wsutil/sober128.h

   1 /** @file
   2    This file is derived from sober128 implementation in corosync
   3    cluster engine. corosync cluster engine borrows the implementation
   4    from LibTomCrypt.
   5
   6    The latest version of the original code can be found at
   7    http://www.libtom.net/LibTomCrypt/ according to which this code is in the
   8    Public Domain
   9 */
  10
  11 /* About LibTomCrypt:
  12  * ---------------------------------------------------------------------
  13  * LibTomCrypt, modular cryptographic library -- Tom St Denis
  14  *
  15  * LibTomCrypt is a library that provides various cryptographic
  16  * algorithms in a highly modular and flexible manner.
  17  *
  18  * The library is free for all purposes without any express
  19  * guarantee it works.
  20  *
  21  * Tom St Denis, tomstdenis@iahu.ca, http://www.libtom.net/LibTomCrypt/
  22  */
  23
  24 #ifndef _SOBER127_H
  25 #define _SOBER127_H
  26
  27 #include "ws_symbol_export.h"
  28
  29 typedef struct _sober128_prng {
  30     unsigned long      R[17],          /* Working storage for the shift register */
  31                  initR[17],      /* saved register contents */
  32                  konst,          /* key dependent constant */
  33                  sbuf;           /* partial word encryption buffer */
  34
  35     int          nbuf,           /* number of part-word stream bits buffered */
  36                  flag,           /* first add_entropy call or not? */
  37                  set;            /* did we call add_entropy to set key? */
  38
  39 } sober128_prng;
  40
  41 WS_DLL_PUBLIC
  42 int sober128_start(sober128_prng *prng);
  43 WS_DLL_PUBLIC
  44 int sober128_add_entropy(const unsigned char *buf, unsigned long len, sober128_prng *prng);
  45 WS_DLL_PUBLIC
  46 unsigned long sober128_read(unsigned char *buf, unsigned long len, sober128_prng *prng);
  47
  48 #endif  /* sober128.h */