source/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_stream.h"
  27 #include "smbd/service_task.h"
  28 #include "lib/events/events.h"
  29 #include "librpc/gen_ndr/nbt.h"
  30 #include "librpc/gen_ndr/ndr_netlogon.h"
  31 #include "winbind/wb_async_helpers.h"
  32 #include "include/dlinklist.h"
  33
  34 static const char *sam_name(void)
  35 {
  36         if (lp_server_role() == ROLE_STANDALONE) {
  37                 return lp_netbios_name();
  38         }
  39         return lp_workgroup();
  40 }
  41
  42 static struct wbsrv_domain *find_primary_domain(struct wbsrv_service *service)
  43 {
  44         const char *my_domain_name = sam_name();
  45         struct wbsrv_domain *domain;
  46
  47         for (domain = service->domains; domain!=NULL; domain = domain->next) {
  48                 if (strcasecmp(domain->name, my_domain_name) == 0) {
  49                         break;
  50                 }
  51         }
  52         return domain;
  53 }
  54
  55 static struct wbsrv_domain *find_domain_from_sid(struct wbsrv_service *service,
  56                                                  const struct dom_sid *sid)
  57 {
  58         struct wbsrv_domain *domain;
  59
  60         for (domain = service->domains; domain!=NULL; domain = domain->next) {
  61                 if (dom_sid_equal(domain->sid, sid)) {
  62                         break;
  63                 }
  64                 if (dom_sid_in_domain(domain->sid, sid)) {
  65                         break;
  66                 }
  67         }
  68         return domain;
  69 }
  70
  71 struct sid2domain_state {
  72         struct composite_context *ctx;
  73         struct wbsrv_service *service;
  74         const struct dom_sid *sid;
  75
  76         const char *domain_name;
  77         const char *dc_name;
  78         struct dom_sid *domain_sid;
  79
  80         struct wbsrv_domain *my_domain;
  81         struct wbsrv_domain *result;
  82 };
  83
  84 static void sid2domain_recv_name(struct composite_context *ctx);
  85 static void sid2domain_recv_dcname(struct composite_context *ctx);
  86 static void sid2domain_recv_init(struct composite_context *ctx);
  87
  88 struct composite_context *wb_sid2domain_send(struct wbsrv_service *service,
  89                                              const struct dom_sid *sid)
  90 {
  91         struct composite_context *result, *ctx;
  92         struct sid2domain_state *state;
  93
  94         result = talloc_zero(NULL, struct composite_context);
  95         if (result == NULL) goto failed;
  96         result->state = COMPOSITE_STATE_IN_PROGRESS;
  97         result->async.fn = NULL;
  98         result->event_ctx = service->task->event_ctx;
  99
 100         state = talloc(result, struct sid2domain_state);
 101         if (state == NULL) goto failed;
 102         state->ctx = result;
 103         result->private_data = state;
 104
 105         state->service = service;
 106         state->sid = dom_sid_dup(state, sid);
 107         if (state->sid == NULL) goto failed;
 108
 109         state->result = find_domain_from_sid(service, sid);
 110         if (state->result != NULL) {
 111                 result->status = NT_STATUS_OK;
 112                 if (!state->result->initialized) {
 113                         ctx = wb_init_domain_send(state->result,
 114                                                   service->task->event_ctx,
 115                                                   service->task->msg_ctx);
 116                         if (ctx == NULL) goto failed;
 117                         ctx->async.fn = sid2domain_recv_init;
 118                         ctx->async.private_data = state;
 119                         return result;
 120                 }
 121                 composite_trigger_done(result);
 122                 return result;
 123         }
 124
 125         state->my_domain = find_primary_domain(service);
 126         if (state->my_domain == NULL) {
 127                 result->status = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 128                 composite_trigger_error(result);
 129                 return result;
 130         }
 131
 132         ctx = wb_cmd_lookupsid_send(service, state->my_domain, state->sid);
 133         if (ctx == NULL) goto failed;
 134         ctx->async.fn = sid2domain_recv_name;
 135         ctx->async.private_data = state;
 136         return result;
 137
 138  failed:
 139         talloc_free(result);
 140         return NULL;
 141 }
 142
 143 static void sid2domain_recv_name(struct composite_context *ctx)
 144 {
 145         struct sid2domain_state *state =
 146                 talloc_get_type(ctx->async.private_data,
 147                                 struct sid2domain_state);
 148         struct wb_sid_object *name;
 149
 150         state->ctx->status = wb_cmd_lookupsid_recv(ctx, state, &name);
 151         if (!composite_is_ok(state->ctx)) return;
 152
 153         if (name->type == SID_NAME_UNKNOWN) {
 154                 composite_error(state->ctx, NT_STATUS_NO_SUCH_DOMAIN);
 155                 return;
 156         }
 157
 158         state->domain_name = name->domain;
 159         state->domain_sid = dom_sid_dup(state, state->sid);
 160         if (name->type != SID_NAME_DOMAIN) {
 161                 state->domain_sid->num_auths -= 1;
 162         }
 163
 164         ctx = wb_cmd_getdcname_send(state->service, state->my_domain,
 165                                     state->domain_name);
 166         composite_continue(state->ctx, ctx, sid2domain_recv_dcname, state);
 167 }
 168
 169 static void sid2domain_recv_dcname(struct composite_context *ctx)
 170 {
 171         struct sid2domain_state *state =
 172                 talloc_get_type(ctx->async.private_data,
 173                                 struct sid2domain_state);
 174
 175         state->ctx->status = wb_cmd_getdcname_recv(ctx, state,
 176                                                    &state->dc_name);
 177         if (!composite_is_ok(state->ctx)) return;
 178
 179         state->result = talloc_zero(state, struct wbsrv_domain);
 180         if (composite_nomem(state->result, state->ctx)) return;
 181
 182         state->result->name = talloc_steal(state->result, state->domain_name);
 183         state->result->sid = talloc_steal(state->result, state->domain_sid);
 184         state->result->dcname = talloc_steal(state->result, state->dc_name);
 185
 186         state->result->schannel_creds = cli_credentials_init(state->result);
 187         if (composite_nomem(state->result->schannel_creds, state->ctx)) return;
 188         cli_credentials_set_conf(state->result->schannel_creds);
 189         cli_credentials_set_anonymous(state->result->schannel_creds);
 190
 191         talloc_steal(state->service, state->result);
 192         DLIST_ADD(state->service->domains, state->result);
 193
 194         ctx = wb_init_domain_send(state->result,
 195                                   state->service->task->event_ctx,
 196                                   state->service->task->msg_ctx);
 197         composite_continue(state->ctx, ctx, sid2domain_recv_init, state);
 198 }
 199
 200 static void sid2domain_recv_init(struct composite_context *ctx)
 201 {
 202         struct sid2domain_state *state =
 203                 talloc_get_type(ctx->async.private_data,
 204                                 struct sid2domain_state);
 205
 206         state->ctx->status = wb_init_domain_recv(ctx);
 207         if (!composite_is_ok(state->ctx)) return;
 208
 209         composite_done(state->ctx);
 210 }
 211
 212 NTSTATUS wb_sid2domain_recv(struct composite_context *ctx,
 213                             struct wbsrv_domain **result)
 214 {
 215         NTSTATUS status = composite_wait(ctx);
 216         if (NT_STATUS_IS_OK(status)) {
 217                 struct sid2domain_state *state =
 218                         talloc_get_type(ctx->private_data,
 219                                         struct sid2domain_state);
 220                 *result = state->result;
 221         }
 222         talloc_free(ctx);
 223         return status;
 224 }
 225
 226 NTSTATUS wb_sid2domain(struct wbsrv_service *service,
 227                        const struct dom_sid *sid,
 228                        struct wbsrv_domain **result)
 229 {
 230         struct composite_context *c = wb_sid2domain_send(service, sid);
 231         return wb_sid2domain_recv(c, result);
 232 }