404 lines
8.3 KiB
C
404 lines
8.3 KiB
C
/*++
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Copyright (c) 1996 Microsoft Corporation
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Abstract:
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This module contains the common header information for the EFS
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file system filter driver.
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Author:
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Robert Gu (robertg) 29-Oct-1996
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Enviroment:
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Kernel Mode Only
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Revision History:
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--*/
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#ifndef EFS_H
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#define EFS_H
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#include "ntifs.h"
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//
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// BYTE is required by des.h
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// PBYTE is required by des3.h
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//
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typedef unsigned char BYTE;
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typedef unsigned long DWORD;
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typedef unsigned char *PBYTE;
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#include "fipsapi.h"
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//#include "des.h"
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//#include "tripldes.h"
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#include "aes.h"
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#include "ntfsexp.h"
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#include "efsstruc.h"
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#if DBG
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#define EFSTRACEALL 0x00000001
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#define EFSTRACELIGHT 0x00000002
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#define EFSTRACEMED 0x00000004
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#define EFSSTOPALL 0x00000010
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#define EFSSTOPLIGHT 0x00000020
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#define EFSSTOPMED 0x00000040
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#endif // DBG
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#ifndef CALG_DES
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//
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// Definition from sdk\inc\wincrypt.h
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// Including wincrypt.h causes too much work.
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//
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#define ALG_CLASS_DATA_ENCRYPT (3 << 13)
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#define ALG_TYPE_BLOCK (3 << 9)
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#define ALG_SID_DES 1
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#define ALG_SID_3DES 3
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#define ALG_SID_DESX 4
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#define ALG_SID_AES_256 16
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#define ALG_SID_AES 17
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#define CALG_DES (ALG_CLASS_DATA_ENCRYPT|ALG_TYPE_BLOCK|ALG_SID_DES)
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#define CALG_DESX (ALG_CLASS_DATA_ENCRYPT|ALG_TYPE_BLOCK|ALG_SID_DESX)
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#define CALG_3DES (ALG_CLASS_DATA_ENCRYPT|ALG_TYPE_BLOCK|ALG_SID_3DES)
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#define CALG_AES_256 (ALG_CLASS_DATA_ENCRYPT|ALG_TYPE_BLOCK|ALG_SID_AES_256)
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#define CALG_AES (ALG_CLASS_DATA_ENCRYPT|ALG_TYPE_BLOCK|ALG_SID_AES)
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#endif
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//
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// Define the device extension structure for this driver's extensions.
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//
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#define EFSFILTER_DEVICE_TYPE 0x1309
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#define EFS_EVENTDEPTH 3
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#define EFS_CONTEXTDEPTH 5
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#define EFS_KEYDEPTH 30
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#define EFS_ALGDEPTH 3
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//
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// Define the constants used in Open Cache
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//
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#define DefaultTimeExpirePeriod 5 * 10000000 // 5 seconds
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#define MINCACHEPERIOD 2
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#define MAXCACHEPERIOD 30
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#define EFS_CACHEDEPTH 5
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#define EFS_STREAM_NORMAL 0
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#define EFS_STREAM_TRANSITION 1
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#define EFS_STRNAME_LENGTH 6
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#define EFS_FSCTL_HEADER_LENGTH 3 * sizeof( ULONG )
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//
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// Define test MACRO
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//
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#define CheckValidKeyBlock(PContext, Msg)
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/*
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#define CheckValidKeyBlock(PContext, Msg) { \
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if (PContext) { \
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if (((PKEY_BLOB) PContext)->KeyLength != DESX_KEY_BLOB_LENGTH){ \
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DbgPrint(Msg); \
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} \
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ASSERT(((PKEY_BLOB) PContext)->KeyLength == DESX_KEY_BLOB_LENGTH); \
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} \
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}
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*/
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#define FreeMemoryBlock(PContext) { \
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ExFreeToNPagedLookasideList(((PKEY_BLOB)(*PContext))->MemSource, *PContext); \
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*PContext = NULL; \
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}
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/*
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#define FreeMemoryBlock(PContext) { \
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PNPAGED_LOOKASIDE_LIST MemSource; \
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MemSource = ((PKEY_BLOB)(*PContext))->MemSource; \
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RtlFillMemory(*PContext, DESX_KEY_BLOB_LENGTH, 0x45);\
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ExFreeToNPagedLookasideList(MemSource, *PContext); \
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*PContext = NULL; \
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}
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*/
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typedef CSHORT NODE_TYPE_CODE, *PNODE_TYPE_CODE;
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typedef CSHORT NODE_BYTE_SIZE, *PNODE_BYTE_SIZE;
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#define NTC_UNDEFINED ((NODE_TYPE_CODE)0x0000)
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#define EFS_NTC_DATA_HEADER ((NODE_TYPE_CODE)0x0E04)
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#define DES_KEY_BLOB_LENGTH (2 * sizeof(ULONG) + sizeof(PNPAGED_LOOKASIDE_LIST) + DES_TABLESIZE)
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#define DESX_KEY_BLOB_LENGTH (2 * sizeof(ULONG) + sizeof(PNPAGED_LOOKASIDE_LIST) + DESX_TABLESIZE)
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#define DES3_KEY_BLOB_LENGTH (2 * sizeof(ULONG) + sizeof(PNPAGED_LOOKASIDE_LIST) + DES3_TABLESIZE)
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#define AES_KEY_BLOB_LENGTH_256 (2 * sizeof(ULONG) + sizeof(PNPAGED_LOOKASIDE_LIST) + AES_TABLESIZE_256)
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//
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// EFS device object extension
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//
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typedef struct _DEVICE_EXTENSION {
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CSHORT Type;
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CSHORT Size;
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PDEVICE_OBJECT FileSystemDeviceObject;
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PDEVICE_OBJECT RealDeviceObject;
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BOOLEAN Attached;
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} DEVICE_EXTENSION, *PDEVICE_EXTENSION;
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//
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// EFS context block. Attached to CREATE Irp
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//
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typedef struct _EFS_CONTEXT {
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//
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// Status information
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//
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ULONG Status;
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ULONG Flags;
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PVOID EfsStreamData;
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KEVENT FinishEvent;
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} EFS_CONTEXT, *PEFS_CONTEXT;
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//
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// The keyBlob.
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//
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typedef struct _KEY_BLOB {
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ULONG KeyLength;
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//
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// Indicate what kind of encryption used
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//
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ULONG AlgorithmID;
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//
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// Where the memory comes from
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//
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PNPAGED_LOOKASIDE_LIST MemSource;
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UCHAR Key[1];
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} KEY_BLOB, *PKEY_BLOB;
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typedef struct _KEY_BLOB_RAMPOOL {
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ULONG AlgorithmID;
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PNPAGED_LOOKASIDE_LIST MemSourceList;
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LIST_ENTRY MemSourceChain;
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} KEY_BLOB_RAMPOOL, *PKEY_BLOB_RAMPOOL;
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//
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// EFS Open Cache Node
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//
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typedef struct _OPEN_CACHE {
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GUID EfsId;
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PTOKEN_USER UserId;
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LARGE_INTEGER TimeStamp;
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LIST_ENTRY CacheChain;
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} OPEN_CACHE, *POPEN_CACHE;
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//
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// The EFS_DATA keeps global data in the EFS file system in-memory
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// This structure must be allocated from non-paged pool.
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//
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typedef struct _EFS_DATA {
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//
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// The type and size of this record (must be EFS_NTC_DATA_HEADER)
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//
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NODE_TYPE_CODE NodeTypeCode;
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NODE_BYTE_SIZE NodeByteSize;
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DWORD EfsDriverCacheLength; // Cache valid length 2 - 30 seconds
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//
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// A Lookaside List for event object
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// The event object are used in synchronization.
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//
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NPAGED_LOOKASIDE_LIST EfsEventPool;
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//
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// A Lookaside List for EFS context
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// The EFS context is used in Create Irp.
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//
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NPAGED_LOOKASIDE_LIST EfsContextPool;
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//
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// A lookaside list for open operation cache
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//
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PAGED_LOOKASIDE_LIST EfsOpenCachePool;
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LIST_ENTRY EfsOpenCacheList;
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FAST_MUTEX EfsOpenCacheMutex;
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//
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// Lookaside Lists for key blob
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//
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LIST_ENTRY EfsKeyLookAsideList;
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FAST_MUTEX EfsKeyBlobMemSrcMutex;
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PAGED_LOOKASIDE_LIST EfsMemSourceItem;
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NPAGED_LOOKASIDE_LIST EfsLookAside;
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//
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// Session key.
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// Used to decrypt the FSCTL input buffer.
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//
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UCHAR SessionKey[DES_KEYSIZE];
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UCHAR SessionDesTable[DES_TABLESIZE];
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PRKPROCESS LsaProcess;
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//
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// Flag indicate EFS is ready
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//
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BOOLEAN EfsInitialized;
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BOOLEAN AllocMaxBuffer;
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HANDLE InitEventHandle;
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//PDEVICE_OBJECT FipsDeviceObject;
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PFILE_OBJECT FipsFileObject;
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FIPS_FUNCTION_TABLE FipsFunctionTable;
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//
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// Efs special attribute name
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//
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UNICODE_STRING EfsName;
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} EFS_DATA, *PEFS_DATA;
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//
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// This macro returns TRUE if a flag in a set of flags is on and FALSE
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// otherwise
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//
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//#ifndef BooleanFlagOn
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//#define BooleanFlagOn(F,SF) ( \
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// (BOOLEAN)(((F) & (SF)) != 0) \
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//)
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//#endif
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//#ifndef SetFlag
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//#define SetFlag(Flags,SingleFlag) { \
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// (Flags) |= (SingleFlag); \
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//}
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//#endif
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//#ifndef ClearFlag
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//#define ClearFlag(Flags,SingleFlag) { \
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// (Flags) &= ~(SingleFlag); \
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//}
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//#endif
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//
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// Function prototypes
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//
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//
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// Define driver entry routine.
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//
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NTSTATUS
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EfsInitialization(
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void
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);
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NTSTATUS
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EFSCreate(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PFILE_OBJECT FileObject
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);
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DWORD
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GetKeyBlobLength(
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ULONG AlgID
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);
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PKEY_BLOB
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GetKeyBlobBuffer(
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ULONG AlgID
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);
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BOOLEAN
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SetKeyTable(
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PKEY_BLOB KeyBlob,
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PEFS_KEY EfsKey
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);
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NTSTATUS
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EFSFsControl(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PFILE_OBJECT FileObject
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);
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NTSTATUS
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EFSPostCreate(
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IN PDEVICE_OBJECT DeviceObject,
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IN PIRP Irp,
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IN PEFS_CONTEXT EfsContext,
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IN ULONG OpenType
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);
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NTSTATUS
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EFSFilePostCreate(
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IN PDEVICE_OBJECT VolDo,
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IN PIRP Irp,
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IN PFILE_OBJECT FileObject,
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IN NTSTATUS Status,
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IN OUT PVOID *PCreateContext
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);
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VOID
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EfsGetSessionKey(
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IN PVOID StartContext
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);
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BOOLEAN
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EfsInitFips(
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VOID
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);
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//
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// private PS kernel funtions (this should REALLY be including ntos.h or ps.h)
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//
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NTKERNELAPI
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VOID
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PsRevertToSelf(
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VOID
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);
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NTKERNELAPI
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NTSTATUS
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PsLookupProcessByProcessId(
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IN HANDLE ProcessId,
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OUT PEPROCESS *Process
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);
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#endif
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