linux-ext4 - e4crypt - Possible to Change Passphrase?

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Date:   Thu, 26 Oct 2017 23:20:16 +0000
From:   "Grochowalski, Matthew (GE Aviation, US)" 
        <MatthewS.Grochowalski@...com>
To:     "linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: e4crypt - Possible to Change Passphrase?

Is it possible to change the passphrase of a folder encrypted using e4crypt set_policy?

Looking through the documentation it appears the answer is no, but I haven't found anything that addresses that specifically.

I'm assuming I'd need to copy everything from one directory to another with a different policy then delete the originals, or generate some random data to use as a passphrase then encrypt that with the actual user passphrase?

Thanks,
--Matt Grochowalski