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
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/*
* Copyright (C) 2011 Andreas Steffen, HSR Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "imcv.h"
#include "ietf/ietf_attr.h"
#include "ita/ita_attr.h"
#include <utils/debug.h>
#include <utils/utils.h>
#include <pen/pen.h>
#include <syslog.h>
#define IMCV_DEBUG_LEVEL 1
/**
* PA-TNC attribute manager
*/
pa_tnc_attr_manager_t *imcv_pa_tnc_attributes;
/**
* Reference count for libimcv
*/
static refcount_t libimcv_ref = 0;
/**
* Reference count for libstrongswan
*/
static refcount_t libstrongswan_ref = 0;
/**
* Global configuration of imcv dbg function
*/
static int imcv_debug_level;
static bool imcv_stderr_quiet;
/**
* imvc dbg function
*/
static void imcv_dbg(debug_t group, level_t level, char *fmt, ...)
{
int priority = LOG_INFO;
char buffer[8192];
char *current = buffer, *next;
va_list args;
if (level <= imcv_debug_level)
{
if (!imcv_stderr_quiet)
{
va_start(args, fmt);
fprintf(stderr, "[HSR] ");
vfprintf(stderr, fmt, args);
fprintf(stderr, "\n");
va_end(args);
}
/* write in memory buffer first */
va_start(args, fmt);
vsnprintf(buffer, sizeof(buffer), fmt, args);
va_end(args);
/* do a syslog with every line */
while (current)
{
next = strchr(current, '\n');
if (next)
{
*(next++) = '\0';
}
syslog(priority, "[HSR] %s\n", current);
current = next;
}
}
}
/**
* Described in header.
*/
bool libimcv_init(void)
{
/* initialize libstrongswan library only once */
if (lib)
{
/* did main program initialize libstrongswan? */
if (libstrongswan_ref == 0)
{
ref_get(&libstrongswan_ref);
}
}
else
{
/* we are the first to initialize libstrongswan */
if (!library_init(NULL))
{
return FALSE;
}
/* set the debug level and stderr output */
imcv_debug_level = lib->settings->get_int(lib->settings,
"libimcv.debug_level", IMCV_DEBUG_LEVEL);
imcv_stderr_quiet = lib->settings->get_int(lib->settings,
"libimcv.stderr_quiet", FALSE);
/* activate the imcv debugging hook */
dbg = imcv_dbg;
openlog("imcv", 0, LOG_DAEMON);
if (!lib->plugins->load(lib->plugins, NULL,
"sha1 sha2 random nonce gmp pubkey x509"))
{
library_deinit();
return FALSE;
}
}
ref_get(&libstrongswan_ref);
if (libimcv_ref == 0)
{
/* initialize the PA-TNC attribute manager */
imcv_pa_tnc_attributes = pa_tnc_attr_manager_create();
imcv_pa_tnc_attributes->add_vendor(imcv_pa_tnc_attributes, PEN_IETF,
ietf_attr_create_from_data, ietf_attr_names);
imcv_pa_tnc_attributes->add_vendor(imcv_pa_tnc_attributes, PEN_ITA,
ita_attr_create_from_data, ita_attr_names);
DBG1(DBG_LIB, "libimcv initialized");
}
ref_get(&libimcv_ref);
return TRUE;
}
/**
* Described in header.
*/
void libimcv_deinit(void)
{
if (ref_put(&libimcv_ref))
{
imcv_pa_tnc_attributes->remove_vendor(imcv_pa_tnc_attributes, PEN_IETF);
imcv_pa_tnc_attributes->remove_vendor(imcv_pa_tnc_attributes, PEN_ITA);
DESTROY_IF(imcv_pa_tnc_attributes);
DBG1(DBG_LIB, "libimcv terminated");
}
if (ref_put(&libstrongswan_ref))
{
library_deinit();
}
}
|
