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From d98713c31c46b73c5a4a3653e42de063205e8e42 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Tue, 6 Oct 2015 16:09:25 -0400
Subject: [PATCH 182/225] Make any of the loaders that link in efi mode honor
secure boot.
And in this case "honor" means "even if somebody does link this in, they
won't register commands if SB is enabled."
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/Makefile.am | 1 +
grub-core/Makefile.core.def | 1 +
grub-core/commands/iorw.c | 7 +++++
grub-core/commands/memrw.c | 7 +++++
grub-core/kern/efi/efi.c | 28 ------------------
grub-core/kern/efi/sb.c | 58 ++++++++++++++++++++++++++++++++++++++
grub-core/loader/efi/appleloader.c | 7 +++++
grub-core/loader/efi/chainloader.c | 1 +
grub-core/loader/i386/bsd.c | 7 +++++
grub-core/loader/i386/linux.c | 7 +++++
grub-core/loader/i386/pc/linux.c | 7 +++++
grub-core/loader/multiboot.c | 7 +++++
grub-core/loader/xnu.c | 7 +++++
include/grub/efi/efi.h | 1 -
include/grub/efi/sb.h | 29 +++++++++++++++++++
include/grub/ia64/linux.h | 0
include/grub/mips/linux.h | 0
include/grub/powerpc/linux.h | 0
include/grub/sparc64/linux.h | 0
19 files changed, 146 insertions(+), 29 deletions(-)
create mode 100644 grub-core/kern/efi/sb.c
create mode 100644 include/grub/efi/sb.h
create mode 100644 include/grub/ia64/linux.h
create mode 100644 include/grub/mips/linux.h
create mode 100644 include/grub/powerpc/linux.h
create mode 100644 include/grub/sparc64/linux.h
diff --git a/grub-core/Makefile.am b/grub-core/Makefile.am
index 104513847..f7b4d29b0 100644
--- a/grub-core/Makefile.am
+++ b/grub-core/Makefile.am
@@ -71,6 +71,7 @@ KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/command.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/device.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/disk.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/dl.h
+KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/efi/sb.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/env.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/env_private.h
KERNEL_HEADER_FILES += $(top_srcdir)/include/grub/err.h
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index 079180919..031609c20 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -200,6 +200,7 @@ kernel = {
i386_multiboot = kern/i386/pc/acpi.c;
i386_coreboot = kern/acpi.c;
i386_multiboot = kern/acpi.c;
+ common = kern/efi/sb.c;
x86 = kern/i386/tsc.c;
x86 = kern/i386/tsc_pit.c;
diff --git a/grub-core/commands/iorw.c b/grub-core/commands/iorw.c
index a0c164e54..41a7f3f04 100644
--- a/grub-core/commands/iorw.c
+++ b/grub-core/commands/iorw.c
@@ -23,6 +23,7 @@
#include <grub/env.h>
#include <grub/cpu/io.h>
#include <grub/i18n.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -118,6 +119,9 @@ grub_cmd_write (grub_command_t cmd, int argc, char **argv)
GRUB_MOD_INIT(memrw)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_read_byte =
grub_register_extcmd ("inb", grub_cmd_read, 0,
N_("PORT"), N_("Read 8-bit value from PORT."),
@@ -146,6 +150,9 @@ GRUB_MOD_INIT(memrw)
GRUB_MOD_FINI(memrw)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_extcmd (cmd_read_byte);
grub_unregister_extcmd (cmd_read_word);
grub_unregister_extcmd (cmd_read_dword);
diff --git a/grub-core/commands/memrw.c b/grub-core/commands/memrw.c
index 98769eadb..088cbe9e2 100644
--- a/grub-core/commands/memrw.c
+++ b/grub-core/commands/memrw.c
@@ -22,6 +22,7 @@
#include <grub/extcmd.h>
#include <grub/env.h>
#include <grub/i18n.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -120,6 +121,9 @@ grub_cmd_write (grub_command_t cmd, int argc, char **argv)
GRUB_MOD_INIT(memrw)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_read_byte =
grub_register_extcmd ("read_byte", grub_cmd_read, 0,
N_("ADDR"), N_("Read 8-bit value from ADDR."),
@@ -148,6 +152,9 @@ GRUB_MOD_INIT(memrw)
GRUB_MOD_FINI(memrw)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_extcmd (cmd_read_byte);
grub_unregister_extcmd (cmd_read_word);
grub_unregister_extcmd (cmd_read_dword);
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 4bfde0dac..caa9d9979 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -278,34 +278,6 @@ grub_efi_get_variable (const char *var, const grub_efi_guid_t *guid,
return NULL;
}
-grub_efi_boolean_t
-grub_efi_secure_boot (void)
-{
- grub_efi_guid_t efi_var_guid = GRUB_EFI_GLOBAL_VARIABLE_GUID;
- grub_size_t datasize;
- char *secure_boot = NULL;
- char *setup_mode = NULL;
- grub_efi_boolean_t ret = 0;
-
- secure_boot = grub_efi_get_variable("SecureBoot", &efi_var_guid, &datasize);
-
- if (datasize != 1 || !secure_boot)
- goto out;
-
- setup_mode = grub_efi_get_variable("SetupMode", &efi_var_guid, &datasize);
-
- if (datasize != 1 || !setup_mode)
- goto out;
-
- if (*secure_boot && !*setup_mode)
- ret = 1;
-
- out:
- grub_free (secure_boot);
- grub_free (setup_mode);
- return ret;
-}
-
#pragma GCC diagnostic ignored "-Wcast-align"
/* Search the mods section from the PE32/PE32+ image. This code uses
diff --git a/grub-core/kern/efi/sb.c b/grub-core/kern/efi/sb.c
new file mode 100644
index 000000000..a41b6c5b8
--- /dev/null
+++ b/grub-core/kern/efi/sb.c
@@ -0,0 +1,58 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2014 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <grub/types.h>
+#include <grub/cpu/linux.h>
+#include <grub/efi/efi.h>
+#include <grub/efi/pe32.h>
+#include <grub/efi/linux.h>
+#include <grub/efi/sb.h>
+
+int
+grub_efi_secure_boot (void)
+{
+#ifdef GRUB_MACHINE_EFI
+ grub_efi_guid_t efi_var_guid = GRUB_EFI_GLOBAL_VARIABLE_GUID;
+ grub_size_t datasize;
+ char *secure_boot = NULL;
+ char *setup_mode = NULL;
+ grub_efi_boolean_t ret = 0;
+
+ secure_boot = grub_efi_get_variable("SecureBoot", &efi_var_guid, &datasize);
+
+ if (datasize != 1 || !secure_boot)
+ goto out;
+
+ setup_mode = grub_efi_get_variable("SetupMode", &efi_var_guid, &datasize);
+
+ if (datasize != 1 || !setup_mode)
+ goto out;
+
+ if (*secure_boot && !*setup_mode)
+ ret = 1;
+
+ out:
+ grub_free (secure_boot);
+ grub_free (setup_mode);
+ return ret;
+#else
+ return 0;
+#endif
+}
diff --git a/grub-core/loader/efi/appleloader.c b/grub-core/loader/efi/appleloader.c
index 74888c463..69c2a10d3 100644
--- a/grub-core/loader/efi/appleloader.c
+++ b/grub-core/loader/efi/appleloader.c
@@ -24,6 +24,7 @@
#include <grub/misc.h>
#include <grub/efi/api.h>
#include <grub/efi/efi.h>
+#include <grub/efi/sb.h>
#include <grub/command.h>
#include <grub/i18n.h>
@@ -227,6 +228,9 @@ static grub_command_t cmd;
GRUB_MOD_INIT(appleloader)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd = grub_register_command ("appleloader", grub_cmd_appleloader,
N_("[OPTS]"),
/* TRANSLATORS: This command is used on EFI to
@@ -238,5 +242,8 @@ GRUB_MOD_INIT(appleloader)
GRUB_MOD_FINI(appleloader)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_command (cmd);
}
diff --git a/grub-core/loader/efi/chainloader.c b/grub-core/loader/efi/chainloader.c
index 7196d4d2d..b88e374c2 100644
--- a/grub-core/loader/efi/chainloader.c
+++ b/grub-core/loader/efi/chainloader.c
@@ -34,6 +34,7 @@
#include <grub/efi/disk.h>
#include <grub/efi/pe32.h>
#include <grub/efi/linux.h>
+#include <grub/efi/sb.h>
#include <grub/command.h>
#include <grub/i18n.h>
#include <grub/net.h>
diff --git a/grub-core/loader/i386/bsd.c b/grub-core/loader/i386/bsd.c
index 7f96515da..87709aa23 100644
--- a/grub-core/loader/i386/bsd.c
+++ b/grub-core/loader/i386/bsd.c
@@ -38,6 +38,7 @@
#ifdef GRUB_MACHINE_PCBIOS
#include <grub/machine/int.h>
#endif
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -2124,6 +2125,9 @@ static grub_command_t cmd_netbsd_module_elf, cmd_openbsd_ramdisk;
GRUB_MOD_INIT (bsd)
{
+ if (grub_efi_secure_boot())
+ return;
+
/* Net and OpenBSD kernels are often compressed. */
grub_dl_load ("gzio");
@@ -2163,6 +2167,9 @@ GRUB_MOD_INIT (bsd)
GRUB_MOD_FINI (bsd)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_extcmd (cmd_freebsd);
grub_unregister_extcmd (cmd_openbsd);
grub_unregister_extcmd (cmd_netbsd);
diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index 083f9417c..b2438547d 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -35,6 +35,7 @@
#include <grub/i18n.h>
#include <grub/lib/cmdline.h>
#include <grub/linux.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -1139,6 +1140,9 @@ static grub_command_t cmd_linux, cmd_initrd;
GRUB_MOD_INIT(linux)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_linux = grub_register_command ("linux", grub_cmd_linux,
0, N_("Load Linux."));
cmd_initrd = grub_register_command ("initrd", grub_cmd_initrd,
@@ -1148,6 +1152,9 @@ GRUB_MOD_INIT(linux)
GRUB_MOD_FINI(linux)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_command (cmd_linux);
grub_unregister_command (cmd_initrd);
}
diff --git a/grub-core/loader/i386/pc/linux.c b/grub-core/loader/i386/pc/linux.c
index a293b17aa..91283157e 100644
--- a/grub-core/loader/i386/pc/linux.c
+++ b/grub-core/loader/i386/pc/linux.c
@@ -35,6 +35,7 @@
#include <grub/i386/floppy.h>
#include <grub/lib/cmdline.h>
#include <grub/linux.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -472,6 +473,9 @@ static grub_command_t cmd_linux, cmd_initrd;
GRUB_MOD_INIT(linux16)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_linux =
grub_register_command ("linux16", grub_cmd_linux,
0, N_("Load Linux."));
@@ -483,6 +487,9 @@ GRUB_MOD_INIT(linux16)
GRUB_MOD_FINI(linux16)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_command (cmd_linux);
grub_unregister_command (cmd_initrd);
}
diff --git a/grub-core/loader/multiboot.c b/grub-core/loader/multiboot.c
index 40c67e824..26df46a41 100644
--- a/grub-core/loader/multiboot.c
+++ b/grub-core/loader/multiboot.c
@@ -50,6 +50,7 @@
#include <grub/video.h>
#include <grub/memory.h>
#include <grub/i18n.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -446,6 +447,9 @@ static grub_command_t cmd_multiboot, cmd_module;
GRUB_MOD_INIT(multiboot)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_multiboot =
#ifdef GRUB_USE_MULTIBOOT2
grub_register_command ("multiboot2", grub_cmd_multiboot,
@@ -466,6 +470,9 @@ GRUB_MOD_INIT(multiboot)
GRUB_MOD_FINI(multiboot)
{
+ if (grub_efi_secure_boot())
+ return;
+
grub_unregister_command (cmd_multiboot);
grub_unregister_command (cmd_module);
}
diff --git a/grub-core/loader/xnu.c b/grub-core/loader/xnu.c
index c9885b1bc..df8dfdb4b 100644
--- a/grub-core/loader/xnu.c
+++ b/grub-core/loader/xnu.c
@@ -33,6 +33,7 @@
#include <grub/extcmd.h>
#include <grub/env.h>
#include <grub/i18n.h>
+#include <grub/efi/sb.h>
GRUB_MOD_LICENSE ("GPLv3+");
@@ -1469,6 +1470,9 @@ static grub_extcmd_t cmd_splash;
GRUB_MOD_INIT(xnu)
{
+ if (grub_efi_secure_boot())
+ return;
+
cmd_kernel = grub_register_command ("xnu_kernel", grub_cmd_xnu_kernel, 0,
N_("Load XNU image."));
cmd_kernel64 = grub_register_command ("xnu_kernel64", grub_cmd_xnu_kernel64,
@@ -1509,6 +1513,9 @@ GRUB_MOD_INIT(xnu)
GRUB_MOD_FINI(xnu)
{
+ if (grub_efi_secure_boot())
+ return;
+
#ifndef GRUB_MACHINE_EMU
grub_unregister_command (cmd_resume);
#endif
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index 72283ee99..926544afe 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -89,7 +89,6 @@ EXPORT_FUNC (grub_efi_set_variable) (const char *var,
const grub_efi_guid_t *guid,
void *data,
grub_size_t datasize);
-grub_efi_boolean_t EXPORT_FUNC (grub_efi_secure_boot) (void);
int
EXPORT_FUNC (grub_efi_compare_device_paths) (const grub_efi_device_path_t *dp1,
const grub_efi_device_path_t *dp2);
diff --git a/include/grub/efi/sb.h b/include/grub/efi/sb.h
new file mode 100644
index 000000000..9629fbb0f
--- /dev/null
+++ b/include/grub/efi/sb.h
@@ -0,0 +1,29 @@
+/* sb.h - declare functions for EFI Secure Boot support */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GRUB_EFI_SB_HEADER
+#define GRUB_EFI_SB_HEADER 1
+
+#include <grub/types.h>
+#include <grub/dl.h>
+
+/* Functions. */
+int EXPORT_FUNC (grub_efi_secure_boot) (void);
+
+#endif /* ! GRUB_EFI_SB_HEADER */
diff --git a/include/grub/ia64/linux.h b/include/grub/ia64/linux.h
new file mode 100644
index 000000000..e69de29bb
diff --git a/include/grub/mips/linux.h b/include/grub/mips/linux.h
new file mode 100644
index 000000000..e69de29bb
diff --git a/include/grub/powerpc/linux.h b/include/grub/powerpc/linux.h
new file mode 100644
index 000000000..e69de29bb
diff --git a/include/grub/sparc64/linux.h b/include/grub/sparc64/linux.h
new file mode 100644
index 000000000..e69de29bb
--
2.14.3
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