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 "libcli/security/security.h"
  27 #include "../lib/util/dlinklist.h"
  28 #include "param/param.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         DEBUG(5, ("wb_sid2domain_send called\n"));
  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,
  88                                            lpcfg_workgroup(service->task->lp_ctx),
  89                                            lpcfg_realm(service->task->lp_ctx),
  90                                            service->primary_sid);
  91                 if (ctx == NULL) goto failed;
  92                 ctx->async.fn = sid2domain_recv_dom_info;
  93                 ctx->async.private_data = state;
  94                 return result;
  95         }
  96
  97         ctx = wb_cmd_lookupsid_send(state, service, state->sid);
  98         if (ctx == NULL) goto failed;
  99         composite_continue(result, ctx, sid2domain_recv_name, state);
 100
 101         return result;
 102
 103  failed:
 104         talloc_free(result);
 105         return NULL;
 106
 107 }
 108
 109 static void sid2domain_recv_dom_info(struct composite_context *ctx)
 110 {
 111         struct sid2domain_state *state =
 112                 talloc_get_type(ctx->async.private_data,
 113                                 struct sid2domain_state);
 114         struct wb_dom_info *info;
 115
 116         state->ctx->status = wb_get_dom_info_recv(ctx, state, &info);
 117         if (!composite_is_ok(state->ctx)) return;
 118
 119         ctx = wb_init_domain_send(state, state->service, info);
 120
 121         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 122 }
 123
 124 static void sid2domain_recv_name(struct composite_context *ctx)
 125 {
 126         struct sid2domain_state *state =
 127                 talloc_get_type(ctx->async.private_data,
 128                                 struct sid2domain_state);
 129         struct wb_sid_object *name;
 130
 131         state->ctx->status = wb_cmd_lookupsid_recv(ctx, state, &name);
 132         if (!composite_is_ok(state->ctx)) return;
 133
 134         if (name->type == SID_NAME_UNKNOWN) {
 135                 composite_error(state->ctx, NT_STATUS_NO_SUCH_DOMAIN);
 136                 return;
 137         }
 138
 139         if (name->type != SID_NAME_DOMAIN) {
 140                 state->sid->num_auths -= 1;
 141         }
 142
 143         ctx = wb_trusted_dom_info_send(state, state->service, name->domain,
 144                                        state->sid);
 145
 146         composite_continue(state->ctx, ctx, sid2domain_recv_trusted_dom_info,
 147                            state);
 148 }
 149
 150 static void sid2domain_recv_trusted_dom_info(struct composite_context *ctx)
 151 {
 152         struct sid2domain_state *state =
 153                 talloc_get_type(ctx->async.private_data,
 154                                 struct sid2domain_state);
 155         struct wb_dom_info *info;
 156
 157         state->ctx->status = wb_trusted_dom_info_recv(ctx, state, &info);
 158         if (!composite_is_ok(state->ctx)) return;
 159
 160         ctx = wb_init_domain_send(state, state->service, info);
 161
 162         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 163 }
 164
 165 static void sid2domain_recv_init(struct composite_context *ctx)
 166 {
 167         struct sid2domain_state *state =
 168                 talloc_get_type(ctx->async.private_data,
 169                                 struct sid2domain_state);
 170         struct wbsrv_domain *existing;
 171
 172         state->ctx->status = wb_init_domain_recv(ctx, state,
 173                                                  &state->domain);
 174         if (!composite_is_ok(state->ctx)) {
 175                 DEBUG(10, ("Could not init domain\n"));
 176                 return;
 177         }
 178
 179         existing = find_domain_from_sid(state->service, state->sid);
 180         if (existing != NULL) {
 181                 DEBUG(5, ("Initialized domain twice, dropping second one\n"));
 182                 talloc_free(state->domain);
 183                 state->domain = existing;
 184         }
 185
 186         talloc_steal(state->service, state->domain);
 187         DLIST_ADD(state->service->domains, state->domain);
 188
 189         composite_done(state->ctx);
 190 }
 191
 192 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 193                             struct wbsrv_domain **result)
 194 {
 195         NTSTATUS status = composite_wait(ctx);
 196         if (NT_STATUS_IS_OK(status)) {
 197                 struct sid2domain_state *state =
 198                         talloc_get_type(ctx->private_data,
 199                                         struct sid2domain_state);
 200                 *result = state->domain;
 201         }
 202         talloc_free(ctx);
 203         return status;
 204 }
 205
 206 NTSTATUS wb_sid2domain(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 207                        const struct dom_sid *sid,
 208                        struct wbsrv_domain **result)
 209 {
 210         struct composite_context *c = wb_sid2domain_send(mem_ctx, service,
 211                                                          sid);
 212         return wb_sid2domain_recv(c, result);
 213 }