first public release of samba4 code

(This used to be commit b0510b5428b3461aeb9bbe3cc95f62fc73e2b97f)

1 files changed, 1340 insertions, 0 deletions

diff --git a/source4/groupdb/mapping.c b/source4/groupdb/mapping.c
new file mode 100644
index 0000000000..958d6ded49
--- /dev/null
+++ b/source4/groupdb/mapping.c
@@ -0,0 +1,1340 @@
+/* 
+ *  Unix SMB/CIFS implementation.
+ *  RPC Pipe client / server routines
+ *  Copyright (C) Andrew Tridgell              1992-2000,
+ *  Copyright (C) Jean François Micouleau      1998-2001.
+ *  
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *  
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+
+static TDB_CONTEXT *tdb; /* used for driver files */
+
+#define DATABASE_VERSION_V1 1 /* native byte format. */
+#define DATABASE_VERSION_V2 2 /* le format. */
+
+#define GROUP_PREFIX "UNIXGROUP/"
+
+PRIVS privs[] = {
+	{SE_PRIV_NONE,           "no_privs",                  "No privilege"                    }, /* this one MUST be first */
+	{SE_PRIV_ADD_MACHINES,   "SeMachineAccountPrivilege", "Add workstations to the domain"  },
+	{SE_PRIV_SEC_PRIV,       "SeSecurityPrivilege",       "Manage the audit logs"           },
+	{SE_PRIV_TAKE_OWNER,     "SeTakeOwnershipPrivilege",  "Take ownership of file"          },
+	{SE_PRIV_ADD_USERS,      "SaAddUsers",                "Add users to the domain - Samba" },
+	{SE_PRIV_PRINT_OPERATOR, "SaPrintOp",                 "Add or remove printers - Samba"  },
+	{SE_PRIV_ALL,            "SaAllPrivs",                "all privileges"                  }
+};
+/*
+PRIVS privs[] = {
+	{  2, "SeCreateTokenPrivilege" },
+	{  3, "SeAssignPrimaryTokenPrivilege" },
+	{  4, "SeLockMemoryPrivilege" },
+	{  5, "SeIncreaseQuotaPrivilege" },
+	{  6, "SeMachineAccountPrivilege" },
+	{  7, "SeTcbPrivilege" },
+	{  8, "SeSecurityPrivilege" },
+	{  9, "SeTakeOwnershipPrivilege" },
+	{ 10, "SeLoadDriverPrivilege" },
+	{ 11, "SeSystemProfilePrivilege" },
+	{ 12, "SeSystemtimePrivilege" },
+	{ 13, "SeProfileSingleProcessPrivilege" },
+	{ 14, "SeIncreaseBasePriorityPrivilege" },
+	{ 15, "SeCreatePagefilePrivilege" },
+	{ 16, "SeCreatePermanentPrivilege" },
+	{ 17, "SeBackupPrivilege" },
+	{ 18, "SeRestorePrivilege" },
+	{ 19, "SeShutdownPrivilege" },
+	{ 20, "SeDebugPrivilege" },
+	{ 21, "SeAuditPrivilege" },
+	{ 22, "SeSystemEnvironmentPrivilege" },
+	{ 23, "SeChangeNotifyPrivilege" },
+	{ 24, "SeRemoteShutdownPrivilege" },
+	{ 25, "SeUndockPrivilege" },
+	{ 26, "SeSyncAgentPrivilege" },
+	{ 27, "SeEnableDelegationPrivilege" },
+};
+*/
+
+	/*
+	 * Those are not really privileges like the other ones.
+	 * They are handled in a special case and called
+	 * system privileges.
+	 *
+	 * SeNetworkLogonRight
+	 * SeUnsolicitedInputPrivilege
+	 * SeBatchLogonRight
+	 * SeServiceLogonRight
+	 * SeInteractiveLogonRight
+	 * SeDenyInteractiveLogonRight
+	 * SeDenyNetworkLogonRight
+	 * SeDenyBatchLogonRight
+	 * SeDenyBatchLogonRight
+	 */
+
+#if 0
+/****************************************************************************
+check if the user has the required privilege.
+****************************************************************************/
+static BOOL se_priv_access_check(NT_USER_TOKEN *token, uint32 privilege)
+{
+	/* no token, no privilege */
+	if (token==NULL)
+		return False;
+	
+	if ((token->privilege & privilege)==privilege)
+		return True;
+	
+	return False;
+}
+#endif
+
+/****************************************************************************
+dump the mapping group mapping to a text file
+****************************************************************************/
+char *decode_sid_name_use(fstring group, enum SID_NAME_USE name_use)
+{	
+	static fstring group_type;
+
+	switch(name_use) {
+		case SID_NAME_USER:
+			fstrcpy(group_type,"User");
+			break;
+		case SID_NAME_DOM_GRP:
+			fstrcpy(group_type,"Domain group");
+			break;
+		case SID_NAME_DOMAIN:
+			fstrcpy(group_type,"Domain");
+			break;
+		case SID_NAME_ALIAS:
+			fstrcpy(group_type,"Local group");
+			break;
+		case SID_NAME_WKN_GRP:
+			fstrcpy(group_type,"Builtin group");
+			break;
+		case SID_NAME_DELETED:
+			fstrcpy(group_type,"Deleted");
+			break;
+		case SID_NAME_INVALID:
+			fstrcpy(group_type,"Invalid");
+			break;
+		case SID_NAME_UNKNOWN:
+		default:
+			fstrcpy(group_type,"Unknown type");
+			break;
+	}
+	
+	fstrcpy(group, group_type);
+	return group_type;
+}
+
+/****************************************************************************
+initialise first time the mapping list - called from init_group_mapping()
+****************************************************************************/
+static BOOL default_group_mapping(void)
+{
+	DOM_SID sid_admins;
+	DOM_SID sid_users;
+	DOM_SID sid_guests;
+	fstring str_admins;
+	fstring str_users;
+	fstring str_guests;
+	LUID_ATTR set;
+
+	PRIVILEGE_SET privilege_none;
+	PRIVILEGE_SET privilege_all;
+	PRIVILEGE_SET privilege_print_op;
+
+	init_privilege(&privilege_none);
+	init_privilege(&privilege_all);
+	init_privilege(&privilege_print_op);
+
+	set.attr=0;
+	set.luid.high=0;
+	set.luid.low=SE_PRIV_PRINT_OPERATOR;
+	add_privilege(&privilege_print_op, set);
+
+	add_all_privilege(&privilege_all);
+
+	/* Add the Wellknown groups */
+
+	add_initial_entry(-1, "S-1-5-32-544", SID_NAME_ALIAS, "Administrators", "", privilege_all, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+	add_initial_entry(-1, "S-1-5-32-545", SID_NAME_ALIAS, "Users", "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+	add_initial_entry(-1, "S-1-5-32-546", SID_NAME_ALIAS, "Guests", "", privilege_none, PR_ACCESS_FROM_NETWORK);
+	add_initial_entry(-1, "S-1-5-32-547", SID_NAME_ALIAS, "Power Users", "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+
+	add_initial_entry(-1, "S-1-5-32-548", SID_NAME_ALIAS, "Account Operators", "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+	add_initial_entry(-1, "S-1-5-32-549", SID_NAME_ALIAS, "System Operators", "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+	add_initial_entry(-1, "S-1-5-32-550", SID_NAME_ALIAS, "Print Operators", "", privilege_print_op, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+	add_initial_entry(-1, "S-1-5-32-551", SID_NAME_ALIAS, "Backup Operators", "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+
+	add_initial_entry(-1, "S-1-5-32-552", SID_NAME_ALIAS, "Replicators", "", privilege_none, PR_ACCESS_FROM_NETWORK);
+
+	/* Add the defaults domain groups */
+
+	sid_copy(&sid_admins, get_global_sam_sid());
+	sid_append_rid(&sid_admins, DOMAIN_GROUP_RID_ADMINS);
+	sid_to_string(str_admins, &sid_admins);
+	add_initial_entry(-1, str_admins, SID_NAME_DOM_GRP, "Domain Admins", "", privilege_all, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+
+	sid_copy(&sid_users,  get_global_sam_sid());
+	sid_append_rid(&sid_users,  DOMAIN_GROUP_RID_USERS);
+	sid_to_string(str_users, &sid_users);
+	add_initial_entry(-1, str_users,  SID_NAME_DOM_GRP, "Domain Users",  "", privilege_none, PR_ACCESS_FROM_NETWORK|PR_LOG_ON_LOCALLY);
+
+	sid_copy(&sid_guests, get_global_sam_sid());
+	sid_append_rid(&sid_guests, DOMAIN_GROUP_RID_GUESTS);
+	sid_to_string(str_guests, &sid_guests);
+	add_initial_entry(-1, str_guests, SID_NAME_DOM_GRP, "Domain Guests", "", privilege_none, PR_ACCESS_FROM_NETWORK);
+
+	return True;
+}
+
+/****************************************************************************
+ Open the group mapping tdb.
+****************************************************************************/
+
+static BOOL init_group_mapping(void)
+{
+	static pid_t local_pid;
+	const char *vstring = "INFO/version";
+	int32 vers_id;
+	TALLOC_CTX *mem_ctx;
+	
+	if (tdb && local_pid == getpid())
+		return True;
+	mem_ctx = talloc_init("init_group_mapping");
+	if (!mem_ctx) {
+		DEBUG(0,("No memory to open group mapping database\n"));
+		return False;
+	}
+	tdb = tdb_open_log(lock_path(mem_ctx, "group_mapping.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
+	talloc_destroy(mem_ctx);
+	if (!tdb) {
+		DEBUG(0,("Failed to open group mapping database\n"));
+		return False;
+	}
+
+	local_pid = getpid();
+
+	/* handle a Samba upgrade */
+	tdb_lock_bystring(tdb, vstring, 0);
+
+	/* Cope with byte-reversed older versions of the db. */
+	vers_id = tdb_fetch_int32(tdb, vstring);
+	if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) {
+		/* Written on a bigendian machine with old fetch_int code. Save as le. */
+		tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
+		vers_id = DATABASE_VERSION_V2;
+	}
+
+	if (vers_id != DATABASE_VERSION_V2) {
+		tdb_traverse(tdb, tdb_traverse_delete_fn, NULL);
+		tdb_store_int32(tdb, vstring, DATABASE_VERSION_V2);
+	}
+
+	tdb_unlock_bystring(tdb, vstring);
+
+	/* write a list of default groups */
+	if(!default_group_mapping())
+		return False;
+
+	return True;
+}
+
+/****************************************************************************
+****************************************************************************/
+BOOL add_mapping_entry(GROUP_MAP *map, int flag)
+{
+	TDB_DATA kbuf, dbuf;
+	pstring key, buf;
+	fstring string_sid="";
+	int len;
+	int i;
+	PRIVILEGE_SET *set;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+	
+	sid_to_string(string_sid, &map->sid);
+
+	len = tdb_pack(buf, sizeof(buf), "ddffd",
+			map->gid, map->sid_name_use, map->nt_name, map->comment, map->systemaccount);
+
+	/* write the privilege list in the TDB database */
+
+	set=&map->priv_set;
+	len += tdb_pack(buf+len, sizeof(buf)-len, "d", set->count);
+	for (i=0; i<set->count; i++)
+		len += tdb_pack(buf+len, sizeof(buf)-len, "ddd", 
+				set->set[i].luid.low, set->set[i].luid.high, set->set[i].attr);
+
+	if (len > sizeof(buf))
+		return False;
+
+	slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
+
+	kbuf.dsize = strlen(key)+1;
+	kbuf.dptr = key;
+	dbuf.dsize = len;
+	dbuf.dptr = buf;
+	if (tdb_store(tdb, kbuf, dbuf, flag) != 0) return False;
+
+	return True;
+}
+
+/****************************************************************************
+initialise first time the mapping list
+****************************************************************************/
+BOOL add_initial_entry(gid_t gid, const char *sid, enum SID_NAME_USE sid_name_use,
+		       const char *nt_name, const char *comment, PRIVILEGE_SET priv_set, uint32 systemaccount)
+{
+	GROUP_MAP map;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+	
+	map.gid=gid;
+	if (!string_to_sid(&map.sid, sid)) {
+		DEBUG(0, ("string_to_sid failed: %s", sid));
+		return False;
+	}
+	
+	map.sid_name_use=sid_name_use;
+	fstrcpy(map.nt_name, nt_name);
+	fstrcpy(map.comment, comment);
+	map.systemaccount=systemaccount;
+
+	map.priv_set.count=priv_set.count;
+	map.priv_set.set=priv_set.set;
+
+	pdb_add_group_mapping_entry(&map);
+
+	return True;
+}
+
+/****************************************************************************
+initialise a privilege list
+****************************************************************************/
+void init_privilege(PRIVILEGE_SET *priv_set)
+{
+	priv_set->count=0;
+	priv_set->control=0;
+	priv_set->set=NULL;
+}
+
+/****************************************************************************
+free a privilege list
+****************************************************************************/
+BOOL free_privilege(PRIVILEGE_SET *priv_set)
+{
+	if (priv_set->count==0) {
+		DEBUG(100,("free_privilege: count=0, nothing to clear ?\n"));
+		return False;
+	}
+
+	if (priv_set->set==NULL) {
+		DEBUG(0,("free_privilege: list ptr is NULL, very strange !\n"));
+		return False;
+	}
+
+	safe_free(priv_set->set);
+	priv_set->count=0;
+	priv_set->control=0;
+	priv_set->set=NULL;
+
+	return True;
+}
+
+/****************************************************************************
+add a privilege to a privilege array
+****************************************************************************/
+BOOL add_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
+{
+	LUID_ATTR *new_set;
+
+	/* check if the privilege is not already in the list */
+	if (check_priv_in_privilege(priv_set, set))
+		return False;
+
+	/* we can allocate memory to add the new privilege */
+
+	new_set=(LUID_ATTR *)Realloc(priv_set->set, (priv_set->count+1)*(sizeof(LUID_ATTR)));
+	if (new_set==NULL) {
+		DEBUG(0,("add_privilege: could not Realloc memory to add a new privilege\n"));
+		return False;
+	}
+
+	new_set[priv_set->count].luid.high=set.luid.high;
+	new_set[priv_set->count].luid.low=set.luid.low;
+	new_set[priv_set->count].attr=set.attr;
+	
+	priv_set->count++;
+	priv_set->set=new_set;
+	
+	return True;	
+}
+
+/****************************************************************************
+add all the privileges to a privilege array
+****************************************************************************/
+BOOL add_all_privilege(PRIVILEGE_SET *priv_set)
+{
+	LUID_ATTR set;
+
+	set.attr=0;
+	set.luid.high=0;
+	
+	set.luid.low=SE_PRIV_ADD_USERS;
+	add_privilege(priv_set, set);
+
+	set.luid.low=SE_PRIV_ADD_MACHINES;
+	add_privilege(priv_set, set);
+
+	set.luid.low=SE_PRIV_PRINT_OPERATOR;
+	add_privilege(priv_set, set);
+	
+	return True;
+}
+
+/****************************************************************************
+check if the privilege list is empty
+****************************************************************************/
+BOOL check_empty_privilege(PRIVILEGE_SET *priv_set)
+{
+	return (priv_set->count == 0);
+}
+
+/****************************************************************************
+check if the privilege is in the privilege list
+****************************************************************************/
+BOOL check_priv_in_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
+{
+	int i;
+
+	/* if the list is empty, obviously we can't have it */
+	if (check_empty_privilege(priv_set))
+		return False;
+
+	for (i=0; i<priv_set->count; i++) {
+		LUID_ATTR *cur_set;
+
+		cur_set=&priv_set->set[i];
+		/* check only the low and high part. Checking the attr field has no meaning */
+		if( (cur_set->luid.low==set.luid.low) && (cur_set->luid.high==set.luid.high) )
+			return True;
+	}
+
+	return False;
+}
+
+/****************************************************************************
+remove a privilege from a privilege array
+****************************************************************************/
+BOOL remove_privilege(PRIVILEGE_SET *priv_set, LUID_ATTR set)
+{
+	LUID_ATTR *new_set;
+	LUID_ATTR *old_set;
+	int i,j;
+
+	/* check if the privilege is in the list */
+	if (!check_priv_in_privilege(priv_set, set))
+		return False;
+
+	/* special case if it's the only privilege in the list */
+	if (priv_set->count==1) {
+		free_privilege(priv_set);
+		init_privilege(priv_set);	
+	
+		return True;
+	}
+
+	/* 
+	 * the privilege is there, create a new list,
+	 * and copy the other privileges
+	 */
+
+	old_set=priv_set->set;
+
+	new_set=(LUID_ATTR *)malloc((priv_set->count-1)*(sizeof(LUID_ATTR)));
+	if (new_set==NULL) {
+		DEBUG(0,("remove_privilege: could not malloc memory for new privilege list\n"));
+		return False;
+	}
+
+	for (i=0, j=0; i<priv_set->count; i++) {
+		if ((old_set[i].luid.low==set.luid.low) && 
+		    (old_set[i].luid.high==set.luid.high)) {
+		    	continue;
+		}
+		
+		new_set[j].luid.low=old_set[i].luid.low;
+		new_set[j].luid.high=old_set[i].luid.high;
+		new_set[j].attr=old_set[i].attr;
+
+		j++;
+	}
+	
+	if (j!=priv_set->count-1) {
+		DEBUG(0,("remove_privilege: mismatch ! difference is not -1\n"));
+		DEBUGADD(0,("old count:%d, new count:%d\n", priv_set->count, j));
+		safe_free(new_set);
+		return False;
+	}
+		
+	/* ok everything is fine */
+	
+	priv_set->count--;
+	priv_set->set=new_set;
+	
+	safe_free(old_set);
+	
+	return True;	
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+BOOL get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map, BOOL with_priv)
+{
+	TDB_DATA kbuf, dbuf;
+	pstring key;
+	fstring string_sid;
+	int ret;
+	int i;
+	PRIVILEGE_SET *set;
+	
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	/* the key is the SID, retrieving is direct */
+
+	sid_to_string(string_sid, &sid);
+	slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
+
+	kbuf.dptr = key;
+	kbuf.dsize = strlen(key)+1;
+		
+	dbuf = tdb_fetch(tdb, kbuf);
+	if (!dbuf.dptr)
+		return False;
+
+	ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddffd",
+				&map->gid, &map->sid_name_use, &map->nt_name, &map->comment, &map->systemaccount);
+
+	set=&map->priv_set;
+	init_privilege(set);
+	ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "d", &set->count);
+
+	DEBUG(10,("get_group_map_from_sid: %d privileges\n", map->priv_set.count));
+
+	set->set = NULL;
+	if (set->count) {
+		set->set=(LUID_ATTR *)smb_xmalloc(set->count*sizeof(LUID_ATTR));
+	}
+
+	for (i=0; i<set->count; i++)
+		ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "ddd", 
+				&(set->set[i].luid.low), &(set->set[i].luid.high), &(set->set[i].attr));
+
+	SAFE_FREE(dbuf.dptr);
+	if (ret != dbuf.dsize) {
+		DEBUG(0,("get_group_map_from_sid: group mapping TDB corrupted ?\n"));
+		free_privilege(set);
+		return False;
+	}
+
+	/* we don't want the privileges */
+	if (with_priv==MAPPING_WITHOUT_PRIV)
+		free_privilege(set);
+
+	sid_copy(&map->sid, &sid);
+	
+	return True;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+BOOL get_group_map_from_gid(gid_t gid, GROUP_MAP *map, BOOL with_priv)
+{
+	TDB_DATA kbuf, dbuf, newkey;
+	fstring string_sid;
+	int ret;
+	int i;
+	PRIVILEGE_SET *set;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	/* we need to enumerate the TDB to find the GID */
+
+	for (kbuf = tdb_firstkey(tdb); 
+	     kbuf.dptr; 
+	     newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+		if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
+		
+		dbuf = tdb_fetch(tdb, kbuf);
+		if (!dbuf.dptr)
+			continue;
+
+		fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
+
+		string_to_sid(&map->sid, string_sid);
+		
+		ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddffd",
+				 &map->gid, &map->sid_name_use, &map->nt_name, &map->comment, &map->systemaccount);
+
+		set=&map->priv_set;
+		ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "d", &set->count);
+		set->set = NULL;
+		if (set->count) {
+			set->set=(LUID_ATTR *)smb_xmalloc(set->count*sizeof(LUID_ATTR));
+		}
+
+		for (i=0; i<set->count; i++)
+			ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "ddd", 
+					&(set->set[i].luid.low), &(set->set[i].luid.high), &(set->set[i].attr));
+
+		SAFE_FREE(dbuf.dptr);
+		if (ret != dbuf.dsize){
+			free_privilege(set);
+			continue;
+		}
+
+		if (gid==map->gid) {
+			if (!with_priv)
+				free_privilege(&map->priv_set);
+			return True;
+		}
+		
+		free_privilege(set);
+	}
+
+	return False;
+}
+
+/****************************************************************************
+ Return the sid and the type of the unix group.
+****************************************************************************/
+
+BOOL get_group_map_from_ntname(char *name, GROUP_MAP *map, BOOL with_priv)
+{
+	TDB_DATA kbuf, dbuf, newkey;
+	fstring string_sid;
+	int ret;
+	int i;
+	PRIVILEGE_SET *set;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("get_group_map_from_ntname:failed to initialize group mapping"));
+		return(False);
+	}
+
+	/* we need to enumerate the TDB to find the name */
+
+	for (kbuf = tdb_firstkey(tdb); 
+	     kbuf.dptr; 
+	     newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+		if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
+		
+		dbuf = tdb_fetch(tdb, kbuf);
+		if (!dbuf.dptr)
+			continue;
+
+		fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
+
+		string_to_sid(&map->sid, string_sid);
+		
+		ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddffd",
+				 &map->gid, &map->sid_name_use, &map->nt_name, &map->comment, &map->systemaccount);
+
+		set=&map->priv_set;
+		ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "d", &set->count);
+	
+		set->set=(LUID_ATTR *)malloc(set->count*sizeof(LUID_ATTR));
+		if (set->set==NULL) {
+			DEBUG(0,("get_group_map_from_ntname: could not allocate memory for privileges\n"));
+			return False;
+		}
+
+		for (i=0; i<set->count; i++)
+			ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "ddd", 
+					&(set->set[i].luid.low), &(set->set[i].luid.high), &(set->set[i].attr));
+
+		SAFE_FREE(dbuf.dptr);
+		if (ret != dbuf.dsize) {
+			free_privilege(set);
+			continue;
+		}
+
+		if (StrCaseCmp(name, map->nt_name)==0) {
+			if (!with_priv)
+				free_privilege(&map->priv_set);
+			return True;
+		}
+
+		free_privilege(set);
+	}
+
+	return False;
+}
+
+/****************************************************************************
+ Remove a group mapping entry.
+****************************************************************************/
+
+BOOL group_map_remove(DOM_SID sid)
+{
+	TDB_DATA kbuf, dbuf;
+	pstring key;
+	fstring string_sid;
+	
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	/* the key is the SID, retrieving is direct */
+
+	sid_to_string(string_sid, &sid);
+	slprintf(key, sizeof(key), "%s%s", GROUP_PREFIX, string_sid);
+
+	kbuf.dptr = key;
+	kbuf.dsize = strlen(key)+1;
+		
+	dbuf = tdb_fetch(tdb, kbuf);
+	if (!dbuf.dptr)
+		return False;
+	
+	SAFE_FREE(dbuf.dptr);
+
+	if(tdb_delete(tdb, kbuf) != TDB_SUCCESS)
+		return False;
+
+	return True;
+}
+
+/****************************************************************************
+ Enumerate the group mapping.
+****************************************************************************/
+
+BOOL enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
+			int *num_entries, BOOL unix_only, BOOL with_priv)
+{
+	TDB_DATA kbuf, dbuf, newkey;
+	fstring string_sid;
+	fstring group_type;
+	GROUP_MAP map;
+	GROUP_MAP *mapt;
+	int ret;
+	int entries=0;
+	int i;
+	PRIVILEGE_SET *set;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	*num_entries=0;
+	*rmap=NULL;
+
+	for (kbuf = tdb_firstkey(tdb); 
+	     kbuf.dptr; 
+	     newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+
+		if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0)
+			continue;
+		
+		dbuf = tdb_fetch(tdb, kbuf);
+		if (!dbuf.dptr)
+			continue;
+
+		fstrcpy(string_sid, kbuf.dptr+strlen(GROUP_PREFIX));
+				
+		ret = tdb_unpack(dbuf.dptr, dbuf.dsize, "ddffd",
+				 &map.gid, &map.sid_name_use, &map.nt_name, &map.comment, &map.systemaccount);
+
+		set=&map.priv_set;
+		init_privilege(set);
+		
+		ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "d", &set->count);
+	
+		if (set->count!=0) {
+			set->set=(LUID_ATTR *)malloc(set->count*sizeof(LUID_ATTR));
+			if (set->set==NULL) {
+				DEBUG(0,("enum_group_mapping: could not allocate memory for privileges\n"));
+				return False;
+			}
+		}
+
+		for (i=0; i<set->count; i++)
+			ret += tdb_unpack(dbuf.dptr+ret, dbuf.dsize-ret, "ddd", 
+					&(set->set[i].luid.low), &(set->set[i].luid.high), &(set->set[i].attr));
+
+		SAFE_FREE(dbuf.dptr);
+		if (ret != dbuf.dsize) {
+			DEBUG(11,("enum_group_mapping: error in memory size\n"));
+			free_privilege(set);
+			continue;
+		}
+
+		/* list only the type or everything if UNKNOWN */
+		if (sid_name_use!=SID_NAME_UNKNOWN  && sid_name_use!=map.sid_name_use) {
+			DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map.nt_name));
+			free_privilege(set);
+			continue;
+		}
+		
+		if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
+			DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
+			free_privilege(set);
+			continue;
+		}
+
+		string_to_sid(&map.sid, string_sid);
+		
+		decode_sid_name_use(group_type, map.sid_name_use);
+		DEBUG(11,("enum_group_mapping: returning group %s of type %s\n", map.nt_name ,group_type));
+
+		mapt=(GROUP_MAP *)Realloc((*rmap), (entries+1)*sizeof(GROUP_MAP));
+		if (!mapt) {
+			DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n"));
+			SAFE_FREE(*rmap);
+			free_privilege(set);
+			return False;
+		}
+		else
+			(*rmap) = mapt;
+
+		mapt[entries].gid = map.gid;
+		sid_copy( &mapt[entries].sid, &map.sid);
+		mapt[entries].sid_name_use = map.sid_name_use;
+		fstrcpy(mapt[entries].nt_name, map.nt_name);
+		fstrcpy(mapt[entries].comment, map.comment);
+		mapt[entries].systemaccount=map.systemaccount;
+		mapt[entries].priv_set.count=set->count;
+		mapt[entries].priv_set.control=set->control;
+		mapt[entries].priv_set.set=set->set;
+		if (!with_priv)
+			free_privilege(&(mapt[entries].priv_set));
+
+		entries++;
+	}
+
+	*num_entries=entries;
+
+	return True;
+}
+
+
+/****************************************************************************
+convert a privilege string to a privilege array
+****************************************************************************/
+void convert_priv_from_text(PRIVILEGE_SET *se_priv, char *privilege)
+{
+	pstring tok;
+	const char *p = privilege;
+	int i;
+	LUID_ATTR set;
+
+	/* By default no privilege */
+	init_privilege(se_priv);
+	
+	if (privilege==NULL)
+		return;
+
+	while(next_token(&p, tok, " ", sizeof(tok)) ) {
+		for (i=0; i<=PRIV_ALL_INDEX; i++) {
+			if (StrCaseCmp(privs[i].priv, tok)==0) {
+				set.attr=0;
+				set.luid.high=0;
+				set.luid.low=privs[i].se_priv;
+				add_privilege(se_priv, set);
+			}
+		}		
+	}
+}
+
+/****************************************************************************
+convert a privilege array to a privilege string
+****************************************************************************/
+void convert_priv_to_text(PRIVILEGE_SET *se_priv, char *privilege)
+{
+	int i,j;
+
+	if (privilege==NULL)
+		return;
+
+	ZERO_STRUCTP(privilege);
+
+	if (check_empty_privilege(se_priv)) {
+		fstrcat(privilege, "No privilege");
+		return;
+	}
+
+	for(i=0; i<se_priv->count; i++) {
+		j=1;
+		while (privs[j].se_priv!=se_priv->set[i].luid.low && j<=PRIV_ALL_INDEX) {
+			j++;
+		}
+
+		fstrcat(privilege, privs[j].priv);
+		fstrcat(privilege, " ");
+	}
+}
+
+
+/*
+ *
+ * High level functions
+ * better to use them than the lower ones.
+ *
+ * we are checking if the group is in the mapping file
+ * and if the group is an existing unix group
+ *
+ */
+
+/* get a domain group from it's SID */
+
+BOOL get_domain_group_from_sid(DOM_SID sid, GROUP_MAP *map, BOOL with_priv)
+{
+	struct group *grp;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	DEBUG(10, ("get_domain_group_from_sid\n"));
+
+	/* if the group is NOT in the database, it CAN NOT be a domain group */
+	if(!pdb_getgrsid(map, sid, with_priv))
+		return False;
+
+	DEBUG(10, ("get_domain_group_from_sid: SID found in the TDB\n"));
+
+	/* if it's not a domain group, continue */
+	if (map->sid_name_use!=SID_NAME_DOM_GRP) {
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
+ 	
+	if (map->gid==-1) {
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%d\n",map->gid));
+
+	if ( (grp=getgrgid(map->gid)) == NULL) {
+		DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
+
+	return True;
+}
+
+
+/* get a local (alias) group from it's SID */
+
+BOOL get_local_group_from_sid(DOM_SID sid, GROUP_MAP *map, BOOL with_priv)
+{
+	struct group *grp;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	/* The group is in the mapping table */
+	if(pdb_getgrsid(map, sid, with_priv)) {
+		if (map->sid_name_use!=SID_NAME_ALIAS) {
+			if (with_priv)
+				free_privilege(&map->priv_set);
+			return False;
+ 		}
+		
+		if (map->gid==-1) {
+			if (with_priv)
+				free_privilege(&map->priv_set);
+			return False;
+		}
+
+		if ( (grp=getgrgid(map->gid)) == NULL) {
+			if (with_priv)
+				free_privilege(&map->priv_set);
+			return False;
+		}
+	} else {
+		/* the group isn't in the mapping table.
+		 * make one based on the unix information */
+		uint32 alias_rid;
+
+		sid_peek_rid(&sid, &alias_rid);
+		map->gid=pdb_group_rid_to_gid(alias_rid);
+
+		if ((grp=getgrgid(map->gid)) == NULL)
+			return False;
+
+		map->sid_name_use=SID_NAME_ALIAS;
+		map->systemaccount=PR_ACCESS_FROM_NETWORK;
+
+		fstrcpy(map->nt_name, grp->gr_name);
+		fstrcpy(map->comment, "Local Unix Group");
+
+		init_privilege(&map->priv_set);
+
+		sid_copy(&map->sid, &sid);
+	}
+
+	return True;
+}
+
+/* get a builtin group from it's SID */
+
+BOOL get_builtin_group_from_sid(DOM_SID sid, GROUP_MAP *map, BOOL with_priv)
+{
+	struct group *grp;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	if(!pdb_getgrsid(map, sid, with_priv))
+		return False;
+
+	if (map->sid_name_use!=SID_NAME_WKN_GRP) {
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	if (map->gid==-1) {
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	if ( (grp=getgrgid(map->gid)) == NULL) {
+		if (with_priv)
+			free_privilege(&map->priv_set);
+		return False;
+	}
+
+	return True;
+}
+
+
+
+/****************************************************************************
+Returns a GROUP_MAP struct based on the gid.
+****************************************************************************/
+BOOL get_group_from_gid(gid_t gid, GROUP_MAP *map, BOOL with_priv)
+{
+	struct group *grp;
+
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	if ( (grp=getgrgid(gid)) == NULL)
+		return False;
+
+	/*
+	 * make a group map from scratch if doesn't exist.
+	 */
+	if (!pdb_getgrgid(map, gid, with_priv)) {
+		map->gid=gid;
+		map->sid_name_use=SID_NAME_ALIAS;
+		map->systemaccount=PR_ACCESS_FROM_NETWORK;
+		init_privilege(&map->priv_set);
+
+		/* interim solution until we have a last RID allocated */
+
+		sid_copy(&map->sid, get_global_sam_sid());
+		sid_append_rid(&map->sid, pdb_gid_to_group_rid(gid));
+
+		fstrcpy(map->nt_name, grp->gr_name);
+		fstrcpy(map->comment, "Local Unix Group");
+	}
+	
+	return True;
+}
+
+
+
+
+/****************************************************************************
+ Get the member users of a group and
+ all the users who have that group as primary.
+            
+ give back an array of uid
+ return the grand number of users
+
+
+ TODO: sort the list and remove duplicate. JFM.
+
+****************************************************************************/
+        
+BOOL get_uid_list_of_group(gid_t gid, uid_t **uid, int *num_uids)
+{
+	struct group *grp;
+	struct passwd *pwd;
+	int i=0;
+	char *gr;
+	uid_t *u;
+ 
+	if(!init_group_mapping()) {
+		DEBUG(0,("failed to initialize group mapping"));
+		return(False);
+	}
+
+	*num_uids = 0;
+	*uid=NULL;
+	
+	if ( (grp=getgrgid(gid)) == NULL)
+		return False;
+
+	gr = grp->gr_mem[0];
+	DEBUG(10, ("getting members\n"));
+        
+	while (gr && (*gr != (char)'\0')) {
+		u = Realloc((*uid), sizeof(uid_t)*(*num_uids+1));
+		if (!u) {
+			DEBUG(0,("get_uid_list_of_group: unable to enlarge uid list!\n"));
+			return False;
+		}
+		else (*uid) = u;
+
+		if( (pwd=getpwnam_alloc(gr)) !=NULL) {
+			(*uid)[*num_uids]=pwd->pw_uid;
+			(*num_uids)++;
+		}
+		passwd_free(&pwd);
+		gr = grp->gr_mem[++i];
+	}
+	DEBUG(10, ("got [%d] members\n", *num_uids));
+
+	setpwent();
+	while ((pwd=getpwent()) != NULL) {
+		if (pwd->pw_gid==gid) {
+			u = Realloc((*uid), sizeof(uid_t)*(*num_uids+1));
+			if (!u) {
+				DEBUG(0,("get_uid_list_of_group: unable to enlarge uid list!\n"));
+				return False;
+			}
+			else (*uid) = u;
+			(*uid)[*num_uids]=pwd->pw_uid;
+
+			(*num_uids)++;
+		}
+	}
+	endpwent();
+	DEBUG(10, ("got primary groups, members: [%d]\n", *num_uids));
+
+        return True;
+}
+
+/****************************************************************************
+ Create a UNIX group on demand.
+****************************************************************************/
+
+int smb_create_group(char *unix_group, gid_t *new_gid)
+{
+	pstring add_script;
+	int ret;
+	int fd = 0;
+
+	pstrcpy(add_script, lp_addgroup_script());
+	if (! *add_script) return -1;
+	pstring_sub(add_script, "%g", unix_group);
+	ret = smbrun(add_script, (new_gid!=NULL) ? &fd : NULL);
+	DEBUG(3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
+	if (ret != 0)
+		return ret;
+
+	if (fd != 0) {
+		fstring output;
+
+		*new_gid = 0;
+		if (read(fd, output, sizeof(output)) > 0) {
+			*new_gid = (gid_t)strtoul(output, NULL, 10);
+		}
+		close(fd);
+
+		if (*new_gid == 0) {
+			/* The output was garbage. We assume nobody
+                           will create group 0 via smbd. Now we try to
+                           get the group via getgrnam. */
+
+			struct group *grp = getgrnam(unix_group);
+			if (grp != NULL)
+				*new_gid = grp->gr_gid;
+			else
+				return 1;
+		}
+	}
+
+	return ret;
+}
+
+/****************************************************************************
+ Delete a UNIX group on demand.
+****************************************************************************/
+
+int smb_delete_group(char *unix_group)
+{
+	pstring del_script;
+	int ret;
+
+	pstrcpy(del_script, lp_delgroup_script());
+	if (! *del_script) return -1;
+	pstring_sub(del_script, "%g", unix_group);
+	ret = smbrun(del_script,NULL);
+	DEBUG(3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
+	return ret;
+}
+
+/****************************************************************************
+ Set a user's primary UNIX group.
+****************************************************************************/
+int smb_set_primary_group(const char *unix_group, const char* unix_user)
+{
+	pstring add_script;
+	int ret;
+
+	pstrcpy(add_script, lp_setprimarygroup_script());
+	if (! *add_script) return -1;
+	all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
+	all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
+	ret = smbrun(add_script,NULL);
+	DEBUG(3,("smb_set_primary_group: "
+		 "Running the command `%s' gave %d\n",add_script,ret));
+	return ret;
+}
+
+/****************************************************************************
+ Add a user to a UNIX group.
+****************************************************************************/
+
+int smb_add_user_group(char *unix_group, char *unix_user)
+{
+	pstring add_script;
+	int ret;
+
+	pstrcpy(add_script, lp_addusertogroup_script());
+	if (! *add_script) return -1;
+	pstring_sub(add_script, "%g", unix_group);
+	pstring_sub(add_script, "%u", unix_user);
+	ret = smbrun(add_script,NULL);
+	DEBUG(3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
+	return ret;
+}
+
+/****************************************************************************
+ Delete a user from a UNIX group
+****************************************************************************/
+
+int smb_delete_user_group(const char *unix_group, const char *unix_user)
+{
+	pstring del_script;
+	int ret;
+
+	pstrcpy(del_script, lp_deluserfromgroup_script());
+	if (! *del_script) return -1;
+	pstring_sub(del_script, "%g", unix_group);
+	pstring_sub(del_script, "%u", unix_user);
+	ret = smbrun(del_script,NULL);
+	DEBUG(3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
+	return ret;
+}
+
+
+NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
+				 DOM_SID sid, BOOL with_priv)
+{
+	return get_group_map_from_sid(sid, map, with_priv) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
+				 gid_t gid, BOOL with_priv)
+{
+	return get_group_map_from_gid(gid, map, with_priv) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
+				 char *name, BOOL with_priv)
+{
+	return get_group_map_from_ntname(name, map, with_priv) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_add_group_mapping_entry(struct pdb_methods *methods,
+						GROUP_MAP *map)
+{
+	return add_mapping_entry(map, TDB_INSERT) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_update_group_mapping_entry(struct pdb_methods *methods,
+						   GROUP_MAP *map)
+{
+	return add_mapping_entry(map, TDB_REPLACE) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_delete_group_mapping_entry(struct pdb_methods *methods,
+						   DOM_SID sid)
+{
+	return group_map_remove(sid) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+
+NTSTATUS pdb_default_enum_group_mapping(struct pdb_methods *methods,
+					   enum SID_NAME_USE sid_name_use,
+					   GROUP_MAP **rmap, int *num_entries,
+					   BOOL unix_only, BOOL with_priv)
+{
+	return enum_group_mapping(sid_name_use, rmap, num_entries, unix_only,
+				  with_priv) ?
+		NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
+}
+