From patchwork Sun Jan 22 23:44:30 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 9531539 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 020CF601D4 for ; Sun, 22 Jan 2017 23:45:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EB4C627F07 for ; Sun, 22 Jan 2017 23:45:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DEE5A27F85; Sun, 22 Jan 2017 23:45:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EAEC327F07 for ; Sun, 22 Jan 2017 23:45:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750831AbdAVXo4 (ORCPT ); Sun, 22 Jan 2017 18:44:56 -0500 Received: from mga11.intel.com ([192.55.52.93]:13535 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750703AbdAVXox (ORCPT ); Sun, 22 Jan 2017 18:44:53 -0500 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 22 Jan 2017 15:44:52 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,270,1477983600"; d="scan'208";a="1116326817" Received: from ghffoulk-mobl.ger.corp.intel.com (HELO localhost) ([10.252.25.153]) by fmsmga002.fm.intel.com with ESMTP; 22 Jan 2017 15:44:49 -0800 From: Jarkko Sakkinen To: tpmdd-devel@lists.sourceforge.net Cc: linux-security-module@vger.kernel.org, Jarkko Sakkinen , Peter Huewe , Marcel Selhorst , Jason Gunthorpe , linux-kernel@vger.kernel.org (open list) Subject: [PATCH RFC v4 2/5] tpm: export tpm2_flush_context_cmd Date: Mon, 23 Jan 2017 01:44:30 +0200 Message-Id: <20170122234438.12102-3-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170122234438.12102-1-jarkko.sakkinen@linux.intel.com> References: <20170122234438.12102-1-jarkko.sakkinen@linux.intel.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm.h | 2 ++ drivers/char/tpm/tpm2-cmd.c | 62 +++++++++++++++++++++------------------------ 2 files changed, 31 insertions(+), 33 deletions(-) diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 037def5..d7f748f 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -551,6 +551,8 @@ static inline void tpm_add_ppi(struct tpm_chip *chip) int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf); int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash); int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max); +void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle, + unsigned int flags); int tpm2_seal_trusted(struct tpm_chip *chip, struct trusted_key_payload *payload, struct trusted_key_options *options); diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 4cc0853..6eb9517 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -414,6 +414,35 @@ static const struct tpm_input_header tpm2_get_tpm_pt_header = { }; /** + * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command + * @chip: TPM chip to use + * @payload: the key data in clear and encrypted form + * @options: authentication values and other options + * + * Return: same as with tpm_transmit_cmd + */ +void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle, + unsigned int flags) +{ + struct tpm_buf buf; + int rc; + + rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT); + if (rc) { + dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n", + handle); + return; + } + + tpm_buf_append_u32(&buf, handle); + + (void) tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags, + "flushing context"); + + tpm_buf_destroy(&buf); +} + +/** * tpm_buf_append_auth() - append TPMS_AUTH_COMMAND to the buffer. * * @buf: an allocated tpm_buf instance @@ -623,39 +652,6 @@ static int tpm2_load_cmd(struct tpm_chip *chip, } /** - * tpm2_flush_context_cmd() - execute a TPM2_FlushContext command - * - * @chip: TPM chip to use - * @handle: the key data in clear and encrypted form - * @flags: tpm transmit flags - * - * Return: Same as with tpm_transmit_cmd. - */ -static void tpm2_flush_context_cmd(struct tpm_chip *chip, u32 handle, - unsigned int flags) -{ - struct tpm_buf buf; - int rc; - - rc = tpm_buf_init(&buf, TPM2_ST_NO_SESSIONS, TPM2_CC_FLUSH_CONTEXT); - if (rc) { - dev_warn(&chip->dev, "0x%08x was not flushed, out of memory\n", - handle); - return; - } - - tpm_buf_append_u32(&buf, handle); - - rc = tpm_transmit_cmd(chip, buf.data, PAGE_SIZE, 0, flags, - "flushing context"); - if (rc) - dev_warn(&chip->dev, "0x%08x was not flushed, rc=%d\n", handle, - rc); - - tpm_buf_destroy(&buf); -} - -/** * tpm2_unseal_cmd() - execute a TPM2_Unload command * * @chip: TPM chip to use