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1 | /** @file\r | |
2 | The general interfaces of the IKEv2.\r | |
3 | \r | |
4 | Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php.\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include "Utility.h"\r | |
17 | #include "IpSecDebug.h"\r | |
18 | #include "IkeService.h"\r | |
19 | #include "IpSecConfigImpl.h"\r | |
20 | \r | |
21 | /**\r | |
22 | General interface to intialize a IKEv2 negotiation.\r | |
23 | \r | |
24 | @param[in] UdpService Point to Udp Servcie used for the IKE packet sending.\r | |
25 | @param[in] SpdEntry Point to SPD entry related to this IKE negotiation.\r | |
26 | @param[in] PadEntry Point to PAD entry related to this IKE negotiation.\r | |
27 | @param[in] RemoteIp Point to IP Address which the remote peer to negnotiate.\r | |
28 | \r | |
29 | @retval EFI_SUCCESS The operation is successful.\r | |
30 | @retval EFI_OUT_OF_RESOURCES The required system resource can't be allocated.\r | |
31 | @retval EFI_INVALID_PARAMETER If UdpService or RemoteIp is NULL.\r | |
32 | @return Others The operation is failed.\r | |
33 | \r | |
34 | **/\r | |
35 | EFI_STATUS\r | |
36 | Ikev2NegotiateSa (\r | |
37 | IN IKE_UDP_SERVICE *UdpService,\r | |
38 | IN IPSEC_SPD_ENTRY *SpdEntry,\r | |
39 | IN IPSEC_PAD_ENTRY *PadEntry,\r | |
40 | IN EFI_IP_ADDRESS *RemoteIp\r | |
41 | )\r | |
42 | {\r | |
43 | IPSEC_PRIVATE_DATA *Private;\r | |
44 | IKEV2_SA_SESSION *IkeSaSession;\r | |
45 | IKEV2_SESSION_COMMON *SessionCommon;\r | |
46 | IKEV2_PACKET_HANDLER Handler;\r | |
47 | IKE_PACKET *IkePacket;\r | |
48 | EFI_STATUS Status;\r | |
49 | \r | |
50 | if (UdpService == NULL || RemoteIp == NULL) {\r | |
51 | return EFI_INVALID_PARAMETER;\r | |
52 | }\r | |
53 | \r | |
54 | IkePacket = NULL;\r | |
55 | Private = (UdpService->IpVersion == IP_VERSION_4) ?\r | |
56 | IPSEC_PRIVATE_DATA_FROM_UDP4LIST(UdpService->ListHead) :\r | |
57 | IPSEC_PRIVATE_DATA_FROM_UDP6LIST(UdpService->ListHead);\r | |
58 | \r | |
59 | //\r | |
60 | // Lookup the remote ip address in the processing IKE SA session list.\r | |
61 | //\r | |
62 | IkeSaSession = Ikev2SaSessionLookup (&Private->Ikev2SessionList, RemoteIp);\r | |
63 | if (IkeSaSession != NULL) {\r | |
64 | //\r | |
65 | // Drop the packet if already in process.\r | |
66 | //\r | |
67 | return EFI_SUCCESS;\r | |
68 | }\r | |
69 | \r | |
70 | //\r | |
71 | // Create a new IkeSaSession and initiate the common parameters.\r | |
72 | //\r | |
73 | IkeSaSession = Ikev2SaSessionAlloc (Private, UdpService);\r | |
74 | if (IkeSaSession == NULL) {\r | |
75 | return EFI_OUT_OF_RESOURCES;\r | |
76 | }\r | |
77 | \r | |
78 | //\r | |
79 | // Set the specific parameters and state(IKE_STATE_INIT).\r | |
80 | //\r | |
81 | IkeSaSession->Spd = SpdEntry;\r | |
82 | IkeSaSession->Pad = PadEntry;\r | |
83 | SessionCommon = &IkeSaSession->SessionCommon;\r | |
84 | SessionCommon->IsInitiator = TRUE;\r | |
85 | SessionCommon->State = IkeStateInit;\r | |
86 | //\r | |
87 | // TODO: Get the prefer DH Group from the IPsec Configuration, after the IPsecconfig application update\r | |
88 | // to support it.\r | |
89 | //\r | |
90 | SessionCommon->PreferDhGroup = IKEV2_TRANSFORM_ID_DH_1024MODP;\r | |
91 | \r | |
92 | CopyMem (\r | |
93 | &SessionCommon->RemotePeerIp,\r | |
94 | RemoteIp,\r | |
95 | sizeof (EFI_IP_ADDRESS)\r | |
96 | );\r | |
97 | \r | |
98 | CopyMem (\r | |
99 | &SessionCommon->LocalPeerIp,\r | |
100 | &UdpService->DefaultAddress,\r | |
101 | sizeof (EFI_IP_ADDRESS)\r | |
102 | );\r | |
103 | \r | |
104 | IKEV2_DUMP_STATE (SessionCommon->State, IkeStateInit);\r | |
105 | \r | |
106 | //\r | |
107 | // Initiate the SAD data of the IkeSaSession.\r | |
108 | //\r | |
109 | IkeSaSession->SaData = Ikev2InitializeSaData (SessionCommon);\r | |
110 | if (IkeSaSession->SaData == NULL) {\r | |
111 | Status = EFI_OUT_OF_RESOURCES;\r | |
112 | goto ON_ERROR;\r | |
113 | }\r | |
114 | \r | |
115 | //\r | |
116 | // Generate an IKE request packet and send it out.\r | |
117 | //\r | |
118 | Handler = mIkev2Initial[IkeSaSession->Pad->Data->AuthMethod][SessionCommon->State];\r | |
119 | IkePacket = Handler.Generator ((UINT8 *) IkeSaSession, NULL);\r | |
120 | if (IkePacket == NULL) {\r | |
121 | Status = EFI_OUT_OF_RESOURCES;\r | |
122 | goto ON_ERROR;\r | |
123 | }\r | |
124 | \r | |
125 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) SessionCommon, IkePacket, 0);\r | |
126 | \r | |
127 | if (EFI_ERROR (Status)) {\r | |
128 | goto ON_ERROR;\r | |
129 | }\r | |
130 | \r | |
131 | //\r | |
132 | // Insert the current IkeSaSession into the processing IKE SA list.\r | |
133 | //\r | |
134 | Ikev2SaSessionInsert (&Private->Ikev2SessionList, IkeSaSession, RemoteIp);\r | |
135 | \r | |
136 | return EFI_SUCCESS;\r | |
137 | \r | |
138 | ON_ERROR:\r | |
139 | \r | |
140 | if (IkePacket != NULL) {\r | |
141 | IkePacketFree (IkePacket);\r | |
142 | }\r | |
143 | Ikev2SaSessionFree (IkeSaSession);\r | |
144 | return Status;\r | |
145 | }\r | |
146 | \r | |
147 | /**\r | |
148 | It is general interface to negotiate the Child SA.\r | |
149 | \r | |
150 | There are three situations which will invoke this function. First, create a CHILD\r | |
151 | SA if the input Context is NULL. Second, rekeying the existing IKE SA if the Context\r | |
152 | is a IKEv2_SA_SESSION. Third, rekeying the existing CHILD SA if the context is a\r | |
153 | IKEv2_CHILD_SA_SESSION.\r | |
154 | \r | |
155 | @param[in] IkeSaSession Pointer to IKEv2_SA_SESSION related to this operation.\r | |
156 | @param[in] SpdEntry Pointer to IPSEC_SPD_ENTRY related to this operation.\r | |
157 | @param[in] Context The data pass from the caller.\r | |
158 | \r | |
159 | @retval EFI_SUCCESS The operation is successful.\r | |
160 | @retval EFI_OUT_OF_RESOURCES The required system resource can't be allocated.\r | |
161 | @retval EFI_UNSUPPORTED The condition is not support yet.\r | |
162 | @return Others The operation is failed.\r | |
163 | \r | |
164 | **/\r | |
165 | EFI_STATUS\r | |
166 | Ikev2NegotiateChildSa (\r | |
167 | IN UINT8 *IkeSaSession,\r | |
168 | IN IPSEC_SPD_ENTRY *SpdEntry,\r | |
169 | IN UINT8 *Context\r | |
170 | )\r | |
171 | {\r | |
172 | EFI_STATUS Status;\r | |
173 | IKEV2_SA_SESSION *SaSession;\r | |
174 | IKEV2_CHILD_SA_SESSION *ChildSaSession;\r | |
175 | IKEV2_SESSION_COMMON *ChildSaCommon;\r | |
176 | IKE_PACKET *IkePacket;\r | |
177 | IKE_UDP_SERVICE *UdpService;\r | |
178 | \r | |
179 | SaSession = (IKEV2_SA_SESSION*) IkeSaSession;\r | |
180 | UdpService = SaSession->SessionCommon.UdpService;\r | |
181 | IkePacket = NULL;\r | |
182 | \r | |
183 | //\r | |
184 | // 1. Create another child SA session if context is null.\r | |
185 | // 2. Rekeying the IKE SA session if the context is IKE SA session.\r | |
186 | // 3. Rekeying the child SA session if the context is child SA session.\r | |
187 | //\r | |
188 | if (Context == NULL) {\r | |
189 | //\r | |
190 | // Create a new ChildSaSession and initiate the common parameters.\r | |
191 | //\r | |
192 | ChildSaSession = Ikev2ChildSaSessionAlloc (UdpService, SaSession);\r | |
193 | \r | |
194 | if (ChildSaSession == NULL) {\r | |
195 | return EFI_OUT_OF_RESOURCES;\r | |
196 | }\r | |
197 | \r | |
198 | //\r | |
199 | // Set the specific parameters and state as IKE_STATE_CREATE_CHILD.\r | |
200 | //\r | |
201 | ChildSaSession->Spd = SpdEntry;\r | |
202 | ChildSaCommon = &ChildSaSession->SessionCommon;\r | |
203 | ChildSaCommon->IsInitiator = TRUE;\r | |
204 | ChildSaCommon->State = IkeStateCreateChild;\r | |
205 | \r | |
206 | IKEV2_DUMP_STATE (ChildSaCommon->State, IkeStateCreateChild);\r | |
207 | \r | |
208 | if (SpdEntry->Selector->NextLayerProtocol != EFI_IPSEC_ANY_PROTOCOL) {\r | |
209 | ChildSaSession->ProtoId = SpdEntry->Selector->NextLayerProtocol;\r | |
210 | }\r | |
211 | \r | |
212 | if (SpdEntry->Selector->LocalPort != EFI_IPSEC_ANY_PORT) {\r | |
213 | ChildSaSession->LocalPort = SpdEntry->Selector->LocalPort;\r | |
214 | }\r | |
215 | \r | |
216 | if (SpdEntry->Selector->RemotePort != EFI_IPSEC_ANY_PORT) {\r | |
217 | ChildSaSession->RemotePort = SpdEntry->Selector->RemotePort;\r | |
218 | }\r | |
219 | //\r | |
220 | // Initiate the SAD data parameters of the ChildSaSession.\r | |
221 | //\r | |
222 | ChildSaSession->SaData = Ikev2InitializeSaData (ChildSaCommon);\r | |
223 | if (ChildSaSession->SaData == NULL) {\r | |
224 | Status = EFI_OUT_OF_RESOURCES;\r | |
225 | goto ON_ERROR;\r | |
226 | }\r | |
227 | //\r | |
228 | // Generate an IKE request packet and send it out.\r | |
229 | //\r | |
230 | IkePacket = mIkev2CreateChild.Generator ((UINT8 *) ChildSaSession, NULL);\r | |
231 | \r | |
232 | if (IkePacket == NULL) {\r | |
233 | Status = EFI_OUT_OF_RESOURCES;\r | |
234 | goto ON_ERROR;\r | |
235 | }\r | |
236 | \r | |
237 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) ChildSaCommon, IkePacket, 0);\r | |
238 | \r | |
239 | if (EFI_ERROR (Status)) {\r | |
240 | goto ON_ERROR;\r | |
241 | }\r | |
242 | \r | |
243 | //\r | |
244 | // Insert the ChildSaSession into processing child SA list.\r | |
245 | //\r | |
246 | Ikev2ChildSaSessionInsert (&SaSession->ChildSaSessionList, ChildSaSession);\r | |
247 | } else {\r | |
248 | //\r | |
249 | // TODO: Rekeying IkeSaSession or ChildSaSession, NOT support yet.\r | |
250 | //\r | |
251 | // Rekey IkeSa, set IkeSaSession->State and pass over IkeSaSession\r | |
252 | // Rekey ChildSa, set ChildSaSession->State and pass over ChildSaSession\r | |
253 | //\r | |
254 | return EFI_UNSUPPORTED;\r | |
255 | }\r | |
256 | \r | |
257 | return EFI_SUCCESS;\r | |
258 | \r | |
259 | ON_ERROR:\r | |
260 | \r | |
261 | if (ChildSaSession->SaData != NULL) {\r | |
262 | FreePool (ChildSaSession->SaData);\r | |
263 | }\r | |
264 | \r | |
265 | if (ChildSaSession->SessionCommon.TimeoutEvent != NULL) {\r | |
266 | gBS->CloseEvent (ChildSaSession->SessionCommon.TimeoutEvent);\r | |
267 | }\r | |
268 | \r | |
269 | if (IkePacket != NULL) {\r | |
270 | IkePacketFree (IkePacket);\r | |
271 | }\r | |
272 | \r | |
273 | Ikev2ChildSaSessionFree (ChildSaSession);\r | |
274 | return Status;\r | |
275 | }\r | |
276 | \r | |
277 | /**\r | |
278 | It is general interface to start the Information Exchange.\r | |
279 | \r | |
280 | There are three situations which will invoke this function. First, deliver a Delete Information\r | |
281 | to delete the IKE SA if the input Context is NULL and the state of related IkeSaSeesion's is on\r | |
282 | deleting.Second, deliver a Notify Information without the contents if the input Context is NULL.\r | |
283 | Third, deliver a Notify Information if the input Context is not NULL.\r | |
284 | \r | |
285 | @param[in] IkeSaSession Pointer to IKEv2_SA_SESSION related to this operation.\r | |
286 | @param[in] Context Data passed by caller.\r | |
287 | \r | |
288 | @retval EFI_SUCCESS The operation is successful.\r | |
289 | @retval EFI_OUT_OF_RESOURCES The required system resource can't be allocated.\r | |
290 | @retval EFI_UNSUPPORTED The condition is not support yet.\r | |
291 | @return Otherwise The operation is failed.\r | |
292 | \r | |
293 | **/\r | |
294 | EFI_STATUS\r | |
295 | Ikev2NegotiateInfo (\r | |
296 | IN UINT8 *IkeSaSession,\r | |
297 | IN UINT8 *Context\r | |
298 | )\r | |
299 | {\r | |
300 | \r | |
301 | EFI_STATUS Status;\r | |
302 | IKEV2_SA_SESSION *Ikev2SaSession;\r | |
303 | IKEV2_CHILD_SA_SESSION *ChildSaSession;\r | |
304 | IKEV2_SESSION_COMMON *SaCommon;\r | |
305 | IKE_PACKET *IkePacket;\r | |
306 | IKE_UDP_SERVICE *UdpService;\r | |
307 | LIST_ENTRY *Entry;\r | |
308 | LIST_ENTRY *NextEntry;\r | |
309 | \r | |
310 | Ikev2SaSession = (IKEV2_SA_SESSION *) IkeSaSession;\r | |
311 | UdpService = Ikev2SaSession->SessionCommon.UdpService;\r | |
312 | SaCommon = &Ikev2SaSession->SessionCommon;\r | |
313 | IkePacket = NULL;\r | |
314 | Status = EFI_SUCCESS;\r | |
315 | \r | |
316 | //\r | |
317 | // Delete the IKE SA.\r | |
318 | //\r | |
319 | if (Ikev2SaSession->SessionCommon.State == IkeStateSaDeleting && Context == NULL) {\r | |
320 | \r | |
321 | //\r | |
322 | // Generate Information Packet which contains the Delete Payload.\r | |
323 | //\r | |
324 | IkePacket = mIkev2Info.Generator ((UINT8 *) Ikev2SaSession, NULL);\r | |
325 | if (IkePacket == NULL) {\r | |
326 | Status = EFI_OUT_OF_RESOURCES;\r | |
327 | goto ON_ERROR;\r | |
328 | }\r | |
329 | \r | |
330 | //\r | |
331 | // Send out the Packet\r | |
332 | //\r | |
333 | if (UdpService != NULL) {\r | |
334 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) SaCommon, IkePacket, 0);\r | |
335 | \r | |
336 | if (EFI_ERROR (Status)) {\r | |
337 | goto ON_ERROR;\r | |
338 | }\r | |
339 | }\r | |
340 | } else if (!IsListEmpty (&Ikev2SaSession->DeleteSaList)) {\r | |
341 | //\r | |
342 | // Iterate all Deleting Child SAs.\r | |
343 | //\r | |
344 | NET_LIST_FOR_EACH_SAFE (Entry, NextEntry, &Ikev2SaSession->DeleteSaList) {\r | |
345 | ChildSaSession = IKEV2_CHILD_SA_SESSION_BY_DEL_SA (Entry);\r | |
346 | ChildSaSession->SessionCommon.State = IkeStateSaDeleting;\r | |
347 | \r | |
348 | //\r | |
349 | // Generate Information Packet which contains the Child SA Delete Payload.\r | |
350 | //\r | |
351 | IkePacket = mIkev2Info.Generator ((UINT8 *) ChildSaSession, NULL);\r | |
352 | if (IkePacket == NULL) {\r | |
353 | Status = EFI_OUT_OF_RESOURCES;\r | |
354 | goto ON_ERROR;\r | |
355 | }\r | |
356 | \r | |
357 | //\r | |
358 | // Send out the Packet\r | |
359 | //\r | |
360 | if (UdpService != NULL) {\r | |
361 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) &ChildSaSession->SessionCommon, IkePacket, 0);\r | |
362 | \r | |
363 | if (EFI_ERROR (Status)) {\r | |
364 | goto ON_ERROR;\r | |
365 | }\r | |
366 | }\r | |
367 | }\r | |
368 | } else if (Context == NULL) {\r | |
369 | //\r | |
370 | // TODO: Deliver null notification message.\r | |
371 | //\r | |
372 | } else if (Context != NULL) {\r | |
373 | //\r | |
374 | // TODO: Send out the Information Exchange which contains the Notify Payload.\r | |
375 | //\r | |
376 | }\r | |
377 | ON_ERROR:\r | |
378 | if (IkePacket != NULL) {\r | |
379 | IkePacketFree (IkePacket);\r | |
380 | }\r | |
381 | return Status;\r | |
382 | \r | |
383 | }\r | |
384 | \r | |
385 | /**\r | |
386 | The general interface when received a IKEv2 packet for the IKE SA establishing.\r | |
387 | \r | |
388 | This function first find the related IKE SA Session according to the IKE packet's\r | |
389 | remote IP. Then call the corresponding function to handle this IKE packet according\r | |
390 | to the related IKE SA Session's State.\r | |
391 | \r | |
392 | @param[in] UdpService Pointer of related UDP Service.\r | |
393 | @param[in] IkePacket Data passed by caller.\r | |
394 | \r | |
395 | **/\r | |
396 | VOID\r | |
397 | Ikev2HandleSa (\r | |
398 | IN IKE_UDP_SERVICE *UdpService,\r | |
399 | IN IKE_PACKET *IkePacket\r | |
400 | )\r | |
401 | {\r | |
402 | EFI_STATUS Status;\r | |
403 | IKEV2_SA_SESSION *IkeSaSession;\r | |
404 | IKEV2_CHILD_SA_SESSION *ChildSaSession;\r | |
405 | IKEV2_SESSION_COMMON *IkeSaCommon;\r | |
406 | IKEV2_SESSION_COMMON *ChildSaCommon;\r | |
407 | IKEV2_PACKET_HANDLER Handler;\r | |
408 | IKE_PACKET *Reply;\r | |
409 | IPSEC_PAD_ENTRY *PadEntry;\r | |
410 | IPSEC_PRIVATE_DATA *Private;\r | |
411 | BOOLEAN IsNewSession;\r | |
412 | \r | |
413 | Private = (UdpService->IpVersion == IP_VERSION_4) ?\r | |
414 | IPSEC_PRIVATE_DATA_FROM_UDP4LIST(UdpService->ListHead) :\r | |
415 | IPSEC_PRIVATE_DATA_FROM_UDP6LIST(UdpService->ListHead);\r | |
416 | \r | |
417 | ChildSaSession = NULL;\r | |
418 | ChildSaCommon = NULL;\r | |
419 | \r | |
420 | //\r | |
421 | // Lookup the remote ip address in the processing IKE SA session list.\r | |
422 | //\r | |
423 | IkeSaSession = Ikev2SaSessionLookup (&Private->Ikev2SessionList, &IkePacket->RemotePeerIp);\r | |
424 | IsNewSession = FALSE;\r | |
425 | \r | |
426 | if (IkeSaSession == NULL) {\r | |
427 | //\r | |
428 | // Lookup the remote ip address in the pad.\r | |
429 | //\r | |
430 | PadEntry = IpSecLookupPadEntry (UdpService->IpVersion, &IkePacket->RemotePeerIp);\r | |
431 | if (PadEntry == NULL) {\r | |
432 | //\r | |
433 | // Drop the packet if no pad entry matched, this is the request from RFC 4301.\r | |
434 | //\r | |
435 | return ;\r | |
436 | }\r | |
437 | \r | |
438 | //\r | |
439 | // Create a new IkeSaSession and initiate the common parameters.\r | |
440 | //\r | |
441 | IkeSaSession = Ikev2SaSessionAlloc (Private, UdpService);\r | |
442 | if (IkeSaSession == NULL) {\r | |
443 | return;\r | |
444 | }\r | |
445 | IkeSaSession->Pad = PadEntry;\r | |
446 | IkeSaCommon = &IkeSaSession->SessionCommon;\r | |
447 | IkeSaCommon->IsInitiator = FALSE;\r | |
448 | IkeSaCommon->State = IkeStateInit;\r | |
449 | \r | |
450 | IKEV2_DUMP_STATE (IkeSaCommon->State, IkeStateInit);\r | |
451 | \r | |
452 | CopyMem (\r | |
453 | &IkeSaCommon->RemotePeerIp,\r | |
454 | &IkePacket->RemotePeerIp,\r | |
455 | sizeof (EFI_IP_ADDRESS)\r | |
456 | );\r | |
457 | \r | |
458 | CopyMem (\r | |
459 | &IkeSaCommon->LocalPeerIp,\r | |
460 | &UdpService->DefaultAddress,\r | |
461 | sizeof (EFI_IP_ADDRESS)\r | |
462 | );\r | |
463 | \r | |
464 | IsNewSession = TRUE;\r | |
465 | }\r | |
466 | \r | |
467 | //\r | |
468 | // Validate the IKE packet header.\r | |
469 | //\r | |
470 | if (!Ikev2ValidateHeader (IkeSaSession, IkePacket->Header)) {\r | |
471 | //\r | |
472 | // Drop the packet if invalid IKE header.\r | |
473 | //\r | |
474 | goto ON_ERROR;\r | |
475 | }\r | |
476 | \r | |
477 | //\r | |
478 | // Decode all the payloads in the IKE packet.\r | |
479 | //\r | |
480 | IkeSaCommon = &IkeSaSession->SessionCommon;\r | |
481 | Status = Ikev2DecodePacket (IkeSaCommon, IkePacket, IkeSessionTypeIkeSa);\r | |
482 | if (EFI_ERROR (Status)) {\r | |
483 | goto ON_ERROR;\r | |
484 | }\r | |
485 | \r | |
486 | //\r | |
487 | // Try to reate the first ChildSa Session of that IkeSaSession.\r | |
488 | // If the IkeSaSession is responder, here will create the first ChildSaSession.\r | |
489 | //\r | |
490 | if (IkeSaCommon->State == IkeStateAuth && IsListEmpty(&IkeSaSession->ChildSaSessionList)) {\r | |
491 | //\r | |
492 | // Generate a piggyback child SA in IKE_STATE_AUTH state.\r | |
493 | //\r | |
494 | ASSERT (IsListEmpty (&IkeSaSession->ChildSaSessionList) &&\r | |
495 | IsListEmpty (&IkeSaSession->ChildSaEstablishSessionList));\r | |
496 | \r | |
497 | ChildSaSession = Ikev2ChildSaSessionCreate (IkeSaSession, UdpService);\r | |
498 | ChildSaCommon = &ChildSaSession->SessionCommon;\r | |
499 | }\r | |
500 | \r | |
501 | //\r | |
502 | // Parse the IKE request packet according to the auth method and current state.\r | |
503 | //\r | |
504 | Handler = mIkev2Initial[IkeSaSession->Pad->Data->AuthMethod][IkeSaCommon->State];\r | |
505 | Status = Handler.Parser ((UINT8 *)IkeSaSession, IkePacket);\r | |
506 | if (EFI_ERROR (Status)) {\r | |
507 | goto ON_ERROR;\r | |
508 | }\r | |
509 | \r | |
510 | //\r | |
511 | // Try to reate the first ChildSa Session of that IkeSaSession.\r | |
512 | // If the IkeSaSession is initiator, here will create the first ChildSaSession.\r | |
513 | //\r | |
514 | if (IkeSaCommon->State == IkeStateAuth && IsListEmpty(&IkeSaSession->ChildSaSessionList)) {\r | |
515 | //\r | |
516 | // Generate a piggyback child SA in IKE_STATE_AUTH state.\r | |
517 | //\r | |
518 | ASSERT (IsListEmpty (&IkeSaSession->ChildSaSessionList) &&\r | |
519 | IsListEmpty (&IkeSaSession->ChildSaEstablishSessionList));\r | |
520 | \r | |
521 | ChildSaSession = Ikev2ChildSaSessionCreate (IkeSaSession, UdpService);\r | |
522 | ChildSaCommon = &ChildSaSession->SessionCommon;\r | |
523 | \r | |
524 | //\r | |
525 | // Initialize the SA data for Child SA.\r | |
526 | //\r | |
527 | ChildSaSession->SaData = Ikev2InitializeSaData (ChildSaCommon);\r | |
528 | }\r | |
529 | \r | |
530 | //\r | |
531 | // Generate the IKE response packet and send it out if not established.\r | |
532 | //\r | |
533 | if (IkeSaCommon->State != IkeStateIkeSaEstablished) {\r | |
534 | Handler = mIkev2Initial[IkeSaSession->Pad->Data->AuthMethod][IkeSaCommon->State];\r | |
535 | Reply = Handler.Generator ((UINT8 *) IkeSaSession, NULL);\r | |
536 | if (Reply == NULL) {\r | |
537 | goto ON_ERROR;\r | |
538 | }\r | |
539 | \r | |
540 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) IkeSaCommon, Reply, 0);\r | |
541 | if (EFI_ERROR (Status)) {\r | |
542 | goto ON_ERROR;\r | |
543 | }\r | |
544 | if (!IkeSaCommon->IsInitiator) {\r | |
545 | IkeSaCommon->State ++;\r | |
546 | IKEV2_DUMP_STATE (IkeSaCommon->State - 1, IkeSaCommon->State);\r | |
547 | }\r | |
548 | }\r | |
549 | \r | |
550 | //\r | |
551 | // Insert the new IkeSaSession into the Private processing IkeSaSession List.\r | |
552 | //\r | |
553 | if (IsNewSession) {\r | |
554 | Ikev2SaSessionInsert (&Private->Ikev2SessionList, IkeSaSession, &IkePacket->RemotePeerIp);\r | |
555 | }\r | |
556 | \r | |
557 | //\r | |
558 | // Register the IkeSaSession and remove it from processing list.\r | |
559 | //\r | |
560 | if (IkeSaCommon->State == IkeStateIkeSaEstablished) {\r | |
561 | \r | |
562 | //\r | |
563 | // Remove the Established IKE SA Session from the IKE SA Session Negotiating list\r | |
564 | // and insert it into IKE SA Session Established list.\r | |
565 | //\r | |
566 | Ikev2SaSessionRemove (&Private->Ikev2SessionList, &IkePacket->RemotePeerIp);\r | |
567 | Ikev2SaSessionReg (IkeSaSession, Private);\r | |
568 | \r | |
569 | //\r | |
570 | // Remove the Established Child SA Session from the IkeSaSession->ChildSaSessionList\r | |
571 | // ,insert it into IkeSaSession->ChildSaEstablishSessionList and save this Child SA\r | |
572 | // into SAD.\r | |
573 | //\r | |
574 | ChildSaSession = IKEV2_CHILD_SA_SESSION_BY_IKE_SA (IkeSaSession->ChildSaSessionList.BackLink);\r | |
575 | Ikev2ChildSaSessionRemove (\r | |
576 | &IkeSaSession->ChildSaSessionList,\r | |
577 | ChildSaSession->LocalPeerSpi,\r | |
578 | IKEV2_ESTABLISHING_CHILDSA_LIST\r | |
579 | );\r | |
580 | Ikev2ChildSaSessionReg (ChildSaSession, Private);\r | |
581 | }\r | |
582 | \r | |
583 | return ;\r | |
584 | \r | |
585 | ON_ERROR:\r | |
586 | if (ChildSaSession != NULL) {\r | |
587 | //\r | |
588 | // Remove the ChildSa from the list (Established list or Negotiating list).\r | |
589 | //\r | |
590 | RemoveEntryList (&ChildSaSession->ByIkeSa);\r | |
591 | Ikev2ChildSaSessionFree (ChildSaSession);\r | |
592 | }\r | |
593 | \r | |
594 | if (IsNewSession && IkeSaSession != NULL) {\r | |
595 | //\r | |
596 | // Remove the IkeSa from the list (Established list or Negotiating list).\r | |
597 | //\r | |
598 | if ((&IkeSaSession->BySessionTable)->ForwardLink != NULL &&\r | |
599 | !IsListEmpty (&IkeSaSession->BySessionTable\r | |
600 | )){\r | |
601 | RemoveEntryList (&IkeSaSession->BySessionTable);\r | |
602 | }\r | |
603 | Ikev2SaSessionFree (IkeSaSession);\r | |
604 | }\r | |
605 | \r | |
606 | return ;\r | |
607 | }\r | |
608 | \r | |
609 | /**\r | |
610 | \r | |
611 | The general interface when received a IKEv2 packet for the IKE Child SA establishing\r | |
612 | or IKE SA/CHILD SA rekeying.\r | |
613 | \r | |
614 | This function first find the related IKE SA Session according to the IKE packet's\r | |
615 | remote IP. Then call the corresponding function to handle this IKE packet according\r | |
616 | to the related IKE Child Session's State.\r | |
617 | \r | |
618 | @param[in] UdpService Pointer of related UDP Service.\r | |
619 | @param[in] IkePacket Data passed by caller.\r | |
620 | \r | |
621 | **/\r | |
622 | VOID\r | |
623 | Ikev2HandleChildSa (\r | |
624 | IN IKE_UDP_SERVICE *UdpService,\r | |
625 | IN IKE_PACKET *IkePacket\r | |
626 | )\r | |
627 | {\r | |
628 | EFI_STATUS Status;\r | |
629 | IKEV2_SA_SESSION *IkeSaSession;\r | |
630 | IKEV2_CREATE_CHILD_REQUEST_TYPE RequestType;\r | |
631 | IKE_PACKET *Reply;\r | |
632 | IPSEC_PRIVATE_DATA *Private;\r | |
633 | \r | |
634 | Private = (UdpService->IpVersion == IP_VERSION_4) ?\r | |
635 | IPSEC_PRIVATE_DATA_FROM_UDP4LIST(UdpService->ListHead) :\r | |
636 | IPSEC_PRIVATE_DATA_FROM_UDP6LIST(UdpService->ListHead);\r | |
637 | \r | |
638 | Reply = NULL;\r | |
639 | \r | |
640 | //\r | |
641 | // Lookup the remote ip address in the processing IKE SA session list.\r | |
642 | //\r | |
643 | IkeSaSession = Ikev2SaSessionLookup (&Private->Ikev2EstablishedList, &IkePacket->RemotePeerIp);\r | |
644 | \r | |
645 | if (IkeSaSession == NULL) {\r | |
646 | //\r | |
647 | // Drop the packet if no IKE SA associated.\r | |
648 | //\r | |
649 | return ;\r | |
650 | }\r | |
651 | \r | |
652 | //\r | |
653 | // Validate the IKE packet header.\r | |
654 | //\r | |
655 | if (!Ikev2ValidateHeader (IkeSaSession, IkePacket->Header)) {\r | |
656 | //\r | |
657 | // Drop the packet if invalid IKE header.\r | |
658 | //\r | |
659 | return;\r | |
660 | }\r | |
661 | \r | |
662 | //\r | |
663 | // Decode all the payloads in the IKE packet.\r | |
664 | //\r | |
665 | Status = Ikev2DecodePacket (&IkeSaSession->SessionCommon, IkePacket, IkeSessionTypeIkeSa);\r | |
666 | if (EFI_ERROR (Status)) {\r | |
667 | return;\r | |
668 | }\r | |
669 | \r | |
670 | //\r | |
671 | // Get the request type: CreateChildSa/RekeyChildSa/RekeyIkeSa.\r | |
672 | //\r | |
673 | RequestType = Ikev2ChildExchangeRequestType (IkePacket);\r | |
674 | \r | |
675 | switch (RequestType) {\r | |
676 | case IkeRequestTypeCreateChildSa:\r | |
677 | case IkeRequestTypeRekeyChildSa:\r | |
678 | case IkeRequestTypeRekeyIkeSa:\r | |
679 | //\r | |
680 | // Parse the IKE request packet. Not support CREATE_CHILD_SA exchange yet, so\r | |
681 | // only EFI_UNSUPPORTED will be returned and that will trigger a reply with a\r | |
682 | // Notify payload of type NO_ADDITIONAL_SAS.\r | |
683 | //\r | |
684 | Status = mIkev2CreateChild.Parser ((UINT8 *) IkeSaSession, IkePacket);\r | |
685 | if (EFI_ERROR (Status)) {\r | |
686 | goto ON_REPLY;\r | |
687 | }\r | |
688 | \r | |
689 | default:\r | |
690 | //\r | |
691 | // No support.\r | |
692 | //\r | |
693 | return ;\r | |
694 | }\r | |
695 | \r | |
696 | ON_REPLY:\r | |
697 | //\r | |
698 | // Generate the reply packet if needed and send it out.\r | |
699 | //\r | |
700 | if (IkePacket->Header->Flags != IKE_HEADER_FLAGS_RESPOND) {\r | |
701 | Reply = mIkev2CreateChild.Generator ((UINT8 *) IkeSaSession, &IkePacket->Header->MessageId);\r | |
702 | if (Reply != NULL) {\r | |
703 | Status = Ikev2SendIkePacket (UdpService, (UINT8 *) &(IkeSaSession->SessionCommon), Reply, 0);\r | |
704 | if (EFI_ERROR (Status)) {\r | |
705 | //\r | |
706 | // Delete Reply payload.\r | |
707 | //\r | |
708 | if (Reply != NULL) {\r | |
709 | IkePacketFree (Reply);\r | |
710 | }\r | |
711 | }\r | |
712 | }\r | |
713 | }\r | |
714 | return ;\r | |
715 | }\r | |
716 | \r | |
717 | /**\r | |
718 | \r | |
719 | It is general interface to handle IKEv2 information Exchange.\r | |
720 | \r | |
721 | @param[in] UdpService Point to IKE UPD Service related to this information exchange.\r | |
722 | @param[in] IkePacket The IKE packet to be parsed.\r | |
723 | \r | |
724 | **/\r | |
725 | VOID\r | |
726 | Ikev2HandleInfo (\r | |
727 | IN IKE_UDP_SERVICE *UdpService,\r | |
728 | IN IKE_PACKET *IkePacket\r | |
729 | )\r | |
730 | {\r | |
731 | EFI_STATUS Status;\r | |
732 | IKEV2_SESSION_COMMON *SessionCommon;\r | |
733 | IKEV2_SA_SESSION *IkeSaSession;\r | |
734 | IPSEC_PRIVATE_DATA *Private;\r | |
735 | \r | |
736 | Private = (UdpService->IpVersion == IP_VERSION_4) ?\r | |
737 | IPSEC_PRIVATE_DATA_FROM_UDP4LIST(UdpService->ListHead) :\r | |
738 | IPSEC_PRIVATE_DATA_FROM_UDP6LIST(UdpService->ListHead);\r | |
739 | \r | |
740 | //\r | |
741 | // Lookup the remote ip address in the processing IKE SA session list.\r | |
742 | //\r | |
743 | IkeSaSession = Ikev2SaSessionLookup (&Private->Ikev2EstablishedList, &IkePacket->RemotePeerIp);\r | |
744 | \r | |
745 | if (IkeSaSession == NULL) {\r | |
746 | //\r | |
747 | // Drop the packet if no IKE SA associated.\r | |
748 | //\r | |
749 | return ;\r | |
750 | }\r | |
751 | //\r | |
752 | // Validate the IKE packet header.\r | |
753 | //\r | |
754 | if (!Ikev2ValidateHeader (IkeSaSession, IkePacket->Header)) {\r | |
755 | \r | |
756 | //\r | |
757 | // Drop the packet if invalid IKE header.\r | |
758 | //\r | |
759 | return;\r | |
760 | }\r | |
761 | \r | |
762 | SessionCommon = &IkeSaSession->SessionCommon;\r | |
763 | \r | |
764 | //\r | |
765 | // Decode all the payloads in the IKE packet.\r | |
766 | //\r | |
767 | Status = Ikev2DecodePacket (SessionCommon, IkePacket, IkeSessionTypeIkeSa);\r | |
768 | if (EFI_ERROR (Status)) {\r | |
769 | return;\r | |
770 | }\r | |
771 | \r | |
772 | Status = mIkev2Info.Parser ((UINT8 *)IkeSaSession, IkePacket);\r | |
773 | \r | |
774 | if (EFI_ERROR (Status)) {\r | |
775 | //\r | |
776 | // Drop the packet if fail to parse.\r | |
777 | //\r | |
778 | return;\r | |
779 | }\r | |
780 | }\r | |
781 | \r | |
782 | IKE_EXCHANGE_INTERFACE mIkev1Exchange = {\r | |
783 | 1,\r | |
784 | NULL, //Ikev1NegotiateSa\r | |
785 | NULL, //Ikev1NegotiateChildSa\r | |
786 | NULL,\r | |
787 | NULL, //Ikev1HandleSa,\r | |
788 | NULL, //Ikev1HandleChildSa\r | |
789 | NULL, //Ikev1HandleInfo\r | |
790 | };\r | |
791 | \r | |
792 | IKE_EXCHANGE_INTERFACE mIkev2Exchange = {\r | |
793 | 2,\r | |
794 | Ikev2NegotiateSa,\r | |
795 | Ikev2NegotiateChildSa,\r | |
796 | Ikev2NegotiateInfo,\r | |
797 | Ikev2HandleSa,\r | |
798 | Ikev2HandleChildSa,\r | |
799 | Ikev2HandleInfo\r | |
800 | };\r | |
801 | \r |