temp, '\0', sizeof(temp));
	get_single_attribute (ldap_struct, entry, "acctFlags", temp);
	acct_ctrl = pdb_decode_acct_ctrl(temp);

	if (acct_ctrl == 0)
		acct_ctrl |= ACB_NORMAL;


	pdb_set_acct_ctrl(sampass, acct_ctrl);
	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_hours_len(sampass, hours_len);
	pdb_set_logons_divs(sampass, logon_divs);

	pdb_set_uid(sampass, &sys_user->pw_uid);
	pdb_set_gid(sampass, &sys_user->pw_gid);
	pdb_set_user_rid(sampass, user_rid);
	pdb_set_group_rid(sampass, group_rid);

	pdb_set_username(sampass, username);

	pdb_set_domain(sampass, domain);
	pdb_set_nt_username(sampass, nt_username);

	pdb_set_fullname(sampass, fullname);

	pdb_set_logon_script(sampass, logon_script);
	pdb_set_profile_path(sampass, profile_path);
	pdb_set_dir_drive(sampass, dir_drive);
	pdb_set_homedir(sampass, homedir);
	pdb_set_acct_desc(sampass, acct_desc);
	pdb_set_workstations(sampass, workstations);
	pdb_set_munged_dial(sampass, munged_dial);
	if (!pdb_set_nt_passwd(sampass, smbntpwd))
		return False;
	if (!pdb_set_lanman_passwd(sampass, smblmpwd))
		return False;

	/* pdb_set_unknown_3(sampass, unknown3); */
	/* pdb_set_unknown_5(sampass, unknown5); */
	/* pdb_set_unknown_6(sampass, unknown6); */

	pdb_set_hours(sampass, hours);

	return True;
}

/**********************************************************************
Initialize SAM_ACCOUNT from an LDAP query
(Based on init_buffer_from_sam in pdb_tdb.c)
*********************************************************************/
static BOOL init_ldap_from_sam (LDAPMod *** mods, int ldap_state, const SAM_ACCOUNT * sampass)
{
	pstring temp;

	*mods = NULL;

	/* 
	 * took out adding "objectclass: sambaAccount"
	 * do this on a per-mod basis
	 */


	make_a_mod(mods, ldap_state, "uid", pdb_get_username(sampass));
	DEBUG(2, ("Setting entry for user: %s\n", pdb_get_username(sampass)));

	/* not sure about using this for the nt_username */
	make_a_mod(mods, ldap_state, "sambaDomain", pdb_get_domain(sampass));

	slprintf(temp, sizeof(temp) - 1, "%i", pdb_get_uid(sampass));
	make_a_mod(mods, ldap_state, "uidNumber", temp);

	slprintf (temp, sizeof (temp) - 1, "%li", pdb_get_pass_last_set_time(sampass));
	make_a_mod(mods, ldap_state, "pwdLastSet", temp);

	slprintf(temp, sizeof(temp) - 1, "%li", pdb_get_logon_time(sampass));
	make_a_mod(mods, ldap_state, "logonTime", temp);

	slprintf(temp, sizeof(temp) - 1, "%li", pdb_get_logoff_time(sampass));
	make_a_mod(mods, ldap_state, "logoffTime", temp);

	slprintf (temp, sizeof (temp) - 1, "%li", pdb_get_kickoff_time(sampass));
	make_a_mod(mods, ldap_state, "kickoffTime", temp);

	slprintf (temp, sizeof (temp) - 1, "%li", pdb_get_pass_can_change_time(sampass));
	make_a_mod(mods, ldap_state, "pwdCanChange", temp);

	slprintf (temp, sizeof (temp) - 1, "%li", pdb_get_pass_must_change_time(sampass));
	make_a_mod(mods, ldap_state, "pwdMustChange", temp);

	/* displayName, cn, and gecos should all be the same
	   *  most easily accomplished by giving them the same OID
	   *  gecos isn't set here b/c it should be handled by the 
	   *  add-user script
	 */

	make_a_mod(mods, ldap_state, "displayName", pdb_get_fullname(sampass));
	make_a_mod(mods, ldap_state, "cn", pdb_get_fullname(sampass));

	make_a_mod(mods, ldap_state, "smbHome", pdb_get_homedir(sampass));
	make_a_mod(mods, ldap_state, "homeDrive", pdb_get_dirdrive(sampass));
	make_a_mod(mods, ldap_state, "scriptPath", pdb_get_logon_script(sampass));
	make_a_mod(mods, ldap_state, "profilePath", pdb_get_profile_path(sampass));
	make_a_mod(mods, ldap_state, "description", pdb_get_acct_desc(sampass));
	make_a_mod(mods, ldap_state, "userWorkstations", pdb_get_workstations(sampass));

	if ( !sampass->user_rid)
               sampass->user_rid = pdb_uid_to_user_rid(pdb_get_uid(sampass));
	slprintf(temp, sizeof(temp) - 1, "%i", sampass->user_rid);
	make_a_mod(mods, ldap_state, "rid", temp);

	if ( !sampass->group_rid) {
		GROUP_MAP map;
	
		if (get_group_map_from_gid(pdb_get_gid(sampass), &map, MAPPING_WITHOUT_PRIV)) {
			sid_peek_rid(&map.sid, &sampass->group_rid);
		}
		else 
			sampass->group_rid = pdb_gid_to_group_rid(pdb_get_gid(sampass));
	}

	slprintf(temp, sizeof(temp) - 1, "%i", sampass->group_rid);
	make_a_mod(mods, ldap_state, "primaryGroupID", temp);

	/* FIXME: Hours stuff goes in LDAP  */
	pdb_sethexpwd (temp, pdb_get_lanman_passwd(sampass), pdb_get_acct_ctrl(sampass));
	make_a_mod (mods, ldap_state, "lmPassword", temp);
	pdb_sethexpwd (temp, pdb_get_nt_passwd(sampass), pdb_get_acct_ctrl(sampass));
	make_a_mod (mods, ldap_state, "ntPassword", temp);
	make_a_mod (mods, ldap_state, "acctFlags", pdb_encode_acct_ctrl (pdb_get_acct_ctrl(sampass),
		NEW_PW_FORMAT_SPACE_PADDED_LEN));

	return True;
}

/**********************************************************************
Connect to LDAP server for password enumeration
*********************************************************************/
BOOL pdb_setsampwent(BOOL update)
{
	int rc;
	pstring filter;

	if (!ldap_open_connection(&global_ldap_ent.ldap_struct))
	{
		return False;
	}
	if (!ldap_connect_system(global_ldap_ent.ldap_struct))
	{
		ldap_unbind(global_ldap_ent.ldap_struct);
		return False;
	}

	pstrcpy(filter, lp_ldap_filter());
	all_string_sub(filter, "%u", "*", sizeof(pstring));

	rc = ldap_search_s(global_ldap_ent.ldap_struct, lp_ldap_suffix(),
			   LDAP_SCOPE_SUBTREE, filter, NULL, 0,
			   &global_ldap_ent.result);

	if (rc != LDAP_SUCCESS)
	{
		DEBUG(0, ("LDAP search failed: %s\n", ldap_err2string(rc)));
		DEBUG(3, ("Query was: %s, %s\n", lp_ldap_suffix(), filter));
		ldap_msgfree(global_ldap_ent.result);
		ldap_unbind(global_ldap_ent.ldap_struct);
		global_ldap_ent.ldap_struct = NULL;
		global_ldap_ent.result = NULL;
		return False;
	}

	DEBUG(2, ("pdb_setsampwent: %d entries in the base!\n",
		ldap_count_entries(global_ldap_ent.ldap_struct,
		global_ldap_ent.result)));

	global_ldap_ent.entry = ldap_first_entry(global_ldap_ent.ldap_struct,
				 global_ldap_ent.result);

	return True;
}

/**********************************************************************
End enumeration of the LDAP password list 
*********************************************************************/
void pdb_endsampwent(void)
{
	if (global_ldap_ent.ldap_struct && global_ldap_ent.result)
	{
		ldap_msgfree(global_ldap_ent.result);
		ldap_unbind(global_ldap_ent.ldap_struct);
		global_ldap_ent.ldap_struct = NULL;
		global_ldap_ent.result = NULL;
	}
}

/**********************************************************************
Get the next entry in the LDAP password database 
*********************************************************************/
BOOL pdb_getsampwent(SAM_ACCOUNT * user)
{
	if (!global_ldap_ent.entry)
		return False;

	global_ldap_ent.entry =	ldap_next_entry(global_ldap_ent.ldap_struct,
				global_ldap_ent.entry);

	if (global_ldap_ent.entry != NULL)
	{
		return init_sam_from_ldap(user, global_ldap_ent.ldap_struct,
					  global_ldap_ent.entry);
	}
	return False;
}

/**********************************************************************
Get SAM_ACCOUNT entry from LDAP by username 
*********************************************************************/
BOOL pdb_getsampwnam(SAM_ACCOUNT * user, const char *sname)
{
	LDAP *ldap_struct;
	LDAPMessage *result;
	LDAPMessage *entry;

	if (!ldap_open_connection(&ldap_struct))
		return False;
	if (!ldap_connect_system(ldap_struct))
	{
		ldap_unbind(ldap_struct);
		return False;
	}
	if (ldap_search_one_user_by_name(ldap_struct, sname, &result) !=
	    LDAP_SUCCESS)
	{
		ldap_unbind(ldap_struct);
		return False;
	}
	if (ldap_count_entries(ldap_struct, result) < 1)
	{
		DEBUG(0,
		      ("We don't find this user [%s] count=%d\n", sname,
		       ldap_count_entries(ldap_struct, result)));
		ldap_unbind(ldap_struct);
		return False;
	}
	entry = ldap_first_entry(ldap_struct, result);
	if (entry)
	{
		init_sam_from_ldap(user, ldap_struct, entry);
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return True;
	}
	else
	{
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return False;
	}
}

/**********************************************************************
Get SAM_ACCOUNT entry from LDAP by rid 
*********************************************************************/
BOOL pdb_getsampwrid(SAM_ACCOUNT * user, uint32 rid)
{
	LDAP *ldap_struct;
	LDAPMessage *result;
	LDAPMessage *entry;

	if (!ldap_open_connection(&ldap_struct))
		return False;

	if (!ldap_connect_system(ldap_struct))
	{
		ldap_unbind(ldap_struct);
		return False;
	}
	if (ldap_search_one_user_by_rid(ldap_struct, rid, &result) !=
	    LDAP_SUCCESS)
	{
		ldap_unbind(ldap_struct);
		return False;
	}

	if (ldap_count_entries(ldap_struct, result) < 1)
	{
		DEBUG(0,
		      ("We don't find this rid [%i] count=%d\n", rid,
		       ldap_count_entries(ldap_struct, result)));
		ldap_unbind(ldap_struct);
		return False;
	}

	entry = ldap_first_entry(ldap_struct, result);
	if (entry)
	{
		init_sam_from_ldap(user, ldap_struct, entry);
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return True;
	}
	else
	{
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return False;
	}
}

/**********************************************************************
 Get SAM_ACCOUNT entry from LDAP by uid 
*********************************************************************/
BOOL pdb_getsampwuid(SAM_ACCOUNT * user, uid_t uid)
{
	LDAP *ldap_struct;
	LDAPMessage *result;
	LDAPMessage *entry;

	if (!ldap_open_connection(&ldap_struct))
		return False;

	if (!ldap_connect_system(ldap_struct))
	{
		ldap_unbind(ldap_struct);
		return False;
	}
	if (ldap_search_one_user_by_uid(ldap_struct, uid, &result) !=
	    LDAP_SUCCESS)
	{
		ldap_unbind(ldap_struct);
		return False;
	}

	if (ldap_count_entries(ldap_struct, result) < 1)
	{
		DEBUG(0,
		      ("We don't find this uid [%i] count=%d\n", uid,
		       ldap_count_entries(ldap_struct, result)));
		ldap_unbind(ldap_struct);
		return False;
	}
	entry = ldap_first_entry(ldap_struct, result);
	if (entry)
	{
		init_sam_from_ldap(user, ldap_struct, entry);
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return True;
	}
	else
	{
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return False;
	}
}


/**********************************************************************
Delete entry from LDAP for username 
*********************************************************************/
BOOL pdb_delete_sam_account(const char *sname)
{
	int rc;
	char *dn;
	LDAP *ldap_struct;
	LDAPMessage *entry;
	LDAPMessage *result;

	if (!ldap_open_connection (&ldap_struct))
		return False;

	DEBUG (3, ("Deleting user %s from LDAP.\n", sname));
	
	if (!ldap_connect_system (ldap_struct)) {
		ldap_unbind (ldap_struct);
		DEBUG(0, ("Failed to delete user %s from LDAP.\n", sname));
		return False;
	}

	rc = ldap_search_one_user_by_name (ldap_struct, sname, &result);
	if (ldap_count_entries (ldap_struct, result) == 0) {
		DEBUG (0, ("User doesn't exit!\n"));
		ldap_msgfree (result);
		ldap_unbind (ldap_struct);
		return False;
	}

	entry = ldap_first_entry (ldap_struct, result);
	dn = ldap_get_dn (ldap_struct, entry);

	rc = ldap_delete_s (ldap_struct, dn);

	ldap_memfree (dn);
	if (rc != LDAP_SUCCESS) {
		char *ld_error;
		ldap_get_option (ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error);
		DEBUG (0,("failed to delete user with uid = %s with: %s\n\t%s\n",
			sname, ldap_err2string (rc), ld_error));
		free (ld_error);
		ldap_unbind (ldap_struct);
		return False;
	}

	DEBUG (2,("successfully deleted uid = %s from the LDAP database\n", sname));
	ldap_unbind (ldap_struct);
	return True;
}

/**********************************************************************
Update SAM_ACCOUNT 
*********************************************************************/
BOOL pdb_update_sam_account(const SAM_ACCOUNT * newpwd, BOOL override)
{
	int rc;
	char *dn;
	LDAP *ldap_struct;
	LDAPMessage *result;
	LDAPMessage *entry;
	LDAPMod **mods;

	if (!ldap_open_connection(&ldap_struct)) /* open a connection to the server */
		return False;

	if (!ldap_connect_system(ldap_struct))	/* connect as system account */
	{
		ldap_unbind(ldap_struct);
		return False;
	}

	rc = ldap_search_one_user_by_name(ldap_struct,
					  pdb_get_username(newpwd), &result);

	if (ldap_count_entries(ldap_struct, result) == 0)
	{
		DEBUG(0, ("No user to modify!\n"));
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return False;
	}

	init_ldap_from_sam(&mods, LDAP_MOD_REPLACE, newpwd);

	entry = ldap_first_entry(ldap_struct, result);
	dn = ldap_get_dn(ldap_struct, entry);

	rc = ldap_modify_s(ldap_struct, dn, mods);

	if (rc != LDAP_SUCCESS)
	{
		char *ld_error;
		ldap_get_option(ldap_struct, LDAP_OPT_ERROR_STRING,
				&ld_error);
		DEBUG(0,
		      ("failed to modify user with uid = %s with: %s\n\t%s\n",
		       pdb_get_username(newpwd), ldap_err2string(rc),
		       ld_error));
		free(ld_error);
		ldap_unbind(ldap_struct);
		return False;
	}

	DEBUG(2,
	      ("successfully modified uid = %s in the LDAP database\n",
	       pdb_get_username(newpwd)));
	ldap_mods_free(mods, 1);
	ldap_unbind(ldap_struct);
	return True;
}

/**********************************************************************
Add SAM_ACCOUNT to LDAP 
*********************************************************************/
BOOL pdb_add_sam_account(const SAM_ACCOUNT * newpwd)
{
	int rc;
	pstring filter;
	LDAP *ldap_struct;
	LDAPMessage *result;
	pstring dn;
	LDAPMod **mods;
	int ldap_op = LDAP_MOD_ADD;

	if (!ldap_open_connection(&ldap_struct))	/* open a connection to the server */
	{
		return False;
	}

	if (!ldap_connect_system(ldap_struct))	/* connect as system account */
	{
		ldap_unbind(ldap_struct);
		return False;
	}

	if (pdb_get_username(newpwd) != NULL) {
		slprintf (dn, sizeof (dn) - 1, "uid=%s,%s", 
			pdb_get_username(newpwd), lp_ldap_suffix ());
	}
	else
	{
		return False;
	}


	rc = ldap_search_one_user_by_name (ldap_struct, pdb_get_username(newpwd), &result);

	if (ldap_count_entries(ldap_struct, result) != 0)
	{
		DEBUG(0,("User already in the base, with samba properties\n"));
		ldap_msgfree(result);
		ldap_unbind(ldap_struct);
		return False;
	}
	ldap_msgfree(result);

	slprintf (filter, sizeof (filter) - 1, "uid=%s", pdb_get_username(newpwd));
	rc = ldap_search_one_user(ldap_struct, filter, &result);
	if (ldap_count_entries(ldap_struct, result) == 1)
	{
		char *tmp;
		LDAPMessage *entry;
		DEBUG(3,("User exists without samba properties: adding them\n"));
		ldap_op = LDAP_MOD_REPLACE;
		entry = ldap_first_entry (ldap_struct, result);
		tmp = ldap_get_dn (ldap_struct, entry);
		slprintf (dn, sizeof (dn) - 1, "%s", tmp);
		ldap_memfree (tmp);
	}
	else
	{
		DEBUG (3, ("More than one user with that uid exists: bailing out!\n"));
		return False;
	}

	ldap_msgfree(result);

	init_ldap_from_sam(&mods, ldap_op, newpwd);
	make_a_mod(&mods, LDAP_MOD_ADD, "objectclass", "sambaAccount");

	if (ldap_op == LDAP_MOD_REPLACE) {
		rc = ldap_modify_s(ldap_struct, dn, mods);
	}
	else {
		rc = ldap_add_s(ldap_struct, dn, mods);
	}

	if (rc != LDAP_SUCCESS)
	{
		char *ld_error;

		ldap_get_option (ldap_struct, LDAP_OPT_ERROR_STRING, &ld_error);
		DEBUG(0,("failed to modify user with uid = %s with: %s\n\t%s\n",
			pdb_get_username(newpwd), ldap_err2string (rc), ld_error));
		free(ld_error);
		ldap_mods_free(mods, 1);
		ldap_unbind(ldap_struct);
		return False;
	}
	
	DEBUG(2,("added: uid = %s in the LDAP database\n", pdb_get_username(newpwd)));
	ldap_mods_free(mods, 1);
	ldap_unbind(ldap_struct);
	return True;
}

#else
void dummy_function(void);
void
dummy_function (void)
{
}				/* stop some compilers complaining */
#endif