1 /** @file 2 The definitions related to IPsec protocol implementation. 3 4 Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR> 5 6 This program and the accompanying materials 7 are licensed and made available under the terms and conditions of the BSD License 8 which accompanies this distribution. The full text of the license may be found at 9 http://opensource.org/licenses/bsd-license.php. 10 11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 13 14 **/ 15 16 #ifndef _IP_SEC_IMPL_H_ 17 #define _IP_SEC_IMPL_H_ 18 19 #include <Uefi.h> 20 #include <Library/UefiLib.h> 21 #include <Library/NetLib.h> 22 #include <Library/BaseMemoryLib.h> 23 #include <Library/UefiBootServicesTableLib.h> 24 #include <Library/MemoryAllocationLib.h> 25 #include <Protocol/IpSec.h> 26 #include <Protocol/IpSecConfig.h> 27 #include <Protocol/Dpc.h> 28 #include <Protocol/ComponentName.h> 29 #include <Protocol/ComponentName2.h> 30 31 typedef struct _IPSEC_PRIVATE_DATA IPSEC_PRIVATE_DATA; 32 typedef struct _IPSEC_SPD_ENTRY IPSEC_SPD_ENTRY; 33 typedef struct _IPSEC_PAD_ENTRY IPSEC_PAD_ENTRY; 34 typedef struct _IPSEC_SPD_DATA IPSEC_SPD_DATA; 35 36 #define IPSEC_PRIVATE_DATA_SIGNATURE SIGNATURE_32 ('I', 'P', 'S', 'E') 37 38 #define IPSEC_PRIVATE_DATA_FROM_IPSEC(a) CR (a, IPSEC_PRIVATE_DATA, IpSec, IPSEC_PRIVATE_DATA_SIGNATURE) 39 #define IPSEC_PRIVATE_DATA_FROM_UDP4LIST(a) CR (a, IPSEC_PRIVATE_DATA, Udp4List, IPSEC_PRIVATE_DATA_SIGNATURE) 40 #define IPSEC_PRIVATE_DATA_FROM_UDP6LIST(a) CR (a, IPSEC_PRIVATE_DATA, Udp6List, IPSEC_PRIVATE_DATA_SIGNATURE) 41 #define IPSEC_UDP_SERVICE_FROM_LIST(a) BASE_CR (a, IKE_UDP_SERVICE, List) 42 #define IPSEC_SPD_ENTRY_FROM_LIST(a) BASE_CR (a, IPSEC_SPD_ENTRY, List) 43 #define IPSEC_SAD_ENTRY_FROM_LIST(a) BASE_CR (a, IPSEC_SAD_ENTRY, List) 44 #define IPSEC_PAD_ENTRY_FROM_LIST(a) BASE_CR (a, IPSEC_PAD_ENTRY, List) 45 #define IPSEC_SAD_ENTRY_FROM_SPD(a) BASE_CR (a, IPSEC_SAD_ENTRY, BySpd) 46 47 #define IPSEC_STATUS_DISABLED 0 48 #define IPSEC_STATUS_ENABLED 1 49 #define IPSEC_ESP_PROTOCOL 50 50 #define IPSEC_AH_PROTOCOL 51 51 #define IPSEC_DEFAULT_VARIABLE_SIZE 0x100 52 53 // 54 // Internal Structure Definition 55 // 56 #pragma pack(1) 57 typedef struct _EFI_AH_HEADER { 58 UINT8 NextHeader; 59 UINT8 PayloadLen; 60 UINT16 Reserved; 61 UINT32 Spi; 62 UINT32 SequenceNumber; 63 } EFI_AH_HEADER; 64 65 typedef struct _EFI_ESP_HEADER { 66 UINT32 Spi; 67 UINT32 SequenceNumber; 68 } EFI_ESP_HEADER; 69 70 typedef struct _EFI_ESP_TAIL { 71 UINT8 PaddingLength; 72 UINT8 NextHeader; 73 } EFI_ESP_TAIL; 74 #pragma pack() 75 76 struct _IPSEC_SPD_DATA { 77 CHAR16 Name[100]; 78 UINT32 PackageFlag; 79 EFI_IPSEC_TRAFFIC_DIR TrafficDirection; 80 EFI_IPSEC_ACTION Action; 81 EFI_IPSEC_PROCESS_POLICY *ProcessingPolicy; 82 LIST_ENTRY Sas; 83 }; 84 85 struct _IPSEC_SPD_ENTRY { 86 EFI_IPSEC_SPD_SELECTOR *Selector; 87 IPSEC_SPD_DATA *Data; 88 LIST_ENTRY List; 89 }; 90 91 typedef struct _IPSEC_SAD_DATA { 92 EFI_IPSEC_MODE Mode; 93 UINT64 SequenceNumber; 94 UINT8 AntiReplayWindowSize; 95 UINT64 AntiReplayBitmap[4]; // bitmap for received packet 96 EFI_IPSEC_ALGO_INFO AlgoInfo; 97 EFI_IPSEC_SA_LIFETIME SaLifetime; 98 UINT32 PathMTU; 99 IPSEC_SPD_ENTRY *SpdEntry; 100 EFI_IPSEC_SPD_SELECTOR *SpdSelector; 101 BOOLEAN ESNEnabled; // Extended (64-bit) SN enabled 102 BOOLEAN ManualSet; 103 EFI_IP_ADDRESS TunnelDestAddress; 104 EFI_IP_ADDRESS TunnelSourceAddress; 105 } IPSEC_SAD_DATA; 106 107 typedef struct _IPSEC_SAD_ENTRY { 108 EFI_IPSEC_SA_ID *Id; 109 IPSEC_SAD_DATA *Data; 110 LIST_ENTRY List; 111 LIST_ENTRY BySpd; // Linked on IPSEC_SPD_DATA.Sas 112 } IPSEC_SAD_ENTRY; 113 114 struct _IPSEC_PAD_ENTRY { 115 EFI_IPSEC_PAD_ID *Id; 116 EFI_IPSEC_PAD_DATA *Data; 117 LIST_ENTRY List; 118 }; 119 120 typedef struct _IPSEC_RECYCLE_CONTEXT { 121 EFI_IPSEC_FRAGMENT_DATA *FragmentTable; 122 UINT8 *PayloadBuffer; 123 } IPSEC_RECYCLE_CONTEXT; 124 125 // 126 // Struct used to store the Hash and its data. 127 // 128 typedef struct { 129 UINTN DataSize; 130 UINT8 *Data; 131 } HASH_DATA_FRAGMENT; 132 133 struct _IPSEC_PRIVATE_DATA { 134 UINT32 Signature; 135 EFI_HANDLE Handle; // Virtual handle to install private prtocol 136 EFI_HANDLE ImageHandle; 137 EFI_IPSEC2_PROTOCOL IpSec; 138 EFI_IPSEC_CONFIG_PROTOCOL IpSecConfig; 139 BOOLEAN SetBySelf; 140 LIST_ENTRY Udp4List; 141 UINTN Udp4Num; 142 LIST_ENTRY Udp6List; 143 UINTN Udp6Num; 144 LIST_ENTRY Ikev1SessionList; 145 LIST_ENTRY Ikev1EstablishedList; 146 LIST_ENTRY Ikev2SessionList; 147 LIST_ENTRY Ikev2EstablishedList; 148 BOOLEAN IsIPsecDisabling; 149 }; 150 151 /** 152 This function processes the inbound traffic with IPsec. 153 154 It checks the received packet security property, trims the ESP/AH header, and then 155 returns without an IPsec protected IP Header and FragmentTable. 156 157 @param[in] IpVersion The version of IP. 158 @param[in, out] IpHead Points to IP header containing the ESP/AH header 159 to be trimed on input, and without ESP/AH header 160 on return. 161 @param[in, out] LastHead The Last Header in IP header on return. 162 @param[in, out] OptionsBuffer Pointer to the options buffer. 163 @param[in, out] OptionsLength Length of the options buffer. 164 @param[in, out] FragmentTable Pointer to a list of fragments in form of IPsec 165 protected on input, and without IPsec protected 166 on return. 167 @param[in, out] FragmentCount The number of fragments. 168 @param[out] SpdEntry Pointer to contain the address of SPD entry on return. 169 @param[out] RecycleEvent The event for recycling of resources. 170 171 @retval EFI_SUCCESS The operation was successful. 172 @retval EFI_UNSUPPORTED The IPSEC protocol is not supported. 173 174 **/ 175 EFI_STATUS 176 IpSecProtectInboundPacket ( 177 IN UINT8 IpVersion, 178 IN OUT VOID *IpHead, 179 IN OUT UINT8 *LastHead, 180 IN OUT VOID **OptionsBuffer, 181 IN OUT UINT32 *OptionsLength, 182 IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable, 183 IN OUT UINT32 *FragmentCount, 184 OUT EFI_IPSEC_SPD_SELECTOR **SpdEntry, 185 OUT EFI_EVENT *RecycleEvent 186 ); 187 188 189 /** 190 This fucntion processes the output traffic with IPsec. 191 192 It protected the sending packet by encrypting it payload and inserting ESP/AH header 193 in the orginal IP header, then return the IpHeader and IPsec protected Fragmentable. 194 195 @param[in] IpVersion The version of IP. 196 @param[in, out] IpHead Point to IP header containing the orginal IP header 197 to be processed on input, and inserted ESP/AH header 198 on return. 199 @param[in, out] LastHead The Last Header in IP header. 200 @param[in, out] OptionsBuffer Pointer to the options buffer. 201 @param[in, out] OptionsLength Length of the options buffer. 202 @param[in, out] FragmentTable Pointer to a list of fragments to be protected by 203 IPsec on input, and with IPsec protected 204 on return. 205 @param[in, out] FragmentCount Number of fragments. 206 @param[in] SadEntry Related SAD entry. 207 @param[out] RecycleEvent Event for recycling of resources. 208 209 @retval EFI_SUCCESS The operation is successful. 210 @retval EFI_UNSUPPORTED If the IPSEC protocol is not supported. 211 212 **/ 213 EFI_STATUS 214 IpSecProtectOutboundPacket ( 215 IN UINT8 IpVersion, 216 IN OUT VOID *IpHead, 217 IN OUT UINT8 *LastHead, 218 IN OUT VOID **OptionsBuffer, 219 IN OUT UINT32 *OptionsLength, 220 IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable, 221 IN OUT UINT32 *FragmentCount, 222 IN IPSEC_SAD_ENTRY *SadEntry, 223 OUT EFI_EVENT *RecycleEvent 224 ); 225 226 /** 227 Check if the IP Address in the address range of AddressInfos specified. 228 229 @param[in] IpVersion The IP version. 230 @param[in] IpAddr Points to EFI_IP_ADDRESS to be check. 231 @param[in] AddressInfo A list of EFI_IP_ADDRESS_INFO that is used to check 232 the IP Address is matched. 233 @param[in] AddressCount The total numbers of the AddressInfo. 234 235 @retval TRUE If the Specified IP Address is in the range of the AddressInfos specified. 236 @retval FALSE If the Specified IP Address is not in the range of the AddressInfos specified. 237 238 **/ 239 BOOLEAN 240 IpSecMatchIpAddress ( 241 IN UINT8 IpVersion, 242 IN EFI_IP_ADDRESS *IpAddr, 243 IN EFI_IP_ADDRESS_INFO *AddressInfo, 244 IN UINT32 AddressCount 245 ); 246 247 /** 248 Find a PAD entry according to remote IP address. 249 250 @param[in] IpVersion The version of IP. 251 @param[in] IpAddr Point to remote IP address. 252 253 @return The pointer of related PAD entry. 254 255 **/ 256 IPSEC_PAD_ENTRY * 257 IpSecLookupPadEntry ( 258 IN UINT8 IpVersion, 259 IN EFI_IP_ADDRESS *IpAddr 260 ); 261 262 /** 263 Check if the specified IP packet can be serviced by this SPD entry. 264 265 @param[in] SpdEntry Point to SPD entry. 266 @param[in] IpVersion Version of IP. 267 @param[in] IpHead Point to IP header. 268 @param[in] IpPayload Point to IP payload. 269 @param[in] Protocol The Last protocol of IP packet. 270 @param[in] IsOutbound Traffic direction. 271 @param[out] Action The support action of SPD entry. 272 273 @retval EFI_SUCCESS Find the related SPD. 274 @retval EFI_NOT_FOUND Not find the related SPD entry; 275 276 **/ 277 EFI_STATUS 278 IpSecLookupSpdEntry ( 279 IN IPSEC_SPD_ENTRY *SpdEntry, 280 IN UINT8 IpVersion, 281 IN VOID *IpHead, 282 IN UINT8 *IpPayload, 283 IN UINT8 Protocol, 284 IN BOOLEAN IsOutbound, 285 OUT EFI_IPSEC_ACTION *Action 286 ); 287 288 /** 289 Look up if there is existing SAD entry for specified IP packet sending. 290 291 This function is called by the IPsecProcess when there is some IP packet needed to 292 send out. This function checks if there is an existing SAD entry that can be serviced 293 to this IP packet sending. If no existing SAD entry could be used, this 294 function will invoke an IPsec Key Exchange Negotiation. 295 296 @param[in] Private Points to private data. 297 @param[in] NicHandle Points to a NIC handle. 298 @param[in] IpVersion The version of IP. 299 @param[in] IpHead The IP Header of packet to be sent out. 300 @param[in] IpPayload The IP Payload to be sent out. 301 @param[in] OldLastHead The Last protocol of the IP packet. 302 @param[in] SpdEntry Points to a related SPD entry. 303 @param[out] SadEntry Contains the Point of a related SAD entry. 304 305 @retval EFI_DEVICE_ERROR One of following conditions is TRUE: 306 - If don't find related UDP service. 307 - Sequence Number is used up. 308 - Extension Sequence Number is used up. 309 @retval EFI_NOT_READY No existing SAD entry could be used. 310 @retval EFI_SUCCESS Find the related SAD entry. 311 312 **/ 313 EFI_STATUS 314 IpSecLookupSadEntry ( 315 IN IPSEC_PRIVATE_DATA *Private, 316 IN EFI_HANDLE NicHandle, 317 IN UINT8 IpVersion, 318 IN VOID *IpHead, 319 IN UINT8 *IpPayload, 320 IN UINT8 OldLastHead, 321 IN IPSEC_SPD_ENTRY *SpdEntry, 322 OUT IPSEC_SAD_ENTRY **SadEntry 323 ); 324 325 /** 326 Find the SAD through whole SAD list. 327 328 @param[in] Spi The SPI used to search the SAD entry. 329 @param[in] DestAddress The destination used to search the SAD entry. 330 @param[in] IpVersion The IP version. Ip4 or Ip6. 331 332 @return The pointer to a certain SAD entry. 333 334 **/ 335 IPSEC_SAD_ENTRY * 336 IpSecLookupSadBySpi ( 337 IN UINT32 Spi, 338 IN EFI_IP_ADDRESS *DestAddress, 339 IN UINT8 IpVersion 340 ) 341 ; 342 343 /** 344 Handles IPsec packet processing for inbound and outbound IP packets. 345 346 The EFI_IPSEC_PROCESS process routine handles each inbound or outbound packet. 347 The behavior is that it can perform one of the following actions: 348 bypass the packet, discard the packet, or protect the packet. 349 350 @param[in] This Pointer to the EFI_IPSEC2_PROTOCOL instance. 351 @param[in] NicHandle Instance of the network interface. 352 @param[in] IpVersion IPV4 or IPV6. 353 @param[in, out] IpHead Pointer to the IP Header. 354 @param[in, out] LastHead The protocol of the next layer to be processed by IPsec. 355 @param[in, out] OptionsBuffer Pointer to the options buffer. 356 @param[in, out] OptionsLength Length of the options buffer. 357 @param[in, out] FragmentTable Pointer to a list of fragments. 358 @param[in, out] FragmentCount Number of fragments. 359 @param[in] TrafficDirection Traffic direction. 360 @param[out] RecycleSignal Event for recycling of resources. 361 362 @retval EFI_SUCCESS The packet was bypassed and all buffers remain the same. 363 @retval EFI_SUCCESS The packet was protected. 364 @retval EFI_ACCESS_DENIED The packet was discarded. 365 366 **/ 367 EFI_STATUS 368 EFIAPI 369 IpSecProcess ( 370 IN EFI_IPSEC2_PROTOCOL *This, 371 IN EFI_HANDLE NicHandle, 372 IN UINT8 IpVersion, 373 IN OUT VOID *IpHead, 374 IN OUT UINT8 *LastHead, 375 IN OUT VOID **OptionsBuffer, 376 IN OUT UINT32 *OptionsLength, 377 IN OUT EFI_IPSEC_FRAGMENT_DATA **FragmentTable, 378 IN OUT UINT32 *FragmentCount, 379 IN EFI_IPSEC_TRAFFIC_DIR TrafficDirection, 380 OUT EFI_EVENT *RecycleSignal 381 ); 382 383 extern EFI_DPC_PROTOCOL *mDpc; 384 extern EFI_IPSEC2_PROTOCOL mIpSecInstance; 385 386 extern EFI_COMPONENT_NAME2_PROTOCOL gIpSecComponentName2; 387 extern EFI_COMPONENT_NAME_PROTOCOL gIpSecComponentName; 388 389 390 #endif 391
