linux-kernel - Re: [PATCH 00/22] KEYS: Support TPM-wrapped key and crypto ops

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Date:   Tue, 18 Sep 2018 17:17:10 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Denis Kenzior <denkenz@...il.com>,
        David Howells <dhowells@...hat.com>
Cc:     jmorris@...ei.org, keyrings@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/22] KEYS: Support TPM-wrapped key and crypto ops

On Tue, 2018-09-18 at 00:24 -0500, Denis Kenzior wrote:
> Hi David,
> 
> On 09/18/2018 10:50 AM, David Howells wrote:
> > Denis Kenzior <denkenz@...il.com> wrote:
> > 
> > >     openssl asn1parse -inform pem -in /tmp/privkey.2048.tpm -noout \
> > >                       -out /tmp/privkey.2048.der
> > 
> > You can use "... -out - | ..." instead.
> 
> Aha! okay, that is even more elegant.  Your openssl-fu is better than 
> mine :)

'grep -v ^----- | base64 -d' also works most of the time :)

You are passing the raw DER to the kernel in both cases, right? And the
kernel just happens to know that if it receives a bare OCTET-STRING
it's supposed to treat it as a TPMv1.2 key? 
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