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 3B2FD3B8D75; Sat, 13 Dec 2025 20:32:33 +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=1765657954; cv=none; b=EDscINzlZZXyT5ZS7xwvue1dKQC4NAylhZzceW0XBmy1MiNRtYhto+bsFsXiikf5SQQc65G0SGMMFIaWAmnnb6fNAy1a1uUXmH+1P/vt/db1Bo/18+4SySVvO2rqGjtys6QExowITQxfDKayEu6R+xDhbI9bYzb4kngdYIIjzgI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765657954; c=relaxed/simple; bh=6wGdvHLxntMErasleA4cfnTVhcRhIIh86AzeOeaJkpY=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=qpqwUXyuiowixD/3bRqfSdENwCne2Mf9UK1jh4wSD750jEtRMzcrzXxoUHSHAbwZnDoocTtY3K/DEpBauBILOgKDkseb4d24a3oWIS+/iVQRnXT+X+PfsBxoSV20Jsbn7SGNzFBvLlDlYq+7dBLMkoayUMMJy1FuEzk1Sy+w9dw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sM50s8NL; 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="sM50s8NL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48A75C4CEF7; Sat, 13 Dec 2025 20:32:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1765657953; bh=6wGdvHLxntMErasleA4cfnTVhcRhIIh86AzeOeaJkpY=; h=From:To:Cc:Subject:Date:From; b=sM50s8NL8PLOjro2Rq/fjoqOC6Z5rq1DRUrfNa5zHqz30AdPksqqymyMzj1zOHd0N ehK6/emIR/S6EF8wouGURpmJX4VDVK+wN+PvCfF5KTIFcTB6qMqVj7TImjpVY1BrS6 9+mITA5DaELrS3lnXce9xgzUenO5Uu+NkaVcZIfpA3ReFE5aIW9crqPiUmfFeY9+lW xQqxliY3y9WfzcYffQNVs/VU54xvUiN08CtzCKbXWUfRj1y9os/qzbd/hJTxPN+d8k DSvZfRfjEdKhbZAca+IGCq703oh0D/JUT1xKN2Pm8pM5VGltXhiWujaquoVCdeJXeo WbIvAeADW1Rfw== From: Jarkko Sakkinen To: linux-integrity@vger.kernel.org Cc: Ross Philipson , 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 v5 00/12] Streamline TPM2 HMAC sessions Date: Sat, 13 Dec 2025 22:32:07 +0200 Message-Id: <20251213203220.317498-1-jarkko@kernel.org> X-Mailer: git-send-email 2.39.5 Precedence: bulk X-Mailing-List: linux-integrity@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. Change Log ========== v5: - I decided to add the managed allocation patch to this and take it from the master branch for the time being, as it needs more eyes despite having already one reviewed-by tag (especially tested-by tags). Jarkko Sakkinen (12): KEYS: trusted: Open code tpm2_buf_append() KEYS: trusted: Remove dead branch from tpm2_unseal_cmd tpm2-sessions: Define TPM2_NAME_MAX_SIZE tpm-buf: Merge TPM_BUF_BOUNDARY_ERROR and TPM_BUF_OVERFLOW tpm-buf: Remove chip parameter from tpm_buf_append_handle tpm-buf: Implement managed allocations 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 | 154 ++++----- drivers/char/tpm/tpm-chip.c | 2 +- drivers/char/tpm/tpm-interface.c | 177 ++++++++++- drivers/char/tpm/tpm-sysfs.c | 23 +- drivers/char/tpm/tpm.h | 3 - drivers/char/tpm/tpm1-cmd.c | 198 ++++-------- drivers/char/tpm/tpm2-cmd.c | 371 +++++++--------------- drivers/char/tpm/tpm2-sessions.c | 272 ++++++---------- drivers/char/tpm/tpm2-space.c | 44 ++- drivers/char/tpm/tpm_vtpm_proxy.c | 30 +- include/linux/tpm.h | 79 +++-- security/keys/trusted-keys/trusted_tpm1.c | 44 +-- security/keys/trusted-keys/trusted_tpm2.c | 341 ++++++++++---------- 13 files changed, 802 insertions(+), 936 deletions(-) -- 2.39.5