From mboxrd@z Thu Jan 1 00:00:00 1970 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 213F0C77B62 for ; Wed, 22 Mar 2023 16:21:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230374AbjCVQVT (ORCPT ); Wed, 22 Mar 2023 12:21:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230200AbjCVQVO (ORCPT ); Wed, 22 Mar 2023 12:21:14 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E7B060D55; Wed, 22 Mar 2023 09:20:53 -0700 (PDT) Received: from pps.filterd (m0333521.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32MCY50n002418; Wed, 22 Mar 2023 16:20:23 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=f04KKnVE6bf7zGWWJZG7CsnZsZq4OfQdu8k+D2doVsc=; b=1Hra1EJBx+mRlolekca+7rSGhMFvmmaliZEIF0588iqw/QTiNkppTJ0W+9+p4pK6GVL2 dp4rSO+sN9CB2mL8PacveQx10JGF44wTTuY+8TkfslEWiHWWv40o9yHfhqqSh5ukLtZb xcGFZNKnvS0DkTmC18FYD0VK10keFUoZvKlZyvmvOAsE5r+swFlTvP4EbyyWGoeKcnbo aeSRioTGeWqzsg3+ZEq8q5pkS2ClBn68zN32zjjJHH0hsKiJFc0KygAmSuGLeZx9jBZf Gp5dgEKQVV6ktN4ukPjnp0YXcjN8SCfCz76TR2Eke0fgmAgZSqXGuH8bar7t5OVKIzXD hA== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3pd47tsgmv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 22 Mar 2023 16:20:22 +0000 Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.5/8.17.1.5) with ESMTP id 32MGJVlX008290; Wed, 22 Mar 2023 16:20:21 GMT Received: from nam04-dm6-obe.outbound.protection.outlook.com (mail-dm6nam04lp2049.outbound.protection.outlook.com [104.47.73.49]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3pg53jg0rv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 22 Mar 2023 16:20:21 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=lMbDL9uDR8yJNzeymMu+zsiiLTcy2ofS8JoEsKwLyOrLOJnnL2hjiI4kYJsvyQA+IyblpUjAKLfohO4NGZsb8ruuje/BLaiVcyaEoDYH/c0lmKXrUZuHor057GUmIuUTyn+Kf5CmhDNDUH85jYz7hZwu1MDyz7CS/QP+x6ZEblqGHgP/GKTvoMur9l7auxL1xQVAU9fr5D8MKj1RScmFJCe6RD09Ixokt3KxFf/fqbY0ehkDvzm5PQK2FMJKnKDzkRZaJ2l8qE/R4ZkujKZ+bYLd5EJtCktVWy+vHF/SsrBMLxsLRlPdsVvq1dNnnVPv5XAeiRMPzawmUdlA1NGK4g== 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=f04KKnVE6bf7zGWWJZG7CsnZsZq4OfQdu8k+D2doVsc=; b=VD8w80YDHV5TadLEElk5YuScqdbODKe2RixOvTok3yN9/IeL24LlBvMRZabr/GHwjC02MPSdfwjbLUYQ7L4ceAUUP+zZNP6onPb7GWMgv5uIDYJpC/bjkbFUKaPJBiek+H7h/yfBTN0ibzIkDB210Aaw2eGvnmCEPryVxkAbqRRqkl//RL/7kZK111zaqebb4Qt0k+4ranVg3UHpCDZU17+8EeOeuUt6pNuDik/vqH+wZWZ0pU0dTmg8+uvc3MpP3x5llPmWXrjgsBnt0e3qRRvzrfo7LdvpNIUc7Bz3+7k/FM40xd7mA+BHHf5dR93HhCv0mmXKyJFDZ71gYZIlzg== 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=f04KKnVE6bf7zGWWJZG7CsnZsZq4OfQdu8k+D2doVsc=; b=PT/RYwLJdzvMzfKjhwQo3doIqapurZML70hoGC7PROfeYMg+U4Jn2jQ2c+Obdj5nBChErti0QzH6vc+TqSR+yf42E0Xg6wpTY4kJj3lgSmtqLpHM6y9iZzgAtptzCNlnBwRxwYViNkEslzIzASDArsf5WHZgsbodZOr717D6RmM= Received: from CH2PR10MB4150.namprd10.prod.outlook.com (2603:10b6:610:ac::13) by MW6PR10MB7688.namprd10.prod.outlook.com (2603:10b6:303:246::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.37; Wed, 22 Mar 2023 16:20:17 +0000 Received: from CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::a326:1794:402f:1adb]) by CH2PR10MB4150.namprd10.prod.outlook.com ([fe80::a326:1794:402f:1adb%3]) with mapi id 15.20.6178.037; Wed, 22 Mar 2023 16:20:17 +0000 From: Eric Snowberg To: jarkko@kernel.org, zohar@linux.ibm.com, dhowells@redhat.com, dwmw2@infradead.org Cc: 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, eric.snowberg@oracle.com, kanth.ghatraju@oracle.com, konrad.wilk@oracle.com, erpalmer@linux.vnet.ibm.com, coxu@redhat.com, jlee@suse.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 v6 5/6] KEYS: CA link restriction Date: Wed, 22 Mar 2023 12:16:33 -0400 Message-Id: <20230322161634.2233838-6-eric.snowberg@oracle.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20230322161634.2233838-1-eric.snowberg@oracle.com> References: <20230322161634.2233838-1-eric.snowberg@oracle.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BY3PR10CA0001.namprd10.prod.outlook.com (2603:10b6:a03:255::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_|MW6PR10MB7688:EE_ X-MS-Office365-Filtering-Correlation-Id: c24d99c8-1489-419e-4253-08db2af152ff 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:(13230025)(396003)(136003)(346002)(376002)(366004)(39860400002)(451199018)(38100700002)(186003)(41300700001)(316002)(66476007)(44832011)(8676002)(5660300002)(36756003)(66556008)(4326008)(8936002)(66946007)(2906002)(7416002)(478600001)(6666004)(86362001)(2616005)(6512007)(1076003)(6486002)(6506007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?2SKL0/LSkGe2cWZv1tz4uFJCJrHJ8r/guWrFrYYRl5Y2Dg5c5CeBgVimXez9?= =?us-ascii?Q?q7BCdgSqTmd+IKb6wRsFyHrc4SiXPdgClPn8Hkn45M4HZ1Zs58tZbYGzcazl?= =?us-ascii?Q?OZGacJq4JpsSGYhYTulzg8kZPQGyh6sQMc1uHvakys1XRI69hD2+568f8QNc?= =?us-ascii?Q?GCYXmZk9JVNor5q5UVwNAOVsliBZUGcs/hZIEHujK66fJw26T2A6meGTLBCJ?= =?us-ascii?Q?u496NRTNeIk0uBsEM/F7yItPP3jAIamk8FaNqqxxb/7FWn9XPtHcJKasqNXb?= =?us-ascii?Q?WWhkjThg0mDSlbCVdrB9I46+g3bpLAxvTTj02dl4YUNwAZ3z3o2uFxZlCYcU?= =?us-ascii?Q?58GcJNET3Z07dwD3crSJ55Yu7klRar+lKVfyWAonTHJgaZ6VqKcgCxBQ002m?= =?us-ascii?Q?RWB5z8QoGvGPJhNKi2sll3Y32ncj2NiHQi+UVGMKKxcYF3pUAM/llENOA4nW?= =?us-ascii?Q?cWxeP3gLKAKyC8pY/K5nQZ5KnKwZrGYpYHWI8GNkcqXzorjECBkL98AGmLdM?= =?us-ascii?Q?btu+OzT/zRpdk1tfHVyOfQbzKKRxznLz2BA+h+Vfk4xTwioe3tRv8r++/qrx?= =?us-ascii?Q?ThAjtrVpbtTnYFSGAVYnGXlXleyt0zR0DsqtNzQAMc1iN21zanm2ZAmvkpsR?= =?us-ascii?Q?BoJ76kO3MPOq8Hpk+GGNvMyGuV8z/7pSiTOayKSbwGBQo/q+hckarRE3tja3?= =?us-ascii?Q?QsQtLP336+1f+CPhVaVjgF2Q0p4jQNk0lApSwCtnqJBdw99RudPcbsSkESPL?= =?us-ascii?Q?bm2wDqH4HDu9mpuXDtHqhCW+YNRDszJs+7F7PBetcKbyw9pyF1lSWe3ki+i2?= =?us-ascii?Q?KMFDzLX2DTSFr3U0s9iowcAPg+rksWhb9PpjFqQOLrfko7GA+3IZHd6bjbwX?= =?us-ascii?Q?OuvHmDhlnid8jXpTsjwsDFjtarwOz9gDkb4/svj9ibhvDABWAq7vwyn1RVF9?= =?us-ascii?Q?HrgFBWAKPIMu1dKgggOQUdyKe6ztSt8vtHrvM5n2sMtbR38WL+RcteY/5WeP?= =?us-ascii?Q?YRXMBxWk/kJMN6KvrPxwOsui8zUlHMoz15qCWHC8VDW694BDyXxsiWlDdKys?= =?us-ascii?Q?sNZNxG40MI839BJPVhTwkd9pwgeQ8L4/5iSw/mJiS7hIvQMRB6OmYYX+J9pA?= =?us-ascii?Q?oYExBSBPeZ0QmgKl37DWH/MpUQI7JR6sQv7n75LJg5QTJIwHKCT40dUKkMIv?= =?us-ascii?Q?skcqTBVbkAj6GgCAYvw0R1O6sSMDP/NJRoxcE0nQ83KwPeiGRBFF6mU+cXLR?= =?us-ascii?Q?C0gd0gKBbRnUy6T+2khczgzzySXTY3dnmKBmA+5+Ww4oBAQIcrM6MNwHUIYE?= =?us-ascii?Q?YxYnHvbD6Q9xJSduKLUeHtV930wIkR86KZADumh2xa1bePEZq6Ig7YFm8WAK?= =?us-ascii?Q?2M84u5QXnDDZlmKNlyjkDlY+RXHXDfCd8fE1EYQiXuppnamruv2sc4JmafBy?= =?us-ascii?Q?8ExczIaYo+1Eyn0FTFDvLZAIXQc1KQ9HUFhVgPCoITHDdV+rKPbyVrkNoWNN?= =?us-ascii?Q?drRuhtnWRrAHOTyIJEctS5p2qcGGxTy9UW4AxfHE79yPooxpFrDG2wDhuCME?= =?us-ascii?Q?1gkACNXlaG5Wwgzc/mku5noRrr+Wa4HFxott7tFYgUKrMJwgslQeI4p9+7KE?= =?us-ascii?Q?JV0T3J2nMOLQjsqx0Ne4DEU=3D?= X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?us-ascii?Q?1fEHoTCpJh5Tt4Z30rCl+NcbxwObXKQrxJSQKAm/hZTC1AUH9NJhAJmIJnUQ?= =?us-ascii?Q?xoHIaox2yVIm0z3cAzSq6W0sKvkJHFlGN9P8aklYROp3esu6uaEkhr2spyk1?= =?us-ascii?Q?/N5hggMtfaFuhxB+qHnIY2AYuZW0PLFh8koxQE4JyMEGeIXa1ggzmrkJDp+v?= =?us-ascii?Q?mTZyiH9eFp/jwqB+01OVgbo1dgRkSNr1TM5Qn8oc9uceJCeuBuO4f1vzjlyM?= =?us-ascii?Q?Bg6P0O5tI+Wjciiozq9meyHfngraAZ4D0TAZkAEwYF2dWcECr68R/PhYJ8Hd?= =?us-ascii?Q?cqTgBRfTL1E6iwqZviZ6TZa+drT1ejSi4ph+8CQpgj/qJR7OzyRoooYdZ9Y4?= =?us-ascii?Q?o1HHGjXVAKm9vC9J8rcMRtGokxQBezCRYzFOjbWJzmu4+hlIRDSPmFjyN1vl?= =?us-ascii?Q?2Vv98Sg2bkajnghaRxLgvUuOwiTbU1n1m8HcfC3Jmqf4EKBtZJ1cWSzV3HLn?= =?us-ascii?Q?LuxnXtI5wj01iDpMpzrbMQC1TFmC9rJHQo3C+sqEww40vlInpd5DByuxtdvj?= =?us-ascii?Q?zpljLoduvDVZQNBJUdfFGkQ6F8K1FmhMdX4gZNo/vR12LT2XE7g1OgDXK4yT?= =?us-ascii?Q?F3475vgtj6UWNk8M5iimeVs8eQyjG97mi8KSrzawor1/IsZNNviauA04FGUc?= =?us-ascii?Q?ij6QHFazhWoxtnr2mRgpDtzGdhHJp3/oNOI7JkR4pTq1961gFQNFAElsIFGw?= =?us-ascii?Q?PGKzOwXnmgyXw0L8IU0evByXJKTUFZ0MaUoAPDwH8SgQoP9PsRiTzGTQAFv1?= =?us-ascii?Q?f20km9AQz3EO37I3gS8+QYTNt36xEJaxyzoHay53sc0TpYYugcEt1UDttKpr?= =?us-ascii?Q?kr28uUozB14Cvs8o+FC/38C8sd7GX0TcUhcpudOK3QEBLNjjJPfvMVrdjGe9?= =?us-ascii?Q?yxZyi+UnoKXK00vr/uRd4bYu4Ae6mhzw98W/opEF/aoELfqJQrWtMr0Ztofa?= =?us-ascii?Q?QjRwcr8w6nN7qrzUHFg6rTCDtDXv6hnK3iU0ArBJYYudjFbSSpbl9CqQIJ44?= =?us-ascii?Q?HTf/2JILB9SgHKV4zK4f7txIe2J0gPsUt2ATTCsKLIkcHrcQqP/dIUe9EuWo?= =?us-ascii?Q?kigrNjlGaXHZ2Yk56sRM2dhzG/rh0VPW44nIkEpnGCcRlTjNvcKU0cjRTV51?= =?us-ascii?Q?SP5DM0g8IZviyIp5n/OsFCEhmyD44H+ua1IQ9BzgHbiQ2oVF3e8TC3LcAaiU?= =?us-ascii?Q?IRezmwSz1p5s7w3m?= X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: c24d99c8-1489-419e-4253-08db2af152ff X-MS-Exchange-CrossTenant-AuthSource: CH2PR10MB4150.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Mar 2023 16:20:17.3345 (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: AYaeYdytC3WNHz1ckPdeLQLGp2kI5F25fqyQ60iKTjDRW6K8STk+v43sorOi9NNWoOHWAxjDYwHGxc+JTkQjRp/84o6ne51zHy65g7/R+GM= X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW6PR10MB7688 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-03-22_13,2023-03-22_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 bulkscore=0 mlxscore=0 adultscore=0 phishscore=0 spamscore=0 mlxlogscore=999 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303150002 definitions=main-2303220115 X-Proofpoint-GUID: zUpLddMecVk65VqPsKG9lHGhTOeBA_o2 X-Proofpoint-ORIG-GUID: zUpLddMecVk65VqPsKG9lHGhTOeBA_o2 Precedence: bulk List-ID: X-Mailing-List: keyrings@vger.kernel.org Add a new link restriction. Restrict the addition of keys in a keyring based on the key to be added being a CA. Signed-off-by: Eric Snowberg Reviewed-by: Mimi Zohar --- crypto/asymmetric_keys/restrict.c | 42 +++++++++++++++++++++++++++++++ include/crypto/public_key.h | 15 +++++++++++ 2 files changed, 57 insertions(+) diff --git a/crypto/asymmetric_keys/restrict.c b/crypto/asymmetric_keys/restrict.c index 6b1ac5f5896a..dd9ced32c8a1 100644 --- a/crypto/asymmetric_keys/restrict.c +++ b/crypto/asymmetric_keys/restrict.c @@ -108,6 +108,48 @@ int restrict_link_by_signature(struct key *dest_keyring, return ret; } +/** + * restrict_link_by_ca - Restrict additions to a ring of CA keys + * @dest_keyring: Keyring being linked to. + * @type: The type of key being added. + * @payload: The payload of the new key. + * @trust_keyring: Unused. + * + * Check if the new certificate is a CA. If it is a CA, then mark the new + * certificate as being ok to link. + * + * Returns 0 if the new certificate was accepted, -ENOKEY if the + * certificate is not a CA. -ENOPKG if the signature uses unsupported + * crypto, or some other error if there is a matching certificate but + * the signature check cannot be performed. + */ +int restrict_link_by_ca(struct key *dest_keyring, + const struct key_type *type, + const union key_payload *payload, + struct key *trust_keyring) +{ + const struct public_key *pkey; + + if (type != &key_type_asymmetric) + return -EOPNOTSUPP; + + pkey = payload->data[asym_crypto]; + + if (!pkey) + return -ENOPKG; + + if (!test_bit(KEY_EFLAG_CA, &pkey->key_eflags)) + return -ENOKEY; + + if (!test_bit(KEY_EFLAG_KEYCERTSIGN, &pkey->key_eflags)) + return -ENOKEY; + + if (test_bit(KEY_EFLAG_DIGITALSIG, &pkey->key_eflags)) + return -ENOKEY; + + return 0; +} + static bool match_either_id(const struct asymmetric_key_id **pair, const struct asymmetric_key_id *single) { diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h index 03c3fb990d59..653992a6e941 100644 --- a/include/crypto/public_key.h +++ b/include/crypto/public_key.h @@ -75,6 +75,21 @@ extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring, const union key_payload *payload, struct key *trusted); +#if IS_REACHABLE(CONFIG_ASYMMETRIC_KEY_TYPE) +extern int restrict_link_by_ca(struct key *dest_keyring, + const struct key_type *type, + const union key_payload *payload, + struct key *trust_keyring); +#else +static inline int restrict_link_by_ca(struct key *dest_keyring, + const struct key_type *type, + const union key_payload *payload, + struct key *trust_keyring) +{ + return 0; +} +#endif + extern int query_asymmetric_key(const struct kernel_pkey_params *, struct kernel_pkey_query *); -- 2.27.0