From patchwork Tue Jun 20 09:38:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jarkko Sakkinen X-Patchwork-Id: 9799057 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 19EFD60329 for ; Tue, 20 Jun 2017 09:38:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0D2FB2810E for ; Tue, 20 Jun 2017 09:38:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 01F0028426; Tue, 20 Jun 2017 09:38:34 +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=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from lists.sourceforge.net (lists.sourceforge.net [216.34.181.88]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 63A98283A6 for ; Tue, 20 Jun 2017 09:38:34 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=sfs-ml-4.v29.ch3.sourceforge.com) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1dNFcH-00025E-HE; Tue, 20 Jun 2017 09:38:33 +0000 Received: from sog-mx-3.v43.ch3.sourceforge.com ([172.29.43.193] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1dNFcC-000254-VS for tpmdd-devel@lists.sourceforge.net; Tue, 20 Jun 2017 09:38:28 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=PmtQVZNZfVusL1OHlde3QSVy/A6njT/W5LUlbIBInxU=; b=QNYGD699P556ddEgxS/PSP86xi2fQ4u4hbRYf+P7HXxNpPF5u+a8P7XJFh2goNhTrDW4xrAoCX/9O15sGXYz83yHIBelW+Lny+aU5S/l1e01sUuSoEhEJPcpkXKnrjx3qMvdvSm1im0tv5R//V8SS75XbPgRZEi44AfJ7TWiqj0=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=PmtQVZNZfVusL1OHlde3QSVy/A6njT/W5LUlbIBInxU=; b=Tx9tRNVE40gv7sgw/aovSH2pYXgh10kYybc2vmyxd60Z9+kH7qQTwPcbY9LjKfbIvH1pKvwSoDJJ5asQrxTpMFUnodCra2dDLE3NBNO2CAfR0bx6H40kr4pPuWVVi8hHMs3vyHKSmpfCWTS1HAds8WgusMDVPavSLz7rA4+3jrc=; X-ACL-Warn: Received: from mga02.intel.com ([134.134.136.20]) by sog-mx-3.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.76) id 1dNFcC-0002uv-0m for tpmdd-devel@lists.sourceforge.net; Tue, 20 Jun 2017 09:38:28 +0000 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 20 Jun 2017 02:38:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,364,1493708400"; d="scan'208";a="116535958" Received: from yargotti-mobl1.ger.corp.intel.com (HELO localhost) ([10.252.1.138]) by fmsmga005.fm.intel.com with ESMTP; 20 Jun 2017 02:38:21 -0700 From: Jarkko Sakkinen To: tpmdd-devel@lists.sourceforge.net Date: Tue, 20 Jun 2017 11:38:03 +0200 Message-Id: <20170620093804.23803-3-jarkko.sakkinen@linux.intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20170620093804.23803-1-jarkko.sakkinen@linux.intel.com> References: <20170620093804.23803-1-jarkko.sakkinen@linux.intel.com> X-Headers-End: 1dNFcC-0002uv-0m Subject: [tpmdd-devel] [PATCH 2/2] tpm: migrate pubek_show to struct tpm_buf X-BeenThere: tpmdd-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: Tpm Device Driver maintainance List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: srajiv@linux.vnet.ibm.com, open list , linux-security-module@vger.kernel.org MIME-Version: 1.0 Errors-To: tpmdd-devel-bounces@lists.sourceforge.net X-Virus-Scanned: ClamAV using ClamSMTP Migrated pubek_show to struct tpm_buf and cleaned up its implementation. Previously the output parameter structure was declared but left completely unused. Now it is used to refer different fields of the output. We can move it to tpm-sysfs.c as it does not have any use outside of that file. Signed-off-by: Jarkko Sakkinen --- drivers/char/tpm/tpm-sysfs.c | 87 ++++++++++++++++++++++++-------------------- drivers/char/tpm/tpm.h | 13 ------- 2 files changed, 48 insertions(+), 52 deletions(-) diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index eedb8e47bde2..fcb69f1162ab 100644 --- a/drivers/char/tpm/tpm-sysfs.c +++ b/drivers/char/tpm/tpm-sysfs.c @@ -20,44 +20,48 @@ #include #include "tpm.h" -#define READ_PUBEK_RESULT_SIZE 314 +struct tpm_readpubek_out { + u8 algorithm[4]; + u8 encscheme[2]; + u8 sigscheme[2]; + __be32 paramsize; + u8 parameters[12]; + __be32 keysize; + u8 modulus[256]; + u8 checksum[20]; +} __packed; + #define READ_PUBEK_RESULT_MIN_BODY_SIZE (28 + 256) #define TPM_ORD_READPUBEK 124 -static const struct tpm_input_header tpm_readpubek_header = { - .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND), - .length = cpu_to_be32(30), - .ordinal = cpu_to_be32(TPM_ORD_READPUBEK) -}; + static ssize_t pubek_show(struct device *dev, struct device_attribute *attr, char *buf) { - u8 *data; - struct tpm_cmd_t tpm_cmd; - ssize_t err; - int i, rc; + struct tpm_buf tpm_buf; + struct tpm_readpubek_out *out; + ssize_t rc; + int i; char *str = buf; struct tpm_chip *chip = to_tpm_chip(dev); + char anti_replay[20]; - memset(&tpm_cmd, 0, sizeof(tpm_cmd)); - - tpm_cmd.header.in = tpm_readpubek_header; - err = tpm_transmit_cmd(chip, NULL, &tpm_cmd, READ_PUBEK_RESULT_SIZE, - READ_PUBEK_RESULT_MIN_BODY_SIZE, 0, - "attempting to read the PUBEK"); - if (err) - goto out; - - /* - ignore header 10 bytes - algorithm 32 bits (1 == RSA ) - encscheme 16 bits - sigscheme 16 bits - parameters (RSA 12->bytes: keybit, #primes, expbit) - keylenbytes 32 bits - 256 byte modulus - ignore checksum 20 bytes - */ - data = tpm_cmd.params.readpubek_out_buffer; + memset(&anti_replay, 0, sizeof(anti_replay)); + + rc = tpm_buf_init(&tpm_buf, TPM_TAG_RQU_COMMAND, TPM_ORD_READPUBEK); + if (rc) + return rc; + + tpm_buf_append(&tpm_buf, anti_replay, sizeof(anti_replay)); + + rc = tpm_transmit_cmd(chip, NULL, tpm_buf.data, PAGE_SIZE, + READ_PUBEK_RESULT_MIN_BODY_SIZE, 0, + "attempting to read the PUBEK"); + if (rc) { + tpm_buf_destroy(&tpm_buf); + return 0; + } + + out = (struct tpm_readpubek_out *)&tpm_buf.data[10]; str += sprintf(str, "Algorithm: %02X %02X %02X %02X\n" @@ -68,21 +72,26 @@ static ssize_t pubek_show(struct device *dev, struct device_attribute *attr, "%02X %02X %02X %02X\n" "Modulus length: %d\n" "Modulus:\n", - data[0], data[1], data[2], data[3], - data[4], data[5], - data[6], data[7], - data[12], data[13], data[14], data[15], - data[16], data[17], data[18], data[19], - data[20], data[21], data[22], data[23], - be32_to_cpu(*((__be32 *) (data + 24)))); + out->algorithm[0], out->algorithm[1], out->algorithm[2], + out->algorithm[3], + out->encscheme[0], out->encscheme[1], + out->sigscheme[0], out->sigscheme[1], + out->parameters[0], out->parameters[1], + out->parameters[2], out->parameters[3], + out->parameters[4], out->parameters[5], + out->parameters[6], out->parameters[7], + out->parameters[8], out->parameters[9], + out->parameters[10], out->parameters[11], + be32_to_cpu(out->keysize)); for (i = 0; i < 256; i++) { - str += sprintf(str, "%02X ", data[i + 28]); + str += sprintf(str, "%02X ", out->modulus[i]); if ((i + 1) % 16 == 0) str += sprintf(str, "\n"); } -out: + rc = str - buf; + tpm_buf_destroy(&tpm_buf); return rc; } static DEVICE_ATTR_RO(pubek); diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h index cdd261383dea..d9835b31f652 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -343,17 +343,6 @@ enum tpm_sub_capabilities { TPM_CAP_PROP_TIS_DURATION = 0x120, }; -struct tpm_readpubek_params_out { - u8 algorithm[4]; - u8 encscheme[2]; - u8 sigscheme[2]; - __be32 paramsize; - u8 parameters[12]; /*assuming RSA*/ - __be32 keysize; - u8 modulus[256]; - u8 checksum[20]; -} __packed; - typedef union { struct tpm_input_header in; struct tpm_output_header out; @@ -387,8 +376,6 @@ struct tpm_startup_in { } __packed; typedef union { - struct tpm_readpubek_params_out readpubek_out; - u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)]; struct tpm_pcrread_in pcrread_in; struct tpm_pcrread_out pcrread_out; struct tpm_getrandom_in getrandom_in;