401 lines
13 KiB
C
401 lines
13 KiB
C
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//============================================================================//
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// MODULE: eapol.c //
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// //
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// Description: EAPOL/802.1X Parser //
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// //
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// Note: info for this parsers was gleaned from :
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// IEEE 802.1X
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// //
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// Modification History //
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// //
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// timmoore 04/04/2000 Created //
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//===========================================================================//
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#include "eapol.h"
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// the type of EAPOL packet
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LABELED_BYTE lbEAPOLCode[] =
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{
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{ EAPOL_PACKET, "Packet" },
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{ EAPOL_START, "Start" },
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{ EAPOL_LOGOFF, "Logoff" },
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{ EAPOL_KEY, "Key" },
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};
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SET EAPOLCodeSET = {(sizeof(lbEAPOLCode)/sizeof(LABELED_BYTE)), lbEAPOLCode };
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// property table
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PROPERTYINFO EAPOL_Prop[] = {
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//EAPOL_SUMMARY
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{ 0, 0,
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"Summary",
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"Summary of EAPOL packet",
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PROP_TYPE_SUMMARY,
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PROP_QUAL_NONE,
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NULL,
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80,
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EAPOL_FormatSummary
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},
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//EAPOL_VERSION
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{ 0, 0,
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"Version",
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"EAPOL packet type",
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PROP_TYPE_BYTE,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_TYPE
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{ 0, 0,
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"Type",
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"EAPOL packet type",
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PROP_TYPE_BYTE,
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PROP_QUAL_LABELED_SET,
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&EAPOLCodeSET,
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80,
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FormatPropertyInstance
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},
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//EAPOL_LENGTH
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{ 0, 0,
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"Length",
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"EAPOL length",
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PROP_TYPE_BYTESWAPPED_WORD,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_SIGNTYPE
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{ 0, 0,
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"Signature Type",
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"EAPOL Signature Type",
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PROP_TYPE_BYTE,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEYTYPE
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{ 0, 0,
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"Key Type",
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"EAPOL Key Type",
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PROP_TYPE_BYTE,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEYLENGTH
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{ 0, 0,
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"Length",
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"EAPOL Key length",
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PROP_TYPE_BYTESWAPPED_WORD,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_REPLAY
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{ 0, 0,
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"Replay",
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"EAPOL Replay Counter",
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PROP_TYPE_BYTE,
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PROP_QUAL_ARRAY,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEYIV
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{ 0, 0,
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"Key IV",
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"EAPOL Key IV",
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PROP_TYPE_BYTE,
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PROP_QUAL_ARRAY,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEYINDEX
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{ 0, 0,
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"Index",
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"EAPOL Key Index",
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PROP_TYPE_BYTE,
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PROP_QUAL_NONE,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEYSIGN
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{ 0, 0,
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"Key Signature",
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"EAPOL Key Signature",
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PROP_TYPE_BYTE,
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PROP_QUAL_ARRAY,
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NULL,
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80,
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FormatPropertyInstance
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},
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//EAPOL_KEY_KEY
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{ 0, 0,
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"Key",
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"EAPOL Key",
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PROP_TYPE_BYTE,
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PROP_QUAL_ARRAY,
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NULL,
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80,
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FormatPropertyInstance
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},
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};
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WORD NUM_EAPOL_PROPERTIES = sizeof(EAPOL_Prop) / sizeof(PROPERTYINFO);
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// Define the entry points that we will pass back at dll entry time...
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ENTRYPOINTS EAPOLEntryPoints =
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{
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// EAPOL Entry Points
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EAPOL_Register,
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EAPOL_Deregister,
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EAPOL_RecognizeFrame,
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EAPOL_AttachProperties,
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EAPOL_FormatProperties
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};
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// Globals -------------------------------------------------------------------
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HPROTOCOL hEAPOL = NULL;
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HPROTOCOL hEAP = NULL;
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//============================================================================
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// Function: EAPOL_Register
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//
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// Description: Create our property database and handoff sets.
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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void BHAPI EAPOL_Register( HPROTOCOL hEAPOL)
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{
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WORD i;
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// tell the kernel to make reserve some space for our property table
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CreatePropertyDatabase( hEAPOL, NUM_EAPOL_PROPERTIES);
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// add our properties to the kernel's database
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for( i = 0; i < NUM_EAPOL_PROPERTIES; i++)
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{
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AddProperty( hEAPOL, &EAPOL_Prop[i]);
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}
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hEAP = GetProtocolFromName("EAP");
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}
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//============================================================================
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// Function: EAPOL_Deregister
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//
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// Description: Destroy our property database and handoff set
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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VOID WINAPI EAPOL_Deregister( HPROTOCOL hEAPOL)
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{
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// tell the kernel that it may now free our database
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DestroyPropertyDatabase( hEAPOL);
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}
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//============================================================================
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// Function: EAPOL_RecognizeFrame
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//
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// Description: Determine whether we exist in the frame at the spot
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// indicated. We also indicate who (if anyone) follows us
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// and how much of the frame we claim.
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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ULPBYTE BHAPI EAPOL_RecognizeFrame( HFRAME hFrame,
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ULPBYTE pMacFrame,
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ULPBYTE pEAPOLFrame,
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DWORD MacType,
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DWORD BytesLeft,
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HPROTOCOL hPrevProtocol,
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DWORD nPrevProtOffset,
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LPDWORD pProtocolStatus,
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LPHPROTOCOL phNextProtocol,
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PDWORD_PTR InstData)
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{
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ULPEAPHDR pEAPOLHeader = (ULPEAPHDR)pEAPOLFrame;
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if(pEAPOLHeader->bType == EAPOL_START || pEAPOLHeader->bType == EAPOL_LOGOFF
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|| pEAPOLHeader->bType == EAPOL_KEY) {
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*pProtocolStatus = PROTOCOL_STATUS_CLAIMED;
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return NULL;
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}
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else {
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*phNextProtocol = hEAP;
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*pProtocolStatus = PROTOCOL_STATUS_NEXT_PROTOCOL;
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return pEAPOLFrame + 4;
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}
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}
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//============================================================================
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// Function: EAPOL_AttachProperties
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//
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// Description: Indicate where in the frame each of our properties live.
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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ULPBYTE BHAPI EAPOL_AttachProperties( HFRAME hFrame,
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ULPBYTE pMacFrame,
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ULPBYTE pEAPOLFrame,
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DWORD MacType,
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DWORD BytesLeft,
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HPROTOCOL hPrevProtocol,
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DWORD nPrevProtOffset,
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DWORD_PTR InstData)
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{
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ULPEAPHDR pEAPOLHeader = (ULPEAPHDR)pEAPOLFrame;
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// summary line
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_SUMMARY].hProperty,
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(WORD)BytesLeft,
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(ULPBYTE)pEAPOLFrame,
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0, 0, 0);
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// Version
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_VERSION].hProperty,
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sizeof(BYTE),
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&(pEAPOLHeader->bVersion),
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0, 1, 0);
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// EAPOL Type
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_TYPE].hProperty,
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sizeof(BYTE),
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&(pEAPOLHeader->bType),
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0, 1, 0);
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// Length
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_LENGTH].hProperty,
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sizeof(WORD),
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&(pEAPOLHeader->wLength),
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0, 1, 0);
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if(pEAPOLHeader->bType == EAPOL_KEY)
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{
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ULPEAPOLKEY pEAPOLKey = (ULPEAPOLKEY)&(pEAPOLHeader->pEAPPacket[0]);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_SIGNTYPE].hProperty,
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sizeof(BYTE),
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&(pEAPOLKey->bSignType),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYTYPE].hProperty,
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sizeof(BYTE),
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&(pEAPOLKey->bKeyType),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYLENGTH].hProperty,
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sizeof(WORD),
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&(pEAPOLKey->wKeyLength),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYREPLAY].hProperty,
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16,
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&(pEAPOLKey->bKeyReplay),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYIV].hProperty,
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16,
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&(pEAPOLKey->bKeyIV),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYINDEX].hProperty,
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sizeof(BYTE),
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&(pEAPOLKey->bKeyIndex),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEYSIGN].hProperty,
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16,
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&(pEAPOLKey->bKeySign),
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0, 1, 0);
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AttachPropertyInstance( hFrame,
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EAPOL_Prop[EAPOL_KEY_KEY].hProperty,
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XCHG(pEAPOLKey->wKeyLength),
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&(pEAPOLKey->bKey),
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0, 1, 0);
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}
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return NULL;
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}
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//============================================================================
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// Function: EAPOL_FormatProperties
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//
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// Description: Format the given properties on the given frame.
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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DWORD BHAPI EAPOL_FormatProperties( HFRAME hFrame,
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ULPBYTE pMacFrame,
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ULPBYTE pEAPOLFrame,
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DWORD nPropertyInsts,
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LPPROPERTYINST p)
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{
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// loop through the property instances
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while( nPropertyInsts-- > 0)
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{
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// and call the formatter for each
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( (FORMAT)(p->lpPropertyInfo->InstanceData) )( p);
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p++;
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}
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return NMERR_SUCCESS;
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}
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//============================================================================
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// Function: EAPOL_FormatSummary
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//
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// Description: The custom formatter for the summary property
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//
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// Modification History
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//
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// timmoore 04/04/2000 Created //
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//============================================================================
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VOID WINAPIV EAPOL_FormatSummary( LPPROPERTYINST pPropertyInst)
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{
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ULPBYTE pReturnedString = pPropertyInst->szPropertyText;
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ULPEAPHDR pEAPOLHeader = (ULPEAPHDR)(pPropertyInst->lpData);
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char* szTempString;
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// fetch the message type
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szTempString = LookupByteSetString( &EAPOLCodeSET, pEAPOLHeader->bType );
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if( szTempString == NULL )
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{
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wsprintf( pReturnedString, "Packet Type: Unknown");
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}
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else
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{
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pReturnedString += wsprintf( pReturnedString, "Packet: %s", szTempString );
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}
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}
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