Re: [PATCH 0/8] MODSIGN: Use PKCS#7 for module signatures [ver #4]

[Mimi Zohar]

On Fri, 2015-05-22 at 08:48 +0100, David Howells wrote:
> Luis R. Rodriguez <mcgrof@xxxxxxxx> wrote:
> 
> > > This is similar to what i am doing right now - create CA hierarchy so we can 
> > > have something like:
> > > 
> > >                                +-> KeyB
> > >                                |
> > > RootCA --->  CertA ---> CertB ---> CertC ---> KeyC
> > >                     |
> > >                     +-> CertA' ---> KeyA"
> > 
> > How exactly do you go about uploading CertB to the kernel BTW?
> 
> Assuming RootCA or CertA is present in the kernel, the idea would be to use
> the add_key() system call or the request_key() mechanism to add the key to the
> system keyring.  The key in the cert would only be added to the keyring if it
> is trusted by a key already there.

>From Petko's description, the RootCA is on the system keyring, but CertA
is on a new IMA trusted CA keyring.   So everything you said is true,
but on this new, yet to be upstreamed, IMA trusted CA keyring.

Mimi

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