rngd_linux.h

   1 /*
   2  * rngd_linux.h -- Entropy sink for the Linux Kernel (/dev/random)
   3  *
   4  * Copyright (C) 2001 Philipp Rumpf
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #ifndef RNGD_LINUX__H
  22 #define RNGD_LINUX__H
  23
  24 #include "rng-tools-config.h"
  25
  26 #include <unistd.h>
  27 #include <stdint.h>
  28
  29 /* The default watermark level for this platform */
  30 extern int default_watermark(void);
  31
  32 /*
  33  * Initialize the interface to the Linux Kernel
  34  * entropy pool (through /dev/random)
  35  *
  36  * randomdev is the path to the random device
  37  */
  38 extern void init_kernel_rng(const char* randomdev);
  39
  40 /* Send entropy to the kernel */
  41 extern void random_add_entropy(void *buf, size_t size);
  42
  43 /* Sleep until the kernel is hungry for entropy */
  44 extern void random_sleep(void);
  45
  46 #endif /* RNGD_LINUX__H */
  47