linux-kernel - [PATCH 0/2] tpm: HMAC fix and cleanup

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Message-ID: <20250731215255.113897-1-ebiggers@kernel.org>
Date: Thu, 31 Jul 2025 14:52:53 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: Peter Huewe <peterhuewe@....de>,
	Jarkko Sakkinen <jarkko@...nel.org>,
	linux-integrity@...r.kernel.org
Cc: Jason Gunthorpe <jgg@...pe.ca>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	linux-crypto@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Eric Biggers <ebiggers@...nel.org>
Subject: [PATCH 0/2] tpm: HMAC fix and cleanup

Patch 1 fixes the HMAC comparison in the tpm driver to be constant-time.

Patch 2 simplifies the HMAC computation in the tpm driver by using the
library API instead of an open-coded HMAC implementation.  Note that
this depends on the HMAC library API that was merged for v6.17-rc1.

Eric Biggers (2):
  tpm: Compare HMAC values in constant time
  tpm: Use HMAC-SHA256 library instead of open-coded HMAC

 drivers/char/tpm/Kconfig         |   1 +
 drivers/char/tpm/tpm2-sessions.c | 104 +++++++++----------------------
 2 files changed, 31 insertions(+), 74 deletions(-)


base-commit: d6084bb815c453de27af8071a23163a711586a6c
-- 
2.50.1