mirror of
https://github.com/Mbed-TLS/mbedtls.git
synced 2025-10-28 23:14:56 +03:00
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/**
|
|
* \file havege.h
|
|
*
|
|
* \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
|
|
*/
|
|
/*
|
|
* Copyright The Mbed TLS Contributors
|
|
* 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.
|
|
*/
|
|
#ifndef MBEDTLS_HAVEGE_H
|
|
#define MBEDTLS_HAVEGE_H
|
|
|
|
#if !defined(MBEDTLS_CONFIG_FILE)
|
|
#include "mbedtls/config.h"
|
|
#else
|
|
#include MBEDTLS_CONFIG_FILE
|
|
#endif
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#define MBEDTLS_HAVEGE_COLLECT_SIZE 1024
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* \brief HAVEGE state structure
|
|
*/
|
|
typedef struct mbedtls_havege_state {
|
|
uint32_t PT1, PT2, offset[2];
|
|
uint32_t pool[MBEDTLS_HAVEGE_COLLECT_SIZE];
|
|
uint32_t WALK[8192];
|
|
}
|
|
mbedtls_havege_state;
|
|
|
|
/**
|
|
* \brief HAVEGE initialization
|
|
*
|
|
* \param hs HAVEGE state to be initialized
|
|
*/
|
|
void mbedtls_havege_init(mbedtls_havege_state *hs);
|
|
|
|
/**
|
|
* \brief Clear HAVEGE state
|
|
*
|
|
* \param hs HAVEGE state to be cleared
|
|
*/
|
|
void mbedtls_havege_free(mbedtls_havege_state *hs);
|
|
|
|
/**
|
|
* \brief HAVEGE rand function
|
|
*
|
|
* \param p_rng A HAVEGE state
|
|
* \param output Buffer to fill
|
|
* \param len Length of buffer
|
|
*
|
|
* \return 0
|
|
*/
|
|
int mbedtls_havege_random(void *p_rng, unsigned char *output, size_t len);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* havege.h */
|