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windows-nt/Source/XPSP1/NT/net/layer2svc/eapol/service/elprotocol.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1999, Microsoft Corporation
Module Name:
elprotocol.c
Abstract:
This module implements functions related to EAPOL
protocol
Revision History:
sachins, Apr 30 2000, Created
--*/
#include "pcheapol.h"
#pragma hdrstop
//
// ElProcessReceivedPacket
//
// Description:
//
// Function called to process data received from the NDISUIO driver.
// The EAPOL packet is extracted and further processing is done.
//
//
// Arguments:
// pvContext - Context buffer which is a pointer to EAPOL_BUFFER structure
//
// Return Values:
//
DWORD
WINAPI
ElProcessReceivedPacket (
IN PVOID pvContext
)
{
EAPOL_PCB *pPCB = NULL;
EAPOL_BUFFER *pEapolBuffer = NULL;
DWORD dwLength = 0;
ETH_HEADER *pEthHdr = NULL;
EAPOL_PACKET *pEapolPkt = NULL;
DWORD dw8021PSize = 0;
PPP_EAP_PACKET *pEapPkt = NULL;
BYTE *pBuffer;
BOOLEAN ReqId = FALSE; // EAPOL state machine local variables
BOOLEAN ReqAuth = FALSE;
BOOLEAN EapSuccess = FALSE;
BOOLEAN EapFail = FALSE;
BOOLEAN RxKey = FALSE;
GUID DeviceGuid;
DWORD dwRetCode = NO_ERROR;
if (pvContext == NULL)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Critical error, Context is NULL");
return 0;
}
pEapolBuffer = (EAPOL_BUFFER *)pvContext;
pPCB = (EAPOL_PCB *)pEapolBuffer->pvContext;
dwLength = pEapolBuffer->dwBytesTransferred;
pBuffer = (BYTE *)pEapolBuffer->pBuffer;
TRACE1 (EAPOL, "ProcessReceivedPacket entered, length = %ld", dwLength);
ElParsePacket (pBuffer, dwLength, TRUE);
ACQUIRE_WRITE_LOCK (&(pPCB->rwLock));
do
{
// The Port was verified to be active before the workitem
// was queued. But do a double-check
// Validate packet length
// Should be atleast ETH_HEADER and first 4 required bytes of
// EAPOL_PACKET
if (dwLength < (sizeof(ETH_HEADER) + 4))
{
TRACE2 (EAPOL, "ProcessReceivedPacket: Packet length %ld is less than minimum required %d. Ignoring packet",
dwLength, (sizeof(ETH_HEADER) + 4));
dwRetCode = ERROR_INVALID_PACKET_LENGTH_OR_ID;
break;
}
// If the source address is same as the local MAC address, it is a
// multicast packet copy sent out being received
pEthHdr = (ETH_HEADER *)pBuffer;
if ((memcmp ((BYTE *)pEthHdr->bSrcAddr,
(BYTE *)pPCB->bSrcMacAddr,
SIZE_MAC_ADDR)) == 0)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Src MAC address of packet matches local address. Ignoring packet");
dwRetCode = ERROR_INVALID_ADDRESS;
break;
}
// Verify if the packet contains a 802.1P tag. If so, skip the 4 bytes
// after the src+dest mac addresses
if ((WireToHostFormat16(pBuffer + sizeof(ETH_HEADER)) == EAPOL_8021P_TAG_TYPE))
{
pEapolPkt = (EAPOL_PACKET *)(pBuffer + sizeof(ETH_HEADER) + 4);
dw8021PSize = 4;
}
else
{
pEapolPkt = (EAPOL_PACKET *)(pBuffer + sizeof(ETH_HEADER));
}
// Validate Ethernet type in the incoming packet
// It should be the same as the one defined for the
// current port
if (memcmp ((BYTE *)pEapolPkt->EthernetType, (BYTE *)pPCB->bEtherType,
SIZE_ETHERNET_TYPE) != 0)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Packet Ethernet type does not match expected type. Ignoring packet");
TRACE0 (EAPOL, "Incoming:");
EAPOL_DUMPBA ((BYTE *)pEapolPkt->EthernetType, SIZE_ETHERNET_TYPE);
TRACE0 (EAPOL, "Expected:");
EAPOL_DUMPBA ((BYTE *)pPCB->bEtherType, SIZE_ETHERNET_TYPE);
dwRetCode = ERROR_INVALID_PACKET_LENGTH_OR_ID;
break;
}
// EAPOL packet type should be valid
if ((pEapolPkt->PacketType != EAP_Packet) &&
(pEapolPkt->PacketType != EAPOL_Start) &&
(pEapolPkt->PacketType != EAPOL_Logoff) &&
(pEapolPkt->PacketType != EAPOL_Key))
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Invalid EAPOL packet type %d. Ignoring packet",
pEapolPkt->PacketType);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
if ((WireToHostFormat16(pEapolPkt->PacketBodyLength) > (MAX_PACKET_SIZE - (SIZE_ETHERNET_CRC + sizeof(ETH_HEADER) + dw8021PSize + FIELD_OFFSET (EAPOL_PACKET, PacketBody)))))
// ||
// (WireToHostFormat16(pEapolPkt->PacketBodyLength) != (dwLength - (sizeof(ETH_HEADER) + dw8021PSize + FIELD_OFFSET (EAPOL_PACKET, PacketBody)))))
{
TRACE3 (EAPOL, "ProcessReceivedPacket: Invalid length in EAPOL packet (%ld), Max length (%ld), Exact length (%ld), Ignoring packet",
WireToHostFormat16(pEapolPkt->PacketBodyLength),
(MAX_PACKET_SIZE - (SIZE_ETHERNET_CRC + sizeof(ETH_HEADER) + dw8021PSize + FIELD_OFFSET (EAPOL_PACKET, PacketBody))),
(dwLength - (sizeof(ETH_HEADER) + dw8021PSize + FIELD_OFFSET (EAPOL_PACKET, PacketBody)))
);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
// Determine the value of local EAPOL state variables
if (pEapolPkt->PacketType == EAP_Packet)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: EAP_Packet");
// Validate length of packet for EAP
// Should be atleast (ETH_HEADER+EAPOL_PACKET)
if (dwLength < (sizeof (ETH_HEADER) + dw8021PSize + FIELD_OFFSET (EAPOL_PACKET, PacketBody) + FIELD_OFFSET(PPP_EAP_PACKET, Data)))
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Invalid length of EAP packet %d. Ignoring packet",
dwLength);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
pEapPkt = (PPP_EAP_PACKET *)pEapolPkt->PacketBody;
if (WireToHostFormat16(pEapolPkt->PacketBodyLength) != WireToHostFormat16 (pEapPkt->Length))
{
TRACE2 (EAPOL, "ProcessReceivedPacket: Invalid length in EAPOL packet (%ld) not matching EAP length (%ld), Ignoring packet",
WireToHostFormat16(pEapolPkt->PacketBodyLength),
WireToHostFormat16 (pEapPkt->Length));
dwRetCode = ERROR_INVALID_PACKET;
break;
}
if (pEapPkt->Code == EAPCODE_Request)
{
// Validate length of packet for EAP-Request packet
// Should be atleast (ETH_HEADER+EAPOL_PACKET-1+PPP_EAP_PACKET)
if (dwLength < (sizeof (ETH_HEADER) + sizeof(EAPOL_PACKET)-1
+ sizeof (PPP_EAP_PACKET)))
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Invalid length of EAP Request packet %d. Ignoring packet",
dwLength);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
if (pEapPkt->Data[0] == EAPTYPE_Identity)
{
pPCB->fIsRemoteEndEAPOLAware = TRUE;
switch (pPCB->dwSupplicantMode)
{
case SUPPLICANT_MODE_0:
case SUPPLICANT_MODE_1:
// ignore
break;
case SUPPLICANT_MODE_2:
case SUPPLICANT_MODE_3:
pPCB->fEAPOLTransmissionFlag = TRUE;
break;
}
ReqId = TRUE;
}
else
{
ReqAuth = TRUE;
}
}
else if (pEapPkt->Code == EAPCODE_Success)
{
EapSuccess = TRUE;
}
else if (pEapPkt->Code == EAPCODE_Failure)
{
EapFail = TRUE;
}
else
{
// Invalid type
TRACE1 (EAPOL, "ProcessReceivedPacket: Invalid EAP packet type %d. Ignoring packet",
pEapPkt->Code);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
}
else
{
TRACE0 (EAPOL, "ProcessReceivedPacket: != EAP_Packet");
if (pEapolPkt->PacketType == EAPOL_Key)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: == EAPOL_Key");
RxKey = TRUE;
}
else
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Invalid packet type");
}
}
// State machine does not accept packets for inactive/disabled ports
if (!EAPOL_PORT_ACTIVE(pPCB))
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Port %ws not active",
pPCB->pwszDeviceGUID);
if (EAPOL_PORT_DISABLED(pPCB))
{
DbLogPCBEvent (DBLOG_CATEG_WARN, pPCB, EAPOL_NOT_ENABLED_PACKET_REJECTED);
}
break;
}
if (RxKey)
{
if ((dwRetCode = FSMKeyReceive (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
switch (pPCB->State)
{
// ReqId, ReqAuth, EapSuccess, EapFail, RxKey are inherently
// mutually exclusive
// No checks will be made to verify this
// Also, assumption is being made that in any state, maximum
// one timer may be active on the port.
case EAPOLSTATE_LOGOFF:
// Only a User Logon event can get the port out of
// LOGOFF state
TRACE0 (EAPOL, "ProcessReceivedPacket: LOGOFF state, Ignoring packet");
break;
case EAPOLSTATE_DISCONNECTED:
// Only a Media Connect / User logon / System reset event
// can get the port out of DISCONNECTED state
TRACE0 (EAPOL, "ProcessReceivedPacket: DISCONNECTED state, Ignoring packet");
break;
case EAPOLSTATE_CONNECTING:
TRACE0 (EAPOL, "ProcessReceivedPacket: EAPOLSTATE_CONNECTING");
if (EapSuccess)
{
if (!pPCB->fLocalEAPAuthSuccess)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Dropping invalid EAP-Success packet");
dwRetCode = ERROR_INVALID_PACKET;
break;
}
}
if (ReqId | EapSuccess | EapFail)
{
// Deactivate current timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
}
if (EapSuccess)
{
if ((dwRetCode = ElProcessEapSuccess (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
if (EapFail)
{
if ((dwRetCode = ElProcessEapFail (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
if (ReqId)
{
if ((dwRetCode = FSMAcquired (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
break;
case EAPOLSTATE_ACQUIRED:
TRACE0 (EAPOL, "ProcessReceivedPacket: EAPOLSTATE_ACQUIRED");
if (EapSuccess)
{
if (!pPCB->fLocalEAPAuthSuccess)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Dropping invalid EAP-Success packet");
dwRetCode = ERROR_INVALID_PACKET;
break;
}
}
if (ReqId | ReqAuth | EapSuccess | EapFail)
{
// Deactivate current timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
// Reset EapUI state
if (!ReqId)
{
pPCB->EapUIState &= ~EAPUISTATE_WAITING_FOR_IDENTITY;
}
}
if (EapSuccess)
{
if ((dwRetCode = ElProcessEapSuccess (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
if (EapFail)
{
if ((dwRetCode = ElProcessEapFail (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
if (ReqId)
{
if ((dwRetCode = FSMAcquired (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
if (ReqAuth)
{
if ((dwRetCode = FSMAuthenticating (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
break;
case EAPOLSTATE_AUTHENTICATING:
TRACE0 (EAPOL, "ProcessReceivedPacket: EAPOLSTATE_AUTHENTICATING");
// Common timer deletion
if (ReqAuth | ReqId | EapSuccess | EapFail)
{
// Deactivate current timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
if (ReqId)
{
if ((dwRetCode = FSMAcquired (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
{
if ((dwRetCode = FSMAuthenticating (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
// Reset EapUI state
if (!ReqAuth)
{
pPCB->EapUIState &= ~EAPUISTATE_WAITING_FOR_UI_RESPONSE;
}
}
// Continue further processing
if (EapSuccess | EapFail)
{
if (EapSuccess)
{
if (!pPCB->fLocalEAPAuthSuccess)
{
TRACE0 (EAPOL, "ProcessReceivedPacket: Dropping invalid EAP-Success packet");
dwRetCode = ERROR_INVALID_PACKET;
break;
}
}
// Auth timer will have restarted in FSMAuthenticating
// Deactivate the timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
// If the packet received was a EAP-Success, go into
// AUTHENTICATED state
if (EapSuccess)
{
if ((dwRetCode = ElProcessEapSuccess (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
// If the packet received was a EAP-Failure, go into
// HELD state
if (EapFail)
{
if ((dwRetCode = ElProcessEapFail (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
}
break;
case EAPOLSTATE_HELD:
TRACE0 (EAPOL, "ProcessReceivedPacket: HELD state, Ignoring packet");
if (ReqId)
{
// Deactivate current timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
if ((dwRetCode = FSMAcquired (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
break;
case EAPOLSTATE_AUTHENTICATED:
TRACE0 (EAPOL, "ProcessReceivedPacket: STATE_AUTHENTICATED");
if (ReqId)
{
if ((dwRetCode = FSMAcquired (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
else
{
if (EapFail)
{
if ((dwRetCode = ElProcessEapFail (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
}
}
break;
default:
TRACE0 (EAPOL, "ProcessReceivedPacket: Critical Error. Invalid state, Ignoring packet");
break;
}
} while (FALSE);
if (pEapolBuffer != NULL)
{
FREE (pEapolBuffer);
}
// Post a new read request, ignoring errors
if (EAPOL_PORT_DELETED(pPCB))
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Port %ws deleted, not reposting read request",
pPCB->pwszDeviceGUID);
}
else
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Reposting buffer on port %ws",
pPCB->pwszDeviceGUID);
// ElReadFromPort creates a new context buffer, adds a ref count,
// and posts the read request
if ((dwRetCode = ElReadFromPort (
pPCB,
NULL,
0
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ProcessReceivedPacket: Critical error: ElReadFromPort error %d",
dwRetCode);
}
}
RELEASE_WRITE_LOCK (&(pPCB->rwLock));
TRACE2 (EAPOL, "ProcessReceivedPacket: pPCB= %p, RefCnt = %ld",
pPCB, pPCB->dwRefCount);
// Dereference ref count held for the read that was just processed
EAPOL_DEREFERENCE_PORT(pPCB);
TRACE0 (EAPOL, "ProcessReceivedPacket exit");
InterlockedDecrement (&g_lWorkerThreads);
return 0;
}
//
// FSMDisconnected
//
// Description:
// Function called when media disconnect occurs
//
// Arguments:
// pPCB - Pointer to PCB for the port on which media disconnect occurs
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMDisconnected (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMDisconnected entered for port %ws", pPCB->pwszFriendlyName);
do
{
} while (FALSE);
TRACE1 (EAPOL, "Setting state DISCONNECTED for port %ws", pPCB->pwszFriendlyName);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_DISCONNECTED]);
pPCB->State = EAPOLSTATE_DISCONNECTED;
pPCB->EapUIState = 0;
// Free Identity buffer
if (pPCB->pszIdentity != NULL)
{
FREE (pPCB->pszIdentity);
pPCB->pszIdentity = NULL;
}
// Free Password buffer
if (pPCB->PasswordBlob.pbData != NULL)
{
FREE (pPCB->PasswordBlob.pbData);
pPCB->PasswordBlob.pbData = NULL;
pPCB->PasswordBlob.cbData = 0;
}
// Free user-specific data in the PCB
if (pPCB->pCustomAuthUserData != NULL)
{
FREE (pPCB->pCustomAuthUserData);
pPCB->pCustomAuthUserData = NULL;
}
// Free connection data, though it is common to all users
if (pPCB->pCustomAuthConnData != NULL)
{
FREE (pPCB->pCustomAuthConnData);
pPCB->pCustomAuthConnData = NULL;
}
pPCB->dwAuthFailCount = 0;
pPCB->fGotUserIdentity = FALSE;
if (pPCB->hUserToken != NULL)
{
if (!CloseHandle (pPCB->hUserToken))
{
dwRetCode = GetLastError ();
TRACE1 (EAPOL, "FSMDisconnected: CloseHandle failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
}
pPCB->hUserToken = NULL;
TRACE1 (EAPOL, "FSMDisconnected completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMLogoff
//
// Description:
// Function called to send out EAPOL_Logoff packet. Usually triggered by
// user logging off.
//
// Arguments:
// pPCB - Pointer to PCB for the port on which logoff packet is to be
// sent out
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMLogoff (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pDummy
)
{
EAPOL_PACKET *pEapolPkt = NULL;
BOOLEAN fAuthSendPacket = FALSE;
BOOLEAN fSupplicantSendPacket = FALSE;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMLogoff entered for port %ws", pPCB->pwszFriendlyName);
do
{
// End EAP session
ElEapEnd (pPCB);
// Send out EAPOL_Logoff conditionally
if ( ((pPCB->dwSupplicantMode == SUPPLICANT_MODE_2) &&
(pPCB->fEAPOLTransmissionFlag)) ||
(pPCB->dwSupplicantMode == SUPPLICANT_MODE_3))
{
fSupplicantSendPacket = TRUE;
}
switch (pPCB->dwEAPOLAuthMode)
{
case EAPOL_AUTH_MODE_0:
fAuthSendPacket = TRUE;
break;
case EAPOL_AUTH_MODE_1:
fAuthSendPacket = FALSE;
break;
case EAPOL_AUTH_MODE_2:
fAuthSendPacket = FALSE;
break;
}
if ((fSupplicantSendPacket) && (fAuthSendPacket))
{
// Allocate new buffer
pEapolPkt = (EAPOL_PACKET *) MALLOC (sizeof (EAPOL_PACKET));
if (pEapolPkt == NULL)
{
TRACE0 (EAPOL, "FSMLogoff: Error in allocating memory for EAPOL packet");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
// Fill in fields
memcpy ((BYTE *)pEapolPkt->EthernetType,
(BYTE *)pPCB->bEtherType,
SIZE_ETHERNET_TYPE);
pEapolPkt->ProtocolVersion = pPCB->bProtocolVersion;
pEapolPkt->PacketType = EAPOL_Logoff;
HostToWireFormat16 ((WORD)0, (BYTE *)pEapolPkt->PacketBodyLength);
// Send packet out on the port
dwRetCode = ElWriteToPort (pPCB,
(CHAR *)pEapolPkt,
sizeof (EAPOL_PACKET));
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMLogoff: Error in writing Logoff pkt to port %ld",
dwRetCode);
break;
}
// Mark that EAPOL_Logoff was sent out on the port
pPCB->dwLogoffSent = 1;
}
} while (FALSE);
TRACE1 (EAPOL, "Setting state LOGOFF for port %ws", pPCB->pwszFriendlyName);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_LOGOFF]);
pPCB->State = EAPOLSTATE_LOGOFF;
pPCB->EapUIState = 0;
// Release user token
if (pPCB->hUserToken != NULL)
{
if (!CloseHandle (pPCB->hUserToken))
{
dwRetCode = GetLastError ();
TRACE1 (EAPOL, "FSMLogoff: CloseHandle failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
}
pPCB->hUserToken = NULL;
// Free Identity buffer
if (pPCB->pszIdentity != NULL)
{
FREE (pPCB->pszIdentity);
pPCB->pszIdentity = NULL;
}
// Free Password buffer
if (pPCB->PasswordBlob.pbData != NULL)
{
FREE (pPCB->PasswordBlob.pbData);
pPCB->PasswordBlob.pbData = NULL;
pPCB->PasswordBlob.cbData = 0;
}
// Free user-specific data in the PCB
if (pPCB->pCustomAuthUserData != NULL)
{
FREE (pPCB->pCustomAuthUserData);
pPCB->pCustomAuthUserData = NULL;
}
pPCB->fGotUserIdentity = FALSE;
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
TRACE1 (EAPOL, "FSMLogoff completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMConnecting
//
// Description:
//
// Funtion called to send out EAPOL_Start packet. If MaxStart EAPOL_Start
// packets have been sent out, State Machine moves to Authenticated state
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which Start packet is
// to be sent out
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMConnecting (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pDummy
)
{
EAPOL_PACKET *pEapolPkt = NULL;
DWORD dwStartInterval = 0;
GUID DeviceGuid;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMConnecting entered for port %ws", pPCB->pwszFriendlyName);
do
{
// Flag that authentication has not completed in the EAP module
// on the client-side.
pPCB->fLocalEAPAuthSuccess = FALSE;
pPCB->dwLocalEAPAuthResult = NO_ERROR;
if (pPCB->State == EAPOLSTATE_CONNECTING)
{
// If PCB->State was Connecting earlier, increment ulStartCount
// else set ulStartCount to zero
// Did not receive Req/Id
if ((++(pPCB->ulStartCount)) > pPCB->EapolConfig.dwmaxStart)
{
// Deactivate start timer
RESTART_TIMER (pPCB->hTimer,
INFINITE_SECONDS,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
break;
}
TRACE0 (EAPOL, "FSMConnecting: Sent out maxStart with no response, Setting AUTHENTICATED state");
// Sent out enough EAPOL_Starts
// Go into authenticated state
if ((dwRetCode = FSMAuthenticated (pPCB,
pEapolPkt)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMConnecting: Error in FSMAuthenticated %ld",
dwRetCode);
break;
}
// No need to send out more EAPOL_Start packets
// Reset start packet count
pPCB->ulStartCount = 0;
pPCB->fIsRemoteEndEAPOLAware = FALSE;
break;
}
}
else
{
pPCB->ulStartCount++;
}
// Initialize the address of previously associated AP
// Only if the reauthentication goes through without getting
// into CONNECTING state, will a IP Renew *not* be done
ZeroMemory (pPCB->bPreviousDestMacAddr, SIZE_MAC_ADDR);
// If user is not logged in, send out EAPOL_Start packets
// at intervals of 1 second each. This is used to detect if the
// interface is on a secure network or not.
// If user is logged in, use the configured value for the
// StartPeriod as the interval
if (!g_fUserLoggedOn)
{
dwStartInterval = EAPOL_INIT_START_PERIOD; // 1 second
}
else
{
dwStartInterval = pPCB->EapolConfig.dwstartPeriod;
}
// Restart timer with startPeriod
// Even if error occurs, timeout will happen
// Else, we won't be able to get out of connecting state
RESTART_TIMER (pPCB->hTimer,
dwStartInterval,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMConnecting: Error in RESTART_TIMER %ld",
dwRetCode);
break;
}
// Send out EAPOL_Start conditionally
if (((pPCB->dwSupplicantMode == SUPPLICANT_MODE_2) &&
(pPCB->fEAPOLTransmissionFlag)) ||
(pPCB->dwSupplicantMode == SUPPLICANT_MODE_3))
{
// Send out EAPOL_Start
// Allocate new buffer
pEapolPkt = (EAPOL_PACKET *) MALLOC (sizeof(EAPOL_PACKET));
if (pEapolPkt == NULL)
{
TRACE0 (EAPOL, "FSMConnecting: Error in allocating memory for EAPOL packet");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
memcpy ((BYTE *)pEapolPkt->EthernetType,
(BYTE *)pPCB->bEtherType,
SIZE_ETHERNET_TYPE);
pEapolPkt->ProtocolVersion = pPCB->bProtocolVersion;
pEapolPkt->PacketType = EAPOL_Start;
HostToWireFormat16 ((WORD)0, (BYTE *)pEapolPkt->PacketBodyLength);
// Send packet out on the port
dwRetCode = ElWriteToPort (pPCB,
(CHAR *)pEapolPkt,
sizeof (EAPOL_PACKET));
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMConnecting: Error in writing Start Pkt to port %ld",
dwRetCode);
break;
}
}
TRACE1 (EAPOL, "Setting state CONNECTING for port %ws", pPCB->pwszFriendlyName);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_CONNECTING]);
pPCB->State = EAPOLSTATE_CONNECTING;
SET_EAPOL_START_TIMER(pPCB);
// Reset UI interaction state
pPCB->EapUIState = 0;
} while (FALSE);
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
}
TRACE1 (EAPOL, "FSMConnecting completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMAcquired
//
// Description:
// Function called when the port receives a EAP-Request/Identity packet.
// EAP processing of the packet occurs and a EAP-Response/Identity may
// be sent out by EAP if required.
//
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMAcquired (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
DWORD dwComputerNameLen = 0;
GUID DeviceGuid;
DWORD dwRetCode= NO_ERROR;
TRACE1 (EAPOL, "FSMAcquired entered for port %ws", pPCB->pwszFriendlyName);
do
{
// Flag that authentication has not completed in the EAP module
// on the client-side.
pPCB->fLocalEAPAuthSuccess = FALSE;
pPCB->dwLocalEAPAuthResult = NO_ERROR;
// Restart timer with authPeriod
// Even if there is error in processing, the authtimer timeout
// should happen
RESTART_TIMER (pPCB->hTimer,
pPCB->EapolConfig.dwauthPeriod,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAcquired: Error in RESTART_TIMER %ld",
dwRetCode);
break;
}
// Since an EAP Req-ID was received, reset EAPOL_Start count
pPCB->ulStartCount = 0;
// Flag that no EAPOL-Key transmit key was received
pPCB->fTransmitKeyReceived = FALSE;
// If current received EAP Id is the same the previous EAP Id
// send the last EAPOL packet again
if (((PPP_EAP_PACKET *)pEapolPkt->PacketBody)->Id ==
pPCB->dwPreviousId)
{
TRACE0 (EAPOL, "FSMAcquired: Re-xmitting EAP_Packet to port");
dwRetCode = ElWriteToPort (pPCB,
(CHAR *)pPCB->pbPreviousEAPOLPkt,
pPCB->dwSizeOfPreviousEAPOLPkt);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAcquired: Error in writing re-xmitted EAP_Packet to port %ld",
dwRetCode);
break;
}
}
else
{
// Indicate to EAP-Dll to cleanup any leftovers from earlier
// authentication. This is to take care of cases where errors
// occured in the earlier authentication and cleanup wasn't done
if ((dwRetCode = ElEapEnd (pPCB)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAcquired: Error in ElEapEnd = %ld",
dwRetCode);
break;
}
// Process the EAP packet
// ElEapWork will send out response if required
if (( dwRetCode = ElEapWork (
pPCB,
(PPP_EAP_PACKET *)pEapolPkt->PacketBody
)) != NO_ERROR)
{
// Ignore error if UI is waiting for input
if (dwRetCode != ERROR_IO_PENDING)
{
TRACE1 (EAPOL, "FSMAcquired: Error in ElEapWork %ld",
dwRetCode);
break;
}
else
{
dwRetCode = NO_ERROR;
}
}
}
TRACE1 (EAPOL, "Setting state ACQUIRED for port %ws", pPCB->pwszFriendlyName);
SET_EAPOL_AUTH_TIMER(pPCB);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_ACQUIRED]);
pPCB->State = EAPOLSTATE_ACQUIRED;
// ElNetmanNotify (pPCB, EAPOL_NCS_CRED_REQUIRED, NULL);
} while (FALSE);
TRACE1 (EAPOL, "FSMAcquired completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMAuthenticating
//
// Description:
//
// Function called when an non EAP-Request/Identity packet is received on the
// port. EAP processing of the data occurs.
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMAuthenticating (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
GUID DeviceGuid;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMAuthenticating entered for port %ws", pPCB->pwszFriendlyName);
do
{
// Restart timer with authPeriod
// Even if there is error in ElEapWork, the authtimer timeout
// should happen
RESTART_TIMER (pPCB->hTimer,
pPCB->EapolConfig.dwauthPeriod,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAuthenticating: Error in RESTART_TIMER %ld",
dwRetCode);
break;
}
// If current received EAP Id is the same the previous EAP Id
// send the last EAPOL packet again
// For EAPCODE_Success and EAPCODE_Failure, the value of id field
// will not be increment, Refer to EAP RFC
if ((((PPP_EAP_PACKET *)pEapolPkt->PacketBody)->Id
== pPCB->dwPreviousId) &&
(((PPP_EAP_PACKET *)pEapolPkt->PacketBody)->Code
!= EAPCODE_Success) &&
(((PPP_EAP_PACKET *)pEapolPkt->PacketBody)->Code
!= EAPCODE_Failure))
{
TRACE0 (EAPOL, "FSMAuthenticating: Re-xmitting EAP_Packet to port");
dwRetCode = ElWriteToPort (pPCB,
(CHAR *)pPCB->pbPreviousEAPOLPkt,
pPCB->dwSizeOfPreviousEAPOLPkt);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAuthenticating: Error in writing re-xmitted EAP_Packet to port = %ld",
dwRetCode);
break;
}
}
else
{
// Process the EAP packet
// ElEapWork will send out response if required
if (( dwRetCode = ElEapWork (
pPCB,
(PPP_EAP_PACKET *)pEapolPkt->PacketBody
)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAuthenticating: Error in ElEapWork %ld",
dwRetCode);
break;
}
}
TRACE1 (EAPOL, "Setting state AUTHENTICATING for port %ws", pPCB->pwszFriendlyName);
SET_EAPOL_AUTH_TIMER(pPCB);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_AUTHENTICATING]);
pPCB->State = EAPOLSTATE_AUTHENTICATING;
ElNetmanNotify (pPCB, EAPOL_NCS_AUTHENTICATING, NULL);
} while (FALSE);
TRACE1 (EAPOL, "FSMAuthenticating completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMHeld
//
// Description:
// Function called when a EAP-Failure packet is received in the
// Authenticating state. State machine is held for heldPeriod before
// re-authentication can occur.
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMHeld (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMHeld entered for port %ws", pPCB->pwszFriendlyName);
do
{
TRACE1 (EAPOL, "FSMHeld: EAP authentication failed with error 0x%x",
pPCB->dwLocalEAPAuthResult);
// Delete current credentials only if there is actually an error
// in the EAP module during processing.
// Ignore EAP-Failures arising out of session time-outs on AP,
// backend, etc.
if (pPCB->dwLocalEAPAuthResult != NO_ERROR)
{
pPCB->dwAuthFailCount++;
TRACE1 (EAPOL, "Restarting Held timer with time value = %ld",
pPCB->EapolConfig.dwheldPeriod);
TRACE1 (EAPOL, "FSMHeld: Setting state HELD for port %ws",
pPCB->pwszFriendlyName);
// Free Identity buffer
if (pPCB->pszIdentity != NULL)
{
FREE (pPCB->pszIdentity);
pPCB->pszIdentity = NULL;
}
// Free Password buffer
if (pPCB->PasswordBlob.pbData != NULL)
{
FREE (pPCB->PasswordBlob.pbData);
pPCB->PasswordBlob.pbData = NULL;
pPCB->PasswordBlob.cbData = 0;
}
// Free user-specific data in the PCB
if (pPCB->pCustomAuthUserData != NULL)
{
FREE (pPCB->pCustomAuthUserData);
pPCB->pCustomAuthUserData = NULL;
}
// Free connection data
if (pPCB->pCustomAuthConnData != NULL)
{
FREE (pPCB->pCustomAuthConnData);
pPCB->pCustomAuthConnData = NULL;
}
// Delete User Data stored in registry since it is invalid
if (pPCB->pSSID != NULL)
{
if ((dwRetCode = ElDeleteEapUserInfo (
pPCB->hUserToken,
pPCB->pwszDeviceGUID,
pPCB->dwEapTypeToBeUsed,
pPCB->pSSID->SsidLength,
pPCB->pSSID->Ssid
)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMHeld: ElDeleteEapUserInfo failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
}
else
{
if ((dwRetCode = ElDeleteEapUserInfo (
pPCB->hUserToken,
pPCB->pwszDeviceGUID,
pPCB->dwEapTypeToBeUsed,
0,
NULL
)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMHeld: ElDeleteEapUserInfo failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
}
// Since there has been an error in credentials, start afresh
// the authentication. Credentials may have changed e.g. certs
// may be renewed, MD5 credentials corrected etc.
pPCB->fGotUserIdentity = FALSE;
if (pPCB->hUserToken != NULL)
{
if (!CloseHandle (pPCB->hUserToken))
{
dwRetCode = GetLastError ();
TRACE1 (EAPOL, "FSMHeld: CloseHandle failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
}
pPCB->hUserToken = NULL;
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_EAP_AUTHENTICATION_FAILED, pPCB->dwLocalEAPAuthResult);
}
else
{
if (pPCB->State == EAPOLSTATE_ACQUIRED)
{
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_EAP_AUTHENTICATION_FAILED_ACQUIRED);
}
else
{
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_EAP_AUTHENTICATION_FAILED_DEFAULT);
}
}
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_HELD]);
pPCB->State = EAPOLSTATE_HELD;
TRACE1 (EAPOL, "FSMHeld: Port %ws set to HELD state",
pPCB->pwszDeviceGUID);
if (pPCB->dwLocalEAPAuthResult != NO_ERROR)
{
// If authfailed limit reached, go to Disconnected state
if (pPCB->dwAuthFailCount >= pPCB->dwTotalMaxAuthFailCount)
{
TRACE2 (EAPOL, "FSMHeld: Fail count (%ld) > Max fail count (%ld)",
pPCB->dwAuthFailCount, pPCB->dwTotalMaxAuthFailCount);
FSMDisconnected (pPCB, NULL);
break;
}
}
SET_EAPOL_HELD_TIMER(pPCB);
// Restart timer with heldPeriod
RESTART_TIMER (pPCB->hTimer,
pPCB->EapolConfig.dwheldPeriod,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "FSMHeld: Error in RESTART_TIMER %ld",
dwRetCode);
break;
}
} while (FALSE);
TRACE1 (EAPOL, "FSMHeld completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMAuthenticated
//
// Description:
//
// Function called when a EAP-Success packet is received or MaxStart
// EAPOL_Startpackets have been sent out, but no EAP-Request/Identity
// packets were received. If EAP-Success packet is request, DHCP client
// is restarted to get a new IP address.
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMAuthenticated (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
DHCP_PNP_CHANGE DhcpPnpChange;
WCHAR *pwszGUIDBuffer = NULL;
BOOLEAN fReAuthenticatedWithSamePeer = FALSE;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMAuthenticated entered for port %ws",
pPCB->pwszFriendlyName);
do
{
// Shutdown earlier EAP session
ElEapEnd (pPCB);
// Call DHCP only if state machine went through authentication
// If FSM is getting AUTHENTICATED by default, don't renew address
// Also, if reauthentication is happening with same peer, namely in
// wireless, don't renew address
#if 0
if (pPCB->PhysicalMediumType == NdisPhysicalMediumWirelessLan)
{
if (!memcmp (pPCB->bDestMacAddr, pPCB->bPreviousDestMacAddr,
SIZE_MAC_ADDR))
{
fReAuthenticatedWithSamePeer = TRUE;
}
else
{
memcpy (pPCB->bPreviousDestMacAddr, pPCB->bDestMacAddr,
SIZE_MAC_ADDR);
}
}
#endif
if ((pPCB->ulStartCount < pPCB->EapolConfig.dwmaxStart) &&
(!fReAuthenticatedWithSamePeer))
{
if ((pwszGUIDBuffer = MALLOC ((wcslen(pPCB->pwszDeviceGUID) + 1)*sizeof(WCHAR))) == NULL)
{
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
wcscpy (pwszGUIDBuffer, pPCB->pwszDeviceGUID);
InterlockedIncrement (&g_lWorkerThreads);
if (!QueueUserWorkItem (
(LPTHREAD_START_ROUTINE)ElIPPnPWorker,
(PVOID)pwszGUIDBuffer,
WT_EXECUTELONGFUNCTION
))
{
InterlockedDecrement (&g_lWorkerThreads);
FREE (pwszGUIDBuffer);
dwRetCode = GetLastError();
TRACE1 (PORT, "FSMAuthenticated: Critical error: QueueUserWorkItem failed with error %ld",
dwRetCode);
// Ignore DHCP error, it's outside 802.1X logic
dwRetCode = NO_ERROR;
}
else
{
TRACE0 (PORT, "FSMAuthenticated: Queued ElIPPnPWorker");
}
}
TRACE1 (EAPOL, "Setting state AUTHENTICATED for port %ws", pPCB->pwszFriendlyName);
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TRANSITION,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State],
EAPOLStates[EAPOLSTATE_AUTHENTICATED]);
if (pPCB->fLocalEAPAuthSuccess)
{
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_EAP_AUTHENTICATION_SUCCEEDED);
}
else
{
DbLogPCBEvent (DBLOG_CATEG_WARN, pPCB, EAPOL_EAP_AUTHENTICATION_DEFAULT);
}
pPCB->State = EAPOLSTATE_AUTHENTICATED;
// In case of Wireless LAN ensure that there is EAPOL_Key packets
// received for transmit key
if (pPCB->PhysicalMediumType == NdisPhysicalMediumWirelessLan)
{
if ((dwRetCode = ElSetEAPOLKeyReceivedTimer (pPCB)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMAuthenticated: ElSetEAPOLKeyReceivedTimer failed with error %ld",
dwRetCode);
break;
}
}
} while (FALSE);
TRACE1 (EAPOL, "FSMAuthenticated completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// FSMKeyReceive
//
// Description:
// Function called when an EAPOL-Key packet is received.
// The WEP key is decrypted and plumbed down to the NIC driver.
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
FSMKeyReceive (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
EAPOL_KEY_DESC *pKeyDesc = NULL;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "FSMKeyReceive entered for port %ws", pPCB->pwszFriendlyName);
do
{
pKeyDesc = (EAPOL_KEY_DESC *)pEapolPkt->PacketBody;
switch (pKeyDesc->DescriptorType)
{
case EAPOL_KEY_DESC_RC4:
if ((dwRetCode = ElKeyReceiveRC4 (pPCB,
pEapolPkt)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMKeyReceive: ElKeyReceiveRC4 failed with error %ld",
dwRetCode);
}
break;
#if 0
case EAPOL_KEY_DESC_PER_STA:
if ((dwRetCode = ElKeyReceivePerSTA (pPCB,
pEapolPkt)) != NO_ERROR)
{
TRACE1 (EAPOL, "FSMKeyReceive: ElKeyReceivePerSTA failed with error %ld",
dwRetCode);
}
break;
#endif
default:
dwRetCode = ERROR_INVALID_PARAMETER;
TRACE1 (EAPOL, "FSMKeyReceive: Invalid DescriptorType (%ld)",
pKeyDesc->DescriptorType);
break;
}
}
while (FALSE);
if (dwRetCode != NO_ERROR)
{
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB,
EAPOL_ERROR_PROCESSING_EAPOL_KEY, dwRetCode);
}
TRACE1 (EAPOL, "FSMKeyReceive completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
//
// ElKeyReceiveRC4
//
// Description:
// Function called when an EAPOL-Key packet is received
// with RC4 DescriptorType
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElKeyReceiveRC4 (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
EAPOL_KEY_DESC *pKeyDesc = NULL;
ULONGLONG ullReplayCheck = 0;
BYTE bReplayCheck[8];
BYTE *pbMD5EapolPkt = NULL;
DWORD dwMD5EapolPktLen = 0;
DWORD dwEapPktLen = 0;
DWORD dwIndex = 0;
BYTE bHMACMD5HashBuffer[MD5DIGESTLEN];
RC4_KEYSTRUCT rc4key;
BYTE bKeyBuffer[48];
BYTE *pbKeyToBePlumbed = NULL;
DWORD dwKeyLength = 0;
NDIS_802_11_WEP *pNdisWEPKey = NULL;
BYTE *pbMPPESendKey = NULL, *pbMPPERecvKey = NULL;
DWORD dwMPPESendKeyLength = 0, dwMPPERecvKeyLength = 0;
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "ElKeyReceiveRC4 entered for port %ws", pPCB->pwszFriendlyName);
do
{
if (WireToHostFormat16 (pEapolPkt->PacketBodyLength) < FIELD_OFFSET (EAPOL_KEY_DESC, Key))
{
TRACE0 (EAPOL, "ElKeyReceiveRC4: Invalid EAPOL-Key packet");
dwRetCode = ERROR_INVALID_PACKET;
break;
}
pKeyDesc = (EAPOL_KEY_DESC *)pEapolPkt->PacketBody;
dwKeyLength = WireToHostFormat16 (pKeyDesc->KeyLength);
if (WireToHostFormat16 (pEapolPkt->PacketBodyLength) > sizeof(EAPOL_KEY_DESC))
{
if (dwKeyLength != (WireToHostFormat16 (pEapolPkt->PacketBodyLength) - FIELD_OFFSET(EAPOL_KEY_DESC, Key)))
{
TRACE1 (EAPOL, "ElKeyReceiveRC4: Invalid Key Length in packet (%ld",
dwKeyLength);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
}
TRACE2 (EAPOL, "KeyLength = %ld, \n KeyIndex = %ld",
dwKeyLength,
pKeyDesc->KeyIndex
);
memcpy ((BYTE *)bReplayCheck,
(BYTE *)pKeyDesc->ReplayCounter,
8*sizeof(BYTE));
ullReplayCheck = ((((ULONGLONG)(*((PBYTE)(bReplayCheck)+0))) << 56) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+1))) << 48) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+2))) << 40) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+3))) << 32) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+4))) << 24) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+5))) << 16) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+6))) << 8) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+7)))));
//
// Check validity of Key message using the ReplayCounter field
// Verify if it is in sync with the last ReplayCounter value
// received
//
// TRACE0 (EAPOL, "ElKeyReceiveRC4: Original replay counter in desc ======");
// EAPOL_DUMPBA (pKeyDesc->ReplayCounter, 8);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: Converted incoming Replay counter ======= ");
// EAPOL_DUMPBA ((BYTE *)&ullReplayCheck, 8);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: Last Replay counter ======= ");
// EAPOL_DUMPBA ((BYTE *)&(pPCB->ullLastReplayCounter), 8);
if (ullReplayCheck <= pPCB->ullLastReplayCounter)
{
TRACE0 (EAPOL, "ElKeyReceiveRC4: Replay counter is not in sync, something is wrong");
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_INVALID_EAPOL_KEY);
break;
}
// If valid ReplayCounter, save it in the PCB for future check
pPCB->ullLastReplayCounter = ullReplayCheck;
//
// Verify if the MD5 hash generated on the EAPOL packet,
// with Signature nulled out, is the same as the signature
// Use the MPPERecv key as the secret
//
dwEapPktLen = WireToHostFormat16 (pEapolPkt->PacketBodyLength);
dwMD5EapolPktLen = sizeof (EAPOL_PACKET) - sizeof(pEapolPkt->EthernetType) - 1 + dwEapPktLen;
if ((pbMD5EapolPkt = (BYTE *) MALLOC (dwMD5EapolPktLen)) == NULL)
{
TRACE0 (EAPOL, "ElKeyReceiveRC4: Error in MALLOC for pbMD5EapolPkt");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
memcpy ((BYTE *)pbMD5EapolPkt, (BYTE *)pEapolPkt+sizeof(pEapolPkt->EthernetType), dwMD5EapolPktLen);
// Access the Master Send and Recv key stored locally
if ((dwRetCode = ElSecureDecodePw (
&(pPCB->MasterSecretSend),
&(pbMPPESendKey),
&dwMPPESendKeyLength
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElKeyReceiveRC4: ElSecureDecodePw failed for MasterSecretSend with error %ld",
dwRetCode);
break;
}
if ((dwRetCode = ElSecureDecodePw (
&(pPCB->MasterSecretRecv),
&(pbMPPERecvKey),
&dwMPPERecvKeyLength
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElKeyReceiveRC4: ElSecureDecodePw failed for MasterSecretRecv with error %ld",
dwRetCode);
break;
}
//
// Null out the signature in the key descriptor copy, to calculate
// the hash on the supplicant side
//
ZeroMemory ((BYTE *)(pbMD5EapolPkt
- sizeof(pEapolPkt->EthernetType) +
sizeof(EAPOL_PACKET) - 1 + // pEapolPkt->Body
sizeof(EAPOL_KEY_DESC)- // End of EAPOL_KEY_DESC
MD5DIGESTLEN-1), // Signature field
MD5DIGESTLEN);
(VOID) ElGetHMACMD5Digest (
pbMD5EapolPkt,
dwMD5EapolPktLen,
pbMPPERecvKey,
dwMPPERecvKeyLength,
bHMACMD5HashBuffer
);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: MD5 Hash body ==");
// EAPOL_DUMPBA (pbMD5EapolPkt, dwMD5EapolPktLen);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: MD5 Hash secret ==");
// EAPOL_DUMPBA (pbMPPERecvKey, dwMPPERecvKeyLength);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: MD5 Hash generated by Supplicant");
// EAPOL_DUMPBA (bHMACMD5HashBuffer, MD5DIGESTLEN);
// TRACE0 (EAPOL, "ElKeyReceiveRC4: Signature sent in EAPOL_KEY_DESC");
// EAPOL_DUMPBA (pKeyDesc->KeySignature, MD5DIGESTLEN);
//
// Check if HMAC-MD5 hash in received packet is what is expected
//
if (memcmp (bHMACMD5HashBuffer, pKeyDesc->KeySignature, MD5DIGESTLEN) != 0)
{
TRACE0 (EAPOL, "ElKeyReceiveRC4: Signature in Key Desc does not match");
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_INVALID_EAPOL_KEY);
break;
}
//
// Decrypt the multicast WEP key if it has been provided
//
// Check if there is Key Material (5/16 bytes) at the end of
// the Key Descriptor
if (WireToHostFormat16 (pEapolPkt->PacketBodyLength) > sizeof (EAPOL_KEY_DESC))
{
memcpy ((BYTE *)bKeyBuffer, (BYTE *)pKeyDesc->Key_IV, 16);
memcpy ((BYTE *)&bKeyBuffer[16], (BYTE *)pbMPPESendKey, dwMPPESendKeyLength);
rc4_key (&rc4key, 16 + dwMPPESendKeyLength, bKeyBuffer);
rc4 (&rc4key, dwKeyLength, pKeyDesc->Key);
// TRACE0 (EAPOL, " ========= The multicast key is ============= ");
// EAPOL_DUMPBA (pKeyDesc->Key, dwKeyLength);
// Use the unencrypted key in the Key Desc as the encryption key
pbKeyToBePlumbed = pKeyDesc->Key;
}
else
{
if (dwKeyLength > dwMPPESendKeyLength)
{
TRACE1 (EAPOL, "ElKeyReceiveRC4: Invalid Key Length in packet (%ld",
dwKeyLength);
dwRetCode = ERROR_INVALID_PACKET;
break;
}
// Use the MPPESend key as the encryption key
pbKeyToBePlumbed = (BYTE *)pbMPPESendKey;
}
if ((pNdisWEPKey = MALLOC ( sizeof(NDIS_802_11_WEP)-1+dwKeyLength ))
== NULL)
{
TRACE0 (EAPOL, "ElKeyReceiveRC4: MALLOC failed for pNdisWEPKey");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
pNdisWEPKey->Length = sizeof(NDIS_802_11_WEP) - 1 + dwKeyLength;
memcpy ((BYTE *)pNdisWEPKey->KeyMaterial, (BYTE *)pbKeyToBePlumbed,
dwKeyLength);
pNdisWEPKey->KeyLength = dwKeyLength;
// Create the long index out of the byte index got from AP
// If MSB in byte is set, set MSB in ulong format
if (pKeyDesc->KeyIndex & 0x80)
{
pNdisWEPKey->KeyIndex = 0x80000000;
}
else
{
pNdisWEPKey->KeyIndex = 0x00000000;
}
pNdisWEPKey->KeyIndex |= (pKeyDesc->KeyIndex & 0x03);
// TRACE1 (ANY, "ElKeyReceiveRC4: Key Index is %x", pNdisWEPKey->KeyIndex);
// Flag that transmit key was received
if (pKeyDesc->KeyIndex & 0x80)
{
pPCB->fTransmitKeyReceived = TRUE;
}
// Use NDISUIO to plumb the key to the driver
if ((dwRetCode = ElNdisuioSetOIDValue (
pPCB->hPort,
OID_802_11_ADD_WEP,
(BYTE *)pNdisWEPKey,
pNdisWEPKey->Length)) != NO_ERROR)
{
TRACE1 (PORT, "ElKeyReceiveRC4: ElNdisuioSetOIDValue failed with error %ld",
dwRetCode);
}
}
while (FALSE);
if (dwRetCode != NO_ERROR)
{
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB,
EAPOL_ERROR_PROCESSING_EAPOL_KEY, dwRetCode);
}
if (pbMD5EapolPkt != NULL)
{
FREE (pbMD5EapolPkt);
pbMD5EapolPkt = NULL;
}
if (pNdisWEPKey != NULL)
{
FREE (pNdisWEPKey);
pNdisWEPKey = NULL;
}
if (pbMPPESendKey != NULL)
{
FREE (pbMPPESendKey);
}
if (pbMPPERecvKey != NULL)
{
FREE (pbMPPERecvKey);
}
TRACE1 (EAPOL, "ElKeyReceiveRC4 completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
#if 0
//
// ElKeyReceivePerSTA
//
// Description:
// Function called when an EAPOL-Key packet is received
// with PerSTA DescriptorType
//
// Arguments:
// pPCB - Pointer to the PCB for the port on which data is being
// processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElKeyReceivePerSTA (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
EAPOL_KEY_DESC *pKeyDesc = NULL;
ULONGLONG ullReplayCheck = 0;
BYTE bReplayCheck[8];
BYTE *pbMD5EapolPkt = NULL;
DWORD dwMD5EapolPktLen = 0;
DWORD dwEapPktLen = 0;
DWORD dwIndex = 0;
BYTE bHMACMD5HashBuffer[MD5DIGESTLEN];
RC4_KEYSTRUCT rc4key;
BYTE bKeyBuffer[48];
BYTE *pbKeyToBePlumbed = NULL;
DWORD dwRandomLength = 0;
NDIS_802_11_WEP *pNdisWEPKey = NULL;
BYTE *pbMasterSecretSend = NULL;
DWORD dwMasterSecretSendLength = 0;
BYTE *pbMasterSecretRecv = NULL;
DWORD dwMasterSecretRecvLength = 0;
BYTE *pbDynamicSendKey = NULL, *pbDynamicRecvKey = NULL;
DWORD dwDynamicKeyLength = 0;
EAPOL_KEY_MATERIAL *pEapolKeyMaterial = NULL;
PBYTE pbPaddedKeyMaterial = NULL;
BOOLEAN fIsUnicastKey = FALSE;
SESSION_KEYS OldSessionKeys = {0};
SESSION_KEYS NewSessionKeys = {0};
DWORD dwRetCode = NO_ERROR;
TRACE1 (EAPOL, "ElKeyReceivePerSTA entered for port %ws", pPCB->pwszFriendlyName);
do
{
pKeyDesc = (EAPOL_KEY_DESC *)pEapolPkt->PacketBody;
dwDynamicKeyLength = WireToHostFormat16 (pKeyDesc->KeyLength);
// TRACE2 (EAPOL, "ElKeyReceivePerSTA: KeyLength = %ld, \n KeyIndex = %0x",
// dwDynamicKeyLength,
// pKeyDesc->KeyIndex
// );
memcpy ((BYTE *)bReplayCheck,
(BYTE *)pKeyDesc->ReplayCounter,
8*sizeof(BYTE));
ullReplayCheck = ((((ULONGLONG)(*((PBYTE)(bReplayCheck)+0))) << 56) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+1))) << 48) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+2))) << 40) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+3))) << 32) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+4))) << 24) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+5))) << 16) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+6))) << 8) +
(((ULONGLONG)(*((PBYTE)(bReplayCheck)+7)))));
// Check validity of Key message using the ReplayCounter field
// Verify if it is in sync with the last ReplayCounter value
// received
// TRACE0 (EAPOL, "Original replay counter in desc ======");
// EAPOL_DUMPBA (pKeyDesc->ReplayCounter, 8);
// TRACE0 (EAPOL, "Converted incoming Replay counter ======= ");
// EAPOL_DUMPBA ((BYTE *)&ullReplayCheck, 8);
// TRACE0 (EAPOL, "Last Replay counter ======= ");
// EAPOL_DUMPBA ((BYTE *)&(pPCB->ullLastReplayCounter), 8);
if (ullReplayCheck <= pPCB->ullLastReplayCounter)
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Replay counter is not in sync, something is wrong");
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_INVALID_EAPOL_KEY);
break;
}
// If valid ReplayCounter, save it in the PCB for future check
pPCB->ullLastReplayCounter = ullReplayCheck;
// Verify if the MD5 hash generated on the EAPOL packet,
// with Signature nulled out, is the same as the signature
// Use the MPPERecv key as the secret
dwEapPktLen = WireToHostFormat16 (pEapolPkt->PacketBodyLength);
dwMD5EapolPktLen = sizeof (EAPOL_PACKET) - sizeof(pEapolPkt->EthernetType) - 1 + dwEapPktLen;
if ((pbMD5EapolPkt = (BYTE *) MALLOC (dwMD5EapolPktLen)) == NULL)
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Error in MALLOC for pbMD5EapolPkt");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
memcpy ((BYTE *)pbMD5EapolPkt, (BYTE *)pEapolPkt+sizeof(pEapolPkt->EthernetType), dwMD5EapolPktLen);
// Query Master Secrets
if (dwRetCode = ElQueryMasterKeys (
pPCB,
&OldSessionKeys
) != NO_ERROR)
{
TRACE1 (EAPOL, "ElKeyReceivePerSTA: ElQueryMasterKeys failed with error %ld",
dwRetCode);
break;
}
pbMasterSecretSend = OldSessionKeys.bSendKey;
pbMasterSecretRecv = OldSessionKeys.bReceiveKey;
dwMasterSecretSendLength = OldSessionKeys.dwKeyLength;
dwMasterSecretRecvLength = OldSessionKeys.dwKeyLength;
// Null out the signature in the key descriptor copy, to calculate
// the hash on the supplicant side
ZeroMemory ((BYTE *)(pbMD5EapolPkt
- sizeof(pEapolPkt->EthernetType) +
sizeof(EAPOL_PACKET) - 1 + // pEapolPkt->Body
sizeof(EAPOL_KEY_DESC)- // End of EAPOL_KEY_DESC
MD5DIGESTLEN-1), // Signature field
MD5DIGESTLEN);
(VOID) ElGetHMACMD5Digest (
pbMD5EapolPkt,
dwMD5EapolPktLen,
pbMasterSecretRecv,
dwMasterSecretRecvLength,
bHMACMD5HashBuffer
);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: MD5 Hash body ==");
// EAPOL_DUMPBA (pbMD5EapolPkt, dwMD5EapolPktLen);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: MD5 Hash secret ==");
// EAPOL_DUMPBA (pbMasterSecretRecv, dwMasterSecretRecvLength);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: MD5 Hash generated by Supplicant");
// EAPOL_DUMPBA (bHMACMD5HashBuffer, MD5DIGESTLEN);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: Signature sent in EAPOL_KEY_DESC");
// EAPOL_DUMPBA (pKeyDesc->KeySignature, MD5DIGESTLEN);
// Check if HMAC-MD5 hash in received packet is what is expected
if (memcmp (bHMACMD5HashBuffer, pKeyDesc->KeySignature, MD5DIGESTLEN) != 0)
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Signature in Key Descriptor does not match");
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_INVALID_EAPOL_KEY);
break;
}
if (pKeyDesc->KeyIndex & 0x80)
{
fIsUnicastKey = TRUE;
}
// Decrypt the random value if it has been provided
if (WireToHostFormat16 (pEapolPkt->PacketBodyLength) > sizeof (EAPOL_KEY_DESC))
{
DWORD dwKeyMaterialLength = 0;
dwKeyMaterialLength = WireToHostFormat16 (pEapolPkt->PacketBodyLength) - FIELD_OFFSET(EAPOL_KEY_DESC, Key);
// TRACE1 (EAPOL, "ElKeyReceivePerSTA: KeyMaterialLength = %ld",
// dwKeyMaterialLength);
memcpy ((BYTE *)bKeyBuffer, (BYTE *)pKeyDesc->Key_IV, KEY_IV_LENGTH);
memcpy ((BYTE *)&bKeyBuffer[KEY_IV_LENGTH], (BYTE *)pbMasterSecretSend,
dwMasterSecretSendLength);
pEapolKeyMaterial = (PEAPOL_KEY_MATERIAL)pKeyDesc->Key;
dwRandomLength = WireToHostFormat16 (pEapolKeyMaterial->KeyMaterialLength);
if ((pbPaddedKeyMaterial = (PBYTE)MALLOC (RC4_PAD_LENGTH + dwKeyMaterialLength)) == NULL)
{
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
memcpy (pbPaddedKeyMaterial+RC4_PAD_LENGTH, pEapolKeyMaterial->KeyMaterial, dwKeyMaterialLength);
rc4_key (&rc4key, KEY_IV_LENGTH+dwMasterSecretSendLength, bKeyBuffer);
rc4 (&rc4key, dwKeyMaterialLength+RC4_PAD_LENGTH, pbPaddedKeyMaterial);
// Ignore leading padded RC4_PAD_LENGTH bytes
memcpy (pEapolKeyMaterial->KeyMaterial, pbPaddedKeyMaterial+RC4_PAD_LENGTH, dwKeyMaterialLength);
// TRACE1 (EAPOL, "ElKeyReceivePerSTA: Randomlength = %ld",
// dwRandomLength);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: ========= The random material is ============= ");
// EAPOL_DUMPBA (pEapolKeyMaterial->KeyMaterial, dwRandomLength);
}
else
{
// No random material sent
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Did not find random material: Exiting");
dwRetCode = ERROR_INVALID_PARAMETER;
break;
}
if (fIsUnicastKey)
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Received Per-STA Unicast key material Random");
// Generate dynamic keys
if (dwRetCode = GenerateDynamicKeys (
pbMasterSecretSend,
dwMasterSecretSendLength,
pEapolKeyMaterial->KeyMaterial,
dwRandomLength,
dwDynamicKeyLength,
&NewSessionKeys
) != NO_ERROR)
{
TRACE1 (EAPOL, "ElKeyReceivePerSTA: ElGenerateDynamicKeys failed with error %ld",
dwRetCode);
break;
}
pbDynamicSendKey = NewSessionKeys.bSendKey;
pbDynamicRecvKey = NewSessionKeys.bReceiveKey;
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: Derived Send Key");
// EAPOL_DUMPBA (pbDynamicSendKey, dwDynamicKeyLength);
// TRACE0 (EAPOL, "ElKeyReceivePerSTA: Derived Recv Key");
// EAPOL_DUMPBA (pbDynamicRecvKey, dwDynamicKeyLength);
// Update Master Secrets
if (dwRetCode = ElSetMasterKeys (
pPCB,
&NewSessionKeys
) != NO_ERROR)
{
// Cannot do much about this error than proceed
TRACE1 (EAPOL, "ElKeyReceivePerSTA: ElSetMasterKeys failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
pbKeyToBePlumbed = pbDynamicSendKey;
}
else
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: Received Per-STA BROADCAST key material");
if (dwRandomLength != dwDynamicKeyLength)
{
TRACE2 (EAPOL, "ElKeyReceivePerSTA: KeyLength (%ld) != KeyMaterialLength (%ld), Inconsistent. Will consider only KeyMaterial length !",
dwDynamicKeyLength, dwRandomLength);
}
dwDynamicKeyLength = dwRandomLength;
pbKeyToBePlumbed = pEapolKeyMaterial->KeyMaterial;
}
if ((pNdisWEPKey = MALLOC ( sizeof(NDIS_802_11_WEP)-1+dwDynamicKeyLength ))
== NULL)
{
TRACE0 (EAPOL, "ElKeyReceivePerSTA: MALLOC failed for pNdisWEPKey");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
break;
}
pNdisWEPKey->Length = sizeof(NDIS_802_11_WEP) - 1 + dwDynamicKeyLength;
memcpy ((BYTE *)pNdisWEPKey->KeyMaterial, (BYTE *)pbKeyToBePlumbed,
dwDynamicKeyLength);
pNdisWEPKey->KeyLength = dwDynamicKeyLength;
// Create the long index out of the byte index got from AP
// If MSB in byte is set, set MSB in ulong format
if (pKeyDesc->KeyIndex & 0x80)
{
pNdisWEPKey->KeyIndex = 0x80000000;
}
else
{
pNdisWEPKey->KeyIndex = 0x00000000;
}
pNdisWEPKey->KeyIndex |= (pKeyDesc->KeyIndex & 0x03);
// Use NDISUIO to plumb the key to the driver
if ((dwRetCode = ElNdisuioSetOIDValue (
pPCB->hPort,
OID_802_11_ADD_WEP,
(BYTE *)pNdisWEPKey,
pNdisWEPKey->Length)) != NO_ERROR)
{
TRACE1 (PORT, "ElKeyReceivePerSTA: ElNdisuioSetOIDValue failed with error %ld",
dwRetCode);
}
}
while (FALSE);
if (dwRetCode != NO_ERROR)
{
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB,
EAPOL_ERROR_PROCESSING_EAPOL_KEY, dwRetCode);
}
if (pbMD5EapolPkt != NULL)
{
FREE (pbMD5EapolPkt);
pbMD5EapolPkt = NULL;
}
if (pNdisWEPKey != NULL)
{
FREE (pNdisWEPKey);
pNdisWEPKey = NULL;
}
if (pbPaddedKeyMaterial != NULL)
{
FREE (pbPaddedKeyMaterial);
}
TRACE1 (EAPOL, "ElKeyReceivePerSTA completed for port %ws", pPCB->pwszFriendlyName);
return dwRetCode;
}
#endif
//
// ElTimeoutCallbackRoutine
//
// Description:
//
// Function called when any timer work item queued on the global timer
// queue expires. Depending on the state in which the port is when the timer
// expires, the port moves to the next state.
//
// Arguments:
// pvContext - Pointer to context. In this case, it is pointer to a PCB
// fTimerOfWaitFired - Unused
//
// Return values:
//
VOID
ElTimeoutCallbackRoutine (
IN PVOID pvContext,
IN BOOLEAN fTimerOfWaitFired
)
{
EAPOL_PCB *pPCB;
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine entered");
do
{
// Context should not be NULL
if (pvContext == NULL)
{
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine: pvContext is NULL. Invalid timeout callback");
break;
}
// PCB is guaranteed to exist until all timers are fired
// Verify if Port is still active
pPCB = (EAPOL_PCB *)pvContext;
ACQUIRE_WRITE_LOCK (&(pPCB->rwLock));
if (!EAPOL_PORT_ACTIVE(pPCB))
{
// Port is not active
RELEASE_WRITE_LOCK (&(pPCB->rwLock));
TRACE1 (PORT, "ElTimeoutCallbackRoutine: Port %ws is inactive",
pPCB->pwszDeviceGUID);
break;
}
DbLogPCBEvent (DBLOG_CATEG_INFO, pPCB, EAPOL_STATE_TIMEOUT,
EAPOLStates[((pPCB->State < EAPOLSTATE_LOGOFF) || (pPCB->State > EAPOLSTATE_AUTHENTICATED))?EAPOLSTATE_UNDEFINED:pPCB->State]);
// Check the current state of the state machine
// We can do additional checks such as flagging which timer was fired
// and in the timeout checking if the PCB state has remained the same
// Else bail out
switch (pPCB->State)
{
case EAPOLSTATE_CONNECTING:
if (!EAPOL_START_TIMER_SET(pPCB))
{
TRACE1 (EAPOL, "ElTimeoutCallbackRoutine: Wrong timeout %ld in Connecting state", CHECK_EAPOL_TIMER(pPCB));
break;
}
pPCB->dwTimerFlags &= ~EAPOL_START_TIMER;
FSMConnecting(pPCB, NULL);
break;
case EAPOLSTATE_ACQUIRED:
if (!EAPOL_AUTH_TIMER_SET(pPCB))
{
TRACE1 (EAPOL, "ElTimeoutCallbackRoutine: Wrong timeout %ld in Acquired state", CHECK_EAPOL_TIMER(pPCB));
break;
}
pPCB->dwTimerFlags &= ~EAPOL_AUTH_TIMER;
FSMConnecting(pPCB, NULL);
break;
case EAPOLSTATE_AUTHENTICATING:
if (!EAPOL_AUTH_TIMER_SET(pPCB))
{
TRACE1 (EAPOL, "ElTimeoutCallbackRoutine: Wrong timeout %ld in Authenticating state", CHECK_EAPOL_TIMER(pPCB));
break;
}
pPCB->dwTimerFlags &= ~EAPOL_AUTH_TIMER;
FSMConnecting(pPCB, NULL);
break;
case EAPOLSTATE_AUTHENTICATED:
if (!EAPOL_TRANSMIT_KEY_TIMER_SET(pPCB))
{
TRACE1 (EAPOL, "ElTimeoutCallbackRoutine: Wrong timeout %ld in Authenticated state", CHECK_EAPOL_TIMER(pPCB));
break;
}
pPCB->dwTimerFlags &= ~EAPOL_TRANSMIT_KEY_TIMER;
ElVerifyEAPOLKeyReceived(pPCB);
break;
case EAPOLSTATE_HELD:
if (!EAPOL_HELD_TIMER_SET(pPCB))
{
TRACE1 (EAPOL, "ElTimeoutCallbackRoutine: Wrong timeout %ld in Held state", CHECK_EAPOL_TIMER(pPCB));
break;
}
// Go through logoff, since new user will be tried
// for next cycle
// Debatable !
if (!(pPCB->dwAuthFailCount % EAPOL_MAX_AUTH_FAIL_COUNT))
{
// FSMLogoff (pPCB, NULL);
}
FSMConnecting(pPCB, NULL);
break;
case EAPOLSTATE_DISCONNECTED:
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine: No action in Disconnected state");
break;
case EAPOLSTATE_LOGOFF:
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine: No action in Logoff state");
break;
default:
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine: Critical Error. Invalid state after timer expires ");
break;
}
RELEASE_WRITE_LOCK (&(pPCB->rwLock));
} while (FALSE);
TRACE0 (EAPOL, "ElTimeoutCallbackRoutine completed");
return;
}
//
// ElEapWork
//
// Description:
//
// Function called when an EAPOL packet of type EAP_Packet is received
// The EAP packet is passed to the EAP module for processing.
// Depending on the result of the processing, a EAP Response packet
// is sent or the incoming packet is ignored.
//
// Input arguments:
// pPCB - Pointer to PCB for the port on which data is being processed
// pRecvPkt - Pointer to EAP packet in the data received from the remote end
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
//
// ISSUE: Rewrite with do {} while(FALSE)
//
DWORD
ElEapWork (
IN EAPOL_PCB *pPCB,
IN PPP_EAP_PACKET *pRecvPkt
)
{
DWORD dwLength = 0;
ELEAP_RESULT EapResult;
PPP_EAP_PACKET *pSendPkt;
EAPOL_PACKET *pEapolPkt;
GUID DeviceGuid;
DWORD dwReceivedId = 0;
DWORD cbData = 0;
BYTE *pbAuthData = NULL;
DWORD dwRetCode = NO_ERROR;
//
// If the protocol has not been started yet, call ElEapBegin
//
if (!(pPCB->fEapInitialized))
{
if ((dwRetCode = ElEapBegin (pPCB)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElEapWork: Error in ElEapBegin = %ld", dwRetCode);
return dwRetCode;
}
}
ZeroMemory(&EapResult, sizeof(EapResult));
// Create buffer for EAPOL + EAP and pass pointer to EAP header
pEapolPkt = (EAPOL_PACKET *) MALLOC (MAX_EAPOL_BUFFER_SIZE);
TRACE1 (EAPOL, "ElEapWork: EapolPkt created at %p", pEapolPkt);
if (pEapolPkt == NULL)
{
TRACE0 (EAPOL, "ElEapWork: Error allocating EAP buffer");
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
return dwRetCode;
}
// Point to EAP header
pSendPkt = (PPP_EAP_PACKET *)((PBYTE)pEapolPkt + sizeof (EAPOL_PACKET) - 1);
if (pRecvPkt != NULL)
{
dwReceivedId = pRecvPkt->Id;
}
dwRetCode = ElEapMakeMessage (pPCB,
pRecvPkt,
pSendPkt,
MAX_EAPOL_BUFFER_SIZE
- sizeof(EAPOL_PACKET) - 1,
&EapResult
);
// Notification message for the user
if (NULL != EapResult.pszReplyMessage)
{
// Free earlier notication with the PCB
if (pPCB->pwszEapReplyMessage != NULL)
{
FREE (pPCB->pwszEapReplyMessage);
pPCB->pwszEapReplyMessage = NULL;
}
pPCB->pwszEapReplyMessage =
(WCHAR *)MALLOC ((strlen(EapResult.pszReplyMessage)+1) * sizeof(WCHAR));
if (pPCB->pwszEapReplyMessage == NULL)
{
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
TRACE0 (EAPOL, "ElEapWork: MALLOC failed for pwszEapReplyMessage");
FREE (EapResult.pszReplyMessage);
FREE (pEapolPkt);
pEapolPkt = NULL;
return dwRetCode;
}
if (0 == MultiByteToWideChar (
CP_ACP,
0,
EapResult.pszReplyMessage,
-1,
pPCB->pwszEapReplyMessage,
strlen(EapResult.pszReplyMessage)+1))
{
dwRetCode = GetLastError();
TRACE2 (EAPOL,"ElEapWork: MultiByteToWideChar(%s) failed for pwszEapReplyMessage with error (%ld)",
EapResult.pszReplyMessage,
dwRetCode);
FREE (EapResult.pszReplyMessage);
FREE (pEapolPkt);
pEapolPkt = NULL;
return dwRetCode;
}
ElNetmanNotify (pPCB, EAPOL_NCS_NOTIFICATION, NULL);
TRACE1 (EAPOL, "ElEapWork: Notified user of EAP data = %ws",
pPCB->pwszEapReplyMessage);
FREE (EapResult.pszReplyMessage);
}
if (dwRetCode != NO_ERROR)
{
switch (dwRetCode)
{
case ERROR_PPP_INVALID_PACKET:
TRACE0 (EAPOL, "ElEapWork: Silently discarding invalid auth packet");
break;
default:
TRACE1 (EAPOL, "ElEapWork: ElEapMakeMessage returned error %ld",
dwRetCode);
// NotifyCallerOfFailure (pPCB, dwRetCode);
break;
}
// Free up memory reserved for packet
FREE (pEapolPkt);
pEapolPkt = NULL;
return dwRetCode;
}
//
// Check to see if we have to save any user data
//
if (EapResult.fSaveUserData)
{
// Save to Registry
if ((dwRetCode = ElSetEapUserInfo (
pPCB->hUserToken,
pPCB->pwszDeviceGUID,
pPCB->dwEapTypeToBeUsed,
(pPCB->pSSID)?pPCB->pSSID->SsidLength:0,
(pPCB->pSSID)?pPCB->pSSID->Ssid:NULL,
EapResult.pUserData,
EapResult.dwSizeOfUserData)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElEapWork: ElSetEapUserInfo failed with error = %d",
dwRetCode);
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
return dwRetCode;
}
// Save to PCB context
if (pPCB->pCustomAuthUserData != NULL)
{
FREE (pPCB->pCustomAuthUserData);
pPCB->pCustomAuthUserData = NULL;
}
pPCB->pCustomAuthUserData = MALLOC (EapResult.dwSizeOfUserData + sizeof (DWORD));
if (pPCB->pCustomAuthUserData == NULL)
{
TRACE1 (EAPOL, "ElEapWork: Error in allocating memory for pCustomAuthUserData = %ld",
dwRetCode);
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
return dwRetCode;
}
pPCB->pCustomAuthUserData->dwSizeOfCustomAuthData = EapResult.dwSizeOfUserData;
if ((EapResult.dwSizeOfUserData != 0) && (EapResult.pUserData != NULL))
{
memcpy ((BYTE *)pPCB->pCustomAuthUserData->pbCustomAuthData,
(BYTE *)EapResult.pUserData,
EapResult.dwSizeOfUserData);
}
TRACE0 (EAPOL, "ElEapWork: Saved EAP data for user");
}
//
// Check to see if we have to save any connection data
//
pbAuthData = EapResult.SetCustomAuthData.pConnectionData;
cbData = EapResult.SetCustomAuthData.dwSizeOfConnectionData;
if ((EapResult.fSaveConnectionData ) &&
( 0 != cbData ) )
{
// Save to registry
if ((dwRetCode = ElSetCustomAuthData (
pPCB->pwszDeviceGUID,
pPCB->dwEapTypeToBeUsed,
(pPCB->pSSID)?pPCB->pSSID->SsidLength:0,
(pPCB->pSSID)?pPCB->pSSID->Ssid:NULL,
pbAuthData,
&cbData
)) != NO_ERROR)
{
TRACE1 ( EAPOL, "ElEapWork: ElSetCustomAuthData failed with error = %d",
dwRetCode);
FREE (pEapolPkt);
pEapolPkt = NULL;
return dwRetCode;
}
// Save to PCB context
if (pPCB->pCustomAuthConnData != NULL)
{
FREE (pPCB->pCustomAuthConnData);
pPCB->pCustomAuthConnData = NULL;
}
pPCB->pCustomAuthConnData = MALLOC (cbData + sizeof (DWORD));
if (pPCB->pCustomAuthConnData == NULL)
{
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
TRACE1 (EAPOL, "ElEapWork: Error in allocating memory for pCustomAuthConnData = %ld",
dwRetCode);
return dwRetCode;
}
pPCB->pCustomAuthConnData->dwSizeOfCustomAuthData = cbData;
if ((cbData != 0) && (pbAuthData != NULL))
{
memcpy ((BYTE *)pPCB->pCustomAuthConnData->pbCustomAuthData,
(BYTE *)pbAuthData,
cbData);
}
TRACE0 (EAPOL, "ElEapWork: Saved EAP data for connection");
}
switch( EapResult.Action )
{
case ELEAP_Send:
case ELEAP_SendAndDone:
// Send out EAPOL packet
memcpy ((BYTE *)pEapolPkt->EthernetType,
(BYTE *)pPCB->bEtherType,
SIZE_ETHERNET_TYPE);
pEapolPkt->ProtocolVersion = pPCB->bProtocolVersion;
pEapolPkt->PacketType = EAP_Packet;
// The EAP packet length is in the packet returned back by
// the Dll MakeMessage
// In case of Notification and Identity Response, it is in
// EapResult.wSizeOfEapPkt
if (EapResult.wSizeOfEapPkt == 0)
{
EapResult.wSizeOfEapPkt =
WireToHostFormat16 (pSendPkt->Length);
}
HostToWireFormat16 ((WORD) EapResult.wSizeOfEapPkt,
(BYTE *)pEapolPkt->PacketBodyLength);
// Make a copy of the EAPOL packet in the PCB
// Will be used during retransmission
if (pPCB->pbPreviousEAPOLPkt != NULL)
{
FREE (pPCB->pbPreviousEAPOLPkt);
pPCB->pbPreviousEAPOLPkt = NULL;
}
pPCB->pbPreviousEAPOLPkt =
MALLOC (sizeof (EAPOL_PACKET)+EapResult.wSizeOfEapPkt-1);
if (pPCB->pbPreviousEAPOLPkt == NULL)
{
dwRetCode = ERROR_NOT_ENOUGH_MEMORY;
TRACE0 (EAPOL, "ElEapWork: MALLOC failed for pbPreviousEAPOLPkt");
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
return dwRetCode;
}
memcpy (pPCB->pbPreviousEAPOLPkt, pEapolPkt,
sizeof (EAPOL_PACKET)+EapResult.wSizeOfEapPkt-1);
pPCB->dwSizeOfPreviousEAPOLPkt =
sizeof (EAPOL_PACKET)+EapResult.wSizeOfEapPkt-1;
pPCB->dwPreviousId = dwReceivedId;
// Send packet out on the port
dwRetCode = ElWriteToPort (pPCB,
(CHAR *)pEapolPkt,
sizeof (EAPOL_PACKET)+EapResult.wSizeOfEapPkt-1);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "ElEapWork: Error in writing EAP_Packet to port %ld",
dwRetCode);
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
return dwRetCode;
}
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
// More processing to be done?
// Supplicant side should not ever receive ELEAP_SendAndDone
// result code
if (EapResult.Action != ELEAP_SendAndDone)
{
break;
}
else
{
TRACE0 (EAPOL, "ElEapWork: ELEAP_SendAndDone wrong result received");
}
case ELEAP_Done:
// Retrieve MPPE keys from the attributes information
// returned by EAP-TLS
switch (EapResult.dwError)
{
case NO_ERROR:
TRACE0 (EAPOL, "ElEapWork: Authentication was successful");
pPCB->fLocalEAPAuthSuccess = TRUE;
//
// If authentication was successful
//
dwRetCode = ElExtractMPPESendRecvKeys (
pPCB,
EapResult.pUserAttributes,
(BYTE*)&(EapResult.abChallenge),
(BYTE*)&(EapResult.abResponse));
if (dwRetCode != NO_ERROR)
{
FREE (pEapolPkt);
//NotifyCallerOfFailure (pPcb, dwRetCode);
return dwRetCode;
}
// ISSUE:
// Do we want to retain UserAttributes
// pPCB->pAuthProtocolAttributes = EapResult.pUserAttributes;
break;
default:
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
TRACE0 (EAPOL, "ElEapWork: Authentication FAILED");
pPCB->dwLocalEAPAuthResult = EapResult.dwError;
break;
}
// Free memory allocated for the packet, since no response
// is going to be sent out
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
break;
case ELEAP_NoAction:
// Free memory allocated for the packet, since nothing
// is being done with it
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
break;
default:
break;
}
if (pEapolPkt != NULL)
{
FREE (pEapolPkt);
pEapolPkt = NULL;
}
//
// Check to see if we have to bring up the InteractiveUI for EAP
// i.e. Server cert confirmation etc.
//
if (EapResult.fInvokeEapUI)
{
ElInvokeInteractiveUI (pPCB, &(EapResult.InvokeEapUIData));
}
return dwRetCode;
}
//
//
// ElExtractMPPESendRecvKeys
//
// Description:
// Function called if authentication was successful. The MPPE Send &
// Recv keys are extracted from the RAS_AUTH_ATTRIBUTE passed from
// the EAP DLL and stored in the PCB. The keys are used to decrypt
// the multicast WEP key and also are used for media-based encrypting.
//
// Return values
//
// NO_ERROR - Success
// Non-zero - Failure
//
DWORD
ElExtractMPPESendRecvKeys (
IN EAPOL_PCB *pPCB,
IN RAS_AUTH_ATTRIBUTE * pUserAttributes,
IN BYTE * pChallenge,
IN BYTE * pResponse
)
{
RAS_AUTH_ATTRIBUTE * pAttribute;
RAS_AUTH_ATTRIBUTE * pAttributeSendKey;
RAS_AUTH_ATTRIBUTE * pAttributeRecvKey;
DWORD dwRetCode = NO_ERROR;
DWORD dwEncryptionPolicy = 0;
DWORD dwEncryptionTypes = 0;
do
{
pAttribute = ElAuthAttributeGetVendorSpecific (
311, 12, pUserAttributes);
pAttributeSendKey = ElAuthAttributeGetVendorSpecific ( 311, 16,
pUserAttributes);
pAttributeRecvKey = ElAuthAttributeGetVendorSpecific ( 311, 17,
pUserAttributes);
if ((pAttributeSendKey != NULL)
&& (pAttributeRecvKey != NULL))
{
// Set the MS-MPPE-Send-Key and MS-MPPE-Recv-Key with
// the ethernet driver
ULONG ulSendKeyLength = 0;
ULONG ulRecvKeyLength = 0;
// Based on PPP code
ulSendKeyLength = *(((BYTE*)(pAttributeSendKey->Value))+8);
ulRecvKeyLength = *(((BYTE*)(pAttributeRecvKey->Value))+8);
// TRACE0 (EAPOL, "Send key = ");
// EAPOL_DUMPBA (((BYTE*)(pAttributeSendKey->Value))+9,
// ulSendKeyLength);
// TRACE0 (EAPOL, "Recv key = ");
// EAPOL_DUMPBA (((BYTE*)(pAttributeRecvKey->Value))+9,
// ulRecvKeyLength);
//
// Copy MPPE Send and Receive Keys into the PCB for later usage
// These keys will be used to decrypt keys sent by NAS (if any).
// Save the keys as the MasterSecret for dynamic rekeying (if any).
//
if (ulSendKeyLength != 0)
{
if (pPCB->MasterSecretSend.cbData != 0)
{
FREE (pPCB->MasterSecretSend.pbData);
pPCB->MasterSecretSend.cbData = 0;
pPCB->MasterSecretSend.pbData = NULL;
}
if ((dwRetCode = ElSecureEncodePw (
((BYTE*)(pAttributeSendKey->Value))+9,
ulSendKeyLength,
&(pPCB->MasterSecretSend)
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElExtractMPPESendRecvKeys: ElSecureEncodePw for Master Send failed with error %ld",
dwRetCode);
break;
}
if (pPCB->MPPESendKey.cbData != 0)
{
FREE (pPCB->MPPESendKey.pbData);
pPCB->MPPESendKey.cbData = 0;
pPCB->MPPESendKey.pbData = NULL;
}
if ((dwRetCode = ElSecureEncodePw (
((BYTE*)(pAttributeSendKey->Value))+9,
ulSendKeyLength,
&(pPCB->MPPESendKey)
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElExtractMPPESendRecvKeys: ElSecureEncodePw for MPPESend failed with error %ld",
dwRetCode);
break;
}
}
if (ulRecvKeyLength != 0)
{
if (pPCB->MasterSecretRecv.cbData != 0)
{
FREE (pPCB->MasterSecretRecv.pbData);
pPCB->MasterSecretRecv.cbData = 0;
pPCB->MasterSecretRecv.pbData = NULL;
}
if ((dwRetCode = ElSecureEncodePw (
((BYTE*)(pAttributeRecvKey->Value))+9,
ulRecvKeyLength,
&(pPCB->MasterSecretRecv)
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElExtractMPPESendRecvKeys: ElSecureEncodePw for Master Recv failed with error %ld",
dwRetCode);
break;
}
if (pPCB->MPPERecvKey.cbData != 0)
{
FREE (pPCB->MPPERecvKey.pbData);
pPCB->MPPERecvKey.cbData = 0;
pPCB->MPPERecvKey.pbData = NULL;
}
if ((dwRetCode = ElSecureEncodePw (
((BYTE*)(pAttributeRecvKey->Value))+9,
ulRecvKeyLength,
&(pPCB->MPPERecvKey)
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElExtractMPPESendRecvKeys: ElSecureEncodePw for MPPERecv failed with error %ld",
dwRetCode);
break;
}
}
TRACE0 (EAPOL,"MPPE-Send/Recv-Keys derived by supplicant");
}
else
{
TRACE0 (EAPOL, "ElExtractMPPESendRecvKeys: pAttributeSendKey or pAttributeRecvKey == NULL");
}
} while (FALSE);
if (dwRetCode != NO_ERROR)
{
if (pPCB->MasterSecretSend.cbData != 0)
{
FREE (pPCB->MasterSecretSend.pbData);
pPCB->MasterSecretSend.cbData = 0;
pPCB->MasterSecretSend.pbData = NULL;
}
if (pPCB->MasterSecretRecv.cbData != 0)
{
FREE (pPCB->MasterSecretRecv.pbData);
pPCB->MasterSecretRecv.cbData = 0;
pPCB->MasterSecretRecv.pbData = NULL;
}
if (pPCB->MPPESendKey.cbData != 0)
{
FREE (pPCB->MPPESendKey.pbData);
pPCB->MPPESendKey.cbData = 0;
pPCB->MPPESendKey.pbData = NULL;
}
if (pPCB->MPPERecvKey.cbData != 0)
{
FREE (pPCB->MPPERecvKey.pbData);
pPCB->MPPERecvKey.cbData = 0;
pPCB->MPPERecvKey.pbData = NULL;
}
}
return( dwRetCode );
}
//
// ElProcessEapSuccess
//
// Description:
//
// Function called when an EAP_Success is received in any state
//
// Input arguments:
// pPCB - Pointer to PCB for the port on which data is being processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElProcessEapSuccess (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
EAPOL_ZC_INTF ZCData;
DWORD dwRetCode = NO_ERROR;
TRACE0 (EAPOL, "ElProcessEapSuccess: Got EAPCODE_Success");
do
{
// Indicate to EAP=Dll to cleanup completed session
if ((dwRetCode = ElEapEnd (pPCB)) != NO_ERROR)
{
TRACE1 (EAPOL, "ProcessReceivedPacket: EapSuccess: Error in ElEapEnd = %ld",
dwRetCode);
break;
}
TRACE0 (EAPOL, "ElProcessEapSuccess: Authentication successful");
// Complete remaining processing i.e. DHCP
if ((dwRetCode = FSMAuthenticated (pPCB,
pEapolPkt)) != NO_ERROR)
{
break;
}
#ifdef ZEROCONFIG_LINKED
// Indicate to WZC that authentication succeeded and
// reset the blob it stores for the current SSID
ZeroMemory ((PVOID)&ZCData, sizeof(EAPOL_ZC_INTF));
ZCData.dwAuthFailCount = 0;
ZCData.PreviousAuthenticationType = EAPOL_UNAUTHENTICATED_ACCESS;
if (pPCB->pSSID != NULL)
{
memcpy (ZCData.bSSID, pPCB->pSSID->Ssid, pPCB->pSSID->SsidLength);
ZCData.dwSizeOfSSID = pPCB->pSSID->SsidLength;
}
if ((dwRetCode = ElZeroConfigNotify (
pPCB->dwZeroConfigId,
WZCCMD_CFG_SETDATA,
pPCB->pwszDeviceGUID,
&ZCData
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElProcessEapSuccess: ElZeroConfigNotify failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
TRACE1 (EAPOL, "ElProcessEapSuccess: Called ElZeroConfigNotify with type=(%ld)",
WZCCMD_CFG_SETDATA);
#endif // ZEROCONFIG_LINKED
ElNetmanNotify (pPCB, EAPOL_NCS_AUTHENTICATION_SUCCEEDED, NULL);
}
while (FALSE);
return dwRetCode;
}
//
// ElProcessEapFail
//
// Description:
//
// Function called when an EAP_Fail is received in any state
//
// Input arguments:
// pPCB - Pointer to PCB for the port on which data is being processed
// pEapolPkt - Pointer to EAPOL packet that was received
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElProcessEapFail (
IN EAPOL_PCB *pPCB,
IN EAPOL_PACKET *pEapolPkt
)
{
EAPOL_ZC_INTF ZCData;
DWORD dwRetCode = NO_ERROR;
TRACE0 (EAPOL, "ElProcessEapFail: Got EAPCODE_Failure");
do
{
// Indicate to EAP-Dll to cleanup completed session
if ((dwRetCode = ElEapEnd (pPCB)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElProcessEapFail: EapFail: Error in ElEapEnd = %ld",
dwRetCode);
break;
}
// Show failure balloon before notifying ZeroConfig
// ZeroConfig may require to pop-up its own balloon, and that has
// to be given preference
ElNetmanNotify (pPCB, EAPOL_NCS_AUTHENTICATION_FAILED, NULL);
#ifdef ZEROCONFIG_LINKED
// Indicate to WZC that authentication failed
ZeroMemory ((PVOID)&ZCData, sizeof(EAPOL_ZC_INTF));
ZCData.dwAuthFailCount = pPCB->dwAuthFailCount + 1;
ZCData.PreviousAuthenticationType = pPCB->PreviousAuthenticationType;
if (pPCB->pSSID != NULL)
{
memcpy (ZCData.bSSID, pPCB->pSSID->Ssid, pPCB->pSSID->SsidLength);
ZCData.dwSizeOfSSID = pPCB->pSSID->SsidLength;
}
// We notify ZC before going through held state, where fail count is
// upped. Hence, here we explicitly up it by one
if ((dwRetCode = ElZeroConfigNotify (
pPCB->dwZeroConfigId,
((pPCB->dwAuthFailCount+1) < pPCB->dwTotalMaxAuthFailCount)?WZCCMD_CFG_NEXT:WZCCMD_CFG_DELETE,
pPCB->pwszDeviceGUID,
&ZCData
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElProcessEapFail: ElZeroConfigNotify failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
TRACE3 (EAPOL, "ElProcessEapFail: Called ElZeroConfigNotify with failcount = %ld, prevauthtype = %ld, type=(%ld)",
ZCData.dwAuthFailCount,
ZCData.PreviousAuthenticationType,
((pPCB->dwAuthFailCount+1) < pPCB->dwTotalMaxAuthFailCount)?WZCCMD_CFG_NEXT:WZCCMD_CFG_DELETE
);
#endif // ZEROCONFIG_LINKED
if ((dwRetCode = FSMHeld (pPCB, NULL)) != NO_ERROR)
{
break;
}
}
while (FALSE);
return dwRetCode;
}
//
// ElSetEAPOLKeyReceivedTimer
//
// Description:
//
// Function called for wireless interface when it enter AUTHENTICATED state
// If no EAPOL-Key message is received for the transmit key in the meanwhile
// the association should be negated to Zero-Config
//
// Input arguments:
// pPCB - Pointer to PCB for the port which entered AUTHENTICATED state
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElSetEAPOLKeyReceivedTimer (
IN EAPOL_PCB *pPCB
)
{
DWORD dwRetCode = NO_ERROR;
do
{
if (pPCB->fTransmitKeyReceived)
{
TRACE0 (EAPOL, "EAPOL-Key for transmit key received before entering AUTHENTICATED state");
break;
}
RESTART_TIMER (pPCB->hTimer,
EAPOL_TRANSMIT_KEY_INTERVAL,
"PCB",
&dwRetCode);
if (dwRetCode != NO_ERROR)
{
TRACE1 (EAPOL, "ElSetEAPOLKeyReceivedTimer: Error in RESTART_TIMER %ld",
dwRetCode);
break;
}
SET_TRANSMIT_KEY_TIMER(pPCB);
}
while (FALSE);
return dwRetCode;
}
//
// ElVerifyEAPOLKeyReceived
//
// Description:
//
// Function called on timeout to verify if EAPOL-transmit key was received
// If no EAPOL-Key message is received for the transmit key in the meanwhile
// the association should be negated to Zero-Config
//
// Input arguments:
// pPCB - Pointer to PCB for the port which entered AUTHENTICATED state
//
// Return values:
// NO_ERROR - success
// non-zero - error
//
DWORD
ElVerifyEAPOLKeyReceived (
IN EAPOL_PCB *pPCB
)
{
EAPOL_ZC_INTF ZCData;
DWORD dwRetCode = NO_ERROR;
do
{
if (!pPCB->fTransmitKeyReceived)
{
TRACE1 (EAPOL, "EAPOL-Key for transmit key *NOT* received within %ld seconds in AUTHENTICATED state",
EAPOL_TRANSMIT_KEY_INTERVAL
);
DbLogPCBEvent (DBLOG_CATEG_ERR, pPCB, EAPOL_NOT_RECEIVED_XMIT_KEY);
#ifdef ZEROCONFIG_LINKED
// Indicate to WZC that authentication didn't really complete
// since there was EAPOL-Key packet for the transmit key
// Fail the entire configuration
ZeroMemory ((PVOID)&ZCData, sizeof(EAPOL_ZC_INTF));
ZCData.dwAuthFailCount = pPCB->dwTotalMaxAuthFailCount;
pPCB->dwAuthFailCount = pPCB->dwTotalMaxAuthFailCount;
ZCData.PreviousAuthenticationType = pPCB->PreviousAuthenticationType;
if (pPCB->pSSID != NULL)
{
memcpy (ZCData.bSSID, pPCB->pSSID->Ssid, pPCB->pSSID->SsidLength);
ZCData.dwSizeOfSSID = pPCB->pSSID->SsidLength;
}
if ((dwRetCode = ElZeroConfigNotify (
pPCB->dwZeroConfigId,
((pPCB->dwAuthFailCount) < pPCB->dwTotalMaxAuthFailCount)?WZCCMD_CFG_NEXT:WZCCMD_CFG_DELETE,
pPCB->pwszDeviceGUID,
&ZCData
)) != NO_ERROR)
{
TRACE1 (EAPOL, "ElVerifyEAPOLKeyReceived: ElZeroConfigNotify failed with error %ld",
dwRetCode);
dwRetCode = NO_ERROR;
}
TRACE3 (EAPOL, "ElVerifyEAPOLKeyReceived: Called ElZeroConfigNotify with failcount = %ld, prevauthtype = %ld, type=(%ld)",
ZCData.dwAuthFailCount,
ZCData.PreviousAuthenticationType,
((pPCB->dwAuthFailCount+1) < pPCB->dwTotalMaxAuthFailCount)?WZCCMD_CFG_NEXT:WZCCMD_CFG_DELETE
);
// If authfailed limit reached, go to Disconnected state
if (pPCB->dwAuthFailCount >= pPCB->dwTotalMaxAuthFailCount)
{
TRACE2 (EAPOL, "ElVerifyEAPOLKeyReceived: Pushing into disconnected state: Fail count (%ld) > Max fail count (%ld)",
pPCB->dwAuthFailCount, pPCB->dwTotalMaxAuthFailCount);
FSMDisconnected (pPCB, NULL);
}
#endif // ZEROCONFIG_LINKED
}
else
{
TRACE1 (EAPOL, "EAPOL-Key for transmit key received within %ld seconds in AUTHENTICATED state",
EAPOL_TRANSMIT_KEY_INTERVAL
);
}
}
while (FALSE);
return dwRetCode;
}
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