mbedtls/include/mbedtls/havege.h
Andrzej Kurek c470b6b021 Merge development commit 8e76332 into development-psa
Additional changes to temporarily enable running tests:
ssl_srv.c and test_suite_ecdh use mbedtls_ecp_group_load instead of
mbedtls_ecdh_setup
test_suite_ctr_drbg uses mbedtls_ctr_drbg_update instead of 
mbedtls_ctr_drbg_update_ret
2019-01-31 08:20:20 -05:00

81 lines
1.9 KiB
C

/**
* \file havege.h
*
* \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
*/
/*
* 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_HAVEGE_H
#define MBEDTLS_HAVEGE_H
#if !defined(MBEDTLS_CONFIG_FILE)
#include "config.h"
#else
#include MBEDTLS_CONFIG_FILE
#endif
#include <stddef.h>
#define MBEDTLS_HAVEGE_COLLECT_SIZE 1024
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief HAVEGE state structure
*/
typedef struct mbedtls_havege_state
{
int PT1, PT2, offset[2];
int pool[MBEDTLS_HAVEGE_COLLECT_SIZE];
int 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 */