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/*
* uuid.c
* ------
* UUID support for keystore database.
*
* Copyright (c) 2016, NORDUnet A/S All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the NORDUnet nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT
* HOLDER OR CONTRIBUTORS 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 <assert.h>
#include "hal.h"
#include "hal_internal.h"
hal_error_t hal_uuid_gen(hal_uuid_t *uuid)
{
hal_error_t err;
if (uuid == NULL)
return HAL_ERROR_BAD_ARGUMENTS;
/*
* Generate a version 4 UUID as specified in RFC 4122.
* This is basically a 122-bit random number.
*/
if ((err = hal_rpc_get_random(uuid->uuid, sizeof(uuid->uuid))) != HAL_OK)
return err;
/*
* Set high order bits of clock_seq_hi_and_reserved and
* time_hi_and_version fields to magic values as specified by RFC
* 4122 section 4.4.
*
* Not recommended reading if you've eaten recently.
*/
uuid->uuid[6] &= 0x0f;
uuid->uuid[6] |= 0x40;
uuid->uuid[8] &= 0x3f;
uuid->uuid[8] |= 0x80;
return HAL_OK;
}
/*
* Local variables:
* indent-tabs-mode: nil
* End:
*/
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