linux-kernel - Re: [RFC PATCH] X.509: Don't check the signature on apparently self-signed keys [ver #2]

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Message-ID: <20160106170008.GF4603@localhost>
Date:	Wed, 6 Jan 2016 19:00:08 +0200
From:	Petko Manolov <petkan@...-labs.com>
To:	David Howells <dhowells@...hat.com>
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>, dwmw2@...radead.org,
	David Woodhouse <David.Woodhouse@...el.com>,
	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org, keyrings@...r.kernel.org
Subject: Re: [RFC PATCH] X.509: Don't check the signature on apparently
 self-signed keys [ver #2]

On 16-01-06 13:21:27, David Howells wrote:
> Mimi Zohar <zohar@...ux.vnet.ibm.com> wrote:
> 
> > The x509_validate_trust() was originally added for IMA to ensure, on a 
> > secure boot system, a certificate chain of trust rooted in hardware. The IMA 
> > MOK keyring extends this certificate chain of trust to the running system.
> 
> The problem is that because 'trusted' is a boolean, a key in the IMA MOK 
> keyring will permit addition to the system keyring.

If this is true the i am clearly doing the wrong thing.  The CA hierarchy should 
run top-bottom, not the other way around.

IMA MOK was introduced mainly because .system keyring was static at the time.  
Assuming i have my root certificate in .system how can i add more keys to this 
keyring?  The new keys have been signed by my root CA?  Is this possible since 
your October patch-set or i've been missing something this whole time?


		Petko
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