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 "winbind/wb_helper.h"
  27 #include "libcli/security/security.h"
  28 #include "winbind/idmap.h"
  29
  30 struct sid2gid_state {
  31         struct composite_context *ctx;
  32         struct wbsrv_service *service;
  33         gid_t gid;
  34 };
  35
  36 static void sid2gid_recv_gid(struct composite_context *ctx);
  37
  38 struct composite_context *wb_sid2gid_send(TALLOC_CTX *mem_ctx,
  39                 struct wbsrv_service *service, const struct dom_sid *sid)
  40 {
  41         struct composite_context *result, *ctx;
  42         struct sid2gid_state *state;
  43         struct id_mapping *ids;
  44
  45         DEBUG(5, ("wb_sid2gid_send called\n"));
  46
  47         result = composite_create(mem_ctx, service->task->event_ctx);
  48         if (!result) return NULL;
  49
  50         state = talloc(result, struct sid2gid_state);
  51         if(composite_nomem(state, result)) return result;
  52
  53         state->ctx = result;
  54         result->private_data = state;
  55         state->service = service;
  56
  57         ids = talloc(result, struct id_mapping);
  58         if (composite_nomem(ids, result)) return result;
  59
  60         ids->sid = dom_sid_dup(result, sid);
  61         if (composite_nomem(ids->sid, result)) return result;
  62
  63         ctx = wb_sids2xids_send(result, service, 1, ids);
  64         if (composite_nomem(ctx, result)) return result;
  65
  66         composite_continue(result, ctx, sid2gid_recv_gid, state);
  67         return result;
  68 }
  69
  70 static void sid2gid_recv_gid(struct composite_context *ctx)
  71 {
  72         struct sid2gid_state *state = talloc_get_type(ctx->async.private_data,
  73                                                       struct sid2gid_state);
  74
  75         struct id_mapping *ids = NULL;
  76
  77         state->ctx->status = wb_sids2xids_recv(ctx, &ids);
  78         if (!composite_is_ok(state->ctx)) return;
  79
  80         if (!NT_STATUS_IS_OK(ids->status)) {
  81                 composite_error(state->ctx, ids->status);
  82                 return;
  83         }
  84
  85         if (ids->unixid->type == ID_TYPE_BOTH ||
  86             ids->unixid->type == ID_TYPE_GID) {
  87                 state->gid = ids->unixid->id;
  88                 composite_done(state->ctx);
  89         } else {
  90                 composite_error(state->ctx, NT_STATUS_INVALID_SID);
  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