source4/lib/samba3/group.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Andrew Tridgell              1992-2000,
   5  *  Copyright (C) Jean François Micouleau      1998-2001.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include "includes.h"
  23 #include "system/iconv.h"
  24 #include "lib/samba3/samba3.h"
  25 #include "lib/tdb/include/tdbutil.h"
  26 #include "system/filesys.h"
  27 #include "pstring.h"
  28
  29 #define DATABASE_VERSION_V1 1 /* native byte format. */
  30 #define DATABASE_VERSION_V2 2 /* le format. */
  31
  32 #define GROUP_PREFIX "UNIXGROUP/"
  33
  34 /* Alias memberships are stored reverse, as memberships. The performance
  35  * critical operation is to determine the aliases a SID is member of, not
  36  * listing alias members. So we store a list of alias SIDs a SID is member of
  37  * hanging of the member as key.
  38  */
  39 #define MEMBEROF_PREFIX "MEMBEROF/"
  40
  41 /****************************************************************************
  42  Open the group mapping tdb.
  43 ****************************************************************************/
  44 NTSTATUS samba3_read_grouptdb(const char *file, TALLOC_CTX *ctx, struct samba3_groupdb *db)
  45 {
  46         int32_t vers_id;
  47         TDB_DATA kbuf, dbuf, newkey;
  48         int ret;
  49         TDB_CONTEXT *tdb;
  50
  51         tdb = tdb_open(file, 0, TDB_DEFAULT, O_RDONLY, 0600);
  52         if (!tdb) {
  53                 DEBUG(0,("Failed to open group mapping database\n"));
  54                 return NT_STATUS_UNSUCCESSFUL;
  55         }
  56
  57         /* Cope with byte-reversed older versions of the db. */
  58         vers_id = tdb_fetch_int32(tdb, "INFO/version");
  59         if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) {
  60                 /* Written on a bigendian machine with old fetch_int code. Save as le. */
  61                 vers_id = DATABASE_VERSION_V2;
  62         }
  63
  64         if (vers_id != DATABASE_VERSION_V2) {
  65                 DEBUG(0, ("Group database version mismatch: %d\n", vers_id));
  66                 return NT_STATUS_UNSUCCESSFUL;
  67         }
  68
  69         db->groupmappings = NULL;
  70         db->groupmap_count = 0;
  71         db->aliases = NULL;
  72         db->alias_count = 0;
  73
  74         for (kbuf = tdb_firstkey(tdb);
  75              kbuf.dptr;
  76              newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
  77                 struct samba3_groupmapping map;
  78
  79                 if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) == 0)
  80                 {
  81                         dbuf = tdb_fetch(tdb, kbuf);
  82                         if (!dbuf.dptr)
  83                                 continue;
  84
  85                         map.sid = dom_sid_parse_talloc(ctx, kbuf.dptr+strlen(GROUP_PREFIX));
  86
  87                         ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "ddff",
  88                                                          &map.gid, &map.sid_name_use, &map.nt_name, &map.comment);
  89
  90                         if ( ret == -1 ) {
  91                                 DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
  92                                 continue;
  93                         }
  94
  95                         db->groupmappings = talloc_realloc(ctx, db->groupmappings, struct samba3_groupmapping, db->groupmap_count+1);
  96
  97                         if (!db->groupmappings)
  98                                 return NT_STATUS_NO_MEMORY;
  99
 100                         db->groupmappings[db->groupmap_count] = map;
 101
 102                         db->groupmap_count++;
 103                 }
 104
 105                 if (strncmp(kbuf.dptr, MEMBEROF_PREFIX, strlen(MEMBEROF_PREFIX)) == 0)
 106                 {
 107                         struct samba3_alias alias;
 108                         pstring alias_string;
 109                         const char *p;
 110
 111                         dbuf = tdb_fetch(tdb, kbuf);
 112                         if (!dbuf.dptr)
 113                                 continue;
 114
 115                         alias.sid = dom_sid_parse_talloc(ctx, kbuf.dptr+strlen(MEMBEROF_PREFIX));
 116                         alias.member_count = 0;
 117                         alias.members = NULL;
 118
 119                         p = dbuf.dptr;
 120                         while (next_token(&p, alias_string, " ", sizeof(alias_string))) {
 121
 122                                 alias.members = talloc_realloc(ctx, alias.members, struct dom_sid *, alias.member_count+1);
 123                                 alias.members[alias.member_count] = dom_sid_parse_talloc(ctx, alias_string);
 124                                 alias.member_count++;
 125
 126                         }
 127
 128                         db->aliases = talloc_realloc(ctx, db->aliases, struct samba3_alias, db->alias_count+1);
 129                         db->aliases[db->alias_count] = alias;
 130                         db->alias_count++;
 131                 }
 132         }
 133
 134         tdb_close(tdb);
 135
 136         return NT_STATUS_OK;
 137 }