/*      $NetBSD: file.c,v 1.3 2020/06/07 00:15:37 thorpej Exp $ */

/*-
 * Copyright (c) 2007 Iain Hibbert
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__RCSID("$NetBSD: file.c,v 1.3 2020/06/07 00:15:37 thorpej Exp $");

#include <sys/stat.h>
#include <prop/proplib.h>

#include <bluetooth.h>
#include <stdbool.h>
#include <string.h>

#include "btkey.h"

static const char *key_file = "/var/db/bthcid.keys";

/*
 * List keys file.
 */
bool
list_file(void)
{
        prop_dictionary_t db, dev;
        prop_object_iterator_t iter;
        prop_dictionary_keysym_t sym;
        prop_object_t dat;
        bdaddr_t bdaddr;
        bool rv = false;

        db = prop_dictionary_internalize_from_file(key_file);
        if (db == NULL)
                return false;

        dev = prop_dictionary_get(db, bt_ntoa(&laddr, NULL));
        if (prop_object_type(dev) != PROP_TYPE_DICTIONARY)
                goto done;

        iter = prop_dictionary_iterator(dev);
        if (iter == NULL)
                goto done;

        while ((sym = prop_object_iterator_next(iter)) != NULL) {
                if (bt_aton(prop_dictionary_keysym_value(sym), &bdaddr) == 0)
                        continue;
                if (bdaddr_any(&bdaddr))
                        continue;

                dat = prop_dictionary_get_keysym(dev, sym);
                if (prop_data_size(dat) != HCI_KEY_SIZE)
                        continue;

                printf("\n");
                print_addr("bdaddr", &bdaddr);
                print_key("file key", prop_data_value(dat));
        }

        prop_object_iterator_release(iter);
        rv = true;

done:
        prop_object_release(db);
        return rv;
}

/*
 * Read from keys file.
 */
bool
read_file(void)
{
        prop_dictionary_t db, dev;
        prop_object_t dat;
        bool rv = false;

        db = prop_dictionary_internalize_from_file(key_file);
        if (db == NULL)
                return false;

        dev = prop_dictionary_get(db, bt_ntoa(&laddr, NULL));
        if (prop_object_type(dev) != PROP_TYPE_DICTIONARY)
                goto done;

        dat = prop_dictionary_get(dev, bt_ntoa(&raddr, NULL));
        if (prop_data_size(dat) != HCI_KEY_SIZE)
                goto done;

        memcpy(key, prop_data_value(dat), HCI_KEY_SIZE);
        rv = true;

done:
        prop_object_release(db);
        return rv;
}

/*
 * Write to keys file.
 */
bool
write_file(void)
{
        prop_dictionary_t db, dev;
        prop_data_t dat;
        mode_t mode;
        bool rv = false;

        db = prop_dictionary_internalize_from_file(key_file);
        if (db == NULL) {
                db = prop_dictionary_create();
                if (db == NULL)
                        return false;
        }

        dev = prop_dictionary_get(db, bt_ntoa(&laddr, NULL));
        if (dev == NULL) {
                dev = prop_dictionary_create();
                if (dev == NULL)
                        goto done;

                rv = prop_dictionary_set(db, bt_ntoa(&laddr, NULL), dev);
                prop_object_release(dev);
                if (rv == false)
                        goto done;
        }

        dat = prop_data_create_nocopy(key, HCI_KEY_SIZE);
        if (dat == NULL)
                goto done;

        rv = prop_dictionary_set(dev, bt_ntoa(&raddr, NULL), dat);
        prop_object_release(dat);
        if (rv == false)
                goto done;

        mode = umask(S_IRWXG | S_IRWXO);
        rv = prop_dictionary_externalize_to_file(db, key_file);
        umask(mode);

done:
        prop_object_release(db);
        return rv;
}

/*
 * Clear from keys file.
 */
bool
clear_file(void)
{
        prop_dictionary_t db, dev;
        prop_data_t dat;
        mode_t mode;
        bool rv = false;

        db = prop_dictionary_internalize_from_file(key_file);
        if (db == NULL)
                return false;

        dev = prop_dictionary_get(db, bt_ntoa(&laddr, NULL));
        if (dev == NULL)
                goto done;

        dat = prop_dictionary_get(dev, bt_ntoa(&raddr, NULL));
        if (prop_data_size(dat) != HCI_KEY_SIZE)
                goto done;

        prop_dictionary_remove(dev, bt_ntoa(&raddr, NULL));

        mode = umask(S_IRWXG | S_IRWXO);
        rv = prop_dictionary_externalize_to_file(db, key_file);
        umask(mode);

done:
        prop_object_release(db);
        return rv;
}