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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/*
* Copyright (C) 2010 Martin Willi, revosec AG
* Copyright (C) 2010 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 "eap_ttls.h"
#include "eap_ttls_peer.h"
#include "eap_ttls_server.h"
#include <tls_eap.h>
#include <daemon.h>
#include <library.h>
typedef struct private_eap_ttls_t private_eap_ttls_t;
/**
* Private data of an eap_ttls_t object.
*/
struct private_eap_ttls_t {
/**
* Public interface.
*/
eap_ttls_t public;
/**
* TLS stack, wrapped by EAP helper
*/
tls_eap_t *tls_eap;
};
/** Maximum number of EAP-TTLS messages/fragments allowed */
#define MAX_MESSAGE_COUNT 32
/** Default size of a EAP-TTLS fragment */
#define MAX_FRAGMENT_LEN 1024
METHOD(eap_method_t, initiate, status_t,
private_eap_ttls_t *this, eap_payload_t **out)
{
chunk_t data;
if (this->tls_eap->initiate(this->tls_eap, &data) == NEED_MORE)
{
*out = eap_payload_create_data(data);
free(data.ptr);
return NEED_MORE;
}
return FAILED;
}
METHOD(eap_method_t, process, status_t,
private_eap_ttls_t *this, eap_payload_t *in, eap_payload_t **out)
{
status_t status;
chunk_t data;
data = in->get_data(in);
status = this->tls_eap->process(this->tls_eap, data, &data);
if (status == NEED_MORE)
{
*out = eap_payload_create_data(data);
free(data.ptr);
}
return status;
}
METHOD(eap_method_t, get_type, eap_type_t,
private_eap_ttls_t *this, u_int32_t *vendor)
{
*vendor = 0;
return EAP_TTLS;
}
METHOD(eap_method_t, get_msk, status_t,
private_eap_ttls_t *this, chunk_t *msk)
{
*msk = this->tls_eap->get_msk(this->tls_eap);
if (msk->len)
{
return SUCCESS;
}
return FAILED;
}
METHOD(eap_method_t, get_identifier, u_int8_t,
private_eap_ttls_t *this)
{
return this->tls_eap->get_identifier(this->tls_eap);
}
METHOD(eap_method_t, set_identifier, void,
private_eap_ttls_t *this, u_int8_t identifier)
{
this->tls_eap->set_identifier(this->tls_eap, identifier);
}
METHOD(eap_method_t, is_mutual, bool,
private_eap_ttls_t *this)
{
return TRUE;
}
METHOD(eap_method_t, get_auth, auth_cfg_t*,
private_eap_ttls_t *this)
{
return this->tls_eap->get_auth(this->tls_eap);
}
METHOD(eap_method_t, destroy, void,
private_eap_ttls_t *this)
{
this->tls_eap->destroy(this->tls_eap);
free(this);
}
/**
* Generic private constructor
*/
static eap_ttls_t *eap_ttls_create(identification_t *server,
identification_t *peer, bool is_server,
tls_application_t *application)
{
private_eap_ttls_t *this;
size_t frag_size;
int max_msg_count;
bool include_length;
tls_t *tls;
INIT(this,
.public = {
.eap_method = {
.initiate = _initiate,
.process = _process,
.get_type = _get_type,
.is_mutual = _is_mutual,
.get_identifier = _get_identifier,
.set_identifier = _set_identifier,
.get_msk = _get_msk,
.get_auth = _get_auth,
.destroy = _destroy,
},
},
);
if (is_server && !lib->settings->get_bool(lib->settings,
"%s.plugins.eap-ttls.request_peer_auth", FALSE,
lib->ns))
{
peer = NULL;
}
frag_size = lib->settings->get_int(lib->settings,
"%s.plugins.eap-ttls.fragment_size", MAX_FRAGMENT_LEN,
lib->ns);
max_msg_count = lib->settings->get_int(lib->settings,
"%s.plugins.eap-ttls.max_message_count", MAX_MESSAGE_COUNT,
lib->ns);
include_length = lib->settings->get_bool(lib->settings,
"%s.plugins.eap-ttls.include_length", TRUE, lib->ns);
tls = tls_create(is_server, server, peer, TLS_PURPOSE_EAP_TTLS,
application, NULL);
this->tls_eap = tls_eap_create(EAP_TTLS, tls, frag_size, max_msg_count,
include_length);
if (!this->tls_eap)
{
application->destroy(application);
free(this);
return NULL;
}
return &this->public;
}
eap_ttls_t *eap_ttls_create_server(identification_t *server,
identification_t *peer)
{
return eap_ttls_create(server, peer, TRUE,
&eap_ttls_server_create(server, peer)->application);
}
eap_ttls_t *eap_ttls_create_peer(identification_t *server,
identification_t *peer)
{
return eap_ttls_create(server, peer, FALSE,
&eap_ttls_peer_create(server, peer)->application);
}
|
