Mix/Src/rndseed.c

/* Mixmaster version 3.0  --  (C) 1999 - 2006 Anonymizer Inc. and others.

   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
   $Id$ */


#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 /* end of POSIX */
#include <io.h>
#include <process.h>
#endif /* else if not POSIX */
#if defined(WIN32) || defined(MSDOS)
#include <conio.h>
#endif /* defined(WIN32) || defined(MSDOS) */
#ifdef WIN32
#include <windows.h>
#endif /* WIN32 */

#define NEEDED 128

#ifndef O_NDELAY
#define O_NDELAY 0
#endif /* not O_NDELAY */

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 /* HAVE_TERMIOS */
  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 /* HAVE_TERMIOS */
  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 /* DEV_RANDOM */
  if (fd == -1) {
#if 1
    if (rnd_state == RND_WILLSEED)
      return(-1);
    if (!isatty(fileno(stdin)))
      rnd_error();
#else /* end of 1 */
#error "should initialize the prng from system ressources"
#endif /* else if not 1 */
    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 /* end of HAVE_GETKEY */
      if (read(fileno(stdin), b, 1) > 0)
#endif /* else if not HAVE_GETKEY */
        {
          rnd_add(b, 1);
          rnd_time();
          if (*b != c)
            bytes++;
          c = *b;
        }
    }
    fprintf(stderr, "Thanks.\n");
    sleep(1);
    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");
        sleep(1);
        kbd_echo();
      }
      close(fd);
    }
  }
#endif /* DEV_RANDOM */
  rnd_state = RND_SEEDED;
  return (0);
}
1	rabbi	934	/* Mixmaster version 3.0 -- (C) 1999 - 2006 Anonymizer Inc. and others.
2	rabbi	1
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	weasel	647	$Id$ */
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	rabbi	262	#else /* end of POSIX */
22	rabbi	1	#include <io.h>
23			#include <process.h>
24	rabbi	262	#endif /* else if not POSIX */
25	rabbi	1	#if defined(WIN32) \|\| defined(MSDOS)
26			#include <conio.h>
27	rabbi	262	#endif /* defined(WIN32) \|\| defined(MSDOS) */
28	rabbi	1	#ifdef WIN32
29			#include <windows.h>
30	rabbi	262	#endif /* WIN32 */
31	rabbi	1
32			#define NEEDED 128
33
34			#ifndef O_NDELAY
35			#define O_NDELAY 0
36	rabbi	262	#endif /* not O_NDELAY */
37	rabbi	1
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	rabbi	262	#endif /* HAVE_TERMIOS */
52	rabbi	1	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	rabbi	262	#endif /* HAVE_TERMIOS */
69	rabbi	1	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	rabbi	262	#endif /* DEV_RANDOM */
92	rabbi	1	if (fd == -1) {
93			#if 1
94			if (rnd_state == RND_WILLSEED)
95			return(-1);
96			if (!isatty(fileno(stdin)))
97			rnd_error();
98	rabbi	262	#else /* end of 1 */
99	rabbi	1	#error "should initialize the prng from system ressources"
100	rabbi	262	#endif /* else if not 1 */
101	rabbi	1	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	rabbi	262	#else /* end of HAVE_GETKEY */
108	rabbi	1	if (read(fileno(stdin), b, 1) > 0)
109	rabbi	262	#endif /* else if not HAVE_GETKEY */
110	rabbi	1	{
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			sleep(1);
120			kbd_echo();
121			}
122			#ifdef DEV_RANDOM
123			else {
124			bytes = read(fd, b, sizeof(b));
125	weaselp	120	if (bytes > 0) {
126			rnd_add(b, bytes);
127			} else {
128			bytes = 0;
129			}
130	rabbi	1	close(fd);
131			if (bytes < NEEDED) {
132			fd = open(DEV_RANDOM, O_RDONLY); /* re-open in blocking mode */
133			if (isatty(fileno(stdin))) {
134			fprintf(stderr,
135			"Please move the mouse, enter random characters, etc.\n");
136			kbd_noecho();
137			}
138			while (bytes < NEEDED) {
139			if (isatty(fileno(stdin)))
140			fprintf(stderr, " %d \r", NEEDED - bytes);
141			if (read(fd, b, 1) > 0) {
142			rnd_add(b, 1);
143			bytes++;
144			}
145			}
146			if (isatty(fileno(stdin))) {
147			fprintf(stderr, "Thanks.\n");
148			sleep(1);
149			kbd_echo();
150			}
151			close(fd);
152			}
153			}
154	rabbi	262	#endif /* DEV_RANDOM */
155	rabbi	1	rnd_state = RND_SEEDED;
156			return (0);
157			}