summaryrefslogtreecommitdiff
path: root/src/libimcv/plugins/imv_test/imv_test.c
blob: 0afd81aecf848dcaf89f9ae643f08db7b912d84a (plain)
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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
/*
 * 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 "imv_test_state.h"

#include <imv/imv_agent.h>
#include <pa_tnc/pa_tnc_msg.h>
#include <ietf/ietf_attr.h>
#include <ietf/ietf_attr_pa_tnc_error.h>
#include <ita/ita_attr.h>
#include <ita/ita_attr_command.h>

#include <tncif_names.h>
#include <tncif_pa_subtypes.h>

#include <pen/pen.h>
#include <debug.h>

/* IMV definitions */

static const char imv_name[] = "Test";

#define IMV_VENDOR_ID	PEN_ITA
#define IMV_SUBTYPE		PA_SUBTYPE_ITA_TEST

static imv_agent_t *imv_test;

/**
 * see section 3.8.1 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_Initialize(TNC_IMVID imv_id,
							  TNC_Version min_version,
							  TNC_Version max_version,
							  TNC_Version *actual_version)
{
	if (imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has already been initialized", imv_name);
		return TNC_RESULT_ALREADY_INITIALIZED;
	}
	imv_test = imv_agent_create(imv_name, IMV_VENDOR_ID, IMV_SUBTYPE,
								imv_id, actual_version);
	if (!imv_test)
	{
		return TNC_RESULT_FATAL;
	}
	if (min_version > TNC_IFIMV_VERSION_1 || max_version < TNC_IFIMV_VERSION_1)
	{
		DBG1(DBG_IMV, "no common IF-IMV version");
		return TNC_RESULT_NO_COMMON_VERSION;
	}
	return TNC_RESULT_SUCCESS;
}

/**
 * see section 3.8.2 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_NotifyConnectionChange(TNC_IMVID imv_id,
										  TNC_ConnectionID connection_id,
										  TNC_ConnectionState new_state)
{
	imv_state_t *state;

	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}
	switch (new_state)
	{
		case TNC_CONNECTION_STATE_CREATE:
			state = imv_test_state_create(connection_id);
			return imv_test->create_state(imv_test, state);
		case TNC_CONNECTION_STATE_DELETE:
			return imv_test->delete_state(imv_test, connection_id);
		default:
			return imv_test->change_state(imv_test, connection_id,
										  new_state, NULL);
	}
}

static TNC_Result receive_message(TNC_IMVID imv_id,
								  TNC_ConnectionID connection_id,
								  TNC_UInt32 msg_flags,
								  chunk_t msg,
								  TNC_VendorID msg_vid,
								  TNC_MessageSubtype msg_subtype,
								  TNC_UInt32 src_imc_id,
								  TNC_UInt32 dst_imv_id)
{
	pa_tnc_msg_t *pa_tnc_msg;
	pa_tnc_attr_t *attr;
	imv_state_t *state;
	imv_test_state_t *test_state;
	enumerator_t *enumerator;
	TNC_Result result;
	int rounds;
	bool fatal_error, retry = FALSE;

	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}

	/* get current IMV state */
	if (!imv_test->get_state(imv_test, connection_id, &state))
	{
		return TNC_RESULT_FATAL;
	}
	test_state = (imv_test_state_t*)state;

	/* parse received PA-TNC message and automatically handle any errors */ 
	result = imv_test->receive_message(imv_test, state, msg, msg_vid,
					 		msg_subtype, src_imc_id, dst_imv_id, &pa_tnc_msg);

	/* no parsed PA-TNC attributes available if an error occurred */
	if (!pa_tnc_msg)
	{
		return result;
	}

	/* preprocess any IETF standard error attributes */
	fatal_error = pa_tnc_msg->process_ietf_std_errors(pa_tnc_msg);

	/* add any new IMC and set its number of rounds */
	rounds = lib->settings->get_int(lib->settings,
								"libimcv.plugins.imv-test.rounds", 0);
	test_state->add_imc(test_state, src_imc_id, rounds);

	/* analyze PA-TNC attributes */
	enumerator = pa_tnc_msg->create_attribute_enumerator(pa_tnc_msg);
	while (enumerator->enumerate(enumerator, &attr))
	{
		if (attr->get_vendor_id(attr) == PEN_ITA &&
			attr->get_type(attr) == ITA_ATTR_COMMAND)
		{
			ita_attr_command_t *ita_attr;
			char *command;
	
			ita_attr = (ita_attr_command_t*)attr;
			command = ita_attr->get_command(ita_attr);

			if (streq(command, "allow"))
			{
				state->set_recommendation(state,
								TNC_IMV_ACTION_RECOMMENDATION_ALLOW,
								TNC_IMV_EVALUATION_RESULT_COMPLIANT);			  
			}
			else if (streq(command, "isolate"))
			{
				state->set_recommendation(state,
								TNC_IMV_ACTION_RECOMMENDATION_ISOLATE,
								TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MINOR);			  
			}
			else if (streq(command, "block") || streq(command, "none"))
			{
				state->set_recommendation(state,
								TNC_IMV_ACTION_RECOMMENDATION_NO_ACCESS,
								TNC_IMV_EVALUATION_RESULT_NONCOMPLIANT_MAJOR);			  
			}
			else if (streq(command, "retry"))
			{
				retry = TRUE;
			}
			else
			{
				DBG1(DBG_IMV, "unsupported ITA Command '%s'", command);
				state->set_recommendation(state,
								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
								TNC_IMV_EVALUATION_RESULT_ERROR);			  
			}
		}		
	}
	enumerator->destroy(enumerator);
	pa_tnc_msg->destroy(pa_tnc_msg);

	if (fatal_error)
	{
		state->set_recommendation(state,
								TNC_IMV_ACTION_RECOMMENDATION_NO_RECOMMENDATION,
								TNC_IMV_EVALUATION_RESULT_ERROR);			  
		return imv_test->provide_recommendation(imv_test, connection_id);
	}

	/* request a handshake retry ? */
	if (retry)
	{
		test_state->set_rounds(test_state, rounds);
		return imv_test->request_handshake_retry(imv_id, connection_id,
								TNC_RETRY_REASON_IMV_SERIOUS_EVENT);
	}
	
	/* repeat the measurement ? */
	if (test_state->another_round(test_state, src_imc_id))
	{
		attr = ita_attr_command_create("repeat");
		pa_tnc_msg = pa_tnc_msg_create();
		pa_tnc_msg->add_attribute(pa_tnc_msg, attr);
		pa_tnc_msg->build(pa_tnc_msg);
		result = imv_test->send_message(imv_test, connection_id, TRUE, imv_id,
							src_imc_id, pa_tnc_msg->get_encoding(pa_tnc_msg));	
		pa_tnc_msg->destroy(pa_tnc_msg);

		return result;
	}

	return imv_test->provide_recommendation(imv_test, connection_id);
}

/**
 * see section 3.8.4 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
								  TNC_ConnectionID connection_id,
								  TNC_BufferReference msg,
								  TNC_UInt32 msg_len,
								  TNC_MessageType msg_type)
{
	TNC_VendorID msg_vid;
	TNC_MessageSubtype msg_subtype;

	msg_vid = msg_type >> 8;
	msg_subtype = msg_type & TNC_SUBTYPE_ANY;

	return receive_message(imv_id, connection_id, 0, chunk_create(msg, msg_len),
						   msg_vid,	msg_subtype, 0, TNC_IMVID_ANY);
}

/**
 * see section 3.8.6 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_ReceiveMessageLong(TNC_IMVID imv_id,
									  TNC_ConnectionID connection_id,
									  TNC_UInt32 msg_flags,
									  TNC_BufferReference msg,
									  TNC_UInt32 msg_len,
									  TNC_VendorID msg_vid,
									  TNC_MessageSubtype msg_subtype,
									  TNC_UInt32 src_imc_id,
									  TNC_UInt32 dst_imv_id)
{
	return receive_message(imv_id, connection_id, msg_flags,
						   chunk_create(msg, msg_len), msg_vid, msg_subtype,
						   src_imc_id, dst_imv_id);
}

/**
 * see section 3.8.7 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_SolicitRecommendation(TNC_IMVID imv_id,
										 TNC_ConnectionID connection_id)
{
	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}
	return imv_test->provide_recommendation(imv_test, connection_id);
}

/**
 * see section 3.8.8 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_BatchEnding(TNC_IMVID imv_id,
							   TNC_ConnectionID connection_id)
{
	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}
	return TNC_RESULT_SUCCESS;
}

/**
 * see section 3.8.9 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_Terminate(TNC_IMVID imv_id)
{
	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}
	imv_test->destroy(imv_test);
	imv_test = NULL;

	return TNC_RESULT_SUCCESS;
}

/**
 * see section 4.2.8.1 of TCG TNC IF-IMV Specification 1.3
 */
TNC_Result TNC_IMV_ProvideBindFunction(TNC_IMVID imv_id,
									   TNC_TNCS_BindFunctionPointer bind_function)
{
	if (!imv_test)
	{
		DBG1(DBG_IMV, "IMV \"%s\" has not been initialized", imv_name);
		return TNC_RESULT_NOT_INITIALIZED;
	}
	return imv_test->bind_functions(imv_test, bind_function);
}