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Add support to extract offsets of embedded files in case someone needs it. #14

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Add support to extract offsets of embedded files in case someone needs it. #14

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8333fc9
Added support for extracting offsets of embedded files
opswat-roland-gyorffi Mar 10, 2023
a74017a
Extended Main.py with the new offset element
opswat-roland-gyorffi Mar 10, 2023
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4 changes: 3 additions & 1 deletion pyOneNote/FileNode.py
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Original file line number Diff line number Diff line change
Expand Up @@ -544,7 +544,9 @@ def __str__(self):

class FileDataStoreObject:
def __init__(self, file, fileNodeChunkReference):
self.guidHeader, self.cbLength, self.unused, self.reserved = struct.unpack('<16sQ4s8s', file.read(36))
size_of_header = 36
self.guidHeader, self.cbLength, self.unused, self.reserved = struct.unpack('<16sQ4s8s', file.read(size_of_header))
self.FileOffset = fileNodeChunkReference.stp + size_of_header
self.FileData, = struct.unpack('{}s'.format(self.cbLength), file.read(self.cbLength))
file.seek(fileNodeChunkReference.stp + fileNodeChunkReference.cb - 16)
self.guidFooter, = struct.unpack('16s', file.read(16))
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1 change: 1 addition & 0 deletions pyOneNote/Main.py
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Expand Up @@ -55,6 +55,7 @@ def process_onenote_file(file, output_dir, extension, json_output):
for name, file in data['files'].items():
print('{}{} ({}):'.format(indent, name, file['identity']))
print('\t{}Extension: {}'.format(indent, file['extension']))
print('\t{}At offset: {} ({} bytes)'.format(indent, file['offset'], len(file['content'])))
if(file['identity'] in file_metadata):
for property_name, property_val in file_metadata[file['identity']].items():
print('{}{}: {}'.format(indent+'\t', property_name, str(property_val)))
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6 changes: 4 additions & 2 deletions pyOneNote/OneDocument.py
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Original file line number Diff line number Diff line change
Expand Up @@ -51,13 +51,14 @@ def get_files(self):
if hasattr(node, "data") and node.data:
if isinstance(node.data, FileDataStoreObjectReferenceFND):
if not str(node.data.guidReference) in self._files:
self._files[str(node.data.guidReference)] = {"extension": "", "content": "", "identity": ""}
self._files[str(node.data.guidReference)] = {"extension": "", "content": "", "identity": "", "offset": 0}
self._files[str(node.data.guidReference)]["content"] = node.data.fileDataStoreObject.FileData
self._files[str(node.data.guidReference)]["offset"] = node.data.fileDataStoreObject.FileOffset
elif isinstance(node.data, ObjectDeclarationFileData3RefCountFND):
guid = node.data.FileDataReference.StringData.replace("<ifndf>{", "").replace("}", "")
guid = guid.lower()
if not guid in self._files:
self._files[guid] = {"extension": "", "content": "", "identity": ""}
self._files[guid] = {"extension": "", "content": "", "identity": "", "offset": 0}
self._files[guid]["extension"] = node.data.Extension.StringData
self._files[guid]["identity"] = str(node.data.oid)
return self._files
Expand All @@ -71,6 +72,7 @@ def get_json(self):
for key, file in self.get_files().items():
files_in_hex[key] = {'extension': file['extension'],
'content': file['content'].hex(),
'offset': file['offset'],
'identity': file['identity']}

res = {
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