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1 | /** @file\r | |
2 | The implementation of IPsec.\r | |
3 | \r | |
4 | Copyright (c) 2009 - 2011, 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 "IpSecImpl.h"\r | |
17 | #include "IkeService.h"\r | |
18 | #include "IpSecDebug.h"\r | |
19 | #include "IpSecCryptIo.h"\r | |
20 | #include "IpSecConfigImpl.h"\r | |
21 | \r | |
22 | /**\r | |
23 | Check if the specified Address is the Valid Address Range.\r | |
24 | \r | |
25 | This function checks if the bytes after prefixed length are all Zero in this\r | |
26 | Address. This Address is supposed to point to a range address. That means it\r | |
27 | should gives the correct prefixed address and the bytes outside the prefixed are\r | |
28 | zero.\r | |
29 | \r | |
30 | @param[in] IpVersion The IP version.\r | |
31 | @param[in] Address Points to EFI_IP_ADDRESS to be checked.\r | |
32 | @param[in] PrefixLength The PrefixeLength of this address.\r | |
33 | \r | |
34 | @retval TRUE The address is a vaild address range.\r | |
35 | @retval FALSE The address is not a vaild address range.\r | |
36 | \r | |
37 | **/\r | |
38 | BOOLEAN\r | |
39 | IpSecValidAddressRange (\r | |
40 | IN UINT8 IpVersion,\r | |
41 | IN EFI_IP_ADDRESS *Address,\r | |
42 | IN UINT8 PrefixLength\r | |
43 | )\r | |
44 | {\r | |
45 | UINT8 Div;\r | |
46 | UINT8 Mod;\r | |
47 | UINT8 Mask;\r | |
48 | UINT8 AddrLen;\r | |
49 | UINT8 *Addr;\r | |
50 | EFI_IP_ADDRESS ZeroAddr;\r | |
51 | \r | |
52 | if (PrefixLength == 0) {\r | |
53 | return TRUE;\r | |
54 | }\r | |
55 | \r | |
56 | AddrLen = (UINT8) ((IpVersion == IP_VERSION_4) ? 32 : 128);\r | |
57 | \r | |
58 | if (AddrLen <= PrefixLength) {\r | |
59 | return FALSE;\r | |
60 | }\r | |
61 | \r | |
62 | Div = (UINT8) (PrefixLength / 8);\r | |
63 | Mod = (UINT8) (PrefixLength % 8);\r | |
64 | Addr = (UINT8 *) Address;\r | |
65 | ZeroMem (&ZeroAddr, sizeof (EFI_IP_ADDRESS));\r | |
66 | \r | |
67 | //\r | |
68 | // Check whether the mod part of host scope is zero or not.\r | |
69 | //\r | |
70 | if (Mod > 0) {\r | |
71 | Mask = (UINT8) (0xFF << (8 - Mod));\r | |
72 | \r | |
73 | if ((Addr[Div] | Mask) != Mask) {\r | |
74 | return FALSE;\r | |
75 | }\r | |
76 | \r | |
77 | Div++;\r | |
78 | }\r | |
79 | //\r | |
80 | // Check whether the div part of host scope is zero or not.\r | |
81 | //\r | |
82 | if (CompareMem (\r | |
83 | &Addr[Div],\r | |
84 | &ZeroAddr,\r | |
85 | sizeof (EFI_IP_ADDRESS) - Div\r | |
86 | ) != 0) {\r | |
87 | return FALSE;\r | |
88 | }\r | |
89 | \r | |
90 | return TRUE;\r | |
91 | }\r | |
92 | \r | |
93 | /**\r | |
94 | Extrct the Address Range from a Address.\r | |
95 | \r | |
96 | This function keep the prefix address and zero other part address.\r | |
97 | \r | |
98 | @param[in] Address Point to a specified address.\r | |
99 | @param[in] PrefixLength The prefix length.\r | |
100 | @param[out] Range Contain the return Address Range.\r | |
101 | \r | |
102 | **/\r | |
103 | VOID\r | |
104 | IpSecExtractAddressRange (\r | |
105 | IN EFI_IP_ADDRESS *Address,\r | |
106 | IN UINT8 PrefixLength,\r | |
107 | OUT EFI_IP_ADDRESS *Range\r | |
108 | )\r | |
109 | {\r | |
110 | UINT8 Div;\r | |
111 | UINT8 Mod;\r | |
112 | UINT8 Mask;\r | |
113 | UINT8 *Addr;\r | |
114 | \r | |
115 | if (PrefixLength == 0) {\r | |
116 | return ;\r | |
117 | }\r | |
118 | \r | |
119 | Div = (UINT8) (PrefixLength / 8);\r | |
120 | Mod = (UINT8) (PrefixLength % 8);\r | |
121 | Addr = (UINT8 *) Range;\r | |
122 | \r | |
123 | CopyMem (Range, Address, sizeof (EFI_IP_ADDRESS));\r | |
124 | \r | |
125 | //\r | |
126 | // Zero the mod part of host scope.\r | |
127 | //\r | |
128 | if (Mod > 0) {\r | |
129 | Mask = (UINT8) (0xFF << (8 - Mod));\r | |
130 | Addr[Div] = (UINT8) (Addr[Div] & Mask);\r | |
131 | Div++;\r | |
132 | }\r | |
133 | //\r | |
134 | // Zero the div part of host scope.\r | |
135 | //\r | |
136 | ZeroMem (&Addr[Div], sizeof (EFI_IP_ADDRESS) - Div);\r | |
137 | \r | |
138 | }\r | |
139 | \r | |
140 | /**\r | |
141 | Checks if the IP Address in the address range of AddressInfos specified.\r | |
142 | \r | |
143 | @param[in] IpVersion The IP version.\r | |
144 | @param[in] IpAddr Point to EFI_IP_ADDRESS to be check.\r | |
145 | @param[in] AddressInfo A list of EFI_IP_ADDRESS_INFO that is used to check\r | |
146 | the IP Address is matched.\r | |
147 | @param[in] AddressCount The total numbers of the AddressInfo.\r | |
148 | \r | |
149 | @retval TRUE If the Specified IP Address is in the range of the AddressInfos specified.\r | |
150 | @retval FALSE If the Specified IP Address is not in the range of the AddressInfos specified.\r | |
151 | \r | |
152 | **/\r | |
153 | BOOLEAN\r | |
154 | IpSecMatchIpAddress (\r | |
155 | IN UINT8 IpVersion,\r | |
156 | IN EFI_IP_ADDRESS *IpAddr,\r | |
157 | IN EFI_IP_ADDRESS_INFO *AddressInfo,\r | |
158 | IN UINT32 AddressCount\r | |
159 | )\r | |
160 | {\r | |
161 | EFI_IP_ADDRESS Range;\r | |
162 | UINT32 Index;\r | |
163 | BOOLEAN IsMatch;\r | |
164 | \r | |
165 | IsMatch = FALSE;\r | |
166 | \r | |
167 | for (Index = 0; Index < AddressCount; Index++) {\r | |
168 | //\r | |
169 | // Check whether the target address is in the address range\r | |
170 | // if it's a valid range of address.\r | |
171 | //\r | |
172 | if (IpSecValidAddressRange (\r | |
173 | IpVersion,\r | |
174 | &AddressInfo[Index].Address,\r | |
175 | AddressInfo[Index].PrefixLength\r | |
176 | )) {\r | |
177 | //\r | |
178 | // Get the range of the target address belongs to.\r | |
179 | //\r | |
180 | ZeroMem (&Range, sizeof (EFI_IP_ADDRESS));\r | |
181 | IpSecExtractAddressRange (\r | |
182 | IpAddr,\r | |
183 | AddressInfo[Index].PrefixLength,\r | |
184 | &Range\r | |
185 | );\r | |
186 | \r | |
187 | if (CompareMem (\r | |
188 | &Range,\r | |
189 | &AddressInfo[Index].Address,\r | |
190 | sizeof (EFI_IP_ADDRESS)\r | |
191 | ) == 0) {\r | |
192 | //\r | |
193 | // The target address is in the address range.\r | |
194 | //\r | |
195 | IsMatch = TRUE;\r | |
196 | break;\r | |
197 | }\r | |
198 | }\r | |
199 | \r | |
200 | if (CompareMem (\r | |
201 | IpAddr,\r | |
202 | &AddressInfo[Index].Address,\r | |
203 | sizeof (EFI_IP_ADDRESS)\r | |
204 | ) == 0) {\r | |
205 | //\r | |
206 | // The target address is exact same as the address.\r | |
207 | //\r | |
208 | IsMatch = TRUE;\r | |
209 | break;\r | |
210 | }\r | |
211 | }\r | |
212 | return IsMatch;\r | |
213 | }\r | |
214 | \r | |
215 | /**\r | |
216 | Check if the specified Protocol and Prot is supported by the specified SPD Entry.\r | |
217 | \r | |
218 | This function is the subfunction of IPsecLookUpSpdEntry() that is used to\r | |
219 | check if the sent/received IKE packet has the related SPD entry support.\r | |
220 | \r | |
221 | @param[in] Protocol The Protocol to be checked.\r | |
222 | @param[in] IpPayload Point to IP Payload to be check.\r | |
223 | @param[in] SpdProtocol The Protocol supported by SPD.\r | |
224 | @param[in] SpdLocalPort The Local Port in SPD.\r | |
225 | @param[in] SpdRemotePort The Remote Port in SPD.\r | |
226 | @param[in] IsOutbound Flag to indicate the is for IKE Packet sending or recieving.\r | |
227 | \r | |
228 | @retval TRUE The Protocol and Port are supported by the SPD Entry.\r | |
229 | @retval FALSE The Protocol and Port are not supported by the SPD Entry.\r | |
230 | \r | |
231 | **/\r | |
232 | BOOLEAN\r | |
233 | IpSecMatchNextLayerProtocol (\r | |
234 | IN UINT8 Protocol,\r | |
235 | IN UINT8 *IpPayload,\r | |
236 | IN UINT16 SpdProtocol,\r | |
237 | IN UINT16 SpdLocalPort,\r | |
238 | IN UINT16 SpdRemotePort,\r | |
239 | IN BOOLEAN IsOutbound\r | |
240 | )\r | |
241 | {\r | |
242 | BOOLEAN IsMatch;\r | |
243 | \r | |
244 | if (SpdProtocol == EFI_IPSEC_ANY_PROTOCOL) {\r | |
245 | return TRUE;\r | |
246 | }\r | |
247 | \r | |
248 | IsMatch = FALSE;\r | |
249 | \r | |
250 | if (SpdProtocol == Protocol) {\r | |
251 | switch (Protocol) {\r | |
252 | case EFI_IP_PROTO_UDP:\r | |
253 | case EFI_IP_PROTO_TCP:\r | |
254 | //\r | |
255 | // For udp and tcp, (0, 0) means no need to check local and remote\r | |
256 | // port. The payload is passed from upper level, which means it should\r | |
257 | // be in network order.\r | |
258 | //\r | |
259 | IsMatch = (BOOLEAN) (SpdLocalPort == 0 && SpdRemotePort == 0);\r | |
260 | IsMatch = (BOOLEAN) (IsMatch ||\r | |
261 | (IsOutbound &&\r | |
262 | (BOOLEAN)(\r | |
263 | NTOHS (((EFI_UDP_HEADER *) IpPayload)->SrcPort) == SpdLocalPort &&\r | |
264 | NTOHS (((EFI_UDP_HEADER *) IpPayload)->DstPort) == SpdRemotePort\r | |
265 | )\r | |
266 | ));\r | |
267 | \r | |
268 | IsMatch = (BOOLEAN) (IsMatch ||\r | |
269 | (!IsOutbound &&\r | |
270 | (BOOLEAN)(\r | |
271 | NTOHS (((EFI_UDP_HEADER *) IpPayload)->DstPort) == SpdLocalPort &&\r | |
272 | NTOHS (((EFI_UDP_HEADER *) IpPayload)->SrcPort) == SpdRemotePort\r | |
273 | )\r | |
274 | ));\r | |
275 | break;\r | |
276 | \r | |
277 | case EFI_IP_PROTO_ICMP:\r | |
278 | //\r | |
279 | // For icmpv4, type code is replaced with local port and remote port,\r | |
280 | // and (0, 0) means no need to check.\r | |
281 | //\r | |
282 | IsMatch = (BOOLEAN) (SpdLocalPort == 0 && SpdRemotePort == 0);\r | |
283 | IsMatch = (BOOLEAN) (IsMatch ||\r | |
284 | (BOOLEAN) (((IP4_ICMP_HEAD *) IpPayload)->Type == SpdLocalPort &&\r | |
285 | ((IP4_ICMP_HEAD *) IpPayload)->Code == SpdRemotePort\r | |
286 | )\r | |
287 | );\r | |
288 | break;\r | |
289 | \r | |
290 | case IP6_ICMP:\r | |
291 | //\r | |
292 | // For icmpv6, type code is replaced with local port and remote port,\r | |
293 | // and (0, 0) means no need to check.\r | |
294 | //\r | |
295 | IsMatch = (BOOLEAN) (SpdLocalPort == 0 && SpdRemotePort == 0);\r | |
296 | \r | |
297 | IsMatch = (BOOLEAN) (IsMatch ||\r | |
298 | (BOOLEAN) (((IP6_ICMP_HEAD *) IpPayload)->Type == SpdLocalPort &&\r | |
299 | ((IP6_ICMP_HEAD *) IpPayload)->Code == SpdRemotePort\r | |
300 | )\r | |
301 | );\r | |
302 | break;\r | |
303 | \r | |
304 | default:\r | |
305 | IsMatch = TRUE;\r | |
306 | break;\r | |
307 | }\r | |
308 | }\r | |
309 | \r | |
310 | return IsMatch;\r | |
311 | }\r | |
312 | \r | |
313 | /**\r | |
314 | Find the SAD through a specified SPD's SAD list.\r | |
315 | \r | |
316 | @param[in] SadList SAD list related to a specified SPD entry.\r | |
317 | @param[in] DestAddress The destination address used to find the SAD entry.\r | |
318 | @param[in] IpVersion The IP version. Ip4 or Ip6.\r | |
319 | \r | |
320 | @return The pointer to a certain SAD entry.\r | |
321 | \r | |
322 | **/\r | |
323 | IPSEC_SAD_ENTRY *\r | |
324 | IpSecLookupSadBySpd (\r | |
325 | IN LIST_ENTRY *SadList,\r | |
326 | IN EFI_IP_ADDRESS *DestAddress,\r | |
327 | IN UINT8 IpVersion\r | |
328 | )\r | |
329 | {\r | |
330 | LIST_ENTRY *Entry;\r | |
331 | IPSEC_SAD_ENTRY *SadEntry;\r | |
332 | \r | |
333 | NET_LIST_FOR_EACH (Entry, SadList) {\r | |
334 | \r | |
335 | SadEntry = IPSEC_SAD_ENTRY_FROM_SPD (Entry);\r | |
336 | //\r | |
337 | // Find the right SAD entry which contains the appointed dest address.\r | |
338 | //\r | |
339 | if (IpSecMatchIpAddress (\r | |
340 | IpVersion,\r | |
341 | DestAddress,\r | |
342 | SadEntry->Data->SpdSelector->RemoteAddress,\r | |
343 | SadEntry->Data->SpdSelector->RemoteAddressCount\r | |
344 | )){\r | |
345 | return SadEntry;\r | |
346 | }\r | |
347 | }\r | |
348 | \r | |
349 | return NULL;\r | |
350 | }\r | |
351 | \r | |
352 | /**\r | |
353 | Find the SAD through whole SAD list.\r | |
354 | \r | |
355 | @param[in] Spi The SPI used to search the SAD entry.\r | |
356 | @param[in] DestAddress The destination used to search the SAD entry.\r | |
357 | @param[in] IpVersion The IP version. Ip4 or Ip6.\r | |
358 | \r | |
359 | @return the pointer to a certain SAD entry.\r | |
360 | \r | |
361 | **/\r | |
362 | IPSEC_SAD_ENTRY *\r | |
363 | IpSecLookupSadBySpi (\r | |
364 | IN UINT32 Spi,\r | |
365 | IN EFI_IP_ADDRESS *DestAddress,\r | |
366 | IN UINT8 IpVersion\r | |
367 | )\r | |
368 | {\r | |
369 | LIST_ENTRY *Entry;\r | |
370 | LIST_ENTRY *SadList;\r | |
371 | IPSEC_SAD_ENTRY *SadEntry;\r | |
372 | \r | |
373 | SadList = &mConfigData[IPsecConfigDataTypeSad];\r | |
374 | \r | |
375 | NET_LIST_FOR_EACH (Entry, SadList) {\r | |
376 | \r | |
377 | SadEntry = IPSEC_SAD_ENTRY_FROM_LIST (Entry);\r | |
378 | \r | |
379 | //\r | |
380 | // Find the right SAD entry which contain the appointed spi and dest addr.\r | |
381 | //\r | |
382 | if (SadEntry->Id->Spi == Spi) {\r | |
383 | if (SadEntry->Data->Mode == EfiIPsecTunnel) {\r | |
384 | if (CompareMem (\r | |
385 | &DestAddress,\r | |
386 | &SadEntry->Data->TunnelDestAddress,\r | |
387 | sizeof (EFI_IP_ADDRESS)\r | |
388 | )) {\r | |
389 | return SadEntry;\r | |
390 | }\r | |
391 | } else {\r | |
392 | if (SadEntry->Data->SpdSelector != NULL &&\r | |
393 | IpSecMatchIpAddress (\r | |
394 | IpVersion,\r | |
395 | DestAddress,\r | |
396 | SadEntry->Data->SpdSelector->RemoteAddress,\r | |
397 | SadEntry->Data->SpdSelector->RemoteAddressCount\r | |
398 | )\r | |
399 | ) {\r | |
400 | return SadEntry;\r | |
401 | }\r | |
402 | }\r | |
403 | }\r | |
404 | }\r | |
405 | return NULL;\r | |
406 | }\r | |
407 | \r | |
408 | /**\r | |
409 | Look up if there is existing SAD entry for specified IP packet sending.\r | |
410 | \r | |
411 | This function is called by the IPsecProcess when there is some IP packet needed to\r | |
412 | send out. This function checks if there is an existing SAD entry that can be serviced\r | |
413 | to this IP packet sending. If no existing SAD entry could be used, this\r | |
414 | function will invoke an IPsec Key Exchange Negotiation.\r | |
415 | \r | |
416 | @param[in] Private Points to private data.\r | |
417 | @param[in] NicHandle Points to a NIC handle.\r | |
418 | @param[in] IpVersion The version of IP.\r | |
419 | @param[in] IpHead The IP Header of packet to be sent out.\r | |
420 | @param[in] IpPayload The IP Payload to be sent out.\r | |
421 | @param[in] OldLastHead The Last protocol of the IP packet.\r | |
422 | @param[in] SpdEntry Points to a related SPD entry.\r | |
423 | @param[out] SadEntry Contains the Point of a related SAD entry.\r | |
424 | \r | |
425 | @retval EFI_DEVICE_ERROR One of following conditions is TRUE:\r | |
426 | - If don't find related UDP service.\r | |
427 | - Sequence Number is used up.\r | |
428 | - Extension Sequence Number is used up.\r | |
429 | @retval EFI_NOT_READY No existing SAD entry could be used.\r | |
430 | @retval EFI_SUCCESS Find the related SAD entry.\r | |
431 | \r | |
432 | **/\r | |
433 | EFI_STATUS\r | |
434 | IpSecLookupSadEntry (\r | |
435 | IN IPSEC_PRIVATE_DATA *Private,\r | |
436 | IN EFI_HANDLE NicHandle,\r | |
437 | IN UINT8 IpVersion,\r | |
438 | IN VOID *IpHead,\r | |
439 | IN UINT8 *IpPayload,\r | |
440 | IN UINT8 OldLastHead,\r | |
441 | IN IPSEC_SPD_ENTRY *SpdEntry,\r | |
442 | OUT IPSEC_SAD_ENTRY **SadEntry\r | |
443 | )\r | |
444 | {\r | |
445 | IKE_UDP_SERVICE *UdpService;\r | |
446 | IPSEC_SAD_ENTRY *Entry;\r | |
447 | IPSEC_SAD_DATA *Data;\r | |
448 | EFI_IP_ADDRESS DestIp;\r | |
449 | UINT32 SeqNum32;\r | |
450 | \r | |
451 | *SadEntry = NULL;\r | |
452 | UdpService = IkeLookupUdp (Private, NicHandle, IpVersion);\r | |
453 | \r | |
454 | if (UdpService == NULL) {\r | |
455 | return EFI_DEVICE_ERROR;\r | |
456 | }\r | |
457 | //\r | |
458 | // Parse the destination address from ip header.\r | |
459 | //\r | |
460 | ZeroMem (&DestIp, sizeof (EFI_IP_ADDRESS));\r | |
461 | if (IpVersion == IP_VERSION_4) {\r | |
462 | CopyMem (\r | |
463 | &DestIp,\r | |
464 | &((IP4_HEAD *) IpHead)->Dst,\r | |
465 | sizeof (IP4_ADDR)\r | |
466 | );\r | |
467 | } else {\r | |
468 | CopyMem (\r | |
469 | &DestIp,\r | |
470 | &((EFI_IP6_HEADER *) IpHead)->DestinationAddress,\r | |
471 | sizeof (EFI_IP_ADDRESS)\r | |
472 | );\r | |
473 | }\r | |
474 | \r | |
475 | //\r | |
476 | // Find the SAD entry in the spd.sas list according to the dest address.\r | |
477 | //\r | |
478 | Entry = IpSecLookupSadBySpd (&SpdEntry->Data->Sas, &DestIp, IpVersion);\r | |
479 | \r | |
480 | if (Entry == NULL) {\r | |
481 | if (OldLastHead != IP6_ICMP ||\r | |
482 | (OldLastHead == IP6_ICMP && *IpPayload == ICMP_V6_ECHO_REQUEST)\r | |
483 | ) {\r | |
484 | //\r | |
485 | // Start ike negotiation process except the request packet of ping.\r | |
486 | //\r | |
487 | if (SpdEntry->Data->ProcessingPolicy->Mode == EfiIPsecTunnel) {\r | |
488 | IkeNegotiate (\r | |
489 | UdpService,\r | |
490 | SpdEntry,\r | |
491 | &SpdEntry->Data->ProcessingPolicy->TunnelOption->RemoteTunnelAddress\r | |
492 | );\r | |
493 | } else {\r | |
494 | IkeNegotiate (\r | |
495 | UdpService,\r | |
496 | SpdEntry,\r | |
497 | &DestIp\r | |
498 | );\r | |
499 | }\r | |
500 | \r | |
501 | }\r | |
502 | \r | |
503 | return EFI_NOT_READY;\r | |
504 | }\r | |
505 | \r | |
506 | Data = Entry->Data;\r | |
507 | \r | |
508 | if (!Data->ManualSet) {\r | |
509 | if (Data->ESNEnabled) {\r | |
510 | //\r | |
511 | // Validate the 64bit sn number if 64bit sn enabled.\r | |
512 | //\r | |
513 | if ((UINT64) (Data->SequenceNumber + 1) == 0) {\r | |
514 | //\r | |
515 | // TODO: Re-negotiate SA\r | |
516 | //\r | |
517 | return EFI_DEVICE_ERROR;\r | |
518 | }\r | |
519 | } else {\r | |
520 | //\r | |
521 | // Validate the 32bit sn number if 64bit sn disabled.\r | |
522 | //\r | |
523 | SeqNum32 = (UINT32) Data->SequenceNumber;\r | |
524 | if ((UINT32) (SeqNum32 + 1) == 0) {\r | |
525 | //\r | |
526 | // TODO: Re-negotiate SA\r | |
527 | //\r | |
528 | return EFI_DEVICE_ERROR;\r | |
529 | }\r | |
530 | }\r | |
531 | }\r | |
532 | \r | |
533 | *SadEntry = Entry;\r | |
534 | \r | |
535 | return EFI_SUCCESS;\r | |
536 | }\r | |
537 | \r | |
538 | /**\r | |
539 | Find a PAD entry according to a remote IP address.\r | |
540 | \r | |
541 | @param[in] IpVersion The version of IP.\r | |
542 | @param[in] IpAddr Points to remote IP address.\r | |
543 | \r | |
544 | @return the pointer of related PAD entry.\r | |
545 | \r | |
546 | **/\r | |
547 | IPSEC_PAD_ENTRY *\r | |
548 | IpSecLookupPadEntry (\r | |
549 | IN UINT8 IpVersion,\r | |
550 | IN EFI_IP_ADDRESS *IpAddr\r | |
551 | )\r | |
552 | {\r | |
553 | LIST_ENTRY *PadList;\r | |
554 | LIST_ENTRY *Entry;\r | |
555 | EFI_IP_ADDRESS_INFO *IpAddrInfo;\r | |
556 | IPSEC_PAD_ENTRY *PadEntry;\r | |
557 | \r | |
558 | PadList = &mConfigData[IPsecConfigDataTypePad];\r | |
559 | \r | |
560 | for (Entry = PadList->ForwardLink; Entry != PadList; Entry = Entry->ForwardLink) {\r | |
561 | \r | |
562 | PadEntry = IPSEC_PAD_ENTRY_FROM_LIST (Entry);\r | |
563 | IpAddrInfo = &PadEntry->Id->Id.IpAddress;\r | |
564 | //\r | |
565 | // Find the right pad entry which contain the appointed dest addr.\r | |
566 | //\r | |
567 | if (IpSecMatchIpAddress (IpVersion, IpAddr, IpAddrInfo, 1)) {\r | |
568 | return PadEntry;\r | |
569 | }\r | |
570 | }\r | |
571 | \r | |
572 | return NULL;\r | |
573 | }\r | |
574 | \r | |
575 | /**\r | |
576 | Check if the specified IP packet can be serviced by this SPD entry.\r | |
577 | \r | |
578 | @param[in] SpdEntry Point to SPD entry.\r | |
579 | @param[in] IpVersion Version of IP.\r | |
580 | @param[in] IpHead Point to IP header.\r | |
581 | @param[in] IpPayload Point to IP payload.\r | |
582 | @param[in] Protocol The Last protocol of IP packet.\r | |
583 | @param[in] IsOutbound Traffic direction.\r | |
584 | @param[out] Action The support action of SPD entry.\r | |
585 | \r | |
586 | @retval EFI_SUCCESS Find the related SPD.\r | |
587 | @retval EFI_NOT_FOUND Not find the related SPD entry;\r | |
588 | \r | |
589 | **/\r | |
590 | EFI_STATUS\r | |
591 | IpSecLookupSpdEntry (\r | |
592 | IN IPSEC_SPD_ENTRY *SpdEntry,\r | |
593 | IN UINT8 IpVersion,\r | |
594 | IN VOID *IpHead,\r | |
595 | IN UINT8 *IpPayload,\r | |
596 | IN UINT8 Protocol,\r | |
597 | IN BOOLEAN IsOutbound,\r | |
598 | OUT EFI_IPSEC_ACTION *Action\r | |
599 | )\r | |
600 | {\r | |
601 | EFI_IPSEC_SPD_SELECTOR *SpdSel;\r | |
602 | IP4_HEAD *Ip4;\r | |
603 | EFI_IP6_HEADER *Ip6;\r | |
604 | EFI_IP_ADDRESS SrcAddr;\r | |
605 | EFI_IP_ADDRESS DstAddr;\r | |
606 | BOOLEAN SpdMatch;\r | |
607 | \r | |
608 | ASSERT (SpdEntry != NULL);\r | |
609 | SpdSel = SpdEntry->Selector;\r | |
610 | Ip4 = (IP4_HEAD *) IpHead;\r | |
611 | Ip6 = (EFI_IP6_HEADER *) IpHead;\r | |
612 | \r | |
613 | ZeroMem (&SrcAddr, sizeof (EFI_IP_ADDRESS));\r | |
614 | ZeroMem (&DstAddr, sizeof (EFI_IP_ADDRESS));\r | |
615 | \r | |
616 | //\r | |
617 | // Parse the source and destination address from ip header.\r | |
618 | //\r | |
619 | if (IpVersion == IP_VERSION_4) {\r | |
620 | CopyMem (&SrcAddr, &Ip4->Src, sizeof (IP4_ADDR));\r | |
621 | CopyMem (&DstAddr, &Ip4->Dst, sizeof (IP4_ADDR));\r | |
622 | } else {\r | |
623 | CopyMem (&SrcAddr, &Ip6->SourceAddress, sizeof (EFI_IPv6_ADDRESS));\r | |
624 | CopyMem (&DstAddr, &Ip6->DestinationAddress, sizeof (EFI_IPv6_ADDRESS));\r | |
625 | }\r | |
626 | //\r | |
627 | // Check the local and remote addresses for outbound traffic\r | |
628 | //\r | |
629 | SpdMatch = (BOOLEAN)(IsOutbound &&\r | |
630 | IpSecMatchIpAddress (\r | |
631 | IpVersion,\r | |
632 | &SrcAddr,\r | |
633 | SpdSel->LocalAddress,\r | |
634 | SpdSel->LocalAddressCount\r | |
635 | ) &&\r | |
636 | IpSecMatchIpAddress (\r | |
637 | IpVersion,\r | |
638 | &DstAddr,\r | |
639 | SpdSel->RemoteAddress,\r | |
640 | SpdSel->RemoteAddressCount\r | |
641 | )\r | |
642 | );\r | |
643 | \r | |
644 | //\r | |
645 | // Check the local and remote addresses for inbound traffic\r | |
646 | //\r | |
647 | SpdMatch = (BOOLEAN) (SpdMatch ||\r | |
648 | (!IsOutbound &&\r | |
649 | IpSecMatchIpAddress (\r | |
650 | IpVersion,\r | |
651 | &DstAddr,\r | |
652 | SpdSel->LocalAddress,\r | |
653 | SpdSel->LocalAddressCount\r | |
654 | ) &&\r | |
655 | IpSecMatchIpAddress (\r | |
656 | IpVersion,\r | |
657 | &SrcAddr,\r | |
658 | SpdSel->RemoteAddress,\r | |
659 | SpdSel->RemoteAddressCount\r | |
660 | )\r | |
661 | ));\r | |
662 | \r | |
663 | //\r | |
664 | // Check the next layer protocol and local and remote ports.\r | |
665 | //\r | |
666 | SpdMatch = (BOOLEAN) (SpdMatch &&\r | |
667 | IpSecMatchNextLayerProtocol (\r | |
668 | Protocol,\r | |
669 | IpPayload,\r | |
670 | SpdSel->NextLayerProtocol,\r | |
671 | SpdSel->LocalPort,\r | |
672 | SpdSel->RemotePort,\r | |
673 | IsOutbound\r | |
674 | )\r | |
675 | );\r | |
676 | \r | |
677 | if (SpdMatch) {\r | |
678 | //\r | |
679 | // Find the right SPD entry if match the 5 key elements.\r | |
680 | //\r | |
681 | *Action = SpdEntry->Data->Action;\r | |
682 | return EFI_SUCCESS;\r | |
683 | }\r | |
684 | \r | |
685 | return EFI_NOT_FOUND;\r | |
686 | }\r | |
687 | \r | |
688 | /**\r | |
689 | The call back function of NetbufFromExt.\r | |
690 | \r | |
691 | @param[in] Arg The argument passed from the caller.\r | |
692 | \r | |
693 | **/\r | |
694 | VOID\r | |
695 | EFIAPI\r | |
696 | IpSecOnRecyclePacket (\r | |
697 | IN VOID *Arg\r | |
698 | )\r | |
699 | {\r | |
700 | }\r | |
701 | \r | |
702 | /**\r | |
703 | This is a Notification function. It is called when the related IP6_TXTOKEN_WRAP\r | |
704 | is released.\r | |
705 | \r | |
706 | @param[in] Event The related event.\r | |
707 | @param[in] Context The data passed by the caller.\r | |
708 | \r | |
709 | **/\r | |
710 | VOID\r | |
711 | EFIAPI\r | |
712 | IpSecRecycleCallback (\r | |
713 | IN EFI_EVENT Event,\r | |
714 | IN VOID *Context\r | |
715 | )\r | |
716 | {\r | |
717 | IPSEC_RECYCLE_CONTEXT *RecycleContext;\r | |
718 | \r | |
719 | RecycleContext = (IPSEC_RECYCLE_CONTEXT *) Context;\r | |
720 | \r | |
721 | if (RecycleContext->FragmentTable != NULL) {\r | |
722 | FreePool (RecycleContext->FragmentTable);\r | |
723 | }\r | |
724 | \r | |
725 | if (RecycleContext->PayloadBuffer != NULL) {\r | |
726 | FreePool (RecycleContext->PayloadBuffer);\r | |
727 | }\r | |
728 | \r | |
729 | FreePool (RecycleContext);\r | |
730 | gBS->CloseEvent (Event);\r | |
731 | \r | |
732 | }\r | |
733 | \r | |
734 | /**\r | |
735 | Calculate the extension hader of IP. The return length only doesn't contain\r | |
736 | the fixed IP header length.\r | |
737 | \r | |
738 | @param[in] IpHead Points to an IP head to be calculated.\r | |
739 | @param[in] LastHead Points to the last header of the IP header.\r | |
740 | \r | |
741 | @return The length of the extension header.\r | |
742 | \r | |
743 | **/\r | |
744 | UINT16\r | |
745 | IpSecGetPlainExtHeadSize (\r | |
746 | IN VOID *IpHead,\r | |
747 | IN UINT8 *LastHead\r | |
748 | )\r | |
749 | {\r | |
750 | UINT16 Size;\r | |
751 | \r | |
752 | Size = (UINT16) (LastHead - (UINT8 *) IpHead);\r | |
753 | \r | |
754 | if (Size > sizeof (EFI_IP6_HEADER)) {\r | |
755 | //\r | |
756 | // * (LastHead+1) point the last header's length but not include the first\r | |
757 | // 8 octers, so this formluation add 8 at the end.\r | |
758 | //\r | |
759 | Size = (UINT16) (Size - sizeof (EFI_IP6_HEADER) + *(LastHead + 1) + 8);\r | |
760 | } else {\r | |
761 | Size = 0;\r | |
762 | }\r | |
763 | \r | |
764 | return Size;\r | |
765 | }\r | |
766 | \r | |
767 | /**\r | |
768 | Verify if the Authentication payload is correct.\r | |
769 | \r | |
770 | @param[in] EspBuffer Points to the ESP wrapped buffer.\r | |
771 | @param[in] EspSize The size of the ESP wrapped buffer.\r | |
772 | @param[in] SadEntry The related SAD entry to store the authentication\r | |
773 | algorithm key.\r | |
774 | @param[in] IcvSize The length of ICV.\r | |
775 | \r | |
776 | @retval EFI_SUCCESS The authentication data is correct.\r | |
777 | @retval EFI_ACCESS_DENIED The authentication data is not correct.\r | |
778 | \r | |
779 | **/\r | |
780 | EFI_STATUS\r | |
781 | IpSecEspAuthVerifyPayload (\r | |
782 | IN UINT8 *EspBuffer,\r | |
783 | IN UINTN EspSize,\r | |
784 | IN IPSEC_SAD_ENTRY *SadEntry,\r | |
785 | IN UINTN IcvSize\r | |
786 | )\r | |
787 | {\r | |
788 | EFI_STATUS Status;\r | |
789 | UINTN AuthSize;\r | |
790 | UINT8 IcvBuffer[12];\r | |
791 | HASH_DATA_FRAGMENT HashFragment[1];\r | |
792 | \r | |
793 | //\r | |
794 | // Calculate the size of authentication payload.\r | |
795 | //\r | |
796 | AuthSize = EspSize - IcvSize;\r | |
797 | \r | |
798 | //\r | |
799 | // Calculate the icv buffer and size of the payload.\r | |
800 | //\r | |
801 | HashFragment[0].Data = EspBuffer;\r | |
802 | HashFragment[0].DataSize = AuthSize;\r | |
803 | \r | |
804 | Status = IpSecCryptoIoHmac (\r | |
805 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthAlgoId,\r | |
806 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthKey,\r | |
807 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthKeyLength,\r | |
808 | HashFragment,\r | |
809 | 1,\r | |
810 | IcvBuffer,\r | |
811 | IcvSize\r | |
812 | );\r | |
813 | if (EFI_ERROR (Status)) {\r | |
814 | return Status;\r | |
815 | }\r | |
816 | \r | |
817 | //\r | |
818 | // Compare the calculated icv and the appended original icv.\r | |
819 | //\r | |
820 | if (CompareMem (EspBuffer + AuthSize, IcvBuffer, IcvSize) == 0) {\r | |
821 | return EFI_SUCCESS;\r | |
822 | }\r | |
823 | \r | |
824 | DEBUG ((DEBUG_ERROR, "Error auth verify payload\n"));\r | |
825 | return EFI_ACCESS_DENIED;\r | |
826 | }\r | |
827 | \r | |
828 | /**\r | |
829 | Search the related SAD entry by the input .\r | |
830 | \r | |
831 | @param[in] IpHead The pointer to IP header.\r | |
832 | @param[in] IpVersion The version of IP (IP4 or IP6).\r | |
833 | @param[in] Spi The SPI used to search the related SAD entry.\r | |
834 | \r | |
835 | \r | |
836 | @retval NULL Not find the related SAD entry.\r | |
837 | @retval IPSEC_SAD_ENTRY Return the related SAD entry.\r | |
838 | \r | |
839 | **/\r | |
840 | IPSEC_SAD_ENTRY *\r | |
841 | IpSecFoundSadFromInboundPacket (\r | |
842 | UINT8 *IpHead,\r | |
843 | UINT8 IpVersion,\r | |
844 | UINT32 Spi\r | |
845 | )\r | |
846 | {\r | |
847 | EFI_IP_ADDRESS DestIp;\r | |
848 | \r | |
849 | //\r | |
850 | // Parse destination address from ip header.\r | |
851 | //\r | |
852 | ZeroMem (&DestIp, sizeof (EFI_IP_ADDRESS));\r | |
853 | if (IpVersion == IP_VERSION_4) {\r | |
854 | CopyMem (\r | |
855 | &DestIp,\r | |
856 | &((IP4_HEAD *) IpHead)->Dst,\r | |
857 | sizeof (IP4_ADDR)\r | |
858 | );\r | |
859 | } else {\r | |
860 | CopyMem (\r | |
861 | &DestIp,\r | |
862 | &((EFI_IP6_HEADER *) IpHead)->DestinationAddress,\r | |
863 | sizeof (EFI_IPv6_ADDRESS)\r | |
864 | );\r | |
865 | }\r | |
866 | \r | |
867 | //\r | |
868 | // Lookup SAD entry according to the spi and dest address.\r | |
869 | //\r | |
870 | return IpSecLookupSadBySpi (Spi, &DestIp, IpVersion);\r | |
871 | }\r | |
872 | \r | |
873 | /**\r | |
874 | Validate the IP6 extension header format for both the packets we received\r | |
875 | and that we will transmit.\r | |
876 | \r | |
877 | @param[in] NextHeader The next header field in IPv6 basic header.\r | |
878 | @param[in] ExtHdrs The first bye of the option.\r | |
879 | @param[in] ExtHdrsLen The length of the whole option.\r | |
880 | @param[out] LastHeader The pointer of NextHeader of the last extension\r | |
881 | header processed by IP6.\r | |
882 | @param[out] RealExtsLen The length of extension headers processed by IP6 layer.\r | |
883 | This is an optional parameter that may be NULL.\r | |
884 | \r | |
885 | @retval TRUE The option is properly formated.\r | |
886 | @retval FALSE The option is malformated.\r | |
887 | \r | |
888 | **/\r | |
889 | BOOLEAN\r | |
890 | IpSecIsIp6ExtsValid (\r | |
891 | IN UINT8 *NextHeader,\r | |
892 | IN UINT8 *ExtHdrs,\r | |
893 | IN UINT32 ExtHdrsLen,\r | |
894 | OUT UINT8 **LastHeader,\r | |
895 | OUT UINT32 *RealExtsLen OPTIONAL\r | |
896 | )\r | |
897 | {\r | |
898 | UINT32 Pointer;\r | |
899 | UINT8 *Option;\r | |
900 | UINT8 OptionLen;\r | |
901 | BOOLEAN Flag;\r | |
902 | UINT8 CountD;\r | |
903 | UINT8 CountF;\r | |
904 | UINT8 CountA;\r | |
905 | \r | |
906 | if (RealExtsLen != NULL) {\r | |
907 | *RealExtsLen = 0;\r | |
908 | }\r | |
909 | \r | |
910 | *LastHeader = NextHeader;\r | |
911 | \r | |
912 | if (ExtHdrs == NULL && ExtHdrsLen == 0) {\r | |
913 | return TRUE;\r | |
914 | }\r | |
915 | \r | |
916 | if ((ExtHdrs == NULL && ExtHdrsLen != 0) || (ExtHdrs != NULL && ExtHdrsLen == 0)) {\r | |
917 | return FALSE;\r | |
918 | }\r | |
919 | \r | |
920 | Pointer = 0;\r | |
921 | Flag = FALSE;\r | |
922 | CountD = 0;\r | |
923 | CountF = 0;\r | |
924 | CountA = 0;\r | |
925 | \r | |
926 | while (Pointer <= ExtHdrsLen) {\r | |
927 | \r | |
928 | switch (*NextHeader) {\r | |
929 | case IP6_HOP_BY_HOP:\r | |
930 | if (Pointer != 0) {\r | |
931 | return FALSE;\r | |
932 | }\r | |
933 | \r | |
934 | Flag = TRUE;\r | |
935 | \r | |
936 | //\r | |
937 | // Fall through\r | |
938 | //\r | |
939 | case IP6_DESTINATION:\r | |
940 | if (*NextHeader == IP6_DESTINATION) {\r | |
941 | CountD++;\r | |
942 | }\r | |
943 | \r | |
944 | if (CountD > 2) {\r | |
945 | return FALSE;\r | |
946 | }\r | |
947 | \r | |
948 | NextHeader = ExtHdrs + Pointer;\r | |
949 | \r | |
950 | Pointer++;\r | |
951 | Option = ExtHdrs + Pointer;\r | |
952 | OptionLen = (UINT8) ((*Option + 1) * 8 - 2);\r | |
953 | Option++;\r | |
954 | Pointer++;\r | |
955 | \r | |
956 | Pointer = Pointer + OptionLen;\r | |
957 | break;\r | |
958 | \r | |
959 | case IP6_FRAGMENT:\r | |
960 | if (++CountF > 1) {\r | |
961 | return FALSE;\r | |
962 | }\r | |
963 | //\r | |
964 | // RFC2402, AH header should after fragment header.\r | |
965 | //\r | |
966 | if (CountA > 1) {\r | |
967 | return FALSE;\r | |
968 | }\r | |
969 | \r | |
970 | NextHeader = ExtHdrs + Pointer;\r | |
971 | Pointer = Pointer + 8;\r | |
972 | break;\r | |
973 | \r | |
974 | case IP6_AH:\r | |
975 | if (++CountA > 1) {\r | |
976 | return FALSE;\r | |
977 | }\r | |
978 | \r | |
979 | Option = ExtHdrs + Pointer;\r | |
980 | NextHeader = Option;\r | |
981 | Option++;\r | |
982 | //\r | |
983 | // RFC2402, Payload length is specified in 32-bit words, minus "2".\r | |
984 | //\r | |
985 | OptionLen = (UINT8) ((*Option + 2) * 4);\r | |
986 | Pointer = Pointer + OptionLen;\r | |
987 | break;\r | |
988 | \r | |
989 | default:\r | |
990 | *LastHeader = NextHeader;\r | |
991 | if (RealExtsLen != NULL) {\r | |
992 | *RealExtsLen = Pointer;\r | |
993 | }\r | |
994 | \r | |
995 | return TRUE;\r | |
996 | }\r | |
997 | }\r | |
998 | \r | |
999 | *LastHeader = NextHeader;\r | |
1000 | \r | |
1001 | if (RealExtsLen != NULL) {\r | |
1002 | *RealExtsLen = Pointer;\r | |
1003 | }\r | |
1004 | \r | |
1005 | return TRUE;\r | |
1006 | }\r | |
1007 | \r | |
1008 | /**\r | |
1009 | The actual entry to process the tunnel header and inner header for tunnel mode\r | |
1010 | outbound traffic.\r | |
1011 | \r | |
1012 | This function is the subfunction of IpSecEspInboundPacket(). It change the destination\r | |
1013 | Ip address to the station address and recalculate the uplayyer's checksum.\r | |
1014 | \r | |
1015 | \r | |
1016 | @param[in, out] IpHead Points to the IP header containing the ESP header\r | |
1017 | to be trimed on input, and without ESP header\r | |
1018 | on return.\r | |
1019 | @param[in] IpPayload The decrypted Ip payload. It start from the inner\r | |
1020 | header.\r | |
1021 | @param[in] IpVersion The version of IP.\r | |
1022 | @param[in] SadData Pointer of the relevant SAD.\r | |
1023 | @param[in, out] LastHead The Last Header in IP header on return.\r | |
1024 | \r | |
1025 | **/\r | |
1026 | VOID\r | |
1027 | IpSecTunnelInboundPacket (\r | |
1028 | IN OUT UINT8 *IpHead,\r | |
1029 | IN UINT8 *IpPayload,\r | |
1030 | IN UINT8 IpVersion,\r | |
1031 | IN IPSEC_SAD_DATA *SadData,\r | |
1032 | IN OUT UINT8 *LastHead\r | |
1033 | )\r | |
1034 | {\r | |
1035 | EFI_UDP_HEADER *UdpHeader;\r | |
1036 | TCP_HEAD *TcpHeader;\r | |
1037 | UINT16 *Checksum;\r | |
1038 | UINT16 PseudoChecksum;\r | |
1039 | UINT16 PacketChecksum;\r | |
1040 | UINT32 OptionLen;\r | |
1041 | IP6_ICMP_HEAD *Icmp6Head;\r | |
1042 | \r | |
1043 | Checksum = NULL;\r | |
1044 | \r | |
1045 | if (IpVersion == IP_VERSION_4) {\r | |
1046 | //\r | |
1047 | // Zero OutIP header use this to indicate the input packet is under\r | |
1048 | // IPsec Tunnel protected.\r | |
1049 | //\r | |
1050 | ZeroMem (\r | |
1051 | (IP4_HEAD *)IpHead,\r | |
1052 | sizeof (IP4_HEAD)\r | |
1053 | );\r | |
1054 | CopyMem (\r | |
1055 | &((IP4_HEAD *)IpPayload)->Dst,\r | |
1056 | &SadData->TunnelDestAddress.v4,\r | |
1057 | sizeof (EFI_IPv4_ADDRESS)\r | |
1058 | );\r | |
1059 | \r | |
1060 | //\r | |
1061 | // Recalculate IpHeader Checksum\r | |
1062 | //\r | |
1063 | if (((IP4_HEAD *)(IpPayload))->Checksum != 0 ) {\r | |
1064 | ((IP4_HEAD *)(IpPayload))->Checksum = 0;\r | |
1065 | ((IP4_HEAD *)(IpPayload))->Checksum = (UINT16) (~NetblockChecksum (\r | |
1066 | (UINT8 *)IpPayload,\r | |
1067 | ((IP4_HEAD *)IpPayload)->HeadLen << 2\r | |
1068 | ));\r | |
1069 | \r | |
1070 | \r | |
1071 | }\r | |
1072 | \r | |
1073 | //\r | |
1074 | // Recalcualte PseudoChecksum\r | |
1075 | //\r | |
1076 | switch (((IP4_HEAD *)IpPayload)->Protocol) {\r | |
1077 | case EFI_IP_PROTO_UDP :\r | |
1078 | UdpHeader = (EFI_UDP_HEADER *)((UINT8 *)IpPayload + (((IP4_HEAD *)IpPayload)->HeadLen << 2));\r | |
1079 | Checksum = & UdpHeader->Checksum;\r | |
1080 | *Checksum = 0;\r | |
1081 | break;\r | |
1082 | \r | |
1083 | case EFI_IP_PROTO_TCP:\r | |
1084 | TcpHeader = (TCP_HEAD *) ((UINT8 *)IpPayload + (((IP4_HEAD *)IpPayload)->HeadLen << 2));\r | |
1085 | Checksum = &TcpHeader->Checksum;\r | |
1086 | *Checksum = 0;\r | |
1087 | break;\r | |
1088 | \r | |
1089 | default:\r | |
1090 | break;\r | |
1091 | }\r | |
1092 | PacketChecksum = NetblockChecksum (\r | |
1093 | (UINT8 *)IpPayload + (((IP4_HEAD *)IpPayload)->HeadLen << 2),\r | |
1094 | NTOHS (((IP4_HEAD *)IpPayload)->TotalLen) - (((IP4_HEAD *)IpPayload)->HeadLen << 2)\r | |
1095 | );\r | |
1096 | PseudoChecksum = NetPseudoHeadChecksum (\r | |
1097 | ((IP4_HEAD *)IpPayload)->Src,\r | |
1098 | ((IP4_HEAD *)IpPayload)->Dst,\r | |
1099 | ((IP4_HEAD *)IpPayload)->Protocol,\r | |
1100 | 0\r | |
1101 | );\r | |
1102 | \r | |
1103 | if (Checksum != NULL) {\r | |
1104 | *Checksum = NetAddChecksum (PacketChecksum, PseudoChecksum);\r | |
1105 | *Checksum = (UINT16) ~(NetAddChecksum (*Checksum, HTONS((UINT16)(NTOHS (((IP4_HEAD *)IpPayload)->TotalLen) - (((IP4_HEAD *)IpPayload)->HeadLen << 2)))));\r | |
1106 | }\r | |
1107 | }else {\r | |
1108 | //\r | |
1109 | // Zero OutIP header use this to indicate the input packet is under\r | |
1110 | // IPsec Tunnel protected.\r | |
1111 | //\r | |
1112 | ZeroMem (\r | |
1113 | IpHead,\r | |
1114 | sizeof (EFI_IP6_HEADER)\r | |
1115 | );\r | |
1116 | CopyMem (\r | |
1117 | &((EFI_IP6_HEADER*)IpPayload)->DestinationAddress,\r | |
1118 | &SadData->TunnelDestAddress.v6,\r | |
1119 | sizeof (EFI_IPv6_ADDRESS)\r | |
1120 | );\r | |
1121 | \r | |
1122 | //\r | |
1123 | // Get the Extension Header and Header length.\r | |
1124 | //\r | |
1125 | IpSecIsIp6ExtsValid (\r | |
1126 | &((EFI_IP6_HEADER *)IpPayload)->NextHeader,\r | |
1127 | IpPayload + sizeof (EFI_IP6_HEADER),\r | |
1128 | ((EFI_IP6_HEADER *)IpPayload)->PayloadLength,\r | |
1129 | &LastHead,\r | |
1130 | &OptionLen\r | |
1131 | );\r | |
1132 | \r | |
1133 | //\r | |
1134 | // Recalcualte PseudoChecksum\r | |
1135 | //\r | |
1136 | switch (*LastHead) {\r | |
1137 | case EFI_IP_PROTO_UDP:\r | |
1138 | UdpHeader = (EFI_UDP_HEADER *)((UINT8 *)IpPayload + sizeof (EFI_IP6_HEADER) + OptionLen);\r | |
1139 | Checksum = &UdpHeader->Checksum;\r | |
1140 | *Checksum = 0;\r | |
1141 | break;\r | |
1142 | \r | |
1143 | case EFI_IP_PROTO_TCP:\r | |
1144 | TcpHeader = (TCP_HEAD *)(IpPayload + sizeof (EFI_IP6_HEADER) + OptionLen);\r | |
1145 | Checksum = &TcpHeader->Checksum;\r | |
1146 | *Checksum = 0;\r | |
1147 | break;\r | |
1148 | \r | |
1149 | case IP6_ICMP:\r | |
1150 | Icmp6Head = (IP6_ICMP_HEAD *) (IpPayload + sizeof (EFI_IP6_HEADER) + OptionLen);\r | |
1151 | Checksum = &Icmp6Head->Checksum;\r | |
1152 | *Checksum = 0;\r | |
1153 | break;\r | |
1154 | }\r | |
1155 | PacketChecksum = NetblockChecksum (\r | |
1156 | IpPayload + sizeof (EFI_IP6_HEADER) + OptionLen,\r | |
1157 | NTOHS(((EFI_IP6_HEADER *)IpPayload)->PayloadLength) - OptionLen\r | |
1158 | );\r | |
1159 | PseudoChecksum = NetIp6PseudoHeadChecksum (\r | |
1160 | &((EFI_IP6_HEADER *)IpPayload)->SourceAddress,\r | |
1161 | &((EFI_IP6_HEADER *)IpPayload)->DestinationAddress,\r | |
1162 | *LastHead,\r | |
1163 | 0\r | |
1164 | );\r | |
1165 | \r | |
1166 | if (Checksum != NULL) {\r | |
1167 | *Checksum = NetAddChecksum (PacketChecksum, PseudoChecksum);\r | |
1168 | *Checksum = (UINT16) ~(NetAddChecksum (\r | |
1169 | *Checksum,\r | |
1170 | HTONS ((UINT16)((NTOHS (((EFI_IP6_HEADER *)(IpPayload))->PayloadLength)) - OptionLen))\r | |
1171 | ));\r | |
1172 | }\r | |
1173 | }\r | |
1174 | }\r | |
1175 | \r | |
1176 | /**\r | |
1177 | The actual entry to create inner header for tunnel mode inbound traffic.\r | |
1178 | \r | |
1179 | This function is the subfunction of IpSecEspOutboundPacket(). It create\r | |
1180 | the sending packet by encrypting its payload and inserting ESP header in the orginal\r | |
1181 | IP header, then return the IpHeader and IPsec protected Fragmentable.\r | |
1182 | \r | |
1183 | @param[in, out] IpHead Points to IP header containing the orginal IP header\r | |
1184 | to be processed on input, and inserted ESP header\r | |
1185 | on return.\r | |
1186 | @param[in] IpVersion The version of IP.\r | |
1187 | @param[in] SadData The related SAD data.\r | |
1188 | @param[in, out] LastHead The Last Header in IP header.\r | |
1189 | @param[in] OptionsBuffer Pointer to the options buffer.\r | |
1190 | @param[in] OptionsLength Length of the options buffer.\r | |
1191 | @param[in, out] FragmentTable Pointer to a list of fragments to be protected by\r | |
1192 | IPsec on input, and with IPsec protected\r | |
1193 | on return.\r | |
1194 | @param[in] FragmentCount The number of fragments.\r | |
1195 | \r | |
1196 | @retval EFI_SUCCESS The operation was successful.\r | |
1197 | @retval EFI_OUT_OF_RESOURCES The required system resources can't be allocated.\r | |
1198 | \r | |
1199 | **/\r | |
1200 | UINT8 *\r | |
1201 | IpSecTunnelOutboundPacket (\r | |
1202 | IN OUT UINT8 *IpHead,\r | |
1203 | IN UINT8 IpVersion,\r | |
1204 | IN IPSEC_SAD_DATA *SadData,\r | |
1205 | IN OUT UINT8 *LastHead,\r | |
1206 | IN VOID **OptionsBuffer,\r | |
1207 | IN UINT32 *OptionsLength,\r | |
1208 | IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,\r | |
1209 | IN UINT32 *FragmentCount\r | |
1210 | )\r | |
1211 | {\r | |
1212 | UINT8 *InnerHead;\r | |
1213 | NET_BUF *Packet;\r | |
1214 | UINT16 PacketChecksum;\r | |
1215 | UINT16 *Checksum;\r | |
1216 | UINT16 PseudoChecksum;\r | |
1217 | IP6_ICMP_HEAD *IcmpHead;\r | |
1218 | \r | |
1219 | Checksum = NULL;\r | |
1220 | if (OptionsLength == NULL) {\r | |
1221 | return NULL;\r | |
1222 | }\r | |
1223 | \r | |
1224 | if (IpVersion == IP_VERSION_4) {\r | |
1225 | InnerHead = AllocateZeroPool (sizeof (IP4_HEAD) + *OptionsLength);\r | |
1226 | ASSERT (InnerHead != NULL);\r | |
1227 | CopyMem (\r | |
1228 | InnerHead,\r | |
1229 | IpHead,\r | |
1230 | sizeof (IP4_HEAD)\r | |
1231 | );\r | |
1232 | CopyMem (\r | |
1233 | InnerHead + sizeof (IP4_HEAD),\r | |
1234 | *OptionsBuffer,\r | |
1235 | *OptionsLength\r | |
1236 | );\r | |
1237 | } else {\r | |
1238 | InnerHead = AllocateZeroPool (sizeof (EFI_IP6_HEADER) + *OptionsLength);\r | |
1239 | ASSERT (InnerHead != NULL);\r | |
1240 | CopyMem (\r | |
1241 | InnerHead,\r | |
1242 | IpHead,\r | |
1243 | sizeof (EFI_IP6_HEADER)\r | |
1244 | );\r | |
1245 | CopyMem (\r | |
1246 | InnerHead + sizeof (EFI_IP6_HEADER),\r | |
1247 | *OptionsBuffer,\r | |
1248 | *OptionsLength\r | |
1249 | );\r | |
1250 | }\r | |
1251 | if (OptionsBuffer != NULL) {\r | |
1252 | if (*OptionsLength != 0) {\r | |
1253 | \r | |
1254 | *OptionsBuffer = NULL;\r | |
1255 | *OptionsLength = 0;\r | |
1256 | }\r | |
1257 | }\r | |
1258 | \r | |
1259 | //\r | |
1260 | // 2. Reassamlbe Fragment into Packet\r | |
1261 | //\r | |
1262 | Packet = NetbufFromExt (\r | |
1263 | (NET_FRAGMENT *)(*FragmentTable),\r | |
1264 | *FragmentCount,\r | |
1265 | 0,\r | |
1266 | 0,\r | |
1267 | IpSecOnRecyclePacket,\r | |
1268 | NULL\r | |
1269 | );\r | |
1270 | ASSERT (Packet != NULL);\r | |
1271 | //\r | |
1272 | // 3. Check the Last Header, if it is TCP, UDP or ICMP recalcualate its pesudo\r | |
1273 | // CheckSum.\r | |
1274 | //\r | |
1275 | switch (*LastHead) {\r | |
1276 | case EFI_IP_PROTO_UDP:\r | |
1277 | Packet->Udp = (EFI_UDP_HEADER *) NetbufGetByte (Packet, 0, 0);\r | |
1278 | ASSERT (Packet->Udp != NULL);\r | |
1279 | Checksum = &Packet->Udp->Checksum;\r | |
1280 | *Checksum = 0;\r | |
1281 | break;\r | |
1282 | \r | |
1283 | case EFI_IP_PROTO_TCP:\r | |
1284 | Packet->Tcp = (TCP_HEAD *) NetbufGetByte (Packet, 0, 0);\r | |
1285 | ASSERT (Packet->Tcp != NULL);\r | |
1286 | Checksum = &Packet->Tcp->Checksum;\r | |
1287 | *Checksum = 0;\r | |
1288 | break;\r | |
1289 | \r | |
1290 | case IP6_ICMP:\r | |
1291 | IcmpHead = (IP6_ICMP_HEAD *) NetbufGetByte (Packet, 0, NULL);\r | |
1292 | ASSERT (IcmpHead != NULL);\r | |
1293 | Checksum = &IcmpHead->Checksum;\r | |
1294 | *Checksum = 0;\r | |
1295 | break;\r | |
1296 | \r | |
1297 | default:\r | |
1298 | break;\r | |
1299 | }\r | |
1300 | \r | |
1301 | PacketChecksum = NetbufChecksum (Packet);\r | |
1302 | \r | |
1303 | if (IpVersion == IP_VERSION_4) {\r | |
1304 | //\r | |
1305 | // Replace the source address of Inner Header.\r | |
1306 | //\r | |
1307 | CopyMem (\r | |
1308 | &((IP4_HEAD *)InnerHead)->Src,\r | |
1309 | &SadData->SpdSelector->LocalAddress[0].Address.v4,\r | |
1310 | sizeof (EFI_IPv4_ADDRESS)\r | |
1311 | );\r | |
1312 | \r | |
1313 | PacketChecksum = NetbufChecksum (Packet);\r | |
1314 | PseudoChecksum = NetPseudoHeadChecksum (\r | |
1315 | ((IP4_HEAD *)InnerHead)->Src,\r | |
1316 | ((IP4_HEAD *)InnerHead)->Dst,\r | |
1317 | *LastHead,\r | |
1318 | 0\r | |
1319 | );\r | |
1320 | \r | |
1321 | } else {\r | |
1322 | //\r | |
1323 | // Replace the source address of Inner Header.\r | |
1324 | //\r | |
1325 | CopyMem (\r | |
1326 | &((EFI_IP6_HEADER *)InnerHead)->SourceAddress,\r | |
1327 | &(SadData->SpdSelector->LocalAddress[0].Address.v6),\r | |
1328 | sizeof (EFI_IPv6_ADDRESS)\r | |
1329 | );\r | |
1330 | PacketChecksum = NetbufChecksum (Packet);\r | |
1331 | PseudoChecksum = NetIp6PseudoHeadChecksum (\r | |
1332 | &((EFI_IP6_HEADER *)InnerHead)->SourceAddress,\r | |
1333 | &((EFI_IP6_HEADER *)InnerHead)->DestinationAddress,\r | |
1334 | *LastHead,\r | |
1335 | 0\r | |
1336 | );\r | |
1337 | \r | |
1338 | }\r | |
1339 | if (Checksum != NULL) {\r | |
1340 | *Checksum = NetAddChecksum (PacketChecksum, PseudoChecksum);\r | |
1341 | *Checksum = (UINT16) ~(NetAddChecksum ((UINT16)*Checksum, HTONS ((UINT16) Packet->TotalSize)));\r | |
1342 | }\r | |
1343 | \r | |
1344 | if (Packet != NULL) {\r | |
1345 | NetbufFree (Packet);\r | |
1346 | }\r | |
1347 | return InnerHead;\r | |
1348 | }\r | |
1349 | \r | |
1350 | /**\r | |
1351 | The actual entry to relative function processes the inbound traffic of ESP header.\r | |
1352 | \r | |
1353 | This function is the subfunction of IpSecProtectInboundPacket(). It checks the\r | |
1354 | received packet security property and trim the ESP header and then returns without\r | |
1355 | an IPsec protected IP Header and FramgmentTable.\r | |
1356 | \r | |
1357 | @param[in] IpVersion The version of IP.\r | |
1358 | @param[in, out] IpHead Points to the IP header containing the ESP header\r | |
1359 | to be trimed on input, and without ESP header\r | |
1360 | on return.\r | |
1361 | @param[out] LastHead The Last Header in IP header on return.\r | |
1362 | @param[in, out] OptionsBuffer Pointer to the options buffer.\r | |
1363 | @param[in, out] OptionsLength Length of the options buffer.\r | |
1364 | @param[in, out] FragmentTable Pointer to a list of fragments in the form of IPsec\r | |
1365 | protected on input, and without IPsec protected\r | |
1366 | on return.\r | |
1367 | @param[in, out] FragmentCount The number of fragments.\r | |
1368 | @param[out] SpdSelector Pointer to contain the address of SPD selector on return.\r | |
1369 | @param[out] RecycleEvent The event for recycling of resources.\r | |
1370 | \r | |
1371 | @retval EFI_SUCCESS The operation was successful.\r | |
1372 | @retval EFI_ACCESS_DENIED One or more following conditions is TRUE:\r | |
1373 | - ESP header was not found or mal-format.\r | |
1374 | - The related SAD entry was not found.\r | |
1375 | - The related SAD entry does not support the ESP protocol.\r | |
1376 | @retval EFI_OUT_OF_RESOURCES The required system resource can't be allocated.\r | |
1377 | \r | |
1378 | **/\r | |
1379 | EFI_STATUS\r | |
1380 | IpSecEspInboundPacket (\r | |
1381 | IN UINT8 IpVersion,\r | |
1382 | IN OUT VOID *IpHead,\r | |
1383 | OUT UINT8 *LastHead,\r | |
1384 | IN OUT VOID **OptionsBuffer,\r | |
1385 | IN OUT UINT32 *OptionsLength,\r | |
1386 | IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,\r | |
1387 | IN OUT UINT32 *FragmentCount,\r | |
1388 | OUT EFI_IPSEC_SPD_SELECTOR **SpdSelector,\r | |
1389 | OUT EFI_EVENT *RecycleEvent\r | |
1390 | )\r | |
1391 | {\r | |
1392 | EFI_STATUS Status;\r | |
1393 | NET_BUF *Payload;\r | |
1394 | UINTN EspSize;\r | |
1395 | UINTN IvSize;\r | |
1396 | UINTN BlockSize;\r | |
1397 | UINTN MiscSize;\r | |
1398 | UINTN PlainPayloadSize;\r | |
1399 | UINTN PaddingSize;\r | |
1400 | UINTN IcvSize;\r | |
1401 | UINT8 *ProcessBuffer;\r | |
1402 | EFI_ESP_HEADER *EspHeader;\r | |
1403 | EFI_ESP_TAIL *EspTail;\r | |
1404 | EFI_IPSEC_SA_ID *SaId;\r | |
1405 | IPSEC_SAD_DATA *SadData;\r | |
1406 | IPSEC_SAD_ENTRY *SadEntry;\r | |
1407 | IPSEC_RECYCLE_CONTEXT *RecycleContext;\r | |
1408 | UINT8 NextHeader;\r | |
1409 | UINT16 IpSecHeadSize;\r | |
1410 | UINT8 *InnerHead;\r | |
1411 | \r | |
1412 | Status = EFI_SUCCESS;\r | |
1413 | Payload = NULL;\r | |
1414 | ProcessBuffer = NULL;\r | |
1415 | RecycleContext = NULL;\r | |
1416 | *RecycleEvent = NULL;\r | |
1417 | PlainPayloadSize = 0;\r | |
1418 | NextHeader = 0;\r | |
1419 | \r | |
1420 | //\r | |
1421 | // Build netbuf from fragment table first.\r | |
1422 | //\r | |
1423 | Payload = NetbufFromExt (\r | |
1424 | (NET_FRAGMENT *) *FragmentTable,\r | |
1425 | *FragmentCount,\r | |
1426 | 0,\r | |
1427 | sizeof (EFI_ESP_HEADER),\r | |
1428 | IpSecOnRecyclePacket,\r | |
1429 | NULL\r | |
1430 | );\r | |
1431 | if (Payload == NULL) {\r | |
1432 | Status = EFI_OUT_OF_RESOURCES;\r | |
1433 | goto ON_EXIT;\r | |
1434 | }\r | |
1435 | \r | |
1436 | //\r | |
1437 | // Get the esp size and esp header from netbuf.\r | |
1438 | //\r | |
1439 | EspSize = Payload->TotalSize;\r | |
1440 | EspHeader = (EFI_ESP_HEADER *) NetbufGetByte (Payload, 0, NULL);\r | |
1441 | \r | |
1442 | if (EspHeader == NULL) {\r | |
1443 | Status = EFI_ACCESS_DENIED;\r | |
1444 | goto ON_EXIT;\r | |
1445 | }\r | |
1446 | \r | |
1447 | //\r | |
1448 | // Parse destination address from ip header and found the related SAD Entry.\r | |
1449 | //\r | |
1450 | SadEntry = IpSecFoundSadFromInboundPacket (\r | |
1451 | IpHead,\r | |
1452 | IpVersion,\r | |
1453 | NTOHL (EspHeader->Spi)\r | |
1454 | );\r | |
1455 | \r | |
1456 | if (SadEntry == NULL) {\r | |
1457 | Status = EFI_ACCESS_DENIED;\r | |
1458 | goto ON_EXIT;\r | |
1459 | }\r | |
1460 | \r | |
1461 | SaId = SadEntry->Id;\r | |
1462 | SadData = SadEntry->Data;\r | |
1463 | \r | |
1464 | //\r | |
1465 | // Only support esp protocol currently.\r | |
1466 | //\r | |
1467 | if (SaId->Proto != EfiIPsecESP) {\r | |
1468 | Status = EFI_ACCESS_DENIED;\r | |
1469 | goto ON_EXIT;\r | |
1470 | }\r | |
1471 | \r | |
1472 | if (!SadData->ManualSet) {\r | |
1473 | //\r | |
1474 | // TODO: Check SA lifetime and sequence number\r | |
1475 | //\r | |
1476 | }\r | |
1477 | \r | |
1478 | //\r | |
1479 | // Allocate buffer for decryption and authentication.\r | |
1480 | //\r | |
1481 | ProcessBuffer = AllocateZeroPool (EspSize);\r | |
1482 | if (ProcessBuffer == NULL) {\r | |
1483 | Status = EFI_OUT_OF_RESOURCES;\r | |
1484 | goto ON_EXIT;\r | |
1485 | }\r | |
1486 | \r | |
1487 | NetbufCopy (Payload, 0, (UINT32) EspSize, ProcessBuffer);\r | |
1488 | \r | |
1489 | //\r | |
1490 | // Get the IcvSize for authentication and BlockSize/IvSize for Decryption.\r | |
1491 | //\r | |
1492 | IcvSize = IpSecGetIcvLength (SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthAlgoId);\r | |
1493 | IvSize = IpSecGetEncryptIvLength (SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId);\r | |
1494 | BlockSize = IpSecGetEncryptBlockSize (SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId);\r | |
1495 | \r | |
1496 | //\r | |
1497 | // Make sure the ESP packet is not mal-formt.\r | |
1498 | // 1. Check whether the Espsize is larger than ESP header + IvSize + EspTail + IcvSize.\r | |
1499 | // 2. Check whether the left payload size is multiple of IvSize.\r | |
1500 | //\r | |
1501 | MiscSize = sizeof (EFI_ESP_HEADER) + IvSize + IcvSize;\r | |
1502 | if (EspSize <= (MiscSize + sizeof (EFI_ESP_TAIL))) {\r | |
1503 | Status = EFI_ACCESS_DENIED;\r | |
1504 | goto ON_EXIT;\r | |
1505 | }\r | |
1506 | if ((EspSize - MiscSize) % BlockSize != 0) {\r | |
1507 | Status = EFI_ACCESS_DENIED;\r | |
1508 | goto ON_EXIT;\r | |
1509 | }\r | |
1510 | \r | |
1511 | //\r | |
1512 | // Authenticate the ESP packet.\r | |
1513 | //\r | |
1514 | if (SadData->AlgoInfo.EspAlgoInfo.AuthKey != NULL) {\r | |
1515 | Status = IpSecEspAuthVerifyPayload (\r | |
1516 | ProcessBuffer,\r | |
1517 | EspSize,\r | |
1518 | SadEntry,\r | |
1519 | IcvSize\r | |
1520 | );\r | |
1521 | if (EFI_ERROR (Status)) {\r | |
1522 | goto ON_EXIT;\r | |
1523 | }\r | |
1524 | }\r | |
1525 | //\r | |
1526 | // Decrypt the payload by the SAD entry if it has decrypt key.\r | |
1527 | //\r | |
1528 | if (SadData->AlgoInfo.EspAlgoInfo.EncKey != NULL) {\r | |
1529 | Status = IpSecCryptoIoDecrypt (\r | |
1530 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId,\r | |
1531 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncKey,\r | |
1532 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncKeyLength << 3,\r | |
1533 | ProcessBuffer + sizeof (EFI_ESP_HEADER),\r | |
1534 | ProcessBuffer + sizeof (EFI_ESP_HEADER) + IvSize,\r | |
1535 | EspSize - sizeof (EFI_ESP_HEADER) - IvSize - IcvSize,\r | |
1536 | ProcessBuffer + sizeof (EFI_ESP_HEADER) + IvSize\r | |
1537 | );\r | |
1538 | if (EFI_ERROR (Status)) {\r | |
1539 | goto ON_EXIT;\r | |
1540 | }\r | |
1541 | }\r | |
1542 | \r | |
1543 | //\r | |
1544 | // Parse EspTail and compute the plain payload size.\r | |
1545 | //\r | |
1546 | EspTail = (EFI_ESP_TAIL *) (ProcessBuffer + EspSize - IcvSize - sizeof (EFI_ESP_TAIL));\r | |
1547 | PaddingSize = EspTail->PaddingLength;\r | |
1548 | NextHeader = EspTail->NextHeader;\r | |
1549 | \r | |
1550 | if (EspSize <= (MiscSize + sizeof (EFI_ESP_TAIL) + PaddingSize)) {\r | |
1551 | Status = EFI_ACCESS_DENIED;\r | |
1552 | goto ON_EXIT;\r | |
1553 | }\r | |
1554 | PlainPayloadSize = EspSize - MiscSize - sizeof (EFI_ESP_TAIL) - PaddingSize;\r | |
1555 | \r | |
1556 | //\r | |
1557 | // TODO: handle anti-replay window\r | |
1558 | //\r | |
1559 | //\r | |
1560 | // Decryption and authentication with esp has been done, so it's time to\r | |
1561 | // reload the new packet, create recycle event and fixup ip header.\r | |
1562 | //\r | |
1563 | RecycleContext = AllocateZeroPool (sizeof (IPSEC_RECYCLE_CONTEXT));\r | |
1564 | if (RecycleContext == NULL) {\r | |
1565 | Status = EFI_OUT_OF_RESOURCES;\r | |
1566 | goto ON_EXIT;\r | |
1567 | }\r | |
1568 | \r | |
1569 | Status = gBS->CreateEvent (\r | |
1570 | EVT_NOTIFY_SIGNAL,\r | |
1571 | TPL_NOTIFY,\r | |
1572 | IpSecRecycleCallback,\r | |
1573 | RecycleContext,\r | |
1574 | RecycleEvent\r | |
1575 | );\r | |
1576 | if (EFI_ERROR (Status)) {\r | |
1577 | goto ON_EXIT;\r | |
1578 | }\r | |
1579 | \r | |
1580 | //\r | |
1581 | // The caller will take responsible to handle the original fragment table\r | |
1582 | //\r | |
1583 | *FragmentTable = AllocateZeroPool (sizeof (EFI_IPSEC_FRAGMENT_DATA));\r | |
1584 | if (*FragmentTable == NULL) {\r | |
1585 | Status = EFI_OUT_OF_RESOURCES;\r | |
1586 | goto ON_EXIT;\r | |
1587 | }\r | |
1588 | \r | |
1589 | RecycleContext->PayloadBuffer = ProcessBuffer;\r | |
1590 | RecycleContext->FragmentTable = *FragmentTable;\r | |
1591 | \r | |
1592 | //\r | |
1593 | // If Tunnel, recalculate upper-layyer PesudoCheckSum and trim the out\r | |
1594 | //\r | |
1595 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
1596 | InnerHead = ProcessBuffer + sizeof (EFI_ESP_HEADER) + IvSize;\r | |
1597 | IpSecTunnelInboundPacket (\r | |
1598 | IpHead,\r | |
1599 | InnerHead,\r | |
1600 | IpVersion,\r | |
1601 | SadData,\r | |
1602 | LastHead\r | |
1603 | );\r | |
1604 | \r | |
1605 | if (IpVersion == IP_VERSION_4) {\r | |
1606 | (*FragmentTable)[0].FragmentBuffer = InnerHead ;\r | |
1607 | (*FragmentTable)[0].FragmentLength = (UINT32) PlainPayloadSize;\r | |
1608 | \r | |
1609 | }else {\r | |
1610 | (*FragmentTable)[0].FragmentBuffer = InnerHead;\r | |
1611 | (*FragmentTable)[0].FragmentLength = (UINT32) PlainPayloadSize;\r | |
1612 | }\r | |
1613 | } else {\r | |
1614 | (*FragmentTable)[0].FragmentBuffer = ProcessBuffer + sizeof (EFI_ESP_HEADER) + IvSize;\r | |
1615 | (*FragmentTable)[0].FragmentLength = (UINT32) PlainPayloadSize;\r | |
1616 | }\r | |
1617 | \r | |
1618 | *FragmentCount = 1;\r | |
1619 | \r | |
1620 | //\r | |
1621 | // Update the total length field in ip header since processed by esp.\r | |
1622 | //\r | |
1623 | if (!SadData->Mode == EfiIPsecTunnel) {\r | |
1624 | if (IpVersion == IP_VERSION_4) {\r | |
1625 | ((IP4_HEAD *) IpHead)->TotalLen = HTONS ((UINT16) ((((IP4_HEAD *) IpHead)->HeadLen << 2) + PlainPayloadSize));\r | |
1626 | } else {\r | |
1627 | IpSecHeadSize = IpSecGetPlainExtHeadSize (IpHead, LastHead);\r | |
1628 | ((EFI_IP6_HEADER *) IpHead)->PayloadLength = HTONS ((UINT16)(IpSecHeadSize + PlainPayloadSize));\r | |
1629 | }\r | |
1630 | //\r | |
1631 | // Update the next layer field in ip header since esp header inserted.\r | |
1632 | //\r | |
1633 | *LastHead = NextHeader;\r | |
1634 | }\r | |
1635 | \r | |
1636 | \r | |
1637 | //\r | |
1638 | // Update the SPD association of the SAD entry.\r | |
1639 | //\r | |
1640 | *SpdSelector = SadData->SpdSelector;\r | |
1641 | \r | |
1642 | ON_EXIT:\r | |
1643 | if (Payload != NULL) {\r | |
1644 | NetbufFree (Payload);\r | |
1645 | }\r | |
1646 | \r | |
1647 | if (EFI_ERROR (Status)) {\r | |
1648 | if (ProcessBuffer != NULL) {\r | |
1649 | FreePool (ProcessBuffer);\r | |
1650 | }\r | |
1651 | \r | |
1652 | if (RecycleContext != NULL) {\r | |
1653 | FreePool (RecycleContext);\r | |
1654 | }\r | |
1655 | \r | |
1656 | if (*RecycleEvent != NULL) {\r | |
1657 | gBS->CloseEvent (*RecycleEvent);\r | |
1658 | }\r | |
1659 | }\r | |
1660 | \r | |
1661 | return Status;\r | |
1662 | }\r | |
1663 | \r | |
1664 | /**\r | |
1665 | The actual entry to the relative function processes the output traffic using the ESP protocol.\r | |
1666 | \r | |
1667 | This function is the subfunction of IpSecProtectOutboundPacket(). It protected\r | |
1668 | the sending packet by encrypting its payload and inserting ESP header in the orginal\r | |
1669 | IP header, then return the IpHeader and IPsec protected Fragmentable.\r | |
1670 | \r | |
1671 | @param[in] IpVersion The version of IP.\r | |
1672 | @param[in, out] IpHead Points to IP header containing the orginal IP header\r | |
1673 | to be processed on input, and inserted ESP header\r | |
1674 | on return.\r | |
1675 | @param[in, out] LastHead The Last Header in IP header.\r | |
1676 | @param[in, out] OptionsBuffer Pointer to the options buffer.\r | |
1677 | @param[in, out] OptionsLength Length of the options buffer.\r | |
1678 | @param[in, out] FragmentTable Pointer to a list of fragments to be protected by\r | |
1679 | IPsec on input, and with IPsec protected\r | |
1680 | on return.\r | |
1681 | @param[in, out] FragmentCount The number of fragments.\r | |
1682 | @param[in] SadEntry The related SAD entry.\r | |
1683 | @param[out] RecycleEvent The event for recycling of resources.\r | |
1684 | \r | |
1685 | @retval EFI_SUCCESS The operation was successful.\r | |
1686 | @retval EFI_OUT_OF_RESOURCES The required system resources can't be allocated.\r | |
1687 | \r | |
1688 | **/\r | |
1689 | EFI_STATUS\r | |
1690 | IpSecEspOutboundPacket (\r | |
1691 | IN UINT8 IpVersion,\r | |
1692 | IN OUT VOID *IpHead,\r | |
1693 | IN OUT UINT8 *LastHead,\r | |
1694 | IN OUT VOID **OptionsBuffer,\r | |
1695 | IN OUT UINT32 *OptionsLength,\r | |
1696 | IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,\r | |
1697 | IN OUT UINT32 *FragmentCount,\r | |
1698 | IN IPSEC_SAD_ENTRY *SadEntry,\r | |
1699 | OUT EFI_EVENT *RecycleEvent\r | |
1700 | )\r | |
1701 | {\r | |
1702 | EFI_STATUS Status;\r | |
1703 | UINTN Index;\r | |
1704 | EFI_IPSEC_SA_ID *SaId;\r | |
1705 | IPSEC_SAD_DATA *SadData;\r | |
1706 | IPSEC_RECYCLE_CONTEXT *RecycleContext;\r | |
1707 | UINT8 *ProcessBuffer;\r | |
1708 | UINTN BytesCopied;\r | |
1709 | INTN EncryptBlockSize;// Size of encryption block, 4 bytes aligned and >= 4\r | |
1710 | UINTN EspSize; // Total size of esp wrapped ip payload\r | |
1711 | UINTN IvSize; // Size of IV, optional, might be 0\r | |
1712 | UINTN PlainPayloadSize;// Original IP payload size\r | |
1713 | UINTN PaddingSize; // Size of padding\r | |
1714 | UINTN EncryptSize; // Size of data to be encrypted, start after IV and\r | |
1715 | // stop before ICV\r | |
1716 | UINTN IcvSize; // Size of ICV, optional, might be 0\r | |
1717 | UINT8 *RestOfPayload; // Start of Payload after IV\r | |
1718 | UINT8 *Padding; // Start address of padding\r | |
1719 | EFI_ESP_HEADER *EspHeader; // Start address of ESP frame\r | |
1720 | EFI_ESP_TAIL *EspTail; // Address behind padding\r | |
1721 | UINT8 *InnerHead;\r | |
1722 | HASH_DATA_FRAGMENT HashFragment[1];\r | |
1723 | \r | |
1724 | Status = EFI_ACCESS_DENIED;\r | |
1725 | SaId = SadEntry->Id;\r | |
1726 | SadData = SadEntry->Data;\r | |
1727 | ProcessBuffer = NULL;\r | |
1728 | RecycleContext = NULL;\r | |
1729 | *RecycleEvent = NULL;\r | |
1730 | InnerHead = NULL;\r | |
1731 | \r | |
1732 | if (!SadData->ManualSet &&\r | |
1733 | SadData->AlgoInfo.EspAlgoInfo.EncKey == NULL &&\r | |
1734 | SadData->AlgoInfo.EspAlgoInfo.AuthKey == NULL\r | |
1735 | ) {\r | |
1736 | //\r | |
1737 | // Invalid manual SAD entry configuration.\r | |
1738 | //\r | |
1739 | goto ON_EXIT;\r | |
1740 | }\r | |
1741 | \r | |
1742 | //\r | |
1743 | // Create OutHeader according to Inner Header\r | |
1744 | //\r | |
1745 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
1746 | InnerHead = IpSecTunnelOutboundPacket (\r | |
1747 | IpHead,\r | |
1748 | IpVersion,\r | |
1749 | SadData,\r | |
1750 | LastHead,\r | |
1751 | OptionsBuffer,\r | |
1752 | OptionsLength,\r | |
1753 | FragmentTable,\r | |
1754 | FragmentCount\r | |
1755 | );\r | |
1756 | \r | |
1757 | if (InnerHead == NULL) {\r | |
1758 | return EFI_INVALID_PARAMETER;\r | |
1759 | }\r | |
1760 | \r | |
1761 | }\r | |
1762 | \r | |
1763 | //\r | |
1764 | // Calculate enctrypt block size, need iv by default and 4 bytes alignment.\r | |
1765 | //\r | |
1766 | EncryptBlockSize = 4;\r | |
1767 | \r | |
1768 | if (SadData->AlgoInfo.EspAlgoInfo.EncKey != NULL) {\r | |
1769 | EncryptBlockSize = IpSecGetEncryptBlockSize (SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId);\r | |
1770 | \r | |
1771 | if (EncryptBlockSize < 0 || (EncryptBlockSize != 1 && EncryptBlockSize % 4 != 0)) {\r | |
1772 | goto ON_EXIT;\r | |
1773 | }\r | |
1774 | }\r | |
1775 | \r | |
1776 | //\r | |
1777 | // Calculate the plain payload size accroding to the fragment table.\r | |
1778 | //\r | |
1779 | PlainPayloadSize = 0;\r | |
1780 | for (Index = 0; Index < *FragmentCount; Index++) {\r | |
1781 | PlainPayloadSize += (*FragmentTable)[Index].FragmentLength;\r | |
1782 | }\r | |
1783 | \r | |
1784 | //\r | |
1785 | // Add IPHeader size for Tunnel Mode\r | |
1786 | //\r | |
1787 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
1788 | if (IpVersion == IP_VERSION_4) {\r | |
1789 | PlainPayloadSize += sizeof (IP4_HEAD);\r | |
1790 | } else {\r | |
1791 | PlainPayloadSize += sizeof (EFI_IP6_HEADER);\r | |
1792 | }\r | |
1793 | //\r | |
1794 | // OPtions should be encryption into it\r | |
1795 | //\r | |
1796 | PlainPayloadSize += *OptionsLength;\r | |
1797 | }\r | |
1798 | \r | |
1799 | \r | |
1800 | //\r | |
1801 | // Calculate icv size, optional by default and 4 bytes alignment.\r | |
1802 | //\r | |
1803 | IcvSize = 0;\r | |
1804 | if (SadData->AlgoInfo.EspAlgoInfo.AuthKey != NULL) {\r | |
1805 | IcvSize = IpSecGetIcvLength (SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthAlgoId);\r | |
1806 | if (IcvSize % 4 != 0) {\r | |
1807 | goto ON_EXIT;\r | |
1808 | }\r | |
1809 | }\r | |
1810 | \r | |
1811 | //\r | |
1812 | // Calcuate the total size of esp wrapped ip payload.\r | |
1813 | //\r | |
1814 | IvSize = IpSecGetEncryptIvLength (SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId);\r | |
1815 | EncryptSize = (PlainPayloadSize + sizeof (EFI_ESP_TAIL) + EncryptBlockSize - 1) / EncryptBlockSize * EncryptBlockSize;\r | |
1816 | PaddingSize = EncryptSize - PlainPayloadSize - sizeof (EFI_ESP_TAIL);\r | |
1817 | EspSize = sizeof (EFI_ESP_HEADER) + IvSize + EncryptSize + IcvSize;\r | |
1818 | \r | |
1819 | ProcessBuffer = AllocateZeroPool (EspSize);\r | |
1820 | if (ProcessBuffer == NULL) {\r | |
1821 | Status = EFI_OUT_OF_RESOURCES;\r | |
1822 | goto ON_EXIT;\r | |
1823 | }\r | |
1824 | \r | |
1825 | //\r | |
1826 | // Calculate esp header and esp tail including header, payload and padding.\r | |
1827 | //\r | |
1828 | EspHeader = (EFI_ESP_HEADER *) ProcessBuffer;\r | |
1829 | RestOfPayload = (UINT8 *) (EspHeader + 1) + IvSize;\r | |
1830 | Padding = RestOfPayload + PlainPayloadSize;\r | |
1831 | EspTail = (EFI_ESP_TAIL *) (Padding + PaddingSize);\r | |
1832 | \r | |
1833 | //\r | |
1834 | // Fill the sn and spi fields in esp header.\r | |
1835 | //\r | |
1836 | EspHeader->SequenceNumber = HTONL ((UINT32) SadData->SequenceNumber + 1);\r | |
1837 | //EspHeader->SequenceNumber = HTONL ((UINT32) SadData->SequenceNumber);\r | |
1838 | EspHeader->Spi = HTONL (SaId->Spi);\r | |
1839 | \r | |
1840 | //\r | |
1841 | // Copy the rest of payload (after iv) from the original fragment buffer.\r | |
1842 | //\r | |
1843 | BytesCopied = 0;\r | |
1844 | \r | |
1845 | //\r | |
1846 | // For Tunnel Mode\r | |
1847 | //\r | |
1848 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
1849 | if (IpVersion == IP_VERSION_4) {\r | |
1850 | //\r | |
1851 | // HeadLen, Total Length\r | |
1852 | //\r | |
1853 | ((IP4_HEAD *)InnerHead)->HeadLen = (UINT8) ((sizeof (IP4_HEAD) + *OptionsLength) >> 2);\r | |
1854 | ((IP4_HEAD *)InnerHead)->TotalLen = HTONS ((UINT16) PlainPayloadSize);\r | |
1855 | ((IP4_HEAD *)InnerHead)->Checksum = 0;\r | |
1856 | ((IP4_HEAD *)InnerHead)->Checksum = (UINT16) (~NetblockChecksum (\r | |
1857 | (UINT8 *)InnerHead,\r | |
1858 | sizeof(IP4_HEAD)\r | |
1859 | ));\r | |
1860 | CopyMem (\r | |
1861 | RestOfPayload + BytesCopied,\r | |
1862 | InnerHead,\r | |
1863 | sizeof (IP4_HEAD) + *OptionsLength\r | |
1864 | );\r | |
1865 | BytesCopied += sizeof (IP4_HEAD) + *OptionsLength;\r | |
1866 | \r | |
1867 | } else {\r | |
1868 | ((EFI_IP6_HEADER *)InnerHead)->PayloadLength = HTONS ((UINT16) (PlainPayloadSize - sizeof (EFI_IP6_HEADER)));\r | |
1869 | CopyMem (\r | |
1870 | RestOfPayload + BytesCopied,\r | |
1871 | InnerHead,\r | |
1872 | sizeof (EFI_IP6_HEADER) + *OptionsLength\r | |
1873 | );\r | |
1874 | BytesCopied += sizeof (EFI_IP6_HEADER) + *OptionsLength;\r | |
1875 | }\r | |
1876 | }\r | |
1877 | \r | |
1878 | for (Index = 0; Index < *FragmentCount; Index++) {\r | |
1879 | CopyMem (\r | |
1880 | (RestOfPayload + BytesCopied),\r | |
1881 | (*FragmentTable)[Index].FragmentBuffer,\r | |
1882 | (*FragmentTable)[Index].FragmentLength\r | |
1883 | );\r | |
1884 | BytesCopied += (*FragmentTable)[Index].FragmentLength;\r | |
1885 | }\r | |
1886 | //\r | |
1887 | // Fill the padding buffer by natural number sequence.\r | |
1888 | //\r | |
1889 | for (Index = 0; Index < PaddingSize; Index++) {\r | |
1890 | Padding[Index] = (UINT8) (Index + 1);\r | |
1891 | }\r | |
1892 | //\r | |
1893 | // Fill the padding length and next header fields in esp tail.\r | |
1894 | //\r | |
1895 | EspTail->PaddingLength = (UINT8) PaddingSize;\r | |
1896 | EspTail->NextHeader = *LastHead;\r | |
1897 | \r | |
1898 | //\r | |
1899 | // Fill the next header for Tunnel mode.\r | |
1900 | //\r | |
1901 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
1902 | if (IpVersion == IP_VERSION_4) {\r | |
1903 | EspTail->NextHeader = 4;\r | |
1904 | } else {\r | |
1905 | EspTail->NextHeader = 41;\r | |
1906 | }\r | |
1907 | }\r | |
1908 | \r | |
1909 | //\r | |
1910 | // Generate iv at random by crypt library.\r | |
1911 | //\r | |
1912 | Status = IpSecGenerateIv (\r | |
1913 | (UINT8 *) (EspHeader + 1),\r | |
1914 | IvSize\r | |
1915 | );\r | |
1916 | \r | |
1917 | \r | |
1918 | if (EFI_ERROR (Status)) {\r | |
1919 | goto ON_EXIT;\r | |
1920 | }\r | |
1921 | \r | |
1922 | //\r | |
1923 | // Encryption the payload (after iv) by the SAD entry if has encrypt key.\r | |
1924 | //\r | |
1925 | if (SadData->AlgoInfo.EspAlgoInfo.EncKey != NULL) {\r | |
1926 | Status = IpSecCryptoIoEncrypt (\r | |
1927 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncAlgoId,\r | |
1928 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncKey,\r | |
1929 | SadEntry->Data->AlgoInfo.EspAlgoInfo.EncKeyLength << 3,\r | |
1930 | (UINT8 *)(EspHeader + 1),\r | |
1931 | RestOfPayload,\r | |
1932 | EncryptSize,\r | |
1933 | RestOfPayload\r | |
1934 | );\r | |
1935 | \r | |
1936 | if (EFI_ERROR (Status)) {\r | |
1937 | goto ON_EXIT;\r | |
1938 | }\r | |
1939 | }\r | |
1940 | \r | |
1941 | //\r | |
1942 | // Authenticate the esp wrapped buffer by the SAD entry if it has auth key.\r | |
1943 | //\r | |
1944 | if (SadData->AlgoInfo.EspAlgoInfo.AuthKey != NULL) {\r | |
1945 | \r | |
1946 | HashFragment[0].Data = ProcessBuffer;\r | |
1947 | HashFragment[0].DataSize = EspSize - IcvSize;\r | |
1948 | Status = IpSecCryptoIoHmac (\r | |
1949 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthAlgoId,\r | |
1950 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthKey,\r | |
1951 | SadEntry->Data->AlgoInfo.EspAlgoInfo.AuthKeyLength,\r | |
1952 | HashFragment,\r | |
1953 | 1,\r | |
1954 | ProcessBuffer + EspSize - IcvSize,\r | |
1955 | IcvSize\r | |
1956 | );\r | |
1957 | if (EFI_ERROR (Status)) {\r | |
1958 | goto ON_EXIT;\r | |
1959 | }\r | |
1960 | }\r | |
1961 | \r | |
1962 | //\r | |
1963 | // Encryption and authentication with esp has been done, so it's time to\r | |
1964 | // reload the new packet, create recycle event and fixup ip header.\r | |
1965 | //\r | |
1966 | RecycleContext = AllocateZeroPool (sizeof (IPSEC_RECYCLE_CONTEXT));\r | |
1967 | if (RecycleContext == NULL) {\r | |
1968 | Status = EFI_OUT_OF_RESOURCES;\r | |
1969 | goto ON_EXIT;\r | |
1970 | }\r | |
1971 | \r | |
1972 | Status = gBS->CreateEvent (\r | |
1973 | EVT_NOTIFY_SIGNAL,\r | |
1974 | TPL_NOTIFY,\r | |
1975 | IpSecRecycleCallback,\r | |
1976 | RecycleContext,\r | |
1977 | RecycleEvent\r | |
1978 | );\r | |
1979 | if (EFI_ERROR (Status)) {\r | |
1980 | goto ON_EXIT;\r | |
1981 | }\r | |
1982 | //\r | |
1983 | // Caller take responsible to handle the original fragment table.\r | |
1984 | //\r | |
1985 | *FragmentTable = AllocateZeroPool (sizeof (EFI_IPSEC_FRAGMENT_DATA));\r | |
1986 | if (*FragmentTable == NULL) {\r | |
1987 | Status = EFI_OUT_OF_RESOURCES;\r | |
1988 | goto ON_EXIT;\r | |
1989 | }\r | |
1990 | \r | |
1991 | RecycleContext->FragmentTable = *FragmentTable;\r | |
1992 | RecycleContext->PayloadBuffer = ProcessBuffer;\r | |
1993 | (*FragmentTable)[0].FragmentBuffer = ProcessBuffer;\r | |
1994 | (*FragmentTable)[0].FragmentLength = (UINT32) EspSize;\r | |
1995 | *FragmentCount = 1;\r | |
1996 | \r | |
1997 | //\r | |
1998 | // Update the total length field in ip header since processed by esp.\r | |
1999 | //\r | |
2000 | if (IpVersion == IP_VERSION_4) {\r | |
2001 | ((IP4_HEAD *) IpHead)->TotalLen = HTONS ((UINT16) ((((IP4_HEAD *) IpHead)->HeadLen << 2) + EspSize));\r | |
2002 | } else {\r | |
2003 | ((EFI_IP6_HEADER *) IpHead)->PayloadLength = (UINT16) (IpSecGetPlainExtHeadSize (IpHead, LastHead) + EspSize);\r | |
2004 | }\r | |
2005 | \r | |
2006 | //\r | |
2007 | // If tunnel mode, it should change the outer Ip header with tunnel source address\r | |
2008 | // and destination tunnel address.\r | |
2009 | //\r | |
2010 | if (SadData->Mode == EfiIPsecTunnel) {\r | |
2011 | if (IpVersion == IP_VERSION_4) {\r | |
2012 | CopyMem (\r | |
2013 | &((IP4_HEAD *) IpHead)->Src,\r | |
2014 | &SadData->TunnelSourceAddress.v4,\r | |
2015 | sizeof (EFI_IPv4_ADDRESS)\r | |
2016 | );\r | |
2017 | CopyMem (\r | |
2018 | &((IP4_HEAD *) IpHead)->Dst,\r | |
2019 | &SadData->TunnelDestAddress.v4,\r | |
2020 | sizeof (EFI_IPv4_ADDRESS)\r | |
2021 | );\r | |
2022 | } else {\r | |
2023 | CopyMem (\r | |
2024 | &((EFI_IP6_HEADER *) IpHead)->SourceAddress,\r | |
2025 | &SadData->TunnelSourceAddress.v6,\r | |
2026 | sizeof (EFI_IPv6_ADDRESS)\r | |
2027 | );\r | |
2028 | CopyMem (\r | |
2029 | &((EFI_IP6_HEADER *) IpHead)->DestinationAddress,\r | |
2030 | &SadData->TunnelDestAddress.v6,\r | |
2031 | sizeof (EFI_IPv6_ADDRESS)\r | |
2032 | );\r | |
2033 | }\r | |
2034 | }\r | |
2035 | \r | |
2036 | //\r | |
2037 | // Update the next layer field in ip header since esp header inserted.\r | |
2038 | //\r | |
2039 | *LastHead = IPSEC_ESP_PROTOCOL;\r | |
2040 | \r | |
2041 | //\r | |
2042 | // Increase the sn number in SAD entry according to rfc4303.\r | |
2043 | //\r | |
2044 | SadData->SequenceNumber++;\r | |
2045 | \r | |
2046 | ON_EXIT:\r | |
2047 | if (EFI_ERROR (Status)) {\r | |
2048 | if (ProcessBuffer != NULL) {\r | |
2049 | FreePool (ProcessBuffer);\r | |
2050 | }\r | |
2051 | \r | |
2052 | if (RecycleContext != NULL) {\r | |
2053 | FreePool (RecycleContext);\r | |
2054 | }\r | |
2055 | \r | |
2056 | if (*RecycleEvent != NULL) {\r | |
2057 | gBS->CloseEvent (*RecycleEvent);\r | |
2058 | }\r | |
2059 | }\r | |
2060 | \r | |
2061 | return Status;\r | |
2062 | }\r | |
2063 | \r | |
2064 | /**\r | |
2065 | This function processes the inbound traffic with IPsec.\r | |
2066 | \r | |
2067 | It checks the received packet security property, trims the ESP/AH header, and then\r | |
2068 | returns without an IPsec protected IP Header and FragmentTable.\r | |
2069 | \r | |
2070 | @param[in] IpVersion The version of IP.\r | |
2071 | @param[in, out] IpHead Points to IP header containing the ESP/AH header\r | |
2072 | to be trimed on input, and without ESP/AH header\r | |
2073 | on return.\r | |
2074 | @param[in, out] LastHead The Last Header in IP header on return.\r | |
2075 | @param[in, out] OptionsBuffer Pointer to the options buffer.\r | |
2076 | @param[in, out] OptionsLength Length of the options buffer.\r | |
2077 | @param[in, out] FragmentTable Pointer to a list of fragments in form of IPsec\r | |
2078 | protected on input, and without IPsec protected\r | |
2079 | on return.\r | |
2080 | @param[in, out] FragmentCount The number of fragments.\r | |
2081 | @param[out] SpdEntry Pointer to contain the address of SPD entry on return.\r | |
2082 | @param[out] RecycleEvent The event for recycling of resources.\r | |
2083 | \r | |
2084 | @retval EFI_SUCCESS The operation was successful.\r | |
2085 | @retval EFI_UNSUPPORTED The IPSEC protocol is not supported.\r | |
2086 | \r | |
2087 | **/\r | |
2088 | EFI_STATUS\r | |
2089 | IpSecProtectInboundPacket (\r | |
2090 | IN UINT8 IpVersion,\r | |
2091 | IN OUT VOID *IpHead,\r | |
2092 | IN OUT UINT8 *LastHead,\r | |
2093 | IN OUT VOID **OptionsBuffer,\r | |
2094 | IN OUT UINT32 *OptionsLength,\r | |
2095 | IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,\r | |
2096 | IN OUT UINT32 *FragmentCount,\r | |
2097 | OUT EFI_IPSEC_SPD_SELECTOR **SpdEntry,\r | |
2098 | OUT EFI_EVENT *RecycleEvent\r | |
2099 | )\r | |
2100 | {\r | |
2101 | if (*LastHead == IPSEC_ESP_PROTOCOL) {\r | |
2102 | //\r | |
2103 | // Process the esp ipsec header of the inbound traffic.\r | |
2104 | //\r | |
2105 | return IpSecEspInboundPacket (\r | |
2106 | IpVersion,\r | |
2107 | IpHead,\r | |
2108 | LastHead,\r | |
2109 | OptionsBuffer,\r | |
2110 | OptionsLength,\r | |
2111 | FragmentTable,\r | |
2112 | FragmentCount,\r | |
2113 | SpdEntry,\r | |
2114 | RecycleEvent\r | |
2115 | );\r | |
2116 | }\r | |
2117 | //\r | |
2118 | // The other protocols are not supported.\r | |
2119 | //\r | |
2120 | return EFI_UNSUPPORTED;\r | |
2121 | }\r | |
2122 | \r | |
2123 | /**\r | |
2124 | This fucntion processes the output traffic with IPsec.\r | |
2125 | \r | |
2126 | It protected the sending packet by encrypting it payload and inserting ESP/AH header\r | |
2127 | in the orginal IP header, then return the IpHeader and IPsec protected Fragmentable.\r | |
2128 | \r | |
2129 | @param[in] IpVersion The version of IP.\r | |
2130 | @param[in, out] IpHead Point to IP header containing the orginal IP header\r | |
2131 | to be processed on input, and inserted ESP/AH header\r | |
2132 | on return.\r | |
2133 | @param[in, out] LastHead The Last Header in IP header.\r | |
2134 | @param[in, out] OptionsBuffer Pointer to the options buffer.\r | |
2135 | @param[in, out] OptionsLength Length of the options buffer.\r | |
2136 | @param[in, out] FragmentTable Pointer to a list of fragments to be protected by\r | |
2137 | IPsec on input, and with IPsec protected\r | |
2138 | on return.\r | |
2139 | @param[in, out] FragmentCount Number of fragments.\r | |
2140 | @param[in] SadEntry Related SAD entry.\r | |
2141 | @param[out] RecycleEvent Event for recycling of resources.\r | |
2142 | \r | |
2143 | @retval EFI_SUCCESS The operation is successful.\r | |
2144 | @retval EFI_UNSUPPORTED If the IPSEC protocol is not supported.\r | |
2145 | \r | |
2146 | **/\r | |
2147 | EFI_STATUS\r | |
2148 | IpSecProtectOutboundPacket (\r | |
2149 | IN UINT8 IpVersion,\r | |
2150 | IN OUT VOID *IpHead,\r | |
2151 | IN OUT UINT8 *LastHead,\r | |
2152 | IN OUT VOID **OptionsBuffer,\r | |
2153 | IN OUT UINT32 *OptionsLength,\r | |
2154 | IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable,\r | |
2155 | IN OUT UINT32 *FragmentCount,\r | |
2156 | IN IPSEC_SAD_ENTRY *SadEntry,\r | |
2157 | OUT EFI_EVENT *RecycleEvent\r | |
2158 | )\r | |
2159 | {\r | |
2160 | if (SadEntry->Id->Proto == EfiIPsecESP) {\r | |
2161 | //\r | |
2162 | // Process the esp ipsec header of the outbound traffic.\r | |
2163 | //\r | |
2164 | return IpSecEspOutboundPacket (\r | |
2165 | IpVersion,\r | |
2166 | IpHead,\r | |
2167 | LastHead,\r | |
2168 | OptionsBuffer,\r | |
2169 | OptionsLength,\r | |
2170 | FragmentTable,\r | |
2171 | FragmentCount,\r | |
2172 | SadEntry,\r | |
2173 | RecycleEvent\r | |
2174 | );\r | |
2175 | }\r | |
2176 | //\r | |
2177 | // The other protocols are not supported.\r | |
2178 | //\r | |
2179 | return EFI_UNSUPPORTED;\r | |
2180 | }\r |