Re: [tpmdd-devel] [PATCH 2/2] keys, trusted: seal with a policy
From: Jarkko Sakkinen
Date: Fri Nov 20 2015 - 09:53:22 EST
On Thu, Nov 19, 2015 at 10:59:57AM +0000, Fuchs, Andreas wrote:
> > ________________________________________
> > From: Jarkko Sakkinen [jarkko.sakkinen@xxxxxxxxxxxxxxx]
> > Sent: Tuesday, November 17, 2015 17:27
> > Support for sealing with a authorization policy.
> > Two new options for trusted keys:
> > * 'policydigest=': provide an auth policy digest for sealing.
> > * 'policyhandle=': provide a policy session handle for unsealing.
> Hi Jarkko,
> just out of curiosity; when testing this, how did you calculate the blobauth parameter ?
> Since its calculation requires the cpHash for the unseal()-command...
> If you "predict" the cpHash in userSpace, this would mean that userspace needs to know the
> kernels way of constructing the unseal()-command to the TPM, which in turn would make
> this part of the ABI and require documentation before upstreaming, imho.
Is this a comment about the patch? Have you actually read the source
code or where is this coming from? Please read the source code.
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