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- /**
- * \file entropy_poll.h
- *
- * \brief Platform-specific and custom entropy polling functions
- *
- * Copyright (C) 2006-2015, 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 "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 /**< Minimum for platform source */
- #define MBEDTLS_ENTROPY_MIN_HAVEGE 32 /**< Minimum for HAVEGE */
- #define MBEDTLS_ENTROPY_MIN_HARDCLOCK 4 /**< Minimum for mbedtls_timing_hardclock() */
- #define MBEDTLS_ENTROPY_MIN_HARDWARE 32 /**< Minimum for the hardware source */
- #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_HAVEGE_C)
- /**
- * \brief HAVEGE based entropy poll callback
- *
- * Requires an HAVEGE state as its data pointer.
- */
- int mbedtls_havege_poll( void *data,
- unsigned char *output, size_t len, size_t *olen );
- #endif
- #if defined(MBEDTLS_TIMING_C)
- /**
- * \brief mbedtls_timing_hardclock-based entropy poll callback
- */
- int mbedtls_hardclock_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 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
- #ifdef __cplusplus
- }
- #endif
- #endif /* entropy_poll.h */
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