From: Eric Biggers <ebiggers@google.com>
To: Anand Jain <anand.jain@oracle.com>
Cc: linux-fsdevel@vger.kernel.org, Theodore Ts'o <tytso@mit.edu>,
Joe Richey <joerichey@google.com>
Subject: Re: fs/crypt : passphrase recycle without data re-encrypt
Date: Mon, 6 Feb 2017 10:02:51 -0800 [thread overview]
Message-ID: <20170206180251.GA97070@google.com> (raw)
In-Reply-To: <9c1ca009-cb4a-69c0-a8ba-da4b70812703@oracle.com>
Hi Anand,
On Mon, Feb 06, 2017 at 07:16:35PM +0800, Anand Jain wrote:
>
>
> (s/e2crypt/e4crypt, sorry)
> ---
>
> I am looking for some information on how its been planned to
> accommodate the feature such as passphrase recycle without the
> data re-encryption in fs/crypto or in e4crypt ? any idea ?
> Per fs/crypto and e4crypt (for the current master key derivation
> method) it appears to me that its not possible, unless I am
> missing something. ?
>
> Thanks, Anand
Indeed, this needs to be implemented by userspace, but e4crypt doesn't support
it yet. I've Cc'ed Joe Richey; he's currently working on a userspace program
called 'fscrypt' that will support this feature. There's also a design document
at https://goo.gl/55cCrI you could take a look at.
Eric
next prev parent reply other threads:[~2017-02-06 18:02 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-06 11:00 fs/crypt : passphrase recycle without data re-encrypt Anand Jain
2017-02-06 11:16 ` Anand Jain
2017-02-06 18:02 ` Eric Biggers [this message]
2017-02-06 22:43 ` Anand Jain
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