From patchwork Sat Mar 10 08:24:27 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winkler, Tomas" X-Patchwork-Id: 10273319 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 04568605CE for ; Sat, 10 Mar 2018 08:28:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E9F4529DEA for ; Sat, 10 Mar 2018 08:28:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DEC3229E09; Sat, 10 Mar 2018 08:28:46 +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 869B929DEA for ; Sat, 10 Mar 2018 08:28:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932967AbeCJI2S (ORCPT ); Sat, 10 Mar 2018 03:28:18 -0500 Received: from mga12.intel.com ([192.55.52.136]:63004 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751974AbeCJI2P (ORCPT ); Sat, 10 Mar 2018 03:28:15 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Mar 2018 00:28:15 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.47,450,1515484800"; d="scan'208";a="24039468" Received: from twinkler-lnx.jer.intel.com ([10.12.91.43]) by orsmga008.jf.intel.com with ESMTP; 10 Mar 2018 00:28:13 -0800 From: Tomas Winkler To: Jarkko Sakkinen , Jason Gunthorpe Cc: Alexander Usyskin , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tomas Winkler Subject: [PATCH v2 7/8] tpm: Move pcr extend to tpm2-cmd.c Date: Sat, 10 Mar 2018 10:24:27 +0200 Message-Id: <20180310082428.31519-8-tomas.winkler@intel.com> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180310082428.31519-1-tomas.winkler@intel.com> References: <20180310082428.31519-1-tomas.winkler@intel.com> Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: X-Virus-Scanned: ClamAV using ClamSMTP Add tpm2_pcr_extend function to tpm2-cmd.c with signature required by tpm-interface.c. It wraps the original open code implementation. The original original tpm2_pcr_extend function is renamed and made static, called only from new tpm2_pcr_extend. Signed-off-by: Tomas Winkler --- drivers/char/tpm/tpm-interface.c | 25 +++++-------------------- drivers/char/tpm/tpm.h | 3 +-- drivers/char/tpm/tpm2-cmd.c | 25 +++++++++++++++++++++++-- 3 files changed, 29 insertions(+), 24 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 90e14462500a..d347ad8325c6 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -391,31 +391,16 @@ EXPORT_SYMBOL_GPL(tpm_pcr_read); int tpm_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash) { int rc; - struct tpm2_digest digest_list[ARRAY_SIZE(chip->active_banks)]; - u32 count = 0; - int i; chip = tpm_chip_find_get(chip); if (!chip) return -ENODEV; - if (chip->flags & TPM_CHIP_FLAG_TPM2) { - memset(digest_list, 0, sizeof(digest_list)); - - for (i = 0; i < ARRAY_SIZE(chip->active_banks) && - chip->active_banks[i] != TPM2_ALG_ERROR; i++) { - digest_list[i].alg_id = chip->active_banks[i]; - memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); - count++; - } - - rc = tpm2_pcr_extend(chip, pcr_idx, count, digest_list); - tpm_put_ops(chip); - return rc; - } - - rc = tpm1_pcr_extend(chip, pcr_idx, hash, - "attempting extend a PCR value"); + if (chip->flags & TPM_CHIP_FLAG_TPM2) + rc = tpm2_pcr_extend(chip, pcr_idx, hash); + else + rc = tpm1_pcr_extend(chip, pcr_idx, hash, + "attempting extend a PCR value"); tpm_put_ops(chip); return rc; } diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index 434f11c23e3e..2b88aadc4743 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -578,8 +578,7 @@ static inline u32 tpm2_rc_value(u32 rc) int tpm2_get_timeouts(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, u32 count, - struct tpm2_digest *digests); +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); diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 07636aa6f1a9..80eb4bb5feef 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -223,8 +223,8 @@ struct tpm2_null_auth_area { * * Return: Same as with tpm_transmit_cmd. */ -int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count, - struct tpm2_digest *digests) +static int __tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count, + struct tpm2_digest *digests) { struct tpm_buf buf; struct tpm2_null_auth_area auth_area; @@ -270,6 +270,27 @@ int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count, return rc; } +int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash) +{ + int rc; + struct tpm2_digest digest_list[ARRAY_SIZE(chip->active_banks)]; + u32 count = 0; + int i; + + memset(digest_list, 0, sizeof(digest_list)); + + for (i = 0; i < ARRAY_SIZE(chip->active_banks); i++) { + if (chip->active_banks[i] == TPM2_ALG_ERROR) + break; + digest_list[i].alg_id = chip->active_banks[i]; + memcpy(digest_list[i].digest, hash, TPM_DIGEST_SIZE); + count++; + } + + rc = __tpm2_pcr_extend(chip, pcr_idx, count, digest_list); + return rc; +} + #define TPM2_GETRANDOM_IN_SIZE \ (sizeof(struct tpm_input_header) + \