Cryptographic Functions for Office Visual Basic files.
Use the package manager pip to install MS_OVBA_Compression.
pip install ms_ovba_cryptoMicrosoft VBA files use a custom encryption algorithm to obfuscate visibility and permission fields. The clsid is used as a seed.
import ms_ovba_crypto
data = b'\x00\x00\x00\x00',
clsid = '{9E394C0B-697E-4AEE-9FA6-446F51FB30DC}'
# Random numbers are used in the obfuscation, so the output is not deterministic.
encrypted = ms_ovba_crypto.encrypt(clsid, data)
data = b'\x41\x43\x5A\x5A\x5E\x5A\x5E\x5A\x5E\x5A\x5E'
# returns b'\x00\x00\x00\x00'
ms_ovba_crypto.decrypt(data)Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.
Please make sure to update tests as appropriate.