All of lore.kernel.org
 help / color / mirror / Atom feed
From: David Howells <dhowells@redhat.com>
To: Eric Snowberg <eric.snowberg@oracle.com>
Cc: "Jarkko Sakkinen" <jarkko.sakkinen@linux.intel.com>,
	"Randy Dunlap" <rdunlap@infradead.org>,
	keyrings@vger.kernel.org, dhowells@redhat.com,
	"Jarkko Sakkinen" <jarkko@kernel.org>,
	"Mickaël Salaün" <mic@digikod.net>,
	keyrings@vger.kernel.org, linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v3 3/4] certs: Add ability to preload revocation certs
Date: Tue, 09 Mar 2021 13:21:06 +0000	[thread overview]
Message-ID: <161529606657.163428.3340689182456495390.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <161529604216.163428.4905283330048991183.stgit@warthog.procyon.org.uk>

From: Eric Snowberg <eric.snowberg@oracle.com>

Add a new Kconfig option called SYSTEM_REVOCATION_KEYS. If set,
this option should be the filename of a PEM-formated file containing
X.509 certificates to be included in the default blacklist keyring.

DH Changes:
 - Make the new Kconfig option depend on SYSTEM_REVOCATION_LIST.
 - Fix SYSTEM_REVOCATION_KEYS=n, but CONFIG_SYSTEM_REVOCATION_LIST=y[1][2].
 - Use CONFIG_SYSTEM_REVOCATION_LIST for extract-cert[3].
 - Use CONFIG_SYSTEM_REVOCATION_LIST for revocation_certificates.o[3].

Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Acked-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Randy Dunlap <rdunlap@infradead.org>
cc: keyrings@vger.kernel.org
Link: https://lore.kernel.org/r/20200930201508.35113-3-eric.snowberg@oracle.com/
Link: https://lore.kernel.org/r/20210122181054.32635-4-eric.snowberg@oracle.com/ # v5
Link: https://lore.kernel.org/r/161428673564.677100.4112098280028451629.stgit@warthog.procyon.org.uk/
Link: https://lore.kernel.org/r/161433312452.902181.4146169951896577982.stgit@warthog.procyon.org.uk/ # v2
Link: https://lore.kernel.org/r/e1c15c74-82ce-3a69-44de-a33af9b320ea@infradead.org/ [1]
Link: https://lore.kernel.org/r/20210303034418.106762-1-eric.snowberg@oracle.com/ [2]
Link: https://lore.kernel.org/keyrings/20210304175030.184131-1-eric.snowberg@oracle.com/ [3]
---

 certs/Kconfig                   |    8 ++++++++
 certs/Makefile                  |   19 +++++++++++++++++--
 certs/blacklist.c               |   21 +++++++++++++++++++++
 certs/revocation_certificates.S |   21 +++++++++++++++++++++
 scripts/Makefile                |    1 +
 5 files changed, 68 insertions(+), 2 deletions(-)
 create mode 100644 certs/revocation_certificates.S

diff --git a/certs/Kconfig b/certs/Kconfig
index 76e469b56a77..ab88d2a7f3c7 100644
--- a/certs/Kconfig
+++ b/certs/Kconfig
@@ -92,4 +92,12 @@ config SYSTEM_REVOCATION_LIST
 	  blacklist keyring and implements a hook whereby a PKCS#7 message can
 	  be checked to see if it matches such a certificate.
 
+config SYSTEM_REVOCATION_KEYS
+	string "X.509 certificates to be preloaded into the system blacklist keyring"
+	depends on SYSTEM_REVOCATION_LIST
+	help
+	  If set, this option should be the filename of a PEM-formatted file
+	  containing X.509 certificates to be included in the default blacklist
+	  keyring.
+
 endmenu
diff --git a/certs/Makefile b/certs/Makefile
index f4b90bad8690..b6db52ebf0be 100644
--- a/certs/Makefile
+++ b/certs/Makefile
@@ -4,7 +4,8 @@
 #
 
 obj-$(CONFIG_SYSTEM_TRUSTED_KEYRING) += system_keyring.o system_certificates.o common.o
-obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o
+obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist.o common.o
+obj-$(CONFIG_SYSTEM_REVOCATION_LIST) += revocation_certificates.o
 ifneq ($(CONFIG_SYSTEM_BLACKLIST_HASH_LIST),"")
 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
 else
@@ -29,7 +30,7 @@ $(obj)/x509_certificate_list: scripts/extract-cert $(SYSTEM_TRUSTED_KEYS_SRCPREF
 	$(call if_changed,extract_certs,$(SYSTEM_TRUSTED_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_TRUSTED_KEYS))
 endif # CONFIG_SYSTEM_TRUSTED_KEYRING
 
-clean-files := x509_certificate_list .x509.list
+clean-files := x509_certificate_list .x509.list x509_revocation_list
 
 ifeq ($(CONFIG_MODULE_SIG),y)
 ###############################################################################
@@ -104,3 +105,17 @@ targets += signing_key.x509
 $(obj)/signing_key.x509: scripts/extract-cert $(X509_DEP) FORCE
 	$(call if_changed,extract_certs,$(MODULE_SIG_KEY_SRCPREFIX)$(CONFIG_MODULE_SIG_KEY))
 endif # CONFIG_MODULE_SIG
+
+ifeq ($(CONFIG_SYSTEM_REVOCATION_LIST),y)
+
+$(eval $(call config_filename,SYSTEM_REVOCATION_KEYS))
+
+$(obj)/revocation_certificates.o: $(obj)/x509_revocation_list
+
+quiet_cmd_extract_certs  = EXTRACT_CERTS   $(patsubst "%",%,$(2))
+      cmd_extract_certs  = scripts/extract-cert $(2) $@
+
+targets += x509_revocation_list
+$(obj)/x509_revocation_list: scripts/extract-cert $(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(SYSTEM_REVOCATION_KEYS_FILENAME) FORCE
+	$(call if_changed,extract_certs,$(SYSTEM_REVOCATION_KEYS_SRCPREFIX)$(CONFIG_SYSTEM_REVOCATION_KEYS))
+endif
diff --git a/certs/blacklist.c b/certs/blacklist.c
index 2b8644123d5f..c9a435b15af4 100644
--- a/certs/blacklist.c
+++ b/certs/blacklist.c
@@ -17,9 +17,15 @@
 #include <linux/uidgid.h>
 #include <keys/system_keyring.h>
 #include "blacklist.h"
+#include "common.h"
 
 static struct key *blacklist_keyring;
 
+#ifdef CONFIG_SYSTEM_REVOCATION_LIST
+extern __initconst const u8 revocation_certificate_list[];
+extern __initconst const unsigned long revocation_certificate_list_size;
+#endif
+
 /*
  * The description must be a type prefix, a colon and then an even number of
  * hex digits.  The hash is kept in the description.
@@ -220,3 +226,18 @@ static int __init blacklist_init(void)
  * Must be initialised before we try and load the keys into the keyring.
  */
 device_initcall(blacklist_init);
+
+#ifdef CONFIG_SYSTEM_REVOCATION_LIST
+/*
+ * Load the compiled-in list of revocation X.509 certificates.
+ */
+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);
+}
+late_initcall(load_revocation_certificate_list);
+#endif
diff --git a/certs/revocation_certificates.S b/certs/revocation_certificates.S
new file mode 100644
index 000000000000..f21aae8a8f0e
--- /dev/null
+++ b/certs/revocation_certificates.S
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/export.h>
+#include <linux/init.h>
+
+	__INITRODATA
+
+	.align 8
+	.globl revocation_certificate_list
+revocation_certificate_list:
+__revocation_list_start:
+	.incbin "certs/x509_revocation_list"
+__revocation_list_end:
+
+	.align 8
+	.globl revocation_certificate_list_size
+revocation_certificate_list_size:
+#ifdef CONFIG_64BIT
+	.quad __revocation_list_end - __revocation_list_start
+#else
+	.long __revocation_list_end - __revocation_list_start
+#endif
diff --git a/scripts/Makefile b/scripts/Makefile
index b5418ec587fb..bd0718f7c493 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -11,6 +11,7 @@ hostprogs-always-$(CONFIG_ASN1)				+= asn1_compiler
 hostprogs-always-$(CONFIG_MODULE_SIG_FORMAT)		+= sign-file
 hostprogs-always-$(CONFIG_SYSTEM_TRUSTED_KEYRING)	+= extract-cert
 hostprogs-always-$(CONFIG_SYSTEM_EXTRA_CERTIFICATE)	+= insert-sys-cert
+hostprogs-always-$(CONFIG_SYSTEM_REVOCATION_LIST)	+= extract-cert
 
 HOSTCFLAGS_sorttable.o = -I$(srctree)/tools/include
 HOSTCFLAGS_asn1_compiler.o = -I$(srctree)/include



  parent reply	other threads:[~2021-03-09 13:22 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-09 13:20 [PATCH v3 0/4] keys: Add EFI_CERT_X509_GUID support for dbx/mokx entries David Howells
2021-03-09 13:20 ` [PATCH v3 1/4] certs: Add EFI_CERT_X509_GUID support for dbx entries David Howells
2021-03-09 13:20 ` [PATCH v3 2/4] certs: Move load_system_certificate_list to a common function David Howells
2021-03-09 13:21 ` David Howells [this message]
2021-03-09 13:21 ` [PATCH v3 4/4] integrity: Load mokx variables into the blacklist keyring David Howells
2021-03-10 19:32 ` [PATCH v3 0/4] keys: Add EFI_CERT_X509_GUID support for dbx/mokx entries Jarkko Sakkinen
2021-03-10 21:08 ` [PATCH v3 3/4] certs: Add ability to preload revocation certs David Howells
2021-03-10 22:47   ` Eric Snowberg

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=161529606657.163428.3340689182456495390.stgit@warthog.procyon.org.uk \
    --to=dhowells@redhat.com \
    --cc=eric.snowberg@oracle.com \
    --cc=jarkko.sakkinen@linux.intel.com \
    --cc=jarkko@kernel.org \
    --cc=keyrings@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=mic@digikod.net \
    --cc=rdunlap@infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.