linux-kernel - [PATCH 0/4] Streamline TPM2 HMAC sessions

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: <20251209073903.767518-1-jarkko@kernel.org>
Date: Tue,  9 Dec 2025 09:38:58 +0200
From: Jarkko Sakkinen <jarkko@...nel.org>
To: linux-integrity@...r.kernel.org
Cc: Jarkko Sakkinen <jarkko@...nel.org>,
	Peter Huewe <peterhuewe@....de>,
	Jason Gunthorpe <jgg@...pe.ca>,
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 0/4] Streamline TPM2 HMAC sessions

Since we cannot at this point cache names of the keys given limitations
of the ASN.1 file format, I'll start a fresh patch set. Let's fixup what
we can right now.

This patch set addresses two major issues in the feature:

1. Dynamic resolution without gain. All kernel sites have at most single
   handle to authorize. Even if this changes some day this is how it is
   as of today and we definitely do not want to dictate the future but
   instead downscale code to the metrics that we have as of today.
2. Eliminate at least one unnnecessary tpm2_read_public() call.

Jarkko Sakkinen (4):
  tpm2-sessions: Define TPM2_NAME_MAX_SIZE
  KEYS: trusted: Re-orchestrate tpm2_read_public() calls
  tpm2-sessions: Remove AUTH_MAX_NAMES
  tpm-buf: Remove tpm_buf_append_handle

 drivers/char/tpm/tpm-buf.c                |  25 -----
 drivers/char/tpm/tpm2-cmd.c               |   7 +-
 drivers/char/tpm/tpm2-sessions.c          | 120 +++++++--------------
 include/linux/tpm.h                       |  20 +++-
 security/keys/trusted-keys/trusted_tpm2.c | 126 ++++++++++++++--------
 5 files changed, 138 insertions(+), 160 deletions(-)

-- 
2.52.0