Doug Anson / mbedTLSLibrary

mbed TLS library

Dependents:   HTTPClient-SSL WS_SERVER

include/polarssl/havege.h@0:137634ff4186, 2015-06-11 (annotated)

Committer:
ansond
Date:
Thu Jun 11 03:27:03 2015 +0000
Revision:
0:137634ff4186
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ansond 0:137634ff4186 1 /**
ansond 0:137634ff4186 2 * \file havege.h
ansond 0:137634ff4186 3 *
ansond 0:137634ff4186 4 * \brief HAVEGE: HArdware Volatile Entropy Gathering and Expansion
ansond 0:137634ff4186 5 *
ansond 0:137634ff4186 6 * Copyright (C) 2006-2013, ARM Limited, All Rights Reserved
ansond 0:137634ff4186 7 *
ansond 0:137634ff4186 8 * This file is part of mbed TLS (https://tls.mbed.org)
ansond 0:137634ff4186 9 *
ansond 0:137634ff4186 10 * This program is free software; you can redistribute it and/or modify
ansond 0:137634ff4186 11 * it under the terms of the GNU General Public License as published by
ansond 0:137634ff4186 12 * the Free Software Foundation; either version 2 of the License, or
ansond 0:137634ff4186 13 * (at your option) any later version.
ansond 0:137634ff4186 14 *
ansond 0:137634ff4186 15 * This program is distributed in the hope that it will be useful,
ansond 0:137634ff4186 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ansond 0:137634ff4186 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ansond 0:137634ff4186 18 * GNU General Public License for more details.
ansond 0:137634ff4186 19 *
ansond 0:137634ff4186 20 * You should have received a copy of the GNU General Public License along
ansond 0:137634ff4186 21 * with this program; if not, write to the Free Software Foundation, Inc.,
ansond 0:137634ff4186 22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
ansond 0:137634ff4186 23 */
ansond 0:137634ff4186 24 #ifndef POLARSSL_HAVEGE_H
ansond 0:137634ff4186 25 #define POLARSSL_HAVEGE_H
ansond 0:137634ff4186 26
ansond 0:137634ff4186 27 #include <stddef.h>
ansond 0:137634ff4186 28
ansond 0:137634ff4186 29 #define COLLECT_SIZE 1024
ansond 0:137634ff4186 30
ansond 0:137634ff4186 31 #ifdef __cplusplus
ansond 0:137634ff4186 32 extern "C" {
ansond 0:137634ff4186 33 #endif
ansond 0:137634ff4186 34
ansond 0:137634ff4186 35 /**
ansond 0:137634ff4186 36 * \brief HAVEGE state structure
ansond 0:137634ff4186 37 */
ansond 0:137634ff4186 38 typedef struct
ansond 0:137634ff4186 39 {
ansond 0:137634ff4186 40 int PT1, PT2, offset[2];
ansond 0:137634ff4186 41 int pool[COLLECT_SIZE];
ansond 0:137634ff4186 42 int WALK[8192];
ansond 0:137634ff4186 43 }
ansond 0:137634ff4186 44 havege_state;
ansond 0:137634ff4186 45
ansond 0:137634ff4186 46 /**
ansond 0:137634ff4186 47 * \brief HAVEGE initialization
ansond 0:137634ff4186 48 *
ansond 0:137634ff4186 49 * \param hs HAVEGE state to be initialized
ansond 0:137634ff4186 50 */
ansond 0:137634ff4186 51 void havege_init( havege_state *hs );
ansond 0:137634ff4186 52
ansond 0:137634ff4186 53 /**
ansond 0:137634ff4186 54 * \brief Clear HAVEGE state
ansond 0:137634ff4186 55 *
ansond 0:137634ff4186 56 * \param hs HAVEGE state to be cleared
ansond 0:137634ff4186 57 */
ansond 0:137634ff4186 58 void havege_free( havege_state *hs );
ansond 0:137634ff4186 59
ansond 0:137634ff4186 60 /**
ansond 0:137634ff4186 61 * \brief HAVEGE rand function
ansond 0:137634ff4186 62 *
ansond 0:137634ff4186 63 * \param p_rng A HAVEGE state
ansond 0:137634ff4186 64 * \param output Buffer to fill
ansond 0:137634ff4186 65 * \param len Length of buffer
ansond 0:137634ff4186 66 *
ansond 0:137634ff4186 67 * \return 0
ansond 0:137634ff4186 68 */
ansond 0:137634ff4186 69 int havege_random( void *p_rng, unsigned char *output, size_t len );
ansond 0:137634ff4186 70
ansond 0:137634ff4186 71 #ifdef __cplusplus
ansond 0:137634ff4186 72 }
ansond 0:137634ff4186 73 #endif
ansond 0:137634ff4186 74
ansond 0:137634ff4186 75 #endif /* havege.h */
ansond 0:137634ff4186 76