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 {
  40         NTSTATUS ret;
  41         struct idmap_rid_context *ctx;
  42         char *config_option = NULL;
  43
  44         ctx = talloc_zero(dom, struct idmap_rid_context);
  45         if (ctx == NULL) {
  46                 DEBUG(0, ("Out of memory!\n"));
  47                 return NT_STATUS_NO_MEMORY;
  48         }
  49
  50         config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
  51         if ( ! config_option) {
  52                 DEBUG(0, ("Out of memory!\n"));
  53                 ret = NT_STATUS_NO_MEMORY;
  54                 goto failed;
  55         }
  56
  57         ctx->base_rid = lp_parm_int(-1, config_option, "base_rid", 0);
  58
  59         dom->private_data = ctx;
  60
  61         talloc_free(config_option);
  62         return NT_STATUS_OK;
  63
  64 failed:
  65         talloc_free(ctx);
  66         return ret;
  67 }
  68
  69 static NTSTATUS idmap_rid_id_to_sid(struct idmap_domain *dom, struct id_map *map)
  70 {
  71         struct winbindd_domain *domain;
  72         struct idmap_rid_context *ctx;
  73
  74         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
  75
  76         /* apply filters before checking */
  77         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
  78                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
  79                                 map->xid.id, dom->low_id, dom->high_id));
  80                 return NT_STATUS_NONE_MAPPED;
  81         }
  82
  83         domain = find_domain_from_name_noinit(dom->name);
  84         if (domain == NULL ) {
  85                 return NT_STATUS_NO_SUCH_DOMAIN;
  86         }
  87
  88         sid_compose(map->sid, &domain->sid, map->xid.id - dom->low_id + ctx->base_rid);
  89
  90         /* We **really** should have some way of validating
  91            the SID exists and is the correct type here.  But
  92            that is a deficiency in the idmap_rid design. */
  93
  94         map->status = ID_MAPPED;
  95
  96         return NT_STATUS_OK;
  97 }
  98
  99 /**********************************
 100  Single sid to id lookup function.
 101 **********************************/
 102
 103 static NTSTATUS idmap_rid_sid_to_id(struct idmap_domain *dom, struct id_map *map)
 104 {
 105         uint32_t rid;
 106         struct idmap_rid_context *ctx;
 107
 108         ctx = talloc_get_type(dom->private_data, struct idmap_rid_context);
 109
 110         sid_peek_rid(map->sid, &rid);
 111         map->xid.id = rid - ctx->base_rid + dom->low_id;
 112
 113         /* apply filters before returning result */
 114
 115         if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
 116                 DEBUG(5, ("Requested id (%u) out of range (%u - %u). Filtered!\n",
 117                                 map->xid.id, dom->low_id, dom->high_id));
 118                 map->status = ID_UNMAPPED;
 119                 return NT_STATUS_NONE_MAPPED;
 120         }
 121
 122         map->status = ID_MAPPED;
 123
 124         return NT_STATUS_OK;
 125 }
 126
 127 /**********************************
 128  lookup a set of unix ids.
 129 **********************************/
 130
 131 static NTSTATUS idmap_rid_unixids_to_sids(struct idmap_domain *dom, struct id_map **ids)
 132 {
 133         NTSTATUS ret;
 134         int i;
 135
 136         /* initialize the status to avoid suprise */
 137         for (i = 0; ids[i]; i++) {
 138                 ids[i]->status = ID_UNKNOWN;
 139         }
 140
 141         for (i = 0; ids[i]; i++) {
 142
 143                 ret = idmap_rid_id_to_sid(dom, ids[i]);
 144
 145                 if (( ! NT_STATUS_IS_OK(ret)) &&
 146                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 147                         /* some fatal error occurred, log it */
 148                         DEBUG(3, ("Unexpected error resolving an ID (%d)\n", ids[i]->xid.id));
 149                 }
 150         }
 151
 152         return NT_STATUS_OK;
 153 }
 154
 155 /**********************************
 156  lookup a set of sids.
 157 **********************************/
 158
 159 static NTSTATUS idmap_rid_sids_to_unixids(struct idmap_domain *dom, struct id_map **ids)
 160 {
 161         NTSTATUS ret;
 162         int i;
 163
 164         /* initialize the status to avoid suprise */
 165         for (i = 0; ids[i]; i++) {
 166                 ids[i]->status = ID_UNKNOWN;
 167         }
 168
 169         for (i = 0; ids[i]; i++) {
 170
 171                 ret = idmap_rid_sid_to_id(dom, ids[i]);
 172
 173                 if (( ! NT_STATUS_IS_OK(ret)) &&
 174                     ( ! NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED))) {
 175                         /* some fatal error occurred, log it */
 176                         DEBUG(3, ("Unexpected error resolving a SID (%s)\n",
 177                                   sid_string_dbg(ids[i]->sid)));
 178                 }
 179         }
 180
 181         return NT_STATUS_OK;
 182 }
 183
 184 static struct idmap_methods rid_methods = {
 185         .init = idmap_rid_initialize,
 186         .unixids_to_sids = idmap_rid_unixids_to_sids,
 187         .sids_to_unixids = idmap_rid_sids_to_unixids,
 188 };
 189
 190 NTSTATUS samba_init_module(void)
 191 {
 192         return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION, "rid", &rid_methods);
 193 }
 194