source4/winbind/wb_sid2gid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Map a SID to a gid
   5
   6    Copyright (C) 2007-2008  Kai Blin
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/composite/composite.h"
  24 #include "winbind/wb_server.h"
  25 #include "smbd/service_task.h"
  26 #include "libcli/security/security.h"
  27
  28 struct sid2gid_state {
  29         struct composite_context *ctx;
  30         struct wbsrv_service *service;
  31         gid_t gid;
  32 };
  33
  34 static void sid2gid_recv_gid(struct composite_context *ctx);
  35
  36 struct composite_context *wb_sid2gid_send(TALLOC_CTX *mem_ctx,
  37                 struct wbsrv_service *service, const struct dom_sid *sid)
  38 {
  39         struct composite_context *result, *ctx;
  40         struct sid2gid_state *state;
  41         struct id_map *ids;
  42
  43         DEBUG(5, ("wb_sid2gid_send called\n"));
  44
  45         result = composite_create(mem_ctx, service->task->event_ctx);
  46         if (!result) return NULL;
  47
  48         state = talloc(result, struct sid2gid_state);
  49         if(composite_nomem(state, result)) return result;
  50
  51         state->ctx = result;
  52         result->private_data = state;
  53         state->service = service;
  54
  55         ids = talloc(result, struct id_map);
  56         if (composite_nomem(ids, result)) return result;
  57
  58         ids->sid = dom_sid_dup(result, sid);
  59         if (composite_nomem(ids->sid, result)) return result;
  60
  61         ctx = wb_sids2xids_send(result, service, 1, ids);
  62         if (composite_nomem(ctx, result)) return result;
  63
  64         composite_continue(result, ctx, sid2gid_recv_gid, state);
  65         return result;
  66 }
  67
  68 static void sid2gid_recv_gid(struct composite_context *ctx)
  69 {
  70         struct sid2gid_state *state = talloc_get_type(ctx->async.private_data,
  71                                                       struct sid2gid_state);
  72
  73         struct id_map *ids = NULL;
  74
  75         state->ctx->status = wb_sids2xids_recv(ctx, &ids, NULL);
  76         if (!composite_is_ok(state->ctx)) return;
  77
  78         if (ids->status != ID_MAPPED) {
  79                 composite_error(state->ctx, NT_STATUS_UNSUCCESSFUL);
  80                 return;
  81         }
  82
  83         if (ids->xid.type == ID_TYPE_BOTH ||
  84             ids->xid.type == ID_TYPE_GID) {
  85                 state->gid = ids->xid.id;
  86                 composite_done(state->ctx);
  87                 return;
  88         } else {
  89                 composite_error(state->ctx, NT_STATUS_INVALID_SID);
  90                 return;
  91         }
  92 }
  93
  94 NTSTATUS wb_sid2gid_recv(struct composite_context *ctx, gid_t *gid)
  95 {
  96         NTSTATUS status = composite_wait(ctx);
  97
  98         DEBUG(5, ("wb_sid2gid_recv called\n"));
  99
 100         if (NT_STATUS_IS_OK(status)) {
 101                 struct sid2gid_state *state =
 102                         talloc_get_type(ctx->private_data,
 103                                 struct sid2gid_state);
 104                 *gid = state->gid;
 105         }
 106         talloc_free(ctx);
 107         return status;
 108 }
 109