path: root/source3/rpc_server/srv_samr_nt.c

/*
 *  Unix SMB/Netbios implementation.
 *  Version 1.9.
 *  RPC Pipe client / server routines
 *  Copyright (C) Andrew Tridgell              1992-1997,
 *  Copyright (C) Luke Kenneth Casson Leighton 1996-1997,
 *  Copyright (C) Paul Ashton                       1997.
 *  Copyright (C) Marc Jacobsen			    1999.
 *  Copyright (C) Jeremy Allison                    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.
 */

/*
 * This is the implementation of the SAMR code.
 */

#include "includes.h"

extern int DEBUGLEVEL;

extern fstring global_myworkgroup;
extern pstring global_myname;
extern DOM_SID global_sam_sid;
extern DOM_SID global_sid_Builtin;

extern rid_name domain_group_rids[];
extern rid_name domain_alias_rids[];
extern rid_name builtin_alias_rids[];

struct samr_info {
    /* for use by the \PIPE\samr policy */
    DOM_SID sid;
    uint32 status; /* some sort of flag.  best to record it.  comes from opnum 0x39 */
};

/*******************************************************************
 Function to free the per handle data.
 ********************************************************************/

static void free_samr_info(void *ptr)
{
	struct samr_info *samr = (struct samr_info *)ptr;

	safe_free(samr);
}

/*******************************************************************
 Ensure password info is never given out. Paranioa... JRA.
 ********************************************************************/

static void samr_clear_passwd_fields( SAM_USER_INFO_21 *pass, int num_entries)
{
	int i;

	if (!pass)
		return;

	for (i = 0; i < num_entries; i++) {
		memset(&pass[i].lm_pwd, '\0', sizeof(pass[i].lm_pwd));
		memset(&pass[i].nt_pwd, '\0', sizeof(pass[i].nt_pwd));
	}
}

static void samr_clear_sam_passwd(SAM_ACCOUNT *sam_pass)
{
	if (!sam_pass)
		return;

	if (sam_pass->lm_pw) memset(sam_pass->lm_pw, '\0', 16);
	if (sam_pass->nt_pw) memset(sam_pass->nt_pw, '\0', 16);
}

/*******************************************************************
  This next function should be replaced with something that
  dynamically returns the correct user info..... JRA.
 ********************************************************************/

static uint32 get_sampwd_entries(SAM_USER_INFO_21 *pw_buf, int start_idx,
                                int *total_entries, int *num_entries,
                                int max_num_entries, uint16 acb_mask)
{
	SAM_ACCOUNT *pwd = NULL;
	BOOL not_finished = True;
 
	(*num_entries) = 0;
	(*total_entries) = 0;

	if (pw_buf == NULL)
		return NT_STATUS_NO_MEMORY;

	pdb_init_sam(&pwd);

	if (!pdb_setsampwent(False)) {
		DEBUG(0, ("get_sampwd_entries: Unable to open passdb.\n"));
		pdb_free_sam(pwd);
		return NT_STATUS_ACCESS_DENIED;
	}

	while (((not_finished = pdb_getsampwent(pwd)) != False) 
		&& (*num_entries) < max_num_entries) 
	{
	        int user_name_len;

	        if (start_idx > 0) {
	            /* skip the requested number of entries.
	               not very efficient, but hey...  */
		start_idx--;
		continue;
        }

	user_name_len = strlen(pdb_get_username(pwd))+1;
	init_unistr2(&pw_buf[(*num_entries)].uni_user_name, pdb_get_username(pwd), user_name_len);
	init_uni_hdr(&pw_buf[(*num_entries)].hdr_user_name, user_name_len);
	pw_buf[(*num_entries)].user_rid = pwd->user_rid;
	memset((char *)pw_buf[(*num_entries)].nt_pwd, '\0', 16);

        /* Now check if the NT compatible password is available. */
        if (pdb_get_nt_passwd(pwd))
		memcpy( pw_buf[(*num_entries)].nt_pwd , pdb_get_nt_passwd(pwd), 16);

        pw_buf[(*num_entries)].acb_info = pdb_get_acct_ctrl(pwd);

        DEBUG(5, ("entry idx: %d user %s, rid 0x%x, acb %x",
                  (*num_entries), pdb_get_username(pwd), pdb_get_user_rid(pwd), pdb_get_acct_ctrl(pwd) ));

        if (acb_mask == 0 || (pwd->acct_ctrl & acb_mask)) {
		DEBUG(5,(" acb_mask %x accepts\n", acb_mask));
		(*num_entries)++;
        }
        else
		DEBUG(5,(" acb_mask %x rejects\n", acb_mask));

		(*total_entries)++;
	}

	pdb_endsampwent();
	pdb_free_sam(pwd);

	if (not_finished)
		return STATUS_MORE_ENTRIES;
	else
		return NT_STATUS_NOPROBLEMO;
}

static uint32 jf_get_sampwd_entries(SAM_USER_INFO_21 *pw_buf, int start_idx,
                                int *total_entries, uint32 *num_entries,
                                int max_num_entries, uint16 acb_mask)
{
	SAM_ACCOUNT *pwd = NULL;
	BOOL not_finished = True;

	*num_entries = 0;
	*total_entries = 0;

	if (pw_buf == NULL)
		return NT_STATUS_NO_MEMORY;
	
	DEBUG(10,("jf_get_sampwd_entries: start index:%d, max entries:%d, mask:%d\n", 
		start_idx, max_num_entries, acb_mask));

	if (!pdb_setsampwent(False)) {
		DEBUG(0, ("jf_get_sampwd_entries: Unable to open passdb.\n"));
		return NT_STATUS_ACCESS_DENIED;
	}

	pdb_init_sam(&pwd);

	while (((not_finished = pdb_getsampwent(pwd)) != False) && (*num_entries) < max_num_entries) {
		int user_name_len;
		int full_name_len;

		if (acb_mask != 0 && !(pdb_get_acct_ctrl(pwd) & acb_mask)) {
			pdb_reset_sam(pwd);
			continue;
		}

		if (start_idx > 0) {
			/* skip the requested number of entries.
			   not very efficient, but hey...
			*/
			start_idx--;
			pdb_reset_sam(pwd);
			continue;
		}

		ZERO_STRUCTP(&pw_buf[(*num_entries)]);

		user_name_len = strlen(pdb_get_username(pwd));
		init_unistr2(&pw_buf[(*num_entries)].uni_user_name, pdb_get_username(pwd), user_name_len);
		init_uni_hdr(&pw_buf[(*num_entries)].hdr_user_name, user_name_len);

		full_name_len = strlen(pdb_get_fullname(pwd));
		init_unistr2(&pw_buf[(*num_entries)].uni_full_name, pdb_get_fullname(pwd), full_name_len);
		init_uni_hdr(&pw_buf[(*num_entries)].hdr_full_name, full_name_len);

		pw_buf[(*num_entries)].user_rid = pdb_get_user_rid(pwd);
		memset((char *)pw_buf[(*num_entries)].nt_pwd, '\0', 16);

		/* Now check if the NT compatible password is available. */
		if (pdb_get_nt_passwd(pwd))
			memcpy( pw_buf[(*num_entries)].nt_pwd , pdb_get_nt_passwd(pwd), 16);

		pw_buf[(*num_entries)].acb_info = pdb_get_acct_ctrl(pwd);

		DEBUG(5, ("entry idx: %d user %s, rid 0x%x, acb %x\n", (*num_entries),
                  pdb_get_username(pwd), pdb_get_user_rid(pwd), pdb_get_acct_ctrl(pwd) ));

		(*num_entries)++;
		
		pdb_reset_sam(pwd);
	}

	pdb_endsampwent();

	*total_entries = *num_entries;
	
	pdb_free_sam(pwd);

	if (not_finished)
		return STATUS_MORE_ENTRIES;
	else
		return NT_STATUS_NOPROBLEMO;
}

#if 0 /* This function appears to be unused! */

/*******************************************************************
 This function uses the username map file and tries to map a UNIX
 user name to an DOS name.  (Sort of the reverse of the
 map_username() function.)  Since more than one DOS name can map
 to the UNIX name, to reverse the mapping you have to specify
 which corresponding DOS name you want; that's where the name_idx
 parameter comes in.  Returns the string requested or NULL if it
 fails or can't complete the request for any reason.  This doesn't
 handle group names (starting with '@') or names starting with
 '+' or '&'.  If they are encountered, they are skipped.
********************************************************************/

static char *unmap_unixname(char *unix_user_name, int name_idx)
{
	char *mapfile = lp_username_map();
	char **lines;
	static pstring tok;
	int i;

	if (!*unix_user_name) return NULL;
	if (!*mapfile) return NULL;

	lines = file_lines_load(mapfile, NULL);
	if (!lines) {
		DEBUG(0,("unmap_unixname: can't open username map %s\n", mapfile));
		return NULL;
	}

	DEBUG(5,("unmap_unixname: scanning username map %s, index: %d\n", mapfile, name_idx));

	for (i=0; lines[i]; i++) {
		char *unixname = lines[i];
		char *dosname = strchr_m(unixname,'=');

		if (!dosname)
			continue;

		*dosname++ = 0;

		while (isspace(*unixname))
			unixname++;
		if ('!' == *unixname) {
			unixname++;
			while (*unixname && isspace(*unixname))
				unixname++;
		}
    
		if (!*unixname || strchr_m("#;",*unixname))
			continue;

		if (strncmp(unixname, unix_user_name, strlen(unix_user_name)))
			continue;

		/* We have matched the UNIX user name */

		while(next_token(&dosname, tok, LIST_SEP, sizeof(tok))) {
			if (!strchr_m("@&+", *tok)) {
				name_idx--;
				if (name_idx < 0 ) {
					break;
				}
			}
		}

		if (name_idx >= 0) {
			DEBUG(0,("unmap_unixname: index too high - not that many DOS names\n"));
			file_lines_free(lines);
			return NULL;
		} else {
			file_lines_free(lines);
			return tok;
		}
	}

	DEBUG(0,("unmap_unixname: Couldn't find the UNIX user name\n"));
	file_lines_free(lines);
	return NULL;
}

#endif /* Unused function */

#if 0 /* This function seems to be not used anywhere! */

/*******************************************************************
 This function sets up a list of users taken from the list of
 users that UNIX knows about, as well as all the user names that
 Samba maps to a valid UNIX user name.  (This should work with
 /etc/passwd or NIS.)
********************************************************************/

static BOOL get_passwd_entries(SAM_USER_INFO_21 *pw_buf,
				int start_idx,
				int *total_entries, int *num_entries,
				int max_num_entries,
				uint16 acb_mask)
{
	static struct passwd *pwd = NULL;
	static uint32 pw_rid;
	static BOOL orig_done = False;
	static int current_idx = 0;
	static int mapped_idx = 0;
	char *sep;

	DEBUG(5, ("get_passwd_entries: retrieving a list of UNIX users\n"));

	(*num_entries) = 0;
	(*total_entries) = 0;

	/* Skip all this stuff if we're in appliance mode */

	if (lp_hide_local_users()) goto done;

	if (pw_buf == NULL) return False;

	if (current_idx == 0) {
		sys_setpwent();
	}

	/* These two cases are inefficient, but should be called very rarely */
	/* they are the cases where the starting index isn't picking up      */
	/* where we left off last time.  It is efficient when it starts over */
	/* at zero though.                                                   */
	if (start_idx > current_idx) {
		/* We aren't far enough; advance to start_idx */
		while (current_idx <= start_idx) {
			char *unmap_name;

			if(!orig_done) {
				if ((pwd = sys_getpwent()) == NULL) break;
				current_idx++;
				orig_done = True;
			}

			while (((unmap_name = unmap_unixname(pwd->pw_name, mapped_idx)) != NULL) && 
			        (current_idx < start_idx)) {
				current_idx++;
				mapped_idx++;
			}

			if (unmap_name == NULL) {
				orig_done = False;
				mapped_idx = 0;
			}
		}
	} else if (start_idx < current_idx) {
		/* We are already too far; start over and advance to start_idx */
		sys_endpwent();
		sys_setpwent();
		current_idx = 0;
		mapped_idx = 0;
		orig_done = False;
		while (current_idx < start_idx) {
			char *unmap_name;

			if(!orig_done) {
				if ((pwd = sys_getpwent()) == NULL) break;
				current_idx++;
				orig_done = True;
			}

			while (((unmap_name = unmap_unixname(pwd->pw_name, mapped_idx)) != NULL) && 
			        (current_idx < start_idx)) {
				current_idx++;
				mapped_idx++;
			}

			if (unmap_name == NULL) {
				orig_done = False;
				mapped_idx = 0;
			}
		}
	}

	sep = lp_winbind_separator();

	/* now current_idx == start_idx */
	while ((*num_entries) < max_num_entries) {
		int user_name_len;
		char *unmap_name;

		/* This does the original UNIX user itself */
		if(!orig_done) {
			if ((pwd = sys_getpwent()) == NULL) break;

			/* Don't enumerate winbind users as they are not local */

			if (strchr_m(pwd->pw_name, *sep) != NULL) {
				continue;
			}

			user_name_len = strlen(pwd->pw_name);
			
			/* skip the trust account stored in the /etc/passwd file */
			if (pwd->pw_name[user_name_len-1]=='$')
				continue;
			
			pw_rid = pdb_uid_to_user_rid(pwd->pw_uid);
			ZERO_STRUCTP(&pw_buf[(*num_entries)]);
			init_unistr2(&pw_buf[(*num_entries)].uni_user_name, pwd->pw_name, user_name_len);
			init_uni_hdr(&pw_buf[(*num_entries)].hdr_user_name, user_name_len);
			pw_buf[(*num_entries)].user_rid = pw_rid;
			memset((char *)pw_buf[(*num_entries)].nt_pwd, '\0', 16);

			pw_buf[(*num_entries)].acb_info = ACB_NORMAL;

			DEBUG(5, ("get_passwd_entries: entry idx %d user %s, rid 0x%x\n", (*num_entries), pwd->pw_name, pw_rid));

			(*num_entries)++;
			(*total_entries)++;
			current_idx++;
			orig_done = True;
		}

		/* This does all the user names that map to the UNIX user */
		while (((unmap_name = unmap_unixname(pwd->pw_name, mapped_idx)) != NULL) && 
		        (*num_entries < max_num_entries)) {
			user_name_len = strlen(unmap_name);
			ZERO_STRUCTP(&pw_buf[(*num_entries)]);
			init_unistr2(&pw_buf[(*num_entries)].uni_user_name, unmap_name, user_name_len);
			init_uni_hdr(&pw_buf[(*num_entries)].hdr_user_name, user_name_len);
			pw_buf[(*num_entries)].user_rid = pw_rid;
			memset((char *)pw_buf[(*num_entries)].nt_pwd, '\0', 16);

			pw_buf[(*num_entries)].acb_info = ACB_NORMAL;

			DEBUG(5, ("get_passwd_entries: entry idx %d user %s, rid 0x%x\n", (*num_entries), pwd->pw_name, pw_rid));

			(*num_entries)++;
			(*total_entries)++;
			current_idx++;
			mapped_idx++;
		}

		if (unmap_name == NULL) {
			/* done with 'aliases', go on to next UNIX user */
			orig_done = False;
			mapped_idx = 0;
		}
	}

	if (pwd == NULL) {
		/* totally done, reset everything */
		sys_endpwent();
		current_idx = 0;
		mapped_idx = 0;
	}

done:
	return (*num_entries) > 0;
}

#endif /* Unused function */

/*******************************************************************
 _samr_close_hnd
 ********************************************************************/

uint32 _samr_close_hnd(pipes_struct *p, SAMR_Q_CLOSE_HND *q_u, SAMR_R_CLOSE_HND *r_u)
{
	r_u->status = NT_STATUS_NOPROBLEMO;

	/* close the policy handle */
	if (!close_policy_hnd(p, &q_u->pol))
		return NT_STATUS_OBJECT_NAME_INVALID;

	DEBUG(5,("samr_reply_close_hnd: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
 samr_reply_open_domain
 ********************************************************************/

uint32 _samr_open_domain(pipes_struct *p, SAMR_Q_OPEN_DOMAIN *q_u, SAMR_R_OPEN_DOMAIN *r_u)
{
	struct samr_info *info;

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* find the connection policy handle. */
	if (!find_policy_by_hnd(p, &q_u->pol, NULL))
		return NT_STATUS_INVALID_HANDLE;

	/* associate the domain SID with the (unique) handle. */
	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(info);
	info->sid = q_u->dom_sid.sid;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, &r_u->domain_pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	DEBUG(5,("samr_open_domain: %d\n", __LINE__));

	return r_u->status;
}

static uint32 get_lsa_policy_samr_rid(struct samr_info *info)
{
	if (!info) {
    	DEBUG(3,("Error getting policy\n"));
	    return 0xffffffff;
	}

	return info->sid.sub_auths[info->sid.num_auths-1];
}

/*******************************************************************
 _samr_get_usrdom_pwinfo
 ********************************************************************/

uint32 _samr_get_usrdom_pwinfo(pipes_struct *p, SAMR_Q_GET_USRDOM_PWINFO *q_u, SAMR_R_GET_USRDOM_PWINFO *r_u)
{
	struct samr_info *info = NULL;

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, &q_u->user_pol, (void **)&info)) {
		return NT_STATUS_INVALID_HANDLE;
	}

	/* find the user's rid */
	if (get_lsa_policy_samr_rid(info) == 0xffffffff) {
		return NT_STATUS_OBJECT_TYPE_MISMATCH;
	}

	init_samr_r_get_usrdom_pwinfo(r_u, NT_STATUS_NOPROBLEMO);

	DEBUG(5,("_samr_get_usrdom_pwinfo: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
 samr_make_usr_obj_sd
 ********************************************************************/

static uint32 samr_make_usr_obj_sd(TALLOC_CTX *ctx, SEC_DESC_BUF **buf, DOM_SID *usr_sid)
{
	extern DOM_SID global_sid_World;
	DOM_SID adm_sid;
	DOM_SID act_sid;

	SEC_ACE ace[4];
	SEC_ACCESS mask;

	SEC_ACL *psa = NULL;
	SEC_DESC *psd = NULL;
	size_t sd_size;

	sid_copy(&adm_sid, &global_sid_Builtin);
	sid_append_rid(&adm_sid, BUILTIN_ALIAS_RID_ADMINS);

	sid_copy(&act_sid, &global_sid_Builtin);
	sid_append_rid(&act_sid, BUILTIN_ALIAS_RID_ACCOUNT_OPS);

	init_sec_access(&mask, 0x2035b);
	init_sec_ace(&ace[0], &global_sid_World, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	init_sec_access(&mask, 0xf07ff);
	init_sec_ace(&ace[1], &adm_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);
	init_sec_ace(&ace[2], &act_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	init_sec_access(&mask,0x20044);
	init_sec_ace(&ace[3], usr_sid, SEC_ACE_TYPE_ACCESS_ALLOWED, mask, 0);

	if((psa = make_sec_acl(ctx, NT4_ACL_REVISION, 4, ace)) == NULL)
		return NT_STATUS_NO_MEMORY;

	if((psd = make_sec_desc(ctx, SEC_DESC_REVISION, NULL, NULL, NULL, psa, &sd_size)) == NULL)
		return NT_STATUS_NO_MEMORY;

	if((*buf = make_sec_desc_buf(ctx, sd_size, psd)) == NULL)
		return NT_STATUS_NO_MEMORY;

	return NT_STATUS_NOPROBLEMO;
}

static BOOL get_lsa_policy_samr_sid(pipes_struct *p, POLICY_HND *pol, DOM_SID *sid)
{
	struct samr_info *info = NULL;

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, pol, (void **)&info))
		return False;

	if (!info)
		return False;

	*sid = info->sid;
	return True;
}

/*******************************************************************
 _samr_query_sec_obj
 ********************************************************************/

uint32 _samr_query_sec_obj(pipes_struct *p, SAMR_Q_QUERY_SEC_OBJ *q_u, SAMR_R_QUERY_SEC_OBJ *r_u)
{
	DOM_SID pol_sid;

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* Get the SID. */

	if (!get_lsa_policy_samr_sid(p, &q_u->user_pol, &pol_sid))
		return NT_STATUS_INVALID_HANDLE;

	r_u->status = samr_make_usr_obj_sd(p->mem_ctx, &r_u->buf, &pol_sid);

	if (r_u->status == NT_STATUS_NOPROBLEMO)
		r_u->ptr = 1;

	return r_u->status;
}

/*******************************************************************
makes a SAM_ENTRY / UNISTR2* structure from a user list.
********************************************************************/

static void make_user_sam_entry_list(TALLOC_CTX *ctx, SAM_ENTRY **sam_pp, UNISTR2 **uni_name_pp,
                uint32 num_sam_entries, SAM_USER_INFO_21 *pass)
{
	uint32 i;
	SAM_ENTRY *sam;
	UNISTR2 *uni_name;

	*sam_pp = NULL;
	*uni_name_pp = NULL;

	if (num_sam_entries == 0)
		return;

	sam = (SAM_ENTRY *)talloc_zero(ctx, sizeof(SAM_ENTRY)*num_sam_entries);

	uni_name = (UNISTR2 *)talloc_zero(ctx, sizeof(UNISTR2)*num_sam_entries);

	if (sam == NULL || uni_name == NULL) {
		DEBUG(0, ("NULL pointers in SAMR_R_QUERY_DISPINFO\n"));
		return;
	}

	ZERO_STRUCTP(sam);
	ZERO_STRUCTP(uni_name);

	for (i = 0; i < num_sam_entries; i++) {
		int len = pass[i].uni_user_name.uni_str_len;

		init_sam_entry(&sam[i], len, pass[i].user_rid);
		copy_unistr2(&uni_name[i], &pass[i].uni_user_name);
	}

	*sam_pp = sam;
	*uni_name_pp = uni_name;
}

/*******************************************************************
 samr_reply_enum_dom_users
 ********************************************************************/

uint32 _samr_enum_dom_users(pipes_struct *p, SAMR_Q_ENUM_DOM_USERS *q_u, SAMR_R_ENUM_DOM_USERS *r_u)
{
	SAM_USER_INFO_21 pass[MAX_SAM_ENTRIES];
	int num_entries = 0;
	int total_entries = 0;
	
	r_u->status = NT_STATUS_NOPROBLEMO;

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, &q_u->pol, NULL))
		return NT_STATUS_INVALID_HANDLE;

	DEBUG(5,("_samr_enum_dom_users: %d\n", __LINE__));

	become_root();
	r_u->status = get_sampwd_entries(pass, q_u->start_idx, &total_entries, &num_entries,
								MAX_SAM_ENTRIES, q_u->acb_mask);
	unbecome_root();

	if (r_u->status != NT_STATUS_NOPROBLEMO && r_u->status != STATUS_MORE_ENTRIES)
		return r_u->status;

	samr_clear_passwd_fields(pass, num_entries);

	/* 
	 * Note from JRA. total_entries is not being used here. Currently if there is a
	 * large user base then it looks like NT will enumerate until get_sampwd_entries
	 * returns False due to num_entries being zero. This will cause an access denied
	 * return. I don't think this is right and needs further investigation. Note that
	 * this is also the same in the TNG code (I don't think that has been tested with
	 * a very large user list as MAX_SAM_ENTRIES is set to 600).
	 * 
	 * I also think that one of the 'num_entries' return parameters is probably
	 * the "max entries" parameter - but in the TNG code they're all currently set to the same
	 * value (again I think this is wrong).
	 */

	make_user_sam_entry_list(p->mem_ctx, &r_u->sam, &r_u->uni_acct_name, num_entries, pass);

	init_samr_r_enum_dom_users(r_u, q_u->start_idx + num_entries, num_entries);

	DEBUG(5,("_samr_enum_dom_users: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
makes a SAM_ENTRY / UNISTR2* structure from a group list.
********************************************************************/

static void make_group_sam_entry_list(TALLOC_CTX *ctx, SAM_ENTRY **sam_pp, UNISTR2 **uni_name_pp,
                uint32 num_sam_entries, DOMAIN_GRP *grp)
{
	uint32 i;
	SAM_ENTRY *sam;
	UNISTR2 *uni_name;

	*sam_pp = NULL;
	*uni_name_pp = NULL;

	if (num_sam_entries == 0)
		return;

	sam = (SAM_ENTRY *)talloc_zero(ctx, sizeof(SAM_ENTRY)*num_sam_entries);

	uni_name = (UNISTR2 *)talloc_zero(ctx, sizeof(UNISTR2)*num_sam_entries);

	if (sam == NULL || uni_name == NULL) {
		DEBUG(0, ("NULL pointers in SAMR_R_QUERY_DISPINFO\n"));
		return;
	}

	for (i = 0; i < num_sam_entries; i++) {
		/*
		 * JRA. I think this should include the null. TNG does not.
		 */
		int len = strlen(grp[i].name)+1;

		init_sam_entry(&sam[i], len, grp[i].rid);
		init_unistr2(&uni_name[i], grp[i].name, len);
	}

	*sam_pp = sam;
	*uni_name_pp = uni_name;
}

/*******************************************************************
 Get the group entries - similar to get_sampwd_entries().
 ********************************************************************/

static BOOL get_group_alias_entries(TALLOC_CTX *ctx, DOMAIN_GRP **d_grp, DOM_SID *sid, uint32 start_idx,
				    uint32 *p_num_entries, uint32 max_entries)
{
	fstring sid_str;
	uint32 num_entries = 0;
	int i;
	GROUP_MAP smap;
	GROUP_MAP *map;

	sid_to_string(sid_str, sid);
	DEBUG(5, ("get_group_alias_entries: enumerating aliases on SID: %s\n", sid_str));

	*p_num_entries = 0;

	/* well-known aliases */
	if (sid_equal(sid, &global_sid_Builtin) && !lp_hide_local_users()) {
		
		enum_group_mapping(SID_NAME_WKN_GRP, &map, (int *)&num_entries, ENUM_ALL_MAPPED);
	
		*d_grp=(DOMAIN_GRP *)talloc_zero(ctx, num_entries*sizeof(DOMAIN_GRP));
		if (*d_grp==NULL)
			return NT_STATUS_NO_MEMORY;
		
		for(i=0; i<num_entries && i<max_entries; i++) {
			fstrcpy((*d_grp)[i].name, map[i+start_idx].nt_name);
			sid_split_rid(&map[i].sid, &(*d_grp)[i].rid);

		}
		
		safe_free(map);
		
	} else if (sid_equal(sid, &global_sam_sid) && !lp_hide_local_users()) {
		char *sep;
		struct sys_grent *glist;
		struct sys_grent *grp;
	
		sep = lp_winbind_separator();

		/* local aliases */
		/* we return the UNIX groups here.  This seems to be the right */
		/* thing to do, since NT member servers return their local     */
                /* groups in the same situation.                               */

		/* use getgrent_list() to retrieve the list of groups to avoid
		 * problems with getgrent possible infinite loop by internal
		 * libc grent structures overwrites by called functions */
		grp = glist = getgrent_list();
		if (grp == NULL)
			return NT_STATUS_NO_MEMORY;
		
		for (; (num_entries < max_entries) && (grp != NULL); grp = grp->next) {
			uint32 trid;
			
			if(!get_group_from_gid(grp->gr_gid, &smap)) {
				continue;
			}

			if (smap.sid_name_use!=SID_NAME_ALIAS) {
				continue;
			}

			sid_split_rid(&smap.sid, &trid);

			/* Don't return winbind groups as they are not local! */
			if (strchr_m(smap.nt_name, *sep) != NULL) {
				DEBUG(10,("get_group_alias_entries: not returing %s, not local.\n", smap.nt_name ));
				continue;
			}

			/* Don't return user private groups... */
			if (Get_Pwnam(smap.nt_name, False) != 0) {
				DEBUG(10,("get_group_alias_entries: not returing %s, clashes with user.\n", smap.nt_name ));
				continue;			
			}

			for( i = 0; i < num_entries; i++)
				if ( (*d_grp)[i].rid == trid )
					break;

			if ( i < num_entries )
				continue; /* rid was there, dup! */

			/* JRA - added this for large group db enumeration... */

			if (start_idx > 0) {
				/* skip the requested number of entries.
					not very efficient, but hey...
				*/
				start_idx--;
				continue;
			}

			*d_grp=talloc_realloc(ctx,*d_grp, (num_entries+1)*sizeof(DOMAIN_GRP));
			if (*d_grp==NULL) {
				grent_free(glist);
				return NT_STATUS_NO_MEMORY;
			}

			fstrcpy((*d_grp)[num_entries].name, smap.nt_name);
			(*d_grp)[num_entries].rid = trid;
			num_entries++;
			DEBUG(10,("get_group_alias_entries: added entry %d, rid:%d\n", num_entries, trid));
		}

		grent_free(glist);
	}

	*p_num_entries = num_entries;

	DEBUG(10,("get_group_alias_entries: returning %d entries\n", *p_num_entries));

	return NT_STATUS_NOPROBLEMO;
}

/*******************************************************************
 Get the group entries - similar to get_sampwd_entries().
 ********************************************************************/

static uint32 get_group_domain_entries(TALLOC_CTX *ctx, DOMAIN_GRP **d_grp, DOM_SID *sid, uint32 start_idx,
				     uint32 *p_num_entries, uint32 max_entries)
{
	GROUP_MAP *map=NULL;
	int i;
	uint32 group_entries = 0;
	uint32 num_entries = 0;

	*p_num_entries = 0;

	enum_group_mapping(SID_NAME_DOM_GRP, &map, (int *)&group_entries, ENUM_ONLY_MAPPED);

	num_entries=group_entries-start_idx;

	/* limit the number of entries */
	if (num_entries>max_entries) {
		DEBUG(5,("Limiting to %d entries\n", max_entries));
		num_entries=max_entries;
	}

	*d_grp=(DOMAIN_GRP *)talloc_zero(ctx, num_entries*sizeof(DOMAIN_GRP));
	if (num_entries!=0 && *d_grp==NULL){
		safe_free(map);
		return NT_STATUS_NO_MEMORY;
	}
	
	for (i=0; i<num_entries; i++) {
		fstrcpy((*d_grp)[i].name, map[i+start_idx].nt_name);
		fstrcpy((*d_grp)[i].comment, map[i+start_idx].comment);
		sid_split_rid(&map[i+start_idx].sid, &(*d_grp)[i].rid);
		(*d_grp)[i].attr=SID_NAME_DOM_GRP;
	}

	safe_free(map);

	*p_num_entries = num_entries;

	return NT_STATUS_NOPROBLEMO;
}

/*******************************************************************
 samr_reply_enum_dom_groups
 Only reply with one group - domain admins. This must be fixed for
 a real PDC. JRA.
 ********************************************************************/

uint32 _samr_enum_dom_groups(pipes_struct *p, SAMR_Q_ENUM_DOM_GROUPS *q_u, SAMR_R_ENUM_DOM_GROUPS *r_u)
{
	DOMAIN_GRP *grp=NULL;
	uint32 num_entries;
	DOM_SID sid;

	r_u->status = NT_STATUS_NOPROBLEMO;

	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	DEBUG(5,("samr_reply_enum_dom_groups: %d\n", __LINE__));

	/* the domain group array is being allocated in the function below */
	get_group_domain_entries(p->mem_ctx, &grp, &sid, q_u->start_idx, &num_entries, MAX_SAM_ENTRIES);

	make_group_sam_entry_list(p->mem_ctx, &r_u->sam, &r_u->uni_grp_name, num_entries, grp);

	init_samr_r_enum_dom_groups(r_u, q_u->start_idx, num_entries);

	DEBUG(5,("samr_enum_dom_groups: %d\n", __LINE__));

	return r_u->status;
}


/*******************************************************************
 samr_reply_enum_dom_aliases
 ********************************************************************/

uint32 _samr_enum_dom_aliases(pipes_struct *p, SAMR_Q_ENUM_DOM_ALIASES *q_u, SAMR_R_ENUM_DOM_ALIASES *r_u)
{
	DOMAIN_GRP *grp=NULL;
	uint32 num_entries = 0;
	fstring sid_str;
	DOM_SID sid;
	
	r_u->status = NT_STATUS_NOPROBLEMO;

	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	sid_to_string(sid_str, &sid);
	DEBUG(5,("samr_reply_enum_dom_aliases: sid %s\n", sid_str));

	if (get_group_alias_entries(p->mem_ctx, &grp, &sid, q_u->start_idx, &num_entries, MAX_SAM_ENTRIES)!=NT_STATUS_NOPROBLEMO)
		return NT_STATUS_ACCESS_DENIED;

	make_group_sam_entry_list(p->mem_ctx, &r_u->sam, &r_u->uni_grp_name, num_entries, grp);

	/*safe_free(grp);*/

	init_samr_r_enum_dom_aliases(r_u, q_u->start_idx, num_entries);

	DEBUG(5,("samr_enum_dom_aliases: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
 samr_reply_query_dispinfo
 ********************************************************************/

uint32 _samr_query_dispinfo(pipes_struct *p, SAMR_Q_QUERY_DISPINFO *q_u, SAMR_R_QUERY_DISPINFO *r_u)
{
	SAM_USER_INFO_21 pass[MAX_SAM_ENTRIES];
	DOMAIN_GRP *grps=NULL;
	uint16 acb_mask = ACB_NORMAL;
	uint32 num_entries = 0;
	int orig_num_entries = 0;
	int total_entries = 0;
	uint32 data_size = 0;
	DOM_SID sid;
	uint32 disp_ret;
	SAM_DISPINFO_CTR *ctr;

	DEBUG(5, ("samr_reply_query_dispinfo: %d\n", __LINE__));

	r_u->status = NT_STATUS_NOPROBLEMO;

	if (!get_lsa_policy_samr_sid(p, &q_u->domain_pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	/* decide how many entries to get depending on the max_entries
	   and max_size passed by client */

	DEBUG(5, ("samr_reply_query_dispinfo: max_entries before %d\n", q_u->max_entries));

	if(q_u->max_entries > MAX_SAM_ENTRIES)
		q_u->max_entries = MAX_SAM_ENTRIES;

	DEBUG(5, ("samr_reply_query_dispinfo: max_entries after %d\n", q_u->max_entries));

	/* Get what we need from the password database */
	switch (q_u->switch_level) {
	case 0x2:
		acb_mask = ACB_WSTRUST;
		/* Fall through */
	case 0x1:
	case 0x4:
		become_root();
#if 0
		r_u->status = get_passwd_entries(pass, q_u->start_idx, &total_entries, &num_entries,
						MAX_SAM_ENTRIES, acb_mask);
#endif
#if 0
	/*
	 * Which should we use here ? JRA.
	 */
		r_u->status = get_sampwd_entries(pass, q_u->start_idx, &total_entries, &num_entries,
						MAX_SAM_ENTRIES, acb_mask);
#endif
#if 1
		r_u->status = jf_get_sampwd_entries(pass, q_u->start_idx, &total_entries, &num_entries,
						MAX_SAM_ENTRIES, acb_mask);
#endif
		unbecome_root();
		if (r_u->status!=STATUS_MORE_ENTRIES && r_u->status!=NT_STATUS_NOPROBLEMO) {
			DEBUG(5, ("get_sampwd_entries: failed\n"));
			return r_u->status;
		}
		break;
	case 0x3:
	case 0x5:
		r_u->status = get_group_domain_entries(p->mem_ctx, &grps, &sid, q_u->start_idx, &num_entries, MAX_SAM_ENTRIES);
		if (r_u->status != NT_STATUS_NOPROBLEMO)
			return NT_STATUS_ACCESS_DENIED;
		break;
	default:
		DEBUG(0,("_samr_query_dispinfo: Unknown info level (%u)\n", (unsigned int)q_u->switch_level ));
		return NT_STATUS_INVALID_INFO_CLASS;
	}

	orig_num_entries = num_entries;

	if (num_entries > q_u->max_entries)
		num_entries = q_u->max_entries;

	if (num_entries > MAX_SAM_ENTRIES) {
		num_entries = MAX_SAM_ENTRIES;
		DEBUG(5, ("limiting number of entries to %d\n", num_entries));
	}

	/* Ensure password info is never given out here. PARANOIA... JRA */
	samr_clear_passwd_fields(pass, num_entries);

	data_size = q_u->max_size;

	if (!(ctr = (SAM_DISPINFO_CTR *)talloc_zero(p->mem_ctx,sizeof(SAM_DISPINFO_CTR))))
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(ctr);

	/* Now create reply structure */
	switch (q_u->switch_level) {
	case 0x1:
		if (num_entries) {
			if (!(ctr->sam.info1 = (SAM_DISPINFO_1 *)talloc_zero(p->mem_ctx,num_entries*sizeof(SAM_DISPINFO_1))))
				return NT_STATUS_NO_MEMORY;
		}
		disp_ret = init_sam_dispinfo_1(p->mem_ctx, ctr->sam.info1, &num_entries, &data_size, q_u->start_idx, pass);
		if (disp_ret != NT_STATUS_NOPROBLEMO)
			return disp_ret;
		break;
	case 0x2:
		if (num_entries) {
			if (!(ctr->sam.info2 = (SAM_DISPINFO_2 *)talloc_zero(p->mem_ctx,num_entries*sizeof(SAM_DISPINFO_2))))
				return NT_STATUS_NO_MEMORY;
		}
		disp_ret = init_sam_dispinfo_2(p->mem_ctx, ctr->sam.info2, &num_entries, &data_size, q_u->start_idx, pass);
		if (disp_ret != NT_STATUS_NOPROBLEMO)
			return disp_ret;
		break;
	case 0x3:
		if (num_entries) {
			if (!(ctr->sam.info3 = (SAM_DISPINFO_3 *)talloc_zero(p->mem_ctx,num_entries*sizeof(SAM_DISPINFO_3))))
				return NT_STATUS_NO_MEMORY;
		}
		disp_ret = init_sam_dispinfo_3(p->mem_ctx, ctr->sam.info3, &num_entries, &data_size, q_u->start_idx, grps);
		if (disp_ret != NT_STATUS_NOPROBLEMO)
			return disp_ret;
		break;
	case 0x4:
		if (num_entries) {
			if (!(ctr->sam.info4 = (SAM_DISPINFO_4 *)talloc_zero(p->mem_ctx,num_entries*sizeof(SAM_DISPINFO_4))))
				return NT_STATUS_NO_MEMORY;
		}
		disp_ret = init_sam_dispinfo_4(p->mem_ctx, ctr->sam.info4, &num_entries, &data_size, q_u->start_idx, pass);
		if (disp_ret != NT_STATUS_NOPROBLEMO)
			return disp_ret;
		break;
	case 0x5:
		if (num_entries) {
			if (!(ctr->sam.info5 = (SAM_DISPINFO_5 *)talloc_zero(p->mem_ctx,num_entries*sizeof(SAM_DISPINFO_5))))
				return NT_STATUS_NO_MEMORY;
		}
		disp_ret = init_sam_dispinfo_5(p->mem_ctx, ctr->sam.info5, &num_entries, &data_size, q_u->start_idx, grps);
		if (disp_ret != NT_STATUS_NOPROBLEMO)
			return disp_ret;
		break;
	default:
		ctr->sam.info = NULL;
		return NT_STATUS_INVALID_INFO_CLASS;
	}

	DEBUG(5, ("_samr_query_dispinfo: %d\n", __LINE__));

	if (num_entries < orig_num_entries)
		return STATUS_MORE_ENTRIES;

	init_samr_r_query_dispinfo(r_u, num_entries, data_size, q_u->switch_level, ctr, r_u->status);

	return r_u->status;
}

/*******************************************************************
 samr_reply_query_aliasinfo
 ********************************************************************/

uint32 _samr_query_aliasinfo(pipes_struct *p, SAMR_Q_QUERY_ALIASINFO *q_u, SAMR_R_QUERY_ALIASINFO *r_u)
{
	fstring alias_desc = "Local Unix group";
	fstring alias="";
	enum SID_NAME_USE type;
	uint32 alias_rid;
	struct samr_info *info = NULL;

	r_u->status = NT_STATUS_NOPROBLEMO;

	DEBUG(5,("_samr_query_aliasinfo: %d\n", __LINE__));

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, &q_u->pol, (void **)&info))
		return NT_STATUS_INVALID_HANDLE;

	alias_rid = get_lsa_policy_samr_rid(info);
	if(alias_rid == 0xffffffff)
		return NT_STATUS_NO_SUCH_ALIAS;

	if(!local_lookup_rid(alias_rid, alias, &type))
		return NT_STATUS_NO_SUCH_ALIAS;

	switch (q_u->switch_level) {
	case 3:
		r_u->ptr = 1;
		r_u->ctr.switch_value1 = 3;
		init_samr_alias_info3(&r_u->ctr.alias.info3, alias_desc);
		break;
	default:
		return NT_STATUS_INVALID_INFO_CLASS;
	}

	DEBUG(5,("_samr_query_aliasinfo: %d\n", __LINE__));

	return r_u->status;
}

#if 0
/*******************************************************************
 samr_reply_lookup_ids
 ********************************************************************/

 uint32 _samr_lookup_ids(pipes_struct *p, SAMR_Q_LOOKUP_IDS *q_u, SAMR_R_LOOKUP_IDS *r_u)
{
    uint32 rid[MAX_SAM_ENTRIES];
    int num_rids = q_u->num_sids1;

    r_u->status = NT_STATUS_NOPROBLEMO;

    DEBUG(5,("_samr_lookup_ids: %d\n", __LINE__));

    if (num_rids > MAX_SAM_ENTRIES) {
        num_rids = MAX_SAM_ENTRIES;
        DEBUG(5,("_samr_lookup_ids: truncating entries to %d\n", num_rids));
    }

#if 0
    int i;
    SMB_ASSERT_ARRAY(q_u->uni_user_name, num_rids);

    for (i = 0; i < num_rids && status == 0; i++)
    {
        struct sam_passwd *sam_pass;
        fstring user_name;


        fstrcpy(user_name, unistrn2(q_u->uni_user_name[i].buffer,
                                    q_u->uni_user_name[i].uni_str_len));

        /* find the user account */
        become_root();
        sam_pass = get_smb21pwd_entry(user_name, 0);
        unbecome_root();

        if (sam_pass == NULL)
        {
            status = 0xC0000000 | NT_STATUS_NO_SUCH_USER;
            rid[i] = 0;
        }
        else
        {
            rid[i] = sam_pass->user_rid;
        }
    }
#endif

    num_rids = 1;
    rid[0] = BUILTIN_ALIAS_RID_USERS;

    init_samr_r_lookup_ids(&r_u, num_rids, rid, NT_STATUS_NOPROBLEMO);

    DEBUG(5,("_samr_lookup_ids: %d\n", __LINE__));

    return r_u->status;
}
#endif

/*******************************************************************
 _samr_lookup_names
 ********************************************************************/

uint32 _samr_lookup_names(pipes_struct *p, SAMR_Q_LOOKUP_NAMES *q_u, SAMR_R_LOOKUP_NAMES *r_u)
{
    uint32 rid[MAX_SAM_ENTRIES];
    enum SID_NAME_USE type[MAX_SAM_ENTRIES];
    int i;
    int num_rids = q_u->num_names2;
    DOM_SID pol_sid;

    r_u->status = NT_STATUS_NOPROBLEMO;

    DEBUG(5,("_samr_lookup_names: %d\n", __LINE__));

    ZERO_ARRAY(rid);
    ZERO_ARRAY(type);

    if (!get_lsa_policy_samr_sid(p, &q_u->pol, &pol_sid)) {
        init_samr_r_lookup_names(p->mem_ctx, r_u, 0, NULL, NULL, NT_STATUS_OBJECT_TYPE_MISMATCH);
        return r_u->status;
    }

    if (num_rids > MAX_SAM_ENTRIES) {
        num_rids = MAX_SAM_ENTRIES;
        DEBUG(5,("_samr_lookup_names: truncating entries to %d\n", num_rids));
    }

    for (i = 0; i < num_rids; i++) {
        fstring name;

        r_u->status = NT_STATUS_NONE_MAPPED;

        rid [i] = 0xffffffff;
        type[i] = SID_NAME_UNKNOWN;

	rpcstr_pull(name, q_u->uni_name[i].buffer, sizeof(name), q_u->uni_name[i].uni_str_len*2, 0);

        if(sid_equal(&pol_sid, &global_sam_sid)) {
            DOM_SID sid;
            if(local_lookup_name(global_myname, name, &sid, &type[i])) {
                sid_split_rid( &sid, &rid[i]);
                r_u->status = NT_STATUS_NOPROBLEMO;
            }
        }
    }

    init_samr_r_lookup_names(p->mem_ctx, r_u, num_rids, rid, (uint32 *)type, r_u->status);

    DEBUG(5,("_samr_lookup_names: %d\n", __LINE__));

    return r_u->status;
}

/*******************************************************************
 _samr_chgpasswd_user
 ********************************************************************/

uint32 _samr_chgpasswd_user(pipes_struct *p, SAMR_Q_CHGPASSWD_USER *q_u, SAMR_R_CHGPASSWD_USER *r_u)
{
    fstring user_name;
    fstring wks;

    DEBUG(5,("_samr_chgpasswd_user: %d\n", __LINE__));

    r_u->status = NT_STATUS_NOPROBLEMO;

    rpcstr_pull(user_name, q_u->uni_user_name.buffer, sizeof(user_name), q_u->uni_user_name.uni_str_len*2, 0);
    rpcstr_pull(wks, q_u->uni_dest_host.buffer, sizeof(wks), q_u->uni_dest_host.uni_str_len,0);

    DEBUG(5,("samr_chgpasswd_user: user: %s wks: %s\n", user_name, wks));

	/*
	 * Pass the user through the NT -> unix user mapping
	 * function.
	 */
 
	(void)map_username(user_name);
 
	/*
	 * Do any UNIX username case mangling.
	 */
	(void)Get_Pwnam( user_name, True);

    if (!pass_oem_change(user_name, q_u->lm_newpass.pass, q_u->lm_oldhash.hash,
                         q_u->nt_newpass.pass, q_u->nt_oldhash.hash))
        r_u->status = NT_STATUS_WRONG_PASSWORD;

    init_samr_r_chgpasswd_user(r_u, r_u->status);

    DEBUG(5,("_samr_chgpasswd_user: %d\n", __LINE__));

    return r_u->status;
}

/*******************************************************************
makes a SAMR_R_LOOKUP_RIDS structure.
********************************************************************/

static BOOL make_samr_lookup_rids(TALLOC_CTX *ctx, uint32 num_names, fstring names[],
	    UNIHDR **pp_hdr_name, UNISTR2 **pp_uni_name)
{
	uint32 i;
	UNIHDR *hdr_name=NULL;
	UNISTR2 *uni_name=NULL;

	*pp_uni_name = NULL;
	*pp_hdr_name = NULL;

	if (num_names != 0) {
		hdr_name = (UNIHDR *)talloc_zero(ctx, sizeof(UNIHDR)*num_names);
		if (hdr_name == NULL)
			return False;

		uni_name = (UNISTR2 *)talloc_zero(ctx,sizeof(UNISTR2)*num_names);
		if (uni_name == NULL)
			return False;
	}

	for (i = 0; i < num_names; i++) {
		int len = names[i] != NULL ? strlen(names[i]) : 0;
		DEBUG(10, ("names[%d]:%s\n", i, names[i]));
		init_uni_hdr(&hdr_name[i], len);
		init_unistr2(&uni_name[i], names[i], len);
	}

	*pp_uni_name = uni_name;
	*pp_hdr_name = hdr_name;

	return True;
}

/*******************************************************************
 _samr_lookup_rids
 ********************************************************************/

uint32 _samr_lookup_rids(pipes_struct *p, SAMR_Q_LOOKUP_RIDS *q_u, SAMR_R_LOOKUP_RIDS *r_u)
{
	fstring group_names[MAX_SAM_ENTRIES];
	uint32 *group_attrs = NULL;
	UNIHDR *hdr_name = NULL;
	UNISTR2 *uni_name = NULL;
	DOM_SID pol_sid;
	int num_rids = q_u->num_rids1;
	int i;

	r_u->status = NT_STATUS_NOPROBLEMO;

	DEBUG(5,("_samr_lookup_rids: %d\n", __LINE__));

	/* find the policy handle.  open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &pol_sid))
		return NT_STATUS_INVALID_HANDLE;

	if (num_rids > MAX_SAM_ENTRIES) {
		num_rids = MAX_SAM_ENTRIES;
		DEBUG(5,("_samr_lookup_rids: truncating entries to %d\n", num_rids));
	}

	if (num_rids) {
		if ((group_attrs = (uint32 *)talloc_zero(p->mem_ctx, num_rids * sizeof(uint32))) == NULL)
			return NT_STATUS_NO_MEMORY;
 	}
 
	r_u->status = NT_STATUS_NONE_MAPPED;

	for (i = 0; i < num_rids; i++) {
		fstring tmpname;
		fstring domname;
		DOM_SID sid;
   		enum SID_NAME_USE type;

		group_attrs[i] = SID_NAME_UNKNOWN;
		*group_names[i] = '\0';

		if (sid_equal(&pol_sid, &global_sam_sid)) {
			sid_copy(&sid, &pol_sid);
			sid_append_rid(&sid, q_u->rid[i]);

			if (lookup_sid(&sid, domname, tmpname, &type)) {
				r_u->status = NT_STATUS_NOPROBLEMO;
				group_attrs[i] = (uint32)type;
				fstrcpy(group_names[i],tmpname);
				DEBUG(5,("_samr_lookup_rids: %s:%d\n", group_names[i], group_attrs[i]));
			}
		}
	}

	if(!make_samr_lookup_rids(p->mem_ctx, num_rids, group_names, &hdr_name, &uni_name))
		return NT_STATUS_NO_MEMORY;

	init_samr_r_lookup_rids(r_u, num_rids, hdr_name, uni_name, group_attrs);

	DEBUG(5,("_samr_lookup_rids: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
 _api_samr_open_user. Safe - gives out no passwd info.
 ********************************************************************/

uint32 _api_samr_open_user(pipes_struct *p, SAMR_Q_OPEN_USER *q_u, SAMR_R_OPEN_USER *r_u)
{
	SAM_ACCOUNT *sampass=NULL;
	DOM_SID sid;
	POLICY_HND domain_pol = q_u->domain_pol;
	uint32 user_rid = q_u->user_rid;
	POLICY_HND *user_pol = &r_u->user_pol;
	struct samr_info *info = NULL;
	BOOL ret;

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* find the domain policy handle. */
	if (!find_policy_by_hnd(p, &domain_pol, NULL))
		return NT_STATUS_INVALID_HANDLE;

	pdb_init_sam(&sampass);

	become_root();
	ret=pdb_getsampwrid(sampass, user_rid);
	unbecome_root();

	/* check that the RID exists in our domain. */
	if (ret == False) {
		pdb_free_sam(sampass);
        	return NT_STATUS_NO_SUCH_USER;
	}

	samr_clear_sam_passwd(sampass);
	pdb_free_sam(sampass);

	/* Get the domain SID stored in the domain policy */
	if(!get_lsa_policy_samr_sid(p, &domain_pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	/* append the user's RID to it */
	if(!sid_append_rid(&sid, user_rid))
		return NT_STATUS_NO_SUCH_USER;

	/* associate the user's SID with the new handle. */
	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(info);
	info->sid = sid;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, user_pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	return r_u->status;
}

/*************************************************************************
 get_user_info_10. Safe. Only gives out acb bits.
 *************************************************************************/

static BOOL get_user_info_10(SAM_USER_INFO_10 *id10, uint32 user_rid)
{
	SAM_ACCOUNT *smbpass=NULL;
	BOOL ret;

	if (!pdb_rid_is_user(user_rid)) {
		DEBUG(4,("RID 0x%x is not a user RID\n", user_rid));
		return False;
	}

	pdb_init_sam(&smbpass);

	become_root();
	ret = pdb_getsampwrid(smbpass, user_rid);
	unbecome_root();

	if (ret==False) {
		DEBUG(4,("User 0x%x not found\n", user_rid));
		pdb_free_sam(smbpass);
		return False;
	}

	DEBUG(3,("User:[%s]\n", pdb_get_username(smbpass) ));

	ZERO_STRUCTP(id10);
	init_sam_user_info10(id10, pdb_get_acct_ctrl(smbpass) );

	samr_clear_sam_passwd(smbpass);
	pdb_free_sam(smbpass);

	return True;
}

/*************************************************************************
 get_user_info_12. OK - this is the killer as it gives out password info.
 Ensure that this is only allowed on an encrypted connection with a root
 user. JRA. 
 *************************************************************************/

static uint32 get_user_info_12(pipes_struct *p, SAM_USER_INFO_12 * id12, uint32 user_rid)
{
	SAM_ACCOUNT *smbpass=NULL;
	BOOL ret;

	if (!p->ntlmssp_auth_validated)
		return NT_STATUS_ACCESS_DENIED;

	if (!(p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SIGN) || !(p->ntlmssp_chal_flags & NTLMSSP_NEGOTIATE_SEAL))
		return NT_STATUS_ACCESS_DENIED;

	/*
	 * Do *NOT* do become_root()/unbecome_root() here ! JRA.
	 */
	pdb_init_sam(&smbpass);

	ret = pdb_getsampwrid(smbpass, user_rid);

	if (ret == False) {
		DEBUG(4, ("User 0x%x not found\n", user_rid));
		pdb_free_sam(smbpass);
		return (geteuid() == (uid_t)0) ? NT_STATUS_NO_SUCH_USER : NT_STATUS_ACCESS_DENIED;
	}

	DEBUG(3,("User:[%s] 0x%x\n", pdb_get_username(smbpass), pdb_get_acct_ctrl(smbpass) ));

	if ( pdb_get_acct_ctrl(smbpass) & ACB_DISABLED) {
		pdb_free_sam(smbpass);
		return NT_STATUS_ACCOUNT_DISABLED;
	}

	ZERO_STRUCTP(id12);
	init_sam_user_info12(id12, pdb_get_lanman_passwd(smbpass), pdb_get_nt_passwd(smbpass));
	
	pdb_free_sam(smbpass);

	return NT_STATUS_NOPROBLEMO;
}

/*************************************************************************
 get_user_info_20
 *************************************************************************/

static BOOL get_user_info_20(SAM_USER_INFO_20 *id20, uint32 user_rid)
{
	SAM_ACCOUNT *sampass=NULL;
	BOOL ret;

	if (!pdb_rid_is_user(user_rid)) {
		DEBUG(4,("RID 0x%x is not a user RID\n", user_rid));
		return False;
	}

	pdb_init_sam(&sampass);

	become_root();
	ret = pdb_getsampwrid(sampass, user_rid);
	unbecome_root();

	if (ret == False) {
		DEBUG(4,("User 0x%x not found\n", user_rid));
		pdb_free_sam(sampass);
		return False;
	}

	samr_clear_sam_passwd(sampass);

	DEBUG(3,("User:[%s]\n",  pdb_get_username(sampass) ));

	ZERO_STRUCTP(id20);
	init_sam_user_info20A(id20, sampass);
	
	pdb_free_sam(sampass);

	return True;
}

/*************************************************************************
 get_user_info_21
 *************************************************************************/

static BOOL get_user_info_21(SAM_USER_INFO_21 *id21, uint32 user_rid)
{
	SAM_ACCOUNT *sampass=NULL;
	BOOL ret;

	if (!pdb_rid_is_user(user_rid)) {
		DEBUG(4,("RID 0x%x is not a user RID\n", user_rid));
		return False;
	}

	pdb_init_sam(&sampass);

	become_root();
	ret = pdb_getsampwrid(sampass, user_rid);
	unbecome_root();

	if (ret == False) {
		DEBUG(4,("User 0x%x not found\n", user_rid));
		pdb_free_sam(sampass);
		return False;
	}

	samr_clear_sam_passwd(sampass);

	DEBUG(3,("User:[%s]\n",  pdb_get_username(sampass) ));

	ZERO_STRUCTP(id21);
	init_sam_user_info21A(id21, sampass);
	
	pdb_free_sam(sampass);

	return True;
}

/*******************************************************************
 _samr_query_userinfo
 ********************************************************************/

uint32 _samr_query_userinfo(pipes_struct *p, SAMR_Q_QUERY_USERINFO *q_u, SAMR_R_QUERY_USERINFO *r_u)
{
	SAM_USERINFO_CTR *ctr;
	uint32 rid = 0;
	struct samr_info *info = NULL;

	r_u->status=NT_STATUS_NOPROBLEMO;

	/* search for the handle */
	if (!find_policy_by_hnd(p, &q_u->pol, (void **)&info))
		return NT_STATUS_INVALID_HANDLE;

	/* find the user's rid */
	if ((rid = get_lsa_policy_samr_rid(info)) == 0xffffffff)
		return NT_STATUS_OBJECT_TYPE_MISMATCH;

	DEBUG(5,("_samr_query_userinfo: rid:0x%x\n", rid));

	ctr = (SAM_USERINFO_CTR *)talloc_zero(p->mem_ctx, sizeof(SAM_USERINFO_CTR));
	if (!ctr)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(ctr);

	/* ok!  user info levels (lots: see MSDEV help), off we go... */
	ctr->switch_value = q_u->switch_value;

	switch (q_u->switch_value) {
	case 0x10:
		ctr->info.id10 = (SAM_USER_INFO_10 *)talloc_zero(p->mem_ctx, sizeof(SAM_USER_INFO_10));
		if (ctr->info.id10 == NULL)
			return NT_STATUS_NO_MEMORY;

		if (!get_user_info_10(ctr->info.id10, rid))
			return NT_STATUS_NO_SUCH_USER;
		break;

#if 0
/* whoops - got this wrong.  i think.  or don't understand what's happening. */
        case 0x11:
        {
            NTTIME expire;
            info = (void *)&id11;

            expire.low = 0xffffffff;
            expire.high = 0x7fffffff;

            ctr->info.id = (SAM_USER_INFO_11 *)talloc_zero(p->mem_ctx,
                                    sizeof
                                    (*ctr->
                                     info.
                                     id11));
	    ZERO_STRUCTP(ctr->info.id11);
            init_sam_user_info11(ctr->info.id11, &expire,
                         "BROOKFIELDS$",    /* name */
                         0x03ef,    /* user rid */
                         0x201, /* group rid */
                         0x0080);   /* acb info */

            break;
        }
#endif

	case 0x12:
		ctr->info.id12 = (SAM_USER_INFO_12 *)talloc_zero(p->mem_ctx, sizeof(SAM_USER_INFO_12));
		if (ctr->info.id12 == NULL)
			return NT_STATUS_NO_MEMORY;

		if ((r_u->status = get_user_info_12(p, ctr->info.id12, rid)) != NT_STATUS_NOPROBLEMO)
			return r_u->status;
		break;

	case 20:
		ctr->info.id20 = (SAM_USER_INFO_20 *)talloc_zero(p->mem_ctx,sizeof(SAM_USER_INFO_20));
		if (ctr->info.id20 == NULL)
			return NT_STATUS_NO_MEMORY;
		if (!get_user_info_20(ctr->info.id20, rid))
			return NT_STATUS_NO_SUCH_USER;
		break;

	case 21:
		ctr->info.id21 = (SAM_USER_INFO_21 *)talloc_zero(p->mem_ctx,sizeof(SAM_USER_INFO_21));
		if (ctr->info.id21 == NULL)
			return NT_STATUS_NO_MEMORY;
		if (!get_user_info_21(ctr->info.id21, rid))
			return NT_STATUS_NO_SUCH_USER;
		break;

	default:
		return NT_STATUS_INVALID_INFO_CLASS;
	}

	init_samr_r_query_userinfo(r_u, ctr, r_u->status);

	DEBUG(5,("_samr_query_userinfo: %d\n", __LINE__));

	return r_u->status;
}

/*******************************************************************
 samr_reply_query_usergroups
 ********************************************************************/

uint32 _samr_query_usergroups(pipes_struct *p, SAMR_Q_QUERY_USERGROUPS *q_u, SAMR_R_QUERY_USERGROUPS *r_u)
{
	SAM_ACCOUNT *sam_pass=NULL;
	DOM_GID *gids = NULL;
	int num_groups = 0;
	pstring groups;
	uint32 rid;
	struct samr_info *info = NULL;
	BOOL ret;

	r_u->status = NT_STATUS_NOPROBLEMO;

	DEBUG(5,("_samr_query_usergroups: %d\n", __LINE__));

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, &q_u->pol, (void **)&info))
		return NT_STATUS_INVALID_HANDLE;

	/* find the user's rid */
	if ((rid = get_lsa_policy_samr_rid(info)) == 0xffffffff)
		return NT_STATUS_OBJECT_TYPE_MISMATCH;

	pdb_init_sam(&sam_pass);

	become_root();
	ret = pdb_getsampwrid(sam_pass, rid);
	unbecome_root();

	if (ret == False) {
		samr_clear_sam_passwd(sam_pass);
		return NT_STATUS_NO_SUCH_USER;
	}

	get_domain_user_groups(groups, pdb_get_username(sam_pass));
	gids = NULL;
	num_groups = make_dom_gids(p->mem_ctx, groups, &gids);

	/* construct the response.  lkclXXXX: gids are not copied! */
	init_samr_r_query_usergroups(r_u, num_groups, gids, r_u->status);

	DEBUG(5,("_samr_query_usergroups: %d\n", __LINE__));
	
	samr_clear_sam_passwd(sam_pass);

	return r_u->status;
}

/*******************************************************************
 _samr_query_dom_info
 ********************************************************************/

uint32 _samr_query_dom_info(pipes_struct *p, SAMR_Q_QUERY_DOMAIN_INFO *q_u, SAMR_R_QUERY_DOMAIN_INFO *r_u)
{
    SAM_UNK_CTR *ctr;

	if ((ctr = (SAM_UNK_CTR *)talloc_zero(p->mem_ctx, sizeof(SAM_UNK_CTR))) == NULL)
		return NT_STATUS_NO_MEMORY;

    ZERO_STRUCTP(ctr);

    r_u->status = NT_STATUS_NOPROBLEMO;

    DEBUG(5,("_samr_query_dom_info: %d\n", __LINE__));

    /* find the policy handle.  open a policy on it. */
    if (!find_policy_by_hnd(p, &q_u->domain_pol, NULL))
        return NT_STATUS_INVALID_HANDLE;

    switch (q_u->switch_value) {
        case 0x01:
            init_unk_info1(&ctr->info.inf1);
            break;
        case 0x02:
			/* The time call below is to get a sequence number for the sam. FIXME !!! JRA. */
            init_unk_info2(&ctr->info.inf2, global_myworkgroup, global_myname, (uint32) time(NULL));
            break;
        case 0x03:
            init_unk_info3(&ctr->info.inf3);
            break;
        case 0x05:
            init_unk_info5(&ctr->info.inf5, global_myname);
            break;
        case 0x06:
            init_unk_info6(&ctr->info.inf6);
            break;
        case 0x07:
            init_unk_info7(&ctr->info.inf7);
            break;
        case 0x0c:
            init_unk_info12(&ctr->info.inf12);
            break;
        default:
            return NT_STATUS_INVALID_INFO_CLASS;
    }

    init_samr_r_query_dom_info(r_u, q_u->switch_value, ctr, NT_STATUS_NOPROBLEMO);

    DEBUG(5,("_samr_query_dom_info: %d\n", __LINE__));

    return r_u->status;
}

/*******************************************************************
 _api_samr_create_user
 ********************************************************************/

uint32 _api_samr_create_user(pipes_struct *p, SAMR_Q_CREATE_USER *q_u, SAMR_R_CREATE_USER *r_u)
{
	SAM_ACCOUNT *sam_pass=NULL;
	fstring mach_acct;
	pstring err_str;
	pstring msg_str;
	int local_flags=0;
	DOM_SID sid;
	pstring add_script;
	POLICY_HND dom_pol = q_u->domain_pol;
	UNISTR2 user_account = q_u->uni_name;
	uint16 acb_info = q_u->acb_info;
	POLICY_HND *user_pol = &r_u->user_pol;
	struct samr_info *info = NULL;
	BOOL ret;

	/* find the policy handle.  open a policy on it. */
	if (!find_policy_by_hnd(p, &dom_pol, NULL))
		return NT_STATUS_INVALID_HANDLE;

	/* find the machine account: tell the caller if it exists.
	  lkclXXXX i have *no* idea if this is a problem or not
 	  or even if you are supposed to construct a different
	  reply if the account already exists...
	 */

	rpcstr_pull(mach_acct, user_account.buffer, sizeof(mach_acct), user_account.uni_str_len*2, 0);
	strlower(mach_acct);

	pdb_init_sam(&sam_pass);

	become_root();
	ret = pdb_getsampwnam(sam_pass, mach_acct);
	unbecome_root();
	if (ret == True) {
		/* machine account exists: say so */
		pdb_free_sam(sam_pass);
		return NT_STATUS_USER_EXISTS;
	}

	local_flags=LOCAL_ADD_USER|LOCAL_DISABLE_USER|LOCAL_SET_NO_PASSWORD;
	local_flags|= (acb_info & ACB_WSTRUST) ? LOCAL_TRUST_ACCOUNT:0;

	/*
	 * NB. VERY IMPORTANT ! This call must be done as the current pipe user,
	 * *NOT* surrounded by a become_root()/unbecome_root() call. This ensures
	 * that only people with write access to the smbpasswd file will be able
	 * to create a user. JRA.
	 */

	/*
	 * add the user in the /etc/passwd file or the unix authority system.
	 * We don't check if the smb_create_user() function succed or not for 2 reasons:
	 * a) local_password_change() checks for us if the /etc/passwd account really exists
	 * b) smb_create_user() would return an error if the account already exists
	 * and as it could return an error also if it can't create the account, it would be tricky.
	 *
	 * So we go the easy way, only check after if the account exists.
	 * JFM (2/3/2001), to clear any possible bad understanding (-:
	 */

	pstrcpy(add_script, lp_addmachine_script());

	if (!*add_script) {
		pstrcpy(add_script, lp_adduser_script());
	}

	if(*add_script) {
		int add_ret;
		all_string_sub(add_script, "%u", mach_acct, sizeof(mach_acct));
		add_ret = smbrun(add_script,NULL);
		DEBUG(3,("_api_samr_create_user: Running the command `%s' gave %d\n",add_script,add_ret));
	}

	/* add the user in the smbpasswd file or the Samba authority database */
	if (!local_password_change(mach_acct, local_flags, NULL, err_str,
	    sizeof(err_str), msg_str, sizeof(msg_str))) {
		DEBUG(0, ("%s\n", err_str));
		pdb_free_sam(sam_pass);
		return NT_STATUS_ACCESS_DENIED;
	}

	become_root();
	ret = pdb_getsampwnam(sam_pass, mach_acct);
 	unbecome_root();
 	if (ret == False) {
		/* account doesn't exist: say so */
		pdb_free_sam(sam_pass);
		return NT_STATUS_ACCESS_DENIED;
	}

	/* Get the domain SID stored in the domain policy */
	if(!get_lsa_policy_samr_sid(p, &dom_pol, &sid)) {
		pdb_free_sam(sam_pass);
		return NT_STATUS_INVALID_HANDLE;
	}

	/* append the user's RID to it */
	if(!sid_append_rid(&sid, pdb_get_user_rid(sam_pass) )) {
		pdb_free_sam(sam_pass);
		return NT_STATUS_NO_SUCH_USER;
	}

	/* associate the user's SID with the new handle. */
	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL) {
		pdb_free_sam(sam_pass);
		return NT_STATUS_NO_MEMORY;
	}

	ZERO_STRUCTP(info);
	info->sid = sid;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, user_pol, free_samr_info, (void *)info)) {
		pdb_free_sam(sam_pass);
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;
	}

	r_u->user_rid=sam_pass->user_rid;
	r_u->unknown_0 = 0x000703ff;

	pdb_free_sam(sam_pass);

	return NT_STATUS_NOPROBLEMO;
}

/*******************************************************************
 samr_reply_connect_anon
 ********************************************************************/

uint32 _samr_connect_anon(pipes_struct *p, SAMR_Q_CONNECT_ANON *q_u, SAMR_R_CONNECT_ANON *r_u)
{
	struct samr_info *info = NULL;

    /* set up the SAMR connect_anon response */

    r_u->status = NT_STATUS_NOPROBLEMO;

    /* associate the user's SID with the new handle. */
    if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
        return NT_STATUS_NO_MEMORY;

    ZERO_STRUCTP(info);
    info->status = q_u->unknown_0;

    /* get a (unique) handle.  open a policy on it. */
    if (!create_policy_hnd(p, &r_u->connect_pol, free_samr_info, (void *)info))
        return NT_STATUS_OBJECT_NAME_NOT_FOUND;

    return r_u->status;
}

/*******************************************************************
 samr_reply_connect
 ********************************************************************/

uint32 _samr_connect(pipes_struct *p, SAMR_Q_CONNECT *q_u, SAMR_R_CONNECT *r_u)
{
	struct samr_info *info = NULL;

    DEBUG(5,("_samr_connect: %d\n", __LINE__));

    r_u->status = NT_STATUS_NOPROBLEMO;

    /* associate the user's SID with the new handle. */
    if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
        return NT_STATUS_NO_MEMORY;

    ZERO_STRUCTP(info);
    info->status = q_u->access_mask;

    /* get a (unique) handle.  open a policy on it. */
    if (!create_policy_hnd(p, &r_u->connect_pol, free_samr_info, (void *)info))
        return NT_STATUS_OBJECT_NAME_NOT_FOUND;

    DEBUG(5,("_samr_connect: %d\n", __LINE__));

    return r_u->status;
}

/**********************************************************************
 api_samr_lookup_domain
 **********************************************************************/

uint32 _samr_lookup_domain(pipes_struct *p, SAMR_Q_LOOKUP_DOMAIN *q_u, SAMR_R_LOOKUP_DOMAIN *r_u)
{
    r_u->status = NT_STATUS_NOPROBLEMO;

    if (!find_policy_by_hnd(p, &q_u->connect_pol, NULL))
        return NT_STATUS_INVALID_HANDLE;

    /* assume the domain name sent is our global_myname and
       send global_sam_sid */
    init_samr_r_lookup_domain(r_u, &global_sam_sid, r_u->status);

    return r_u->status;
}

/******************************************************************
makes a SAMR_R_ENUM_DOMAINS structure.
********************************************************************/

static BOOL make_enum_domains(TALLOC_CTX *ctx, SAM_ENTRY **pp_sam,
			UNISTR2 **pp_uni_name, uint32 num_sam_entries, fstring doms[])
{
	uint32 i;
	SAM_ENTRY *sam;
	UNISTR2 *uni_name;

	DEBUG(5, ("make_enum_domains\n"));

	*pp_sam = NULL;
	*pp_uni_name = NULL;

	if (num_sam_entries == 0)
		return True;

	sam = (SAM_ENTRY *)talloc_zero(ctx, sizeof(SAM_ENTRY)*num_sam_entries);
	uni_name = (UNISTR2 *)talloc_zero(ctx, sizeof(UNISTR2)*num_sam_entries);

	if (sam == NULL || uni_name == NULL)
		return False;

	for (i = 0; i < num_sam_entries; i++) {
		int len = doms[i] != NULL ? strlen(doms[i]) : 0;

		init_sam_entry(&sam[i], len, 0);
		init_unistr2(&uni_name[i], doms[i], len);
	}

	*pp_sam = sam;
	*pp_uni_name = uni_name;

	return True;
}

/**********************************************************************
 api_samr_enum_domains
 **********************************************************************/

uint32 _samr_enum_domains(pipes_struct *p, SAMR_Q_ENUM_DOMAINS *q_u, SAMR_R_ENUM_DOMAINS *r_u)
{
	uint32 num_entries = 2;
	fstring dom[2];

	r_u->status = NT_STATUS_NOPROBLEMO;

	fstrcpy(dom[0],global_myworkgroup);
	fstrcpy(dom[1],"Builtin");

	if (!make_enum_domains(p->mem_ctx, &r_u->sam, &r_u->uni_dom_name, num_entries, dom))
		return NT_STATUS_NO_MEMORY;

	init_samr_r_enum_domains(r_u, q_u->start_idx + num_entries, num_entries);

	return r_u->status;
}

/*******************************************************************
 api_samr_open_alias
 ********************************************************************/

uint32 _api_samr_open_alias(pipes_struct *p, SAMR_Q_OPEN_ALIAS *q_u, SAMR_R_OPEN_ALIAS *r_u)
{
	DOM_SID sid;
	POLICY_HND domain_pol = q_u->dom_pol;
	uint32 alias_rid = q_u->rid_alias;
	POLICY_HND *alias_pol = &r_u->pol;
	struct samr_info *info = NULL;

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* get the domain policy. */
	if (!find_policy_by_hnd(p, &domain_pol, NULL))
		return NT_STATUS_INVALID_HANDLE;

	/* Get the domain SID stored in the domain policy */
	if(!get_lsa_policy_samr_sid(p, &domain_pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	/* append the alias' RID to it */
	if(!sid_append_rid(&sid, alias_rid))
		return NT_STATUS_NO_SUCH_USER;

	/*
	 * we should check if the rid really exist !!!
	 * JFM.
	 */

    /* associate the user's SID with the new handle. */
    if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
        return NT_STATUS_NO_MEMORY;

    ZERO_STRUCTP(info);
    info->sid = sid;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, alias_pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	return r_u->status;
}

/*******************************************************************
 set_user_info_10
 ********************************************************************/

static BOOL set_user_info_10(const SAM_USER_INFO_10 *id10, uint32 rid)
{
	SAM_ACCOUNT *pwd =NULL;
	BOOL ret;
	
	pdb_init_sam(&pwd);
	
	ret = pdb_getsampwrid(pwd, rid);
	
	if(ret==False) {
		pdb_free_sam(pwd);
		return False;
	}

	if (id10 == NULL) {
		DEBUG(5, ("set_user_info_10: NULL id10\n"));
		pdb_free_sam(pwd);
		return False;
	}

	pdb_set_acct_ctrl(pwd, id10->acb_info);

	if(!pdb_update_sam_account(pwd, True)) {
		pdb_free_sam(pwd);
		return False;
	}

	pdb_free_sam(pwd);

	return True;
}

/*******************************************************************
 set_user_info_12
 ********************************************************************/

static BOOL set_user_info_12(SAM_USER_INFO_12 *id12, uint32 rid)
{
	SAM_ACCOUNT *pwd = NULL;

	pdb_init_sam(&pwd);

	if(!pdb_getsampwrid(pwd, rid)) {
		pdb_free_sam(pwd);
		return False;
	}

	if (id12 == NULL) {
		DEBUG(2, ("set_user_info_12: id12 is NULL\n"));
		pdb_free_sam(pwd);
		return False;
	}
 
	pdb_set_lanman_passwd (pwd, id12->lm_pwd);
	pdb_set_nt_passwd     (pwd, id12->nt_pwd);
 
	if(!pdb_update_sam_account(pwd, True)) {
		pdb_free_sam(pwd);
		return False;
 	}

	pdb_free_sam(pwd);
	return True;
}

/*******************************************************************
 set_user_info_21
 ********************************************************************/

static BOOL set_user_info_21(SAM_USER_INFO_21 *id21, uint32 rid)
{
	SAM_ACCOUNT *pwd = NULL;
	SAM_ACCOUNT *new_pwd = NULL;
 
	if (id21 == NULL) {
		DEBUG(5, ("set_user_info_21: NULL id21\n"));
		return False;
	}
 
	pdb_init_sam(&pwd);
	pdb_init_sam(&new_pwd);
 
	if (!pdb_getsampwrid(pwd, rid)) {
		pdb_free_sam(pwd);
		pdb_free_sam(new_pwd);
		return False;
	}
 
	/* we make a copy so that we can modify stuff */
	copy_sam_passwd(new_pwd, pwd);
	copy_id21_to_sam_passwd(new_pwd, id21);
 
	/*
	 * The funny part about the previous two calls is
	 * that pwd still has the password hashes from the
	 * passdb entry.  These have not been updated from
	 * id21.  I don't know if they need to be set.    --jerry
	 */
 
	/* write the change out */
	if(!pdb_update_sam_account(new_pwd, True)) {
		pdb_free_sam(pwd);
		pdb_free_sam(new_pwd);
		return False;
 	}

	pdb_free_sam(pwd);
	pdb_free_sam(new_pwd);

	return True;
}

/*******************************************************************
 set_user_info_23
 ********************************************************************/

static BOOL set_user_info_23(SAM_USER_INFO_23 *id23, uint32 rid)
{
	SAM_ACCOUNT *pwd = NULL;
	SAM_ACCOUNT *new_pwd = NULL;
	uint8 nt_hash[16];
	uint8 lm_hash[16];
	pstring buf;
	uint32 len;
	uint16 acct_ctrl;
 
	if (id23 == NULL) {
		DEBUG(5, ("set_user_info_23: NULL id23\n"));
		return False;
	}
 
 	pdb_init_sam(&pwd);
	pdb_init_sam(&new_pwd);
 
	if (!pdb_getsampwrid(pwd, rid)) {
		pdb_free_sam(pwd);
		pdb_free_sam(new_pwd);
		return False;
 	}

	acct_ctrl = pdb_get_acct_ctrl(pwd);

	copy_sam_passwd(new_pwd, pwd);
	pdb_free_sam(pwd);
	
	copy_id23_to_sam_passwd(new_pwd, id23);
 
	if (!decode_pw_buffer((char*)id23->pass, buf, 256, &len, nt_hash, lm_hash)) {
		pdb_free_sam(new_pwd);
		return False;
 	}
  
	pdb_set_lanman_passwd (new_pwd, lm_hash);
	pdb_set_nt_passwd     (new_pwd, nt_hash);
 
	/* if it's a trust account, don't update /etc/passwd */
	if ( ( (acct_ctrl &  ACB_DOMTRUST) == ACB_DOMTRUST ) ||
	     ( (acct_ctrl &  ACB_WSTRUST) ==  ACB_WSTRUST) ||
	     ( (acct_ctrl &  ACB_SVRTRUST) ==  ACB_SVRTRUST) ) {
	     DEBUG(5, ("Changing trust account password, not updating /etc/passwd\n"));
	} else  {
		/* update the UNIX password */
		if (lp_unix_password_sync() )
			if(!chgpasswd(pdb_get_username(new_pwd), "", buf, True)) {
				pdb_free_sam(new_pwd);
				return False;
			}
	}
 
	memset(buf, 0, sizeof(buf));
 
	if(!pdb_update_sam_account(new_pwd, True)) {
		pdb_free_sam(new_pwd);
		return False;
	}
 
	pdb_free_sam(new_pwd);

	return True;
}

/*******************************************************************
 set_user_info_pw
 ********************************************************************/

static BOOL set_user_info_pw(char *pass, uint32 rid)
{
	SAM_ACCOUNT *pwd = NULL;
	uchar nt_hash[16];
	uchar lm_hash[16];
	uint32 len;
	pstring buf;
	uint16 acct_ctrl;
 
 	pdb_init_sam(&pwd);
 
	if (!pdb_getsampwrid(pwd, rid)) {
		pdb_free_sam(pwd);
		return False;
 	}
	
	acct_ctrl = pdb_get_acct_ctrl(pwd);

	memset(buf, 0, sizeof(buf));
 
	if (!decode_pw_buffer(pass, buf, 256, &len, nt_hash, lm_hash)) {
		pdb_free_sam(pwd);
		return False;
 	}

	pdb_set_lanman_passwd (pwd, lm_hash);
	pdb_set_nt_passwd     (pwd, nt_hash);
 
	/* if it's a trust account, don't update /etc/passwd */
	if ( ( (acct_ctrl &  ACB_DOMTRUST) == ACB_DOMTRUST ) ||
	     ( (acct_ctrl &  ACB_WSTRUST) ==  ACB_WSTRUST) ||
	     ( (acct_ctrl &  ACB_SVRTRUST) ==  ACB_SVRTRUST) ) {
	     DEBUG(5, ("Changing trust account password, not updating /etc/passwd\n"));
	} else {
		/* update the UNIX password */
		if (lp_unix_password_sync())
			if(!chgpasswd(pdb_get_username(pwd), "", buf, True)) {
				pdb_free_sam(pwd);
				return False;
			}
	}
 
	memset(buf, 0, sizeof(buf));
 
	DEBUG(5,("set_user_info_pw: pdb_update_sam_account()\n"));
 
	/* update the SAMBA password */
	if(!pdb_update_sam_account(pwd, True)) {
		pdb_free_sam(pwd);
		return False;
 	}

	pdb_free_sam(pwd);

	return True;
}

/*******************************************************************
 samr_reply_set_userinfo
 ********************************************************************/

uint32 _samr_set_userinfo(pipes_struct *p, SAMR_Q_SET_USERINFO *q_u, SAMR_R_SET_USERINFO *r_u)
{
	uint32 rid = 0x0;
	DOM_SID sid;
	struct current_user user;
	SAM_ACCOUNT *sam_pass=NULL;
	unsigned char sess_key[16];
	POLICY_HND *pol = &q_u->pol;
	uint16 switch_value = q_u->switch_value;
	SAM_USERINFO_CTR *ctr = q_u->ctr;
	BOOL ret;

	DEBUG(5, ("_samr_set_userinfo: %d\n", __LINE__));

	r_u->status = NT_STATUS_NOPROBLEMO;

	if (p->ntlmssp_auth_validated) 	{
		memcpy(&user, &p->pipe_user, sizeof(user));
	} else 	{
		extern struct current_user current_user;
		memcpy(&user, &current_user, sizeof(user));
	}

	/* find the policy handle.  open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	sid_split_rid(&sid, &rid);

	DEBUG(5, ("_samr_set_userinfo: rid:0x%x, level:%d\n", rid, switch_value));

	if (ctr == NULL) {
		DEBUG(5, ("_samr_set_userinfo: NULL info level\n"));
		return NT_STATUS_INVALID_INFO_CLASS;
	}


	pdb_init_sam(&sam_pass);

	/* 
	 * We need the NT hash of the user who is changing the user's password.
	 * This NT hash is used to generate a "user session key"
	 * This "user session key" is in turn used to encrypt/decrypt the user's password.
	 */

	become_root();
	ret = pdb_getsampwuid(sam_pass, user.uid);
	unbecome_root();
	if(ret == False) {
		DEBUG(0,("_samr_set_userinfo: Unable to get smbpasswd entry for uid %u\n", (unsigned int)user.uid ));
		pdb_free_sam(sam_pass);
		return NT_STATUS_ACCESS_DENIED;
	}
		
	memset(sess_key, '\0', 16);
	mdfour(sess_key, pdb_get_nt_passwd(sam_pass), 16);

	pdb_free_sam(sam_pass);

	/* ok!  user info levels (lots: see MSDEV help), off we go... */
	switch (switch_value) {
		case 0x12:
			if (!set_user_info_12(ctr->info.id12, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;

		case 24:
			SamOEMhash(ctr->info.id24->pass, sess_key, 516);

			dump_data(100, (char *)ctr->info.id24->pass, 516);

			if (!set_user_info_pw((char *)ctr->info.id24->pass, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;

		case 25:
#if 0
			/*
			 * Currently we don't really know how to unmarshall
			 * the level 25 struct, and the password encryption
			 * is different. This is a placeholder for when we
			 * do understand it. In the meantime just return INVALID
			 * info level and W2K SP2 drops down to level 23... JRA.
			 */

			SamOEMhash(ctr->info.id25->pass, sess_key, 532);

			dump_data(100, (char *)ctr->info.id25->pass, 532);

			if (!set_user_info_pw(ctr->info.id25->pass, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;
#endif
			return NT_STATUS_INVALID_INFO_CLASS;

		case 23:
			SamOEMhash(ctr->info.id23->pass, sess_key, 516);

			dump_data(100, (char *)ctr->info.id23->pass, 516);

			if (!set_user_info_23(ctr->info.id23, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;

		default:
			return NT_STATUS_INVALID_INFO_CLASS;
	}

	return r_u->status;
}

/*******************************************************************
 samr_reply_set_userinfo2
 ********************************************************************/

uint32 _samr_set_userinfo2(pipes_struct *p, SAMR_Q_SET_USERINFO2 *q_u, SAMR_R_SET_USERINFO2 *r_u)
{
	DOM_SID sid;
	uint32 rid = 0x0;
	SAM_USERINFO_CTR *ctr = q_u->ctr;
	POLICY_HND *pol = &q_u->pol;
	uint16 switch_value = q_u->switch_value;

	DEBUG(5, ("samr_reply_set_userinfo2: %d\n", __LINE__));

	r_u->status = NT_STATUS_NOPROBLEMO;

	/* find the policy handle.  open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, pol, &sid))
		return NT_STATUS_INVALID_HANDLE;

	sid_split_rid(&sid, &rid);

	DEBUG(5, ("samr_reply_set_userinfo2: rid:0x%x\n", rid));

	if (ctr == NULL) {
		DEBUG(5, ("samr_reply_set_userinfo2: NULL info level\n"));
		return NT_STATUS_INVALID_INFO_CLASS;
	}

	switch_value=ctr->switch_value;

	/* ok!  user info levels (lots: see MSDEV help), off we go... */
	switch (switch_value) {
		case 21:
			if (!set_user_info_21(ctr->info.id21, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;
		case 16:
			if (!set_user_info_10(ctr->info.id10, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;
		case 18:
			/* Used by AS/U JRA. */
			if (!set_user_info_12(ctr->info.id12, rid))
				return NT_STATUS_ACCESS_DENIED;
			break;
		default:
			return NT_STATUS_INVALID_INFO_CLASS;
	}

	return r_u->status;
}

/*********************************************************************
 _samr_query_aliasmem
*********************************************************************/

uint32 _samr_query_useraliases(pipes_struct *p, SAMR_Q_QUERY_USERALIASES *q_u, SAMR_R_QUERY_USERALIASES *r_u)
{
	uint32 *rid=NULL;
	int num_rids;
	
	num_rids = 1;
	rid=(uint32 *)talloc_zero(p->mem_ctx, num_rids*sizeof(uint32));
	if (rid==NULL)
		return NT_STATUS_NO_MEMORY;
	
	/* until i see a real useraliases query, we fack one up */

	rid[0] = BUILTIN_ALIAS_RID_USERS;

	init_samr_r_query_useraliases(r_u, num_rids, rid, NT_STATUS_NOPROBLEMO);

	return NT_STATUS_NOPROBLEMO;

}

/*********************************************************************
 _samr_query_aliasmem
*********************************************************************/

uint32 _samr_query_aliasmem(pipes_struct *p, SAMR_Q_QUERY_ALIASMEM *q_u, SAMR_R_QUERY_ALIASMEM *r_u)
{
	int i;

	GROUP_MAP map;
	int num_uids = 0;
	DOM_SID2 *sid;
	uid_t *uid=NULL;

	DOM_SID alias_sid;
	DOM_SID als_sid;
	uint32 alias_rid;
	fstring alias_sid_str;
	DOM_SID temp_sid;


	/* find the policy handle.  open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->alias_pol, &alias_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	sid_copy(&als_sid, &alias_sid);
	sid_to_string(alias_sid_str, &alias_sid);
	sid_split_rid(&alias_sid, &alias_rid);

	DEBUG(10, ("sid is %s\n", alias_sid_str));

	if (sid_equal(&alias_sid, &global_sid_Builtin)) {
		DEBUG(10, ("lookup on Builtin SID (S-1-5-32)\n"));
		if(!get_builtin_group_from_sid(als_sid, &map))
			return NT_STATUS_NO_SUCH_ALIAS;
	} else {
		if (sid_equal(&alias_sid, &global_sam_sid)) {
			DEBUG(10, ("lookup on Server SID\n"));
			if(!get_local_group_from_sid(als_sid, &map))
				return NT_STATUS_NO_SUCH_ALIAS;
		}
	}

	if(!get_uid_list_of_group(map.gid, &uid, &num_uids))
		return NT_STATUS_NO_SUCH_ALIAS;

	DEBUG(10, ("sid is %s\n", alias_sid_str));
	sid = (DOM_SID2 *)talloc_zero(p->mem_ctx, sizeof(DOM_SID2) * num_uids);	
	if (num_uids!=0 && sid == NULL) 
		return NT_STATUS_NO_MEMORY;

	for (i = 0; i < num_uids; i++) {
		sid_copy(&temp_sid, &global_sam_sid);
		sid_append_rid(&temp_sid, pdb_uid_to_user_rid(uid[i]));
		
		init_dom_sid2(&sid[i], &temp_sid);
	}

	DEBUG(10, ("sid is %s\n", alias_sid_str));
	init_samr_r_query_aliasmem(r_u, num_uids, sid, NT_STATUS_NOPROBLEMO);

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_query_groupmem
*********************************************************************/

uint32 _samr_query_groupmem(pipes_struct *p, SAMR_Q_QUERY_GROUPMEM *q_u, SAMR_R_QUERY_GROUPMEM *r_u)
{
	int num_uids = 0;
	int i;
	DOM_SID group_sid;
	uint32 group_rid;
	fstring group_sid_str;
	uid_t *uid=NULL;
	
	GROUP_MAP map;

	uint32 *rid=NULL;
	uint32 *attr=NULL;


	/* find the policy handle.  open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->group_pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	/* todo: change to use sid_compare_front */

	sid_split_rid(&group_sid, &group_rid);
	sid_to_string(group_sid_str, &group_sid);
	DEBUG(10, ("sid is %s\n", group_sid_str));

	/* can we get a query for an SID outside our domain ? */
	if (!sid_equal(&group_sid, &global_sam_sid))
		return NT_STATUS_NO_SUCH_GROUP;

	sid_append_rid(&group_sid, group_rid);
	DEBUG(10, ("lookup on Domain SID\n"));

	if(!get_domain_group_from_sid(group_sid, &map))
		return NT_STATUS_NO_SUCH_GROUP;

	if(!get_uid_list_of_group(map.gid, &uid, &num_uids))
		return NT_STATUS_NO_SUCH_GROUP;

	rid=talloc_zero(p->mem_ctx, sizeof(uint32)*num_uids);
	attr=talloc_zero(p->mem_ctx, sizeof(uint32)*num_uids);
	
	if (num_uids!=0 && (rid==NULL || attr==NULL))
		return NT_STATUS_NO_MEMORY;
	
	for (i=0; i<num_uids; i++) {
		rid[i]=pdb_uid_to_user_rid(uid[i]);
		attr[i] = SID_NAME_USER;		
	}

	init_samr_r_query_groupmem(r_u, num_uids, rid, attr, NT_STATUS_NOPROBLEMO);

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_add_aliasmem
*********************************************************************/

uint32 _samr_add_aliasmem(pipes_struct *p, SAMR_Q_ADD_ALIASMEM *q_u, SAMR_R_ADD_ALIASMEM *r_u)
{
	DOM_SID alias_sid;
	fstring alias_sid_str;
	uid_t uid;
	struct passwd *pwd;
	struct group *grp;
	fstring grp_name;
	uint32 rid;
	GROUP_MAP map;

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->alias_pol, &alias_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	sid_to_string(alias_sid_str, &alias_sid);
	DEBUG(10, ("sid is %s\n", alias_sid_str));

	if (sid_compare(&alias_sid, &global_sam_sid)>0) {
		DEBUG(10, ("adding member on Server SID\n"));
		if(!get_local_group_from_sid(alias_sid, &map))
			return NT_STATUS_NO_SUCH_ALIAS;
	
	} else {
		if (sid_compare(&alias_sid, &global_sid_Builtin)>0) {
			DEBUG(10, ("adding member on BUILTIN SID\n"));
			if( !get_builtin_group_from_sid(alias_sid, &map))
				return NT_STATUS_NO_SUCH_ALIAS;

		} else
			return NT_STATUS_NO_SUCH_ALIAS;
	}
	
	sid_split_rid(&q_u->sid.sid, &rid);
	uid=pdb_user_rid_to_uid(rid);

	if ((pwd=getpwuid(uid)) == NULL)
		return NT_STATUS_NO_SUCH_USER;

	if ((grp=getgrgid(map.gid)) == NULL)
		return NT_STATUS_NO_SUCH_ALIAS;

	/* we need to copy the name otherwise it's overloaded in user_in_group_list */
	fstrcpy(grp_name, grp->gr_name);

	/* if the user is already in the group */
	if(user_in_group_list(pwd->pw_name, grp_name))
		return NT_STATUS_MEMBER_IN_ALIAS;

	/* 
	 * ok, the group exist, the user exist, the user is not in the group,
	 * we can (finally) add it to the group !
	 */
	smb_add_user_group(grp_name, pwd->pw_name);

	/* check if the user has been added then ... */
	if(!user_in_group_list(pwd->pw_name, grp_name))
		return NT_STATUS_MEMBER_NOT_IN_ALIAS;	/* don't know what to reply else */

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_del_aliasmem
*********************************************************************/

uint32 _samr_del_aliasmem(pipes_struct *p, SAMR_Q_DEL_ALIASMEM *q_u, SAMR_R_DEL_ALIASMEM *r_u)
{
  DEBUG(0,("_samr_del_aliasmem: Not yet implemented.\n"));
  return False;
}

/*********************************************************************
 _samr_add_groupmem
*********************************************************************/

uint32 _samr_add_groupmem(pipes_struct *p, SAMR_Q_ADD_GROUPMEM *q_u, SAMR_R_ADD_GROUPMEM *r_u)
{
	DOM_SID group_sid;
	fstring group_sid_str;
	struct passwd *pwd;
	struct group *grp;
	fstring grp_name;
	GROUP_MAP map;

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	sid_to_string(group_sid_str, &group_sid);
	DEBUG(10, ("sid is %s\n", group_sid_str));

	if (sid_compare(&group_sid, &global_sam_sid)<=0)
		return NT_STATUS_NO_SUCH_GROUP;

	DEBUG(10, ("lookup on Domain SID\n"));

	if(!get_domain_group_from_sid(group_sid, &map))
		return NT_STATUS_NO_SUCH_GROUP;

	if ((pwd=getpwuid(pdb_user_rid_to_uid(q_u->rid))) ==NULL)
		return NT_STATUS_NO_SUCH_USER;

	if ((grp=getgrgid(map.gid)) == NULL)
		return NT_STATUS_NO_SUCH_GROUP;

	/* we need to copy the name otherwise it's overloaded in user_in_group_list */
	fstrcpy(grp_name, grp->gr_name);

	/* if the user is already in the group */
	if(user_in_group_list(pwd->pw_name, grp_name))
		return NT_STATUS_MEMBER_IN_GROUP;

	/* 
	 * ok, the group exist, the user exist, the user is not in the group,
	 *
	 * we can (finally) add it to the group !
	 */

	smb_add_user_group(grp_name, pwd->pw_name);

	/* check if the user has been added then ... */
	if(!user_in_group_list(pwd->pw_name, grp_name))
		return NT_STATUS_MEMBER_NOT_IN_GROUP;		/* don't know what to reply else */

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_del_groupmem
*********************************************************************/

uint32 _samr_del_groupmem(pipes_struct *p, SAMR_Q_DEL_GROUPMEM *q_u, SAMR_R_DEL_GROUPMEM *r_u)
{
  DEBUG(0,("_samr_del_groupmem: Not yet implemented.\n"));
  return False;
}

/*********************************************************************
 _samr_delete_dom_user
*********************************************************************/

uint32 _samr_delete_dom_user(pipes_struct *p, SAMR_Q_DELETE_DOM_USER *q_u, SAMR_R_DELETE_DOM_USER *r_u )
{
  DEBUG(0,("_samr_delete_dom_user: Not yet implemented.\n"));
  return False;
}

/*********************************************************************
 _samr_delete_dom_group
*********************************************************************/

uint32 _samr_delete_dom_group(pipes_struct *p, SAMR_Q_DELETE_DOM_GROUP *q_u, SAMR_R_DELETE_DOM_GROUP *r_u)
{
	DOM_SID group_sid;
	DOM_SID dom_sid;
	uint32 group_rid;
	fstring group_sid_str;
	gid_t gid;
	struct group *grp;
	GROUP_MAP map;

	DEBUG(5, ("samr_delete_dom_group: %d\n", __LINE__));

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->group_pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	sid_copy(&dom_sid, &group_sid);
	sid_to_string(group_sid_str, &dom_sid);
	sid_split_rid(&dom_sid, &group_rid);

	DEBUG(10, ("sid is %s\n", group_sid_str));

	/* we check if it's our SID before deleting */
	if (!sid_equal(&dom_sid, &global_sam_sid))
		return NT_STATUS_NO_SUCH_GROUP;

	DEBUG(10, ("lookup on Domain SID\n"));

	if(!get_domain_group_from_sid(group_sid, &map))
		return NT_STATUS_NO_SUCH_ALIAS;

	gid=map.gid;

	/* check if group really exists */
	if ( (grp=getgrgid(gid)) == NULL)
		return NT_STATUS_NO_SUCH_GROUP;

	/* we can delete the UNIX group */
	smb_delete_group(grp->gr_name);

	/* check if the group has been successfully deleted */
	if ( (grp=getgrgid(gid)) != NULL)
		return NT_STATUS_ACCESS_DENIED;

	if(!group_map_remove(group_sid))
		return NT_STATUS_ACCESS_DENIED;

	if (!close_policy_hnd(p, &q_u->group_pol))
		return NT_STATUS_OBJECT_NAME_INVALID;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_delete_dom_alias
*********************************************************************/

uint32 _samr_delete_dom_alias(pipes_struct *p, SAMR_Q_DELETE_DOM_ALIAS *q_u, SAMR_R_DELETE_DOM_ALIAS *r_u)
{
	DOM_SID alias_sid;
	DOM_SID dom_sid;
	uint32 alias_rid;
	fstring alias_sid_str;
	gid_t gid;
	struct group *grp;
	GROUP_MAP map;

	DEBUG(5, ("_samr_delete_dom_alias: %d\n", __LINE__));

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->alias_pol, &alias_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	sid_copy(&dom_sid, &alias_sid);
	sid_to_string(alias_sid_str, &dom_sid);
	sid_split_rid(&dom_sid, &alias_rid);

	DEBUG(10, ("sid is %s\n", alias_sid_str));

	/* we check if it's our SID before deleting */
	if (!sid_equal(&dom_sid, &global_sam_sid))
		return NT_STATUS_NO_SUCH_ALIAS;

	DEBUG(10, ("lookup on Local SID\n"));

	if(!get_local_group_from_sid(alias_sid, &map))
		return NT_STATUS_NO_SUCH_ALIAS;

	gid=map.gid;

	/* check if group really exists */
	if ( (grp=getgrgid(gid)) == NULL)
		return NT_STATUS_NO_SUCH_ALIAS;

	/* we can delete the UNIX group */
	smb_delete_group(grp->gr_name);

	/* check if the group has been successfully deleted */
	if ( (grp=getgrgid(gid)) != NULL)
		return NT_STATUS_ACCESS_DENIED;

	/* don't check if we removed it as it could be an un-mapped group */
	group_map_remove(alias_sid);

	if (!close_policy_hnd(p, &q_u->alias_pol))
		return NT_STATUS_OBJECT_NAME_INVALID;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_create_dom_group
*********************************************************************/

uint32 _samr_create_dom_group(pipes_struct *p, SAMR_Q_CREATE_DOM_GROUP *q_u, SAMR_R_CREATE_DOM_GROUP *r_u)
{
	DOM_SID dom_sid;
	DOM_SID info_sid;
	fstring name;
	fstring sid_string;
	struct group *grp;
	struct samr_info *info;

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &dom_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	if (!sid_equal(&dom_sid, &global_sam_sid))
		return NT_STATUS_ACCESS_DENIED;

	/* TODO: check if allowed to create group and add a become_root/unbecome_root pair.*/

	unistr2_to_ascii(name, &q_u->uni_acct_desc, sizeof(name)-1);

	/* check if group already exist */
	if ((grp=getgrnam(name)) != NULL)
		return NT_STATUS_GROUP_EXISTS;

	/* we can create the UNIX group */
	smb_create_group(name);

	/* check if the group has been successfully created */
	if ((grp=getgrnam(name)) == NULL)
		return NT_STATUS_ACCESS_DENIED;

	r_u->rid=pdb_gid_to_group_rid(grp->gr_gid);

	/* add the group to the mapping table */
	if(!add_initial_entry(grp->gr_gid, sid_string, SID_NAME_DOM_GRP, name, NULL, SE_PRIV_NONE))
		return NT_STATUS_ACCESS_DENIED;

	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(info);

	sid_copy(&info_sid, &global_sam_sid);
	sid_append_rid(&info->sid, r_u->rid);
	sid_to_string(sid_string, &info->sid);

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, &r_u->pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_create_dom_alias
*********************************************************************/

uint32 _samr_create_dom_alias(pipes_struct *p, SAMR_Q_CREATE_DOM_ALIAS *q_u, SAMR_R_CREATE_DOM_ALIAS *r_u)
{
	DOM_SID dom_sid;
	fstring name;
	fstring sid_string;
	struct group *grp;
	struct samr_info *info;

	/* Find the policy handle. Open a policy on it. */
	if (!get_lsa_policy_samr_sid(p, &q_u->dom_pol, &dom_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	if (!sid_equal(&dom_sid, &global_sam_sid))
		return NT_STATUS_ACCESS_DENIED;

	/* TODO: check if allowed to create group  and add a become_root/unbecome_root pair.*/

	unistr2_to_ascii(name, &q_u->uni_acct_desc, sizeof(name)-1);

	/* check if group already exists */
	if ( (grp=getgrnam(name)) != NULL)
		return NT_STATUS_GROUP_EXISTS;

	/* we can create the UNIX group */
	smb_create_group(name);

	/* check if the group has been successfully created */
	if ((grp=getgrnam(name)) == NULL)
		return NT_STATUS_ACCESS_DENIED;

	r_u->rid=pdb_gid_to_group_rid(grp->gr_gid);

	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(info);

	sid_copy(&info->sid, &global_sam_sid);
	sid_append_rid(&info->sid, r_u->rid);
	sid_to_string(sid_string, &info->sid);

	/* add the group to the mapping table */
	if(!add_initial_entry(grp->gr_gid, sid_string, SID_NAME_ALIAS, name, NULL, SE_PRIV_NONE))
		return NT_STATUS_ACCESS_DENIED;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, &r_u->alias_pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_query_groupinfo

sends the name/comment pair of a domain group
level 1 send also the number of users of that group
*********************************************************************/

uint32 _samr_query_groupinfo(pipes_struct *p, SAMR_Q_QUERY_GROUPINFO *q_u, SAMR_R_QUERY_GROUPINFO *r_u)
{
	DOM_SID group_sid;
	GROUP_MAP map;
	uid_t *uid=NULL;
	int num_uids=0;
	GROUP_INFO_CTR *ctr;

	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	if (!get_domain_group_from_sid(group_sid, &map))
		return NT_STATUS_INVALID_HANDLE;
	
	ctr=(GROUP_INFO_CTR *)talloc_zero(p->mem_ctx, sizeof(GROUP_INFO_CTR));
	if (ctr==NULL)
		return NT_STATUS_NO_MEMORY;

	switch (q_u->switch_level) {
		case 1:
			ctr->switch_value1 = 1;
			if(!get_uid_list_of_group(map.gid, &uid, &num_uids))
				return NT_STATUS_NO_SUCH_GROUP;
			init_samr_group_info1(&ctr->group.info1, map.nt_name, map.comment, num_uids);
			safe_free(uid);
			break;
		case 4:
			ctr->switch_value1 = 4;
			init_samr_group_info4(&ctr->group.info4, map.comment);
			break;
		default:
			return NT_STATUS_INVALID_INFO_CLASS;
	}

	init_samr_r_query_groupinfo(r_u, ctr, NT_STATUS_NOPROBLEMO);

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_set_groupinfo
 
 update a domain group's comment.
*********************************************************************/

uint32 _samr_set_groupinfo(pipes_struct *p, SAMR_Q_SET_GROUPINFO *q_u, SAMR_R_SET_GROUPINFO *r_u)
{
	DOM_SID group_sid;
	GROUP_MAP map;
	GROUP_INFO_CTR *ctr;

	if (!get_lsa_policy_samr_sid(p, &q_u->pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	if (!get_domain_group_from_sid(group_sid, &map))
		return NT_STATUS_NO_SUCH_GROUP;
	
	ctr=q_u->ctr;

	switch (ctr->switch_value1) {
		case 1:
			unistr2_to_ascii(map.comment, &(ctr->group.info1.uni_acct_desc), sizeof(map.comment)-1);
			break;
		case 4:
			unistr2_to_ascii(map.comment, &(ctr->group.info4.uni_acct_desc), sizeof(map.comment)-1);
			break;
		default:
			return NT_STATUS_INVALID_INFO_CLASS;
	}

	if(!add_mapping_entry(&map, TDB_REPLACE))
		return NT_STATUS_NO_SUCH_GROUP;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_set_groupinfo
 
 update a domain group's comment.
*********************************************************************/

uint32 _samr_set_aliasinfo(pipes_struct *p, SAMR_Q_SET_ALIASINFO *q_u, SAMR_R_SET_ALIASINFO *r_u)
{
	DOM_SID group_sid;
	GROUP_MAP map;
	ALIAS_INFO_CTR *ctr;

	if (!get_lsa_policy_samr_sid(p, &q_u->alias_pol, &group_sid)) 
		return NT_STATUS_INVALID_HANDLE;

	if (!get_local_group_from_sid(group_sid, &map))
		return NT_STATUS_NO_SUCH_GROUP;
	
	ctr=&q_u->ctr;

	switch (ctr->switch_value1) {
		case 3:
			unistr2_to_ascii(map.comment, &(ctr->alias.info3.uni_acct_desc), sizeof(map.comment)-1);
			break;
		default:
			return NT_STATUS_INVALID_INFO_CLASS;
	}

	if(!add_mapping_entry(&map, TDB_REPLACE))
		return NT_STATUS_NO_SUCH_GROUP;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_get_dom_pwinfo
*********************************************************************/

uint32 _samr_get_dom_pwinfo(pipes_struct *p, SAMR_Q_GET_DOM_PWINFO *q_u, SAMR_R_GET_DOM_PWINFO *r_u)
{
	/* Actually, returning zeros here works quite well :-). */
	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_open_group
*********************************************************************/

uint32 _samr_open_group(pipes_struct *p, SAMR_Q_OPEN_GROUP *q_u, SAMR_R_OPEN_GROUP *r_u)
{
	DOM_SID sid;
	GROUP_MAP map;
	struct samr_info *info;
	fstring sid_string;

	if (!get_lsa_policy_samr_sid(p, &q_u->domain_pol, &sid)) 
		return NT_STATUS_INVALID_HANDLE;

	/* this should not be hard-coded like this */
	if (!sid_equal(&sid, &global_sam_sid))
		return NT_STATUS_ACCESS_DENIED;

	if ((info = (struct samr_info *)malloc(sizeof(struct samr_info))) == NULL)
		return NT_STATUS_NO_MEMORY;

	ZERO_STRUCTP(info);

	sid_copy(&info->sid, &global_sam_sid);
	sid_append_rid(&info->sid, q_u->rid_group);
	sid_to_string(sid_string, &info->sid);

	DEBUG(10, ("Opening SID: %s\n", sid_string));

	/* check if that group really exists */
	if (!get_domain_group_from_sid(info->sid, &map))
		return NT_STATUS_NO_SUCH_USER;

	/* get a (unique) handle.  open a policy on it. */
	if (!create_policy_hnd(p, &r_u->pol, free_samr_info, (void *)info))
		return NT_STATUS_OBJECT_NAME_NOT_FOUND;

	return NT_STATUS_NOPROBLEMO;
}

/*********************************************************************
 _samr_unknown_2d
*********************************************************************/

uint32 _samr_unknown_2d(pipes_struct *p, SAMR_Q_UNKNOWN_2D *q_u, SAMR_R_UNKNOWN_2D *r_u)
{
  DEBUG(0,("_samr_unknown_2d: Not yet implemented.\n"));
  return False;
}