source3/winbindd/idmap_rid.c

   1 /*
   2  *  idmap_rid: static map between Active Directory/NT RIDs and RFC 2307 accounts
   3  *  Copyright (C) Guenther Deschner, 2004
   4  *  Copyright (C) Sumit Bose, 2004
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  *
  19  */
  20
  21 #include "includes.h"
  22 #include "winbindd.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_IDMAP
  26
  27 struct idmap_rid_context {
  28         uint32_t base_rid;
  29 };
  30
  31 /******************************************************************************
  32   compat params can't be used because of the completely different way
  33   we support multiple domains in the new idmap
  34  *****************************************************************************/
  35
  36 static NTSTATUS idmap_rid_initialize(struct idmap_domain *dom,
  37                                      const char *params)
  38 {
  39         NTSTATUS ret;
  40         struct idmap_rid_context *ctx;
  41         char *config_option = NULL;
  42
  43         ctx = TALLOC_ZERO_P(dom, struct idmap_rid_context);
  44         if (ctx == NULL) {
  45                 DEBUG(0, ("Out of memory!\n"));
  46                 return NT_STATUS_NO_MEMORY;
  47         }
  48
  49         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
  50         if ( ! config_option) {
  51                 DEBUG(0, ("Out of memory!\n"));
  52                 ret = NT_STATUS_NO_MEMORY;
  53                 goto failed;
  54         }
  55
  56         ctx->base_rid = lp_parm_int(-1, config_option, "base_rid", 0);
  57
  58         dom->private_data = ctx;
  59
  60         talloc_free(config_option);
  61         return NT_STATUS_OK;
  62
  63 failed:
  64         talloc_free(ctx);
  65         return ret;
  66 }
  67
  68 static NTSTATUS idmap_rid_id_to_sid(struct idmap_domain *dom, struct id_map *map)
  69 {
  70         struct winbindd_domain *domain;
  71         struct idmap_rid_context *ctx;
  72
  73         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
  74
  75         /* apply filters before checking */
  76         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
  77                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
  78                                 map->xid.id, dom->low_id, dom->high_id));
  79                 return NT_STATUS_NONE_MAPPED;
  80         }
  81
  82         domain = find_domain_from_name_noinit(dom->name);
  83         if (domain == NULL ) {
  84                 return NT_STATUS_NO_SUCH_DOMAIN;
  85         }
  86
  87         sid_compose(map->sid, &domain->sid, map->xid.id - dom->low_id + ctx->base_rid);
  88
  89         /* We **really** should have some way of validating
  90            the SID exists and is the correct type here.  But
  91            that is a deficiency in the idmap_rid design. */
  92
  93         map->status = ID_MAPPED;
  94
  95         return NT_STATUS_OK;
  96 }
  97
  98 /**********************************
  99  Single sid to id lookup function.
 100 **********************************/
 101
 102 static NTSTATUS idmap_rid_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 103 {
 104         uint32_t rid;
 105         struct idmap_rid_context *ctx;
 106
 107         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
 108
 109         sid_peek_rid(map->sid, &rid);
 110         map->xid.id = rid - ctx->base_rid + dom->low_id;
 111
 112         /* apply filters before returning result */
 113
 114         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 115                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 116                                 map->xid.id, dom->low_id, dom->high_id));
 117                 map->status = ID_UNMAPPED;
 118                 return NT_STATUS_NONE_MAPPED;
 119         }
 120
 121         map->status = ID_MAPPED;
 122
 123         return NT_STATUS_OK;
 124 }
 125
 126 /**********************************
 127  lookup a set of unix ids.
 128 **********************************/
 129
 130 static NTSTATUS idmap_rid_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 131 {
 132         NTSTATUS ret;
 133         int i;
 134
 135         /* initialize the status to avoid suprise */
 136         for (i = 0; ids[i]; i++) {
 137                 ids[i]->status = ID_UNKNOWN;
 138         }
 139
 140         for (i = 0; ids[i]; i++) {
 141
 142                 ret = idmap_rid_id_to_sid(dom, ids[i]);
 143
 144                 if (( ! NT_STATUS_IS_OK(ret)) &&
 145                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 146                         /* some fatal error occurred, log it */
 147                         DEBUG(3, ("Unexpected error resolving an ID (%d)\n", ids[i]->xid.id));
 148                 }
 149         }
 150
 151         return NT_STATUS_OK;
 152 }
 153
 154 /**********************************
 155  lookup a set of sids.
 156 **********************************/
 157
 158 static NTSTATUS idmap_rid_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 159 {
 160         NTSTATUS ret;
 161         int i;
 162
 163         /* initialize the status to avoid suprise */
 164         for (i = 0; ids[i]; i++) {
 165                 ids[i]->status = ID_UNKNOWN;
 166         }
 167
 168         for (i = 0; ids[i]; i++) {
 169
 170                 ret = idmap_rid_sid_to_id(dom, ids[i]);
 171
 172                 if (( ! NT_STATUS_IS_OK(ret)) &&
 173                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 174                         /* some fatal error occurred, log it */
 175                         DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
 176                                   sid_string_dbg(ids[i]->sid)));
 177                 }
 178         }
 179
 180         return NT_STATUS_OK;
 181 }
 182
 183 static NTSTATUS idmap_rid_close(struct idmap_domain *dom)
 184 {
 185         if (dom->private_data) {
 186                 TALLOC_FREE(dom->private_data);
 187         }
 188         return NT_STATUS_OK;
 189 }
 190
 191 static struct idmap_methods rid_methods = {
 192         .init = idmap_rid_initialize,
 193         .unixids_to_sids = idmap_rid_unixids_to_sids,
 194         .sids_to_unixids = idmap_rid_sids_to_unixids,
 195         .close_fn = idmap_rid_close
 196 };
 197
 198 NTSTATUS idmap_rid_init(void)
 199 {
 200         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "rid", &rid_methods);
 201 }
 202