From patchwork Wed Apr 6 01:53:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Snowberg X-Patchwork-Id: 12803245 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 D7BBAC433FE for ; Wed, 6 Apr 2022 12:02:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232392AbiDFMEI (ORCPT ); Wed, 6 Apr 2022 08:04:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232619AbiDFMCu (ORCPT ); Wed, 6 Apr 2022 08:02:50 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A2AD5435BCB; Tue, 5 Apr 2022 18:54:32 -0700 (PDT) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 235KPK5u012575; Wed, 6 Apr 2022 01:53:58 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-2021-07-09; bh=o/zCn4Jl8NCicvbuQYM+5Tvhf3dsxlMVqbRsQbSVVNQ=; b=SikcTHpaVIu80RSMd1iP1936FhueJoyNAtPMSfj2I7tNeVwD+Ilv/DC58nZVTCM50zM1 KU2kLD5vb1XYHN0yyLeab9A3sWuhsQr8SNJW00A5OsvQ0aBt8/x7uU9N7jy1U53vYCrB /EqmnGeA1PSsS5+OQJyMGm+u9ZN66AmbSaZ6ZvsfN5LiCBPwg/gkFuN0fL4npWgtv6T3 4ObqjDlVhJnWGs/qwgmYXuDMVXId+wMRY4jTKw2X5iXo5Z55BGLFKglzN0Nklz4Pmlfx C89kvtQqlgEndMJwmB4L1eyUzUbCMpKaSeOXiw1Xxa/2O+i09kwqdsL1B5xU+xHVN7hf Ag== Received: from phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta01.appoci.oracle.com [138.1.114.2]) by mx0b-00069f02.pphosted.com with ESMTP id 3f6cwcfdkr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 01:53:58 +0000 Received: from pps.filterd (phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com (8.16.1.2/8.16.1.2) with SMTP id 2361oQGB003487; Wed, 6 Apr 2022 01:53:56 GMT Received: from nam10-dm6-obe.outbound.protection.outlook.com (mail-dm6nam10lp2100.outbound.protection.outlook.com [104.47.58.100]) by phxpaimrmta01.imrmtpd1.prodappphxaev1.oraclevcn.com with ESMTP id 3f6cx42aen-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 06 Apr 2022 01:53:56 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=M/TUjZSdTOP1FDRQ05xKs2CHfVvuZQSsyEHCH6jp6wzutE24gIsBb1NL2NKUQkx6co/MMrJVLfGlVrBz77pp+VukI83s5AnEANhNDf2z+0sqfghKvM+ksV8LwDFHfCmwbit3XsfhOsbzzTOTWMrkcrDhNVMt8M+8+UrZesiEr0UvvWH7CNHIZAJEJVF59q+o4LYahepBoO8/eEEKGoIFJft2ABSNe9B4WJmUGCZ3MzilMspD94w1NUKlK3hZJ5AuUDHqqMTtXJKvhedghQm5lOhpxg0nmXeb3beisBEld+7QQCAPbRma/5rz1sUGC9aPHpVAqdvFKZ5sPw68X17Ouw== 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=o/zCn4Jl8NCicvbuQYM+5Tvhf3dsxlMVqbRsQbSVVNQ=; b=kdEgeuWGifVdck/CG6LVZyORq7dMJAFgueuPrhrnXGJ+Q0lv0KvQMCQhl62DmVfmia/bTfQDE+s9z882D5QaVfFQxuTG3/r62vXvDasd527G0ITAiq0i0o4xuZEnIIHcsph0ePbneVwUcHO+KZVYhwqOmWn8jN/lL7r4GfKCIleCXbT8bv8lTpAMIIXvDpm7peTnBWVQAiguTOH9M95EiBBPnvyMvW/t+AN5l+9iAuU5HLjZC7fccwg0S+a0Se45/wvgDbweuX02Ku3UFzWLv+T7WXQgS4sHHyJmtG98aeKVFjwSfuuDtt2TWRLnAUReixyyIQ4wRH3VhlTDAki52Q== 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=o/zCn4Jl8NCicvbuQYM+5Tvhf3dsxlMVqbRsQbSVVNQ=; b=XlLHhGpYatyqzYgFfxHU5sMTjOn3lzihE50mpqlHatQIK35b236xsF2NRcbD+iE3cb8AOElOtj2Wk9W0jNw/UNyewPJeoeCsKJ6ltckm0aZM9BPkrU/2hdgt73JyyFClz5nTH+sAEFjKWExm2t6aA6exDBmmrvNg6PkNIaMKgjA= Received: from CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) by MN2PR10MB4349.namprd10.prod.outlook.com (2603:10b6:208:1d4::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5123.31; Wed, 6 Apr 2022 01:53:54 +0000 Received: from CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::7ded:5b3:a28f:2e55]) by CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::7ded:5b3:a28f:2e55%5]) with mapi id 15.20.5123.031; Wed, 6 Apr 2022 01:53:54 +0000 From: Eric Snowberg To: dhowells@redhat.com, dwmw2@infradead.org, jarkko@kernel.org, zohar@linux.ibm.com, linux-integrity@vger.kernel.org Cc: herbert@gondor.apana.org.au, davem@davemloft.net, dmitry.kasatkin@gmail.com, jmorris@namei.org, serge@hallyn.com, roberto.sassu@huawei.com, nramas@linux.microsoft.com, eric.snowberg@oracle.com, pvorel@suse.cz, tiwai@suse.de, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-security-module@vger.kernel.org Subject: [PATCH 2/7] KEYS: X.509: Parse Basic Constraints for CA Date: Tue, 5 Apr 2022 21:53:32 -0400 Message-Id: <20220406015337.4000739-3-eric.snowberg@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220406015337.4000739-1-eric.snowberg@oracle.com> References: <20220406015337.4000739-1-eric.snowberg@oracle.com> X-ClientProxiedBy: SA0PR11CA0091.namprd11.prod.outlook.com (2603:10b6:806:d1::6) To CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 17d64086-39c2-40d2-2ce8-08da17704dcf X-MS-TrafficTypeDiagnostic: MN2PR10MB4349:EE_ X-Microsoft-Antispam-PRVS: 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:(13230001)(366004)(66476007)(8676002)(6486002)(6506007)(6512007)(6666004)(5660300002)(508600001)(316002)(4326008)(66556008)(1076003)(36756003)(186003)(26005)(44832011)(38350700002)(38100700002)(66946007)(2616005)(86362001)(8936002)(2906002)(7416002)(52116002);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: 17d64086-39c2-40d2-2ce8-08da17704dcf X-MS-Exchange-CrossTenant-AuthSource: CH2PR10MB4150.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 06 Apr 2022 01:53:54.7429 (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: y++nujo++N62+T/AzVcyPixYyT+HPtsd9Puthhl2deguIRWQfBxvnDxPPchnSp/DWbFNFpEkLYzB5e6G4vsw+ndBfAv52bHX3GqgZgWaplo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR10MB4349 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.425,18.0.850 definitions=2022-04-05_08:2022-04-04,2022-04-05 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 spamscore=0 bulkscore=0 adultscore=0 mlxscore=0 phishscore=0 suspectscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2202240000 definitions=main-2204060004 X-Proofpoint-ORIG-GUID: e-rJVk0NhOkAdxtOHzD6PTnpE_4n2QDT X-Proofpoint-GUID: e-rJVk0NhOkAdxtOHzD6PTnpE_4n2QDT 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 2899ed80bb18..30f7374ea9c0 100644 --- a/crypto/asymmetric_keys/x509_cert_parser.c +++ b/crypto/asymmetric_keys/x509_cert_parser.c @@ -583,6 +583,15 @@ 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->is_root_ca = true; + } + return 0; } diff --git a/crypto/asymmetric_keys/x509_parser.h b/crypto/asymmetric_keys/x509_parser.h index 97a886cbe01c..dc45df9f6594 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 is_root_ca; /* T if basic constraints CA is set */ }; /*