source4/winbind/wb_sid2domain.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Find and init a domain struct for a SID
   5
   6    Copyright (C) Volker Lendecke 2005
   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_async_helpers.h"
  27 #include "libcli/security/security.h"
  28 #include "lib/util/dlinklist.h"
  29
  30 static struct wbsrv_domain *find_domain_from_sid(struct wbsrv_service *service,
  31                                                  const struct dom_sid *sid)
  32 {
  33         struct wbsrv_domain *domain;
  34
  35         for (domain = service->domains; domain!=NULL; domain = domain->next) {
  36                 if (dom_sid_equal(domain->info->sid, sid)) {
  37                         break;
  38                 }
  39                 if (dom_sid_in_domain(domain->info->sid, sid)) {
  40                         break;
  41                 }
  42         }
  43         return domain;
  44 }
  45
  46 struct sid2domain_state {
  47         struct composite_context *ctx;
  48         struct wbsrv_service *service;
  49         struct dom_sid *sid;
  50
  51         struct wbsrv_domain *domain;
  52 };
  53
  54 static void sid2domain_recv_dom_info(struct composite_context *ctx);
  55 static void sid2domain_recv_name(struct composite_context *ctx);
  56 static void sid2domain_recv_trusted_dom_info(struct composite_context *ctx);
  57 static void sid2domain_recv_init(struct composite_context *ctx);
  58
  59 struct composite_context *wb_sid2domain_send(TALLOC_CTX *mem_ctx,
  60                                              struct wbsrv_service *service,
  61                                              const struct dom_sid *sid)
  62 {
  63         struct composite_context *result, *ctx;
  64         struct sid2domain_state *state;
  65
  66         result = composite_create(mem_ctx, service->task->event_ctx);
  67         if (result == NULL) goto failed;
  68
  69         state = talloc(result, struct sid2domain_state);
  70         if (state == NULL) goto failed;
  71         state->ctx = result;
  72         result->private_data = state;
  73
  74         state->service = service;
  75         state->sid = dom_sid_dup(state, sid);
  76         if (state->sid == NULL) goto failed;
  77
  78         state->domain = find_domain_from_sid(service, sid);
  79         if (state->domain != NULL) {
  80                 result->status = NT_STATUS_OK;
  81                 composite_done(result);
  82                 return result;
  83         }
  84
  85         if (dom_sid_equal(service->primary_sid, sid) ||
  86             dom_sid_in_domain(service->primary_sid, sid)) {
  87                 ctx = wb_get_dom_info_send(state, service, lp_workgroup(),
  88                                            service->primary_sid);
  89                 if (ctx == NULL) goto failed;
  90                 ctx->async.fn = sid2domain_recv_dom_info;
  91                 ctx->async.private_data = state;
  92                 return result;
  93         }
  94
  95         ctx = wb_cmd_lookupsid_send(state, service, state->sid);
  96         if (ctx == NULL) goto failed;
  97         composite_continue(result, ctx, sid2domain_recv_name, ctx->async.private_data);
  98
  99         return result;
 100
 101  failed:
 102         talloc_free(result);
 103         return NULL;
 104
 105 }
 106
 107 static void sid2domain_recv_dom_info(struct composite_context *ctx)
 108 {
 109         struct sid2domain_state *state =
 110                 talloc_get_type(ctx->async.private_data,
 111                                 struct sid2domain_state);
 112         struct wb_dom_info *info;
 113
 114         state->ctx->status = wb_get_dom_info_recv(ctx, state, &info);
 115         if (!composite_is_ok(state->ctx)) return;
 116
 117         ctx = wb_init_domain_send(state, state->service, info);
 118
 119         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 120 }
 121
 122 static void sid2domain_recv_name(struct composite_context *ctx)
 123 {
 124         struct sid2domain_state *state =
 125                 talloc_get_type(ctx->async.private_data,
 126                                 struct sid2domain_state);
 127         struct wb_sid_object *name;
 128
 129         state->ctx->status = wb_cmd_lookupsid_recv(ctx, state, &name);
 130         if (!composite_is_ok(state->ctx)) return;
 131
 132         if (name->type == SID_NAME_UNKNOWN) {
 133                 composite_error(state->ctx, NT_STATUS_NO_SUCH_DOMAIN);
 134                 return;
 135         }
 136
 137         if (name->type != SID_NAME_DOMAIN) {
 138                 state->sid->num_auths -= 1;
 139         }
 140
 141         ctx = wb_trusted_dom_info_send(state, state->service, name->domain,
 142                                        state->sid);
 143
 144         composite_continue(state->ctx, ctx, sid2domain_recv_trusted_dom_info,
 145                            state);
 146 }
 147
 148 static void sid2domain_recv_trusted_dom_info(struct composite_context *ctx)
 149 {
 150         struct sid2domain_state *state =
 151                 talloc_get_type(ctx->async.private_data,
 152                                 struct sid2domain_state);
 153         struct wb_dom_info *info;
 154
 155         state->ctx->status = wb_trusted_dom_info_recv(ctx, state, &info);
 156         if (!composite_is_ok(state->ctx)) return;
 157
 158         ctx = wb_init_domain_send(state, state->service, info);
 159
 160         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 161 }
 162
 163 static void sid2domain_recv_init(struct composite_context *ctx)
 164 {
 165         struct sid2domain_state *state =
 166                 talloc_get_type(ctx->async.private_data,
 167                                 struct sid2domain_state);
 168         struct wbsrv_domain *existing;
 169
 170         state->ctx->status = wb_init_domain_recv(ctx, state,
 171                                                  &state->domain);
 172         if (!composite_is_ok(state->ctx)) {
 173                 DEBUG(10, ("Could not init domain\n"));
 174                 return;
 175         }
 176
 177         existing = find_domain_from_sid(state->service, state->sid);
 178         if (existing != NULL) {
 179                 DEBUG(5, ("Initialized domain twice, dropping second one\n"));
 180                 talloc_free(state->domain);
 181                 state->domain = existing;
 182         }
 183
 184         talloc_steal(state->service, state->domain);
 185         DLIST_ADD(state->service->domains, state->domain);
 186
 187         composite_done(state->ctx);
 188 }
 189
 190 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 191                             struct wbsrv_domain **result)
 192 {
 193         NTSTATUS status = composite_wait(ctx);
 194         if (NT_STATUS_IS_OK(status)) {
 195                 struct sid2domain_state *state =
 196                         talloc_get_type(ctx->private_data,
 197                                         struct sid2domain_state);
 198                 *result = state->domain;
 199         }
 200         talloc_free(ctx);
 201         return status;
 202 }
 203
 204 NTSTATUS wb_sid2domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 205                        const struct dom_sid *sid,
 206                        struct wbsrv_domain **result)
 207 {
 208         struct composite_context *c = wb_sid2domain_send(mem_ctx, service,
 209                                                          sid);
 210         return wb_sid2domain_recv(c, result);
 211 }