Password for backup encryption

[lotigara]

Surely, the 32 char-only restriction for passwords is strange. Most users use passwords with length under 10 chars, so one would suffer from this limit.
The suggested change is to allow passwords from 8 to 32 (or even 64) chars.

[maelchiotti]

The encryption library requires a 32 characters passphrase (I don't exactly know why, but some cryptographic stuff). I could however pad a shorter password with a known character like "*".