prevent the empty string as password
authorPhilipp Gesang <philipp.gesang@intra2net.com>
Fri, 31 Mar 2017 13:56:11 +0000 (15:56 +0200)
committerThomas Jarosch <thomas.jarosch@intra2net.com>
Mon, 2 Apr 2018 11:34:08 +0000 (13:34 +0200)
commit2be3c27957041a88931200028b8c470d6153f547
tree3310470569e7802b45b8149566e1d567fa32743e
parentec96293d89234218f646830c686b443d483a101c
prevent the empty string as password

backup.py would default to using the empty string as password
which would cause a crypto context to be created even without
encryption being required.

Use ``None`` instead to indicate absence of a user-supplied
password.
backup.py
deltatar/crypto.py