source: vendor/current/source3/winbindd/wb_getpwsid.c

/*
   Unix SMB/CIFS implementation.
   async getpwsid
   Copyright (C) Volker Lendecke 2009

   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 "winbindd.h"
#include "librpc/gen_ndr/ndr_winbind_c.h"
#include "../libcli/security/security.h"

struct wb_getpwsid_state {
        struct tevent_context *ev;
        struct dom_sid sid;
        struct wbint_userinfo *userinfo;
        struct winbindd_pw *pw;
};

static void wb_getpwsid_queryuser_done(struct tevent_req *subreq);
static void wb_getpwsid_lookupsid_done(struct tevent_req *subreq);
static void wb_getpwsid_done(struct tevent_req *subreq);

struct tevent_req *wb_getpwsid_send(TALLOC_CTX *mem_ctx,
                                    struct tevent_context *ev,
                                    const struct dom_sid *user_sid,
                                    struct winbindd_pw *pw)
{
        struct tevent_req *req, *subreq;
        struct wb_getpwsid_state *state;

        req = tevent_req_create(mem_ctx, &state, struct wb_getpwsid_state);
        if (req == NULL) {
                return NULL;
        }
        sid_copy(&state->sid, user_sid);
        state->ev = ev;
        state->pw = pw;

        subreq = wb_queryuser_send(state, ev, &state->sid);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, wb_getpwsid_queryuser_done, req);
        return req;
}

static void wb_getpwsid_queryuser_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct wb_getpwsid_state *state = tevent_req_data(
                req, struct wb_getpwsid_state);
        NTSTATUS status;

        status = wb_queryuser_recv(subreq, state, &state->userinfo);
        TALLOC_FREE(subreq);
        if (NT_STATUS_IS_OK(status)
            && (state->userinfo->acct_name != NULL)
            && (state->userinfo->acct_name[0] != '\0'))
        {
                /*
                 * QueryUser got us a name, let's go directly to the
                 * fill_pwent step
                 */
                subreq = wb_fill_pwent_send(state, state->ev, state->userinfo,
                                            state->pw);
                if (tevent_req_nomem(subreq, req)) {
                        return;
                }
                tevent_req_set_callback(subreq, wb_getpwsid_done, req);
                return;
        }

        /*
         * Either query_user did not succeed, or it
         * succeeded but did not return an acct_name.
         * (TODO: Can this happen at all???)
         * ==> Try lsa_lookupsids.
         */
        if (state->userinfo == NULL) {
                state->userinfo = talloc_zero(state, struct wbint_userinfo);
                if (tevent_req_nomem(state->userinfo, req)) {
                        return;
                }

                /* a successful query_user call would have filled these */
                sid_copy(&state->userinfo->user_sid, &state->sid);
                state->userinfo->homedir = NULL;
                state->userinfo->shell = NULL;
                state->userinfo->primary_gid = (gid_t)-1;
        }

        subreq = wb_lookupsid_send(state, state->ev, &state->sid);
        if (tevent_req_nomem(subreq, req)) {
                return;
        }
        tevent_req_set_callback(subreq, wb_getpwsid_lookupsid_done, req);
}

static void wb_getpwsid_lookupsid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct wb_getpwsid_state *state = tevent_req_data(
                req, struct wb_getpwsid_state);
        NTSTATUS status;
        enum lsa_SidType type;
        const char *domain;

        status = wb_lookupsid_recv(subreq, state->userinfo, &type, &domain,
                                   &state->userinfo->acct_name);
        TALLOC_FREE(subreq);
        if (tevent_req_nterror(req, status)) {
                return;
        }

        switch (type) {
        case SID_NAME_USER:
        case SID_NAME_COMPUTER:
                /*
                 * user case: we only need the account name from lookup_sids
                 */
                break;
        case SID_NAME_DOM_GRP:
        case SID_NAME_ALIAS:
        case SID_NAME_WKN_GRP:
                /*
                 * also treat group-type SIDs (they might map to ID_TYPE_BOTH)
                 */
                sid_copy(&state->userinfo->group_sid, &state->sid);
                break;
        default:
                tevent_req_nterror(req, NT_STATUS_NO_SUCH_USER);
                return;
        }

        subreq = wb_fill_pwent_send(state, state->ev, state->userinfo,
                                    state->pw);
        if (tevent_req_nomem(subreq, req)) {
                return;
        }
        tevent_req_set_callback(subreq, wb_getpwsid_done, req);
}

static void wb_getpwsid_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        NTSTATUS status;

        status = wb_fill_pwent_recv(subreq);
        if (tevent_req_nterror(req, status)) {
                return;
        }
        tevent_req_done(req);
}

NTSTATUS wb_getpwsid_recv(struct tevent_req *req)
{
        return tevent_req_simple_recv_ntstatus(req);
}