Decrypt VIM encrypted file in Python

Question

In my Python web app, I would need to decrypt a file that was encrypted using VIM. Assuming the web app knows the password used to encrypt the file in VIM, how do I write code to decrypt ?

Answer 1

Turns out that vim uses the same encryption as PKZIP:

from zipfile import _ZipDecrypter

fp = open(somefile, 'rb')
zd = _ZipDecrypter(somekey)

fp.read(12)
print ''.join(zd(c) for c in fp.read())

fp.close()