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/*
* Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/opensslconf.h>
#include <openssl/rand.h>
#include "prov/rand_pool.h"
#include "crypto/rand.h"
#include "internal/cryptlib.h"
#include "prov/seeding.h"
#include <version.h>
#include <taskLib.h>
#if defined(OPENSSL_RAND_SEED_NONE)
/* none means none */
# undef OPENSSL_RAND_SEED_OS
#endif
#if defined(OPENSSL_RAND_SEED_OS)
# if _WRS_VXWORKS_MAJOR >= 7
# define RAND_SEED_VXRANDLIB
# else
# error "VxWorks <7 only support RAND_SEED_NONE"
# endif
#endif
#if defined(RAND_SEED_VXRANDLIB)
# include <randomNumGen.h>
#endif
/* Macro to convert two thirty two bit values into a sixty four bit one */
#define TWO32TO64(a, b) ((((uint64_t)(a)) << 32) + (b))
static uint64_t get_time_stamp(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_REALTIME, &ts) == 0)
return TWO32TO64(ts.tv_sec, ts.tv_nsec);
return time(NULL);
}
static uint64_t get_timer_bits(void)
{
uint64_t res = OPENSSL_rdtsc();
struct timespec ts;
if (res != 0)
return res;
if (clock_gettime(CLOCK_MONOTONIC, &ts) == 0)
return TWO32TO64(ts.tv_sec, ts.tv_nsec);
return time(NULL);
}
/*
* empty implementation
* vxworks does not need to init/cleanup or keep open the random lib
*/
int rand_pool_init(void)
{
return 1;
}
void rand_pool_cleanup(void)
{
}
void rand_pool_keep_random_devices_open(int keep)
{
}
int rand_pool_add_additional_data(RAND_POOL *pool)
{
struct {
CRYPTO_THREAD_ID tid;
uint64_t time;
} data;
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