From patchwork Fri Sep 21 13:58:11 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Winkler, Tomas" X-Patchwork-Id: 10610123 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7912C15E8 for ; Fri, 21 Sep 2018 14:03:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 22881285CE for ; Fri, 21 Sep 2018 14:03:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 15E2B29B06; Fri, 21 Sep 2018 14:03:16 +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=ham 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 978C0285CE for ; Fri, 21 Sep 2018 14:03:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390365AbeIUTvV (ORCPT ); Fri, 21 Sep 2018 15:51:21 -0400 Received: from mga18.intel.com ([134.134.136.126]:4682 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389657AbeIUTvU (ORCPT ); Fri, 21 Sep 2018 15:51:20 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 21 Sep 2018 07:02:19 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,285,1534834800"; d="scan'208";a="71839147" Received: from twinkler-lnx.jer.intel.com ([10.12.91.48]) by fmsmga007.fm.intel.com with ESMTP; 21 Sep 2018 07:02:17 -0700 From: Tomas Winkler To: Jarkko Sakkinen , Jason Gunthorpe Cc: Alexander Usyskin , Tadeusz Struk , linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org, Tomas Winkler Subject: [PATCH v4 12/21] tpm: move pcr extend code to tpm2-cmd.c Date: Fri, 21 Sep 2018 16:58:11 +0300 Message-Id: <20180921135820.20549-13-tomas.winkler@intel.com> X-Mailer: git-send-email 2.14.4 In-Reply-To: <20180921135820.20549-1-tomas.winkler@intel.com> References: <20180921135820.20549-1-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 to __tpm2_pcr_extend() and made static, it is called only from new tpm2_pcr_extend(). Fix warnings in __tpm2_pcr_extend() tpm2-cmd.c:251:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] tpm2-cmd.c:252:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] Signed-off-by: Tomas Winkler --- V3: Fix the commit message. V4: 1. Fix the kdoc. 2. Fix the commit message. 3. Fix compilation warnings. drivers/char/tpm/tpm-interface.c | 24 +++++---------------- drivers/char/tpm/tpm.h | 3 +-- drivers/char/tpm/tpm2-cmd.c | 46 ++++++++++++++++++++++++++++++++-------- 3 files changed, 43 insertions(+), 30 deletions(-) diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c index 686b5316dad5..d18d9103a867 100644 --- a/drivers/char/tpm/tpm-interface.c +++ b/drivers/char/tpm/tpm-interface.c @@ -491,31 +491,17 @@ 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_find_get_ops(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; - } + 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"); - 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 fa88102a0cab..f0963a0a8acd 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -592,8 +592,7 @@ 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 *dest, 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 8da5a16e7c8c..728fa08c5531 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -211,23 +211,22 @@ struct tpm2_null_auth_area { } __packed; /** - * tpm2_pcr_extend() - extend a PCR value + * __tpm2_pcr_extend() - extend a PCR value * - * @chip: TPM chip to use. - * @pcr_idx: index of the PCR. - * @count: number of digests passed. - * @digests: list of pcr banks and corresponding digest values to extend. + * @chip: TPM chip to use. + * @pcr_idx: index of the PCR. + * @count: number of digests passed. + * @digests: list of pcr banks and corresponding digest values to extend. * * 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; + u32 i, j; int rc; - int i; - int j; if (count > ARRAY_SIZE(chip->active_banks)) return -EINVAL; @@ -267,6 +266,35 @@ int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, u32 count, return rc; } +/** + * tpm2_pcr_extend() - extend a PCR value + * + * @chip: TPM chip to use. + * @pcr_idx: index of the PCR to extend. + * @hash: the hash of a measurement. + * + * Return: Same as with tpm_transmit_cmd. + */ +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; + unsigned 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; +} + struct tpm2_get_random_out { __be16 size;