1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/*
**
** OpenBSD emulation routines
**
** Damien Miller <djm@ibs.com.au>
**
** Copyright 1999 Internet Business Solutions
**
** Permission is hereby granted, free of charge, to any person
** obtaining a copy of this software and associated documentation
** files (the "Software"), to deal in the Software without
** restriction, including without limitation the rights to use, copy,
** modify, merge, publish, distribute, sublicense, and/or sell copies
** of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
** KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
** WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
** AND NONINFRINGEMENT. IN NO EVENT SHALL DAMIEN MILLER OR INTERNET
** BUSINESS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
** LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
** ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
** OR OTHER DEALINGS IN THE SOFTWARE.
**
** Except as contained in this notice, the name of Internet Business
** Solutions shall not be used in advertising or otherwise to promote
** the sale, use or other dealings in this Software without prior
** written authorization from Internet Business Solutions.
**
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "rc4.h"
#include "xmalloc.h"
#include "ssh.h"
#include "config.h"
#include "helper.h"
#ifndef HAVE_ARC4RANDOM
void get_random_bytes(unsigned char *buf, int len);
static rc4_t *rc4 = NULL;
unsigned int arc4random(void)
{
unsigned int r;
if (rc4 == NULL)
arc4random_stir();
rc4_getbytes(rc4, (unsigned char *)&r, sizeof(r));
return(r);
}
void arc4random_stir(void)
{
unsigned char rand_buf[32];
if (rc4 == NULL)
rc4 = xmalloc(sizeof(*rc4));
get_random_bytes(rand_buf, sizeof(rand_buf));
rc4_key(rc4, rand_buf, sizeof(rand_buf));
}
void get_random_bytes(unsigned char *buf, int len)
{
int random_pool;
int c;
#ifdef HAVE_EGD
char egd_message[2] = { 0x02, 0x00 };
#endif /* HAVE_EGD */
random_pool = open(RANDOM_POOL, O_RDONLY);
if (random_pool == -1)
fatal("Couldn't open random pool \"%s\": %s", RANDOM_POOL, strerror(errno));
#ifdef HAVE_EGD
if (len > 255)
fatal("Too many bytes to read from EGD");
/* Send blocking read request to EGD */
egd_message[1] = len;
c = write(random_pool, egd_message, sizeof(egd_message));
if (c == -1)
fatal("Couldn't write to EGD socket \"%s\": %s", RANDOM_POOL, strerror(errno));
#endif /* HAVE_EGD */
c = read(random_pool, buf, len);
if (c == -1)
fatal("Couldn't read from random pool \"%s\": %s", RANDOM_POOL, strerror(errno));
if (c != len)
fatal("Short read from random pool \"%s\"", RANDOM_POOL);
close(random_pool);
}
#endif /* !HAVE_ARC4RANDOM */
#ifndef HAVE_SETPROCTITLE
void setproctitle(const char *fmt, ...)
{
/* FIXME */
}
#endif /* !HAVE_SETPROCTITLE */
|
