From patchwork Wed Dec 14 00:33:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Snowberg X-Patchwork-Id: 633963 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 76A5CC4332F for ; Wed, 14 Dec 2022 00:34:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237808AbiLNAel (ORCPT ); Tue, 13 Dec 2022 19:34:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53432 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237783AbiLNAeh (ORCPT ); Tue, 13 Dec 2022 19:34:37 -0500 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C42361DA79; Tue, 13 Dec 2022 16:34:36 -0800 (PST) Received: from pps.filterd (m0333520.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 2BDLNrUm028189; Wed, 14 Dec 2022 00:34:07 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2022-7-12; bh=cTAomxXzPIDWsbpstlgHWraRKzhHg031SenIx2me/6U=; b=klcPyIIClZucSom2R7BEAPIXxkfz6JldzSW4wSK40uNvguy/MvRhu5aGtjOQrdBds4DR qbySHvN7yUrFmEik7rvc2jPiR6MK7inYmf8ZZcC2D4f5woMU7HaviMkOFvAgYFvu4bH+ SOVxmV1ZijvrpDbhLFvWfFbTYShfo07xCItzw8e5G48ORgxH0FWu9aJvIYpyoqsbs6Fm Fn+JS942U2vgmwwr4kHoVf/D4hGDsWoHqCNExVvSBcVZEIcDmXKxkeeEwDbocp0D8oZA waUbS6gR/aJ/SrdBaJwu35XJAum7RFvGwj8+HMFff2EHow5LsMxFy2fHqjtI1G3E7RA6 WA== Received: from iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta01.appoci.oracle.com [130.35.100.223]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3meyeu0p8b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 14 Dec 2022 00:34:07 +0000 Received: from pps.filterd (iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 2BE01HTi012437; Wed, 14 Dec 2022 00:34:06 GMT Received: from nam11-bn8-obe.outbound.protection.outlook.com (mail-bn8nam11lp2168.outbound.protection.outlook.com [104.47.58.168]) by iadpaimrmta01.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3meyev4sg2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 14 Dec 2022 00:34:06 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=e4N+uAnj3cbdo0Mgj5t9+IkeTkoVvjLuTcZMkvpkSpbVF1FVNs6yL2oC3UTipofkXLQpOpH573lkfUEpfwm4+wA1Ut42lQvBUlSVJyyELpcEAkURFn+8mxf0RrpZnCclX/ZAWpAtLCb325NN/vm8rg+vTY89PNx5Q8XpQfetQosgLbLZk00KCkSCA0dljy/qpgdJsoEwBntks2bhkyXgKOZk4cctHMcPkh08ShgdqEBhcN+zE2Vnx+Z2MwUN4JT9cnNHwTsAGIjAenCvLXb58E//MxwaK9xPQ9H+g4QB6S3pKjaJ2eDCJWkUNqMYb41WWP6A7nfqkauTZswh8IPemg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=cTAomxXzPIDWsbpstlgHWraRKzhHg031SenIx2me/6U=; b=JdnFnenPfc63v8MQeXR6DQbg4ZRIDcZo6EcbwFwIBelA100Tn4nBhixdM4hUv1NnXto4ZiRrCUwuebO2OKwU+p6k58oHXUUlitsReC6Ym5cMyRXmELCd08Hko7XHu6KDthM5/LsUDC/8W8JrHFaSD1PCNq4n044v4qX2KVcoOKFoYLfdJpUjGJM1oW7SmDU62Cwpg5HPl6XIrPe70oEOGI+Zlle26tTU3P4BiKQy2I+JRsYO/cirpS3dq/D/0eLrJge3IEca/IPU1lg7eo20O81Tnk70GciCA/3WRbqCm7TmD+3FNZ1PRmZJ0B3IxvMksYyxDjqbebwtGQMO1AAOZA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=cTAomxXzPIDWsbpstlgHWraRKzhHg031SenIx2me/6U=; b=UP+/jRPQkSuTf2fGFRMAlISgAEIExiDeA3JtUWXku1BWg0Qn9XoiweVQFUHa+XwxEF9Q9jt04c1EHfxbnCyJMZ7kf3d/1Y/LnjKN93VJPb2PvJXQnuXZml/sUVDt17P88yOpuF15Vcy3wRmIc991IXEAk9myxaVGVXrvaJBqqzk= Received: from CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) by BN0PR10MB5223.namprd10.prod.outlook.com (2603:10b6:408:12a::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5880.19; Wed, 14 Dec 2022 00:34:05 +0000 Received: from CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::f006:f411:9056:63a4]) by CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::f006:f411:9056:63a4%4]) with mapi id 15.20.5880.019; Wed, 14 Dec 2022 00:34:04 +0000 From: Eric Snowberg To: jarkko@kernel.org, zohar@linux.ibm.com Cc: dhowells@redhat.com, dwmw2@infradead.org, herbert@gondor.apana.org.au, davem@davemloft.net, dmitry.kasatkin@gmail.com, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, pvorel@suse.cz, noodles@fb.com, tiwai@suse.de, eric.snowberg@oracle.com, kanth.ghatraju@oracle.com, konrad.wilk@oracle.com, erpalmer@linux.vnet.ibm.com, coxu@redhat.com, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-integrity@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH v3 03/10] KEYS: X.509: Parse Basic Constraints for CA Date: Tue, 13 Dec 2022 19:33:54 -0500 Message-Id: <20221214003401.4086781-4-eric.snowberg@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20221214003401.4086781-1-eric.snowberg@oracle.com> References: <20221214003401.4086781-1-eric.snowberg@oracle.com> X-ClientProxiedBy: DS7PR06CA0027.namprd06.prod.outlook.com (2603:10b6:8:54::6) To CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PR10MB4150:EE_|BN0PR10MB5223:EE_ X-MS-Office365-Filtering-Correlation-Id: 2a47f8bb-17f3-468f-0416-08dadd6ae785 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:CH2PR10MB4150.namprd10.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230022)(396003)(39860400002)(346002)(376002)(366004)(136003)(451199015)(41300700001)(38100700002)(86362001)(6486002)(8936002)(478600001)(6666004)(4326008)(66946007)(8676002)(316002)(66556008)(186003)(2906002)(6512007)(66476007)(6506007)(7416002)(1076003)(44832011)(2616005)(5660300002)(36756003); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2a47f8bb-17f3-468f-0416-08dadd6ae785 X-MS-Exchange-CrossTenant-AuthSource: CH2PR10MB4150.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Dec 2022 00:34:04.8903 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: AVZm6QoXsZBLNVOzegH+yivmniSYypsHBPyMxYLDDvR+iyvBt9hsjCoqI/SAatz2yBi9/dl2lS73K0gB3uSJ3VPbjNB83PlpAsjItWkZCNo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN0PR10MB5223 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.923,Hydra:6.0.545,FMLib:17.11.122.1 definitions=2022-12-13_03,2022-12-13_01,2022-06-22_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 suspectscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2212140002 X-Proofpoint-ORIG-GUID: ZfxX5ZQhCLBW_gpxjKA0hBQYi563WrY7 X-Proofpoint-GUID: ZfxX5ZQhCLBW_gpxjKA0hBQYi563WrY7 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Parse the X.509 Basic Constraints. The basic constraints extension identifies whether the subject of the certificate is a CA. BasicConstraints ::= SEQUENCE { cA BOOLEAN DEFAULT FALSE, pathLenConstraint INTEGER (0..MAX) OPTIONAL } If the CA is true, store it in the x509_certificate. This will be used in a follow on patch that requires knowing if the public key is a CA. Signed-off-by: Eric Snowberg --- crypto/asymmetric_keys/x509_cert_parser.c | 9 +++++++++ crypto/asymmetric_keys/x509_parser.h | 1 + 2 files changed, 10 insertions(+) diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c index 7a9b084e2043..b4443e507153 100644 --- a/crypto/asymmetric_keys/x509_cert_parser.c +++ b/crypto/asymmetric_keys/x509_cert_parser.c @@ -586,6 +586,15 @@ int x509_process_extension(void *context, size_t hdrlen, return 0; } + if (ctx->last_oid == OID_basicConstraints) { + if (vlen < 2 || v[0] != (ASN1_CONS_BIT | ASN1_SEQ)) + return -EBADMSG; + if (v[1] != vlen - 2) + return -EBADMSG; + if (vlen >= 4 && v[1] != 0 && v[2] == ASN1_BOOL && v[3] == 1) + ctx->cert->root_ca = true; + } + return 0; } diff --git a/crypto/asymmetric_keys/x509_parser.h b/crypto/asymmetric_keys/x509_parser.h index a299c9c56f40..7c5c0ad1c22e 100644 --- a/crypto/asymmetric_keys/x509_parser.h +++ b/crypto/asymmetric_keys/x509_parser.h @@ -38,6 +38,7 @@ struct x509_certificate { bool self_signed; /* T if self-signed (check unsupported_sig too) */ bool unsupported_sig; /* T if signature uses unsupported crypto */ bool blacklisted; + bool root_ca; /* T if basic constraints CA is set */ }; /*