source4/winbind/wb_cmd_usersids.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Command backend for wbinfo --user-sids
   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 "librpc/gen_ndr/ndr_samr_c.h"
  27 #include "libcli/security/security.h"
  28
  29 /* Calculate the token in two steps: Go the user's originating domain, ask for
  30  * the user's domain groups. Then with the resulting list of sids go to our
  31  * own domain to expand the aliases aka domain local groups. */
  32
  33 struct cmd_usersids_state {
  34         struct composite_context *ctx;
  35         struct wbsrv_service *service;
  36         struct dom_sid *user_sid;
  37         uint32_t num_domgroups;
  38         struct dom_sid **domgroups;
  39
  40         struct lsa_SidArray lsa_sids;
  41         struct samr_Ids rids;
  42         struct samr_GetAliasMembership r;
  43
  44         uint32_t num_sids;
  45         struct dom_sid **sids;
  46 };
  47
  48 static void usersids_recv_domgroups(struct composite_context *ctx);
  49 static void usersids_recv_domain(struct composite_context *ctx);
  50 static void usersids_recv_aliases(struct tevent_req *subreq);
  51
  52 struct composite_context *wb_cmd_usersids_send(TALLOC_CTX *mem_ctx,
  53                                                struct wbsrv_service *service,
  54                                                const struct dom_sid *sid)
  55 {
  56         struct composite_context *result, *ctx;
  57         struct cmd_usersids_state *state;
  58
  59
  60         result = composite_create(mem_ctx, service->task->event_ctx);
  61         if (result == NULL) goto failed;
  62
  63         state = talloc(result, struct cmd_usersids_state);
  64         if (state == NULL) goto failed;
  65         state->ctx = result;
  66         result->private_data = state;
  67
  68         state->service = service;
  69         state->user_sid = dom_sid_dup(state, sid);
  70         if (state->user_sid == NULL) goto failed;
  71
  72         ctx = wb_cmd_userdomgroups_send(state, service, sid);
  73         if (ctx == NULL) goto failed;
  74
  75         ctx->async.fn = usersids_recv_domgroups;
  76         ctx->async.private_data = state;
  77         return result;
  78
  79  failed:
  80         talloc_free(result);
  81         return NULL;
  82 }
  83
  84 static void usersids_recv_domgroups(struct composite_context *ctx)
  85 {
  86         struct cmd_usersids_state *state =
  87                 talloc_get_type(ctx->async.private_data,
  88                                 struct cmd_usersids_state);
  89
  90         state->ctx->status = wb_cmd_userdomgroups_recv(ctx, state,
  91                                                        &state->num_domgroups,
  92                                                        &state->domgroups);
  93         if (!composite_is_ok(state->ctx)) return;
  94
  95         ctx = wb_sid2domain_send(state, state->service,
  96                                  state->service->primary_sid);
  97         composite_continue(state->ctx, ctx, usersids_recv_domain, state);
  98 }
  99
 100 static void usersids_recv_domain(struct composite_context *ctx)
 101 {
 102         struct cmd_usersids_state *state =
 103                 talloc_get_type(ctx->async.private_data,
 104                                 struct cmd_usersids_state);
 105         struct tevent_req *subreq;
 106         struct wbsrv_domain *domain;
 107         uint32_t i;
 108
 109         state->ctx->status = wb_sid2domain_recv(ctx, &domain);
 110         if (!composite_is_ok(state->ctx)) return;
 111
 112         state->lsa_sids.num_sids = state->num_domgroups+1;
 113         state->lsa_sids.sids = talloc_array(state, struct lsa_SidPtr,
 114                                             state->lsa_sids.num_sids);
 115         if (composite_nomem(state->lsa_sids.sids, state->ctx)) return;
 116
 117         state->lsa_sids.sids[0].sid = state->user_sid;
 118         for (i=0; i<state->num_domgroups; i++) {
 119                 state->lsa_sids.sids[i+1].sid = state->domgroups[i];
 120         }
 121
 122         state->rids.count = 0;
 123         state->rids.ids = NULL;
 124
 125         state->r.in.domain_handle = &domain->libnet_ctx->samr.handle;
 126         state->r.in.sids = &state->lsa_sids;
 127         state->r.out.rids = &state->rids;
 128
 129         subreq = dcerpc_samr_GetAliasMembership_r_send(state,
 130                                                        state->ctx->event_ctx,
 131                                                        domain->libnet_ctx->samr.pipe->binding_handle,
 132                                                        &state->r);
 133         if (composite_nomem(subreq, state->ctx)) return;
 134         tevent_req_set_callback(subreq, usersids_recv_aliases, state);
 135 }
 136
 137 static void usersids_recv_aliases(struct tevent_req *subreq)
 138 {
 139         struct cmd_usersids_state *state =
 140                 tevent_req_callback_data(subreq,
 141                 struct cmd_usersids_state);
 142         uint32_t i;
 143
 144         state->ctx->status = dcerpc_samr_GetAliasMembership_r_recv(subreq, state);
 145         TALLOC_FREE(subreq);
 146         if (!composite_is_ok(state->ctx)) return;
 147         state->ctx->status = state->r.out.result;
 148         if (!composite_is_ok(state->ctx)) return;
 149
 150         state->num_sids = 1 + state->num_domgroups + state->r.out.rids->count;
 151         state->sids = talloc_array(state, struct dom_sid *, state->num_sids);
 152         if (composite_nomem(state->sids, state->ctx)) return;
 153
 154         state->sids[0] = talloc_steal(state->sids, state->user_sid);
 155
 156         for (i=0; i<state->num_domgroups; i++) {
 157                 state->sids[1+i] =
 158                         talloc_steal(state->sids, state->domgroups[i]);
 159         }
 160
 161         for (i=0; i<state->r.out.rids->count; i++) {
 162                 state->sids[1+state->num_domgroups+i] = dom_sid_add_rid(
 163                         state->sids, state->service->primary_sid,
 164                         state->r.out.rids->ids[i]);
 165
 166                 if (composite_nomem(state->sids[1+state->num_domgroups+i],
 167                                     state->ctx)) return;
 168         }
 169
 170         composite_done(state->ctx);
 171 }
 172
 173 NTSTATUS wb_cmd_usersids_recv(struct composite_context *ctx,
 174                               TALLOC_CTX *mem_ctx,
 175                               uint32_t *num_sids, struct dom_sid ***sids)
 176 {
 177         NTSTATUS status = composite_wait(ctx);
 178         if (NT_STATUS_IS_OK(status)) {
 179                 struct cmd_usersids_state *state =
 180                         talloc_get_type(ctx->private_data,
 181                                         struct cmd_usersids_state);
 182                 *num_sids = state->num_sids;
 183                 *sids = talloc_steal(mem_ctx, state->sids);
 184         }
 185         talloc_free(ctx);
 186         return status;
 187 }
 188
 189 NTSTATUS wb_cmd_usersids(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
 190                          const struct dom_sid *sid,
 191                          uint32_t *num_sids, struct dom_sid ***sids)
 192 {
 193         struct composite_context *c =
 194                 wb_cmd_usersids_send(mem_ctx, service, sid);
 195         return wb_cmd_usersids_recv(c, mem_ctx, num_sids, sids);
 196 }
 197