source: branches/samba-3.5.x/source4/winbind/wb_sid2uid.c

/*
   Unix SMB/CIFS implementation.

   Map a SID to a uid

   Copyright (C) 2007-2008 Kai Blin

   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 "winbind/wb_helper.h"
#include "libcli/security/security.h"
#include "winbind/idmap.h"

struct sid2uid_state {
        struct composite_context *ctx;
        struct wbsrv_service *service;
        uid_t uid;
};

static void sid2uid_recv_uid(struct composite_context *ctx);

struct composite_context *wb_sid2uid_send(TALLOC_CTX *mem_ctx,
                struct wbsrv_service *service, const struct dom_sid *sid)
{
        struct composite_context *result, *ctx;
        struct sid2uid_state *state;
        struct id_mapping *ids;

        DEBUG(5, ("wb_sid2uid_send called\n"));

        result = composite_create(mem_ctx, service->task->event_ctx);
        if (!result) return NULL;

        state = talloc(result, struct sid2uid_state);
        if (composite_nomem(state, result)) return result;

        state->ctx = result;
        result->private_data = state;
        state->service = service;

        ids = talloc(result, struct id_mapping);
        if (composite_nomem(ids, result)) return result;

        ids->sid = dom_sid_dup(result, sid);
        if (composite_nomem(ids->sid, result)) return result;

        ctx = wb_sids2xids_send(result, service, 1, ids);
        if (composite_nomem(ctx, result)) return result;

        composite_continue(result, ctx, sid2uid_recv_uid, state);
        return result;
}

static void sid2uid_recv_uid(struct composite_context *ctx)
{
        struct sid2uid_state *state = talloc_get_type(ctx->async.private_data,
                                                      struct sid2uid_state);

        struct id_mapping *ids = NULL;

        state->ctx->status = wb_sids2xids_recv(ctx, &ids);
        if (!composite_is_ok(state->ctx)) return;

        if (!NT_STATUS_IS_OK(ids->status)) {
                composite_error(state->ctx, ids->status);
                return;
        }

        if (ids->unixid->type == ID_TYPE_BOTH ||
            ids->unixid->type == ID_TYPE_UID) {
                state->uid = ids->unixid->id;
                composite_done(state->ctx);
        } else {
                composite_error(state->ctx, NT_STATUS_INVALID_SID);
        }
}

NTSTATUS wb_sid2uid_recv(struct composite_context *ctx, uid_t *uid)
{
        NTSTATUS status = composite_wait(ctx);

        DEBUG(5, ("wb_sid2uid_recv called\n"));

        if (NT_STATUS_IS_OK(status)) {
                struct sid2uid_state *state =
                        talloc_get_type(ctx->private_data,
                                struct sid2uid_state);
                *uid = state->uid;
        }
        talloc_free(ctx);
        return status;
}