source/passdb/util_wellknown.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Lookup routines for well-known SIDs
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
   6    Copyright (C) Jeremy Allison  1999
   7    Copyright (C) Volker Lendecke 2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 struct rid_name_map {
  26         uint32 rid;
  27         const char *name;
  28 };
  29
  30 struct sid_name_map_info
  31 {
  32         const DOM_SID *sid;
  33         const char *name;
  34         const struct rid_name_map *known_users;
  35 };
  36
  37 static const struct rid_name_map everyone_users[] = {
  38         { 0, "Everyone" },
  39         { 0, NULL}};
  40
  41 static const struct rid_name_map creator_owner_users[] = {
  42         { 0, "Creator Owner" },
  43         { 1, "Creator Group" },
  44         { 0, NULL}};
  45
  46 static const struct rid_name_map nt_authority_users[] = {
  47         {  1, "Dialup" },
  48         {  2, "Network"},
  49         {  3, "Batch"},
  50         {  4, "Interactive"},
  51         {  6, "Service"},
  52         {  7, "AnonymousLogon"},
  53         {  8, "Proxy"},
  54         {  9, "ServerLogon"},
  55         { 10, "Self"},
  56         { 11, "Authenticated Users"},
  57         { 12, "Restricted"},
  58         { 13, "Terminal Server User"},
  59         { 14, "Remote Interactive Logon"},
  60         { 15, "This Organization"},
  61         { 18, "SYSTEM"},
  62         { 19, "Local Service"},
  63         { 20, "Network Service"},
  64         {  0,  NULL}};
  65
  66 static struct sid_name_map_info special_domains[] = {
  67         { &global_sid_World_Domain, "", everyone_users },
  68         { &global_sid_Creator_Owner_Domain, "", creator_owner_users },
  69         { &global_sid_NT_Authority, "NT Authority", nt_authority_users },
  70         { NULL, NULL, NULL }};
  71
  72 bool sid_check_is_wellknown_domain(const DOM_SID *sid, const char **name)
  73 {
  74         int i;
  75
  76         for (i=0; special_domains[i].sid != NULL; i++) {
  77                 if (sid_equal(sid, special_domains[i].sid)) {
  78                         if (name != NULL) {
  79                                 *name = special_domains[i].name;
  80                         }
  81                         return True;
  82                 }
  83         }
  84         return False;
  85 }
  86
  87 bool sid_check_is_in_wellknown_domain(const DOM_SID *sid)
  88 {
  89         DOM_SID dom_sid;
  90         uint32 rid;
  91
  92         sid_copy(&dom_sid, sid);
  93         sid_split_rid(&dom_sid, &rid);
  94
  95         return sid_check_is_wellknown_domain(&dom_sid, NULL);
  96 }
  97
  98 /**************************************************************************
  99  Looks up a known username from one of the known domains.
 100 ***************************************************************************/
 101
 102 bool lookup_wellknown_sid(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
 103                           const char **domain, const char **name)
 104 {
 105         int i;
 106         DOM_SID dom_sid;
 107         uint32 rid;
 108         const struct rid_name_map *users = NULL;
 109
 110         sid_copy(&dom_sid, sid);
 111         if (!sid_split_rid(&dom_sid, &rid)) {
 112                 DEBUG(2, ("Could not split rid from SID\n"));
 113                 return False;
 114         }
 115
 116         for (i=0; special_domains[i].sid != NULL; i++) {
 117                 if (sid_equal(&dom_sid, special_domains[i].sid)) {
 118                         *domain = talloc_strdup(mem_ctx,
 119                                                 special_domains[i].name);
 120                         users = special_domains[i].known_users;
 121                         break;
 122                 }
 123         }
 124
 125         if (users == NULL) {
 126                 DEBUG(10, ("SID %s is no special sid\n",
 127                            sid_string_static(sid)));
 128                 return False;
 129         }
 130
 131         for (i=0; users[i].name != NULL; i++) {
 132                 if (rid == users[i].rid) {
 133                         *name = talloc_strdup(mem_ctx, users[i].name);
 134                         return True;
 135                 }
 136         }
 137
 138         DEBUG(10, ("RID of special SID %s not found\n",
 139                    sid_string_static(sid)));
 140
 141         return False;
 142 }
 143
 144 /**************************************************************************
 145  Try and map a name to one of the well known SIDs.
 146 ***************************************************************************/
 147
 148 bool lookup_wellknown_name(TALLOC_CTX *mem_ctx, const char *name,
 149                            DOM_SID *sid, const char **domain)
 150 {
 151         int i, j;
 152
 153         DEBUG(10,("map_name_to_wellknown_sid: looking up %s\n", name));
 154
 155         for (i=0; special_domains[i].sid != NULL; i++) {
 156                 const struct rid_name_map *users =
 157                         special_domains[i].known_users;
 158
 159                 if (users == NULL)
 160                         continue;
 161
 162                 for (j=0; users[j].name != NULL; j++) {
 163                         if ( strequal(users[j].name, name) ) {
 164                                 sid_copy(sid, special_domains[i].sid);
 165                                 sid_append_rid(sid, users[j].rid);
 166                                 *domain = talloc_strdup(
 167                                         mem_ctx, special_domains[i].name);
 168                                 return True;
 169                         }
 170                 }
 171         }
 172
 173         return False;
 174 }