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
   $Id$ */


#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");
#ifdef WIN32
    Sleep(1000);
#else /* end of WIN32 */
    sleep(1);
#endif /* else if not WIN32 */
    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 /* end of WIN32 */
        sleep(1);
#endif /* else if not WIN32 */
        kbd_echo();
      }
      close(fd);
    }
  }
#endif /* DEV_RANDOM */
  rnd_state = RND_SEEDED;
  return (0);
}
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	$Id$ */
10
11
12	#include "mix3.h"
13	#include <assert.h>
14	#include <time.h>
15	#include <fcntl.h>
16	#include <time.h>
17	#include <stdlib.h>
18	#ifdef POSIX
19	#include <unistd.h>
20	#include <termios.h>
21	#else /* end of POSIX */
22	#include <io.h>
23	#include <process.h>
24	#endif /* else if not POSIX */
25	#if defined(WIN32) \|\| defined(MSDOS)
26	#include <conio.h>
27	#endif /* defined(WIN32) \|\| defined(MSDOS) */
28	#ifdef WIN32
29	#include <windows.h>
30	#endif /* WIN32 */
31
32	#define NEEDED 128
33
34	#ifndef O_NDELAY
35	#define O_NDELAY 0
36	#endif /* not O_NDELAY */
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 /* HAVE_TERMIOS */
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 /* HAVE_TERMIOS */
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 /* DEV_RANDOM */
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 /* end of 1 */
99	#error "should initialize the prng from system ressources"
100	#endif /* else if not 1 */
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 /* end of HAVE_GETKEY */
108	if (read(fileno(stdin), b, 1) > 0)
109	#endif /* else if not HAVE_GETKEY */
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 /* end of WIN32 */
122	sleep(1);
123	#endif /* else if not WIN32 */
124	kbd_echo();
125	}
126	#ifdef DEV_RANDOM
127	else {
128	bytes = read(fd, b, sizeof(b));
129	if (bytes > 0) {
130	rnd_add(b, bytes);
131	} else {
132	bytes = 0;
133	}
134	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	Sleep(1000);
154	#else /* end of WIN32 */
155	sleep(1);
156	#endif /* else if not WIN32 */
157	kbd_echo();
158	}
159	close(fd);
160	}
161	}
162	#endif /* DEV_RANDOM */
163	rnd_state = RND_SEEDED;
164	return (0);
165	}