Re: [PATCH] KEYS: trusted: allow module init if TPM is inactive or deactivated

From: Mimi Zohar
Date: Sat Aug 03 2019 - 21:50:54 EST

On Sat, 2019-08-03 at 17:44 +0300, Jarkko Sakkinen wrote:
> On Fri, 2019-08-02 at 15:23 -0500, Tyler Hicks wrote:
> > That wasn't the conclusion that I came to. I prefer Robert's proposed
> > change to trusted.ko.
> >
> > How do you propose that this be fixed in eCryptfs?
> >
> > Removing encrypted_key support from eCryptfs is the only way that I can
> > see to fix the bug in eCryptfs. That support has been there since 2011.
> > I'm not sure of the number of users that would be broken by removing
> > encrypted_key support. I don't think the number is high but I can't say
> > that confidently.
> Looking at the documentation [1] it is stated that
> "Encrypted keys do not depend on a TPM, and are faster, as they use AES
> for encryption/decryption."
> Why would you need to remove support for encrypted keys? Isn't it a
> regression in encrypted keys to hard depend on trusted keys given
> what the documentation says?

"Encrypted" key are symmetric keys, which are encrypted/decrypted
either by a "trusted" key or, for development purposes only, a "user"