linux-kernel - [PATCH v6 0/5] Enable root to update the blacklist keyring

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210210120410.471693-1-mic@digikod.net>
Date:   Wed, 10 Feb 2021 13:04:05 +0100
From:   Mickaël Salaün <mic@...ikod.net>
To:     David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Jarkko Sakkinen <jarkko@...nel.org>
Cc:     Mickaël Salaün <mic@...ikod.net>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Snowberg <eric.snowberg@...cle.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        James Morris <jmorris@...ei.org>,
        Mickaël Salaün <mic@...ux.microsoft.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        "Serge E . Hallyn" <serge@...lyn.com>,
        Tyler Hicks <tyhicks@...ux.microsoft.com>,
        keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-integrity@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-security-module@...r.kernel.org
Subject: [PATCH v6 0/5] Enable root to update the blacklist keyring

This new patch series is a rebase on David Howells's keys-misc branch.
This mainly fixes UEFI DBX and the new Eric Snowberg's feature to import
asymmetric keys to the blacklist keyring.
I successfully tested this patch series with the 186 entries from
https://uefi.org/sites/default/files/resources/dbxupdate_x64.bin (184
binary hashes and 2 certificates).

The goal of these patches is to add a new configuration option to enable the
root user to load signed keys in the blacklist keyring.  This keyring is useful
to "untrust" certificates or files.  Enabling to safely update this keyring
without recompiling the kernel makes it more usable.

This can be applied on top of David Howells's keys-next branch:
https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=keys-next
Git commits can be found in https://github.com/l0kod/linux branch
dyn-auth-blacklist-v6 commit fcf976b74ffcd4551683e6b70dbf5fb102cf9906 .

Previous patch series:
https://lore.kernel.org/lkml/20210128191705.3568820-1-mic@digikod.net/

Regards,

Mickaël Salaün (5):
  tools/certs: Add print-cert-tbs-hash.sh
  certs: Check that builtin blacklist hashes are valid
  certs: Make blacklist_vet_description() more strict
  certs: Factor out the blacklist hash creation
  certs: Allow root user to append signed hashes to the blacklist
    keyring

 MAINTAINERS                                   |   2 +
 certs/.gitignore                              |   1 +
 certs/Kconfig                                 |  17 +-
 certs/Makefile                                |  17 +-
 certs/blacklist.c                             | 218 ++++++++++++++----
 crypto/asymmetric_keys/x509_public_key.c      |   3 +-
 include/keys/system_keyring.h                 |  14 +-
 scripts/check-blacklist-hashes.awk            |  37 +++
 .../platform_certs/keyring_handler.c          |  26 +--
 tools/certs/print-cert-tbs-hash.sh            |  91 ++++++++
 10 files changed, 346 insertions(+), 80 deletions(-)
 create mode 100755 scripts/check-blacklist-hashes.awk
 create mode 100755 tools/certs/print-cert-tbs-hash.sh


base-commit: 5bcd72358a7d7794ade0452ed12919b8c4d6ffc7
-- 
2.30.0