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int writeUSN(UsnRec* uRec)
{
SYSTEMTIME stUTC, stCurrent, stOld;
FILETIME cur, fOld;
char timeDisplay[30];
//creat 2 timestamps, one 1 year in future and one from 1980
GetSystemTime(&stCurrent);
GetSystemTime(&stOld);
stOld.wYear = 1980;
stCurrent.wYear+=1;
SystemTimeToFileTime(&stCurrent, &cur);
SystemTimeToFileTime(&stOld, &fOld);
if ((CompareFileTime(&cur,&uRec->timestamp) == 1) && (CompareFileTime(&fOld,&uRec->timestamp) == -1))
{
FileTimeToSystemTime(&uRec->timestamp,&stUTC);
sprintf(timeDisplay,"%04d\\%02d\\%02d %02d:%02d:%02d\0",stUTC.wYear,stUTC.wMonth,stUTC.wDay,stUTC.wHour,stUTC.wMinute,stUTC.wSecond);
}
else
{
return 0;
}
fprintf(fileUSN,"\"%s\",\"%s\",\"%s\",\"%llu\"\n", uRec->fileName, uRec->reasonText,timeDisplay,uRec->timestamp);
return 1;
}
void reasonString(UsnRec* uRec)
{
int check = uRec->reason & 0x000000FF;
int check4 = (uRec->reason >> 8) & 0x000000FF;
int check6 = (uRec->reason >> 16) & 0x000000FF;
int check8 = (uRec->reason >> 24) & 0x000000FF;
//all for bytes 7 - 8
if (check8 & 0x80)
{
strncat(uRec->reasonText, "File Closed.\0", 250);
}
//all for bytes 5 - 6
if (check6 & 0x04)
{
strncat(uRec->reasonText, "File Encryption Changed.\0", 250);
}
if (check6 & 0x02)
{
strncat(uRec->reasonText, "File Compression Changed.\0", 250);
}
//all for bytes 3 - 4
if (check4 & 0x80)
{
strncat(uRec->reasonText, "File/folder Attributes Changed.\0", 250);
}
if (check & 0x20)
{
strncat(uRec->reasonText, "File Renamed (New name).\0", 250);
}
if (check & 0x10)
{
strncat(uRec->reasonText, "File Renamed (Old name).\0", 250);
}
if (check & 0x04)
{
strncat(uRec->reasonText, "Extended attributes changed.\0", 250);
}
if (check4 & 0x02)
{
strncat(uRec->reasonText, "File/folder Deleted.\0", 250);
}
if (check4 & 0x01)
{
strncat(uRec->reasonText, "File/folder Created.\0",250);
}
//all for bytes 1 - 2
if (check & 0x20)
{
strncat(uRec->reasonText, "File Extended (Added to).\0", 250);
}
if (check & 0x01)
{
strncat(uRec->reasonText, "File Overwritten.\0", 250);
}
if (check & 0x04)
{
strncat(uRec->reasonText, "File truncated.\0", 250);
}
if (uRec->reasonText[0] == '\0')
{
sprintf(uRec->reasonText, "Unknown action - %l \0", uRec->reason);
}
}
int extractRecord()
{
UsnRec uRec;
unsigned char chrLen[4], chrMin[4], chrFileRef[8], chrParentRef[8],chrUSN[4], chrTimestamp[8],chrReason[4],chrSecurity[4],chrSource[4],temp[200];
unsigned long long filePointer;
filePointer = bufferPointer;
memcpy(chrLen,(char*)&fileBuffer[filePointer], 4);
uRec.recLen = *(DWORD*)&chrLen;
if (uRec.recLen > 512)
{
//record too big.
return 0;
}
filePointer += 4;
uRec.majVer = fileBuffer[filePointer];
filePointer += 4;
memcpy(chrMin,(char*)&fileBuffer[filePointer], 4);
uRec.minVer = *(DWORD*)&chrMin;
filePointer += 4;
memcpy(chrFileRef,(char*)&fileBuffer[filePointer], 8);
uRec.FileRef = *(DWORDLONG*)&chrFileRef;
filePointer += 8;
memcpy(chrParentRef,(char*)&fileBuffer[filePointer], 8);
uRec.ParentFileRef = *(DWORDLONG*)&chrParentRef;
filePointer += 8;
memcpy((char*)chrUSN,(char*)&fileBuffer[filePointer], 4);
uRec.usn = *(USN*)&chrUSN;
filePointer += 4;
memcpy(chrTimestamp,(char*)&fileBuffer[filePointer], 8);
uRec.timestamp = *(FILETIME*)&chrTimestamp;
filePointer += 8;
memcpy(chrReason,(char*)&fileBuffer[filePointer], 4);
uRec.reason = *(DWORD*)&chrReason;
filePointer += 4;
memcpy(chrSource,(char*)&fileBuffer[filePointer], 4);
uRec.sourceinfo = *(DWORD*)&chrSource;
filePointer += 4;
memcpy(chrSecurity,(char*)&fileBuffer[filePointer], 4);
uRec.securityID = *(DWORD*)&chrSecurity;
filePointer += 4;
uRec.FileNameLength = fileBuffer[bufferPointer + 56];
if (uRec.FileNameLength > 300)
{
//filename length too long
return 0;
}
memcpy(temp,&fileBuffer[bufferPointer + 59], uRec.FileNameLength);
for (int i=1; i <= uRec.FileNameLength; i+= 2)
{
uRec.fileName[i/2] = temp[i];
}
uRec.fileName[(uRec.FileNameLength/2)] = '\0';
int lenCheck = 60 + uRec.FileNameLength;
do
{
if (lenCheck % 8 !=0)
{
lenCheck++;
}
} while (lenCheck % 8 !=0);
if (uRec.recLen != lenCheck)
{
//sizes do not match
return 0;
}
uRec.reasonText[0] = '\0';
reasonString(&uRec);
int written = writeUSN(&uRec);
if (written == 1)
{
totalRecFound++;
//updateStatus();
}
//clean up
return 1;
}
int checkForRecords()
{
if (fileBuffer[bufferPointer+1] == 0x00 & fileBuffer[bufferPointer+2] == 0x00 && fileBuffer[bufferPointer+3] == 0x00)
{
if (fileBuffer[bufferPointer + 4] == 0x02)
{
if (fileBuffer[bufferPointer + 58] == 60)
{
int result = extractRecord();
if (result == 1)
{
bufferPointer += 60;
}
}
}
}
return 0;
}
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