payload: Use common prefixes for all payload type identifiers
[strongswan.git] / src / libcharon / encoding / payloads / proposal_substructure.c
1 /*
2 * Copyright (C) 2012 Tobias Brunner
3 * Copyright (C) 2005-2010 Martin Willi
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 <stddef.h>
19
20 #include "proposal_substructure.h"
21
22 #include <encoding/payloads/encodings.h>
23 #include <encoding/payloads/transform_substructure.h>
24 #include <library.h>
25 #include <collections/linked_list.h>
26 #include <daemon.h>
27
28 /**
29 * IKEv2 Value for a proposal payload.
30 */
31 #define PROPOSAL_TYPE_VALUE 2
32
33 typedef struct private_proposal_substructure_t private_proposal_substructure_t;
34
35 /**
36 * Private data of an proposal_substructure_t object.
37 */
38 struct private_proposal_substructure_t {
39
40 /**
41 * Public proposal_substructure_t interface.
42 */
43 proposal_substructure_t public;
44
45 /**
46 * Next payload type.
47 */
48 u_int8_t next_payload;
49
50 /**
51 * reserved byte
52 */
53 u_int8_t reserved;
54
55 /**
56 * Length of this payload.
57 */
58 u_int16_t proposal_length;
59
60 /**
61 * Proposal number.
62 */
63 u_int8_t proposal_number;
64
65 /**
66 * Protocol ID.
67 */
68 u_int8_t protocol_id;
69
70 /**
71 * SPI size of the following SPI.
72 */
73 u_int8_t spi_size;
74
75 /**
76 * Number of transforms.
77 */
78 u_int8_t transforms_count;
79
80 /**
81 * SPI is stored as chunk.
82 */
83 chunk_t spi;
84
85 /**
86 * Transforms are stored in a linked_list_t.
87 */
88 linked_list_t *transforms;
89
90 /**
91 * Type of this payload, PLV2_PROPOSAL_SUBSTRUCTURE or PLV1_PROPOSAL_SUBSTRUCTURE
92 */
93 payload_type_t type;
94 };
95
96 /**
97 * Encoding rules for a IKEv1 Proposal substructure.
98 */
99 static encoding_rule_t encodings_v1[] = {
100 /* 1 Byte next payload type, stored in the field next_payload */
101 { U_INT_8, offsetof(private_proposal_substructure_t, next_payload) },
102 /* 1 Reserved Byte */
103 { RESERVED_BYTE, offsetof(private_proposal_substructure_t, reserved) },
104 /* Length of the whole proposal substructure payload*/
105 { PAYLOAD_LENGTH, offsetof(private_proposal_substructure_t, proposal_length) },
106 /* proposal number is a number of 8 bit */
107 { U_INT_8, offsetof(private_proposal_substructure_t, proposal_number) },
108 /* protocol ID is a number of 8 bit */
109 { U_INT_8, offsetof(private_proposal_substructure_t, protocol_id) },
110 /* SPI Size has its own type */
111 { SPI_SIZE, offsetof(private_proposal_substructure_t, spi_size) },
112 /* Number of transforms is a number of 8 bit */
113 { U_INT_8, offsetof(private_proposal_substructure_t, transforms_count) },
114 /* SPI is a chunk of variable size*/
115 { SPI, offsetof(private_proposal_substructure_t, spi) },
116 /* Transforms are stored in a transform substructure list */
117 { PAYLOAD_LIST + PLV1_TRANSFORM_SUBSTRUCTURE,
118 offsetof(private_proposal_substructure_t, transforms) },
119 };
120
121 /**
122 * Encoding rules for a IKEv2 Proposal substructure.
123 */
124 static encoding_rule_t encodings_v2[] = {
125 /* 1 Byte next payload type, stored in the field next_payload */
126 { U_INT_8, offsetof(private_proposal_substructure_t, next_payload) },
127 /* 1 Reserved Byte */
128 { RESERVED_BYTE, offsetof(private_proposal_substructure_t, reserved) },
129 /* Length of the whole proposal substructure payload*/
130 { PAYLOAD_LENGTH, offsetof(private_proposal_substructure_t, proposal_length) },
131 /* proposal number is a number of 8 bit */
132 { U_INT_8, offsetof(private_proposal_substructure_t, proposal_number) },
133 /* protocol ID is a number of 8 bit */
134 { U_INT_8, offsetof(private_proposal_substructure_t, protocol_id) },
135 /* SPI Size has its own type */
136 { SPI_SIZE, offsetof(private_proposal_substructure_t, spi_size) },
137 /* Number of transforms is a number of 8 bit */
138 { U_INT_8, offsetof(private_proposal_substructure_t, transforms_count) },
139 /* SPI is a chunk of variable size*/
140 { SPI, offsetof(private_proposal_substructure_t, spi) },
141 /* Transforms are stored in a transform substructure list */
142 { PAYLOAD_LIST + PLV2_TRANSFORM_SUBSTRUCTURE,
143 offsetof(private_proposal_substructure_t, transforms) },
144 };
145
146 /*
147 1 2 3
148 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
149 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
150 ! 0 (last) or 2 ! RESERVED ! Proposal Length !
151 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
152 ! Proposal # ! Protocol ID ! SPI Size !# of Transforms!
153 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
154 ~ SPI (variable) ~
155 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
156 ! !
157 ~ <Transforms> ~
158 ! !
159 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
160 */
161
162 /**
163 * Encryption.
164 */
165 typedef enum {
166 IKEV1_ENCR_DES_CBC = 1,
167 IKEV1_ENCR_IDEA_CBC = 2,
168 IKEV1_ENCR_BLOWFISH_CBC = 3,
169 IKEV1_ENCR_RC5_R16_B64_CBC = 4,
170 IKEV1_ENCR_3DES_CBC = 5,
171 IKEV1_ENCR_CAST_CBC = 6,
172 IKEV1_ENCR_AES_CBC = 7,
173 IKEV1_ENCR_CAMELLIA_CBC = 8,
174 /* FreeS/WAN proprietary */
175 IKEV1_ENCR_SERPENT_CBC = 65004,
176 IKEV1_ENCR_TWOFISH_CBC = 65005,
177 } ikev1_encryption_t;
178
179 /**
180 * IKEv1 hash.
181 */
182 typedef enum {
183 IKEV1_HASH_MD5 = 1,
184 IKEV1_HASH_SHA1 = 2,
185 IKEV1_HASH_TIGER = 3,
186 IKEV1_HASH_SHA2_256 = 4,
187 IKEV1_HASH_SHA2_384 = 5,
188 IKEV1_HASH_SHA2_512 = 6,
189 } ikev1_hash_t;
190
191 /**
192 * IKEv1 Transform ID IKE.
193 */
194 typedef enum {
195 IKEV1_TRANSID_KEY_IKE = 1,
196 } ikev1_ike_transid_t;
197
198 /**
199 * IKEv1 Transform ID ESP encryption algorithm.
200 */
201 typedef enum {
202 IKEV1_ESP_ENCR_DES_IV64 = 1,
203 IKEV1_ESP_ENCR_DES = 2,
204 IKEV1_ESP_ENCR_3DES = 3,
205 IKEV1_ESP_ENCR_RC5 = 4,
206 IKEV1_ESP_ENCR_IDEA = 5,
207 IKEV1_ESP_ENCR_CAST = 6,
208 IKEV1_ESP_ENCR_BLOWFISH = 7,
209 IKEV1_ESP_ENCR_3IDEA = 8,
210 IKEV1_ESP_ENCR_DES_IV32 = 9,
211 IKEV1_ESP_ENCR_RC4 = 10,
212 IKEV1_ESP_ENCR_NULL = 11,
213 IKEV1_ESP_ENCR_AES_CBC = 12,
214 IKEV1_ESP_ENCR_AES_CTR = 13,
215 IKEV1_ESP_ENCR_AES_CCM_8 = 14,
216 IKEV1_ESP_ENCR_AES_CCM_12 = 15,
217 IKEV1_ESP_ENCR_AES_CCM_16 = 16,
218 IKEV1_ESP_ENCR_AES_GCM_8 = 18,
219 IKEV1_ESP_ENCR_AES_GCM_12 = 19,
220 IKEV1_ESP_ENCR_AES_GCM_16 = 20,
221 IKEV1_ESP_ENCR_SEED_CBC = 21,
222 IKEV1_ESP_ENCR_CAMELLIA = 22,
223 IKEV1_ESP_ENCR_NULL_AUTH_AES_GMAC = 23,
224 /* FreeS/WAN proprietary */
225 IKEV1_ESP_ENCR_SERPENT = 252,
226 IKEV1_ESP_ENCR_TWOFISH = 253,
227 } ikev1_esp_encr_transid_t;
228
229 /**
230 * IKEv1 Transform ID ESP authentication algorithm.
231 */
232 typedef enum {
233 IKEV1_ESP_AUTH_HMAC_MD5 = 1,
234 IKEV1_ESP_AUTH_HMAC_SHA = 2,
235 IKEV1_ESP_AUTH_DES_MAC = 3,
236 IKEV1_ESP_AUTH_KPDK = 4,
237 IKEV1_ESP_AUTH_HMAC_SHA2_256 = 5,
238 IKEV1_ESP_AUTH_HMAC_SHA2_384 = 6,
239 IKEV1_ESP_AUTH_HMAC_SHA2_512 = 7,
240 IKEV1_ESP_AUTH_HMAC_RIPEMD = 8,
241 IKEV1_ESP_AUTH_AES_XCBC_MAC = 9,
242 IKEV1_ESP_AUTH_SIG_RSA = 10,
243 IKEV1_ESP_AUTH_AES_128_GMAC = 11,
244 IKEV1_ESP_AUTH_AES_192_GMAC = 12,
245 IKEV1_ESP_AUTH_AES_256_GMAC = 13,
246 } ikev1_esp_auth_transid_it;
247
248 /**
249 * IKEv1 Transform ID AH authentication algorithm.
250 */
251 typedef enum {
252 IKEV1_AH_HMAC_MD5 = 2,
253 IKEV1_AH_HMAC_SHA = 3,
254 IKEV1_AH_DES_MAC = 4,
255 IKEV1_AH_HMAC_SHA2_256 = 5,
256 IKEV1_AH_HMAC_SHA2_384 = 6,
257 IKEV1_AH_HMAC_SHA2_512 = 7,
258 IKEV1_AH_RIPEMD = 8,
259 IKEV1_AH_AES_XCBC_MAC = 9,
260 IKEV1_AH_RSA = 10,
261 IKEV1_AH_AES_128_GMAC = 11,
262 IKEV1_AH_AES_192_GMAC = 12,
263 IKEV1_AH_AES_256_GMAC = 13,
264 } ikev1_ah_transid_t;
265
266 /**
267 * IKEv1 ESP Encapsulation mode.
268 */
269 typedef enum {
270 IKEV1_ENCAP_TUNNEL = 1,
271 IKEV1_ENCAP_TRANSPORT = 2,
272 IKEV1_ENCAP_UDP_TUNNEL = 3,
273 IKEV1_ENCAP_UDP_TRANSPORT = 4,
274 IKEV1_ENCAP_UDP_TUNNEL_DRAFT_00_03 = 61443,
275 IKEV1_ENCAP_UDP_TRANSPORT_DRAFT_00_03 = 61444,
276 } ikev1_esp_encap_t;
277
278 /**
279 * IKEv1 Life duration types.
280 */
281 typedef enum {
282 IKEV1_LIFE_TYPE_SECONDS = 1,
283 IKEV1_LIFE_TYPE_KILOBYTES = 2,
284 } ikev1_life_type_t;
285
286 /**
287 * IKEv1 authentication methods
288 */
289 typedef enum {
290 IKEV1_AUTH_PSK = 1,
291 IKEV1_AUTH_DSS_SIG = 2,
292 IKEV1_AUTH_RSA_SIG = 3,
293 IKEV1_AUTH_RSA_ENC = 4,
294 IKEV1_AUTH_RSA_ENC_REV = 5,
295 IKEV1_AUTH_ECDSA_256 = 9,
296 IKEV1_AUTH_ECDSA_384 = 10,
297 IKEV1_AUTH_ECDSA_521 = 11,
298 /* XAuth Modes */
299 IKEV1_AUTH_XAUTH_INIT_PSK = 65001,
300 IKEV1_AUTH_XAUTH_RESP_PSK = 65002,
301 IKEV1_AUTH_XAUTH_INIT_DSS = 65003,
302 IKEV1_AUTH_XAUTH_RESP_DSS = 65004,
303 IKEV1_AUTH_XAUTH_INIT_RSA = 65005,
304 IKEV1_AUTH_XAUTH_RESP_RSA = 65006,
305 IKEV1_AUTH_XAUTH_INIT_RSA_ENC = 65007,
306 IKEV1_AUTH_XAUTH_RESP_RSA_ENC = 65008,
307 IKEV1_AUTH_XAUTH_INIT_RSA_ENC_REV = 65009,
308 IKEV1_AUTH_XAUTH_RESP_RSA_ENC_REV = 65010,
309 /* Hybrid Modes */
310 IKEV1_AUTH_HYBRID_INIT_RSA = 64221,
311 IKEV1_AUTH_HYBRID_RESP_RSA = 64222,
312 IKEV1_AUTH_HYBRID_INIT_DSS = 64223,
313 IKEV1_AUTH_HYBRID_RESP_DSS = 64224,
314 } ikev1_auth_method_t;
315
316 /**
317 * IKEv1 IPComp transform IDs
318 */
319 typedef enum {
320 IKEV1_IPCOMP_OUI = 1,
321 IKEV1_IPCOMP_DEFLATE = 2,
322 IKEV1_IPCOMP_LZS = 3,
323 } ikev1_ipcomp_transform_t;
324
325 METHOD(payload_t, verify, status_t,
326 private_proposal_substructure_t *this)
327 {
328 status_t status = SUCCESS;
329 enumerator_t *enumerator;
330 payload_t *current;
331
332 if (this->next_payload != PL_NONE && this->next_payload != 2)
333 {
334 /* must be 0 or 2 */
335 DBG1(DBG_ENC, "inconsistent next payload");
336 return FAILED;
337 }
338 if (this->transforms_count != this->transforms->get_count(this->transforms))
339 {
340 /* must be the same! */
341 DBG1(DBG_ENC, "transform count invalid");
342 return FAILED;
343 }
344
345 switch (this->protocol_id)
346 {
347 case PROTO_IPCOMP:
348 if (this->spi.len != 2)
349 {
350 DBG1(DBG_ENC, "invalid CPI length in IPCOMP proposal");
351 return FAILED;
352 }
353 break;
354 case PROTO_AH:
355 case PROTO_ESP:
356 if (this->spi.len != 4)
357 {
358 DBG1(DBG_ENC, "invalid SPI length in %N proposal",
359 protocol_id_names, this->protocol_id);
360 return FAILED;
361 }
362 break;
363 case PROTO_IKE:
364 if (this->type == PLV1_PROPOSAL_SUBSTRUCTURE)
365 {
366 if (this->spi.len <= 16)
367 { /* according to RFC 2409, section 3.5 anything between
368 * 0 and 16 is fine */
369 break;
370 }
371 }
372 else if (this->spi.len == 0 || this->spi.len == 8)
373 {
374 break;
375 }
376 DBG1(DBG_ENC, "invalid SPI length in IKE proposal");
377 return FAILED;
378 default:
379 break;
380 }
381 enumerator = this->transforms->create_enumerator(this->transforms);
382 while (enumerator->enumerate(enumerator, &current))
383 {
384 status = current->verify(current);
385 if (status != SUCCESS)
386 {
387 DBG1(DBG_ENC, "TRANSFORM_SUBSTRUCTURE verification failed");
388 break;
389 }
390 }
391 enumerator->destroy(enumerator);
392
393 /* proposal number is checked in SA payload */
394 return status;
395 }
396
397 METHOD(payload_t, get_encoding_rules, int,
398 private_proposal_substructure_t *this, encoding_rule_t **rules)
399 {
400 if (this->type == PLV2_PROPOSAL_SUBSTRUCTURE)
401 {
402 *rules = encodings_v2;
403 return countof(encodings_v2);
404 }
405 *rules = encodings_v1;
406 return countof(encodings_v1);
407 }
408
409 METHOD(payload_t, get_header_length, int,
410 private_proposal_substructure_t *this)
411 {
412 return 8 + this->spi_size;
413 }
414
415 METHOD(payload_t, get_type, payload_type_t,
416 private_proposal_substructure_t *this)
417 {
418 return this->type;
419 }
420
421 METHOD(payload_t, get_next_type, payload_type_t,
422 private_proposal_substructure_t *this)
423 {
424 return this->next_payload;
425 }
426
427 METHOD(payload_t, set_next_type, void,
428 private_proposal_substructure_t *this, payload_type_t type)
429 {
430 }
431
432 /**
433 * (re-)compute the length of the payload.
434 */
435 static void compute_length(private_proposal_substructure_t *this)
436 {
437 enumerator_t *enumerator;
438 payload_t *transform;
439
440 this->transforms_count = 0;
441 this->proposal_length = get_header_length(this);
442 enumerator = this->transforms->create_enumerator(this->transforms);
443 while (enumerator->enumerate(enumerator, &transform))
444 {
445 this->proposal_length += transform->get_length(transform);
446 this->transforms_count++;
447 }
448 enumerator->destroy(enumerator);
449 }
450
451 METHOD(payload_t, get_length, size_t,
452 private_proposal_substructure_t *this)
453 {
454 return this->proposal_length;
455 }
456
457 /**
458 * Add a transform substructure to the proposal
459 */
460 static void add_transform_substructure(private_proposal_substructure_t *this,
461 transform_substructure_t *transform)
462 {
463 if (this->transforms->get_count(this->transforms) > 0)
464 {
465 transform_substructure_t *last;
466
467 this->transforms->get_last(this->transforms, (void **)&last);
468 last->set_is_last_transform(last, FALSE);
469 }
470 transform->set_is_last_transform(transform,TRUE);
471 this->transforms->insert_last(this->transforms, transform);
472 compute_length(this);
473 }
474
475 METHOD(proposal_substructure_t, set_is_last_proposal, void,
476 private_proposal_substructure_t *this, bool is_last)
477 {
478 this->next_payload = is_last ? 0 : PROPOSAL_TYPE_VALUE;
479 }
480
481 METHOD(proposal_substructure_t, set_proposal_number, void,
482 private_proposal_substructure_t *this,u_int8_t proposal_number)
483 {
484 this->proposal_number = proposal_number;
485 }
486
487 METHOD(proposal_substructure_t, get_proposal_number, u_int8_t,
488 private_proposal_substructure_t *this)
489 {
490 return this->proposal_number;
491 }
492
493 METHOD(proposal_substructure_t, set_protocol_id, void,
494 private_proposal_substructure_t *this,u_int8_t protocol_id)
495 {
496 this->protocol_id = protocol_id;
497 }
498
499 METHOD(proposal_substructure_t, get_protocol_id, u_int8_t,
500 private_proposal_substructure_t *this)
501 {
502 return this->protocol_id;
503 }
504
505 METHOD(proposal_substructure_t, set_spi, void,
506 private_proposal_substructure_t *this, chunk_t spi)
507 {
508 free(this->spi.ptr);
509 this->spi = chunk_clone(spi);
510 this->spi_size = spi.len;
511 compute_length(this);
512 }
513
514 METHOD(proposal_substructure_t, get_spi, chunk_t,
515 private_proposal_substructure_t *this)
516 {
517 return this->spi;
518 }
519
520 METHOD(proposal_substructure_t, get_cpi, bool,
521 private_proposal_substructure_t *this, u_int16_t *cpi)
522 {
523
524 transform_substructure_t *transform;
525 enumerator_t *enumerator;
526
527 if (this->protocol_id != PROTO_IPCOMP)
528 {
529 return FALSE;
530 }
531
532 enumerator = this->transforms->create_enumerator(this->transforms);
533 while (enumerator->enumerate(enumerator, &transform))
534 {
535 if (transform->get_transform_id(transform) == IKEV1_IPCOMP_DEFLATE)
536 {
537 if (cpi)
538 {
539 *cpi = *((u_int16_t*)this->spi.ptr);
540 }
541 enumerator->destroy(enumerator);
542 return TRUE;
543 }
544 }
545 enumerator->destroy(enumerator);
546 return FALSE;
547 }
548
549 /**
550 * Add a transform to a proposal for IKEv2
551 */
552 static void add_to_proposal_v2(proposal_t *proposal,
553 transform_substructure_t *transform)
554 {
555 transform_attribute_t *tattr;
556 enumerator_t *enumerator;
557 u_int16_t key_length = 0;
558
559 enumerator = transform->create_attribute_enumerator(transform);
560 while (enumerator->enumerate(enumerator, &tattr))
561 {
562 if (tattr->get_attribute_type(tattr) == TATTR_IKEV2_KEY_LENGTH)
563 {
564 key_length = tattr->get_value(tattr);
565 break;
566 }
567 }
568 enumerator->destroy(enumerator);
569
570 proposal->add_algorithm(proposal,
571 transform->get_transform_type_or_number(transform),
572 transform->get_transform_id(transform), key_length);
573 }
574
575 /**
576 * Map IKEv1 to IKEv2 algorithms
577 */
578 typedef struct {
579 u_int16_t ikev1;
580 u_int16_t ikev2;
581 } algo_map_t;
582
583 /**
584 * Encryption algorithm mapping
585 */
586 static algo_map_t map_encr[] = {
587 { IKEV1_ENCR_DES_CBC, ENCR_DES },
588 { IKEV1_ENCR_IDEA_CBC, ENCR_IDEA },
589 { IKEV1_ENCR_BLOWFISH_CBC, ENCR_BLOWFISH },
590 { IKEV1_ENCR_3DES_CBC, ENCR_3DES },
591 { IKEV1_ENCR_CAST_CBC, ENCR_CAST },
592 { IKEV1_ENCR_AES_CBC, ENCR_AES_CBC },
593 { IKEV1_ENCR_CAMELLIA_CBC, ENCR_CAMELLIA_CBC },
594 { IKEV1_ENCR_SERPENT_CBC, ENCR_SERPENT_CBC },
595 { IKEV1_ENCR_TWOFISH_CBC, ENCR_TWOFISH_CBC },
596 };
597
598 /**
599 * Integrity algorithm mapping
600 */
601 static algo_map_t map_integ[] = {
602 { IKEV1_HASH_MD5, AUTH_HMAC_MD5_96 },
603 { IKEV1_HASH_SHA1, AUTH_HMAC_SHA1_96 },
604 { IKEV1_HASH_SHA2_256, AUTH_HMAC_SHA2_256_128 },
605 { IKEV1_HASH_SHA2_384, AUTH_HMAC_SHA2_384_192 },
606 { IKEV1_HASH_SHA2_512, AUTH_HMAC_SHA2_512_256 },
607 };
608
609 /**
610 * PRF algorithm mapping
611 */
612 static algo_map_t map_prf[] = {
613 { IKEV1_HASH_MD5, PRF_HMAC_MD5 },
614 { IKEV1_HASH_SHA1, PRF_HMAC_SHA1 },
615 { IKEV1_HASH_SHA2_256, PRF_HMAC_SHA2_256 },
616 { IKEV1_HASH_SHA2_384, PRF_HMAC_SHA2_384 },
617 { IKEV1_HASH_SHA2_512, PRF_HMAC_SHA2_512 },
618 };
619
620 /**
621 * ESP encryption algorithm mapping
622 */
623 static algo_map_t map_esp_encr[] = {
624 { IKEV1_ESP_ENCR_DES_IV64, ENCR_DES_IV64 },
625 { IKEV1_ESP_ENCR_DES, ENCR_DES },
626 { IKEV1_ESP_ENCR_3DES, ENCR_3DES },
627 { IKEV1_ESP_ENCR_RC5, ENCR_RC5 },
628 { IKEV1_ESP_ENCR_IDEA, ENCR_IDEA },
629 { IKEV1_ESP_ENCR_CAST, ENCR_CAST },
630 { IKEV1_ESP_ENCR_BLOWFISH, ENCR_BLOWFISH },
631 { IKEV1_ESP_ENCR_3IDEA, ENCR_3IDEA },
632 { IKEV1_ESP_ENCR_DES_IV32, ENCR_DES_IV32 },
633 { IKEV1_ESP_ENCR_NULL, ENCR_NULL },
634 { IKEV1_ESP_ENCR_AES_CBC, ENCR_AES_CBC },
635 { IKEV1_ESP_ENCR_AES_CTR, ENCR_AES_CTR },
636 { IKEV1_ESP_ENCR_AES_CCM_8, ENCR_AES_CCM_ICV8 },
637 { IKEV1_ESP_ENCR_AES_CCM_12, ENCR_AES_CCM_ICV12 },
638 { IKEV1_ESP_ENCR_AES_CCM_16, ENCR_AES_CCM_ICV16 },
639 { IKEV1_ESP_ENCR_AES_GCM_8, ENCR_AES_GCM_ICV8 },
640 { IKEV1_ESP_ENCR_AES_GCM_12, ENCR_AES_GCM_ICV12 },
641 { IKEV1_ESP_ENCR_AES_GCM_16, ENCR_AES_GCM_ICV16 },
642 { IKEV1_ESP_ENCR_CAMELLIA, ENCR_CAMELLIA_CBC },
643 { IKEV1_ESP_ENCR_NULL_AUTH_AES_GMAC, ENCR_NULL_AUTH_AES_GMAC },
644 { IKEV1_ESP_ENCR_SERPENT, ENCR_SERPENT_CBC },
645 { IKEV1_ESP_ENCR_TWOFISH, ENCR_TWOFISH_CBC },
646 };
647
648 /**
649 * ESP authentication algorithm mapping
650 */
651 static algo_map_t map_esp_auth[] = {
652 { IKEV1_ESP_AUTH_HMAC_MD5, AUTH_HMAC_MD5_96 },
653 { IKEV1_ESP_AUTH_HMAC_SHA, AUTH_HMAC_SHA1_96 },
654 { IKEV1_ESP_AUTH_DES_MAC, AUTH_DES_MAC },
655 { IKEV1_ESP_AUTH_KPDK, AUTH_KPDK_MD5 },
656 { IKEV1_ESP_AUTH_HMAC_SHA2_256, AUTH_HMAC_SHA2_256_128 },
657 { IKEV1_ESP_AUTH_HMAC_SHA2_384, AUTH_HMAC_SHA2_384_192 },
658 { IKEV1_ESP_AUTH_HMAC_SHA2_512, AUTH_HMAC_SHA2_512_256 },
659 { IKEV1_ESP_AUTH_AES_XCBC_MAC, AUTH_AES_XCBC_96 },
660 { IKEV1_ESP_AUTH_AES_128_GMAC, AUTH_AES_128_GMAC },
661 { IKEV1_ESP_AUTH_AES_192_GMAC, AUTH_AES_192_GMAC },
662 { IKEV1_ESP_AUTH_AES_256_GMAC, AUTH_AES_256_GMAC },
663 };
664
665 /**
666 * AH authentication algorithm mapping
667 */
668 static algo_map_t map_ah[] = {
669 { IKEV1_AH_HMAC_MD5, AUTH_HMAC_MD5_96 },
670 { IKEV1_AH_HMAC_SHA, AUTH_HMAC_SHA1_96 },
671 { IKEV1_AH_DES_MAC, AUTH_DES_MAC },
672 { IKEV1_AH_HMAC_SHA2_256, AUTH_HMAC_SHA2_256_128 },
673 { IKEV1_AH_HMAC_SHA2_384, AUTH_HMAC_SHA2_384_192 },
674 { IKEV1_AH_HMAC_SHA2_512, AUTH_HMAC_SHA2_512_256 },
675 { IKEV1_AH_AES_XCBC_MAC, AUTH_AES_XCBC_96 },
676 { IKEV1_AH_AES_128_GMAC, AUTH_AES_128_GMAC },
677 { IKEV1_AH_AES_192_GMAC, AUTH_AES_192_GMAC },
678 { IKEV1_AH_AES_256_GMAC, AUTH_AES_256_GMAC },
679 };
680
681 /**
682 * Get IKEv2 algorithm from IKEv1 identifier
683 */
684 static u_int16_t get_alg_from_ikev1(transform_type_t type, u_int16_t value)
685 {
686 algo_map_t *map;
687 u_int16_t def;
688 int i, count;
689
690 switch (type)
691 {
692 case ENCRYPTION_ALGORITHM:
693 map = map_encr;
694 count = countof(map_encr);
695 def = ENCR_UNDEFINED;
696 break;
697 case INTEGRITY_ALGORITHM:
698 map = map_integ;
699 count = countof(map_integ);
700 def = AUTH_UNDEFINED;
701 break;
702 case PSEUDO_RANDOM_FUNCTION:
703 map = map_prf;
704 count = countof(map_prf);
705 def = PRF_UNDEFINED;
706 break;
707 default:
708 return 0;
709 }
710 for (i = 0; i < count; i++)
711 {
712 if (map[i].ikev1 == value)
713 {
714 return map[i].ikev2;
715 }
716 }
717 return def;
718 }
719
720 /**
721 * Get IKEv1 algorithm from IKEv2 identifier
722 */
723 static u_int16_t get_ikev1_from_alg(transform_type_t type, u_int16_t value)
724 {
725 algo_map_t *map;
726 int i, count;
727
728 switch (type)
729 {
730 case ENCRYPTION_ALGORITHM:
731 map = map_encr;
732 count = countof(map_encr);
733 break;
734 case INTEGRITY_ALGORITHM:
735 map = map_integ;
736 count = countof(map_integ);
737 break;
738 case PSEUDO_RANDOM_FUNCTION:
739 map = map_prf;
740 count = countof(map_prf);
741 break;
742 default:
743 return 0;
744 }
745 for (i = 0; i < count; i++)
746 {
747 if (map[i].ikev2 == value)
748 {
749 return map[i].ikev1;
750 }
751 }
752 return 0;
753 }
754
755 /**
756 * Get IKEv2 algorithm from IKEv1 ESP transaction ID
757 */
758 static u_int16_t get_alg_from_ikev1_transid(protocol_id_t proto,
759 transform_type_t type, u_int16_t value)
760 {
761 algo_map_t *map;
762 u_int16_t def;
763 int i, count;
764
765 switch (type)
766 {
767 case ENCRYPTION_ALGORITHM:
768 map = map_esp_encr;
769 count = countof(map_esp_encr);
770 def = ENCR_UNDEFINED;
771 break;
772 case INTEGRITY_ALGORITHM:
773 if (proto == PROTO_ESP)
774 {
775 map = map_esp_auth;
776 count = countof(map_esp_auth);
777 }
778 else
779 {
780 map = map_ah;
781 count = countof(map_ah);
782 }
783 def = AUTH_UNDEFINED;
784 break;
785 default:
786 return 0;
787 }
788 for (i = 0; i < count; i++)
789 {
790 if (map[i].ikev1 == value)
791 {
792 return map[i].ikev2;
793 }
794 }
795 return def;
796 }
797
798 /**
799 * Get IKEv1 ESP/AH transaction ID from IKEv2 identifier
800 */
801 static u_int16_t get_ikev1_transid_from_alg(protocol_id_t proto,
802 transform_type_t type, u_int16_t value)
803 {
804 algo_map_t *map;
805 int i, count;
806
807 switch (type)
808 {
809 case ENCRYPTION_ALGORITHM:
810 map = map_esp_encr;
811 count = countof(map_esp_encr);
812 break;
813 case INTEGRITY_ALGORITHM:
814 if (proto == PROTO_ESP)
815 {
816 map = map_esp_auth;
817 count = countof(map_esp_auth);
818 }
819 else
820 {
821 map = map_ah;
822 count = countof(map_ah);
823 }
824 break;
825 default:
826 return 0;
827 }
828 for (i = 0; i < count; i++)
829 {
830 if (map[i].ikev2 == value)
831 {
832 return map[i].ikev1;
833 }
834 }
835 return 0;
836 }
837 /**
838 * Get IKEv1 authentication attribute from auth_method_t
839 */
840 static u_int16_t get_ikev1_auth(auth_method_t method)
841 {
842 switch (method)
843 {
844 case AUTH_RSA:
845 return IKEV1_AUTH_RSA_SIG;
846 case AUTH_DSS:
847 return IKEV1_AUTH_DSS_SIG;
848 case AUTH_XAUTH_INIT_PSK:
849 return IKEV1_AUTH_XAUTH_INIT_PSK;
850 case AUTH_XAUTH_RESP_PSK:
851 return IKEV1_AUTH_XAUTH_RESP_PSK;
852 case AUTH_XAUTH_INIT_RSA:
853 return IKEV1_AUTH_XAUTH_INIT_RSA;
854 case AUTH_XAUTH_RESP_RSA:
855 return IKEV1_AUTH_XAUTH_RESP_RSA;
856 case AUTH_HYBRID_INIT_RSA:
857 return IKEV1_AUTH_HYBRID_INIT_RSA;
858 case AUTH_HYBRID_RESP_RSA:
859 return IKEV1_AUTH_HYBRID_RESP_RSA;
860 case AUTH_ECDSA_256:
861 return IKEV1_AUTH_ECDSA_256;
862 case AUTH_ECDSA_384:
863 return IKEV1_AUTH_ECDSA_384;
864 case AUTH_ECDSA_521:
865 return IKEV1_AUTH_ECDSA_521;
866 case AUTH_PSK:
867 default:
868 return IKEV1_AUTH_PSK;
869 }
870 }
871
872 /**
873 * Get IKEv1 encapsulation mode
874 */
875 static u_int16_t get_ikev1_mode(ipsec_mode_t mode, encap_t udp)
876 {
877 switch (mode)
878 {
879 case MODE_TUNNEL:
880 switch (udp)
881 {
882 case ENCAP_UDP:
883 return IKEV1_ENCAP_UDP_TUNNEL;
884 case ENCAP_UDP_DRAFT_00_03:
885 return IKEV1_ENCAP_UDP_TUNNEL_DRAFT_00_03;
886 default:
887 return IKEV1_ENCAP_TUNNEL;
888 }
889 case MODE_TRANSPORT:
890 switch (udp)
891 {
892 case ENCAP_UDP:
893 return IKEV1_ENCAP_UDP_TRANSPORT;
894 case ENCAP_UDP_DRAFT_00_03:
895 return IKEV1_ENCAP_UDP_TRANSPORT_DRAFT_00_03;
896 default:
897 return IKEV1_ENCAP_TRANSPORT;
898 }
899 default:
900 return IKEV1_ENCAP_TUNNEL;
901 }
902 }
903
904 /**
905 * Add an IKE transform to a proposal for IKEv1
906 */
907 static void add_to_proposal_v1_ike(proposal_t *proposal,
908 transform_substructure_t *transform)
909 {
910 transform_attribute_type_t type;
911 transform_attribute_t *tattr;
912 enumerator_t *enumerator;
913 u_int16_t value, key_length = 0;
914 u_int16_t encr = ENCR_UNDEFINED;
915
916 enumerator = transform->create_attribute_enumerator(transform);
917 while (enumerator->enumerate(enumerator, &tattr))
918 {
919 type = tattr->get_attribute_type(tattr);
920 value = tattr->get_value(tattr);
921 switch (type)
922 {
923 case TATTR_PH1_ENCRYPTION_ALGORITHM:
924 encr = get_alg_from_ikev1(ENCRYPTION_ALGORITHM, value);
925 break;
926 case TATTR_PH1_KEY_LENGTH:
927 key_length = value;
928 break;
929 case TATTR_PH1_HASH_ALGORITHM:
930 proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM,
931 get_alg_from_ikev1(INTEGRITY_ALGORITHM, value), 0);
932 proposal->add_algorithm(proposal, PSEUDO_RANDOM_FUNCTION,
933 get_alg_from_ikev1(PSEUDO_RANDOM_FUNCTION, value), 0);
934 break;
935 case TATTR_PH1_GROUP:
936 proposal->add_algorithm(proposal, DIFFIE_HELLMAN_GROUP,
937 value, 0);
938 break;
939 default:
940 break;
941 }
942 }
943 enumerator->destroy(enumerator);
944
945 if (encr != ENCR_UNDEFINED)
946 {
947 proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr, key_length);
948 }
949 }
950
951 /**
952 * Add an ESP/AH transform to a proposal for IKEv1
953 */
954 static void add_to_proposal_v1(proposal_t *proposal,
955 transform_substructure_t *transform, protocol_id_t proto)
956 {
957 transform_attribute_type_t type;
958 transform_attribute_t *tattr;
959 enumerator_t *enumerator;
960 u_int16_t encr, value, key_length = 0;
961
962 enumerator = transform->create_attribute_enumerator(transform);
963 while (enumerator->enumerate(enumerator, &tattr))
964 {
965 type = tattr->get_attribute_type(tattr);
966 value = tattr->get_value(tattr);
967 switch (type)
968 {
969 case TATTR_PH2_KEY_LENGTH:
970 key_length = value;
971 break;
972 case TATTR_PH2_AUTH_ALGORITHM:
973 proposal->add_algorithm(proposal, INTEGRITY_ALGORITHM,
974 get_alg_from_ikev1_transid(proto, INTEGRITY_ALGORITHM,
975 value), 0);
976 break;
977 case TATTR_PH2_GROUP:
978 proposal->add_algorithm(proposal, DIFFIE_HELLMAN_GROUP,
979 value, 0);
980 break;
981 default:
982 break;
983 }
984 }
985 enumerator->destroy(enumerator);
986
987 /* TODO-IKEv1: handle ESN attribute */
988 proposal->add_algorithm(proposal, EXTENDED_SEQUENCE_NUMBERS,
989 NO_EXT_SEQ_NUMBERS, 0);
990 if (proto == PROTO_ESP)
991 {
992 encr = get_alg_from_ikev1_transid(proto, ENCRYPTION_ALGORITHM,
993 transform->get_transform_id(transform));
994 if (encr)
995 {
996 proposal->add_algorithm(proposal, ENCRYPTION_ALGORITHM, encr,
997 key_length);
998 }
999 }
1000 }
1001
1002 METHOD(proposal_substructure_t, get_proposals, void,
1003 private_proposal_substructure_t *this, linked_list_t *proposals)
1004 {
1005 transform_substructure_t *transform;
1006 enumerator_t *enumerator;
1007 proposal_t *proposal = NULL;
1008 u_int64_t spi = 0;
1009
1010 switch (this->spi.len)
1011 {
1012 case 4:
1013 spi = *((u_int32_t*)this->spi.ptr);
1014 break;
1015 case 8:
1016 spi = *((u_int64_t*)this->spi.ptr);
1017 break;
1018 default:
1019 break;
1020 }
1021
1022 enumerator = this->transforms->create_enumerator(this->transforms);
1023 while (enumerator->enumerate(enumerator, &transform))
1024 {
1025 if (!proposal)
1026 {
1027 proposal = proposal_create(this->protocol_id, this->proposal_number);
1028 proposal->set_spi(proposal, spi);
1029 proposals->insert_last(proposals, proposal);
1030 }
1031 if (this->type == PLV2_PROPOSAL_SUBSTRUCTURE)
1032 {
1033 add_to_proposal_v2(proposal, transform);
1034 }
1035 else
1036 {
1037 switch (this->protocol_id)
1038 {
1039 case PROTO_IKE:
1040 add_to_proposal_v1_ike(proposal, transform);
1041 break;
1042 case PROTO_ESP:
1043 case PROTO_AH:
1044 add_to_proposal_v1(proposal, transform, this->protocol_id);
1045 break;
1046 default:
1047 break;
1048 }
1049 /* create a new proposal for each transform in IKEv1 */
1050 proposal = NULL;
1051 }
1052 }
1053 enumerator->destroy(enumerator);
1054 }
1055
1056 METHOD(proposal_substructure_t, create_substructure_enumerator, enumerator_t*,
1057 private_proposal_substructure_t *this)
1058 {
1059 return this->transforms->create_enumerator(this->transforms);
1060 }
1061
1062 /**
1063 * Get an attribute from any transform, 0 if not found
1064 */
1065 static u_int64_t get_attr(private_proposal_substructure_t *this,
1066 transform_attribute_type_t type)
1067 {
1068 enumerator_t *transforms, *attributes;
1069 transform_substructure_t *transform;
1070 transform_attribute_t *attr;
1071
1072 transforms = this->transforms->create_enumerator(this->transforms);
1073 while (transforms->enumerate(transforms, &transform))
1074 {
1075 attributes = transform->create_attribute_enumerator(transform);
1076 while (attributes->enumerate(attributes, &attr))
1077 {
1078 if (attr->get_attribute_type(attr) == type)
1079 {
1080 attributes->destroy(attributes);
1081 transforms->destroy(transforms);
1082 return attr->get_value(attr);
1083 }
1084 }
1085 attributes->destroy(attributes);
1086 }
1087 transforms->destroy(transforms);
1088 return 0;
1089 }
1090
1091 /**
1092 * Look up a lifetime duration of a given kind in all transforms
1093 */
1094 static u_int64_t get_life_duration(private_proposal_substructure_t *this,
1095 transform_attribute_type_t type_attr, ikev1_life_type_t type,
1096 transform_attribute_type_t dur_attr)
1097 {
1098 enumerator_t *transforms, *attributes;
1099 transform_substructure_t *transform;
1100 transform_attribute_t *attr;
1101
1102 transforms = this->transforms->create_enumerator(this->transforms);
1103 while (transforms->enumerate(transforms, &transform))
1104 {
1105 attributes = transform->create_attribute_enumerator(transform);
1106 while (attributes->enumerate(attributes, &attr))
1107 {
1108 if (attr->get_attribute_type(attr) == type_attr &&
1109 attr->get_value(attr) == type)
1110 { /* got type attribute, look for duration following next */
1111 while (attributes->enumerate(attributes, &attr))
1112 {
1113 if (attr->get_attribute_type(attr) == dur_attr)
1114 {
1115 attributes->destroy(attributes);
1116 transforms->destroy(transforms);
1117 return attr->get_value(attr);
1118 }
1119 }
1120 }
1121 }
1122 attributes->destroy(attributes);
1123 }
1124 transforms->destroy(transforms);
1125 return 0;
1126 }
1127
1128 METHOD(proposal_substructure_t, get_lifetime, u_int32_t,
1129 private_proposal_substructure_t *this)
1130 {
1131 u_int32_t duration;
1132
1133 switch (this->protocol_id)
1134 {
1135 case PROTO_IKE:
1136 return get_life_duration(this, TATTR_PH1_LIFE_TYPE,
1137 IKEV1_LIFE_TYPE_SECONDS, TATTR_PH1_LIFE_DURATION);
1138 case PROTO_ESP:
1139 case PROTO_AH:
1140 duration = get_life_duration(this, TATTR_PH2_SA_LIFE_TYPE,
1141 IKEV1_LIFE_TYPE_SECONDS, TATTR_PH2_SA_LIFE_DURATION);
1142 if (!duration)
1143 { /* default to 8 hours, RFC 2407 */
1144 return 28800;
1145 }
1146 return duration;
1147 default:
1148 return 0;
1149 }
1150 }
1151
1152 METHOD(proposal_substructure_t, get_lifebytes, u_int64_t,
1153 private_proposal_substructure_t *this)
1154 {
1155 switch (this->protocol_id)
1156 {
1157 case PROTO_ESP:
1158 case PROTO_AH:
1159 return 1000 * get_life_duration(this, TATTR_PH2_SA_LIFE_TYPE,
1160 IKEV1_LIFE_TYPE_KILOBYTES, TATTR_PH2_SA_LIFE_DURATION);
1161 case PROTO_IKE:
1162 default:
1163 return 0;
1164 }
1165 }
1166
1167 METHOD(proposal_substructure_t, get_auth_method, auth_method_t,
1168 private_proposal_substructure_t *this)
1169 {
1170 switch (get_attr(this, TATTR_PH1_AUTH_METHOD))
1171 {
1172 case IKEV1_AUTH_PSK:
1173 return AUTH_PSK;
1174 case IKEV1_AUTH_RSA_SIG:
1175 return AUTH_RSA;
1176 case IKEV1_AUTH_DSS_SIG:
1177 return AUTH_DSS;
1178 case IKEV1_AUTH_XAUTH_INIT_PSK:
1179 return AUTH_XAUTH_INIT_PSK;
1180 case IKEV1_AUTH_XAUTH_RESP_PSK:
1181 return AUTH_XAUTH_RESP_PSK;
1182 case IKEV1_AUTH_XAUTH_INIT_RSA:
1183 return AUTH_XAUTH_INIT_RSA;
1184 case IKEV1_AUTH_XAUTH_RESP_RSA:
1185 return AUTH_XAUTH_RESP_RSA;
1186 case IKEV1_AUTH_HYBRID_INIT_RSA:
1187 return AUTH_HYBRID_INIT_RSA;
1188 case IKEV1_AUTH_HYBRID_RESP_RSA:
1189 return AUTH_HYBRID_RESP_RSA;
1190 case IKEV1_AUTH_ECDSA_256:
1191 return AUTH_ECDSA_256;
1192 case IKEV1_AUTH_ECDSA_384:
1193 return AUTH_ECDSA_384;
1194 case IKEV1_AUTH_ECDSA_521:
1195 return AUTH_ECDSA_521;
1196 default:
1197 return AUTH_NONE;
1198 }
1199 }
1200
1201 METHOD(proposal_substructure_t, get_encap_mode, ipsec_mode_t,
1202 private_proposal_substructure_t *this, bool *udp)
1203 {
1204 *udp = FALSE;
1205 switch (get_attr(this, TATTR_PH2_ENCAP_MODE))
1206 {
1207 case IKEV1_ENCAP_TRANSPORT:
1208 return MODE_TRANSPORT;
1209 case IKEV1_ENCAP_TUNNEL:
1210 return MODE_TUNNEL;
1211 case IKEV1_ENCAP_UDP_TRANSPORT:
1212 case IKEV1_ENCAP_UDP_TRANSPORT_DRAFT_00_03:
1213 *udp = TRUE;
1214 return MODE_TRANSPORT;
1215 case IKEV1_ENCAP_UDP_TUNNEL:
1216 case IKEV1_ENCAP_UDP_TUNNEL_DRAFT_00_03:
1217 *udp = TRUE;
1218 return MODE_TUNNEL;
1219 default:
1220 /* default to TUNNEL, RFC 2407 says implementation specific */
1221 return MODE_TUNNEL;
1222 }
1223 }
1224
1225 METHOD2(payload_t, proposal_substructure_t, destroy, void,
1226 private_proposal_substructure_t *this)
1227 {
1228 this->transforms->destroy_offset(this->transforms,
1229 offsetof(payload_t, destroy));
1230 chunk_free(&this->spi);
1231 free(this);
1232 }
1233
1234 /*
1235 * Described in header.
1236 */
1237 proposal_substructure_t *proposal_substructure_create(payload_type_t type)
1238 {
1239 private_proposal_substructure_t *this;
1240
1241 INIT(this,
1242 .public = {
1243 .payload_interface = {
1244 .verify = _verify,
1245 .get_encoding_rules = _get_encoding_rules,
1246 .get_header_length = _get_header_length,
1247 .get_length = _get_length,
1248 .get_next_type = _get_next_type,
1249 .set_next_type = _set_next_type,
1250 .get_type = _get_type,
1251 .destroy = _destroy,
1252 },
1253 .set_proposal_number = _set_proposal_number,
1254 .get_proposal_number = _get_proposal_number,
1255 .set_protocol_id = _set_protocol_id,
1256 .get_protocol_id = _get_protocol_id,
1257 .set_is_last_proposal = _set_is_last_proposal,
1258 .get_proposals = _get_proposals,
1259 .create_substructure_enumerator = _create_substructure_enumerator,
1260 .set_spi = _set_spi,
1261 .get_spi = _get_spi,
1262 .get_cpi = _get_cpi,
1263 .get_lifetime = _get_lifetime,
1264 .get_lifebytes = _get_lifebytes,
1265 .get_auth_method = _get_auth_method,
1266 .get_encap_mode = _get_encap_mode,
1267 .destroy = _destroy,
1268 },
1269 .next_payload = PL_NONE,
1270 .transforms = linked_list_create(),
1271 .type = type,
1272 );
1273 compute_length(this);
1274
1275 return &this->public;
1276 }
1277
1278 /**
1279 * Add an IKEv1 IKE proposal to the substructure
1280 */
1281 static void set_from_proposal_v1_ike(private_proposal_substructure_t *this,
1282 proposal_t *proposal, u_int32_t lifetime,
1283 auth_method_t method, int number)
1284 {
1285 transform_substructure_t *transform;
1286 u_int16_t alg, key_size;
1287 enumerator_t *enumerator;
1288
1289 transform = transform_substructure_create_type(PLV1_TRANSFORM_SUBSTRUCTURE,
1290 number, IKEV1_TRANSID_KEY_IKE);
1291
1292 enumerator = proposal->create_enumerator(proposal, ENCRYPTION_ALGORITHM);
1293 while (enumerator->enumerate(enumerator, &alg, &key_size))
1294 {
1295 alg = get_ikev1_from_alg(ENCRYPTION_ALGORITHM, alg);
1296 if (alg)
1297 {
1298 transform->add_transform_attribute(transform,
1299 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1300 TATTR_PH1_ENCRYPTION_ALGORITHM, alg));
1301 if (key_size)
1302 {
1303 transform->add_transform_attribute(transform,
1304 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1305 TATTR_PH1_KEY_LENGTH, key_size));
1306 }
1307 break;
1308 }
1309 }
1310 enumerator->destroy(enumerator);
1311
1312 /* encode the integrity algorithm as hash and assume use the same PRF */
1313 enumerator = proposal->create_enumerator(proposal, INTEGRITY_ALGORITHM);
1314 while (enumerator->enumerate(enumerator, &alg, &key_size))
1315 {
1316 alg = get_ikev1_from_alg(INTEGRITY_ALGORITHM, alg);
1317 if (alg)
1318 {
1319 transform->add_transform_attribute(transform,
1320 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1321 TATTR_PH1_HASH_ALGORITHM, alg));
1322 break;
1323 }
1324 }
1325 enumerator->destroy(enumerator);
1326
1327 enumerator = proposal->create_enumerator(proposal, DIFFIE_HELLMAN_GROUP);
1328 if (enumerator->enumerate(enumerator, &alg, &key_size))
1329 {
1330 transform->add_transform_attribute(transform,
1331 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1332 TATTR_PH1_GROUP, alg));
1333 }
1334 enumerator->destroy(enumerator);
1335
1336 transform->add_transform_attribute(transform,
1337 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1338 TATTR_PH1_AUTH_METHOD, get_ikev1_auth(method)));
1339 transform->add_transform_attribute(transform,
1340 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1341 TATTR_PH1_LIFE_TYPE, IKEV1_LIFE_TYPE_SECONDS));
1342 transform->add_transform_attribute(transform,
1343 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1344 TATTR_PH1_LIFE_DURATION, lifetime));
1345
1346 add_transform_substructure(this, transform);
1347 }
1348
1349 /**
1350 * Add an IKEv1 ESP/AH proposal to the substructure
1351 */
1352 static void set_from_proposal_v1(private_proposal_substructure_t *this,
1353 proposal_t *proposal, u_int32_t lifetime, u_int64_t lifebytes,
1354 ipsec_mode_t mode, encap_t udp, int number)
1355 {
1356 transform_substructure_t *transform = NULL;
1357 u_int16_t alg, key_size;
1358 enumerator_t *enumerator;
1359 protocol_id_t proto;
1360
1361 proto = proposal->get_protocol(proposal);
1362 enumerator = proposal->create_enumerator(proposal, ENCRYPTION_ALGORITHM);
1363 if (enumerator->enumerate(enumerator, &alg, &key_size))
1364 {
1365 alg = get_ikev1_transid_from_alg(proto, ENCRYPTION_ALGORITHM, alg);
1366 if (alg)
1367 {
1368 transform = transform_substructure_create_type(
1369 PLV1_TRANSFORM_SUBSTRUCTURE, number, alg);
1370 if (key_size)
1371 {
1372 transform->add_transform_attribute(transform,
1373 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1374 TATTR_PH2_KEY_LENGTH, key_size));
1375 }
1376 }
1377 }
1378 enumerator->destroy(enumerator);
1379
1380 enumerator = proposal->create_enumerator(proposal, INTEGRITY_ALGORITHM);
1381 if (enumerator->enumerate(enumerator, &alg, &key_size))
1382 {
1383 alg = get_ikev1_transid_from_alg(proto, INTEGRITY_ALGORITHM, alg);
1384 if (alg)
1385 {
1386 if (!transform)
1387 {
1388 transform = transform_substructure_create_type(
1389 PLV1_TRANSFORM_SUBSTRUCTURE, number, alg);
1390 }
1391 transform->add_transform_attribute(transform,
1392 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1393 TATTR_PH2_AUTH_ALGORITHM, alg));
1394 }
1395 }
1396 enumerator->destroy(enumerator);
1397
1398 if (!transform)
1399 {
1400 return;
1401 }
1402
1403 enumerator = proposal->create_enumerator(proposal, DIFFIE_HELLMAN_GROUP);
1404 if (enumerator->enumerate(enumerator, &alg, &key_size))
1405 {
1406 transform->add_transform_attribute(transform,
1407 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1408 TATTR_PH2_GROUP, alg));
1409 }
1410 enumerator->destroy(enumerator);
1411
1412 transform->add_transform_attribute(transform,
1413 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1414 TATTR_PH2_ENCAP_MODE, get_ikev1_mode(mode, udp)));
1415 if (lifetime)
1416 {
1417 transform->add_transform_attribute(transform,
1418 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1419 TATTR_PH2_SA_LIFE_TYPE, IKEV1_LIFE_TYPE_SECONDS));
1420 transform->add_transform_attribute(transform,
1421 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1422 TATTR_PH2_SA_LIFE_DURATION, lifetime));
1423 }
1424 if (lifebytes)
1425 {
1426 transform->add_transform_attribute(transform,
1427 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1428 TATTR_PH2_SA_LIFE_TYPE, IKEV1_LIFE_TYPE_KILOBYTES));
1429 transform->add_transform_attribute(transform,
1430 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1431 TATTR_PH2_SA_LIFE_DURATION, lifebytes / 1000));
1432 }
1433
1434 add_transform_substructure(this, transform);
1435 }
1436
1437 /**
1438 * Add an IKEv2 proposal to the substructure
1439 */
1440 static void set_from_proposal_v2(private_proposal_substructure_t *this,
1441 proposal_t *proposal)
1442 {
1443 transform_substructure_t *transform;
1444 u_int16_t alg, key_size;
1445 enumerator_t *enumerator;
1446
1447 /* encryption algorithm is only available in ESP */
1448 enumerator = proposal->create_enumerator(proposal, ENCRYPTION_ALGORITHM);
1449 while (enumerator->enumerate(enumerator, &alg, &key_size))
1450 {
1451 transform = transform_substructure_create_type(PLV2_TRANSFORM_SUBSTRUCTURE,
1452 ENCRYPTION_ALGORITHM, alg);
1453 if (key_size)
1454 {
1455 transform->add_transform_attribute(transform,
1456 transform_attribute_create_value(PLV2_TRANSFORM_ATTRIBUTE,
1457 TATTR_IKEV2_KEY_LENGTH, key_size));
1458 }
1459 add_transform_substructure(this, transform);
1460 }
1461 enumerator->destroy(enumerator);
1462
1463 /* integrity algorithms */
1464 enumerator = proposal->create_enumerator(proposal, INTEGRITY_ALGORITHM);
1465 while (enumerator->enumerate(enumerator, &alg, &key_size))
1466 {
1467 transform = transform_substructure_create_type(PLV2_TRANSFORM_SUBSTRUCTURE,
1468 INTEGRITY_ALGORITHM, alg);
1469 add_transform_substructure(this, transform);
1470 }
1471 enumerator->destroy(enumerator);
1472
1473 /* prf algorithms */
1474 enumerator = proposal->create_enumerator(proposal, PSEUDO_RANDOM_FUNCTION);
1475 while (enumerator->enumerate(enumerator, &alg, &key_size))
1476 {
1477 transform = transform_substructure_create_type(PLV2_TRANSFORM_SUBSTRUCTURE,
1478 PSEUDO_RANDOM_FUNCTION, alg);
1479 add_transform_substructure(this, transform);
1480 }
1481 enumerator->destroy(enumerator);
1482
1483 /* dh groups */
1484 enumerator = proposal->create_enumerator(proposal, DIFFIE_HELLMAN_GROUP);
1485 while (enumerator->enumerate(enumerator, &alg, NULL))
1486 {
1487 transform = transform_substructure_create_type(PLV2_TRANSFORM_SUBSTRUCTURE,
1488 DIFFIE_HELLMAN_GROUP, alg);
1489 add_transform_substructure(this, transform);
1490 }
1491 enumerator->destroy(enumerator);
1492
1493 /* extended sequence numbers */
1494 enumerator = proposal->create_enumerator(proposal, EXTENDED_SEQUENCE_NUMBERS);
1495 while (enumerator->enumerate(enumerator, &alg, NULL))
1496 {
1497 transform = transform_substructure_create_type(PLV2_TRANSFORM_SUBSTRUCTURE,
1498 EXTENDED_SEQUENCE_NUMBERS, alg);
1499 add_transform_substructure(this, transform);
1500 }
1501 enumerator->destroy(enumerator);
1502 }
1503
1504 /**
1505 * Set SPI and other data from proposal, compute length
1506 */
1507 static void set_data(private_proposal_substructure_t *this, proposal_t *proposal)
1508 {
1509 u_int64_t spi64;
1510 u_int32_t spi32;
1511
1512 /* add SPI, if necessary */
1513 switch (proposal->get_protocol(proposal))
1514 {
1515 case PROTO_AH:
1516 case PROTO_ESP:
1517 spi32 = proposal->get_spi(proposal);
1518 this->spi = chunk_clone(chunk_from_thing(spi32));
1519 this->spi_size = this->spi.len;
1520 break;
1521 case PROTO_IKE:
1522 spi64 = proposal->get_spi(proposal);
1523 if (spi64)
1524 { /* IKE only uses SPIS when rekeying, but on initial setup */
1525 this->spi = chunk_clone(chunk_from_thing(spi64));
1526 this->spi_size = this->spi.len;
1527 }
1528 break;
1529 default:
1530 break;
1531 }
1532 this->proposal_number = proposal->get_number(proposal);
1533 this->protocol_id = proposal->get_protocol(proposal);
1534 compute_length(this);
1535 }
1536
1537 /*
1538 * Described in header.
1539 */
1540 proposal_substructure_t *proposal_substructure_create_from_proposal_v2(
1541 proposal_t *proposal)
1542 {
1543 private_proposal_substructure_t *this;
1544
1545 this = (private_proposal_substructure_t*)
1546 proposal_substructure_create(PLV2_SECURITY_ASSOCIATION);
1547 set_from_proposal_v2(this, proposal);
1548 set_data(this, proposal);
1549
1550 return &this->public;
1551 }
1552
1553 /**
1554 * See header.
1555 */
1556 proposal_substructure_t *proposal_substructure_create_from_proposal_v1(
1557 proposal_t *proposal, u_int32_t lifetime, u_int64_t lifebytes,
1558 auth_method_t auth, ipsec_mode_t mode, encap_t udp)
1559 {
1560 private_proposal_substructure_t *this;
1561
1562 this = (private_proposal_substructure_t*)
1563 proposal_substructure_create(PLV1_PROPOSAL_SUBSTRUCTURE);
1564 switch (proposal->get_protocol(proposal))
1565 {
1566 case PROTO_IKE:
1567 set_from_proposal_v1_ike(this, proposal, lifetime, auth, 1);
1568 break;
1569 case PROTO_ESP:
1570 case PROTO_AH:
1571 set_from_proposal_v1(this, proposal, lifetime,
1572 lifebytes, mode, udp, 1);
1573 break;
1574 default:
1575 break;
1576 }
1577 set_data(this, proposal);
1578
1579 return &this->public;
1580 }
1581
1582 /**
1583 * See header.
1584 */
1585 proposal_substructure_t *proposal_substructure_create_from_proposals_v1(
1586 linked_list_t *proposals, u_int32_t lifetime, u_int64_t lifebytes,
1587 auth_method_t auth, ipsec_mode_t mode, encap_t udp)
1588 {
1589 private_proposal_substructure_t *this = NULL;
1590 enumerator_t *enumerator;
1591 proposal_t *proposal;
1592 int number = 0;
1593
1594 enumerator = proposals->create_enumerator(proposals);
1595 while (enumerator->enumerate(enumerator, &proposal))
1596 {
1597 if (!this)
1598 {
1599 this = (private_proposal_substructure_t*)
1600 proposal_substructure_create_from_proposal_v1(
1601 proposal, lifetime, lifebytes, auth, mode, udp);
1602 ++number;
1603 }
1604 else
1605 {
1606 switch (proposal->get_protocol(proposal))
1607 {
1608 case PROTO_IKE:
1609 set_from_proposal_v1_ike(this, proposal, lifetime,
1610 auth, ++number);
1611 break;
1612 case PROTO_ESP:
1613 case PROTO_AH:
1614 set_from_proposal_v1(this, proposal, lifetime,
1615 lifebytes, mode, udp, ++number);
1616 break;
1617 default:
1618 break;
1619 }
1620 }
1621 }
1622 enumerator->destroy(enumerator);
1623
1624 return &this->public;
1625 }
1626
1627 /**
1628 * See header.
1629 */
1630 proposal_substructure_t *proposal_substructure_create_for_ipcomp_v1(
1631 u_int32_t lifetime, u_int64_t lifebytes, u_int16_t cpi,
1632 ipsec_mode_t mode, encap_t udp, u_int8_t proposal_number)
1633 {
1634 private_proposal_substructure_t *this;
1635 transform_substructure_t *transform;
1636
1637
1638 this = (private_proposal_substructure_t*)
1639 proposal_substructure_create(PLV1_PROPOSAL_SUBSTRUCTURE);
1640
1641 /* we currently support DEFLATE only */
1642 transform = transform_substructure_create_type(PLV1_TRANSFORM_SUBSTRUCTURE,
1643 1, IKEV1_IPCOMP_DEFLATE);
1644
1645 transform->add_transform_attribute(transform,
1646 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1647 TATTR_PH2_ENCAP_MODE, get_ikev1_mode(mode, udp)));
1648 if (lifetime)
1649 {
1650 transform->add_transform_attribute(transform,
1651 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1652 TATTR_PH2_SA_LIFE_TYPE, IKEV1_LIFE_TYPE_SECONDS));
1653 transform->add_transform_attribute(transform,
1654 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1655 TATTR_PH2_SA_LIFE_DURATION, lifetime));
1656 }
1657 if (lifebytes)
1658 {
1659 transform->add_transform_attribute(transform,
1660 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1661 TATTR_PH2_SA_LIFE_TYPE, IKEV1_LIFE_TYPE_KILOBYTES));
1662 transform->add_transform_attribute(transform,
1663 transform_attribute_create_value(PLV1_TRANSFORM_ATTRIBUTE,
1664 TATTR_PH2_SA_LIFE_DURATION, lifebytes / 1000));
1665 }
1666
1667 add_transform_substructure(this, transform);
1668
1669 this->spi = chunk_clone(chunk_from_thing(cpi));
1670 this->spi_size = this->spi.len;
1671 this->protocol_id = PROTO_IPCOMP;
1672 this->proposal_number = proposal_number;
1673
1674 compute_length(this);
1675
1676 return &this->public;
1677 }