lkml.org 
[lkml]   [2018]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 00/22] KEYS: Support TPM-wrapped key and crypto ops
From
Date
On Thu, 2018-09-20 at 09:26 +0200, Marcel Holtmann wrote:
> Hi David,
>
> > > > Yes. It shouldn't be much code, either. You still have to check for X.509
> > > > DER since the kernel currently supports that.
> > >
> > > For reasons of backward compatibility, correct? The kernel also has
> > > mscode.asn1 which we would need to support as well. Since we can't break
> > > compatibility then perhaps this doesn't buy us a whole lot in the end.
> >
> > Don't worry about mscode - that's not an asymmetric key parser. That's only
> > ever used directly from verify_pefile_signature().
> >
> > Currently, we have to retain support for DER-encoded X.509.
> >
> > But there's no reason we can't have a PEM parser that decodes the PEM and
> > selects X.509, PKCS#8 or TPM based on the ascii header in that. PKCS#8 and
> > TPM don't need to take DER directly.
>
> since we have to support DER-encoded anyway, can we get the current
> patches merged (with fixes to the commit messages for the openssl
> examples if needed) and then work on PEM support inside the kernel.
> For me these seems to be two independent features. And in the current
> form the patches have been tested and used.
>
> Or let me ask this differently, are there any objections to merging
> these patches with just DER support?

Let me rephrase that question slightly: Are we happy to have to make
inferences from the ASN.1 structure, and in particular that a bare
OCTET-STRING is a TPMv1 blob? I believe James ended up doing something
somewhat more sensible for the TPMv2 blob so that might end up being
OK...?

[unhandled content-type:application/x-pkcs7-signature]
\
 
 \ /
  Last update: 2018-09-20 18:46    [W:0.909 / U:0.288 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site