From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: Jiri Slaby <jslaby@suse.cz>, David Howells <dhowells@redhat.com>,
keyrings@vger.kernel.org
Cc: matthew.garrett@nebula.com,
linux-security-module@vger.kernel.org, linux-efi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/9] KEYS: Blacklisting & UEFI database load
Date: Wed, 07 Mar 2018 08:18:02 -0500 [thread overview]
Message-ID: <1520428682.10396.445.camel@linux.vnet.ibm.com> (raw)
In-Reply-To: <6eabbb43-295e-9ba0-c0d9-120f48aa0e1d@suse.cz>
On Tue, 2018-03-06 at 15:05 +0100, Jiri Slaby wrote:
> On 11/16/2016, 07:10 PM, David Howells wrote:
> > Here are two sets of patches. Firstly, the first three patches provide a
> > blacklist, making the following changes:
> ...
> > Secondly, the remaining patches allow the UEFI database to be used to load
> > the system keyrings:
> ...
> > Dave Howells (2):
> > efi: Add EFI signature data types
> > efi: Add an EFI signature blob parser
> >
> > David Howells (5):
> > KEYS: Add a system blacklist keyring
> > X.509: Allow X.509 certs to be blacklisted
> > PKCS#7: Handle blacklisted certificates
> > KEYS: Allow unrestricted boot-time addition of keys to secondary keyring
> > efi: Add SHIM and image security database GUID definitions
> >
> > Josh Boyer (2):
> > MODSIGN: Import certificates from UEFI Secure Boot
> > MODSIGN: Allow the "db" UEFI variable to be suppressed
>
> Hi,
>
> what's the status of this please? Distributors (I checked SUSE, RedHat
> and Ubuntu) have to carry these patches and every of them have to
> forward-port the patches to new kernels. So are you going to resend the
> PR to have this merged?
With secure boot enabled, we establish a signature chain of trust,
rooted in HW, up to the kernel and then transition from those keys to
a new set of keys builtin the kernel and loaded onto the
builtin_trusted_keys (builtin).
Enabling the secondary_builtin_keys (secondary) allows keys signed by
a key on the builtin keyring to be added to the secondary keyring.
Any key, signed by a key on either the builtin or secondary keyring,
can be added to the IMA trusted keyring.
The "KEYS: Allow unrestricted boot-time addition of keys to secondary
keyring" patch loads the platform keys directly onto the secondary
keyring, without requiring them to be signed by a key on the builtin
or secondary keyring. With this change, any key signed by a platfrom
key on the secondary, can be loaded onto the .ima trusted keyring.
Just because I trust the platform keys prior to booting the kernel,
doesn't mean that I *want* to trust those keys once booted. There
are, however, places where we need access to those keys to verify a
signature (eg. kexec kernel image).
Nayna Jain's "certs: define a trusted platform keyring" patch set
introduces a new, separate keyring for these platform keys.
Mimi
next prev parent reply other threads:[~2018-03-07 13:18 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-16 18:10 [PATCH 0/9] KEYS: Blacklisting & UEFI database load David Howells
2016-11-16 18:10 ` [PATCH 1/9] KEYS: Add a system blacklist keyring David Howells
2016-11-16 18:10 ` [PATCH 2/9] X.509: Allow X.509 certs to be blacklisted David Howells
2016-11-16 18:11 ` [PATCH 3/9] PKCS#7: Handle blacklisted certificates David Howells
2016-11-16 18:11 ` [PATCH 4/9] KEYS: Allow unrestricted boot-time addition of keys to secondary keyring David Howells
2016-11-17 6:41 ` Petko Manolov
2016-11-17 9:56 ` David Howells
2016-11-17 10:22 ` Petko Manolov
2016-11-17 11:18 ` David Howells
2016-11-21 14:04 ` Mimi Zohar
2016-11-21 15:17 ` David Howells
2016-11-21 16:24 ` Mimi Zohar
2016-11-16 18:11 ` [PATCH 5/9] efi: Add SHIM and image security database GUID definitions David Howells
2016-11-21 16:07 ` Ard Biesheuvel
2016-11-16 18:11 ` [PATCH 6/9] efi: Add EFI signature data types David Howells
2016-11-16 23:43 ` Mat Martineau
2016-11-17 9:44 ` David Howells
2016-11-21 16:08 ` Ard Biesheuvel
2016-11-16 18:11 ` [PATCH 7/9] efi: Add an EFI signature blob parser David Howells
2016-11-16 18:11 ` [PATCH 8/9] MODSIGN: Import certificates from UEFI Secure Boot David Howells
2016-11-21 16:16 ` Ard Biesheuvel
2016-11-21 16:25 ` Josh Boyer
2016-11-24 19:22 ` James Bottomley
2016-11-24 19:17 ` James Bottomley
2016-12-02 18:57 ` James Bottomley
2016-12-02 20:18 ` Mimi Zohar
2016-11-16 18:11 ` [PATCH 9/9] MODSIGN: Allow the "db" UEFI variable to be suppressed David Howells
2016-11-21 16:18 ` Ard Biesheuvel
2016-11-21 16:26 ` Josh Boyer
2016-11-21 16:42 ` Ard Biesheuvel
2016-11-21 19:05 ` Peter Jones
2016-11-21 19:06 ` Ard Biesheuvel
2016-11-21 19:18 ` Peter Jones
2016-11-21 19:33 ` Ard Biesheuvel
2018-03-06 14:05 ` [PATCH 0/9] KEYS: Blacklisting & UEFI database load Jiri Slaby
2018-03-07 13:18 ` Mimi Zohar [this message]
2018-03-07 15:28 ` James Bottomley
2018-03-11 3:20 ` joeyli
2018-03-19 14:12 ` Mimi Zohar
2018-03-27 11:08 ` joeyli
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