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/** @file
The operations for Child SA.
Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "Utility.h"
/**
Generate IKE Packet for CREATE_CHILD_SA exchange.
This IKE Packet would be the packet for creating new CHILD SA, or the packet for
rekeying existing IKE SA, or the packet for existing CHILD SA.
@param[in] SaSession Pointer to related SA session.
@param[in] Context The data passed by the caller.
return a pointer of IKE packet.
**/
IKE_PACKET *
Ikev2CreateChildGenerator (
IN UINT8 *SaSession,
IN VOID *Context
)
{
IKEV2_CHILD_SA_SESSION *ChildSaSession;
IKEV2_SA_SESSION *IkeSaSession;
IKE_PACKET *IkePacket;
IKE_PAYLOAD *NotifyPayload;
UINT32 *MessageId;
NotifyPayload = NULL;
MessageId = NULL;
ChildSaSession = (IKEV2_CHILD_SA_SESSION *) SaSession;
if (ChildSaSession == NULL) {
return NULL;
}
IkePacket = IkePacketAlloc();
if (IkePacket == NULL) {
return NULL;
}
if (Context != NULL) {
MessageId = (UINT32 *) Context;
}
IkePacket->Header->Version = (UINT8) (2 << 4);
IkePacket->Header->NextPayload = IKEV2_PAYLOAD_TYPE_NOTIFY;
IkePacket->Header->ExchangeType = IKE_XCG_TYPE_CREATE_CHILD_SA;
if (ChildSaSession->SessionCommon.IkeSessionType == IkeSessionTypeChildSa) {
//
// 1.a Fill the IkePacket->Hdr
//
IkePacket->Header->InitiatorCookie = ChildSaSession->IkeSaSession->InitiatorCookie;
IkePacket->Header->ResponderCookie = ChildSaSession->IkeSaSession->ResponderCookie;
if (MessageId != NULL) {
IkePacket->Header->MessageId = *MessageId;
} else {
IkePacket->Header->MessageId = ChildSaSession->MessageId;
}
if (ChildSaSession->SessionCommon.IsInitiator) {
IkePacket->Header->Flags = IKE_HEADER_FLAGS_INIT;
}
} else {
IkeSaSession = (IKEV2_SA_SESSION *) SaSession;
//
// 1.a Fill the IkePacket->Hdr
//
IkePacket->Header->InitiatorCookie = IkeSaSession->InitiatorCookie;
IkePacket->Header->ResponderCookie = IkeSaSession->ResponderCookie;
if (MessageId != NULL) {
IkePacket->Header->MessageId = *MessageId;
} else {
IkePacket->Header->MessageId = IkeSaSession->MessageId;
}
if (IkeSaSession->SessionCommon.IsInitiator) {
IkePacket->Header->Flags = IKE_HEADER_FLAGS_INIT;
}
}
if (MessageId != NULL) {
IkePacket->Header->Flags |= IKE_HEADER_FLAGS_RESPOND;
}
//
// According to RFC4306, Chapter 4.
// A minimal implementation may support the CREATE_CHILD_SA exchange only to
// recognize requests and reject them with a Notify payload of type NO_ADDITIONAL_SAS.
//
NotifyPayload = Ikev2GenerateNotifyPayload (
0,
IKEV2_PAYLOAD_TYPE_NONE,
0,
IKEV2_NOTIFICATION_NO_ADDITIONAL_SAS,
NULL,
NULL,
0
);
if (NotifyPayload == NULL) {
IkePacketFree (IkePacket);
return NULL;
}
IKE_PACKET_APPEND_PAYLOAD (IkePacket, NotifyPayload);
//
// TODO: Support the CREATE_CHILD_SA exchange.
//
return IkePacket;
}
/**
Parse the IKE packet of CREATE_CHILD_SA exchange.
This function parse the IKE packet and save the related information to further
calculation.
@param[in] SaSession Pointer to IKEv2_CHILD_SA_SESSION related to this Exchange.
@param[in] IkePacket Received packet to be parsed.
@retval EFI_SUCCESS The IKE Packet is acceptable.
@retval EFI_UNSUPPORTED Not support the CREATE_CHILD_SA request.
**/
EFI_STATUS
Ikev2CreateChildParser (
IN UINT8 *SaSession,
IN IKE_PACKET *IkePacket
)
{
return EFI_UNSUPPORTED;
}
/**
Routine process before the payload decoding.
@param[in] SessionCommon Pointer to ChildSa SessionCommon.
@param[in] PayloadBuf Pointer to the payload.
@param[in] PayloadSize Size of PayloadBuf in byte.
@param[in] PayloadType Type of Payload.
**/
VOID
Ikev2ChildSaBeforeDecodePayload (
IN UINT8 *SessionCommon,
IN UINT8 *PayloadBuf,
IN UINTN PayloadSize,
IN UINT8 PayloadType
)
{
}
/**
Routine Process after the payload encoding.
@param[in] SessionCommon Pointer to ChildSa SessionCommon.
@param[in] PayloadBuf Pointer to the payload.
@param[in] PayloadSize Size of PayloadBuf in byte.
@param[in] PayloadType Type of Payload.
**/
VOID
Ikev2ChildSaAfterEncodePayload (
IN UINT8 *SessionCommon,
IN UINT8 *PayloadBuf,
IN UINTN PayloadSize,
IN UINT8 PayloadType
)
{
}
IKEV2_PACKET_HANDLER mIkev2CreateChild = {
//
// Create Child
//
Ikev2CreateChildParser,
Ikev2CreateChildGenerator
};
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