linux-kernel - [PATCH 0/4] ima: support fs-verity signatures stored as

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Message-Id: <20211129170057.243127-1-zohar@linux.ibm.com>
Date:   Mon, 29 Nov 2021 12:00:53 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     linux-integrity@...r.kernel.org
Cc:     linux-fscrypt@...r.kernel.org, linux-kernel@...r.kernel.org,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 0/4] ima: support fs-verity signatures stored as

Support for fs-verity file digests in IMA was discussed from the beginning,
prior to fs-verity being upstreamed[1,2].  This patch set adds signature
verification support based on the fs-verity file digest.  Both the
file digest and the signature must be included in the IMA measurement list
in order to disambiguate the type of file digest.

[1] https://events19.linuxfoundation.org/wp-content/uploads/2017/11/fs-verify_Mike-Halcrow_Eric-Biggers.pdf
[2] Documentation/filesystems/fsverity.rst

Mimi Zohar (4):
  fs-verity: define a function to return the integrity protected file
    digest
  ima: define a new signature type named IMA_VERITY_DIGSIG
  ima: limit including fs-verity's file digest in measurement list
  ima: support fs-verity file digest based signatures

 fs/verity/fsverity_private.h              |  6 ---
 fs/verity/measure.c                       | 49 +++++++++++++++++++++++
 include/linux/fsverity.h                  | 17 ++++++++
 security/integrity/ima/ima.h              |  3 +-
 security/integrity/ima/ima_api.c          | 23 ++++++++++-
 security/integrity/ima/ima_appraise.c     |  9 ++++-
 security/integrity/ima/ima_main.c         |  7 +++-
 security/integrity/ima/ima_template_lib.c |  3 +-
 security/integrity/integrity.h            |  1 +
 9 files changed, 107 insertions(+), 11 deletions(-)

-- 
2.27.0