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 #include "idmap.h"
  24 #include "../libcli/security/dom_sid.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_IDMAP
  28
  29 struct idmap_rid_context {
  30         uint32_t base_rid;
  31 };
  32
  33 /******************************************************************************
  34   compat params can't be used because of the completely different way
  35   we support multiple domains in the new idmap
  36  *****************************************************************************/
  37
  38 static NTSTATUS idmap_rid_initialize(struct idmap_domain *dom,
  39                                      const char *params)
  40 {
  41         NTSTATUS ret;
  42         struct idmap_rid_context *ctx;
  43         char *config_option = NULL;
  44
  45         ctx = TALLOC_ZERO_P(dom, struct idmap_rid_context);
  46         if (ctx == NULL) {
  47                 DEBUG(0, ("Out of memory!\n"));
  48                 return NT_STATUS_NO_MEMORY;
  49         }
  50
  51         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
  52         if ( ! config_option) {
  53                 DEBUG(0, ("Out of memory!\n"));
  54                 ret = NT_STATUS_NO_MEMORY;
  55                 goto failed;
  56         }
  57
  58         ctx->base_rid = lp_parm_int(-1, config_option, "base_rid", 0);
  59
  60         dom->private_data = ctx;
  61
  62         talloc_free(config_option);
  63         return NT_STATUS_OK;
  64
  65 failed:
  66         talloc_free(ctx);
  67         return ret;
  68 }
  69
  70 static NTSTATUS idmap_rid_id_to_sid(struct idmap_domain *dom, struct id_map *map)
  71 {
  72         struct winbindd_domain *domain;
  73         struct idmap_rid_context *ctx;
  74
  75         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
  76
  77         /* apply filters before checking */
  78         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
  79                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
  80                                 map->xid.id, dom->low_id, dom->high_id));
  81                 return NT_STATUS_NONE_MAPPED;
  82         }
  83
  84         domain = find_domain_from_name_noinit(dom->name);
  85         if (domain == NULL ) {
  86                 return NT_STATUS_NO_SUCH_DOMAIN;
  87         }
  88
  89         sid_compose(map->sid, &domain->sid, map->xid.id - dom->low_id + ctx->base_rid);
  90
  91         /* We **really** should have some way of validating
  92            the SID exists and is the correct type here.  But
  93            that is a deficiency in the idmap_rid design. */
  94
  95         map->status = ID_MAPPED;
  96
  97         return NT_STATUS_OK;
  98 }
  99
 100 /**********************************
 101  Single sid to id lookup function.
 102 **********************************/
 103
 104 static NTSTATUS idmap_rid_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 105 {
 106         uint32_t rid;
 107         struct idmap_rid_context *ctx;
 108
 109         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
 110
 111         sid_peek_rid(map->sid, &rid);
 112         map->xid.id = rid - ctx->base_rid + dom->low_id;
 113
 114         /* apply filters before returning result */
 115
 116         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 117                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 118                                 map->xid.id, dom->low_id, dom->high_id));
 119                 map->status = ID_UNMAPPED;
 120                 return NT_STATUS_NONE_MAPPED;
 121         }
 122
 123         map->status = ID_MAPPED;
 124
 125         return NT_STATUS_OK;
 126 }
 127
 128 /**********************************
 129  lookup a set of unix ids.
 130 **********************************/
 131
 132 static NTSTATUS idmap_rid_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 133 {
 134         NTSTATUS ret;
 135         int i;
 136
 137         /* initialize the status to avoid suprise */
 138         for (i = 0; ids[i]; i++) {
 139                 ids[i]->status = ID_UNKNOWN;
 140         }
 141
 142         for (i = 0; ids[i]; i++) {
 143
 144                 ret = idmap_rid_id_to_sid(dom, ids[i]);
 145
 146                 if (( ! NT_STATUS_IS_OK(ret)) &&
 147                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 148                         /* some fatal error occurred, log it */
 149                         DEBUG(3, ("Unexpected error resolving an ID (%d)\n", ids[i]->xid.id));
 150                 }
 151         }
 152
 153         return NT_STATUS_OK;
 154 }
 155
 156 /**********************************
 157  lookup a set of sids.
 158 **********************************/
 159
 160 static NTSTATUS idmap_rid_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 161 {
 162         NTSTATUS ret;
 163         int i;
 164
 165         /* initialize the status to avoid suprise */
 166         for (i = 0; ids[i]; i++) {
 167                 ids[i]->status = ID_UNKNOWN;
 168         }
 169
 170         for (i = 0; ids[i]; i++) {
 171
 172                 ret = idmap_rid_sid_to_id(dom, ids[i]);
 173
 174                 if (( ! NT_STATUS_IS_OK(ret)) &&
 175                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 176                         /* some fatal error occurred, log it */
 177                         DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
 178                                   sid_string_dbg(ids[i]->sid)));
 179                 }
 180         }
 181
 182         return NT_STATUS_OK;
 183 }
 184
 185 static NTSTATUS idmap_rid_close(struct idmap_domain *dom)
 186 {
 187         if (dom->private_data) {
 188                 TALLOC_FREE(dom->private_data);
 189         }
 190         return NT_STATUS_OK;
 191 }
 192
 193 static struct idmap_methods rid_methods = {
 194         .init = idmap_rid_initialize,
 195         .unixids_to_sids = idmap_rid_unixids_to_sids,
 196         .sids_to_unixids = idmap_rid_sids_to_unixids,
 197         .close_fn = idmap_rid_close
 198 };
 199
 200 NTSTATUS idmap_rid_init(void)
 201 {
 202         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "rid", &rid_methods);
 203 }
 204