From 998946a136c2f2bbcef131b8ba8a69a8064516bb Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Wed, 25 Mar 2015 15:10:41 +0000 Subject: [PATCH] Initial commit. Largely based on supernested. --- .gitignore | 31 +++++ COPYING | 339 ++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile.am | 43 +++++++ README | 39 ++++++ build-appliance.sh.in | 69 ++++++++++ configure.ac | 84 +++++++++++++ editor.c | 80 ++++++++++++ init.in | 91 ++++++++++++++ run-test.sh.in | 66 ++++++++++ 9 files changed, 842 insertions(+) create mode 100644 .gitignore create mode 100644 COPYING create mode 100644 Makefile.am create mode 100644 README create mode 100644 build-appliance.sh.in create mode 100644 configure.ac create mode 100644 editor.c create mode 100644 init.in create mode 100644 run-test.sh.in diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..41751f7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,31 @@ +*~ +*.o + +.deps +Makefile.in +Makefile + +/aclocal.m4 +/autom4te.cache +/build-appliance.sh +/compile +/config.guess +/config.h +/config.h.in +/config.log +/config.status +/config.sub +/configure +/depcomp +/editor +/example-varstore +/example-varstore-edited +/init +/initrd +/install-sh +/kernel +/missing +/run-test.sh +/stamp-build +/stamp-h1 +/virt-efivars.qcow2 diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d159169 --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..3d6d219 --- /dev/null +++ b/Makefile.am @@ -0,0 +1,43 @@ +# virt-efivars Makefile.am +# (C) Copyright 2014-2015 Red Hat Inc. +# +# This program 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 2 of the License, or +# (at your option) any later version. +# +# This program 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 this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# +# Written by Richard W.M. Jones + +EXTRA_DIST = \ + COPYING \ + README + +CLEANFILES = \ + build-appliance.sh \ + kernel initrd virt-efivars.qcow2 \ + *-t \ + *~ + +noinst_DATA = kernel initrd virt-efivars.qcow2 + +kernel initrd virt-efivars.qcow2: stamp-build + +stamp-build: build-appliance.sh init editor + rm -f kernel initrd virt-efivars.qcow2 virt-efivars.qcow2-t + ./$< virt-efivars.qcow2-t + mv virt-efivars.qcow2-t virt-efivars.qcow2 + touch $@ + +noinst_PROGRAMS = editor +editor_SOURCES = editor.c +editor_CFLAGS = $(EFIVAR_CFLAGS) -Wall -Werror +editor_LDADD = $(EFIVAR_LIBS) diff --git a/README b/README new file mode 100644 index 0000000..9b0a688 --- /dev/null +++ b/README @@ -0,0 +1,39 @@ +An editor for EFI varstores. + +Authors: Richard W.M. Jones, with help from Laszlo Ersek & Peter Jones + +Copyright (C) 2015 Red Hat Inc. + +License: + - GPLv2+ + - See file `COPYING' for full details. + +Dependencies: + - bash + - supermin version >= 5 + - OVMF or AAVMF + - Peter Jones's libefivar (https://github.com/rhinstaller/efivar) + - qemu + +To use it: + +(1) autoreconf -i && ./configure && make + +This should build the appliance ('kernel', 'initrd', +'virt-efivars.qcow'). + +(2) Copy the varstore you want to edit to 'example-varstore'. + +(3) ./run-test.sh + +Note if it worked, it should print: + *** editor running *** + *** editor finished *** +If you don't see both those messages in the output, then likely +something is wrong. + +This will boot the appliance, and as a side-effect will run the editor +('editor.c') on the supplied varstore ('example-varstore' -> +'example-varstore-edited'). + +You might need to examine or edit run-test.sh.in first. diff --git a/build-appliance.sh.in b/build-appliance.sh.in new file mode 100644 index 0000000..cc93087 --- /dev/null +++ b/build-appliance.sh.in @@ -0,0 +1,69 @@ +#!/bin/bash - +# virt-efivars build script +# @configure_input@ +# (C) Copyright 2014-2015 Red Hat Inc. +# +# This program 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 2 of the License, or +# (at your option) any later version. +# +# This program 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 this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# +# Written by Richard W.M. Jones + +unset CDPATH +set -e + +supermin="@SUPERMIN@" +distro="@DISTRO@" + +output="$1" +if [ -z "$output" ]; then + echo "$0: do not run this script directly, use 'make'" + exit 1 +fi + +# Get the list of package names that are added to the appliance. +# Dependencies are resolved automatically by supermin. This is +# distro-specific. +if [[ "$distro" =~ ^fedora- ]]; then + packages=" + bash + coreutils + efivar-libs + systemd + util-linux + " +else + echo "$0: $distro not known." + echo "You need to edit '$0.in' to add support for this distro." + exit 1 +fi + +# Run the prepare step. +echo "Preparing the supermin appliance containing:" $packages +"$supermin" --prepare $packages -o tmp-supermin.d + +# Add the init script and editor binary. +tar cf tmp-supermin.d/init.tar init editor + +# Run the build step. +echo "Building the full appliance ..." +echo "If you see 'Permission denied' errors here, you can probably ignore" +echo "them, but encourage your distro to stop using security-through-obscurity." +"$supermin" --build --format ext2 tmp-supermin.d -o tmp-appliance.d + +# Copy out the kernel, initrd and disk image. +mv tmp-appliance.d/kernel . +mv tmp-appliance.d/initrd . +qemu-img convert -f raw tmp-appliance.d/root -O qcow2 "$output" + +rm -rf tmp-supermin.d tmp-appliance.d diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..1e4d469 --- /dev/null +++ b/configure.ac @@ -0,0 +1,84 @@ +dnl virt-efivars configure.ac +dnl (C) Copyright 2014-2015 Red Hat Inc. +dnl +dnl This program is free software; you can redistribute it and/or modify +dnl it under the terms of the GNU General Public License as published by +dnl the Free Software Foundation; either version 2 of the License, or +dnl (at your option) any later version. +dnl +dnl This program is distributed in the hope that it will be useful, +dnl but WITHOUT ANY WARRANTY; without even the implied warranty of +dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +dnl GNU General Public License for more details. +dnl +dnl You should have received a copy of the GNU General Public License +dnl along with this program; if not, write to the Free Software +dnl Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +dnl +dnl Written by Richard W.M. Jones + +AC_INIT([virt-efivars],[1.0]) +AM_INIT_AUTOMAKE(foreign) + +AC_PROG_CC + +AC_PROG_INSTALL + +AC_CANONICAL_HOST + +# Define $(SED). +m4_ifdef([AC_PROG_SED],[ + AC_PROG_SED +],[ + dnl ... else hope for the best + AC_SUBST([SED], "sed") +]) + +# Define $(AWK). +AC_PROG_AWK + +dnl Check for supermin 5. +AC_PATH_PROG(SUPERMIN,[supermin],[no]) + +if test "x$SUPERMIN" = "xno" ; then + AC_MSG_ERROR([supermin not found]) +fi + +if ! $SUPERMIN --version | grep -q 'supermin 5'; then + AC_MSG_ERROR([incorrect supermin version, must be supermin 5]) +fi + +dnl Get the distro that supermin thinks it is using. +AC_MSG_CHECKING([for the distro]) +DISTRO="$( + supermin --list-drivers | + $AWK '$2 == "detected" { gsub ("/", "-", $1); print $1; exit }' + )" +AC_MSG_RESULT([$DISTRO]) +AC_SUBST([DISTRO]) +if test -z "$DISTRO"; then + AC_MSG_ERROR([cannot get supermin distro from 'supermin --list-drivers' output]) +fi + +dnl Check for a usable qemu KVM binary. +qemu_system="$( + echo qemu-system-$host_cpu | + $SED -e 's/-i@<:@456@:>@86/-i386/g' \ + -e 's/-arm.*/-arm/g' + )" +qemu_choices="$qemu_system qemu-kvm kvm" +AC_PATH_PROGS([QEMU],[$qemu_choices],[no]) + +if test "x$QEMU" = "xno" ; then + AC_MSG_ERROR([no qemu KVM binary found. I looked for one of: $qemu_choices]) +fi + +dnl Check for libefivar. +PKG_CHECK_MODULES([EFIVAR], [efivar]) + +AC_CONFIG_HEADERS([config.h]) +AC_CONFIG_FILES([build-appliance.sh], [chmod +x,-w build-appliance.sh]) +AC_CONFIG_FILES([init], [chmod +x,-w init]) +AC_CONFIG_FILES([run-test.sh], [chmod +x,-w run-test.sh]) +AC_CONFIG_FILES([Makefile]) +AC_OUTPUT diff --git a/editor.c b/editor.c new file mode 100644 index 0000000..34d23de --- /dev/null +++ b/editor.c @@ -0,0 +1,80 @@ +/* virt-efivars editor. + * Copyright (C) 2015 Red Hat Inc. + * + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include + +#include +#include +#include +#include + +#include + +#define GUID_FORMAT "%08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x" + +static void +list_variables (void) +{ + efi_guid_t *guid = NULL; + char *name = NULL; + int r; + + while ((r = efi_get_next_variable_name (&guid, &name)) > 0) + printf (GUID_FORMAT "-%s\n", + guid->a, guid->b, guid->c, bswap_16 (guid->d), + guid->e[0], guid->e[1], guid->e[2], guid->e[3], + guid->e[4], guid->e[5], name); + + if (r < 0) { + perror ("efi_get_next_variable_name"); + exit (EXIT_FAILURE); + } +} + +static void +add_variable (void) +{ + uint8_t data[] = "rwmjtestdata"; + + if (efi_set_variable (efi_guid_redhat, "RWMJTest", + data, sizeof data, + EFI_VARIABLE_BOOTSERVICE_ACCESS | + EFI_VARIABLE_RUNTIME_ACCESS | + EFI_VARIABLE_NON_VOLATILE) < 0) { + perror ("efi_set_variable"); + exit (EXIT_FAILURE); + } +} + +int +main (int argc, char *argv[]) +{ + printf ("*** editor running ***\n"); + + if (!efi_variables_supported ()) { + fprintf (stderr, "UEFI variables are not supported!\n"); + exit (EXIT_FAILURE); + } + + list_variables (); + + add_variable (); + + printf ("*** editor finished ***\n"); + exit (EXIT_SUCCESS); +} diff --git a/init.in b/init.in new file mode 100644 index 0000000..712cff0 --- /dev/null +++ b/init.in @@ -0,0 +1,91 @@ +#!/bin/bash - +# virt-efivars init script +# @configure_input@ +# (C) Copyright 2014-2015 Red Hat Inc. +# +# This program 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 2 of the License, or +# (at your option) any later version. +# +# This program 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 this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# +# Written by Richard W.M. Jones + +echo "*** /init script starting up ***" + +export PATH=/sbin:/usr/sbin:/bin:/usr/bin + +# Create /proc, /sys, /run, /dev, /tmp, /var/tmp +if [ ! -d /proc ]; then rm -f /proc; fi +mkdir -p /proc +mount -t proc /proc /proc +if [ ! -d /sys ]; then rm -f /sys; fi +mkdir -p /sys +mount -t sysfs /sys /sys +mkdir -p /run +mount -t tmpfs -o "nosuid,size=20%,mode=0755" tmpfs /run +mkdir -p /run/lock +ln -s ../run/lock /var/lock +mount -t devtmpfs /dev /dev +mkdir -p /tmp +mount -t tmpfs tmpfs /tmp +mkdir -p /var/tmp +mount -t tmpfs tmpfs /var/tmp + +# Find and start udev. +for f in /sbin/udevd /lib/udev/udevd \ + /lib/systemd/systemd-udevd /usr/lib/systemd/systemd-udevd \ + /usr/lib/udev/udevd; do + if [ -x "$f" ]; then UDEVD="$f"; fi +done +if [ -z "$UDEVD" ]; then + echo "udev not found! Things will probably not work ..." +fi +$UDEVD --daemon +udevadm trigger +udevadm settle --timeout=600 + +# Set up kmod static-nodes (RHBZ#1011907). +mkdir -p /run/tmpfiles.d +kmod static-nodes --format=tmpfiles --output=/run/tmpfiles.d/kmod.conf + +# Set up tmpfiles (must run after kmod.conf is created above). +systemd-tmpfiles --prefix=/dev --create + +# libiscsi puts itself in a non-standard directory. +/sbin/ldconfig + +# Print some information about the system. +echo "/proc/cpuinfo ------------------------------" +cat /proc/cpuinfo +echo "--------------------------------------------" +echo + +echo -n "cmdline: " +cat /proc/cmdline + +echo -n "clocksource: " +cat /sys/devices/system/clocksource/clocksource0/current_clocksource + +echo -n "kernel: " +uname -r + +# ls -lR /dev +# cat /proc/mounts +# lsmod + +# Run the efivars editor binary. +./editor + +# Exit and reboot. +# qemu has the -no-reboot flag, so issuing a reboot here actually +# causes qemu to exit gracefully. +reboot -f diff --git a/run-test.sh.in b/run-test.sh.in new file mode 100644 index 0000000..7b29770 --- /dev/null +++ b/run-test.sh.in @@ -0,0 +1,66 @@ +#!/bin/bash - +# virt-efivars test script +# @configure_input@ +# (C) Copyright 2014-2015 Red Hat Inc. +# +# This program 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 2 of the License, or +# (at your option) any later version. +# +# This program 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 this program; if not, write to the Free Software +# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +# +# Written by Richard W.M. Jones + +unset CDPATH +set -e + +qemu="@QEMU@" + +varstore="example-varstore" +output="example-varstore-edited" +cp "$varstore" "$output" + +console="console=ttyS0" +mach= +extra_args= +scsi=virtio-scsi-pci +case `uname -m` in + aarch64) + uefi_code=/usr/share/AAVMF/AAVMF_CODE.fd + console="console=ttyAMA0" + mach="-M virt -cpu cortex-a57" + scsi=virtio-scsi-device + ;; + i?86|x86_64) + uefi_code=/usr/share/OVMF/OVMF_CODE.fd + extra_args="-device sga" + ;; + *) +esac + +set -x + +"$qemu" \ + -nodefaults \ + -nographic \ + $mach \ + -m 1024 \ + -no-reboot \ + -kernel kernel \ + -initrd initrd \ + -append "$console" \ + -drive if=pflash,format=raw,file=$uefi_code,readonly \ + -drive if=pflash,format=raw,file=$output \ + -device $scsi,id=scsi \ + -drive file=virt-efivars.qcow2,snapshot=on,cache=unsafe,format=qcow2,if=none,id=hd0 \ + -device scsi-hd,drive=hd0 \ + -serial stdio \ + $extra_args -- 1.8.3.1