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Diff: include/mbedtls/havege.h
- Revision:
- 0:cdf462088d13
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/include/mbedtls/havege.h Thu Jan 05 00:18:44 2017 +0000 @@ -0,0 +1,74 @@ +/** + * \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 + +#include <stddef.h> + +#define MBEDTLS_HAVEGE_COLLECT_SIZE 1024 + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * \brief HAVEGE state structure + */ +typedef struct +{ + 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 */