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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/composite/composite.h"
  25 #include "winbind/wb_server.h"
  26 #include "smbd/service_task.h"
  27 #include "winbind/wb_async_helpers.h"
  28 #include "libcli/security/security.h"
  29 #include "lib/util/dlinklist.h"
  30
  31 static struct wbsrv_domain *find_domain_from_sid(struct wbsrv_service *service,
  32                                                  const struct dom_sid *sid)
  33 {
  34         struct wbsrv_domain *domain;
  35
  36         for (domain = service->domains; domain!=NULL; domain = domain->next) {
  37                 if (dom_sid_equal(domain->info->sid, sid)) {
  38                         break;
  39                 }
  40                 if (dom_sid_in_domain(domain->info->sid, sid)) {
  41                         break;
  42                 }
  43         }
  44         return domain;
  45 }
  46
  47 struct sid2domain_state {
  48         struct composite_context *ctx;
  49         struct wbsrv_service *service;
  50         struct dom_sid *sid;
  51
  52         struct wbsrv_domain *domain;
  53 };
  54
  55 static void sid2domain_recv_dom_info(struct composite_context *ctx);
  56 static void sid2domain_recv_name(struct composite_context *ctx);
  57 static void sid2domain_recv_trusted_dom_info(struct composite_context *ctx);
  58 static void sid2domain_recv_init(struct composite_context *ctx);
  59
  60 struct composite_context *wb_sid2domain_send(TALLOC_CTX *mem_ctx,
  61                                              struct wbsrv_service *service,
  62                                              const struct dom_sid *sid)
  63 {
  64         struct composite_context *result, *ctx;
  65         struct sid2domain_state *state;
  66
  67         result = talloc_zero(mem_ctx, struct composite_context);
  68         if (result == NULL) goto failed;
  69         result->state = COMPOSITE_STATE_IN_PROGRESS;
  70         result->async.fn = NULL;
  71         result->event_ctx = service->task->event_ctx;
  72
  73         state = talloc(result, struct sid2domain_state);
  74         if (state == NULL) goto failed;
  75         state->ctx = result;
  76         result->private_data = state;
  77
  78         state->service = service;
  79         state->sid = dom_sid_dup(state, sid);
  80         if (state->sid == NULL) goto failed;
  81
  82         state->domain = find_domain_from_sid(service, sid);
  83         if (state->domain != NULL) {
  84                 result->status = NT_STATUS_OK;
  85                 composite_done(result);
  86                 return result;
  87         }
  88
  89         if (dom_sid_equal(service->primary_sid, sid) ||
  90             dom_sid_in_domain(service->primary_sid, sid)) {
  91                 ctx = wb_get_dom_info_send(state, service, lp_workgroup(),
  92                                            service->primary_sid);
  93                 if (ctx == NULL) goto failed;
  94                 ctx->async.fn = sid2domain_recv_dom_info;
  95                 ctx->async.private_data = state;
  96                 return result;
  97         }
  98
  99         ctx = wb_cmd_lookupsid_send(state, service, state->sid);
 100         if (ctx == NULL) goto failed;
 101         ctx->async.fn = sid2domain_recv_name;
 102         ctx->async.private_data = state;
 103         return result;
 104
 105  failed:
 106         talloc_free(result);
 107         return NULL;
 108
 109 }
 110
 111 static void sid2domain_recv_dom_info(struct composite_context *ctx)
 112 {
 113         struct sid2domain_state *state =
 114                 talloc_get_type(ctx->async.private_data,
 115                                 struct sid2domain_state);
 116         struct wb_dom_info *info;
 117
 118         state->ctx->status = wb_get_dom_info_recv(ctx, state, &info);
 119         if (!composite_is_ok(state->ctx)) return;
 120
 121         ctx = wb_init_domain_send(state, state->service, info);
 122
 123         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 124 }
 125
 126 static void sid2domain_recv_name(struct composite_context *ctx)
 127 {
 128         struct sid2domain_state *state =
 129                 talloc_get_type(ctx->async.private_data,
 130                                 struct sid2domain_state);
 131         struct wb_sid_object *name;
 132
 133         state->ctx->status = wb_cmd_lookupsid_recv(ctx, state, &name);
 134         if (!composite_is_ok(state->ctx)) return;
 135
 136         if (name->type == SID_NAME_UNKNOWN) {
 137                 composite_error(state->ctx, NT_STATUS_NO_SUCH_DOMAIN);
 138                 return;
 139         }
 140
 141         if (name->type != SID_NAME_DOMAIN) {
 142                 state->sid->num_auths -= 1;
 143         }
 144
 145         ctx = wb_trusted_dom_info_send(state, state->service, name->domain,
 146                                        state->sid);
 147
 148         composite_continue(state->ctx, ctx, sid2domain_recv_trusted_dom_info,
 149                            state);
 150 }
 151
 152 static void sid2domain_recv_trusted_dom_info(struct composite_context *ctx)
 153 {
 154         struct sid2domain_state *state =
 155                 talloc_get_type(ctx->async.private_data,
 156                                 struct sid2domain_state);
 157         struct wb_dom_info *info;
 158
 159         state->ctx->status = wb_trusted_dom_info_recv(ctx, state, &info);
 160         if (!composite_is_ok(state->ctx)) return;
 161
 162         ctx = wb_init_domain_send(state, state->service, info);
 163
 164         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 165 }
 166
 167 static void sid2domain_recv_init(struct composite_context *ctx)
 168 {
 169         struct sid2domain_state *state =
 170                 talloc_get_type(ctx->async.private_data,
 171                                 struct sid2domain_state);
 172         struct wbsrv_domain *existing;
 173
 174         state->ctx->status = wb_init_domain_recv(ctx, state,
 175                                                  &state->domain);
 176         if (!composite_is_ok(state->ctx)) {
 177                 DEBUG(10, ("Could not init domain\n"));
 178                 return;
 179         }
 180
 181         existing = find_domain_from_sid(state->service, state->sid);
 182         if (existing != NULL) {
 183                 DEBUG(5, ("Initialized domain twice, dropping second one\n"));
 184                 talloc_free(state->domain);
 185                 state->domain = existing;
 186         }
 187
 188         talloc_steal(state->service, state->domain);
 189         DLIST_ADD(state->service->domains, state->domain);
 190
 191         composite_done(state->ctx);
 192 }
 193
 194 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 195                             struct wbsrv_domain **result)
 196 {
 197         NTSTATUS status = composite_wait(ctx);
 198         if (NT_STATUS_IS_OK(status)) {
 199                 struct sid2domain_state *state =
 200                         talloc_get_type(ctx->private_data,
 201                                         struct sid2domain_state);
 202                 *result = state->domain;
 203         }
 204         talloc_free(ctx);
 205         return status;
 206 }
 207
 208 NTSTATUS wb_sid2domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 209                        const struct dom_sid *sid,
 210                        struct wbsrv_domain **result)
 211 {
 212         struct composite_context *c = wb_sid2domain_send(mem_ctx, service,
 213                                                          sid);
 214         return wb_sid2domain_recv(c, result);
 215 }