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 <tevent.h>
  24 #include "../lib/util/tevent_ntstatus.h"
  25 #include "libcli/composite/composite.h"
  26 #include "winbind/wb_server.h"
  27 #include "smbd/service_task.h"
  28 #include "libcli/security/security.h"
  29 #include "../lib/util/dlinklist.h"
  30 #include "param/param.h"
  31
  32 static struct wbsrv_domain *find_domain_from_sid(struct wbsrv_service *service,
  33                                                  const struct dom_sid *sid)
  34 {
  35         struct wbsrv_domain *domain;
  36
  37         for (domain = service->domains; domain!=NULL; domain = domain->next) {
  38                 if (dom_sid_equal(domain->info->sid, sid)) {
  39                         break;
  40                 }
  41                 if (dom_sid_in_domain(domain->info->sid, sid)) {
  42                         break;
  43                 }
  44         }
  45         return domain;
  46 }
  47
  48 struct wb_sid2domain_state {
  49         struct wbsrv_service *service;
  50         struct dom_sid sid;
  51
  52         struct wbsrv_domain *domain;
  53 };
  54
  55 static void wb_sid2domain_recv_dom_info(struct composite_context *ctx);
  56 static void wb_sid2domain_recv_name(struct composite_context *ctx);
  57 static void wb_sid2domain_recv_trusted_dom_info(struct composite_context *ctx);
  58 static void wb_sid2domain_recv_init(struct composite_context *ctx);
  59
  60 static struct tevent_req *_wb_sid2domain_send(TALLOC_CTX *mem_ctx,
  61                                               struct tevent_context *ev,
  62                                               struct wbsrv_service *service,
  63                                               const struct dom_sid *sid)
  64 {
  65         struct tevent_req *req;
  66         struct wb_sid2domain_state *state;
  67         struct composite_context *ctx;
  68
  69         DEBUG(5, ("wb_sid2domain_send called\n"));
  70
  71         req = tevent_req_create(mem_ctx, &state,
  72                                 struct wb_sid2domain_state);
  73         if (req == NULL) {
  74                 return NULL;
  75         }
  76
  77         state->service = service;
  78         state->sid = *sid;
  79
  80         state->domain = find_domain_from_sid(service, sid);
  81         if (state->domain != NULL) {
  82                 tevent_req_done(req);
  83                 return tevent_req_post(req, ev);
  84         }
  85
  86         if (dom_sid_equal(service->primary_sid, sid) ||
  87             dom_sid_in_domain(service->primary_sid, sid)) {
  88                 ctx = wb_get_dom_info_send(state, service,
  89                                            lpcfg_workgroup(service->task->lp_ctx),
  90                                            lpcfg_realm(service->task->lp_ctx),
  91                                            service->primary_sid);
  92                 if (tevent_req_nomem(ctx, req)) {
  93                         return tevent_req_post(req, ev);
  94                 }
  95                 ctx->async.fn = wb_sid2domain_recv_dom_info;
  96                 ctx->async.private_data = req;
  97
  98                 return req;
  99         }
 100
 101         ctx = wb_cmd_lookupsid_send(state, service, &state->sid);
 102         if (tevent_req_nomem(ctx, req)) {
 103                 return tevent_req_post(req, ev);
 104         }
 105         ctx->async.fn = wb_sid2domain_recv_name;
 106         ctx->async.private_data = req;
 107
 108         return req;
 109 }
 110
 111 static void wb_sid2domain_recv_dom_info(struct composite_context *ctx)
 112 {
 113         struct tevent_req *req =
 114                 talloc_get_type_abort(ctx->async.private_data,
 115                 struct tevent_req);
 116         struct wb_sid2domain_state *state =
 117                 tevent_req_data(req,
 118                 struct wb_sid2domain_state);
 119         struct wb_dom_info *info;
 120         NTSTATUS status;
 121
 122         status = wb_get_dom_info_recv(ctx, state, &info);
 123         if (tevent_req_nterror(req, status)) {
 124                 return;
 125         }
 126
 127         ctx = wb_init_domain_send(state, state->service, info);
 128         if (tevent_req_nomem(ctx, req)) {
 129                 return;
 130         }
 131         ctx->async.fn = wb_sid2domain_recv_init;
 132         ctx->async.private_data = req;
 133 }
 134
 135 static void wb_sid2domain_recv_name(struct composite_context *ctx)
 136 {
 137         struct tevent_req *req =
 138                 talloc_get_type_abort(ctx->async.private_data,
 139                 struct tevent_req);
 140         struct wb_sid2domain_state *state =
 141                 tevent_req_data(req,
 142                 struct wb_sid2domain_state);
 143         struct wb_sid_object *name;
 144         NTSTATUS status;
 145
 146         status = wb_cmd_lookupsid_recv(ctx, state, &name);
 147         if (tevent_req_nterror(req, status)) {
 148                 return;
 149         }
 150
 151         if (name->type == SID_NAME_UNKNOWN) {
 152                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_DOMAIN);
 153                 return;
 154         }
 155
 156         if (name->type != SID_NAME_DOMAIN) {
 157                 state->sid.num_auths -= 1;
 158         }
 159
 160         ctx = wb_trusted_dom_info_send(state, state->service, name->domain,
 161                                        &state->sid);
 162         if (tevent_req_nomem(ctx, req)) {
 163                 return;
 164         }
 165         ctx->async.fn = wb_sid2domain_recv_trusted_dom_info;
 166         ctx->async.private_data = req;
 167 }
 168
 169 static void wb_sid2domain_recv_trusted_dom_info(struct composite_context *ctx)
 170 {
 171         struct tevent_req *req =
 172                 talloc_get_type_abort(ctx->async.private_data,
 173                 struct tevent_req);
 174         struct wb_sid2domain_state *state =
 175                 tevent_req_data(req,
 176                 struct wb_sid2domain_state);
 177         struct wb_dom_info *info;
 178         NTSTATUS status;
 179
 180         status = wb_trusted_dom_info_recv(ctx, state, &info);
 181         if (tevent_req_nterror(req, status)) {
 182                 return;
 183         }
 184
 185         ctx = wb_init_domain_send(state, state->service, info);
 186         if (tevent_req_nomem(ctx, req)) {
 187                 return;
 188         }
 189         ctx->async.fn = wb_sid2domain_recv_init;
 190         ctx->async.private_data = req;
 191 }
 192
 193 static void wb_sid2domain_recv_init(struct composite_context *ctx)
 194 {
 195         struct tevent_req *req =
 196                 talloc_get_type_abort(ctx->async.private_data,
 197                 struct tevent_req);
 198         struct wb_sid2domain_state *state =
 199                 tevent_req_data(req,
 200                 struct wb_sid2domain_state);
 201         struct wbsrv_domain *existing;
 202         NTSTATUS status;
 203
 204         status = wb_init_domain_recv(ctx, state, &state->domain);
 205         if (tevent_req_nterror(req, status)) {
 206                 DEBUG(10, ("Could not init domain\n"));
 207                 return;
 208         }
 209
 210         existing = find_domain_from_sid(state->service, &state->sid);
 211         if (existing != NULL) {
 212                 DEBUG(5, ("Initialized domain twice, dropping second one\n"));
 213                 talloc_free(state->domain);
 214                 state->domain = existing;
 215         } else {
 216                 talloc_steal(state->service, state->domain);
 217                 DLIST_ADD(state->service->domains, state->domain);
 218         }
 219
 220         tevent_req_done(req);
 221 }
 222
 223 static NTSTATUS _wb_sid2domain_recv(struct tevent_req *req,
 224                                     struct wbsrv_domain **result)
 225 {
 226         struct wb_sid2domain_state *state =
 227                 tevent_req_data(req,
 228                 struct wb_sid2domain_state);
 229         NTSTATUS status;
 230
 231         if (tevent_req_is_nterror(req, &status)) {
 232                 tevent_req_received(req);
 233                 return status;
 234         }
 235
 236         *result = state->domain;
 237         tevent_req_received(req);
 238         return NT_STATUS_OK;
 239 }
 240
 241 struct sid2domain_state {
 242         struct composite_context *ctx;
 243         struct wbsrv_domain *domain;
 244 };
 245
 246 static void sid2domain_recv_domain(struct tevent_req *subreq);
 247
 248 struct composite_context *wb_sid2domain_send(TALLOC_CTX *mem_ctx,
 249                                              struct wbsrv_service *service,
 250                                              const struct dom_sid *sid)
 251 {
 252         struct composite_context *result;
 253         struct sid2domain_state *state;
 254         struct tevent_req *subreq;
 255
 256         DEBUG(5, ("wb_sid2domain_send called\n"));
 257         result = composite_create(mem_ctx, service->task->event_ctx);
 258         if (result == NULL) goto failed;
 259
 260         state = talloc(result, struct sid2domain_state);
 261         if (state == NULL) goto failed;
 262         state->ctx = result;
 263         result->private_data = state;
 264
 265         subreq = _wb_sid2domain_send(state,
 266                                      result->event_ctx,
 267                                      service, sid);
 268         if (subreq == NULL) goto failed;
 269         tevent_req_set_callback(subreq, sid2domain_recv_domain, state);
 270
 271         return result;
 272
 273  failed:
 274         talloc_free(result);
 275         return NULL;
 276
 277 }
 278
 279 static void sid2domain_recv_domain(struct tevent_req *subreq)
 280 {
 281         struct sid2domain_state *state =
 282                 tevent_req_callback_data(subreq,
 283                                 struct sid2domain_state);
 284
 285         state->ctx->status = _wb_sid2domain_recv(subreq, &state->domain);
 286         TALLOC_FREE(subreq);
 287         if (!composite_is_ok(state->ctx)) return;
 288
 289         composite_done(state->ctx);
 290 }
 291
 292 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 293                             struct wbsrv_domain **result)
 294 {
 295         NTSTATUS status = composite_wait(ctx);
 296         if (NT_STATUS_IS_OK(status)) {
 297                 struct sid2domain_state *state =
 298                         talloc_get_type(ctx->private_data,
 299                                         struct sid2domain_state);
 300                 *result = state->domain;
 301         }
 302         talloc_free(ctx);
 303         return status;
 304 }
 305
 306 NTSTATUS wb_sid2domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 307                        const struct dom_sid *sid,
 308                        struct wbsrv_domain **result)
 309 {
 310         struct composite_context *c = wb_sid2domain_send(mem_ctx, service,
 311                                                          sid);
 312         return wb_sid2domain_recv(c, result);
 313 }