/**
* Runs file identification for the binary file specified by targetFile
*
* @param targetFile The binary file to be identified
*/
public void runFileIdentification(IByteReader targetFile)
{
//record all positive identifications
for (int iSig = 0; iSig < this.getNumInternalSignatures(); iSig++)
{
InternalSignature internalSig = this.getInternalSignature(iSig);
//System.out.println("============================ Running identification for signature ID = "+internalSig.getID()+ " ===========================");
if (internalSig.isFileCompliant(targetFile))
{
//File matches this internal signature
targetFile.SetPositiveIdentification();
for (int i = 0; i < internalSig.getNumFileFormats(); i++)
{
FileFormatHit fileHit = new FileFormatHit(internalSig.getFileFormat(i), AnalysisController.HIT_TYPE_POSITIVE_GENERIC_OR_SPECIFIC, internalSig.isSpecific(), "");
targetFile.AddHit(fileHit);
}
}
}
//remove any hits for which there is a higher priority hit
if (targetFile.GetNumberOfHits() > 1)
{
this.removeLowerPriorityHits(targetFile);
}
//carry out file extension checking
this.checkExtension(targetFile);
// if there are still no hits then classify as unidentified
if (targetFile.GetNumberOfHits() == 0)
{
targetFile.SetNoIdentification();
}
}
/**
* Determines the file extension
* If the file has got some positive hits, then check these against this extension
* If the file has not got any positive hits, then look for tentative hits
* based on the extension only.
*
* @param targetFile The binary file to be identified
*/
private void checkExtension(IByteReader targetFile)
{
//work out if file has an extension
bool hasExtension = true;
int dotPos = targetFile.GetFileName().LastIndexOf(".");
if (dotPos < 0)
{
hasExtension = false;
}
else if (dotPos == targetFile.GetFileName().Length - 1)
{
hasExtension = false;
}
else if (targetFile.GetFileName().LastIndexOf("/") > dotPos)
{
hasExtension = false;
}
else if (targetFile.GetFileName().LastIndexOf("\\") > dotPos)
{
hasExtension = false;
}
//
if (hasExtension)
{
String fileExtension = targetFile.GetFileName().Substring(dotPos + 1);
if (targetFile.GetNumberOfHits() > 0)
{
//for each file format which is a hit, check that it expects the given extension - if not give a warning
for (int iHit = 0; iHit < targetFile.GetNumberOfHits(); iHit++)
{
if (!(targetFile.GetHit(iHit).GetFileFormat().HasMatchingExtension(fileExtension)))
{
targetFile.GetHit(iHit).SetIdentificationWarning(MessageDisplay.FILEEXTENSIONWARNING);
}
} //loop through hits
}
else
{
//no positive hits have been found, so search for tenative hits
//loop through all file formats with no internal signature
for (int iFormat = 0; iFormat < this.getNumFileFormats(); iFormat++)
{
if (this.getFileFormat(iFormat).GetNumberOfInternalSignatures() == 0)
{
if (this.getFileFormat(iFormat).HasMatchingExtension(fileExtension))
{
//add this as a tentative hit
FileFormatHit fileHit = new FileFormatHit(this.getFileFormat(iFormat), AnalysisController.HIT_TYPE_TENTATIVE, false, "");
targetFile.AddHit(fileHit);
targetFile.SetTentativeIdentification();
}
}
} //loop through file formats
}
} //end of if(hasExtension)
else
{
//if the file does not have an extension then add warning to all its hits
for (int iHit = 0; iHit < targetFile.GetNumberOfHits(); iHit++)
{
targetFile.GetHit(iHit).SetIdentificationWarning(MessageDisplay.FILEEXTENSIONWARNING);
}
}
}
/**
* Add another hit to the list of hits for this file.
* @param theHit The <code>FileFormatHit</code> to be added
*/
public void AddHit(FileFormatHit theHit)
{
this.myIDFile.addHit(theHit);
}
