Sunday, December 28, 2025

Re: Using 'a' vs. using 'c' in vnconfig

On Sun, Dec 28, 2025 at 05:04:23PM -0700, max77@openmail.cc wrote:
> Does anyone know whether there any way to attempt to recover a
> vnconfig encrypted filesystem if the primary superblock is broken due
> to having used 'c' instead of creating 'a' using disklabel?

The encryption is just blowfish CBC, so the fact that it's encrypted doesn't
really complicate the situation beyond a standard filesystem recovery effort,
(as long as you have the key and any salt file, which presumably you do in
this case).

I wrote a utility some time ago to convert vnd volumes between encrypted and
unencrypted, and to change the encryption parameters.

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