466 lines
14 KiB
C
466 lines
14 KiB
C
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#include <precomp.h>
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#include "tracing.h"
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#include "utils.h"
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//------------------------------------
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// Allocates storage for RPC transactions. The RPC stubs will either call
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// MIDL_user_allocate when it needs to un-marshall data into a buffer
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// that the user must free. RPC servers will use MIDL_user_allocate to
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// allocate storage that the RPC server stub will free after marshalling
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// the data.
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PVOID
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MIDL_user_allocate(IN size_t NumBytes)
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{
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PVOID pMem;
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pMem = (NumBytes > 0) ? LocalAlloc(LMEM_ZEROINIT,NumBytes) : NULL;
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DbgPrint((TRC_MEM, "[MIDL_user_allocate(%d)=0x%p]", NumBytes, pMem));
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return pMem;
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}
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//------------------------------------
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// Frees storage used in RPC transactions. The RPC client can call this
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// function to free buffer space that was allocated by the RPC client
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// stub when un-marshalling data that is to be returned to the client.
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// The Client calls MIDL_user_free when it is finished with the data and
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// desires to free up the storage.
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// The RPC server stub calls MIDL_user_free when it has completed
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// marshalling server data that is to be passed back to the client.
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VOID
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MIDL_user_free(IN LPVOID MemPointer)
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{
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DbgPrint((TRC_MEM, "[MIDL_user_free(0x%p)]", MemPointer));
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if (MemPointer != NULL)
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LocalFree(MemPointer);
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}
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//------------------------------------
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// Allocates general usage memory from the process heap
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PVOID
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Process_user_allocate(IN size_t NumBytes)
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{
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PVOID pMem;
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pMem = (NumBytes > 0) ? HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, NumBytes) : NULL;
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DbgPrint((TRC_MEM, "[MemAlloc(%d)=0x%p]", NumBytes, pMem));
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return pMem;
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}
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//------------------------------------
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// Frees general usage memory
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VOID
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Process_user_free(IN LPVOID pMem)
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{
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DbgPrint((TRC_MEM, "[MemFree(0x%p)]", pMem));
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if (pMem != NULL)
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HeapFree(GetProcessHeap(), 0, (pMem));
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}
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//-----------------------------------------------------------
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// Searches pwzcConfig in the list pwzcVList. The entries are
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// matched exclusively based on the matching SSIDs and on
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// matching Infrastructure Mode.
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// [in] pwzcVList: Set of WZC_WLAN_CONFIGs to search in
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// [in] pwzcConfig: WZC_WLAN_CONFIG to look for
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// [in] nIdx: index in pwzcVList to start searching from
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// Returns: Pointer to the entry that matches pwzcConfig or NULL
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// if none matches
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PWZC_WLAN_CONFIG
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WzcFindConfig(
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PWZC_802_11_CONFIG_LIST pwzcList,
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PWZC_WLAN_CONFIG pwzcConfig,
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ULONG nIdx)
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{
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PWZC_WLAN_CONFIG pMatchingConfig = NULL;
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// if there is no config in pwzcList, there is no reason in
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// looking further
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if (pwzcList != NULL)
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{
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ULONG i;
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// for each of the visible SSIDs, see if it matches the given one
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for (i = nIdx; i < pwzcList->NumberOfItems; i++)
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{
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PWZC_WLAN_CONFIG pCrt;
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pCrt = &(pwzcList->Config[i]);
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// the SSIDs match if they have the same InfrastructureMode, their
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// SSID strings have the same length and are the same
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if (pCrt->InfrastructureMode == pwzcConfig->InfrastructureMode &&
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pCrt->Ssid.SsidLength == pwzcConfig->Ssid.SsidLength &&
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RtlCompareMemory(pCrt->Ssid.Ssid, pwzcConfig->Ssid.Ssid, pCrt->Ssid.SsidLength) == pCrt->Ssid.SsidLength)
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{
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pMatchingConfig = pCrt;
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break;
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}
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}
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}
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return pMatchingConfig;
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}
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//---------------------------------------------------------------------
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// Matches the content of the two configurations one against the other.
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// [in] pwzcConfigA: | configs to match
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// [in] pwzcConfigB: |
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// [in/out] pbWepDiffOnly: TRUE if there is a difference and the difference is exclusively
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// in the WEP Key index or in WEP Key Material. Otherwise is false.
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// Returns: TRUE if the configs match, FALSE otherwise;
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BOOL
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WzcMatchConfig(
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PWZC_WLAN_CONFIG pwzcConfigA,
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PWZC_WLAN_CONFIG pwzcConfigB,
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PBOOL pbWepDiffOnly)
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{
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BOOL bDiff;
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BOOL bWepDiff;
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bDiff = (pwzcConfigA->dwCtlFlags & WZCCTL_WEPK_PRESENT) != (pwzcConfigB->dwCtlFlags & WZCCTL_WEPK_PRESENT);
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bDiff = bDiff || (pwzcConfigA->Privacy != pwzcConfigB->Privacy);
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bDiff = bDiff || (pwzcConfigA->InfrastructureMode != pwzcConfigB->InfrastructureMode);
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bDiff = bDiff || (pwzcConfigA->AuthenticationMode != pwzcConfigB->AuthenticationMode);
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bDiff = bDiff || (memcmp(&pwzcConfigA->Ssid, &pwzcConfigB->Ssid, sizeof(NDIS_802_11_SSID)) != 0);
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bWepDiff = (pwzcConfigA->KeyIndex != pwzcConfigB->KeyIndex);
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bWepDiff = bWepDiff || (pwzcConfigA->KeyLength != pwzcConfigB->KeyLength);
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bWepDiff = bWepDiff || (memcmp(&pwzcConfigA->KeyMaterial, &pwzcConfigB->KeyMaterial, WZCCTL_MAX_WEPK_MATERIAL) != 0);
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if (pbWepDiffOnly != NULL)
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*pbWepDiffOnly = (!bDiff && bWepDiff);
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return !bDiff && !bWepDiff;
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}
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//-----------------------------------------------------------
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// Converts an NDIS_802_11_BSSID_LIST object to an equivalent
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// (imaged) WZC_802_11_CONFIG_LIST
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// [in] pndList: NDIS BSSID list to convert
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// Returns: Pointer to the list of copied WZC configurations
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PWZC_802_11_CONFIG_LIST
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WzcNdisToWzc(
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PNDIS_802_11_BSSID_LIST pndList)
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{
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PWZC_802_11_CONFIG_LIST pwzcList = NULL;
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// if there is no NDIS list, don't do anything
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if (pndList != NULL)
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{
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// allocate space for the WZC image
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pwzcList = (PWZC_802_11_CONFIG_LIST)
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MemCAlloc(FIELD_OFFSET(WZC_802_11_CONFIG_LIST, Config) +
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pndList->NumberOfItems * sizeof(WZC_WLAN_CONFIG));
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// in case allocation failed, return NULL, the caller will know it
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// is an error since he passed down a !NULL pointer.
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if (pwzcList != NULL)
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{
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UINT i;
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LPBYTE prawList = (LPBYTE)&(pndList->Bssid[0]);
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pwzcList->NumberOfItems = pndList->NumberOfItems;
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// for each of the NDIS configs, copy the relevant data into the WZC config
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for (i = 0; i < pwzcList->NumberOfItems; i++)
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{
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PWZC_WLAN_CONFIG pwzcConfig;
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PNDIS_WLAN_BSSID pndBssid;
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pwzcConfig = &(pwzcList->Config[i]);
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pndBssid = (PNDIS_WLAN_BSSID)prawList;
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prawList += pndBssid->Length;
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pwzcConfig->Length = sizeof(WZC_WLAN_CONFIG);
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memcpy(&(pwzcConfig->MacAddress), &(pndBssid->MacAddress), sizeof(NDIS_802_11_MAC_ADDRESS));
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memcpy(&(pwzcConfig->Ssid), &(pndBssid->Ssid), sizeof(NDIS_802_11_SSID));
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pwzcConfig->Privacy = pndBssid->Privacy;
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pwzcConfig->Rssi = pndBssid->Rssi;
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pwzcConfig->NetworkTypeInUse = pndBssid->NetworkTypeInUse;
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memcpy(&(pwzcConfig->Configuration), &(pndBssid->Configuration), sizeof(NDIS_802_11_CONFIGURATION));
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pwzcConfig->InfrastructureMode = pndBssid->InfrastructureMode;
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memcpy(&(pwzcConfig->SupportedRates), &(pndBssid->SupportedRates), sizeof(NDIS_802_11_RATES));
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}
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}
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}
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return pwzcList;
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}
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//-----------------------------------------------------------
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// WzcCleanupWzcList: Cleanup a list of WZC_WLAN_CONFIG objects
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VOID
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WzcCleanupWzcList(
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PWZC_802_11_CONFIG_LIST pwzcList)
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{
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if (pwzcList != NULL)
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{
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UINT i;
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for (i=0; i<pwzcList->NumberOfItems; i++)
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MemFree(pwzcList->Config[i].rdUserData.pData);
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MemFree(pwzcList);
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}
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}
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//-----------------------------------------------------------
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// RccsInit: Initializes an RCCS structure
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DWORD
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RccsInit(PRCCS_SYNC pRccs)
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{
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DWORD dwErr = ERROR_SUCCESS;
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// assume pRccs is not null (it shouldn't be under any
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// circumstances)
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__try
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{
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InitializeCriticalSection(&(pRccs->csMutex));
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}
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__except(EXCEPTION_EXECUTE_HANDLER)
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{
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dwErr = GetExceptionCode();
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}
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// access through this structure will be paired as Enter/Leave calls
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// Object deletion will bump down the ref counter which will reach 0
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// and will trigger the destruction code.
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pRccs->nRefCount = 1;
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return dwErr;
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}
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//-----------------------------------------------------------
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// RccsInit: Deletes an RCCS structure
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DWORD
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RccsDestroy(PRCCS_SYNC pRccs)
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{
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// assume pRccs is not null (it shouldn't be under any
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// circumstances)
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DeleteCriticalSection(&(pRccs->csMutex));
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return ERROR_SUCCESS;
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}
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//-----------------------------------------------------------
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// WzcCryptBuffer: Randomly generates a nBufLen bytes in the range
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// [loByte hiByte], all stored in pBuffer (buffer assumed preallocated)
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// Returns a win32 error code.
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DWORD
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WzcRndGenBuffer(LPBYTE pBuffer, UINT nBufLen, BYTE loByte, BYTE hiByte)
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{
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DWORD dwErr = ERROR_SUCCESS;
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HCRYPTPROV hProv = (HCRYPTPROV)NULL;
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if (loByte >= hiByte)
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dwErr = ERROR_INVALID_PARAMETER;
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if (dwErr == ERROR_SUCCESS)
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{
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// acquire the crypt context
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if (!CryptAcquireContext(
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&hProv,
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NULL,
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NULL,
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PROV_RSA_FULL,
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CRYPT_VERIFYCONTEXT))
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dwErr = GetLastError();
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DbgAssert((dwErr == ERROR_SUCCESS, "CryptAcquireContext failed with err=%d", dwErr));
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}
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// randomly generate the buffer of bytes
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if (dwErr == ERROR_SUCCESS)
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{
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if (!CryptGenRandom(
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hProv,
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nBufLen,
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pBuffer))
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dwErr = GetLastError();
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DbgAssert((dwErr == ERROR_SUCCESS, "CryptGenRandom failed with err=%d", dwErr));
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}
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// fix each byte from the buffer within the given range
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if (dwErr == ERROR_SUCCESS)
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{
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while (nBufLen > 0)
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{
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*pBuffer = loByte + *pBuffer % (hiByte - loByte + 1);
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pBuffer++;
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nBufLen--;
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}
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}
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// release the crypt context
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if (hProv != (HCRYPTPROV)NULL)
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CryptReleaseContext(hProv,0);
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return dwErr;
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}
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//-----------------------------------------------------------
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// WzcIsNullBuffer: Checks whether a buffer of nBufLen characters
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// is all filled with null characters.
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BOOL
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WzcIsNullBuffer(LPBYTE pBuffer, UINT nBufLen)
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{
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for (;nBufLen > 0 && *pBuffer == 0; pBuffer++, nBufLen--);
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return (nBufLen == 0);
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}
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//-----------------------------------------------------------
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// WzcSSKClean: Cleans up the PSEC_SESSION_KEYS object given as parameter
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VOID
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WzcSSKClean(PSEC_SESSION_KEYS pSSK)
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{
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if (pSSK->dblobSendKey.pbData != NULL)
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{
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LocalFree(pSSK->dblobSendKey.pbData);
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pSSK->dblobSendKey.cbData = 0;
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pSSK->dblobSendKey.pbData = NULL;
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}
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if (pSSK->dblobReceiveKey.pbData != NULL)
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{
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LocalFree(pSSK->dblobReceiveKey.pbData);
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pSSK->dblobReceiveKey.cbData = 0;
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pSSK->dblobReceiveKey.pbData = NULL;
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}
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}
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//-----------------------------------------------------------
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// WzcSSKFree: Frees up the memory used by the PSEC_SESSION_KEYS parameter
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VOID
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WzcSSKFree(PSEC_SESSION_KEYS pSSK)
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{
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if (pSSK != NULL)
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{
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WzcSSKClean(pSSK);
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MemFree(pSSK);
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}
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}
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//-----------------------------------------------------------
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// WzcSSKEncrypt: Creates/Allocates a SEC_SESSION_KEYS object
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// by encrypting the SESSION_KEYS object provided as parameter.
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DWORD
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WzcSSKEncrypt(PSEC_SESSION_KEYS pSSK, PSESSION_KEYS pSK)
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{
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DWORD dwErr = ERROR_SUCCESS;
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DATA_BLOB blobIn;
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DATA_BLOB blobSndOut = {0, NULL};
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DATA_BLOB blobRcvOut = {0, NULL};
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if (pSSK == NULL || pSK == NULL)
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{
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dwErr = ERROR_INVALID_PARAMETER;
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goto exit;
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}
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blobIn.cbData = pSK->dwKeyLength;
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blobIn.pbData = pSK->bSendKey;
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if (!CryptProtectData(
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&blobIn, // DATA_BLOB *pDataIn,
|
||
|
|
L"", // LPCWSTR szDataDescr,
|
||
|
|
NULL, // DATA_BLOB *pOptionalEntropy,
|
||
|
|
NULL, // PVOID pvReserved,
|
||
|
|
NULL, // CRYPTPROTECT_PROMPTSTRUCT *pPromptStrct,
|
||
|
|
0, // DWORD dwFlags,
|
||
|
|
&blobSndOut)) // DATA_BLOB *pDataOut
|
||
|
|
{
|
||
|
|
dwErr = GetLastError();
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
blobIn.cbData = pSK->dwKeyLength;
|
||
|
|
blobIn.pbData = pSK->bReceiveKey;
|
||
|
|
if (!CryptProtectData(
|
||
|
|
&blobIn, // DATA_BLOB *pDataIn,
|
||
|
|
L"", // LPCWSTR szDataDescr,
|
||
|
|
NULL, // DATA_BLOB *pOptionalEntropy,
|
||
|
|
NULL, // PVOID pvReserved,
|
||
|
|
NULL, // CRYPTPROTECT_PROMPTSTRUCT *pPromptStrct,
|
||
|
|
0, // DWORD dwFlags,
|
||
|
|
&blobRcvOut)) // DATA_BLOB *pDataOut
|
||
|
|
{
|
||
|
|
dwErr = GetLastError();
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
pSSK->dblobSendKey = blobSndOut;
|
||
|
|
pSSK->dblobReceiveKey = blobRcvOut;
|
||
|
|
|
||
|
|
exit:
|
||
|
|
if (dwErr != ERROR_SUCCESS)
|
||
|
|
{
|
||
|
|
if (blobSndOut.pbData != NULL)
|
||
|
|
LocalFree(blobSndOut.pbData);
|
||
|
|
if (blobRcvOut.pbData != NULL)
|
||
|
|
LocalFree(blobRcvOut.pbData);
|
||
|
|
}
|
||
|
|
return dwErr;
|
||
|
|
}
|
||
|
|
|
||
|
|
//-----------------------------------------------------------
|
||
|
|
// WzcSSKDecrypt: Creates/Allocates a SESSION_KEYS object
|
||
|
|
// by dencrypting the SEC_SESSION_KEYS object provided as parameter.
|
||
|
|
DWORD
|
||
|
|
WzcSSKDecrypt(PSEC_SESSION_KEYS pSSK, PSESSION_KEYS pSK)
|
||
|
|
{
|
||
|
|
DWORD dwErr = ERROR_SUCCESS;
|
||
|
|
DATA_BLOB blobSndOut = {0, NULL};
|
||
|
|
DATA_BLOB blobRcvOut = {0, NULL};
|
||
|
|
|
||
|
|
if (pSSK == NULL || pSK == NULL)
|
||
|
|
{
|
||
|
|
dwErr = ERROR_INVALID_PARAMETER;
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!CryptUnprotectData(
|
||
|
|
&(pSSK->dblobSendKey),
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
0,
|
||
|
|
&blobSndOut))
|
||
|
|
{
|
||
|
|
dwErr = GetLastError();
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (blobSndOut.cbData > MAX_SESSION_KEY_LENGTH)
|
||
|
|
{
|
||
|
|
dwErr = ERROR_INVALID_DATA;
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!CryptUnprotectData(
|
||
|
|
&(pSSK->dblobReceiveKey),
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
NULL,
|
||
|
|
0,
|
||
|
|
&blobRcvOut))
|
||
|
|
{
|
||
|
|
dwErr = GetLastError();
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (blobRcvOut.cbData != blobSndOut.cbData)
|
||
|
|
{
|
||
|
|
dwErr = ERROR_INVALID_DATA;
|
||
|
|
goto exit;
|
||
|
|
}
|
||
|
|
|
||
|
|
pSK->dwKeyLength = blobSndOut.cbData;
|
||
|
|
memcpy(pSK->bSendKey, blobSndOut.pbData, blobSndOut.cbData);
|
||
|
|
memcpy(pSK->bReceiveKey, blobRcvOut.pbData, blobRcvOut.cbData);
|
||
|
|
|
||
|
|
exit:
|
||
|
|
if (blobSndOut.pbData != NULL)
|
||
|
|
LocalFree(blobSndOut.pbData);
|
||
|
|
if (blobRcvOut.pbData != NULL)
|
||
|
|
LocalFree(blobRcvOut.pbData);
|
||
|
|
return dwErr;
|
||
|
|
}
|