From patchwork Mon Jun 13 21:57:01 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 583035 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 53261C43334 for ; Mon, 13 Jun 2022 21:57:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234202AbiFMV5S (ORCPT ); Mon, 13 Jun 2022 17:57:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346412AbiFMV5M (ORCPT ); Mon, 13 Jun 2022 17:57:12 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id DB26E21255 for ; Mon, 13 Jun 2022 14:57:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1655157426; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ErIisdD0lSY1B5KC6LvkzYL6COmxq7gEAPwuIIRZ77M=; b=Q6uXqq2Y2sf0JuAq+DWW0zHCsJ+pcOmR4RpdSmxyViDrI8yqX6APy2CT445CIgZ3w2pyCm tRE2BBPuUAKfZJyWM/fTNUfZ6ffEt4sFA3ojPqY1uzi3DYYCAurZ1CkvslkYkfwxHQBIez 2m3u6PxRdSbVY25xmDojY1N3q/zmaVg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-189-riefXtgqPM6Z-8Xw_HWQlQ-1; Mon, 13 Jun 2022 17:57:03 -0400 X-MC-Unique: riefXtgqPM6Z-8Xw_HWQlQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 27843185A79C; Mon, 13 Jun 2022 21:57:03 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.33.36.62]) by smtp.corp.redhat.com (Postfix) with ESMTP id 10AEC40CFD0A; Mon, 13 Jun 2022 21:57:01 +0000 (UTC) Organization: Red Hat UK Ltd. 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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 1/2] certs: Move load_certificate_list() to be with the asymmetric keys code From: David Howells To: Herbert Xu Cc: dhowells@redhat.com, simo@redhat.com, Jarkko Sakkinen , keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Date: Mon, 13 Jun 2022 22:57:01 +0100 Message-ID: <165515742145.1554877.13488098107542537203.stgit@warthog.procyon.org.uk> In-Reply-To: <165515741424.1554877.9363755381201121213.stgit@warthog.procyon.org.uk> References: <165515741424.1554877.9363755381201121213.stgit@warthog.procyon.org.uk> User-Agent: StGit/1.4 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Move load_certificate_list(), which loads a series of binary X.509 certificates from a blob and inserts them as keys into a keyring, to be with the asymmetric keys code that it drives. This makes it easier to add FIPS selftest code in which we need to load up a private keyring for the tests to use. Signed-off-by: David Howells --- certs/Makefile | 4 +- certs/blacklist.c | 8 ++--- certs/common.c | 57 ---------------------------------- certs/common.h | 9 ----- certs/system_keyring.c | 6 ++-- crypto/asymmetric_keys/Makefile | 1 + crypto/asymmetric_keys/x509_loader.c | 57 ++++++++++++++++++++++++++++++++++ include/keys/asymmetric-type.h | 3 ++ 8 files changed, 70 insertions(+), 75 deletions(-) delete mode 100644 certs/common.c delete mode 100644 certs/common.h create mode 100644 crypto/asymmetric_keys/x509_loader.c diff --git a/certs/Makefile b/certs/Makefile index cb1a9da3fc58..3aac9f33ee22 100644 --- a/certs/Makefile +++ b/certs/Makefile @@ -3,8 +3,8 @@ # Makefile for the linux kernel signature checking certificates. # -obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o -obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o +obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o +obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),) quiet_cmd_check_blacklist_hashes = CHECK $(patsubst "%",%,$(2)) diff --git a/certs/blacklist.c b/certs/blacklist.c index 25094ea73600..41f10601cc72 100644 --- a/certs/blacklist.c +++ b/certs/blacklist.c @@ -15,10 +15,9 @@ #include #include #include -#include +#include #include #include "blacklist.h" -#include "common.h" /* * According to crypto/asymmetric_keys/x509_cert_parser.c:x509_note_pkey_algo(), @@ -365,8 +364,9 @@ static __init int load_revocation_certificate_list(void) if (revocation_certificate_list_size) pr_notice("Loading compiled-in revocation X.509 certificates\n"); - return load_certificate_list(revocation_certificate_list, revocation_certificate_list_size, - blacklist_keyring); + return x509_load_certificate_list(revocation_certificate_list, + revocation_certificate_list_size, + blacklist_keyring); } late_initcall(load_revocation_certificate_list); #endif diff --git a/certs/common.c b/certs/common.c deleted file mode 100644 index 16a220887a53..000000000000 --- a/certs/common.c +++ /dev/null @@ -1,57 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later - -#include -#include -#include "common.h" - -int load_certificate_list(const u8 cert_list[], - const unsigned long list_size, - const struct key *keyring) -{ - key_ref_t key; - const u8 *p, *end; - size_t plen; - - p = cert_list; - end = p + list_size; - while (p < end) { - /* Each cert begins with an ASN.1 SEQUENCE tag and must be more - * than 256 bytes in size. - */ - if (end - p < 4) - goto dodgy_cert; - if (p[0] != 0x30 && - p[1] != 0x82) - goto dodgy_cert; - plen = (p[2] << 8) | p[3]; - plen += 4; - if (plen > end - p) - goto dodgy_cert; - - key = key_create_or_update(make_key_ref(keyring, 1), - "asymmetric", - NULL, - p, - plen, - ((KEY_POS_ALL & ~KEY_POS_SETATTR) | - KEY_USR_VIEW | KEY_USR_READ), - KEY_ALLOC_NOT_IN_QUOTA | - KEY_ALLOC_BUILT_IN | - KEY_ALLOC_BYPASS_RESTRICTION); - if (IS_ERR(key)) { - pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", - PTR_ERR(key)); - } else { - pr_notice("Loaded X.509 cert '%s'\n", - key_ref_to_ptr(key)->description); - key_ref_put(key); - } - p += plen; - } - - return 0; - -dodgy_cert: - pr_err("Problem parsing in-kernel X.509 certificate list\n"); - return 0; -} diff --git a/certs/common.h b/certs/common.h deleted file mode 100644 index abdb5795936b..000000000000 --- a/certs/common.h +++ /dev/null @@ -1,9 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ - -#ifndef _CERT_COMMON_H -#define _CERT_COMMON_H - -int load_certificate_list(const u8 cert_list[], const unsigned long list_size, - const struct key *keyring); - -#endif diff --git a/certs/system_keyring.c b/certs/system_keyring.c index 05b66ce9d1c9..5042cc54fa5e 100644 --- a/certs/system_keyring.c +++ b/certs/system_keyring.c @@ -16,7 +16,6 @@ #include #include #include -#include "common.h" static struct key *builtin_trusted_keys; #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING @@ -183,7 +182,8 @@ __init int load_module_cert(struct key *keyring) pr_notice("Loading compiled-in module X.509 certificates\n"); - return load_certificate_list(system_certificate_list, module_cert_size, keyring); + return x509_load_certificate_list(system_certificate_list, + module_cert_size, keyring); } /* @@ -204,7 +204,7 @@ static __init int load_system_certificate_list(void) size = system_certificate_list_size - module_cert_size; #endif - return load_certificate_list(p, size, builtin_trusted_keys); + return x509_load_certificate_list(p, size, builtin_trusted_keys); } late_initcall(load_system_certificate_list); diff --git a/crypto/asymmetric_keys/Makefile b/crypto/asymmetric_keys/Makefile index c38424f55b08..0f190500dd87 100644 --- a/crypto/asymmetric_keys/Makefile +++ b/crypto/asymmetric_keys/Makefile @@ -20,6 +20,7 @@ x509_key_parser-y := \ x509.asn1.o \ x509_akid.asn1.o \ x509_cert_parser.o \ + x509_loader.o \ x509_public_key.o $(obj)/x509_cert_parser.o: \ diff --git a/crypto/asymmetric_keys/x509_loader.c b/crypto/asymmetric_keys/x509_loader.c new file mode 100644 index 000000000000..1bc169dee22e --- /dev/null +++ b/crypto/asymmetric_keys/x509_loader.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include +#include +#include + +int x509_load_certificate_list(const u8 cert_list[], + const unsigned long list_size, + const struct key *keyring) +{ + key_ref_t key; + const u8 *p, *end; + size_t plen; + + p = cert_list; + end = p + list_size; + while (p < end) { + /* Each cert begins with an ASN.1 SEQUENCE tag and must be more + * than 256 bytes in size. + */ + if (end - p < 4) + goto dodgy_cert; + if (p[0] != 0x30 && + p[1] != 0x82) + goto dodgy_cert; + plen = (p[2] << 8) | p[3]; + plen += 4; + if (plen > end - p) + goto dodgy_cert; + + key = key_create_or_update(make_key_ref(keyring, 1), + "asymmetric", + NULL, + p, + plen, + ((KEY_POS_ALL & ~KEY_POS_SETATTR) | + KEY_USR_VIEW | KEY_USR_READ), + KEY_ALLOC_NOT_IN_QUOTA | + KEY_ALLOC_BUILT_IN | + KEY_ALLOC_BYPASS_RESTRICTION); + if (IS_ERR(key)) { + pr_err("Problem loading in-kernel X.509 certificate (%ld)\n", + PTR_ERR(key)); + } else { + pr_notice("Loaded X.509 cert '%s'\n", + key_ref_to_ptr(key)->description); + key_ref_put(key); + } + p += plen; + } + + return 0; + +dodgy_cert: + pr_err("Problem parsing in-kernel X.509 certificate list\n"); + return 0; +} diff --git a/include/keys/asymmetric-type.h b/include/keys/asymmetric-type.h index 6c5d4963e15b..69a13e1e5b2e 100644 --- a/include/keys/asymmetric-type.h +++ b/include/keys/asymmetric-type.h @@ -84,6 +84,9 @@ extern struct key *find_asymmetric_key(struct key *keyring, const struct asymmetric_key_id *id_2, bool partial); +int x509_load_certificate_list(const u8 cert_list[], const unsigned long list_size, + const struct key *keyring); + /* * The payload is at the discretion of the subtype. */