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