From patchwork Sun Nov 25 15:14:55 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nayna Jain X-Patchwork-Id: 10696873 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 767F55A4 for ; Sun, 25 Nov 2018 15:18:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6595829755 for ; Sun, 25 Nov 2018 15:18:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 592AF2975A; Sun, 25 Nov 2018 15:18:49 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0BD3E29761 for ; Sun, 25 Nov 2018 15:18:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726611AbeKZCKC (ORCPT ); Sun, 25 Nov 2018 21:10:02 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:35494 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726602AbeKZCKB (ORCPT ); Sun, 25 Nov 2018 21:10:01 -0500 Received: from pps.filterd (m0098404.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id wAPFEUBe106330 for ; Sun, 25 Nov 2018 10:18:44 -0500 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0a-001b2d01.pphosted.com with ESMTP id 2nymnc6nsw-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Sun, 25 Nov 2018 10:18:44 -0500 Received: from localhost by e06smtp03.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) Sun, 25 Nov 2018 15:18:38 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id wAPFIb1H55377972 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 25 Nov 2018 15:18:37 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 28DBC4C058; Sun, 25 Nov 2018 15:18:37 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BE8954C040; Sun, 25 Nov 2018 15:18:33 +0000 (GMT) Received: from swastik.ibmuc.com (unknown [9.85.72.131]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sun, 25 Nov 2018 15:18:33 +0000 (GMT) From: Nayna Jain To: linux-integrity@vger.kernel.org Cc: linux-security-module@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, zohar@linux.ibm.com, dhowells@redhat.com, jforbes@redhat.com, seth.forshee@canonical.com, kexec@lists.infradead.org, keyrings@vger.kernel.org, vgoyal@redhat.com, ebiederm@xmission.com, mpe@ellerman.id.au, Nayna Jain Subject: [PATCH 2/7] integrity: Load certs to the platform keyring Date: Sun, 25 Nov 2018 20:44:55 +0530 X-Mailer: git-send-email 2.13.6 In-Reply-To: <20181125151500.8298-1-nayna@linux.ibm.com> References: <20181125151500.8298-1-nayna@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18112515-0012-0000-0000-000002CFEAE1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18112515-0013-0000-0000-000021052447 Message-Id: <20181125151500.8298-3-nayna@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-11-25_14:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1811250071 Sender: linux-integrity-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-integrity@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The patch refactors integrity_load_x509(), making it a wrapper for a new function named integrity_add_key(). This patch also defines a new function named integrity_load_cert() for loading the platform keys. Signed-off-by: Nayna Jain Reviewed-by: Mimi Zohar --- security/integrity/digsig.c | 71 ++++++++++++++-------- security/integrity/integrity.h | 20 ++++++ .../integrity/platform_certs/platform_keyring.c | 23 +++++++ 3 files changed, 90 insertions(+), 24 deletions(-) diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c index fef2a858300c..ab30c451a19b 100644 --- a/security/integrity/digsig.c +++ b/security/integrity/digsig.c @@ -82,8 +82,7 @@ static int __integrity_init_keyring(const unsigned int id, key_perm_t perm, keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0), KGIDT_INIT(0), cred, perm, - KEY_ALLOC_NOT_IN_QUOTA, - restriction, NULL); + KEY_ALLOC_NOT_IN_QUOTA, restriction, NULL); if (IS_ERR(keyring[id])) { err = PTR_ERR(keyring[id]); pr_info("Can't allocate %s keyring (%d)\n", @@ -124,16 +123,38 @@ int __init integrity_init_keyring(const unsigned int id) return err; } -int __init integrity_load_x509(const unsigned int id, const char *path) +int __init integrity_add_key(const unsigned int id, const void *data, + off_t size, key_perm_t perm) { key_ref_t key; - void *data; - loff_t size; - int rc; + int rc = 0; if (!keyring[id]) return -EINVAL; + key = key_create_or_update(make_key_ref(keyring[id], 1), "asymmetric", + NULL, data, size, perm, + KEY_ALLOC_NOT_IN_QUOTA); + if (IS_ERR(key)) { + rc = PTR_ERR(key); + pr_err("Problem loading X.509 certificate %d\n", rc); + } else { + pr_notice("Loaded X.509 cert '%s'\n", + key_ref_to_ptr(key)->description); + key_ref_put(key); + } + + return rc; + +} + +int __init integrity_load_x509(const unsigned int id, const char *path) +{ + void *data; + loff_t size; + int rc; + key_perm_t perm; + rc = kernel_read_file_from_path(path, &data, &size, 0, READING_X509_CERTIFICATE); if (rc < 0) { @@ -141,23 +162,25 @@ int __init integrity_load_x509(const unsigned int id, const char *path) return rc; } - key = key_create_or_update(make_key_ref(keyring[id], 1), - "asymmetric", - NULL, - data, - size, - ((KEY_POS_ALL & ~KEY_POS_SETATTR) | - KEY_USR_VIEW | KEY_USR_READ), - KEY_ALLOC_NOT_IN_QUOTA); - if (IS_ERR(key)) { - rc = PTR_ERR(key); - pr_err("Problem loading X.509 certificate (%d): %s\n", - rc, path); - } else { - pr_notice("Loaded X.509 cert '%s': %s\n", - key_ref_to_ptr(key)->description, path); - key_ref_put(key); - } + perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW | KEY_USR_READ; + + pr_info("Loading X.509 certificate: %s\n", path); + rc = integrity_add_key(id, (const void *)data, size, perm); + vfree(data); - return 0; + return rc; +} + +int __init integrity_load_cert(const unsigned int id, const char *source, + const void *data, size_t len, key_perm_t perm) +{ + int rc; + + if (!data) + return -EINVAL; + + pr_info("Loading X.509 certificate: %s\n", source); + rc = integrity_add_key(id, data, len, perm); + + return rc; } diff --git a/security/integrity/integrity.h b/security/integrity/integrity.h index c2332a44799e..3517d2852a07 100644 --- a/security/integrity/integrity.h +++ b/security/integrity/integrity.h @@ -154,6 +154,8 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, int __init integrity_init_keyring(const unsigned int id); int __init integrity_load_x509(const unsigned int id, const char *path); +int __init integrity_load_cert(const unsigned int id, const char *source, + const void *data, size_t len, key_perm_t perm); #else static inline int integrity_digsig_verify(const unsigned int id, @@ -167,6 +169,14 @@ static inline int integrity_init_keyring(const unsigned int id) { return 0; } + +static inline int __init integrity_load_cert(const unsigned int id, + const char *source, + const void *data, size_t len, + key_perm_t perm) +{ + return 0; +} #endif /* CONFIG_INTEGRITY_SIGNATURE */ #ifdef CONFIG_INTEGRITY_ASYMMETRIC_KEYS @@ -223,3 +233,13 @@ integrity_audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type) } #endif + +#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING +void __init add_to_platform_keyring(const char *source, const void *data, + size_t len); +#else +static inline void __init add_to_platform_keyring(const char *source, + const void *data, size_t len) +{ +} +#endif diff --git a/security/integrity/platform_certs/platform_keyring.c b/security/integrity/platform_certs/platform_keyring.c index dfc206bbe2ff..dc49b3b02697 100644 --- a/security/integrity/platform_certs/platform_keyring.c +++ b/security/integrity/platform_certs/platform_keyring.c @@ -18,6 +18,29 @@ #include #include "../integrity.h" +/** + * add_to_platform_keyring - Add to platform keyring without validation. + * @source: Source of key + * @data: The blob holding the key + * @len: The length of the data blob + * + * Add a key to the platform keyring without checking its trust chain. This + * is available only during kernel initialisation. + */ +void __init add_to_platform_keyring(const char *source, const void *data, + size_t len) +{ + key_perm_t perm; + int rc; + + perm = (KEY_POS_ALL & ~KEY_POS_SETATTR) | KEY_USR_VIEW; + + rc = integrity_load_cert(INTEGRITY_KEYRING_PLATFORM, source, data, len, + perm); + if (rc) + pr_info("Error adding keys to platform keyring %s\n", source); +} + /* * Create the trusted keyrings. */