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/**
* \file entropy_poll.h
*
* \brief Platform-specific and custom entropy polling functions
*/
/*
* Copyright The Mbed TLS Contributors
* SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
*/
#ifndef MBEDTLS_ENTROPY_POLL_H
#define MBEDTLS_ENTROPY_POLL_H
#include "mbedtls/build_info.h"
#include <stddef.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Default thresholds for built-in sources, in bytes
*/
#define MBEDTLS_ENTROPY_MIN_PLATFORM 32 /**< Minimum for platform source */
#if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
#define MBEDTLS_ENTROPY_MIN_HARDWARE 32 /**< Minimum for the hardware source */
#endif
#if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)
/**
* \brief Platform-specific entropy poll callback
*/
int mbedtls_platform_entropy_poll(void *data,
unsigned char *output, size_t len, size_t *olen);
#endif
#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)
/**
* \brief Entropy poll callback for a hardware source
*
* \warning This is not provided by Mbed TLS!
* See \c MBEDTLS_ENTROPY_HARDWARE_ALT in mbedtls_config.h.
*
* \note This must accept NULL as its first argument.
*/
int mbedtls_hardware_poll(void *data,
unsigned char *output, size_t len, size_t *olen);
#endif
#if defined(MBEDTLS_ENTROPY_NV_SEED)
/**
* \brief Entropy poll callback for a non-volatile seed file
*
* \note This must accept NULL as its first argument.
*/
int mbedtls_nv_seed_poll(void *data,
unsigned char *output, size_t len, size_t *olen);
#endif
#ifdef __cplusplus
}
#endif
#endif /* entropy_poll.h */
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