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         if (dom_sid_equal(&global_sid_Builtin, sid) ||
 102             dom_sid_in_domain(&global_sid_Builtin, sid)) {
 103                 ctx = wb_get_dom_info_send(state, service,
 104                                            "BUILTIN", NULL,
 105                                            &global_sid_Builtin);
 106                 if (tevent_req_nomem(ctx, req)) {
 107                         return tevent_req_post(req, ev);
 108                 }
 109                 ctx->async.fn = wb_sid2domain_recv_dom_info;
 110                 ctx->async.private_data = req;
 111
 112                 return req;
 113         }
 114
 115         ctx = wb_cmd_lookupsid_send(state, service, &state->sid);
 116         if (tevent_req_nomem(ctx, req)) {
 117                 return tevent_req_post(req, ev);
 118         }
 119         ctx->async.fn = wb_sid2domain_recv_name;
 120         ctx->async.private_data = req;
 121
 122         return req;
 123 }
 124
 125 static void wb_sid2domain_recv_dom_info(struct composite_context *ctx)
 126 {
 127         struct tevent_req *req =
 128                 talloc_get_type_abort(ctx->async.private_data,
 129                 struct tevent_req);
 130         struct wb_sid2domain_state *state =
 131                 tevent_req_data(req,
 132                 struct wb_sid2domain_state);
 133         struct wb_dom_info *info;
 134         NTSTATUS status;
 135
 136         status = wb_get_dom_info_recv(ctx, state, &info);
 137         if (tevent_req_nterror(req, status)) {
 138                 return;
 139         }
 140
 141         ctx = wb_init_domain_send(state, state->service, info);
 142         if (tevent_req_nomem(ctx, req)) {
 143                 return;
 144         }
 145         ctx->async.fn = wb_sid2domain_recv_init;
 146         ctx->async.private_data = req;
 147 }
 148
 149 static void wb_sid2domain_recv_name(struct composite_context *ctx)
 150 {
 151         struct tevent_req *req =
 152                 talloc_get_type_abort(ctx->async.private_data,
 153                 struct tevent_req);
 154         struct wb_sid2domain_state *state =
 155                 tevent_req_data(req,
 156                 struct wb_sid2domain_state);
 157         struct wb_sid_object *name;
 158         NTSTATUS status;
 159
 160         status = wb_cmd_lookupsid_recv(ctx, state, &name);
 161         if (tevent_req_nterror(req, status)) {
 162                 return;
 163         }
 164
 165         if (name->type == SID_NAME_UNKNOWN) {
 166                 tevent_req_nterror(req, NT_STATUS_NO_SUCH_DOMAIN);
 167                 return;
 168         }
 169
 170         if (name->type != SID_NAME_DOMAIN) {
 171                 state->sid.num_auths -= 1;
 172         }
 173
 174         ctx = wb_trusted_dom_info_send(state, state->service, name->domain,
 175                                        &state->sid);
 176         if (tevent_req_nomem(ctx, req)) {
 177                 return;
 178         }
 179         ctx->async.fn = wb_sid2domain_recv_trusted_dom_info;
 180         ctx->async.private_data = req;
 181 }
 182
 183 static void wb_sid2domain_recv_trusted_dom_info(struct composite_context *ctx)
 184 {
 185         struct tevent_req *req =
 186                 talloc_get_type_abort(ctx->async.private_data,
 187                 struct tevent_req);
 188         struct wb_sid2domain_state *state =
 189                 tevent_req_data(req,
 190                 struct wb_sid2domain_state);
 191         struct wb_dom_info *info;
 192         NTSTATUS status;
 193
 194         status = wb_trusted_dom_info_recv(ctx, state, &info);
 195         if (tevent_req_nterror(req, status)) {
 196                 return;
 197         }
 198
 199         ctx = wb_init_domain_send(state, state->service, info);
 200         if (tevent_req_nomem(ctx, req)) {
 201                 return;
 202         }
 203         ctx->async.fn = wb_sid2domain_recv_init;
 204         ctx->async.private_data = req;
 205 }
 206
 207 static void wb_sid2domain_recv_init(struct composite_context *ctx)
 208 {
 209         struct tevent_req *req =
 210                 talloc_get_type_abort(ctx->async.private_data,
 211                 struct tevent_req);
 212         struct wb_sid2domain_state *state =
 213                 tevent_req_data(req,
 214                 struct wb_sid2domain_state);
 215         struct wbsrv_domain *existing;
 216         NTSTATUS status;
 217
 218         status = wb_init_domain_recv(ctx, state, &state->domain);
 219         if (tevent_req_nterror(req, status)) {
 220                 DEBUG(10, ("Could not init domain\n"));
 221                 return;
 222         }
 223
 224         existing = find_domain_from_sid(state->service, &state->sid);
 225         if (existing != NULL) {
 226                 DEBUG(5, ("Initialized domain twice, dropping second one\n"));
 227                 talloc_free(state->domain);
 228                 state->domain = existing;
 229         } else {
 230                 talloc_steal(state->service, state->domain);
 231                 DLIST_ADD(state->service->domains, state->domain);
 232         }
 233
 234         tevent_req_done(req);
 235 }
 236
 237 static NTSTATUS _wb_sid2domain_recv(struct tevent_req *req,
 238                                     struct wbsrv_domain **result)
 239 {
 240         struct wb_sid2domain_state *state =
 241                 tevent_req_data(req,
 242                 struct wb_sid2domain_state);
 243         NTSTATUS status;
 244
 245         if (tevent_req_is_nterror(req, &status)) {
 246                 tevent_req_received(req);
 247                 return status;
 248         }
 249
 250         *result = state->domain;
 251         tevent_req_received(req);
 252         return NT_STATUS_OK;
 253 }
 254
 255 struct sid2domain_state {
 256         struct composite_context *ctx;
 257         struct wbsrv_domain *domain;
 258 };
 259
 260 static void sid2domain_recv_domain(struct tevent_req *subreq);
 261
 262 struct composite_context *wb_sid2domain_send(TALLOC_CTX *mem_ctx,
 263                                              struct wbsrv_service *service,
 264                                              const struct dom_sid *sid)
 265 {
 266         struct composite_context *result;
 267         struct sid2domain_state *state;
 268         struct tevent_req *subreq;
 269
 270         DEBUG(5, ("wb_sid2domain_send called\n"));
 271         result = composite_create(mem_ctx, service->task->event_ctx);
 272         if (result == NULL) goto failed;
 273
 274         state = talloc(result, struct sid2domain_state);
 275         if (state == NULL) goto failed;
 276         state->ctx = result;
 277         result->private_data = state;
 278
 279         subreq = _wb_sid2domain_send(state,
 280                                      result->event_ctx,
 281                                      service, sid);
 282         if (subreq == NULL) goto failed;
 283         tevent_req_set_callback(subreq, sid2domain_recv_domain, state);
 284
 285         return result;
 286
 287  failed:
 288         talloc_free(result);
 289         return NULL;
 290
 291 }
 292
 293 static void sid2domain_recv_domain(struct tevent_req *subreq)
 294 {
 295         struct sid2domain_state *state =
 296                 tevent_req_callback_data(subreq,
 297                                 struct sid2domain_state);
 298
 299         state->ctx->status = _wb_sid2domain_recv(subreq, &state->domain);
 300         TALLOC_FREE(subreq);
 301         if (!composite_is_ok(state->ctx)) return;
 302
 303         composite_done(state->ctx);
 304 }
 305
 306 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 307                             struct wbsrv_domain **result)
 308 {
 309         NTSTATUS status = composite_wait(ctx);
 310         if (NT_STATUS_IS_OK(status)) {
 311                 struct sid2domain_state *state =
 312                         talloc_get_type(ctx->private_data,
 313                                         struct sid2domain_state);
 314                 *result = state->domain;
 315         }
 316         talloc_free(ctx);
 317         return status;
 318 }
 319
 320 NTSTATUS wb_sid2domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 321                        const struct dom_sid *sid,
 322                        struct wbsrv_domain **result)
 323 {
 324         struct composite_context *c = wb_sid2domain_send(mem_ctx, service,
 325                                                          sid);
 326         return wb_sid2domain_recv(c, result);
 327 }