From patchwork Thu Oct 24 03:47:12 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nayna Jain X-Patchwork-Id: 1182617 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46zD0D4jxrz9sCJ for ; Thu, 24 Oct 2019 14:54:52 +1100 (AEDT) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 46zD0D3nTrzDqTJ for ; Thu, 24 Oct 2019 14:54:52 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 46zCrH0xvBzDqSL for ; Thu, 24 Oct 2019 14:47:59 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) by bilbo.ozlabs.org (Postfix) with ESMTP id 46zCrF1crxz8svV for ; Thu, 24 Oct 2019 14:47:57 +1100 (AEDT) Received: by ozlabs.org (Postfix) id 46zCrF00hVz9sPx; Thu, 24 Oct 2019 14:47:57 +1100 (AEDT) Delivered-To: linuxppc-dev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.ibm.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=nayna@linux.ibm.com; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 46zCrD244yz9sPp for ; Thu, 24 Oct 2019 14:47:56 +1100 (AEDT) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9O3l6gH095742 for ; Wed, 23 Oct 2019 23:47:54 -0400 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2vu0uddtxt-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 23 Oct 2019 23:47:54 -0400 Received: from localhost by e06smtp04.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 24 Oct 2019 04:47:46 +0100 Received: from d06av26.portsmouth.uk.ibm.com (d06av26.portsmouth.uk.ibm.com [9.149.105.62]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9O3lipj54591500 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 24 Oct 2019 03:47:44 GMT Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9F1F2AE045; Thu, 24 Oct 2019 03:47:44 +0000 (GMT) Received: from d06av26.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D42F8AE051; Thu, 24 Oct 2019 03:47:41 +0000 (GMT) Received: from localhost.localdomain (unknown [9.40.192.65]) by d06av26.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 24 Oct 2019 03:47:41 +0000 (GMT) From: Nayna Jain To: linuxppc-dev@ozlabs.org, linux-efi@vger.kernel.org, linux-integrity@vger.kernel.org Subject: [PATCH v9 3/8] powerpc: detect the trusted boot state of the system Date: Wed, 23 Oct 2019 22:47:12 -0500 X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191024034717.70552-1-nayna@linux.ibm.com> References: <20191024034717.70552-1-nayna@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 x-cbid: 19102403-0016-0000-0000-000002BC7C2F X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19102403-0017-0000-0000-0000331DBEC2 Message-Id: <20191024034717.70552-4-nayna@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-24_02:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=628 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910240033 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Prakhar Srivastava , Ard Biesheuvel , Eric Ricther , Nayna Jain , linux-kernel@vger.kernel.org, Mimi Zohar , Claudio Carvalho , Matthew Garret , Lakshmi Ramasubramanian , Greg Kroah-Hartman , Paul Mackerras , Jeremy Kerr , Elaine Palmer , Oliver O'Halloran , George Wilson Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" While secure boot permits only properly verified signed kernels to be booted, trusted boot calculates the file hash of the kernel image and stores the measurement prior to boot, that can be subsequently compared against good known values via attestation services. This patch reads the trusted boot state of a PowerNV system. The state is used to conditionally enable additional measurement rules in the IMA arch-specific policies. Signed-off-by: Nayna Jain --- arch/powerpc/include/asm/secure_boot.h | 6 ++++++ arch/powerpc/kernel/secure_boot.c | 26 ++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/arch/powerpc/include/asm/secure_boot.h b/arch/powerpc/include/asm/secure_boot.h index 07d0fe0ca81f..a2ff556916c6 100644 --- a/arch/powerpc/include/asm/secure_boot.h +++ b/arch/powerpc/include/asm/secure_boot.h @@ -11,6 +11,7 @@ #ifdef CONFIG_PPC_SECURE_BOOT bool is_ppc_secureboot_enabled(void); +bool is_ppc_trustedboot_enabled(void); #else @@ -19,5 +20,10 @@ static inline bool is_ppc_secureboot_enabled(void) return false; } +static inline bool is_ppc_trustedboot_enabled(void) +{ + return false; +} + #endif #endif diff --git a/arch/powerpc/kernel/secure_boot.c b/arch/powerpc/kernel/secure_boot.c index 63dc82c50862..a6a5f17ede03 100644 --- a/arch/powerpc/kernel/secure_boot.c +++ b/arch/powerpc/kernel/secure_boot.c @@ -7,6 +7,17 @@ #include #include +static struct device_node *get_ppc_fw_sb_node(void) +{ + static const struct of_device_id ids[] = { + { .compatible = "ibm,secureboot-v1", }, + { .compatible = "ibm,secureboot-v2", }, + {}, + }; + + return of_find_matching_node(NULL, ids); +} + bool is_ppc_secureboot_enabled(void) { struct device_node *node; @@ -30,3 +41,18 @@ bool is_ppc_secureboot_enabled(void) pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); return enabled; } + +bool is_ppc_trustedboot_enabled(void) +{ + struct device_node *node; + bool enabled = false; + + node = get_ppc_fw_sb_node(); + enabled = of_property_read_bool(node, "trusted-enabled"); + + of_node_put(node); + + pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled"); + + return enabled; +}