source3/passdb/pdb_util.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Authentication utility functions
   4  *  Copyright (C) Andrew Tridgell 1992-1998
   5  *  Copyright (C) Andrew Bartlett 2001
   6  *  Copyright (C) Jeremy Allison 2000-2001
   7  *  Copyright (C) Rafal Szczesniak 2002
   8  *  Copyright (C) Volker Lendecke 2006
   9  *  Copyright (C) Michael Adam 2007
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License as published by
  13  *  the Free Software Foundation; either version 3 of the License, or
  14  *  (at your option) any later version.
  15  *
  16  *  This program is distributed in the hope that it will be useful,
  17  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *  GNU General Public License for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License
  22  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #include "includes.h"
  26 #include "../libcli/security/security.h"
  27 #include "passdb.h"
  28 #include "lib/winbind_util.h"
  29 #include "../librpc/gen_ndr/idmap.h"
  30
  31 /**
  32  * Add sid as a member of builtin_sid.
  33  *
  34  * @param[in] builtin_sid       An existing builtin group.
  35  * @param[in] dom_sid           sid to add as a member of builtin_sid.
  36  * @return Normal NTSTATUS return
  37  */
  38 static NTSTATUS add_sid_to_builtin(const struct dom_sid *builtin_sid,
  39                                    const struct dom_sid *dom_sid)
  40 {
  41         NTSTATUS status = NT_STATUS_OK;
  42
  43         if (!dom_sid || !builtin_sid) {
  44                 return NT_STATUS_INVALID_PARAMETER;
  45         }
  46
  47         status = pdb_add_aliasmem(builtin_sid, dom_sid);
  48
  49         if (NT_STATUS_EQUAL(status, NT_STATUS_MEMBER_IN_ALIAS)) {
  50                 DEBUG(5, ("add_sid_to_builtin %s is already a member of %s\n",
  51                           sid_string_dbg(dom_sid),
  52                           sid_string_dbg(builtin_sid)));
  53                 return NT_STATUS_OK;
  54         }
  55
  56         if (!NT_STATUS_IS_OK(status)) {
  57                 DEBUG(4, ("add_sid_to_builtin %s could not be added to %s: "
  58                           "%s\n", sid_string_dbg(dom_sid),
  59                           sid_string_dbg(builtin_sid), nt_errstr(status)));
  60         }
  61         return status;
  62 }
  63
  64 /**
  65  * Create the requested BUILTIN if it doesn't already exist.  This requires
  66  * winbindd to be running.
  67  *
  68  * @param[in] rid BUILTIN rid to create
  69  * @return Normal NTSTATUS return.
  70  */
  71 NTSTATUS pdb_create_builtin(uint32_t rid)
  72 {
  73         NTSTATUS status = NT_STATUS_OK;
  74         struct dom_sid sid;
  75         gid_t gid;
  76         bool mapresult;
  77
  78         if (!sid_compose(&sid, &global_sid_Builtin, rid)) {
  79                 return NT_STATUS_NO_SUCH_ALIAS;
  80         }
  81
  82         if (!pdb_is_responsible_for_builtin()) {
  83                 /*
  84                  * if this backend is not responsible for BUILTIN
  85                  *
  86                  * Use the gid from the mapping request for entry.
  87                  * If the mapping fails, bail out
  88                  */
  89                 mapresult = sid_to_gid(&sid, &gid);
  90                 if (!mapresult) {
  91                         status = NT_STATUS_NO_SUCH_GROUP;
  92                 } else {
  93                         status = pdb_create_builtin_alias(rid, gid);
  94                 }
  95         } else {
  96                 /*
  97                  * this backend is responsible for BUILTIN
  98                  *
  99                  * a failed mapping result means that the entry
 100                  * does not exist yet, so create it
 101                  *
 102                  * we use pdb_sid_to_id intentionally here to
 103                  * directly query the passdb backend (sid_to_gid
 104                  * would finally do the same)
 105                  */
 106                 struct unixid id;
 107                 mapresult = pdb_sid_to_id(&sid, &id);
 108                 if (!mapresult) {
 109                         if (!lp_winbind_nested_groups() || !winbind_ping()) {
 110                                 return NT_STATUS_PROTOCOL_UNREACHABLE;
 111                         }
 112                         status = pdb_create_builtin_alias(rid, 0);
 113                 }
 114         }
 115         return status;
 116 }
 117
 118 /*******************************************************************
 119 *******************************************************************/
 120
 121 NTSTATUS create_builtin_users(const struct dom_sid *dom_sid)
 122 {
 123         NTSTATUS status;
 124         struct dom_sid dom_users;
 125
 126         status = pdb_create_builtin(BUILTIN_RID_USERS);
 127         if ( !NT_STATUS_IS_OK(status) ) {
 128                 DEBUG(5,("create_builtin_users: Failed to create Users\n"));
 129                 return status;
 130         }
 131
 132         /* add domain users */
 133         if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
 134                 && sid_compose(&dom_users, dom_sid, DOMAIN_RID_USERS))
 135         {
 136                 status = add_sid_to_builtin(&global_sid_Builtin_Users,
 137                                             &dom_users);
 138         }
 139
 140         return status;
 141 }
 142
 143 /*******************************************************************
 144 *******************************************************************/
 145
 146 NTSTATUS create_builtin_administrators(const struct dom_sid *dom_sid)
 147 {
 148         NTSTATUS status;
 149         struct dom_sid dom_admins, root_sid;
 150         fstring root_name;
 151         enum lsa_SidType type;
 152         TALLOC_CTX *ctx;
 153         bool ret;
 154
 155         status = pdb_create_builtin(BUILTIN_RID_ADMINISTRATORS);
 156         if ( !NT_STATUS_IS_OK(status) ) {
 157                 DEBUG(5,("create_builtin_administrators: Failed to create Administrators\n"));
 158                 return status;
 159         }
 160
 161         /* add domain admins */
 162         if ((IS_DC || (lp_server_role() == ROLE_DOMAIN_MEMBER))
 163                 && sid_compose(&dom_admins, dom_sid, DOMAIN_RID_ADMINS))
 164         {
 165                 status = add_sid_to_builtin(&global_sid_Builtin_Administrators,
 166                                             &dom_admins);
 167                 if (!NT_STATUS_IS_OK(status)) {
 168                         return status;
 169                 }
 170         }
 171
 172         /* add root */
 173         if ( (ctx = talloc_init("create_builtin_administrators")) == NULL ) {
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176         fstr_sprintf( root_name, "%s\\root", get_global_sam_name() );
 177         ret = lookup_name(ctx, root_name, LOOKUP_NAME_DOMAIN, NULL, NULL,
 178                           &root_sid, &type);
 179         TALLOC_FREE( ctx );
 180
 181         if ( ret ) {
 182                 status = add_sid_to_builtin(&global_sid_Builtin_Administrators,
 183                                             &root_sid);
 184         }
 185
 186         return status;
 187 }