Removed obsolete transform attribute setters
[strongswan.git] / src / libcharon / encoding / payloads / transform_attribute.c
1 /*
2 * Copyright (C) 2005-2010 Martin Willi
3 * Copyright (C) 2010 revosec AG
4 * Copyright (C) 2005 Jan Hutter
5 * Hochschule fuer Technik Rapperswil
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 */
17
18 #include <string.h>
19 #include <stddef.h>
20
21 #include "transform_attribute.h"
22
23 #include <encoding/payloads/encodings.h>
24 #include <library.h>
25
26 ENUM(tattr_ph1_names, TATTR_PH1_ENCRYPTION_ALGORITHM, TATTR_PH1_GROUP_ORDER,
27 "ENCRYPTION_ALGORITHM",
28 "HASH_ALGORITHM",
29 "AUTH_METHOD",
30 "GROUP",
31 "GROUP_TYPE",
32 "GROUP_PRIME",
33 "GROUP_GENONE",
34 "GROUP_GENTWO",
35 "GROUP_CURVE_A",
36 "GROUP_CURVE_B",
37 "LIFE_TYPE",
38 "LIFE_DURATION",
39 "PRF",
40 "KEY_LENGTH",
41 "FIELD_SIZE",
42 "GROUP_ORDER",
43 );
44
45 ENUM(tattr_ph2_names, TATTR_PH2_SA_LIFE_TYPE, TATTR_PH2_EXT_SEQ_NUMBER,
46 "SA_LIFE_TYPE",
47 "SA_LIFE_DURATION",
48 "GROUP",
49 "ENCAP_MODE",
50 "AUTH_ALGORITHM",
51 "KEY_LENGTH",
52 "KEY_ROUNDS",
53 "COMP_DICT_SIZE",
54 "COMP_PRIV_ALGORITHM",
55 "ECN_TUNNEL",
56 "EXT_SEQ_NUMBER",
57 );
58
59 ENUM(tattr_ikev2_names, TATTR_IKEV2_KEY_LENGTH, TATTR_IKEV2_KEY_LENGTH,
60 "KEY_LENGTH",
61 );
62
63
64 typedef struct private_transform_attribute_t private_transform_attribute_t;
65
66 /**
67 * Private data of an transform_attribute_t object.
68 */
69 struct private_transform_attribute_t {
70
71 /**
72 * Public transform_attribute_t interface.
73 */
74 transform_attribute_t public;
75
76 /**
77 * Attribute Format Flag.
78 *
79 * - TRUE means value is stored in attribute_length_or_value
80 * - FALSE means value is stored in attribute_value
81 */
82 bool attribute_format;
83
84 /**
85 * Type of the attribute.
86 */
87 u_int16_t attribute_type;
88
89 /**
90 * Attribute Length if attribute_format is 0, attribute Value otherwise.
91 */
92 u_int16_t attribute_length_or_value;
93
94 /**
95 * Attribute value as chunk if attribute_format is 0 (FALSE).
96 */
97 chunk_t attribute_value;
98
99 /**
100 * Payload type, TRANSFORM_ATTRIBUTE or TRANSFORM_ATTRIBUTE_V1
101 */
102 payload_type_t type;
103 };
104
105 /**
106 * Encoding rules for IKEv1/IKEv2 transform attributes
107 */
108 static encoding_rule_t encodings[] = {
109 /* Flag defining the format of this payload */
110 { ATTRIBUTE_FORMAT, offsetof(private_transform_attribute_t, attribute_format) },
111 /* type of the attribute as 15 bit unsigned integer */
112 { ATTRIBUTE_TYPE, offsetof(private_transform_attribute_t, attribute_type) },
113 /* Length or value, depending on the attribute format flag */
114 { ATTRIBUTE_LENGTH_OR_VALUE,offsetof(private_transform_attribute_t, attribute_length_or_value) },
115 /* Value of attribute if attribute format flag is zero */
116 { ATTRIBUTE_VALUE, offsetof(private_transform_attribute_t, attribute_value) }
117 };
118
119 /*
120 1 2 3
121 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
122 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
123 !A! Attribute Type ! AF=0 Attribute Length !
124 !F! ! AF=1 Attribute Value !
125 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
126 ! AF=0 Attribute Value !
127 ! AF=1 Not Transmitted !
128 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
129 */
130
131 METHOD(payload_t, verify, status_t,
132 private_transform_attribute_t *this)
133 {
134 return SUCCESS;
135 }
136
137 METHOD(payload_t, get_encoding_rules, int,
138 private_transform_attribute_t *this, encoding_rule_t **rules)
139 {
140 *rules = encodings;
141 return countof(encodings);
142 }
143
144 METHOD(payload_t, get_header_length, int,
145 private_transform_attribute_t *this)
146 {
147 return 0;
148 }
149
150 METHOD(payload_t, get_type, payload_type_t,
151 private_transform_attribute_t *this)
152 {
153 return this->type;
154 }
155
156 METHOD(payload_t, get_next_type, payload_type_t,
157 private_transform_attribute_t *this)
158 {
159 return NO_PAYLOAD;
160 }
161
162 METHOD(payload_t, set_next_type, void,
163 private_transform_attribute_t *this, payload_type_t type)
164 {
165 }
166
167 METHOD(payload_t, get_length, size_t,
168 private_transform_attribute_t *this)
169 {
170 if (this->attribute_format)
171 {
172 return 4;
173 }
174 return this->attribute_length_or_value + 4;
175 }
176
177 METHOD(transform_attribute_t, get_value_chunk, chunk_t,
178 private_transform_attribute_t *this)
179 {
180 if (this->attribute_format)
181 {
182 return chunk_from_thing(this->attribute_length_or_value);
183 }
184 return this->attribute_value;
185 }
186
187 METHOD(transform_attribute_t, get_value, u_int64_t,
188 private_transform_attribute_t *this)
189 {
190 u_int64_t value = 0;
191
192 if (this->attribute_format)
193 {
194 return this->attribute_length_or_value;
195 }
196 if (this->attribute_value.len > sizeof(value))
197 {
198 return UINT64_MAX;
199 }
200 memcpy(((char*)&value) + sizeof(value) - this->attribute_value.len,
201 this->attribute_value.ptr, this->attribute_value.len);
202 return be64toh(value);
203 }
204
205 METHOD(transform_attribute_t, get_attribute_type, u_int16_t,
206 private_transform_attribute_t *this)
207 {
208 return this->attribute_type;
209 }
210
211 METHOD2(payload_t, transform_attribute_t, destroy, void,
212 private_transform_attribute_t *this)
213 {
214 free(this->attribute_value.ptr);
215 free(this);
216 }
217
218 /*
219 * Described in header.
220 */
221 transform_attribute_t *transform_attribute_create(payload_type_t type)
222 {
223 private_transform_attribute_t *this;
224
225 INIT(this,
226 .public = {
227 .payload_interface = {
228 .verify = _verify,
229 .get_encoding_rules = _get_encoding_rules,
230 .get_header_length = _get_header_length,
231 .get_length = _get_length,
232 .get_next_type = _get_next_type,
233 .set_next_type = _set_next_type,
234 .get_type = _get_type,
235 .destroy = _destroy,
236 },
237 .get_value_chunk = _get_value_chunk,
238 .get_value = _get_value,
239 .get_attribute_type = _get_attribute_type,
240 .destroy = _destroy,
241 },
242 .attribute_format = FALSE,
243 .type = type,
244 );
245 return &this->public;
246 }
247
248 /*
249 * Described in header.
250 */
251 transform_attribute_t *transform_attribute_create_value(payload_type_t type,
252 transform_attribute_type_t kind, u_int64_t value)
253 {
254 private_transform_attribute_t *this;
255
256 this = (private_transform_attribute_t*)transform_attribute_create(type);
257
258 this->attribute_type = kind & 0x7FFF;
259
260 if (value <= UINT16_MAX)
261 {
262 this->attribute_length_or_value = value;
263 this->attribute_format = TRUE;
264 }
265 else if (value <= UINT32_MAX)
266 {
267 u_int32_t val32;
268
269 val32 = htonl(value);
270 this->attribute_value = chunk_clone(chunk_from_thing(val32));
271 this->attribute_length_or_value = sizeof(val32);
272 }
273 else
274 {
275 value = htobe64(value);
276 this->attribute_value = chunk_clone(chunk_from_thing(value));
277 this->attribute_length_or_value = sizeof(value);
278 }
279 return &this->public;
280 }