r9557: Some more updates. Use combined function for parsing a set of
[samba.git] / source / lib / samba3 / group.c
index d7097f596a499d516fa2ce46c10d89fe38f207c3..fc8f8c40b87e1aecab568deeea06e47c7599ed68 100644 (file)
@@ -24,6 +24,7 @@
 #include "lib/samba3/samba3.h"
 #include "lib/tdb/include/tdbutil.h"
 #include "system/filesys.h"
+#include "pstring.h"
 
 #define DATABASE_VERSION_V1 1 /* native byte format. */
 #define DATABASE_VERSION_V2 2 /* le format. */
  */
 #define MEMBEROF_PREFIX "MEMBEROF/"
 
-#define ENUM_ONLY_MAPPED True
-#define ENUM_ALL_MAPPED False
-
-
-/****************************************************************************
-dump the mapping group mapping to a text file
-****************************************************************************/
-static const char *decode_sid_name_use(enum SID_NAME_USE name_use)
-{      
-       switch(name_use) {
-               case SID_NAME_USER:
-                       return "User";
-               case SID_NAME_DOM_GRP:
-                       return "Domain group";
-               case SID_NAME_DOMAIN:
-                       return "Domain";
-               case SID_NAME_ALIAS:
-                       return "Local group";
-               case SID_NAME_WKN_GRP:
-                       return "Builtin group";
-               case SID_NAME_DELETED:
-                       return "Deleted";
-               case SID_NAME_INVALID:
-                       return "Invalid";
-               case SID_NAME_UNKNOWN:
-               default:
-                       return "Unknown type";
-       }
-}
-
 /****************************************************************************
  Open the group mapping tdb.
 ****************************************************************************/
-static TDB_CONTEXT *tdbgroup_open(const char *file)
+NTSTATUS samba3_read_grouptdb(const char *file, TALLOC_CTX *ctx, struct samba3_groupdb *db)
 {
        int32_t vers_id;
+       TDB_DATA kbuf, dbuf, newkey;
+       int ret;
        
        TDB_CONTEXT *tdb = tdb_open(file, 0, TDB_DEFAULT, O_RDONLY, 0600);
        if (!tdb) {
                DEBUG(0,("Failed to open group mapping database\n"));
-               return NULL;
+               return NT_STATUS_UNSUCCESSFUL;
        }
 
        /* Cope with byte-reversed older versions of the db. */
@@ -88,396 +61,77 @@ static TDB_CONTEXT *tdbgroup_open(const char *file)
        }
 
        if (vers_id != DATABASE_VERSION_V2) {
-               return NULL;
-       }
-
-       return tdb;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_sid(TDB_CONTEXT *tdb, struct dom_sid sid, struct samba3_groupmapping *map)
-{
-       TDB_DATA kbuf, dbuf;
-       const char *key;
-       int ret = 0;
-       
-       /* the key is the SID, retrieving is direct */
-
-       kbuf.dptr = talloc_asprintf(tdb, "%s%s", GROUP_PREFIX, dom_sid_string(tdb, &sid));
-       kbuf.dsize = strlen(key)+1;
-               
-       dbuf = tdb_fetch(tdb, kbuf);
-       if (!dbuf.dptr)
-               return False;
-
-       ret = tdb_unpack(tdb, 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;
+               return NT_STATUS_UNSUCCESSFUL;
        }
 
-       map->sid = dom_sid_dup(tdb, &sid);
-       
-       return True;
-}
-
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
-
-static BOOL get_group_map_from_gid(TDB_CONTEXT *tdb, gid_t gid, struct samba3_groupmapping *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       int ret;
-
-       /* we need to enumerate the TDB to find the GID */
+       db->groupmappings = NULL;
+       db->groupmap_count = 0;
+       db->aliases = NULL;
+       db->alias_count = 0;
 
        for (kbuf = tdb_firstkey(tdb); 
             kbuf.dptr; 
             newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+               struct samba3_groupmapping map;
 
-               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
-               
-               dbuf = tdb_fetch(tdb, kbuf);
-               if (!dbuf.dptr)
-                       continue;
+               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) == 0)
+               {
+                       dbuf = tdb_fetch(tdb, kbuf);
+                       if (!dbuf.dptr)
+                               continue;
 
+                       map.sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
 
-               map->sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
-               
-               ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
+                       ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
+                                                        &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
 
-               SAFE_FREE(dbuf.dptr);
+                       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;
-               }
-       }
+                       if ( ret == -1 ) {
+                               DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
+                               continue;
+                       }
 
-       return False;
-}
+                       db->groupmappings = talloc_realloc(tdb, db->groupmappings, struct samba3_groupmapping, db->groupmap_count+1);
 
-/****************************************************************************
- Return the sid and the type of the unix group.
-****************************************************************************/
+                       if (!db->groupmappings) 
+                               return NT_STATUS_NO_MEMORY;
 
-static BOOL get_group_map_from_ntname(TDB_CONTEXT *tdb, const char *name, struct samba3_groupmapping *map)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       int ret;
-
-       /* we need to enumerate the TDB to find the name */
+                       db->groupmappings[db->groupmap_count] = map;
 
-       for (kbuf = tdb_firstkey(tdb); 
-            kbuf.dptr; 
-            newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
+                       db->groupmap_count++;
+               } 
 
-               if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) != 0) continue;
-               
-               dbuf = tdb_fetch(tdb, kbuf);
-               if (!dbuf.dptr)
-                       continue;
+               if (strncmp(kbuf.dptr, MEMBEROF_PREFIX, strlen(MEMBEROF_PREFIX)) == 0)
+               {
+                       struct samba3_alias alias;
+                       pstring alias_string;
+                       const char *p;
 
-               map->sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
-               
-               ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
-                                &map->gid, &map->sid_name_use, &map->nt_name, &map->comment);
+                       dbuf = tdb_fetch(tdb, kbuf);
+                       if (!dbuf.dptr)
+                               continue;
 
-               SAFE_FREE(dbuf.dptr);
-               
-               if ( ret == -1 ) {
-                       DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
-                       return False;
-               }
+                       alias.sid = dom_sid_parse_talloc(ctx, kbuf.dptr+strlen(MEMBEROF_PREFIX));
+                       alias.member_count = 0;
+                       alias.members = NULL;
 
-               if (StrCaseCmp(name, map->nt_name)==0) {
-                       SAFE_FREE(kbuf.dptr);
-                       return True;
-               }
-       }
+                       p = dbuf.dptr;
+                       while (next_token(&p, alias_string, " ", sizeof(alias_string))) {
 
-       return False;
-}
+                               alias.members = talloc_realloc(ctx, alias.members, struct dom_sid *, alias.member_count+1);
+                               alias.members[alias.member_count] = dom_sid_parse_talloc(ctx, alias_string);
+                               alias.member_count++;
 
-/****************************************************************************
- Enumerate the group mapping.
-****************************************************************************/
+                       }
 
-static BOOL enum_group_mapping(TDB_CONTEXT *tdb, enum SID_NAME_USE sid_name_use, struct samba3_groupmapping **rmap,
-                       int *num_entries, BOOL unix_only)
-{
-       TDB_DATA kbuf, dbuf, newkey;
-       struct samba3_groupmapping map;
-       struct samba3_groupmapping *mapt;
-       int ret;
-       int entries=0;
-
-       *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;
-
-               map.sid = dom_sid_parse_talloc(tdb, kbuf.dptr+strlen(GROUP_PREFIX));
-                               
-               ret = tdb_unpack(tdb, 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;
+                       db->aliases = talloc_realloc(ctx, db->aliases, struct samba3_alias, db->alias_count+1);
+                       db->aliases[db->alias_count] = alias;
+                       db->alias_count++;
                }
-
-               if (unix_only==ENUM_ONLY_MAPPED && map.gid==-1) {
-                       DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map.nt_name));
-                       continue;
-               }
-
-               DEBUG(11,("enum_group_mapping: returning group %s of type %s\n", map.nt_name ,decode_sid_name_use(map.sid_name_use)));
-
-               mapt = talloc_realloc(tdb, *rmap, struct samba3_groupmapping, entries+1);
-               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;
-               mapt[entries].sid = dom_sid_dup(tdb, map.sid);
-               mapt[entries].sid_name_use = map.sid_name_use;
-               mapt[entries].nt_name = map.nt_name;
-               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 one_alias_membership(TDB_CONTEXT *tdb, 
-               const struct dom_sid *member, struct dom_sid **sids, int *num)
-{
-       TDB_DATA kbuf, dbuf;
-       const char *p;
-
-       char * key = talloc_asprintf(tdb, "%s%s", MEMBEROF_PREFIX, dom_sid_string(tdb, member));
-
-       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))) {
-
-               struct dom_sid alias;
-
-               if (!string_to_sid(&alias, string_sid))
-                       continue;
-
-               add_sid_to_array_unique(NULL, &alias, sids, num);
-
-               if (sids == NULL)
-                       return NT_STATUS_NO_MEMORY;
-       }
-
-       SAFE_FREE(dbuf.dptr);
-       return NT_STATUS_OK;
-}
-
-static NTSTATUS alias_memberships(TDB_CONTEXT *tdb, const struct dom_sid *members, int num_members,
-                                 struct dom_sid **sids, int *num)
-{
-       int i;
-
-       *num = 0;
-       *sids = NULL;
-
-       for (i=0; i<num_members; i++) {
-               NTSTATUS status = one_alias_membership(tdb, &members[i], sids, num);
-               if (!NT_STATUS_IS_OK(status))
-                       return status;
-       }
-       return NT_STATUS_OK;
-}
-
-struct aliasmem_closure {
-       const struct dom_sid *alias;
-       struct 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))) {
-
-               struct 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(NULL, &member, closure->sids, closure->num);
        }
 
-       return 0;
-}
-
-static NTSTATUS enum_aliasmem(TDB_CONTEXT *tdb, const struct dom_sid *alias, struct dom_sid **sids, int *num)
-{
-       struct samba3_groupmapping map;
-       struct aliasmem_closure closure;
-
-       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;
+       tdb_close(tdb);
 
-       closure.alias = alias;
-       closure.sids = sids;
-       closure.num = num;
-
-       tdb_traverse(tdb, collect_aliasmem, &closure);
        return NT_STATUS_OK;
 }
-
-/*
- *
- * 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 */
-
-/* get a local (alias) group from it's SID */
-
-static BOOL get_local_group_from_sid(TDB_CONTEXT *tdb, struct dom_sid *sid, struct samba3_groupmapping *map)
-{
-       BOOL ret;
-       
-       /* The group is in the mapping table */
-       ret = pdb_getgrsid(map, *sid);
-       
-       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_t 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;
-}