svenskithesource / pyspy

dnSpy but for Python

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• Reverse Engineering (especially in Python, send over any samples you have)
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pyspy's Issues

'NoneType' object is not iterable

Ok so i tried to edit some random .pyc that and i just changed 1 letter and when i export them i got this error, any fix?

used
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Traceback (most recent call last):
File "C:\Users[MyPc'sNamexD]\Desktop\pySpy\pyspy.py", line 31, in export
file.write(header + marshal.dumps(main_code.to_native()))
File "C:\Users[MyPc'sNamexD]\Desktop\pySpy\editor.py", line 112, in to_native
const = code[0].to_native()
File "C:\Users[MyPc'sNamexD]\Desktop\pySpy\editor.py", line 111, in to_native
code = [e for e in code_objects if str(const.uid) == str(e.uid)]
TypeError: 'NoneType' object is not iterable

TypeError: replace() takes at most 16 keyword arguments (18 given)

After exporting to pyc i seem to always trigger this error, even if i did not necessairily change anything

error

when I edit a file . pyc, after I save the file and execute it I get an error:
Fatal Python error: PyFrame_BlockPop: block stack underflow
Python runtime state: initialized

Current thread 0x00002df0 (most recent call first):
File "test.py", line 199 in

Extension modules: _brotli, _cffi_backend, cchardet._cchardet, lxml._elementpath, lxml.etree, numpy.core._multiarray_umath, numpy.core._multiarray_tests, numpy.linalg._umath_linalg, numpy.fft._pocketfft_internal, numpy.random._common, numpy.random.bit_generator, numpy.random._bounded_integers, numpy.random._mt19937, numpy.random.mtrand, numpy.random._philox, numpy.random._pcg64, numpy.random._sfc64, numpy.random._generator, PIL._imaging (total: 19)

ImportError: DLL load failed while importing _dearpygui: The specified module could not be found.

dearpygui doesn't work: ImportError: DLL load failed while importing _dearpygui: The specified module could not be found.

[BUG] Add const feature doesn't work as expect

There is currently two bugs with the current state of the code, the first one is present at:

pySpy/pyspy/pyspy.py

Lines 120 to 122 in 31bc912

	current_file.co_names = list(current_file.co_consts)
	current_file.co_consts.append(value)
	current_file.co_names = tuple(current_file.co_consts)

It's applying the co_consts value in the co_names property incorrectly.

The second bug is here:

pySpy/pyspy/pyspy.py

Lines 326 to 330 in 31bc912

	if not isinstance(value, types.CodeType) and not isinstance(value, editor.Code):
	with dpg.table_row():
	dpg.add_text(index)
	dpg.add_input_text(default_value=repr(value), tag=f"const_{index}", width=400,
	user_data="co_consts_apply", callback=apply_changes, on_enter=True)

Whenever there is a code object within the co_consts attribute, this object gets skipped, but the index does not remain the same, since it is coming from an enumerate function.

This results in a bug in the function that applies the changes that happened to the consts, since the index of the code object that was skipped, will return None.

pySpy/pyspy/pyspy.py

Lines 65 to 71 in 31bc912

	while True:
	value = dpg.get_value(f"const_{i}")
	if value is None:
	break
	new_consts.append(ast.literal_eval(value))
	i += 1

The "ideal" solution would be having a custom counter, but this would result on yet another bug, if we look closely at the code mentioned above, we can see that it updates the co_consts based on the list that is saved at the Dear PyGui internals. But if we skip the code while adding and displaying it, the code will never be there, which would cause every code object to be lost from the co_consts list.

We need to find a way to display the code objects but do not allow the user to modify it on the const view, and then get this code objects while saving the new co_const list, since simply calling ast.literal_eval wouldn't work in this scenario.

Add Export as .py

Is it possible to export the decompiled pyc to py?
Thank you.