rngd.h

   1 /*
   2  * rngd.h -- rngd globals
   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., 51 Franklin Street, Suite 500, Boston, MA  02110-1335  USA
  19  */
  20
  21 #ifndef RNGD__H
  22 #define RNGD__H
  23
  24 #define _GNU_SOURCE
  25
  26 #include "rng-tools-config.h"
  27
  28 #include <unistd.h>
  29 #include <stdint.h>
  30 #include <stdbool.h>
  31 #include <stdio.h>
  32 #include <syslog.h>
  33
  34 #include "fips.h"
  35
  36 enum {
  37         MAX_RNG_FAILURES                = 25,
  38         RNG_OK_CREDIT                   = 1000, /* ~1:1250 false positives */
  39 };
  40
  41 /* Command line arguments and processing */
  42 struct arguments {
  43         char *random_name;
  44         char *pid_file;
  45
  46         int random_step;
  47         int fill_watermark;
  48
  49         bool quiet;
  50         bool verbose;
  51         bool daemon;
  52         bool enable_drng;
  53         bool enable_tpm;
  54 };
  55 extern struct arguments *arguments;
  56
  57 /* structures to store rng information */
  58 struct rng {
  59         char *rng_name;
  60         int rng_fd;
  61         bool disabled;
  62         int failures;
  63         int success;
  64
  65         int (*xread) (void *buf, size_t size, struct rng *ent_src);
  66         fips_ctx_t *fipsctx;
  67
  68         struct rng *next;
  69 };
  70
  71 /* Background/daemon mode */
  72 extern bool am_daemon;                  /* True if we went daemon */
  73
  74
  75 /*
  76  * Routines and macros
  77  */
  78 #define message(priority,fmt,args...) do { \
  79         if (am_daemon) { \
  80                 syslog((priority), fmt, ##args); \
  81         } else { \
  82                 fprintf(stderr, fmt, ##args); \
  83                 fprintf(stderr, "\n"); \
  84         } \
  85 } while (0)
  86
  87 extern void src_list_add(struct rng *ent_src);
  88 extern int write_pid_file(const char *pid_fn);
  89 #endif /* RNGD__H */
  90