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X70FsdData.c
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X70FsdData.c
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#include "X70FsdData.h"
#include "X70FsdWrite.h"
#include "X70FsdRead.h"
#include "X70FsdCreate.h"
#include "X70FsdCloseCleanup.h"
#include "X70FsdSupport.h"
#include "X70FsdFileInfo.h"
#include "X70FsdInterface.h"
//定义文件版本
UCHAR Version[VERSION_INFO] = "1,0,0,1";
UCHAR FileBegin[FILEBEGIN] = "X70FSD";
UCHAR Flag[OVERFLAG] = "Xiao70";
int hash_idx = -1;
symmetric_key *headskey = NULL;
FAST_MUTEX EncryptMutex;
LARGE_INTEGER X70FsdLarge0 = {0x00000000,0x00000000};
LARGE_INTEGER X70FsdLarge1 = {0x00000001,0x00000000};
LARGE_INTEGER Li0 = { 0, 0 };
LARGE_INTEGER Li1 = { 1, 0 };
CACHE_MANAGER_CALLBACKS G_CacheMgrCallbacks = {
/* AcquireForLazyWrite */
X70FsdCMCAcquireForLazyWrite,
/* ReleaseFromLazyWrite */
X70FsdCMCReleaseFromLazyWrite,
/* AcquireForReadAhead */
X70FsdCMCAcquireForReadAhead,
/* ReleaseFromReadAhead */
X70FsdCMCReleaseFromReadAhead
};
NPAGED_LOOKASIDE_LIST G_IrpContextLookasideList;
NPAGED_LOOKASIDE_LIST G_IoContextLookasideList;
NPAGED_LOOKASIDE_LIST G_FcbLookasideList;
NPAGED_LOOKASIDE_LIST G_EResourceLookasideList;
NPAGED_LOOKASIDE_LIST G_CcbLookasideList;
PAGED_LOOKASIDE_LIST G_FcbHashTableLookasideList;
KSPIN_LOCK GeneralSpinLock;
//哈希表
HASH_ENTRY FcbTable[NUMHASH] = {0};
ERESOURCE FcbTableResource;
USHORT gOsServicePackMajor = 0;
ULONG gOsMajorVersion = 0;
ULONG gOsMinorVersion = 0;
DYNAMIC_FUNCTION_POINTERS gDynamicFunctions = {0};
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
VOID UnloadDriver()
{
ExDeleteNPagedLookasideList(&G_IoContextLookasideList);
ExDeleteNPagedLookasideList(&G_IrpContextLookasideList);
ExDeleteNPagedLookasideList(&G_FcbLookasideList);
ExDeleteNPagedLookasideList(&G_CcbLookasideList);
ExDeleteNPagedLookasideList(&G_EResourceLookasideList);
ExDeletePagedLookasideList(&G_FcbHashTableLookasideList);
ExDeleteResourceLite( &FcbTableResource );
unregister_hash(&md5_desc);
if(headskey != NULL) {ExFreePool(headskey);}
if(Servkey.Buffer != NULL) {ExFreePool(Servkey.Buffer);}
}
NTSTATUS InitDriverEntry(__in PDRIVER_OBJECT DriverObject,
__in PUNICODE_STRING RegistryPath)
{
ULONG i;
NTSTATUS Status;
try{
GetCurrentVersion(); //获得系统版本
if(IS_WINDOWS2000())
{
try_return( Status = STATUS_UNSUCCESSFUL );
}
if (register_hash(&md5_desc) == -1)
{
DbgPrint("Error registering MD5.\n");
try_return( Status = STATUS_UNSUCCESSFUL );
}
hash_idx = find_hash_id(3);
if (hash_idx == -1)
{
DbgPrint("Error find_hash_id MD5.\n");
try_return( Status = STATUS_UNSUCCESSFUL );
}
headskey = FsRtlAllocatePoolWithTag(NonPagedPool,sizeof(symmetric_key),'skey');
RtlZeroMemory(headskey,sizeof(symmetric_key));
if(aes_setup(TestKey,sizeof(TestKey),0,headskey) != CRYPT_OK)
{
ExFreePool(headskey);
return STATUS_UNSUCCESSFUL;
}
ExInitializeNPagedLookasideList( &G_IoContextLookasideList, NULL, NULL, 0, sizeof(LAYERFSD_IO_CONTEXT), 'IoC', 0 );
ExInitializeNPagedLookasideList( &G_IrpContextLookasideList, NULL, NULL, 0, sizeof(IRP_CONTEXT), 'TrC', 0 );
ExInitializeNPagedLookasideList( &G_FcbLookasideList, NULL, NULL, 0, sizeof(FCB), 'FCB', 0 );
ExInitializeNPagedLookasideList( &G_CcbLookasideList, NULL, NULL, 0, sizeof(CCB), 'CCB', 0 );
ExInitializeNPagedLookasideList( &G_EResourceLookasideList,NULL,NULL,0,sizeof(ERESOURCE),'Res',0);
ExInitializePagedLookasideList( &G_FcbHashTableLookasideList,NULL,NULL,0,sizeof(HASH_ENTRY),'FHT',0);
//初始化锁
KeInitializeSpinLock( &GeneralSpinLock );
ExInitializeFastMutex(&EncryptMutex);
ExInitializeResourceLite( &FcbTableResource );
//初始化FcbTable
for(i = 0 ; i< NUMHASH ; i++)
{
InitializeListHead(&FcbTable[i].ListEntry); //初始化为h0
}
GetFltRoutineAddress();
try_exit:NOTHING;
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
//出现异常直接返回
Status = GetExceptionCode();
}
return Status;
}
PERESOURCE
X70FsdAllocateResource (
)
{
PERESOURCE Resource = NULL;
Resource = (PERESOURCE) ExAllocateFromNPagedLookasideList( &G_EResourceLookasideList );
ExInitializeResourceLite( Resource );
return Resource;
}
//VACB???
BOOLEAN InSameVACB(IN ULONGLONG LowAddress, IN ULONGLONG HighAddress)
{
return ((LowAddress >> VACB_OFFSET_SHIFT) ==
(HighAddress >> VACB_OFFSET_SHIFT));
}
VOID GetFltRoutineAddress()
{
UNICODE_STRING RoutineString = {0};
gDynamicFunctions.CheckOplockEx = FltGetRoutineAddress("FltCheckOplockEx");
gDynamicFunctions.OplockBreakH = FltGetRoutineAddress("FltOplockBreakH");
RtlInitUnicodeString(&RoutineString,L"MmDoesFileHaveUserWritableReferences");
gDynamicFunctions.pMmDoesFileHaveUserWritableReferences = MmGetSystemRoutineAddress(&RoutineString);
RtlInitUnicodeString(&RoutineString,L"FsRtlChangeBackingFileObject");
gDynamicFunctions.pFsRtlChangeBackingFileObject = MmGetSystemRoutineAddress(&RoutineString);
}
BOOLEAN
X70FsdIsIrpTopLevel (
IN PFLT_CALLBACK_DATA Data
)
{
if ( IoGetTopLevelIrp() == NULL ) {
IoSetTopLevelIrp((PIRP)Data );
return TRUE;
} else {
return FALSE;
}
}
NTSTATUS X70FsdSyncMoreProcessingCompRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
PKEVENT event = (PKEVENT)Context;
UNREFERENCED_PARAMETER( DeviceObject );
UNREFERENCED_PARAMETER( Irp );
if(event)
{
KeSetEvent(event, 0, FALSE);
}
return STATUS_MORE_PROCESSING_REQUIRED;
}
NTSTATUS
IoCompletionRoutine(
IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN PVOID Context
)
{
UNREFERENCED_PARAMETER(DeviceObject);
UNREFERENCED_PARAMETER(Context);
*Irp->UserIosb = Irp->IoStatus;
if (Irp->UserEvent)
KeSetEvent(Irp->UserEvent, IO_NO_INCREMENT, 0);
if (Irp->MdlAddress)
{
IoFreeMdl(Irp->MdlAddress);
Irp->MdlAddress = NULL;
}
IoFreeIrp(Irp);
return STATUS_MORE_PROCESSING_REQUIRED;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
PFCB X70FsdCreateFcb ()
{
PFCB Fcb = NULL;
Fcb = (PFCB)ExAllocateFromNPagedLookasideList(&G_FcbLookasideList ); //分配一个FCB
if(Fcb != NULL)
{
RtlZeroMemory( Fcb, sizeof(FCB) );
}
return Fcb;
}
PCCB X70FsdCreateCcb()
{
PCCB Ccb = NULL;
Ccb = (PCCB)ExAllocateFromNPagedLookasideList(&G_CcbLookasideList ); //分配一个FCB
if(Ccb != NULL)
{
RtlZeroMemory( Ccb, sizeof(CCB) );
Ccb->FileAccess = FILE_PASS_ACCESS;
}
return Ccb;
}
//把FCB放入链表中这里用一个FcbTable 保存链表信息
BOOLEAN InsertFcbList(PUCHAR HashValue,PFCB *Fcb)
{
ULONG j = 0;
PHASH_ENTRY pHashEntry = NULL;
BOOLEAN AcquireResource = FALSE;
try
{
j = (*HashValue) % NUMHASH;
//申请内存
pHashEntry = (PHASH_ENTRY)ExAllocateFromPagedLookasideList(&G_FcbHashTableLookasideList ); //分配一个FCB
if(pHashEntry == NULL)
{
return FALSE;
}
RtlZeroMemory(pHashEntry,sizeof(HASH_ENTRY));
//插入链表
pHashEntry->Fcb = *Fcb;
RtlCopyMemory(pHashEntry->HashValue,HashValue,MD5_LENGTH);
pHashEntry->Type = HASHTABLE_TYPE_FCB;
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite( &FcbTableResource, TRUE );
AcquireResource = TRUE;
InsertTailList(&FcbTable[j].ListEntry,&pHashEntry->ListEntry);
}
finally
{
if(AcquireResource)
{
ExReleaseResourceLite( &FcbTableResource );
KeLeaveCriticalRegion();
}
}
return TRUE;;
}
BOOLEAN RemoveFcbList(PUCHAR HashValue,PFCB *Fcb)
{
ULONG j = 0;
KIRQL OldIrql;
PLIST_ENTRY pListEntry;
BOOLEAN AcquireResource = FALSE;
BOOLEAN ret = FALSE;
try
{
j = (*HashValue) % NUMHASH;
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite( &FcbTableResource, TRUE );
AcquireResource = TRUE;
if(IsListEmpty(&FcbTable[j].ListEntry)) //空的表
{
ret = TRUE;
}
else //不是空表对这个表进行查找
{
for(pListEntry = FcbTable[j].ListEntry.Flink; pListEntry != &FcbTable[j].ListEntry ; pListEntry = pListEntry->Flink) //查找数据 查找到了进行添加否则建立一个新的数据到链表中
{
PHASH_ENTRY hashEntry = CONTAINING_RECORD(pListEntry, HASH_ENTRY, ListEntry);
if(RtlCompareMemory(hashEntry->HashValue,HashValue,MD5_LENGTH) == MD5_LENGTH)
{
//删除这个项
RemoveEntryList(&hashEntry->ListEntry);
ExFreeToPagedLookasideList(&G_FcbHashTableLookasideList,hashEntry);
ret = TRUE;
break;
}
}
}
}
finally
{
if(AcquireResource)
{
ExReleaseResourceLite( &FcbTableResource );
KeLeaveCriticalRegion();
}
}
return ret;
}
//对Hash表进行查找
BOOLEAN FindExistFcb(PUCHAR HashValue,PFCB * pFcb)
{
ULONG j = 0;
KIRQL OldIrql;
PLIST_ENTRY pListEntry;
BOOLEAN AcquireResource = FALSE;
BOOLEAN ret = FALSE;
try
{
j = (*HashValue) % NUMHASH;
KeEnterCriticalRegion();
ExAcquireResourceSharedLite( &FcbTableResource, TRUE );
AcquireResource = TRUE;
if(IsListEmpty(&FcbTable[j].ListEntry)) //空的表
{
ret = FALSE;
}
else //不是空表对这个表进行查找
{
for(pListEntry = FcbTable[j].ListEntry.Flink; pListEntry != &FcbTable[j].ListEntry ; pListEntry = pListEntry->Flink) //查找数据 查找到了进行添加否则建立一个新的数据到链表中
{
PHASH_ENTRY hashEntry = CONTAINING_RECORD(pListEntry, HASH_ENTRY, ListEntry);
if(RtlCompareMemory(hashEntry->HashValue,HashValue,MD5_LENGTH) == MD5_LENGTH)
{
*pFcb = hashEntry->Fcb;
ret = TRUE;
break;
}
}
}
}
finally
{
if(AcquireResource)
{
ExReleaseResourceLite( &FcbTableResource );
KeLeaveCriticalRegion();
}
}
return ret;
}
BOOLEAN UpdateHashValue(PUCHAR OldHashValue,PUCHAR NewHashValue,PFCB * pFcb)
{
ULONG j = 0,i = 0;
PLIST_ENTRY pListEntry;
PHASH_ENTRY pNewHashEntry = NULL;
BOOLEAN AcquireResource = FALSE;
BOOLEAN ret = FALSE;
try
{
j = (*OldHashValue) % NUMHASH;
i = (*NewHashValue) % NUMHASH;
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite( &FcbTableResource, TRUE );
AcquireResource = TRUE;
if(IsListEmpty(&FcbTable[j].ListEntry)) //空的表
{
ret = FALSE;
}
else //不是空表对这个表进行查找
{
for(pListEntry = FcbTable[j].ListEntry.Flink; pListEntry != &FcbTable[j].ListEntry ; pListEntry = pListEntry->Flink) //查找数据 查找到了进行添加否则建立一个新的数据到链表中
{
PHASH_ENTRY hashEntry = CONTAINING_RECORD(pListEntry, HASH_ENTRY, ListEntry);
//更新hash
if(RtlCompareMemory(hashEntry->HashValue,OldHashValue,MD5_LENGTH) == MD5_LENGTH)
{
//删除这个项
RemoveEntryList(&hashEntry->ListEntry);
ExFreeToPagedLookasideList(&G_FcbHashTableLookasideList,hashEntry);
//增加新的
//申请内存
pNewHashEntry = (PHASH_ENTRY)ExAllocateFromPagedLookasideList(&G_FcbHashTableLookasideList ); //分配一个FCB
RtlZeroMemory(pNewHashEntry,sizeof(HASH_ENTRY));
RtlCopyMemory((*pFcb)->HashValue,NewHashValue,MD5_LENGTH);
//插入链表
pNewHashEntry->Fcb = *pFcb;
RtlCopyMemory(pNewHashEntry->HashValue,NewHashValue,MD5_LENGTH);
pNewHashEntry->Type = HASHTABLE_TYPE_FCB;
InsertTailList(&FcbTable[i].ListEntry,&pNewHashEntry->ListEntry);
ret = TRUE;
break;
}
}
}
}
finally
{
if(AcquireResource)
{
ExReleaseResourceLite( &FcbTableResource );
KeLeaveCriticalRegion();
}
}
return ret;
}
NTSTATUS X70FsdCloseGetFileBasicInfo(PFILE_OBJECT FileObject,PIRP_CONTEXT IrpContext,PFILE_BASIC_INFORMATION fbi)
{
NTSTATUS Status = STATUS_SUCCESS;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
try
{
Status = FltAllocateCallbackData(IrpContext->FltObjects.Instance,FileObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RetNewCallbackData->Iopb->MajorFunction = IRP_MJ_QUERY_INFORMATION;
RetNewCallbackData->Iopb->MinorFunction = 0;
RetNewCallbackData->Iopb->Parameters.QueryFileInformation.FileInformationClass = FileBasicInformation;
RetNewCallbackData->Iopb->Parameters.QueryFileInformation.Length = sizeof(FILE_BASIC_INFORMATION);
RetNewCallbackData->Iopb->Parameters.QueryFileInformation.InfoBuffer = fbi;
RetNewCallbackData->Iopb->TargetFileObject = FileObject;
FltPerformSynchronousIo(RetNewCallbackData);
Status = RetNewCallbackData->IoStatus.Status;
}
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
Status = GetExceptionCode();
DbgPrint("X70FsdCloseGetFileBasicInfo Exception %x \n",Status);
}
if(!NT_SUCCESS(Status))
{
DbgPrint("X70FsdCloseGetFileBasicInfo False %x \n",Status);
}
if(RetNewCallbackData != NULL)
{
FltFreeCallbackData(RetNewCallbackData);
}
return Status;
}
NTSTATUS X70FsdCloseSetFileBasicInfo(PFILE_OBJECT FileObject,PIRP_CONTEXT IrpContext,PFILE_BASIC_INFORMATION fbi)
{
NTSTATUS Status = STATUS_SUCCESS;
PFLT_CALLBACK_DATA RetNewCallbackData = NULL;
try
{
Status = FltAllocateCallbackData(IrpContext->FltObjects.Instance,FileObject,&RetNewCallbackData);
if(NT_SUCCESS(Status))
{
RetNewCallbackData->Iopb->MajorFunction = IRP_MJ_SET_INFORMATION;
RetNewCallbackData->Iopb->MinorFunction = 0;
RetNewCallbackData->Iopb->Parameters.SetFileInformation.FileInformationClass = FileBasicInformation;
RetNewCallbackData->Iopb->Parameters.SetFileInformation.Length = sizeof(FILE_BASIC_INFORMATION);
RetNewCallbackData->Iopb->Parameters.SetFileInformation.InfoBuffer = fbi;
RetNewCallbackData->Iopb->Parameters.SetFileInformation.AdvanceOnly = FALSE;
RetNewCallbackData->Iopb->Parameters.SetFileInformation.ParentOfTarget = NULL;
RetNewCallbackData->Iopb->TargetFileObject = FileObject;
FltPerformSynchronousIo(RetNewCallbackData);
Status = RetNewCallbackData->IoStatus.Status;
}
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
Status = GetExceptionCode();
DbgPrint("X70FsdCloseSetFileBasicInfo Exception %x \n",Status);
}
if(!NT_SUCCESS(Status))
{
DbgPrint("X70FsdCloseSetFileBasicInfo False %x \n",Status);
}
if(RetNewCallbackData != NULL)
{
FltFreeCallbackData(RetNewCallbackData);
}
return Status;
}
//释放FCB
BOOLEAN X70FsdFreeFcb(PFCB Fcb,PIRP_CONTEXT IrpContext)
{
NTSTATUS Status = STATUS_SUCCESS;
RemoveFcbList(Fcb->HashValue,NULL);
if(Fcb->CcFileObject != NULL)
{
if(!BooleanFlagOn( Fcb->FcbState, SCB_STATE_DELETE_ON_CLOSE ))
{
if(BooleanFlagOn(Fcb->FcbState,SCB_STATE_FILE_CHANGED))
{
FILE_BASIC_INFORMATION fbi = {0};
BOOLEAN bSetBasicInfo = FALSE;
Status = X70FsdCloseGetFileBasicInfo(Fcb->CcFileObject,IrpContext,&fbi);
if(NT_SUCCESS(Status))
{
bSetBasicInfo = TRUE;
}
Status = FltClose(Fcb->CcFileHandle);
if(bSetBasicInfo)
{
Status = X70FsdCloseSetFileBasicInfo(Fcb->CcFileObject,IrpContext,&fbi);
}
}
else
{
Status = FltClose(Fcb->CcFileHandle);
}
}
ObDereferenceObject(Fcb->CcFileObject);
Fcb->CcFileObject = NULL;
}
if(Fcb->Header.PagingIoResource != NULL)
{
ExDeleteResourceLite(Fcb->Header.PagingIoResource);
ExFreeToNPagedLookasideList(&G_EResourceLookasideList,Fcb->Header.PagingIoResource);
Fcb->Header.PagingIoResource = NULL;
}
if(Fcb->Header.Resource != NULL)
{
ExDeleteResourceLite(Fcb->Header.Resource);
ExFreeToNPagedLookasideList(&G_EResourceLookasideList,Fcb->Header.Resource);
Fcb->Header.Resource = NULL;
}
if(Fcb->EncryptResource != NULL)
{
ExDeleteResourceLite(Fcb->EncryptResource);
ExFreeToNPagedLookasideList(&G_EResourceLookasideList,Fcb->EncryptResource);
Fcb->EncryptResource = NULL;
}
if(Fcb->OutstandingAsyncEvent != NULL)
{
ExFreePool( Fcb->OutstandingAsyncEvent );
Fcb->OutstandingAsyncEvent = NULL;
}
if(Fcb->FileFullName.Buffer != NULL)
{
ExFreePool(Fcb->FileFullName.Buffer);
Fcb->FileFullName.Buffer = NULL;
}
if(FlagOn(Fcb->Header.Flags,FSRTL_FLAG_ADVANCED_HEADER))
{
FsRtlTeardownPerStreamContexts( &Fcb->Header);
}
FltUninitializeOplock( &Fcb->Oplock );
if(IS_FLT_FILE_LOCK())
{
FltUninitializeFileLock(Fcb->FileLock);
}
else
{
FsRtlUninitializeFileLock(Fcb->FileLock);
}
ExFreeToNPagedLookasideList(&G_FcbLookasideList,Fcb);
return TRUE;
}
VOID NetFileSetCacheProperty(PFILE_OBJECT FileObject,ACCESS_MASK DesiredAccess)
{
PFCB Fcb = FileObject->FsContext;
PCCB Ccb = FileObject->FsContext2;
CREATE_ACCESS_TYPE CreateAccess = CREATE_ACCESS_INVALID;
if(Fcb->CacheType == CACHE_DISABLE)
{
return;
}
if(FlagOn(DesiredAccess,FILE_READ_DATA) &&
!FlagOn(DesiredAccess,FILE_WRITE_DATA)||(FlagOn(DesiredAccess,FILE_APPEND_DATA)))
{
CreateAccess = CREATE_ACCESS_READ;
if(CcIsFileCached(FileObject) && Fcb->CacheType == CACHE_READWRITE)
{
Fcb->CacheType = CACHE_READ;
}
}
else if(!FlagOn(DesiredAccess,FILE_READ_DATA) &&
FlagOn(DesiredAccess,FILE_WRITE_DATA)||(FlagOn(DesiredAccess,FILE_APPEND_DATA)))
{
CreateAccess = CREATE_ACCESS_WRITE;
Fcb->CacheType = CACHE_READ;
}
else if(FlagOn(DesiredAccess,FILE_READ_DATA) &&
FlagOn(DesiredAccess,FILE_WRITE_DATA)||(FlagOn(DesiredAccess,FILE_APPEND_DATA)))
{
CreateAccess = CREATE_ACCESS_READWRITE;
}
return;
}
NTSTATUS CreateFcbAndCcb(__inout PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PIRP_CONTEXT IrpContext,
__in PUCHAR HashValue)
{
PFCB Fcb = NULL;
PCCB Ccb = NULL;
NTSTATUS status;
HANDLE FileHandle;
OBJECT_ATTRIBUTES ob;
IO_STATUS_BLOCK IoStatus;
PFILE_OBJECT FileObject,SwapFileObject;
BOOLEAN AdvancedHeader = FALSE;
try
{
FileObject = FltObjects->FileObject;
Fcb = X70FsdCreateFcb();
if(Fcb == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
Ccb = X70FsdCreateCcb();
if(Ccb == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
Fcb->Header.NodeTypeCode = LAYER_NTC_FCB;
Fcb->Header.NodeByteSize = sizeof(FCB);
Fcb->Header.PagingIoResource = X70FsdAllocateResource();
Fcb->Header.Resource = X70FsdAllocateResource();
Fcb->EncryptResource = X70FsdAllocateResource();
KeInitializeEvent(&Fcb->UninitializeCompleteEvent.Event,NotificationEvent,TRUE);
if(Fcb->Header.PagingIoResource == NULL || Fcb->Header.Resource == NULL || Fcb->EncryptResource == NULL)
{
try_return(status = STATUS_INSUFFICIENT_RESOURCES);
}
ExInitializeFastMutex( &Fcb->AdvancedFcbHeaderMutex );
FsRtlSetupAdvancedHeader( &Fcb->Header,&Fcb->AdvancedFcbHeaderMutex );
AdvancedHeader = TRUE;
if(IrpContext->CreateInfo.DecrementHeader)
{
IrpContext->CreateInfo.FileSize.QuadPart -= FILE_HEADER_LENGTH;
IrpContext->CreateInfo.FileAllocationSize.QuadPart -= FILE_HEADER_LENGTH;
}
Fcb->Header.FileSize.QuadPart = IrpContext->CreateInfo.FileSize.QuadPart ;
Fcb->Header.ValidDataLength.QuadPart = IrpContext->CreateInfo.FileSize.QuadPart;
if(IrpContext->CreateInfo.FileSize.QuadPart > IrpContext->CreateInfo.FileAllocationSize.QuadPart)
{
ULONG ClusterSize = IrpContext->SectorSize * IrpContext->SectorsPerAllocationUnit; //簇大小
LARGE_INTEGER TempLI;
TempLI.QuadPart = Fcb->Header.FileSize.QuadPart;
TempLI.QuadPart += ClusterSize;
TempLI.HighPart += (ULONG)( (LONGLONG)ClusterSize >> 32 );
if ( TempLI.LowPart == 0 )
{
TempLI.HighPart -= 1;
}
Fcb->Header.AllocationSize.LowPart = ( (ULONG)Fcb->Header.FileSize.LowPart + (ClusterSize - 1) ) & ( ~(ClusterSize - 1) );
Fcb->Header.AllocationSize.HighPart = TempLI.HighPart;
}
else
{
Fcb->Header.AllocationSize.QuadPart = IrpContext->CreateInfo.FileAllocationSize.QuadPart ;
}
if(IrpContext->CreateInfo.RealSize)
{
if(IrpContext->CreateInfo.RealFileSize.QuadPart > Fcb->Header.AllocationSize.QuadPart)
{
IrpContext->CreateInfo.RealFileSize.QuadPart = IrpContext->CreateInfo.FileSize.QuadPart;
}
else
{
Fcb->Header.FileSize.QuadPart = IrpContext->CreateInfo.RealFileSize.QuadPart ;
Fcb->Header.ValidDataLength.QuadPart = IrpContext->CreateInfo.RealFileSize.QuadPart ;
Fcb->ValidDataToDisk.QuadPart = IrpContext->CreateInfo.FileSize.QuadPart;
}
}
FltInitializeOplock( &Fcb->Oplock );
Fcb->Header.IsFastIoPossible = FastIoIsQuestionable;
if(IrpContext->CreateInfo.IsWriteHeader)
{
SetFlag(Fcb->FcbState,SCB_STATE_FILEHEADER_WRITED);
}
if(IrpContext->CreateInfo.Network)
{
//???
//SetFlag(Fcb->FcbState,SCB_STATE_DISABLE_LOCAL_BUFFERING);
//Fcb->Header.IsFastIoPossible = FastIoIsQuestionable;
}
Fcb->IsEnFile = IrpContext->CreateInfo.IsEnFile;
if(Fcb->IsEnFile && FlagOn(Fcb->FcbState,SCB_STATE_FILEHEADER_WRITED))
{
Fcb->FileHeaderLength = FILE_HEADER_LENGTH;
}
if(IS_FLT_FILE_LOCK())
{
Fcb->FileLock = FltAllocateFileLock(NULL,NULL);
}
else
{
Fcb->FileLock = FsRtlAllocateFileLock(NULL,NULL);
}
Fcb->CacheType = CACHE_ALLOW;
Fcb->FileType = IrpContext->CreateInfo.ProcType;
Fcb->FileFullName.Length = IrpContext->CreateInfo.nameInfo->Name.Length;
Fcb->FileFullName.MaximumLength = IrpContext->CreateInfo.nameInfo->Name.MaximumLength ;
Fcb->FileFullName.Buffer = FsRtlAllocatePoolWithTag(NonPagedPool,Fcb->FileFullName.MaximumLength,'ffn');
RtlCopyMemory(Fcb->FileFullName.Buffer,IrpContext->CreateInfo.nameInfo->Name.Buffer,Fcb->FileFullName.MaximumLength);
aes_ecb_encrypt(Fcb->FileKey,IrpContext->CreateInfo.FileKey,headskey);
if(aes_setup(Fcb->FileKey,sizeof(Fcb->FileKey),0,&Fcb->CryptionKey) != CRYPT_OK)
{
try_return(status = STATUS_UNSUCCESSFUL);
}
if(!IrpContext->CreateInfo.Network)
{
ULONG Options = FILE_NON_DIRECTORY_FILE;
#ifdef USE_CACHE_READWRITE
SetFlag(Options,FILE_WRITE_THROUGH); //加上直接写入文件。
#endif
InitializeObjectAttributes(&ob,&Fcb->FileFullName, OBJ_KERNEL_HANDLE|OBJ_CASE_INSENSITIVE, NULL,NULL) ;
status = FltCreateFile(FltObjects->Filter,
FltObjects->Instance,
&Fcb->CcFileHandle,
FILE_SPECIAL_ACCESS,
&ob,
&IoStatus,
NULL,
FILE_ATTRIBUTE_NORMAL,
0,
FILE_OPEN,
Options,
NULL,
0,
0
) ;
if(!NT_SUCCESS(status))
{
try_return(status);
}
status = ObReferenceObjectByHandle(Fcb->CcFileHandle,0,*IoFileObjectType,KernelMode,&Fcb->CcFileObject,NULL);
if(!NT_SUCCESS(status))
{
FltClose(Fcb->CcFileHandle);
try_return(status);
}
}
else
{
Fcb->CcFileObject = NULL;
}
if(InsertFcbList(HashValue,&Fcb))
{
RtlCopyMemory(Fcb->HashValue,HashValue,MD5_LENGTH);
Ccb->StreamFileInfo.StreamHandle = IrpContext->CreateInfo.StreamHandle;
Ccb->StreamFileInfo.StreamObject = IrpContext->CreateInfo.StreamObject;
Ccb->StreamFileInfo.FO_Resource = X70FsdAllocateResource();
if(IrpContext->CreateInfo.Network)
{
SetFlag(Ccb->CcbState,CCB_FLAG_NETWORK_FILE);
}
Ccb->FileAccess = IrpContext->CreateInfo.FileAccess;
RtlCopyMemory(Ccb->ProcessGuid,IrpContext->CreateInfo.ProcessGuid,GUID_SIZE);
ExInitializeFastMutex( &Ccb->StreamFileInfo.FileObjectMutex );
}
else
{
try_return(status = STATUS_INSUFFICIENT_RESOURCES);
}
IrpContext->CreateInfo.Fcb = Fcb;
IrpContext->CreateInfo.Ccb = Ccb;
try_return(status = STATUS_SUCCESS);
try_exit:NOTHING;
}
finally
{
if(AbnormalTermination())
{
status = STATUS_UNSUCCESSFUL;
}
if(!NT_SUCCESS(status))
{
if(Fcb != NULL)
{
X70FsdFreeFcb(Fcb,IrpContext);
FileObject->FsContext = NULL;
}
if(Ccb != NULL)
{
if(Ccb->StreamFileInfo.FO_Resource != NULL)
{
ExDeleteResourceLite(Ccb->StreamFileInfo.FO_Resource);
ExFreeToNPagedLookasideList(&G_EResourceLookasideList,Ccb->StreamFileInfo.FO_Resource);
Ccb->StreamFileInfo.FO_Resource = NULL;
}
ExFreeToNPagedLookasideList(&G_CcbLookasideList,Ccb);
FileObject->FsContext2 = NULL;
}
}
}
return status;
}
//获得文件信息
NTSTATUS
MyGetFileStandardInfo(
__in PFLT_CALLBACK_DATA Data,
__in PCFLT_RELATED_OBJECTS FltObjects,
__in PFILE_OBJECT FileObject,
__in PLARGE_INTEGER FileAllocationSize,
__in PLARGE_INTEGER FileSize,
__in PBOOLEAN bDirectory
)
{
NTSTATUS status = STATUS_SUCCESS ;
FILE_STANDARD_INFORMATION sFileStandardInfo ;
//向下层Call
status = FltQueryInformationFile(FltObjects->Instance,
FileObject,
&sFileStandardInfo,
sizeof(FILE_STANDARD_INFORMATION),
FileStandardInformation,
NULL
) ;
if (NT_SUCCESS(status))
{
if (NULL != FileSize)
*FileSize = sFileStandardInfo.EndOfFile ;
if (NULL != FileAllocationSize)
*FileAllocationSize = sFileStandardInfo.AllocationSize ;
if (NULL != bDirectory)
*bDirectory = sFileStandardInfo.Directory ;
}
return status ;
}
BOOLEAN HashFilePath(PUNICODE_STRING pFileFullPath,PUCHAR HashValue)
{