From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4BE77324B3B; Wed, 10 Dec 2025 17:20:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765387235; cv=none; b=TAJ+P+2kCv8zH0WMuBEWL7Ihn51b+cd3tgzMbBZgzmD0L/uyzVXQ71ZI7j2Dc3CI9gsFXYjnW4C5L/Auv2qeAIu9wDfwdDzMwRGnEPVq1SwVU/eV8rzQcH/6AhxwybVZXBcsFQXS8LjB1/RWohFY8uByeAPLch3Bu0S5Fih5BsA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765387235; c=relaxed/simple; bh=Qta2pvazNSRhM3J0IVWqC87nI/Docta+z1wOPTm5o/Q=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=M9kV1YoWI9BQ8zuDN/mI92W0Z3lrXFTHz0mXbfP1UM357x5JLTA7K11nAR2HIZrpSVa39VU947OodsMLTT+g/j2ya3qnbIoMBUAsLsSvumL1OCCQYzjIjYQMB8Oza8VrNnLoEMxcAgQtrBT214vbe36VI7DYozXprW0qnoh41DI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=PkWqXsHN; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="PkWqXsHN" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43119C4CEF1; Wed, 10 Dec 2025 17:20:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765387234; bh=Qta2pvazNSRhM3J0IVWqC87nI/Docta+z1wOPTm5o/Q=; h=From:To:Cc:Subject:Date:From; b=PkWqXsHNV5TSxPTGVmk09F2zHPJ2Sypi1DZ0X3qCS0L6wiZVCT2+ZpymsiZtkXlOJ dEsfrzp/tarY5EHBQp45Ngm3pMFqN7IgTFbQCIxlIULE+O8Sw7K+mH8zGRvLO4YXnG NEVF/P63EIsc58x4WgduzubW9e4RH3NJpelvngRSELyqMyglo6mvP8pYzEhyEvzGb4 KAi+TAiC4CdTs/pXOO2g9TGG4M2iUICD+1YfldV2XIc5J7/PCqrVOpuWDYsL6hAKws b4VVOBDVGy7kKwcxt3RXT76BjC1+MetAfmNvcJrSc4KTgldaM+rrRxmi9YIr8ugyts LGQXuKSzEAAXQ== From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: Jarkko Sakkinen , David Howells , Paul Moore , James Morris , "Serge E. Hallyn" , keyrings@vger.kernel.org (open list:KEYS/KEYRINGS), linux-security-module@vger.kernel.org (open list:SECURITY SUBSYSTEM), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 0/8] Streamline TPM2 HMAC sessions Date: Wed, 10 Dec 2025 19:20:18 +0200 Message-Id: <20251210172027.109938-1-jarkko@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: keyrings@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 (8): KEYS: trusted: Remove dead branch from tpm2_unseal_cmd 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 tpm: Orchestrate TPM commands in tpm_get_random() tpm: Send only one at most TPM2_GetRandom command tpm: In tpm_get_random() replace 'retries' with a zero check drivers/char/tpm/tpm-buf.c | 25 --- drivers/char/tpm/tpm-chip.c | 2 +- drivers/char/tpm/tpm-interface.c | 177 ++++++++++++++++++++-- drivers/char/tpm/tpm-sysfs.c | 2 +- drivers/char/tpm/tpm.h | 2 - drivers/char/tpm/tpm1-cmd.c | 62 -------- drivers/char/tpm/tpm2-cmd.c | 102 +------------ drivers/char/tpm/tpm2-sessions.c | 130 +++++----------- include/linux/tpm.h | 51 +++++-- security/keys/trusted-keys/trusted_tpm1.c | 8 +- security/keys/trusted-keys/trusted_tpm2.c | 134 +++++++++------- 11 files changed, 325 insertions(+), 370 deletions(-) -- 2.39.5