include/tropicssl/havege.h

   1 /**
   2  * \file havege.h
   3  *
   4  *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
   5  *
   6  *  Copyright (C) 2009  Paul Bakker <polarssl_maintainer at polarssl dot org>
   7  *
   8  *  All rights reserved.
   9  *
  10  *  Redistribution and use in source and binary forms, with or without
  11  *  modification, are permitted provided that the following conditions
  12  *  are met:
  13  *
  14  *    * Redistributions of source code must retain the above copyright
  15  *      notice, this list of conditions and the following disclaimer.
  16  *    * Redistributions in binary form must reproduce the above copyright
  17  *      notice, this list of conditions and the following disclaimer in the
  18  *      documentation and/or other materials provided with the distribution.
  19  *    * Neither the names of PolarSSL or XySSL nor the names of its contributors
  20  *      may be used to endorse or promote products derived from this software
  21  *      without specific prior written permission.
  22  *
  23  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  24  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  25  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  26  *  FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  27  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  28  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  29  *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  30  *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  31  *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  32  *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  33  *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  34  */
  35 #ifndef TROPICSSL_HAVEGE_H
  36 #define TROPICSSL_HAVEGE_H
  37
  38 #define COLLECT_SIZE 1024
  39
  40 /**
  41  * \brief          HAVEGE state structure
  42  */
  43 typedef struct {
  44         int PT1, PT2, offset[2];
  45         int pool[COLLECT_SIZE];
  46         int WALK[8192];
  47 } havege_state;
  48
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52
  53         /**
  54          * \brief          HAVEGE initialization
  55          *
  56          * \param hs       HAVEGE state to be initialized
  57          */
  58         void havege_init(havege_state * hs);
  59
  60         /**
  61          * \brief          HAVEGE rand function
  62          *
  63          * \param rng_st   points to an HAVEGE state
  64          *
  65          * \return         A random int
  66          */
  67         int havege_rand(void *p_rng);
  68
  69 #ifdef __cplusplus
  70 }
  71 #endif
  72 #endif                          /* havege.h */