linux-kernel - [PATCH v3 0/4] Certificate insertion support for x86 bzImages

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Date:   Mon, 21 Nov 2016 23:19:50 -0500
From:   Mehmet Kayaalp <mkayaalp@...ux.vnet.ibm.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Mehmet Kayaalp <mkayaalp@...ux.vnet.ibm.com>,
        Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        Stefan Berger <stefanb@...ux.vnet.ibm.com>,
        George Wilson <gcwilson@...ibm.com>,
        LSM <linux-security-module@...r.kernel.org>,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/4] Certificate insertion support for x86 bzImages

These patches add support for modifying the reserved space for extra
certificates in a compressed bzImage in x86. This allows separating the
system keyring certificate from the kernel build process. After the kernel
image is distributed, the insert-sys-cert script can be used to insert the
certificate for x86.

(Sorry for the previous cover I sent without the subject line.)

Changes:

v3:
* Rewrote 1/4 to insert incompressible bytes are at build time. Previous
solution required changes to <arch>/boot/Makefile's for modifying the
vmlinux file after linking, and did not work well with cross compilation.
* Added 2/4 for ELF class-independent processing of vmlinux file, in case the
script was compiled for 64-bit and the kernel was compiled for 32-bit.
* Reordered 3/4, added x86 bzImage boot version (>=2.08) verification.

v2:
* Rebased arch/boot/x86/Makefile patch (removed in v3)

Mehmet Kayaalp (4):
  KEYS: Insert incompressible bytes to reserve space in bzImage
  KEYS: Add ELF class-independent certificate insertion support
  KEYS: Support for inserting a certificate into x86 bzImage
  KEYS: Print insert-sys-cert information to stdout instead of stderr

 certs/Makefile              |  21 +-
 certs/system_certificates.S |   2 +-
 scripts/Makefile            |   1 +
 scripts/insert-sys-cert.c   | 455 +++++++++++++++++++++++++++++++++-----------
 4 files changed, 362 insertions(+), 117 deletions(-)

-- 
2.7.4