RIOT/sys/suit/conditions.c

/*
 * Copyright (C) 2019 Koen Zandberg
 *               2019 Inria
 *               2019 Kaspar Schleiser <kaspar@schleiser.de>
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */

/**
 * @ingroup     sys_suit
 * @{
 *
 * @file
 * @brief       SUIT condition initializers
 *
 * @author      Koen Zandberg <koen@bergzand.net>
 * @author      Kaspar Schleiser <kaspar@schleiser.de>
 * @}
 */

#include <string.h>

#include "suit/conditions.h"
#include "uuid.h"
#include "luid.h"

#define ENABLE_DEBUG 0
#include "debug.h"

#define SUIT_DEVID_BYTES 32

static suit_condition_params_t _conditions;

void suit_init_conditions(void)
{
    /* Generate UUID's following the instructions from
     * https://tools.ietf.org/html/draft-moran-suit-manifest-03#section-7.7.1
     */
    uuid_v5(&_conditions.vendor, &uuid_namespace_dns,
            (uint8_t *)SUIT_VENDOR_DOMAIN, strlen(SUIT_VENDOR_DOMAIN));

    uuid_v5(&_conditions.class, &_conditions.vendor, (uint8_t *)SUIT_CLASS_ID,
            strlen(SUIT_CLASS_ID));

    uint8_t devid[SUIT_DEVID_BYTES];
    /* Use luid_base to ensure an identical ID independent of previous luid
     * calls */
    luid_base(devid, SUIT_DEVID_BYTES);
    uuid_v5(&_conditions.device, &_conditions.vendor, devid, SUIT_DEVID_BYTES);
}

uuid_t *suit_get_vendor_id(void)
{
    return &_conditions.vendor;
}

uuid_t *suit_get_class_id(void)
{
    return &_conditions.class;
}

uuid_t *suit_get_device_id(void)
{
    return &_conditions.device;
}