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
  28 #define DATABASE_VERSION_V1 1 /* native byte format. */
  29 #define DATABASE_VERSION_V2 2 /* le format. */
  30
  31 #define GROUP_PREFIX "UNIXGROUP/"
  32
  33 /* Alias memberships are stored reverse, as memberships. The performance
  34  * critical operation is to determine the aliases a SID is member of, not
  35  * listing alias members. So we store a list of alias SIDs a SID is member of
  36  * hanging of the member as key.
  37  */
  38 #define MEMBEROF_PREFIX "MEMBEROF/"
  39
  40 /****************************************************************************
  41  Open the group mapping tdb.
  42 ****************************************************************************/
  43 NTSTATUS samba3_read_grouptdb(const char *file, TALLOC_CTX *ctx, struct samba3_groupdb *db)
  44 {
  45         int32_t vers_id;
  46         TDB_DATA kbuf, dbuf, newkey;
  47         int ret;
  48         TDB_CONTEXT *tdb;
  49
  50         tdb = tdb_open(file, 0, TDB_DEFAULT, O_RDONLY, 0600);
  51         if (!tdb) {
  52                 DEBUG(0,("Failed to open group mapping database\n"));
  53                 return NT_STATUS_UNSUCCESSFUL;
  54         }
  55
  56         /* Cope with byte-reversed older versions of the db. */
  57         vers_id = tdb_fetch_int32(tdb, "INFO/version");
  58         if ((vers_id == DATABASE_VERSION_V1) || (IREV(vers_id) == DATABASE_VERSION_V1)) {
  59                 /* Written on a bigendian machine with old fetch_int code. Save as le. */
  60                 vers_id = DATABASE_VERSION_V2;
  61         }
  62
  63         if (vers_id != DATABASE_VERSION_V2) {
  64                 DEBUG(0, ("Group database version mismatch: %d\n", vers_id));
  65                 return NT_STATUS_UNSUCCESSFUL;
  66         }
  67
  68         db->groupmappings = NULL;
  69         db->groupmap_count = 0;
  70         db->aliases = NULL;
  71         db->alias_count = 0;
  72
  73         for (kbuf = tdb_firstkey(tdb);
  74              kbuf.dptr;
  75              newkey = tdb_nextkey(tdb, kbuf), safe_free(kbuf.dptr), kbuf=newkey) {
  76                 struct samba3_groupmapping map;
  77
  78                 if (strncmp(kbuf.dptr, GROUP_PREFIX, strlen(GROUP_PREFIX)) == 0)
  79                 {
  80                         dbuf = tdb_fetch(tdb, kbuf);
  81                         if (!dbuf.dptr)
  82                                 continue;
  83
  84                         ZERO_STRUCT(map);
  85
  86                         map.sid = dom_sid_parse_talloc(ctx, kbuf.dptr+strlen(GROUP_PREFIX));
  87
  88                         ret = tdb_unpack(tdb, dbuf.dptr, dbuf.dsize, "dd",
  89                                                          &map.gid, &map.sid_name_use);
  90
  91                         if ( ret == -1 ) {
  92                                 DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
  93                                 continue;
  94                         }
  95
  96                         map.nt_name = talloc_strdup(ctx, dbuf.dptr+ret);
  97                         map.comment = talloc_strdup(ctx, dbuf.dptr+ret+strlen(map.nt_name));
  98
  99                         db->groupmappings = talloc_realloc(ctx, db->groupmappings, struct samba3_groupmapping, db->groupmap_count+1);
 100
 101                         if (!db->groupmappings)
 102                                 return NT_STATUS_NO_MEMORY;
 103
 104                         db->groupmappings[db->groupmap_count] = map;
 105
 106                         db->groupmap_count++;
 107                 } else if (strncmp(kbuf.dptr, MEMBEROF_PREFIX, strlen(MEMBEROF_PREFIX)) == 0)
 108                 {
 109                         struct samba3_alias alias;
 110                         const char **member_strlist;
 111                         int i;
 112
 113                         dbuf = tdb_fetch(tdb, kbuf);
 114                         if (!dbuf.dptr)
 115                                 continue;
 116
 117                         alias.sid = dom_sid_parse_talloc(ctx, kbuf.dptr+strlen(MEMBEROF_PREFIX));
 118                         alias.member_count = 0;
 119                         alias.members = NULL;
 120
 121                         member_strlist = str_list_make_shell(ctx, dbuf.dptr, " ");
 122
 123                         for (i = 0; member_strlist[i]; i++) {
 124                                 alias.members = talloc_realloc(ctx, alias.members, struct dom_sid *, alias.member_count+1);
 125                                 alias.members[alias.member_count] = dom_sid_parse_talloc(ctx, member_strlist[i]);
 126                                 alias.member_count++;
 127                         }
 128
 129                         talloc_free(member_strlist);
 130
 131                         db->aliases = talloc_realloc(ctx, db->aliases, struct samba3_alias, db->alias_count+1);
 132                         db->aliases[db->alias_count] = alias;
 133                         db->alias_count++;
 134                 }
 135         }
 136
 137         tdb_close(tdb);
 138
 139         return NT_STATUS_OK;
 140 }