s3-talloc Change TALLOC_ARRAY() to talloc_array()
[samba.git] / source3 / groupdb / mapping.c
index 6725165c3cfd4c82050213dac0113270b7f7d546..e37c951237d98d38b2356b30490a15d90dafbd72 100644 (file)
@@ -3,10 +3,12 @@
  *  RPC Pipe client / server routines
  *  Copyright (C) Andrew Tridgell              1992-2000,
  *  Copyright (C) Jean François Micouleau      1998-2001.
+ *  Copyright (C) Volker Lendecke              2006.
+ *  Copyright (C) Gerald Carter                2006.
  *  
  *  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
+ *  the Free Software Foundation; either version 3 of the License, or
  *  (at your option) any later version.
  *  
  *  This program is distributed in the hope that it will be useful,
  *  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.
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
 #include "includes.h"
+#include "system/passwd.h"
+#include "passdb.h"
+#include "groupdb/mapping.h"
+#include "../libcli/security/security.h"
+#include "lib/winbind_util.h"
+#include <tdb.h>
 
-static TDB_CONTEXT *tdb; /* used for driver files */
+static const struct mapping_backend *backend;
 
-#define DATABASE_VERSION_V1 1 /* native byte format. */
-#define DATABASE_VERSION_V2 2 /* le format. */
-
-#define GROUP_PREFIX "UNIXGROUP/"
-
-/* Alias memberships are stored reverse, as memberships. The performance
- * critical operation is to determine the aliases a SID is member of, not
- * listing alias members. So we store a list of alias SIDs a SID is member of
- * hanging of the member as key.
+/*
+  initialise a group mapping backend
  */
-#define MEMBEROF_PREFIX "MEMBEROF/"
-
-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"                  }
-};
-
-
-/****************************************************************************
-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)
+static bool init_group_mapping(void)
 {
-       DOM_SID sid_admins;
-       DOM_SID sid_users;
-       DOM_SID sid_guests;
-       fstring str_admins;
-       fstring str_users;
-       fstring str_guests;
-
-       /* Add the Wellknown groups */
-
-       add_initial_entry(-1, "S-1-5-32-544", SID_NAME_WKN_GRP, "Administrators", "");
-       add_initial_entry(-1, "S-1-5-32-545", SID_NAME_WKN_GRP, "Users", "");
-       add_initial_entry(-1, "S-1-5-32-546", SID_NAME_WKN_GRP, "Guests", "");
-       add_initial_entry(-1, "S-1-5-32-547", SID_NAME_WKN_GRP, "Power Users", "");
-       add_initial_entry(-1, "S-1-5-32-548", SID_NAME_WKN_GRP, "Account Operators", "");
-       add_initial_entry(-1, "S-1-5-32-549", SID_NAME_WKN_GRP, "System Operators", "");
-       add_initial_entry(-1, "S-1-5-32-550", SID_NAME_WKN_GRP, "Print Operators", "");
-       add_initial_entry(-1, "S-1-5-32-551", SID_NAME_WKN_GRP, "Backup Operators", "");
-       add_initial_entry(-1, "S-1-5-32-552", SID_NAME_WKN_GRP, "Replicators", "");
-
-       /* 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", "");
-
-       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",  "");
-
-       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", "");
-
-       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;
-       
-       if (tdb && local_pid == sys_getpid())
+       if (backend != NULL) {
+               /* already initialised */
                return True;
-       tdb = tdb_open_log(lock_path("group_mapping.tdb"), 0, TDB_DEFAULT, O_RDWR|O_CREAT, 0600);
-       if (!tdb) {
-               DEBUG(0,("Failed to open group mapping database\n"));
-               return False;
-       }
-
-       local_pid = sys_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);
-       }
+        backend = groupdb_tdb_init();
 
-       tdb_unlock_bystring(tdb, vstring);
-
-       /* write a list of default groups */
-       if(!default_group_mapping())
-               return False;
-
-       return True;
-}
-
-/****************************************************************************
-****************************************************************************/
-static BOOL add_mapping_entry(GROUP_MAP *map, int flag)
-{
-       TDB_DATA kbuf, dbuf;
-       pstring key, buf;
-       fstring string_sid="";
-       int len;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-       
-       sid_to_string(string_sid, &map->sid);
-
-       len = tdb_pack(buf, sizeof(buf), "ddff",
-                       map->gid, map->sid_name_use, map->nt_name, map->comment);
-
-       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;
+       return backend != NULL;
 }
 
 /****************************************************************************
 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)
+NTSTATUS add_initial_entry(gid_t gid, const char *sid, enum lsa_SidType sid_name_use, const char *nt_name, const char *comment)
 {
        GROUP_MAP map;
 
        if(!init_group_mapping()) {
                DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
+               return NT_STATUS_UNSUCCESSFUL;
        }
-       
+
        map.gid=gid;
        if (!string_to_sid(&map.sid, sid)) {
                DEBUG(0, ("string_to_sid failed: %s", sid));
-               return False;
+               return NT_STATUS_UNSUCCESSFUL;
        }
-       
+
        map.sid_name_use=sid_name_use;
        fstrcpy(map.nt_name, nt_name);
        fstrcpy(map.comment, comment);
 
        return pdb_add_group_mapping_entry(&map);
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_sid(DOM_SID sid, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring string_sid;
-       int ret = 0;
-       
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               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, "ddff",
-                               &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-       SAFE_FREE(dbuf.dptr);
-       
-       if ( ret == -1 ) {
-               DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
-               return False;
-       }
-
-       sid_copy(&map->sid, &sid);
-       
-       return True;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       int ret;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               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, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-               SAFE_FREE(dbuf.dptr);
-
-               if ( ret == -1 ) {
-                       DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n"));
-                       return False;
-               }
-       
-               if (gid==map->gid) {
-                       SAFE_FREE(kbuf.dptr);
-                       return True;
-               }
-       }
-
-       return False;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_ntname(const char *name, GROUP_MAP *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       int ret;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("get_group_map_from_ntname:failed to initialize group mapping\n"));
-               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, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
-
-               SAFE_FREE(dbuf.dptr);
-               
-               if ( ret == -1 ) {
-                       DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
-                       return False;
-               }
-
-               if (StrCaseCmp(name, map->nt_name)==0) {
-                       SAFE_FREE(kbuf.dptr);
-                       return True;
-               }
-       }
-
-       return False;
-}
-
-/****************************************************************************
- Remove a group mapping entry.
-****************************************************************************/
-
-static 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\n"));
-               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.
-****************************************************************************/
-
-static BOOL enum_group_mapping(enum SID_NAME_USE sid_name_use, GROUP_MAP **rmap,
-                       int *num_entries, BOOL unix_only)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       fstring string_sid;
-       fstring group_type;
-       GROUP_MAP map;
-       GROUP_MAP *mapt;
-       int ret;
-       int entries=0;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               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, "ddff",
-                                &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
-
-               SAFE_FREE(dbuf.dptr);
-
-               if ( ret == -1 ) {
-                       DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
-                       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));
-                       continue;
-               }
-
-               if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
-                       DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
-                       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);
-                       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);
-
-               entries++;
-
-       }
-
-       *num_entries=entries;
-
-       return True;
-}
-
-/* This operation happens on session setup, so it should better be fast. We
- * store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
-
-static NTSTATUS alias_memberships(const DOM_SID *sid, DOM_SID **sids, int *num)
-{
-       fstring key, string_sid;
-       TDB_DATA kbuf, dbuf;
-       const char *p;
-
-       *num = 0;
-       *sids = NULL;
-
-       if (!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       sid_to_string(string_sid, sid);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       dbuf = tdb_fetch(tdb, kbuf);
-
-       if (dbuf.dptr == NULL) {
-               return NT_STATUS_OK;
-       }
-
-       p = dbuf.dptr;
-
-       while (next_token(&p, string_sid, " ", sizeof(string_sid))) {
-
-               DOM_SID alias;
-
-               if (!string_to_sid(&alias, string_sid))
-                       continue;
-
-               add_sid_to_array(&alias, sids, num);
-
-               if (sids == NULL)
-                       return NT_STATUS_NO_MEMORY;
-       }
-
-       SAFE_FREE(dbuf.dptr);
-       return NT_STATUS_OK;
-}
-
-static BOOL is_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       DOM_SID *sids;
-       int i, num;
-
-       /* This feels the wrong way round, but the on-disk data structure
-        * dictates it this way. */
-       if (!NT_STATUS_IS_OK(alias_memberships(member, &sids, &num)))
-               return False;
-
-       for (i=0; i<num; i++) {
-               if (sid_compare(alias, &sids[i]) == 0) {
-                       SAFE_FREE(sids);
-                       return True;
-               }
-       }
-       SAFE_FREE(sids);
-       return False;
-}
-
-static NTSTATUS add_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       GROUP_MAP map;
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring string_sid;
-       char *new_memberstring;
-       int result;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       if (!get_group_map_from_sid(*alias, &map))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ( (map.sid_name_use != SID_NAME_ALIAS) &&
-            (map.sid_name_use != SID_NAME_WKN_GRP) )
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if (is_aliasmem(alias, member))
-               return NT_STATUS_MEMBER_IN_ALIAS;
-
-       sid_to_string(string_sid, member);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, string_sid);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       dbuf = tdb_fetch(tdb, kbuf);
-
-       sid_to_string(string_sid, alias);
-
-       if (dbuf.dptr != NULL) {
-               asprintf(&new_memberstring, "%s %s", (char *)(dbuf.dptr),
-                        string_sid);
-       } else {
-               new_memberstring = strdup(string_sid);
-       }
-
-       if (new_memberstring == NULL)
-               return NT_STATUS_NO_MEMORY;
-
-       SAFE_FREE(dbuf.dptr);
-       dbuf.dsize = strlen(new_memberstring)+1;
-       dbuf.dptr = new_memberstring;
-
-       result = tdb_store(tdb, kbuf, dbuf, 0);
-
-       SAFE_FREE(new_memberstring);
-
-       return (result == 0 ? NT_STATUS_OK : NT_STATUS_ACCESS_DENIED);
-}
-
-struct aliasmem_closure {
-       const DOM_SID *alias;
-       DOM_SID **sids;
-       int *num;
-};
-
-static int collect_aliasmem(TDB_CONTEXT *tdb_ctx, TDB_DATA key, TDB_DATA data,
-                           void *state)
-{
-       struct aliasmem_closure *closure = (struct aliasmem_closure *)state;
-       const char *p;
-       fstring alias_string;
-
-       if (strncmp(key.dptr, MEMBEROF_PREFIX,
-                   strlen(MEMBEROF_PREFIX)) != 0)
-               return 0;
-
-       p = data.dptr;
-
-       while (next_token(&p, alias_string, " ", sizeof(alias_string))) {
-
-               DOM_SID alias, member;
-               const char *member_string;
-               
-
-               if (!string_to_sid(&alias, alias_string))
-                       continue;
-
-               if (sid_compare(closure->alias, &alias) != 0)
-                       continue;
-
-               /* Ok, we found the alias we're looking for in the membership
-                * list currently scanned. The key represents the alias
-                * member. Add that. */
-
-               member_string = strchr(key.dptr, '/');
-
-               /* Above we tested for MEMBEROF_PREFIX which includes the
-                * slash. */
-
-               SMB_ASSERT(member_string != NULL);
-               member_string += 1;
-
-               if (!string_to_sid(&member, member_string))
-                       continue;
-               
-               add_sid_to_array(&member, closure->sids, closure->num);
-       }
-
-       return 0;
-}
-
-static NTSTATUS enum_aliasmem(const DOM_SID *alias, DOM_SID **sids, int *num)
-{
-       GROUP_MAP map;
-       struct aliasmem_closure closure;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return NT_STATUS_ACCESS_DENIED;
-       }
-
-       if (!get_group_map_from_sid(*alias, &map))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ( (map.sid_name_use != SID_NAME_ALIAS) &&
-            (map.sid_name_use != SID_NAME_WKN_GRP) )
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       *sids = NULL;
-       *num = 0;
-
-       closure.alias = alias;
-       closure.sids = sids;
-       closure.num = num;
-
-       tdb_traverse(tdb, collect_aliasmem, &closure);
-       return NT_STATUS_OK;
-}
-
-static NTSTATUS del_aliasmem(const DOM_SID *alias, const DOM_SID *member)
-{
-       NTSTATUS result;
-       DOM_SID *sids;
-       int i, num;
-       BOOL found = False;
-       char *member_string;
-       TDB_DATA kbuf, dbuf;
-       pstring key;
-       fstring sid_string;
-
-       result = alias_memberships(member, &sids, &num);
-
-       if (!NT_STATUS_IS_OK(result))
-               return result;
-
-       for (i=0; i<num; i++) {
-               if (sid_compare(&sids[i], alias) == 0) {
-                       found = True;
-                       break;
-               }
-       }
-
-       if (!found) {
-               SAFE_FREE(sids);
-               return NT_STATUS_MEMBER_NOT_IN_ALIAS;
-       }
-
-       if (i < num)
-               sids[i] = sids[num-1];
-
-       num -= 1;
-
-       sid_to_string(sid_string, member);
-       slprintf(key, sizeof(key), "%s%s", MEMBEROF_PREFIX, sid_string);
-
-       kbuf.dsize = strlen(key)+1;
-       kbuf.dptr = key;
-
-       if (num == 0)
-               return tdb_delete(tdb, kbuf) == 0 ?
-                       NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
-
-       member_string = strdup("");
-
-       if (member_string == NULL) {
-               SAFE_FREE(sids);
-               return NT_STATUS_NO_MEMORY;
-       }
-
-       for (i=0; i<num; i++) {
-               char *s = member_string;
-
-               sid_to_string(sid_string, &sids[i]);
-               asprintf(&member_string, "%s %s", s, sid_string);
-
-               SAFE_FREE(s);
-               if (member_string == NULL) {
-                       SAFE_FREE(sids);
-                       return NT_STATUS_NO_MEMORY;
-               }
-       }
-
-       dbuf.dsize = strlen(member_string)+1;
-       dbuf.dptr = member_string;
-
-       result = tdb_store(tdb, kbuf, dbuf, 0) == 0 ?
-               NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
-
-       SAFE_FREE(sids);
-       SAFE_FREE(member_string);
-
-       return result;
-}
-
-/*
- *
- * 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)
-{
-       struct group *grp;
-       BOOL ret;
-       
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               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 */
-       
-       become_root();
-       ret = pdb_getgrsid(map, sid);
-       unbecome_root();
-       
-       if ( !ret ) 
-               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) {
-               return False;
-       }
-
-       DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
-       
-       if (map->gid==-1) {
-               return False;
-       }
-
-       DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
-       
-       grp = getgrgid(map->gid);
-       if ( !grp ) {
-               DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
-               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 ret;
-       
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       /* The group is in the mapping table */
-       become_root();
-       ret = pdb_getgrsid(map, *sid);
-       unbecome_root();
-       
-       if ( !ret )
-               return False;
-               
-       if ( ( (map->sid_name_use != SID_NAME_ALIAS) &&
-              (map->sid_name_use != SID_NAME_WKN_GRP) )
-               || (map->gid == -1)
-               || (getgrgid(map->gid) == NULL) ) 
-       {
-               return False;
-       }               
-                       
-#if 1  /* JERRY */
-       /* local groups only exist in the group mapping DB so this 
-          is not necessary */
-          
-       else {
-               /* the group isn't in the mapping table.
-                * make one based on the unix information */
-               uint32 alias_rid;
-               struct group *grp;
-
-               sid_peek_rid(sid, &alias_rid);
-               map->gid=pdb_group_rid_to_gid(alias_rid);
-               
-               grp = getgrgid(map->gid);
-               if ( !grp ) {
-                       DEBUG(3,("get_local_group_from_sid: No unix group for [%ul]\n", map->gid));
-                       return False;
-               }
-
-               map->sid_name_use=SID_NAME_ALIAS;
-
-               fstrcpy(map->nt_name, grp->gr_name);
-               fstrcpy(map->comment, "Local Unix Group");
-
-               sid_copy(&map->sid, sid);
-       }
-#endif
-
-       return True;
-}
-
-/* get a builtin group from it's SID */
-
-BOOL get_builtin_group_from_sid(DOM_SID *sid, GROUP_MAP *map)
-{
-       struct group *grp;
-       BOOL ret;
-       
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
-
-       become_root();
-       ret = pdb_getgrsid(map, *sid);
-       unbecome_root();
-       
-       if ( !ret )
-               return False;
-
-       if (map->sid_name_use!=SID_NAME_WKN_GRP) {
-               return False;
-       }
-
-       if (map->gid==-1) {
-               return False;
-       }
-
-       if ( (grp=getgrgid(map->gid)) == NULL) {
-               return False;
-       }
-
-       return True;
-}
-
-
-
-/****************************************************************************
-Returns a GROUP_MAP struct based on the gid.
-****************************************************************************/
-BOOL get_group_from_gid(gid_t gid, GROUP_MAP *map)
-{
-       struct group *grp;
-       BOOL ret;
-
-       if(!init_group_mapping()) {
-               DEBUG(0,("failed to initialize group mapping\n"));
-               return(False);
-       }
+}
 
-       if ( (grp=getgrgid(gid)) == NULL)
-               return False;
+static NTSTATUS alias_memberships(const struct dom_sid *members, size_t num_members,
+                                 struct dom_sid **sids, size_t *num)
+{
+       size_t i;
 
-       become_root();
-       ret = pdb_getgrgid(map, gid);
-       unbecome_root();
-       
-       if ( !ret ) {
-               return False;
+       *num = 0;
+       *sids = NULL;
+
+       for (i=0; i<num_members; i++) {
+               NTSTATUS status = backend->one_alias_membership(&members[i], sids, num);
+               if (!NT_STATUS_IS_OK(status))
+                       return status;
        }
-       
-       return True;
+       return NT_STATUS_OK;
 }
 
+struct aliasmem_closure {
+       const struct dom_sid *alias;
+       struct dom_sid **sids;
+       size_t *num;
+};
 
 
 
-/****************************************************************************
- Get the member users of a group and
- all the users who have that group as primary.
-            
- give back an array of SIDS
- return the grand number of users
-
+/*
+ *
+ * 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
+ *
+ */
 
- TODO: sort the list and remove duplicate. JFM.
+/* get a domain group from it's SID */
 
-****************************************************************************/
-        
-BOOL get_sid_list_of_group(gid_t gid, DOM_SID **sids, int *num_sids)
+bool get_domain_group_from_sid(struct dom_sid sid, GROUP_MAP *map)
 {
        struct group *grp;
-       int i=0;
-       char *gr;
-       DOM_SID *s;
+       bool ret;
 
-       struct sys_pwent *userlist;
-       struct sys_pwent *user;
        if(!init_group_mapping()) {
                DEBUG(0,("failed to initialize group mapping\n"));
                return(False);
        }
 
-       *num_sids = 0;
-       *sids=NULL;
-       
-       if ( (grp=getgrgid(gid)) == NULL)
-               return False;
+       DEBUG(10, ("get_domain_group_from_sid\n"));
 
-       gr = grp->gr_mem[0];
-       DEBUG(10, ("getting members\n"));
-        
-       while (gr && (*gr != (char)'\0')) {
-               SAM_ACCOUNT *group_member_acct = NULL;
-               BOOL found_user;
-               s = Realloc((*sids), sizeof(**sids)*(*num_sids+1));
-               if (!s) {
-                       DEBUG(0,("get_uid_list_of_group: unable to enlarge SID list!\n"));
-                       return False;
-               }
-               else (*sids) = s;
+       /* if the group is NOT in the database, it CAN NOT be a domain group */
 
-               if (!NT_STATUS_IS_OK(pdb_init_sam(&group_member_acct))) {
-                       continue;
-               }
+       become_root();
+       ret = pdb_getgrsid(map, sid);
+       unbecome_root();
 
-               become_root();
-               found_user = pdb_getsampwnam(group_member_acct, gr);
-               unbecome_root();
-       
-               if (found_user) {
-                       sid_copy(&(*sids)[*num_sids], pdb_get_user_sid(group_member_acct));
-                       (*num_sids)++;
-               }
-       
-               pdb_free_sam(&group_member_acct);
+       /* special case check for rid 513 */
 
-               gr = grp->gr_mem[++i];
-       }
-       DEBUG(10, ("got [%d] members\n", *num_sids));
+       if ( !ret ) {
+               uint32 rid;
 
-       winbind_off();
+               sid_peek_rid( &sid, &rid );
 
-       user = userlist = getpwent_list();
+               if ( rid == DOMAIN_RID_USERS ) {
+                       fstrcpy( map->nt_name, "None" );
+                       fstrcpy( map->comment, "Ordinary Users" );
+                       sid_copy( &map->sid, &sid );
+                       map->sid_name_use = SID_NAME_DOM_GRP;
+                       map->gid = (gid_t)-1;
+                       return True;
+               }
+               return False;
+       }
 
-       while (user != NULL) {
+       DEBUG(10, ("get_domain_group_from_sid: SID found in passdb\n"));
 
-               SAM_ACCOUNT *group_member_acct = NULL;
-               BOOL found_user;
+       /* if it's not a domain group, continue */
+       if (map->sid_name_use!=SID_NAME_DOM_GRP) {
+               return False;
+       }
 
-               if (user->pw_gid != gid) {
-                       user = user->next;
-                       continue;
-               }
+       DEBUG(10, ("get_domain_group_from_sid: SID is a domain group\n"));
 
-               s = Realloc((*sids), sizeof(**sids)*(*num_sids+1));
-               if (!s) {
-                       DEBUG(0,("get_sid_list_of_group: unable to enlarge "
-                                "SID list!\n"));
-                       pwent_free(userlist);
-                       winbind_on();
-                       return False;
-               }
-               else (*sids) = s;
-                       
-               if (!NT_STATUS_IS_OK(pdb_init_sam(&group_member_acct))) {
-                       continue;
-               }
-                       
-               become_root();
-               found_user = pdb_getsampwnam(group_member_acct, user->pw_name);
-               unbecome_root();
-                       
-               if (found_user) {
-                       sid_copy(&(*sids)[*num_sids],
-                                pdb_get_user_sid(group_member_acct));
-                       (*num_sids)++;
-               } else {
-                       DEBUG(4,("get_sid_list_of_group: User %s [uid == %lu] "
-                                "has no samba account\n",
-                                user->pw_name, (unsigned long)user->pw_uid));
-                       if (algorithmic_uid_to_sid(&(*sids)[*num_sids],
-                                                  user->pw_uid))
-                               (*num_sids)++;
-               }
-               pdb_free_sam(&group_member_acct);
+       if (map->gid==-1) {
+               return False;
+       }
+
+       DEBUG(10, ("get_domain_group_from_sid: SID is mapped to gid:%lu\n",(unsigned long)map->gid));
 
-               user = user->next;
+       grp = getgrgid(map->gid);
+       if ( !grp ) {
+               DEBUG(10, ("get_domain_group_from_sid: gid DOESN'T exist in UNIX security\n"));
+               return False;
        }
-       pwent_free(userlist);
-       DEBUG(10, ("got primary groups, members: [%d]\n", *num_sids));
 
-       winbind_on();
-        return True;
+       DEBUG(10, ("get_domain_group_from_sid: gid exists in UNIX security\n"));
+
+       return True;
 }
 
 /****************************************************************************
  Create a UNIX group on demand.
 ****************************************************************************/
 
-int smb_create_group(char *unix_group, gid_t *new_gid)
+int smb_create_group(const char *unix_group, gid_t *new_gid)
 {
-       pstring add_script;
+       char *add_script = NULL;
        int     ret = -1;
        int     fd = 0;
-       
+
        *new_gid = 0;
 
        /* defer to scripts */
-       
+
        if ( *lp_addgroup_script() ) {
-               pstrcpy(add_script, lp_addgroup_script());
-               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));
+               TALLOC_CTX *ctx = talloc_tos();
+
+               add_script = talloc_strdup(ctx,
+                                       lp_addgroup_script());
+               if (!add_script) {
+                       return -1;
+               }
+               add_script = talloc_string_sub(ctx,
+                               add_script, "%g", unix_group);
+               if (!add_script) {
+                       return -1;
+               }
+
+               ret = smbrun(add_script, &fd);
+               DEBUG(ret ? 0 : 3,("smb_create_group: Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                if (ret != 0)
                        return ret;
-                       
+
                if (fd != 0) {
                        fstring output;
 
@@ -1108,83 +211,96 @@ int smb_create_group(char *unix_group, gid_t *new_gid)
                        if (read(fd, output, sizeof(output)) > 0) {
                                *new_gid = (gid_t)strtoul(output, NULL, 10);
                        }
-                       
+
                        close(fd);
                }
 
-       } else if ( winbind_create_group( unix_group, NULL ) ) {
-
-               DEBUG(3,("smb_create_group: winbindd created the group (%s)\n",
-                       unix_group));
-               ret = 0;
        }
-       
+
        if (*new_gid == 0) {
                struct group *grp = getgrnam(unix_group);
 
                if (grp != NULL)
                        *new_gid = grp->gr_gid;
        }
-                       
-       return ret;     
+
+       return ret;
 }
 
 /****************************************************************************
  Delete a UNIX group on demand.
 ****************************************************************************/
 
-int smb_delete_group(char *unix_group)
+int smb_delete_group(const char *unix_group)
 {
-       pstring del_script;
-       int ret;
+       char *del_script = NULL;
+       int ret = -1;
 
        /* defer to scripts */
-       
+
        if ( *lp_delgroup_script() ) {
-               pstrcpy(del_script, lp_delgroup_script());
-               pstring_sub(del_script, "%g", unix_group);
+               TALLOC_CTX *ctx = talloc_tos();
+
+               del_script = talloc_strdup(ctx,
+                               lp_delgroup_script());
+               if (!del_script) {
+                       return -1;
+               }
+               del_script = talloc_string_sub(ctx,
+                               del_script, "%g", unix_group);
+               if (!del_script) {
+                       return -1;
+               }
                ret = smbrun(del_script,NULL);
-               DEBUG(3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
+               DEBUG(ret ? 0 : 3,("smb_delete_group: Running the command `%s' gave %d\n",del_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
 
-       if ( winbind_delete_group( unix_group ) ) {
-               DEBUG(3,("smb_delete_group: winbindd deleted the group (%s)\n",
-                       unix_group));
-               return 0;
-       }
-               
        return -1;
 }
 
 /****************************************************************************
  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;
+       char *add_script = NULL;
+       int ret = -1;
 
        /* defer to scripts */
-       
+
        if ( *lp_setprimarygroup_script() ) {
-               pstrcpy(add_script, lp_setprimarygroup_script());
-               all_string_sub(add_script, "%g", unix_group, sizeof(add_script));
-               all_string_sub(add_script, "%u", unix_user, sizeof(add_script));
+               TALLOC_CTX *ctx = talloc_tos();
+
+               add_script = talloc_strdup(ctx,
+                               lp_setprimarygroup_script());
+               if (!add_script) {
+                       return -1;
+               }
+               add_script = talloc_all_string_sub(ctx,
+                               add_script, "%g", unix_group);
+               if (!add_script) {
+                       return -1;
+               }
+               add_script = talloc_string_sub(ctx,
+                               add_script, "%u", unix_user);
+               if (!add_script) {
+                       return -1;
+               }
                ret = smbrun(add_script,NULL);
-               DEBUG(3,("smb_set_primary_group: "
+               flush_pwnam_cache();
+               DEBUG(ret ? 0 : 3,("smb_set_primary_group: "
                         "Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
 
-       /* Try winbindd */
-       
-       if ( winbind_set_user_primary_group( unix_user, unix_group ) ) {
-               DEBUG(3,("smb_delete_group: winbindd set the group (%s) as the primary group for user (%s)\n",
-                       unix_group, unix_user));
-               return 0;
-       }               
-       
        return -1;
 }
 
@@ -1192,30 +308,39 @@ int smb_set_primary_group(const char *unix_group, const char* unix_user)
  Add a user to a UNIX group.
 ****************************************************************************/
 
-int smb_add_user_group(char *unix_group, char *unix_user)
+int smb_add_user_group(const char *unix_group, const char *unix_user)
 {
-       pstring add_script;
-       int ret;
+       char *add_script = NULL;
+       int ret = -1;
 
        /* defer to scripts */
-       
+
        if ( *lp_addusertogroup_script() ) {
-               pstrcpy(add_script, lp_addusertogroup_script());
-               pstring_sub(add_script, "%g", unix_group);
-               pstring_sub(add_script, "%u", unix_user);
+               TALLOC_CTX *ctx = talloc_tos();
+
+               add_script = talloc_strdup(ctx,
+                               lp_addusertogroup_script());
+               if (!add_script) {
+                       return -1;
+               }
+               add_script = talloc_string_sub(ctx,
+                               add_script, "%g", unix_group);
+               if (!add_script) {
+                       return -1;
+               }
+               add_script = talloc_string_sub2(ctx,
+                               add_script, "%u", unix_user, true, false, true);
+               if (!add_script) {
+                       return -1;
+               }
                ret = smbrun(add_script,NULL);
-               DEBUG(3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
+               DEBUG(ret ? 0 : 3,("smb_add_user_group: Running the command `%s' gave %d\n",add_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
-       
-       /* Try winbindd */
-
-       if ( winbind_add_user_to_group( unix_user, unix_group ) ) {
-               DEBUG(3,("smb_delete_group: winbindd added user (%s) to the group (%s)\n",
-                       unix_user, unix_group));
-               return -1;
-       }       
-       
+
        return -1;
 }
 
@@ -1225,134 +350,175 @@ int smb_add_user_group(char *unix_group, char *unix_user)
 
 int smb_delete_user_group(const char *unix_group, const char *unix_user)
 {
-       pstring del_script;
-       int ret;
+       char *del_script = NULL;
+       int ret = -1;
 
        /* defer to scripts */
-       
+
        if ( *lp_deluserfromgroup_script() ) {
-               pstrcpy(del_script, lp_deluserfromgroup_script());
-               pstring_sub(del_script, "%g", unix_group);
-               pstring_sub(del_script, "%u", unix_user);
+               TALLOC_CTX *ctx = talloc_tos();
+
+               del_script = talloc_strdup(ctx,
+                               lp_deluserfromgroup_script());
+               if (!del_script) {
+                       return -1;
+               }
+               del_script = talloc_string_sub(ctx,
+                               del_script, "%g", unix_group);
+               if (!del_script) {
+                       return -1;
+               }
+               del_script = talloc_string_sub2(ctx,
+                               del_script, "%u", unix_user, true, false, true);
+               if (!del_script) {
+                       return -1;
+               }
                ret = smbrun(del_script,NULL);
-               DEBUG(3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
+               DEBUG(ret ? 0 : 3,("smb_delete_user_group: Running the command `%s' gave %d\n",del_script,ret));
+               if (ret == 0) {
+                       smb_nscd_flush_group_cache();
+               }
                return ret;
        }
-       
-       /* Try winbindd */
 
-       if ( winbind_remove_user_from_group( unix_user, unix_group ) ) {
-               DEBUG(3,("smb_delete_group: winbindd removed user (%s) from the group (%s)\n",
-                       unix_user, unix_group));
-               return 0;
-       }
-       
        return -1;
 }
 
 
 NTSTATUS pdb_default_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
-                                DOM_SID sid)
+                                struct dom_sid sid)
 {
-       return get_group_map_from_sid(sid, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_sid(sid, map) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_getgrgid(struct pdb_methods *methods, GROUP_MAP *map,
                                 gid_t gid)
 {
-       return get_group_map_from_gid(gid, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_gid(gid, map) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_default_getgrnam(struct pdb_methods *methods, GROUP_MAP *map,
                                 const char *name)
 {
-       return get_group_map_from_ntname(name, map) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->get_group_map_from_ntname(name, map) ?
                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) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->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) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->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)
+                                                  struct dom_sid sid)
 {
-       return group_map_remove(sid) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->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)
+                                          const struct dom_sid *sid, enum lsa_SidType sid_name_use,
+                                          GROUP_MAP **pp_rmap, size_t *p_num_entries,
+                                          bool unix_only)
 {
-       return enum_group_mapping(sid_name_use, rmap, num_entries, unix_only) ?
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->enum_group_mapping(sid, sid_name_use, pp_rmap, p_num_entries, unix_only) ?
                NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
 }
 
-NTSTATUS pdb_default_find_alias(struct pdb_methods *methods,
-                               const char *name, DOM_SID *sid)
-{
-       GROUP_MAP map;
-
-       if (!pdb_getgrnam(&map, name))
-               return NT_STATUS_NO_SUCH_ALIAS;
-
-       if ((map.sid_name_use != SID_NAME_WKN_GRP) &&
-           (map.sid_name_use != SID_NAME_ALIAS))
-               return NT_STATUS_OBJECT_TYPE_MISMATCH;
-
-       sid_copy(sid, &map.sid);
-       return NT_STATUS_OK;
-}
-
 NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
                                  const char *name, uint32 *rid)
 {
-       DOM_SID sid;
-       enum SID_NAME_USE type;
+       struct dom_sid sid;
+       enum lsa_SidType type;
        uint32 new_rid;
        gid_t gid;
-
+       bool exists;
        GROUP_MAP map;
+       TALLOC_CTX *mem_ctx;
+       NTSTATUS status;
 
-       if (lookup_name(get_global_sam_name(), name, &sid, &type))
+       DEBUG(10, ("Trying to create alias %s\n", name));
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               return NT_STATUS_NO_MEMORY;
+       }
+
+       exists = lookup_name(mem_ctx, name, LOOKUP_NAME_LOCAL,
+                            NULL, NULL, &sid, &type);
+       TALLOC_FREE(mem_ctx);
+
+       if (exists) {
                return NT_STATUS_ALIAS_EXISTS;
+       }
 
-       if (!winbind_allocate_rid(&new_rid))
+       if (!pdb_new_rid(&new_rid)) {
+               DEBUG(0, ("Could not allocate a RID.\n"));
                return NT_STATUS_ACCESS_DENIED;
+       }
 
-       sid_copy(&sid, get_global_sam_sid());
-       sid_append_rid(&sid, new_rid);
+       sid_compose(&sid, get_global_sam_sid(), new_rid);
 
-       /* Here we allocate the gid */
-       if (!winbind_sid_to_gid(&gid, &sid)) {
-               DEBUG(0, ("Could not get gid for new RID\n"));
+       if (!winbind_allocate_gid(&gid)) {
+               DEBUG(3, ("Could not get a gid out of winbind - "
+                         "wasted a rid :-(\n"));
                return NT_STATUS_ACCESS_DENIED;
        }
 
+       DEBUG(10, ("Creating alias %s with gid %u and rid %u\n",
+                  name, (unsigned int)gid, (unsigned int)new_rid));
+
        map.gid = gid;
        sid_copy(&map.sid, &sid);
        map.sid_name_use = SID_NAME_ALIAS;
        fstrcpy(map.nt_name, name);
        fstrcpy(map.comment, "");
 
-       if (!pdb_add_group_mapping_entry(&map)) {
-               DEBUG(0, ("Could not add group mapping entry for alias %s\n",
-                         name));
-               return NT_STATUS_ACCESS_DENIED;
+       status = pdb_add_group_mapping_entry(&map);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0, ("Could not add group mapping entry for alias %s "
+                         "(%s)\n", name, nt_errstr(status)));
+               return status;
        }
 
        *rid = new_rid;
@@ -1361,63 +527,13 @@ NTSTATUS pdb_default_create_alias(struct pdb_methods *methods,
 }
 
 NTSTATUS pdb_default_delete_alias(struct pdb_methods *methods,
-                                 const DOM_SID *sid)
-{
-       return pdb_delete_group_mapping_entry(*sid) ?
-               NT_STATUS_OK : NT_STATUS_ACCESS_DENIED;
-}
-
-NTSTATUS pdb_default_enum_aliases(struct pdb_methods *methods,
-                                 const DOM_SID *sid,
-                                 uint32 start_idx, uint32 max_entries,
-                                 uint32 *num_aliases,
-                                 struct acct_info **info)
+                                 const struct dom_sid *sid)
 {
-       extern DOM_SID global_sid_Builtin;
-
-       GROUP_MAP *map;
-       int i, num_maps;
-       enum SID_NAME_USE type = SID_NAME_UNKNOWN;
-
-       if (sid_compare(sid, get_global_sam_sid()) == 0)
-               type = SID_NAME_ALIAS;
-
-       if (sid_compare(sid, &global_sid_Builtin) == 0)
-               type = SID_NAME_WKN_GRP;
-
-       if (!pdb_enum_group_mapping(type, &map, &num_maps, False) ||
-           (num_maps == 0)) {
-               *num_aliases = 0;
-               *info = NULL;
-               goto done;
-       }
-
-       if (start_idx > num_maps) {
-               *num_aliases = 0;
-               *info = NULL;
-               goto done;
-       }
-
-       *num_aliases = num_maps - start_idx;
-
-       if (*num_aliases > max_entries)
-               *num_aliases = max_entries;
-
-       *info = malloc(sizeof(struct acct_info) * (*num_aliases));
-
-       for (i=0; i<*num_aliases; i++) {
-               fstrcpy((*info)[i].acct_name, map[i+start_idx].nt_name);
-               fstrcpy((*info)[i].acct_desc, map[i+start_idx].comment);
-               sid_peek_rid(&map[i].sid, &(*info)[i+start_idx].rid);
-       }
-
- done:
-       SAFE_FREE(map);
-       return NT_STATUS_OK;
+       return pdb_delete_group_mapping_entry(*sid);
 }
 
 NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
-                                  const DOM_SID *sid,
+                                  const struct dom_sid *sid,
                                   struct acct_info *info)
 {
        GROUP_MAP map;
@@ -1425,6 +541,14 @@ NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
        if (!pdb_getgrsid(&map, *sid))
                return NT_STATUS_NO_SUCH_ALIAS;
 
+       if ((map.sid_name_use != SID_NAME_ALIAS) &&
+           (map.sid_name_use != SID_NAME_WKN_GRP)) {
+               DEBUG(2, ("%s is a %s, expected an alias\n",
+                         sid_string_dbg(sid),
+                         sid_type_lookup(map.sid_name_use)));
+               return NT_STATUS_NO_SUCH_ALIAS;
+       }
+
        fstrcpy(info->acct_name, map.nt_name);
        fstrcpy(info->acct_desc, map.comment);
        sid_peek_rid(&map.sid, &info->rid);
@@ -1432,7 +556,7 @@ NTSTATUS pdb_default_get_aliasinfo(struct pdb_methods *methods,
 }
 
 NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
-                                  const DOM_SID *sid,
+                                  const struct dom_sid *sid,
                                   struct acct_info *info)
 {
        GROUP_MAP map;
@@ -1440,38 +564,91 @@ NTSTATUS pdb_default_set_aliasinfo(struct pdb_methods *methods,
        if (!pdb_getgrsid(&map, *sid))
                return NT_STATUS_NO_SUCH_ALIAS;
 
+       fstrcpy(map.nt_name, info->acct_name);
        fstrcpy(map.comment, info->acct_desc);
 
-       if (!pdb_update_group_mapping_entry(&map))
-               return NT_STATUS_ACCESS_DENIED;
-
-       return NT_STATUS_OK;
+       return pdb_update_group_mapping_entry(&map);
 }
 
 NTSTATUS pdb_default_add_aliasmem(struct pdb_methods *methods,
-                                 const DOM_SID *alias, const DOM_SID *member)
+                                 const struct dom_sid *alias, const struct dom_sid *member)
 {
-       return add_aliasmem(alias, member);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->add_aliasmem(alias, member);
 }
 
 NTSTATUS pdb_default_del_aliasmem(struct pdb_methods *methods,
-                                 const DOM_SID *alias, const DOM_SID *member)
+                                 const struct dom_sid *alias, const struct dom_sid *member)
 {
-       return del_aliasmem(alias, member);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->del_aliasmem(alias, member);
 }
 
 NTSTATUS pdb_default_enum_aliasmem(struct pdb_methods *methods,
-                                  const DOM_SID *alias, DOM_SID **members,
-                                  int *num_members)
+                                  const struct dom_sid *alias, TALLOC_CTX *mem_ctx,
+                                  struct dom_sid **pp_members, size_t *p_num_members)
 {
-       return enum_aliasmem(alias, members, num_members);
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+       return backend->enum_aliasmem(alias, mem_ctx, pp_members,
+                                     p_num_members);
 }
 
 NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
-                                      const DOM_SID *sid,
-                                      DOM_SID **aliases, int *num)
-{
-       return alias_memberships(sid, aliases, num);
+                                      TALLOC_CTX *mem_ctx,
+                                      const struct dom_sid *domain_sid,
+                                      const struct dom_sid *members,
+                                      size_t num_members,
+                                      uint32 **pp_alias_rids,
+                                      size_t *p_num_alias_rids)
+{
+       struct dom_sid *alias_sids;
+       size_t i, num_alias_sids;
+       NTSTATUS result;
+
+       if (!init_group_mapping()) {
+               DEBUG(0,("failed to initialize group mapping\n"));
+               return NT_STATUS_UNSUCCESSFUL;
+       }
+
+       alias_sids = NULL;
+       num_alias_sids = 0;
+
+       result = alias_memberships(members, num_members,
+                                  &alias_sids, &num_alias_sids);
+
+       if (!NT_STATUS_IS_OK(result))
+               return result;
+
+       *p_num_alias_rids = 0;
+
+       if (num_alias_sids == 0) {
+               TALLOC_FREE(alias_sids);
+               return NT_STATUS_OK;
+       }
+
+       *pp_alias_rids = talloc_array(mem_ctx, uint32, num_alias_sids);
+       if (*pp_alias_rids == NULL)
+               return NT_STATUS_NO_MEMORY;
+
+       for (i=0; i<num_alias_sids; i++) {
+               if (!sid_peek_check_rid(domain_sid, &alias_sids[i],
+                                       &(*pp_alias_rids)[*p_num_alias_rids]))
+                       continue;
+               *p_num_alias_rids += 1;
+       }
+
+       TALLOC_FREE(alias_sids);
+
+       return NT_STATUS_OK;
 }
 
 /**********************************************************************
@@ -1479,7 +656,7 @@ NTSTATUS pdb_default_alias_memberships(struct pdb_methods *methods,
  *********************************************************************/
 
 NTSTATUS pdb_nop_getgrsid(struct pdb_methods *methods, GROUP_MAP *map,
-                                DOM_SID sid)
+                                struct dom_sid sid)
 {
        return NT_STATUS_UNSUCCESSFUL;
 }
@@ -1509,16 +686,109 @@ NTSTATUS pdb_nop_update_group_mapping_entry(struct pdb_methods *methods,
 }
 
 NTSTATUS pdb_nop_delete_group_mapping_entry(struct pdb_methods *methods,
-                                                  DOM_SID sid)
+                                                  struct dom_sid sid)
 {
        return NT_STATUS_UNSUCCESSFUL;
 }
 
 NTSTATUS pdb_nop_enum_group_mapping(struct pdb_methods *methods,
-                                          enum SID_NAME_USE sid_name_use,
-                                          GROUP_MAP **rmap, int *num_entries,
-                                          BOOL unix_only)
+                                          enum lsa_SidType sid_name_use,
+                                          GROUP_MAP **rmap, size_t *num_entries,
+                                          bool unix_only)
 {
        return NT_STATUS_UNSUCCESSFUL;
 }
 
+/****************************************************************************
+ These need to be redirected through pdb_interface.c
+****************************************************************************/
+bool pdb_get_dom_grp_info(const struct dom_sid *sid, struct acct_info *info)
+{
+       GROUP_MAP map;
+       bool res;
+
+       become_root();
+       res = get_domain_group_from_sid(*sid, &map);
+       unbecome_root();
+
+       if (!res)
+               return False;
+
+       fstrcpy(info->acct_name, map.nt_name);
+       fstrcpy(info->acct_desc, map.comment);
+       sid_peek_rid(sid, &info->rid);
+       return True;
+}
+
+bool pdb_set_dom_grp_info(const struct dom_sid *sid, const struct acct_info *info)
+{
+       GROUP_MAP map;
+
+       if (!get_domain_group_from_sid(*sid, &map))
+               return False;
+
+       fstrcpy(map.nt_name, info->acct_name);
+       fstrcpy(map.comment, info->acct_desc);
+
+       return NT_STATUS_IS_OK(pdb_update_group_mapping_entry(&map));
+}
+
+/********************************************************************
+ Really just intended to be called by smbd
+********************************************************************/
+
+NTSTATUS pdb_create_builtin_alias(uint32 rid)
+{
+       struct dom_sid sid;
+       enum lsa_SidType type;
+       gid_t gid;
+       GROUP_MAP map;
+       TALLOC_CTX *mem_ctx;
+       NTSTATUS status;
+       const char *name = NULL;
+       fstring groupname;
+
+       DEBUG(10, ("Trying to create builtin alias %d\n", rid));
+
+       if ( !sid_compose( &sid, &global_sid_Builtin, rid ) ) {
+               return NT_STATUS_NO_SUCH_ALIAS;
+       }
+
+       if ( (mem_ctx = talloc_new(NULL)) == NULL ) {
+               return NT_STATUS_NO_MEMORY;
+       }
+
+       if ( !lookup_sid(mem_ctx, &sid, NULL, &name, &type) ) {
+               TALLOC_FREE( mem_ctx );
+               return NT_STATUS_NO_SUCH_ALIAS;
+       }
+
+       /* validate RID so copy the name and move on */
+
+       fstrcpy( groupname, name );
+       TALLOC_FREE( mem_ctx );
+
+       if (!winbind_allocate_gid(&gid)) {
+               DEBUG(3, ("pdb_create_builtin_alias: Could not get a gid out of winbind\n"));
+               return NT_STATUS_ACCESS_DENIED;
+       }
+
+       DEBUG(10,("Creating alias %s with gid %u\n", groupname, (unsigned int)gid));
+
+       map.gid = gid;
+       sid_copy(&map.sid, &sid);
+       map.sid_name_use = SID_NAME_ALIAS;
+       strlcpy(map.nt_name, groupname, sizeof(map.nt_name));
+       strlcpy(map.comment, "", sizeof(map.comment));
+
+       status = pdb_add_group_mapping_entry(&map);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               DEBUG(0, ("pdb_create_builtin_alias: Could not add group mapping entry for alias %d "
+                         "(%s)\n", rid, nt_errstr(status)));
+       }
+
+       return status;
+}
+
+