Mix/Src/rndseed.c

/* Mixmaster version 3  --  (C) 1999 Anonymizer Inc.

   Mixmaster may be redistributed and modified under certain conditions.
   This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
   ANY KIND, either express or implied. See the file COPYRIGHT for
   details.

   Get randomness from device or user
   $Id: rndseed.c,v 1.3 2002/09/07 11:16:37 disastry Exp $ */


#include "mix3.h"
#include <assert.h>
#include <time.h>
#include <fcntl.h>
#include <time.h>
#include <stdlib.h>
#ifdef POSIX
#include <unistd.h>
#include <termios.h>
#else
#include <io.h>
#include <process.h>
#endif
#if defined(WIN32) || defined(MSDOS)
#include <conio.h>
#endif
#ifdef WIN32
#include <windows.h>
#endif

#define NEEDED 128

#ifndef O_NDELAY
#define O_NDELAY 0
#endif

int kbd_noecho(void)
{
#ifdef HAVE_TERMIOS
  int fd;
  struct termios attr;

  setbuf(stdin, NULL);
  fd = fileno(stdin);
  if (tcgetattr(fd, &attr) != 0)
    return (-1);
  attr.c_lflag &= ~(ECHO | ICANON);
  if (tcsetattr(fd, TCSAFLUSH, &attr) != 0)
    return (-1);
#endif
  return (0);
}

int kbd_echo(void)
{
#ifdef HAVE_TERMIOS
  int fd;
  struct termios attr;

  setvbuf(stdin, NULL, _IOLBF, BUFSIZ);
  fd = fileno(stdin);
  if (tcgetattr(fd, &attr) != 0)
    return (-1);
  attr.c_lflag |= ECHO | ICANON;
  if (tcsetattr(fd, TCSAFLUSH, &attr) != 0)
    return (-1);
#endif
  return (0);
}

void rnd_error(void)
{
  errlog(ERRORMSG,
         "Random number generator not initialized. Aborting.\n\
Run the program interactively to seed the generator.\n");
  exit(3);
}

/* get randomness from system or user. If the application has promised that
   it will seed the RNG later, we do not ask for user input */

int rnd_seed(void)
{
  int fd = -1;
  byte b[512], c = 0;
  int bytes = 0;

#ifdef DEV_RANDOM
  fd = open(DEV_RANDOM, O_RDONLY | O_NDELAY);
#endif
  if (fd == -1) {
#if 1
    if (rnd_state == RND_WILLSEED)
      return(-1);
    if (!isatty(fileno(stdin)))
      rnd_error();
#else
#error "should initialize the prng from system ressources"
#endif
    fprintf(stderr, "Please enter some random characters.\n");
    kbd_noecho();
    while (bytes < NEEDED) {
      fprintf(stderr, "  %d     \r", NEEDED - bytes);
#ifdef HAVE_GETKEY
      if (kbhit(), *b = getkey())
#else
      if (read(fileno(stdin), b, 1) > 0)
#endif
        {
          rnd_add(b, 1);
          rnd_time();
          if (*b != c)
            bytes++;
          c = *b;
        }
    }
    fprintf(stderr, "Thanks.\n");
#ifdef WIN32
    Sleep(1000);
#else
    sleep(1);
#endif
    kbd_echo();
  }
#ifdef DEV_RANDOM
  else {
    bytes = read(fd, b, sizeof(b));
    if (bytes > 0) {
      rnd_add(b, bytes);
    } else {
      bytes = 0;
    }
    close(fd);
    if (bytes < NEEDED) {
      fd = open(DEV_RANDOM, O_RDONLY);  /* re-open in blocking mode */
      if (isatty(fileno(stdin))) {
        fprintf(stderr,
                "Please move the mouse, enter random characters, etc.\n");
        kbd_noecho();
      }
      while (bytes < NEEDED) {
        if (isatty(fileno(stdin)))
          fprintf(stderr, "  %d     \r", NEEDED - bytes);
        if (read(fd, b, 1) > 0) {
          rnd_add(b, 1);
          bytes++;
        }
      }
      if (isatty(fileno(stdin))) {
        fprintf(stderr, "Thanks.\n");
#ifdef WIN32
        Sleep(1000);
#else
        sleep(1);
#endif
        kbd_echo();
      }
      close(fd);
    }
  }
#endif
  rnd_state = RND_SEEDED;
  return (0);
}
1	rabbi	1	/* Mixmaster version 3 -- (C) 1999 Anonymizer Inc.
2
3			Mixmaster may be redistributed and modified under certain conditions.
4			This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
5			ANY KIND, either express or implied. See the file COPYRIGHT for
6			details.
7
8			Get randomness from device or user
9	disastry	226	$Id: rndseed.c,v 1.3 2002/09/07 11:16:37 disastry Exp $ */
10	rabbi	1
11
12			#include "mix3.h"
13			#include <assert.h>
14			#include <time.h>
15			#include <fcntl.h>
16			#include <time.h>
17	weaselp	120	#include <stdlib.h>
18	rabbi	1	#ifdef POSIX
19			#include <unistd.h>
20			#include <termios.h>
21			#else
22			#include <io.h>
23			#include <process.h>
24			#endif
25			#if defined(WIN32) \|\| defined(MSDOS)
26			#include <conio.h>
27			#endif
28			#ifdef WIN32
29			#include <windows.h>
30			#endif
31
32			#define NEEDED 128
33
34			#ifndef O_NDELAY
35			#define O_NDELAY 0
36			#endif
37
38			int kbd_noecho(void)
39			{
40			#ifdef HAVE_TERMIOS
41			int fd;
42			struct termios attr;
43
44			setbuf(stdin, NULL);
45			fd = fileno(stdin);
46			if (tcgetattr(fd, &attr) != 0)
47			return (-1);
48			attr.c_lflag &= ~(ECHO \| ICANON);
49			if (tcsetattr(fd, TCSAFLUSH, &attr) != 0)
50			return (-1);
51			#endif
52			return (0);
53			}
54
55			int kbd_echo(void)
56			{
57			#ifdef HAVE_TERMIOS
58			int fd;
59			struct termios attr;
60
61			setvbuf(stdin, NULL, _IOLBF, BUFSIZ);
62			fd = fileno(stdin);
63			if (tcgetattr(fd, &attr) != 0)
64			return (-1);
65			attr.c_lflag \|= ECHO \| ICANON;
66			if (tcsetattr(fd, TCSAFLUSH, &attr) != 0)
67			return (-1);
68			#endif
69			return (0);
70			}
71
72			void rnd_error(void)
73			{
74			errlog(ERRORMSG,
75			"Random number generator not initialized. Aborting.\n\
76			Run the program interactively to seed the generator.\n");
77			exit(3);
78			}
79
80			/* get randomness from system or user. If the application has promised that
81			it will seed the RNG later, we do not ask for user input */
82
83			int rnd_seed(void)
84			{
85			int fd = -1;
86			byte b[512], c = 0;
87			int bytes = 0;
88
89			#ifdef DEV_RANDOM
90			fd = open(DEV_RANDOM, O_RDONLY \| O_NDELAY);
91			#endif
92			if (fd == -1) {
93			#if 1
94			if (rnd_state == RND_WILLSEED)
95			return(-1);
96			if (!isatty(fileno(stdin)))
97			rnd_error();
98			#else
99			#error "should initialize the prng from system ressources"
100			#endif
101			fprintf(stderr, "Please enter some random characters.\n");
102			kbd_noecho();
103			while (bytes < NEEDED) {
104			fprintf(stderr, " %d \r", NEEDED - bytes);
105			#ifdef HAVE_GETKEY
106			if (kbhit(), *b = getkey())
107			#else
108			if (read(fileno(stdin), b, 1) > 0)
109			#endif
110			{
111			rnd_add(b, 1);
112			rnd_time();
113			if (*b != c)
114			bytes++;
115			c = *b;
116			}
117			}
118			fprintf(stderr, "Thanks.\n");
119			#ifdef WIN32
120			Sleep(1000);
121			#else
122			sleep(1);
123			#endif
124			kbd_echo();
125			}
126			#ifdef DEV_RANDOM
127			else {
128			bytes = read(fd, b, sizeof(b));
129	weaselp	120	if (bytes > 0) {
130			rnd_add(b, bytes);
131			} else {
132			bytes = 0;
133			}
134	rabbi	1	close(fd);
135			if (bytes < NEEDED) {
136			fd = open(DEV_RANDOM, O_RDONLY); /* re-open in blocking mode */
137			if (isatty(fileno(stdin))) {
138			fprintf(stderr,
139			"Please move the mouse, enter random characters, etc.\n");
140			kbd_noecho();
141			}
142			while (bytes < NEEDED) {
143			if (isatty(fileno(stdin)))
144			fprintf(stderr, " %d \r", NEEDED - bytes);
145			if (read(fd, b, 1) > 0) {
146			rnd_add(b, 1);
147			bytes++;
148			}
149			}
150			if (isatty(fileno(stdin))) {
151			fprintf(stderr, "Thanks.\n");
152			#ifdef WIN32
153	disastry	226	Sleep(1000);
154	rabbi	1	#else
155			sleep(1);
156			#endif
157			kbd_echo();
158			}
159			close(fd);
160			}
161			}
162			#endif
163			rnd_state = RND_SEEDED;
164			return (0);
165			}