109 lines
2.0 KiB
C++
109 lines
2.0 KiB
C++
#include "../StdAfx.h"
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#include "cryption.h"
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#include "SecurityTCP.h"
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SecurityTCP::SecurityTCP(void)
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{
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InitState();
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}
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SecurityTCP::~SecurityTCP(void)
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{
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}
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void SecurityTCP::InitState()
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{
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m_SndState.InitState();
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m_RcvState.InitState();
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}
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// Packet CheckSum
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void SecurityTCP::EncryptMsg( CPacket &rkPacket )
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{
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// Check Sum
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DWORD dwResult = MakeDigest( (BYTE*)rkPacket.GetBuffer(), rkPacket.GetBufferSize() );
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rkPacket.SetCheckSum( dwResult );
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// Encryption
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BYTE *pSrc;
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pSrc = (BYTE*)rkPacket.GetBuffer() + PK_CKSUM_ADDR;
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Encrypt( pSrc, rkPacket.GetBufferSize() - PK_CKSUM_ADDR );
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}
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void SecurityTCP::DecryptMsg( CPacket &rkPacket )
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{
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// Decryption
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BYTE *pSrc;
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pSrc = (BYTE*)rkPacket.GetBuffer() + PK_CKSUM_ADDR;
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Decrypt( pSrc, rkPacket.GetBufferSize() - PK_CKSUM_ADDR );
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}
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bool SecurityTCP::IsCheckSum( CPacket &rkPacket )
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{
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//Decrypt
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DecryptMsg( rkPacket );
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DWORD dwTemp = rkPacket.GetCheckSum(); //Àӽà ÀúÀå.
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rkPacket.SetCheckSum( 0 );
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DWORD dwResult = MakeDigest( (BYTE*)rkPacket.GetBuffer(), rkPacket.GetBufferSize() );
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rkPacket.SetCheckSum( dwTemp );
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// Check Sum
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return ( dwResult == rkPacket.GetCheckSum() );
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}
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// Packet Replay
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int SecurityTCP::GetSndState()
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{
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return m_SndState.GetState();
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}
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void SecurityTCP::UpdateSndState()
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{
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m_SndState.UpdateState();
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}
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int SecurityTCP::GetRcvState()
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{
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return m_RcvState.GetState();
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}
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void SecurityTCP::UpdateRcvState()
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{
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m_RcvState.UpdateState();
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}
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bool SecurityTCP::CheckState( CPacket &rkPacket )
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{
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if( GetRcvState() == MAGIC_TOKEN_FSM )
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{
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m_RcvState.SetState( rkPacket.GetState() );
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m_SndState.SetState( rkPacket.GetState() );
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UpdateSndState();
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}
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else
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{
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if( GetRcvState() != rkPacket.GetState() )
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return false;
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}
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UpdateRcvState();
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return true;
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}
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void SecurityTCP::PrepareMsg( CPacket &rkPacket )
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{
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rkPacket.SetState( GetSndState() );
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EncryptMsg( rkPacket );
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UpdateSndState();
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}
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void SecurityTCP::CompletionMsg( CPacket &rkPacket )
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{
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}
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