entropy_poll.h

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/*
 *  Copyright (C) 2006-2016, ARM Limited, All Rights Reserved
 *  SPDX-License-Identifier: Apache-2.0
 *
 *  Licensed under the Apache License, Version 2.0 (the "License"); you may
 *  not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *  This file is part of mbed TLS (https://tls.mbed.org)
 */
#ifndef MBEDTLS_ENTROPY_POLL_H
#define MBEDTLS_ENTROPY_POLL_H

#if !defined(MBEDTLS_CONFIG_FILE)
#include "mbedtls/config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif

#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Default thresholds for built-in sources, in bytes
 */
#define MBEDTLS_ENTROPY_MIN_PLATFORM     32     
#define MBEDTLS_ENTROPY_MIN_HAVEGE       32     
#define MBEDTLS_ENTROPY_MIN_HARDCLOCK     4     
#if !defined(MBEDTLS_ENTROPY_MIN_HARDWARE)
#define MBEDTLS_ENTROPY_MIN_HARDWARE     32     
#endif

#if defined(MBEDTLS_TEST_NULL_ENTROPY)
    int mbedtls_null_entropy_poll( void *data,
                                unsigned char *output, size_t len, size_t *olen );
#endif

#if !defined(MBEDTLS_NO_PLATFORM_ENTROPY)

int mbedtls_platform_entropy_poll( void *data,
                           unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_HAVEGE_C)

int mbedtls_havege_poll( void *data,
                 unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_TIMING_C)

int mbedtls_hardclock_poll( void *data,
                    unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_ENTROPY_HARDWARE_ALT)

int mbedtls_hardware_poll( void *data,
                           unsigned char *output, size_t len, size_t *olen );
#endif

#if defined(MBEDTLS_ENTROPY_NV_SEED)

int mbedtls_nv_seed_poll( void *data,
                          unsigned char *output, size_t len, size_t *olen );
#endif

#ifdef __cplusplus
}
#endif

#endif /* entropy_poll.h */