1 /** @file 2 The operations for Child SA. 3 4 Copyright (c) 2010 - 2016, 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 #include "Utility.h" 17 18 /** 19 Generate IKE Packet for CREATE_CHILD_SA exchange. 20 21 This IKE Packet would be the packet for creating new CHILD SA, or the packet for 22 rekeying existing IKE SA, or the packet for existing CHILD SA. 23 24 @param[in] SaSession Pointer to related SA session. 25 @param[in] Context The data passed by the caller. 26 27 return a pointer of IKE packet. 28 29 **/ 30 IKE_PACKET * 31 Ikev2CreateChildGenerator ( 32 IN UINT8 *SaSession, 33 IN VOID *Context 34 ) 35 { 36 37 IKEV2_CHILD_SA_SESSION *ChildSaSession; 38 IKEV2_SA_SESSION *IkeSaSession; 39 IKE_PACKET *IkePacket; 40 IKE_PAYLOAD *NotifyPayload; 41 UINT32 *MessageId; 42 43 NotifyPayload = NULL; 44 MessageId = NULL; 45 46 ChildSaSession = (IKEV2_CHILD_SA_SESSION *) SaSession; 47 if (ChildSaSession == NULL) { 48 return NULL; 49 } 50 51 IkePacket = IkePacketAlloc(); 52 if (IkePacket == NULL) { 53 return NULL; 54 } 55 56 57 if (Context != NULL) { 58 MessageId = (UINT32 *) Context; 59 } 60 61 IkePacket->Header->Version = (UINT8) (2 << 4); 62 IkePacket->Header->NextPayload = IKEV2_PAYLOAD_TYPE_NOTIFY; 63 IkePacket->Header->ExchangeType = IKE_XCG_TYPE_CREATE_CHILD_SA; 64 65 if (ChildSaSession->SessionCommon.IkeSessionType == IkeSessionTypeChildSa) { 66 // 67 // 1.a Fill the IkePacket->Hdr 68 // 69 IkePacket->Header->InitiatorCookie = ChildSaSession->IkeSaSession->InitiatorCookie; 70 IkePacket->Header->ResponderCookie = ChildSaSession->IkeSaSession->ResponderCookie; 71 72 if (MessageId != NULL) { 73 IkePacket->Header->MessageId = *MessageId; 74 } else { 75 IkePacket->Header->MessageId = ChildSaSession->MessageId; 76 } 77 78 if (ChildSaSession->SessionCommon.IsInitiator) { 79 IkePacket->Header->Flags = IKE_HEADER_FLAGS_INIT; 80 } 81 82 } else { 83 IkeSaSession = (IKEV2_SA_SESSION *) SaSession; 84 // 85 // 1.a Fill the IkePacket->Hdr 86 // 87 IkePacket->Header->InitiatorCookie = IkeSaSession->InitiatorCookie; 88 IkePacket->Header->ResponderCookie = IkeSaSession->ResponderCookie; 89 90 if (MessageId != NULL) { 91 IkePacket->Header->MessageId = *MessageId; 92 } else { 93 IkePacket->Header->MessageId = IkeSaSession->MessageId; 94 } 95 96 if (IkeSaSession->SessionCommon.IsInitiator) { 97 IkePacket->Header->Flags = IKE_HEADER_FLAGS_INIT; 98 } 99 } 100 101 if (MessageId != NULL) { 102 IkePacket->Header->Flags |= IKE_HEADER_FLAGS_RESPOND; 103 } 104 105 // 106 // According to RFC4306, Chapter 4. 107 // A minimal implementation may support the CREATE_CHILD_SA exchange only to 108 // recognize requests and reject them with a Notify payload of type NO_ADDITIONAL_SAS. 109 // 110 NotifyPayload = Ikev2GenerateNotifyPayload ( 111 0, 112 IKEV2_PAYLOAD_TYPE_NONE, 113 0, 114 IKEV2_NOTIFICATION_NO_ADDITIONAL_SAS, 115 NULL, 116 NULL, 117 0 118 ); 119 if (NotifyPayload == NULL) { 120 IkePacketFree (IkePacket); 121 return NULL; 122 } 123 124 IKE_PACKET_APPEND_PAYLOAD (IkePacket, NotifyPayload); 125 // 126 // TODO: Support the CREATE_CHILD_SA exchange. 127 // 128 return IkePacket; 129 } 130 131 /** 132 Parse the IKE packet of CREATE_CHILD_SA exchange. 133 134 This function parse the IKE packet and save the related information to further 135 calculation. 136 137 @param[in] SaSession Pointer to IKEv2_CHILD_SA_SESSION related to this Exchange. 138 @param[in] IkePacket Received packet to be parsed. 139 140 141 @retval EFI_SUCCESS The IKE Packet is acceptable. 142 @retval EFI_UNSUPPORTED Not support the CREATE_CHILD_SA request. 143 144 **/ 145 EFI_STATUS 146 Ikev2CreateChildParser ( 147 IN UINT8 *SaSession, 148 IN IKE_PACKET *IkePacket 149 ) 150 { 151 return EFI_UNSUPPORTED; 152 } 153 154 /** 155 Routine process before the payload decoding. 156 157 @param[in] SessionCommon Pointer to ChildSa SessionCommon. 158 @param[in] PayloadBuf Pointer to the payload. 159 @param[in] PayloadSize Size of PayloadBuf in byte. 160 @param[in] PayloadType Type of Payload. 161 162 **/ 163 VOID 164 Ikev2ChildSaBeforeDecodePayload ( 165 IN UINT8 *SessionCommon, 166 IN UINT8 *PayloadBuf, 167 IN UINTN PayloadSize, 168 IN UINT8 PayloadType 169 ) 170 { 171 172 } 173 174 /** 175 Routine Process after the payload encoding. 176 177 @param[in] SessionCommon Pointer to ChildSa SessionCommon. 178 @param[in] PayloadBuf Pointer to the payload. 179 @param[in] PayloadSize Size of PayloadBuf in byte. 180 @param[in] PayloadType Type of Payload. 181 182 **/ 183 VOID 184 Ikev2ChildSaAfterEncodePayload ( 185 IN UINT8 *SessionCommon, 186 IN UINT8 *PayloadBuf, 187 IN UINTN PayloadSize, 188 IN UINT8 PayloadType 189 ) 190 { 191 } 192 193 IKEV2_PACKET_HANDLER mIkev2CreateChild = { 194 // 195 // Create Child 196 // 197 Ikev2CreateChildParser, 198 Ikev2CreateChildGenerator 199 }; 200
