读取NTFS的USN（获取文件的历史操作记录，即使这个文件已被删除）

原文转载于:http://blog.okbase.net/bruceteen/archive/242.html

上回说到NTFS USN会记录下文件的所有操作，但默认情况下并没有激活这一功能，所以不用担心。在非激活状态，它也只剩下快速查找文件的功能。
这回，假设USN JOURNAL被激活了（你可以用控制台命令fsutil usn，或上回说到的FSCTL_CREATE_USN_JOURNAL来开启这一功能），怎么回窥过去的操作？
为此，写了段代码来进行试验，程序是检索 123.txt 操作历史（记录空间不是无穷大，过旧的信息会被覆盖掉），输出如下

从输出可以看出，先在\share\x目录下创建了"新建文本文档.txt"，后又更名为"123.txt"，最后连其父目录一起删进了回收站。

试验代码如下（代码中有好多冗余调用，因为这只是试验代码而已）：

#define _CRT_SECURE_NO_WARNINGS
#include <windows.h>
#include <string>
#include <deque>
using namespace std;

struct MY_USN_RECORD
{
DWORDLONG FileReferenceNumber;
DWORDLONG ParentFileReferenceNumber;
LARGE_INTEGER TimeStamp;
DWORD Reason;
WCHAR FileName[MAX_PATH];
};
HANDLE hVol = INVALID_HANDLE_VALUE;
bool EnumUsnRecord( const char* drvname,std::deque<MY_USN_RECORD>& con )
{
bool ret = false;

char FileSystemName[MAX_PATH+1];
DWORD MaximumComponentLength;
if( GetVolumeInformationA( (std::string(drvname)+":\\").c_str(),&MaximumComponentLength,FileSystemName,MAX_PATH+1)
&& 0==strcmp(FileSystemName,"NTFS") ) // 判断是否为 NTFS 格式
{
hVol = CreateFileA( (std::string("\\\\.\\")+drvname+":").c_str() // 需要管理员权限，无奈
,GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,NULL);
if( hVol != INVALID_HANDLE_VALUE )
{
DWORD br;
USN_JOURNAL_DATA qujd;
if( DeviceIoControl( hVol,FSCTL_QUERY_USN_JOURNAL,&qujd,sizeof(qujd),&br,NULL ) )
{
char buffer[0x1000];
DWORD BytesReturned;
{
READ_USN_JOURNAL_DATA rujd = { 0,-1,qujd.UsnJournalID };
for( ; DeviceIoControl(hVol,FSCTL_READ_USN_JOURNAL,&rujd,sizeof(rujd),buffer,_countof(buffer),&BytesReturned,NULL); rujd.StartUsn=*(USN*)&buffer )
{
DWORD dwRetBytes = BytesReturned - sizeof(USN);
PUSN_RECORD UsnRecord = (PUSN_RECORD)((PCHAR)buffer+sizeof(USN));
if( dwRetBytes==0 )
{
ret = true;
break;
}

while( dwRetBytes > 0 )
{
MY_USN_RECORD myur = { UsnRecord->FileReferenceNumber,UsnRecord->ParentFileReferenceNumber,UsnRecord->TimeStamp,UsnRecord->Reason };
memcpy( myur.FileName,UsnRecord->FileName,UsnRecord->FileNameLength );
myur.FileName[UsnRecord->FileNameLength/2] = L'\0';

con.push_back( myur );

dwRetBytes -= UsnRecord->RecordLength;
UsnRecord = (PUSN_RECORD)( (PCHAR)UsnRecord + UsnRecord->RecordLength );
}
}
}
}

//CloseHandle( hVol );
}
}

return ret;
}

#include <set>
int main()
{
// 获得所有变化记录
std::deque<MY_USN_RECORD> con;
EnumUsnRecord( "D",con );

// 搜寻文件名为"test.txt"的文件号（可能有多个）
std::set<DWORDLONG> con2;
for( std::deque<MY_USN_RECORD>::const_iterator itor=con.begin(); itor!=con.end(); ++itor )
{
const MY_USN_RECORD& mur = *itor;
if( _wcsicmp(mur.FileName,L"123.txt") == 0 )
{
con2.insert( mur.FileReferenceNumber );
}
}

// 遍历其历史操作
setlocale( LC_CTYPE,"chs" );
for( std::set<DWORDLONG>::const_iterator itor2=con2.begin(); itor2!=con2.end(); ++itor2 )
{
for( std::deque<MY_USN_RECORD>::const_iterator itor=con.begin(); itor!=con.end(); ++itor )
{
const MY_USN_RECORD& mur = *itor;
if( *itor2 == mur.FileReferenceNumber )
{
FILETIME timestamp;
FileTimeToLocalFileTime( &(FILETIME&)mur.TimeStamp,&timestamp );
SYSTEMTIME st;
FileTimeToSystemTime( &timestamp,&st );
printf( "%04d-%02d-%02d %02d:%02d:%02d ",st.wYear,st.wMonth,st.wDay,st.wHour,st.wMinute,st.wSecond );

if( mur.Reason&USN_REASON_DATA_OVERWRITE )
printf( "%s|","DATA_OVERWRITE" );
if( mur.Reason&USN_REASON_DATA_EXTEND )
printf( "%s|","DATA_EXTEND" );
if( mur.Reason&USN_REASON_DATA_TRUNCATION )
printf( "%s|","DATA_TRUNCATION" );
if( mur.Reason&USN_REASON_NAMED_DATA_OVERWRITE )
printf( "%s|","NAMED_DATA_OVERWRITE" );
if( mur.Reason&USN_REASON_NAMED_DATA_EXTEND )
printf( "%s|","NAMED_DATA_EXTEND" );
if( mur.Reason&USN_REASON_NAMED_DATA_TRUNCATION )
printf( "%s|","NAMED_DATA_TRUNCATION" );
if( mur.Reason&USN_REASON_FILE_CREATE )
printf( "%s|","FILE_CREATE" );
if( mur.Reason&USN_REASON_FILE_DELETE )
printf( "%s|","FILE_DELETE" );
if( mur.Reason&USN_REASON_EA_CHANGE )
printf( "%s|","EA_CHANGE" );
if( mur.Reason&USN_REASON_SECURITY_CHANGE )
printf( "%s|","SECURITY_CHANGE" );
if( mur.Reason&USN_REASON_RENAME_OLD_NAME )
printf( "%s|","RENAME_OLD_NAME" );
if( mur.Reason&USN_REASON_RENAME_NEW_NAME )
printf( "%s|","RENAME_NEW_NAME" );
if( mur.Reason&USN_REASON_INDEXABLE_CHANGE )
printf( "%s|","INDEXABLE_CHANGE" );
if( mur.Reason&USN_REASON_BASIC_INFO_CHANGE )
printf( "%s|","BASIC_INFO_CHANGE" );
if( mur.Reason&USN_REASON_HARD_LINK_CHANGE )
printf( "%s|","HARD_LINK_CHANGE" );
if( mur.Reason&USN_REASON_COMPRESSION_CHANGE )
printf( "%s|","COMPRESSION_CHANGE" );
if( mur.Reason&USN_REASON_ENCRYPTION_CHANGE )
printf( "%s|","ENCRYPTION_CHANGE" );
if( mur.Reason&USN_REASON_OBJECT_ID_CHANGE )
printf( "%s|","OBJECT_ID_CHANGE" );
if( mur.Reason&USN_REASON_REPARSE_POINT_CHANGE )
printf( "%s|REPARSE_POINT_CHANGE","" );
if( mur.Reason&USN_REASON_STREAM_CHANGE )
printf( "%s|","STREAM_CHANGE" );
if( mur.Reason&USN_REASON_TRANSACTED_CHANGE )
printf( "%s|","TRANSACTED_CHANGE" );
if( mur.Reason&USN_REASON_CLOSE )
printf( "%s|","CLOSE" );

printf( "\n " );
bool PrintFullPath( const MY_USN_RECORD& mur,const std::deque<MY_USN_RECORD>& con );
PrintFullPath(mur,con);

printf( "\n" );
}
}

printf( "\n" );
}

if( hVol != INVALID_HANDLE_VALUE )
CloseHandle( hVol );

return 0;
}

bool PrintFullPath( const MY_USN_RECORD& mur,const std::deque<MY_USN_RECORD>& con )
{
if( (mur.FileReferenceNumber&0x0000FFFFFFFFFFFF) == 5 )
return true;

std::deque<MY_USN_RECORD>::const_iterator recent = con.end();
for( std::deque<MY_USN_RECORD>::const_iterator itor=con.begin(); itor!=con.end() && itor->TimeStamp.QuadPart<=mur.TimeStamp.QuadPart; ++itor )
{
if( itor->FileReferenceNumber == mur.ParentFileReferenceNumber )
recent = itor;
}
if( recent != con.end() )// 它的父目录可能也已被删除，所以要先在记录集中找找
{
bool r= PrintFullPath(*recent,con);
printf( "\\%S",mur.FileName );
return r;
}

bool GetFullPathByFileReferenceNumber( HANDLE hVol,DWORDLONG FileReferenceNumber );
bool r = GetFullPathByFileReferenceNumber(hVol,mur.ParentFileReferenceNumber); //如果记录中没有，再去看看这个文件实际存在否
if( r )
printf( "\\%S",mur.FileName );
else
printf( "???\\%S",mur.FileName );
return r;
}

bool GetFullPathByFileReferenceNumber( HANDLE hVol,DWORDLONG FileReferenceNumber ) //根据文件号获得全路径，上篇文章已经说过，共有3中方法，这是其中之一，代码简单但效率不高
{
typedef ULONG (__stdcall *PNtCreateFile)(
PHANDLE FileHandle,
ULONG DesiredAccess,
PVOID ObjectAttributes,
PVOID IoStatusBlock,
PLARGE_INTEGER AllocationSize,
ULONG FileAttributes,
ULONG ShareAccess,
ULONG CreateDisposition,
ULONG CreateOptions,
PVOID EaBuffer,
ULONG EaLength );
PNtCreateFile NtCreatefile = (PNtCreateFile)GetProcAddress( GetModuleHandle(L"ntdll.dll"),"NtCreateFile" );

typedef struct _UNICODE_STRING {
USHORT Length,MaximumLength;
PWCH Buffer;
} UNICODE_STRING,*PUNICODE_STRING;
UNICODE_STRING fidstr = { 8,8,(PWSTR)&FileReferenceNumber };

typedef struct _OBJECT_ATTRIBUTES {
ULONG Length;
HANDLE RootDirectory;
PUNICODE_STRING ObjectName;
ULONG Attributes;
PVOID SecurityDescriptor;
PVOID SecurityQualityOfService;
} OBJECT_ATTRIBUTES;
const ULONG OBJ_CASE_INSENSITIVE = 0x00000040UL;
OBJECT_ATTRIBUTES oa = { sizeof(OBJECT_ATTRIBUTES),hVol,&fidstr,OBJ_CASE_INSENSITIVE,0 };

HANDLE hFile;
ULONG iosb[2];
const ULONG FILE_OPEN_BY_FILE_ID = 0x00002000UL;
const ULONG FILE_OPEN = 0x00000001UL;
ULONG status = NtCreatefile( &hFile,GENERIC_ALL,&oa,iosb,FILE_ATTRIBUTE_NORMAL,FILE_OPEN,FILE_OPEN_BY_FILE_ID,0 );
if( status == 0 )
{
typedef struct _IO_STATUS_BLOCK {
union {
NTSTATUS Status;
PVOID Pointer;
};
ULONG_PTR Information;
} IO_STATUS_BLOCK,*PIO_STATUS_BLOCK;
typedef enum _FILE_INFORMATION_CLASS {
// ……
FileNameInformation = 9
// ……
} FILE_INFORMATION_CLASS,*PFILE_INFORMATION_CLASS;
typedef NTSTATUS (__stdcall *PNtQueryInformationFile)(
HANDLE FileHandle,
PIO_STATUS_BLOCK IoStatusBlock,
PVOID FileInformation,
DWORD Length,
FILE_INFORMATION_CLASS FileInformationClass );
PNtQueryInformationFile NtQueryInformationFile = (PNtQueryInformationFile)GetProcAddress( GetModuleHandle(L"ntdll.dll"),"NtQueryInformationFile" );

typedef struct _OBJECT_NAME_INFORMATION {
UNICODE_STRING Name;
} OBJECT_NAME_INFORMATION,*POBJECT_NAME_INFORMATION;
IO_STATUS_BLOCK IoStatus;
size_t allocSize = sizeof(OBJECT_NAME_INFORMATION) + MAX_PATH*sizeof(WCHAR);
POBJECT_NAME_INFORMATION pfni = (POBJECT_NAME_INFORMATION)operator new(allocSize);
status = NtQueryInformationFile(hFile,&IoStatus,pfni,allocSize,FileNameInformation);
if( status == 0 )
{
printf( "%.*S",pfni->Name.Length/2,&pfni->Name.Buffer );
}
operator delete(pfni);

CloseHandle(hFile);
}

return status == 0;}

读取NTFS的USN（获取文件的历史操作记录，即使这个文件已被删除）

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