source: vendor/current/source4/winbind/wb_cmd_usersids.c@ 740

/* 
   Unix SMB/CIFS implementation.

   Command backend for wbinfo --user-sids

   Copyright (C) Volker Lendecke 2005
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"
#include "libcli/composite/composite.h"
#include "winbind/wb_server.h"
#include "smbd/service_task.h"
#include "librpc/gen_ndr/ndr_samr_c.h"
#include "libcli/security/security.h"

/* Calculate the token in two steps: Go the user's originating domain, ask for
 * the user's domain groups. Then with the resulting list of sids go to our
 * own domain to expand the aliases aka domain local groups. */

struct cmd_usersids_state {
        struct composite_context *ctx;
        struct wbsrv_service *service;
        struct dom_sid *user_sid;
        uint32_t num_domgroups;
        struct dom_sid **domgroups;

        struct lsa_SidArray lsa_sids;
        struct samr_Ids rids;
        struct samr_GetAliasMembership r;

        uint32_t num_sids;
        struct dom_sid **sids;
};

static void usersids_recv_domgroups(struct composite_context *ctx);
static void usersids_recv_domain(struct composite_context *ctx);
static void usersids_recv_aliases(struct tevent_req *subreq);

struct composite_context *wb_cmd_usersids_send(TALLOC_CTX *mem_ctx,
                                               struct wbsrv_service *service,
                                               const struct dom_sid *sid)
{
        struct composite_context *result, *ctx;
        struct cmd_usersids_state *state;


        result = composite_create(mem_ctx, service->task->event_ctx);
        if (result == NULL) goto failed;

        state = talloc(result, struct cmd_usersids_state);
        if (state == NULL) goto failed;
        state->ctx = result;
        result->private_data = state;

        state->service = service;
        state->user_sid = dom_sid_dup(state, sid);
        if (state->user_sid == NULL) goto failed;

        ctx = wb_cmd_userdomgroups_send(state, service, sid);
        if (ctx == NULL) goto failed;

        ctx->async.fn = usersids_recv_domgroups;
        ctx->async.private_data = state;
        return result;

 failed:
        talloc_free(result);
        return NULL;
}

static void usersids_recv_domgroups(struct composite_context *ctx)
{
        struct cmd_usersids_state *state =
                talloc_get_type(ctx->async.private_data,
                                struct cmd_usersids_state);

        state->ctx->status = wb_cmd_userdomgroups_recv(ctx, state,
                                                       &state->num_domgroups,
                                                       &state->domgroups);
        if (!composite_is_ok(state->ctx)) return;

        ctx = wb_sid2domain_send(state, state->service,
                                 state->service->primary_sid);
        composite_continue(state->ctx, ctx, usersids_recv_domain, state);
}

static void usersids_recv_domain(struct composite_context *ctx)
{
        struct cmd_usersids_state *state =
                talloc_get_type(ctx->async.private_data,
                                struct cmd_usersids_state);
        struct tevent_req *subreq;
        struct wbsrv_domain *domain;
        uint32_t i;

        state->ctx->status = wb_sid2domain_recv(ctx, &domain);
        if (!composite_is_ok(state->ctx)) return;

        state->lsa_sids.num_sids = state->num_domgroups+1;
        state->lsa_sids.sids = talloc_array(state, struct lsa_SidPtr,
                                            state->lsa_sids.num_sids);
        if (composite_nomem(state->lsa_sids.sids, state->ctx)) return;

        state->lsa_sids.sids[0].sid = state->user_sid;
        for (i=0; i<state->num_domgroups; i++) {
                state->lsa_sids.sids[i+1].sid = state->domgroups[i];
        }

        state->rids.count = 0;
        state->rids.ids = NULL;

        state->r.in.domain_handle = &domain->libnet_ctx->samr.handle;
        state->r.in.sids = &state->lsa_sids;
        state->r.out.rids = &state->rids;

        subreq = dcerpc_samr_GetAliasMembership_r_send(state,
                                                       state->ctx->event_ctx,
                                                       domain->libnet_ctx->samr.pipe->binding_handle,
                                                       &state->r);
        if (composite_nomem(subreq, state->ctx)) return;
        tevent_req_set_callback(subreq, usersids_recv_aliases, state);
}

static void usersids_recv_aliases(struct tevent_req *subreq)
{
        struct cmd_usersids_state *state =
                tevent_req_callback_data(subreq,
                struct cmd_usersids_state);
        uint32_t i;

        state->ctx->status = dcerpc_samr_GetAliasMembership_r_recv(subreq, state);
        TALLOC_FREE(subreq);
        if (!composite_is_ok(state->ctx)) return;
        state->ctx->status = state->r.out.result;
        if (!composite_is_ok(state->ctx)) return;

        state->num_sids = 1 + state->num_domgroups + state->r.out.rids->count;
        state->sids = talloc_array(state, struct dom_sid *, state->num_sids);
        if (composite_nomem(state->sids, state->ctx)) return;

        state->sids[0] = talloc_steal(state->sids, state->user_sid);

        for (i=0; i<state->num_domgroups; i++) {
                state->sids[1+i] =
                        talloc_steal(state->sids, state->domgroups[i]);
        }

        for (i=0; i<state->r.out.rids->count; i++) {
                state->sids[1+state->num_domgroups+i] = dom_sid_add_rid(
                        state->sids, state->service->primary_sid,
                        state->r.out.rids->ids[i]);

                if (composite_nomem(state->sids[1+state->num_domgroups+i],
                                    state->ctx)) return;
        }

        composite_done(state->ctx);
}

NTSTATUS wb_cmd_usersids_recv(struct composite_context *ctx,
                              TALLOC_CTX *mem_ctx,
                              uint32_t *num_sids, struct dom_sid ***sids)
{
        NTSTATUS status = composite_wait(ctx);
        if (NT_STATUS_IS_OK(status)) {
                struct cmd_usersids_state *state =
                        talloc_get_type(ctx->private_data,
                                        struct cmd_usersids_state);
                *num_sids = state->num_sids;
                *sids = talloc_steal(mem_ctx, state->sids);
        }
        talloc_free(ctx);
        return status;
}

NTSTATUS wb_cmd_usersids(TALLOC_CTX *mem_ctx, struct wbsrv_service *service,
                         const struct dom_sid *sid,
                         uint32_t *num_sids, struct dom_sid ***sids)
{
        struct composite_context *c =
                wb_cmd_usersids_send(mem_ctx, service, sid);
        return wb_cmd_usersids_recv(c, mem_ctx, num_sids, sids);
}