118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/** @file
|
|
* @brief mbed TLS initialization
|
|
*
|
|
* Initialize the mbed TLS library like setup the heap etc.
|
|
*/
|
|
|
|
/*
|
|
* Copyright (c) 2017 Intel Corporation
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <zephyr/init.h>
|
|
#include <zephyr/app_memory/app_memdomain.h>
|
|
#include <zephyr/drivers/entropy.h>
|
|
#include <zephyr/random/random.h>
|
|
#include <mbedtls/entropy.h>
|
|
#include <mbedtls/platform_time.h>
|
|
|
|
|
|
#include <mbedtls/debug.h>
|
|
|
|
#if defined(CONFIG_MBEDTLS)
|
|
#if !defined(CONFIG_MBEDTLS_CFG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include CONFIG_MBEDTLS_CFG_FILE
|
|
#endif /* CONFIG_MBEDTLS_CFG_FILE */
|
|
#endif
|
|
|
|
#if defined(CONFIG_MBEDTLS_ENABLE_HEAP) && \
|
|
defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
|
|
#include <mbedtls/memory_buffer_alloc.h>
|
|
|
|
#if !defined(CONFIG_MBEDTLS_HEAP_SIZE)
|
|
#error "Please set heap size to be used. Set value to CONFIG_MBEDTLS_HEAP_SIZE \
|
|
option."
|
|
#endif
|
|
|
|
static unsigned char _mbedtls_heap[CONFIG_MBEDTLS_HEAP_SIZE];
|
|
|
|
static void init_heap(void)
|
|
{
|
|
mbedtls_memory_buffer_alloc_init(_mbedtls_heap, sizeof(_mbedtls_heap));
|
|
}
|
|
#else
|
|
#define init_heap(...)
|
|
#endif /* CONFIG_MBEDTLS_ENABLE_HEAP && MBEDTLS_MEMORY_BUFFER_ALLOC_C */
|
|
|
|
#if defined(CONFIG_MBEDTLS_ZEPHYR_ENTROPY)
|
|
static const struct device *const entropy_dev =
|
|
DEVICE_DT_GET_OR_NULL(DT_CHOSEN(zephyr_entropy));
|
|
|
|
int mbedtls_hardware_poll(void *data, unsigned char *output, size_t len,
|
|
size_t *olen)
|
|
{
|
|
int ret;
|
|
uint16_t request_len = len > UINT16_MAX ? UINT16_MAX : len;
|
|
|
|
ARG_UNUSED(data);
|
|
|
|
if (output == NULL || olen == NULL || len == 0) {
|
|
return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
|
|
}
|
|
|
|
if (!IS_ENABLED(CONFIG_ENTROPY_HAS_DRIVER)) {
|
|
sys_rand_get(output, len);
|
|
*olen = len;
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (!device_is_ready(entropy_dev)) {
|
|
return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
|
|
}
|
|
|
|
ret = entropy_get_entropy(entropy_dev, (uint8_t *)output, request_len);
|
|
if (ret < 0) {
|
|
return MBEDTLS_ERR_ENTROPY_SOURCE_FAILED;
|
|
}
|
|
|
|
*olen = request_len;
|
|
|
|
return 0;
|
|
}
|
|
#endif /* CONFIG_MBEDTLS_ZEPHYR_ENTROPY */
|
|
|
|
static int _mbedtls_init(void)
|
|
{
|
|
|
|
init_heap();
|
|
|
|
#if defined(CONFIG_MBEDTLS_DEBUG_LEVEL)
|
|
mbedtls_debug_set_threshold(CONFIG_MBEDTLS_DEBUG_LEVEL);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined(CONFIG_MBEDTLS_INIT)
|
|
SYS_INIT(_mbedtls_init, POST_KERNEL, 0);
|
|
#endif
|
|
|
|
/* if CONFIG_MBEDTLS_INIT is not defined then this function
|
|
* should be called by the platform before any mbedtls functionality
|
|
* is used
|
|
*/
|
|
int mbedtls_init(void)
|
|
{
|
|
return _mbedtls_init();
|
|
}
|
|
|
|
/* TLS 1.3 ticket lifetime needs a timing interface */
|
|
mbedtls_ms_time_t mbedtls_ms_time(void)
|
|
{
|
|
return (mbedtls_ms_time_t)k_uptime_get();
|
|
}
|