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File kernel-install-tools-0.2.6.obscpio of Package kernel-install-tools
07070100000000000081A4000000000000000000000001612BCF2200000009000000000000000000000000000000000000002600000000kernel-install-tools-0.2.6/.gitignore*.pem *~ 07070100000001000081A4000000000000000000000001612BCF2200004643000000000000000000000000000000000000002300000000kernel-install-tools-0.2.6/COPYING 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. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. 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If this is what you want to do, use the GNU Lesser General Public License instead of this License. 07070100000002000081A4000000000000000000000001612BCF2200000193000000000000000000000000000000000000002400000000kernel-install-tools-0.2.6/MakefileSCRIPTS = sbtool-enroll-key sbtool-genkey sbtool-sign-kernel installkernel install: $(SCRIPTS) install -D -m 755 sbtool-genkey \ $(DESTDIR)/usr/bin/sbtool-genkey install -D -m 755 sbtool-enroll-key \ $(DESTDIR)/usr/sbin/sbtool-enroll-key install -D -m 755 sbtool-sign-kernel \ $(DESTDIR)/usr/bin/sbtool-sign-kernel install -D -m 755 installkernel \ $(DESTDIR)/usr/sbin/installkernel 07070100000003000081A4000000000000000000000001612BCF220000113A000000000000000000000000000000000000002500000000kernel-install-tools-0.2.6/README.md# Kernel Installation Tools This project contains a few useful scripts to be used primarily by users building their own kernels outside of their distribution's package management system. Most distributions that enable kernels for UEFI Secure Boot have support for it integrated into the build rules for their kernel packages but these rules tend to be either inaccessible for direct use or overly complicated for the simple case of building a kernel for use only on local systems. ## Dependencies In order to operate properly, this tool has some dependencies on other tools: * `openssl` * `pesign` * `certutil` * `pk12util` On SLE/OpenSUSE, these tools can be found in the `openssl`, `pesign`, and `mozilla-nss-tools` packages. ## sbtool-keygen `sbtool-keygen` is used to generate a key suitable for use in signing kernel modules *and* signing the kernel itself. Typical usage: $ sbtool-keygen /path/to/certificate The only required argument is the path to the certificate. Unless otherwise specified, the following defaults will be used: * Hash: sha256 * Email: `$USER@$(hostname -f)` * Common Name (CN): `$NAME`'s Secure Boot Signkey * `$NAME` is taken from the `getent passwd` output for the current user The `-f|--force` option can be used to allow overwriting the certificate if the file already exists. The `-H|--hash` option can be used to specify an alternate hash. The `-e|--email` option can be used to specify a different email address. The `-c|--common-name` option can be used to specify a different CN. ## sbtool-sign-kernel `sbtool-sign-kernel` is used to prepare the kernel for use in a Secure Boot environment. It performs several checks to ensure the signing key is appropriately configured, signs the kernel, and writes it to the destination. Typical usage: # sbtool-sign-kernel -e arch/x86/boot/bzImage /boot/vmlinuz-5.14-kvmsmall /path/to/certificate The paths to the input and output files are the only required arguments. If the path to the certificate is omited, the tool will attempt to locate it via the `CONFIG_MODULE_SIG_KEY` kernel configuration option. The current working directory and the directory hierarchy where the source kernel is located will be checked for the presence of a `.config` file. The `-e|--enroll` option is used to automatically call `sbtool-enroll-key` to queue the public component of the signing key for enrollment with the system MOK. Root privileges are required to copy the certificate into place and to queue it for enrollment. The `-q|--quiet ` option may be used to perform the operations silently unless there are fatal errors. Missing dependencies will cause the tool to exit successfully. ## sbtool-enroll-key `sbtool-enroll-key` is used to queue the public component of the signing key for enrollment in the system MOK (Machine Owner Key) database at next reboot. The EFI shim will prompt for a password. The root password active when the tool was invoked will be used. If the key is already enrolled or queued for enrollment, the tool exits successfully. A copy of the certificate will be installed into /etc/uefi/certs/ using the short fingerprint of the certificate as the file name. Typical usage: # sbtool-enroll-key /path/to/certificate The `-q|--quiet ` option may be used to perform the operations silently unless there are fatal errors. Missing dependencies will cause the tool to exit successfully. ## installkernel `/sbin/installkernel` is used by the kernel build system during `make install` to copy the kernel and other files into place, generate the initramfs, and update the bootloader with the new kernel. If `sbtool-sign-kernel` is available, it will be invoked to sign the kernel using the key used to sign the modules for the kernel being installed. It is called with the `-q` and -`e` options. If the kernel cannot be signed for any reason, the kernel is copied into place instead. It is important to note that while the kernel build environment will create a key for itself to sign its own modules if none is provided, the configuration of that key is insufficient for signing the kernel for use with Secure Boot and it will not be used. If the signing key is available and suitable, the automatic invocation of `sbtool-sign-kernel -q -e` means that the process of installing a kernel that works with Secure Boot should involve no additional effort beyond copying the key into place. 07070100000004000081ED000000000000000000000001612BCF2200001021000000000000000000000000000000000000002900000000kernel-install-tools-0.2.6/installkernel#! /bin/sh # # /sbin/installkernel - written by tyson@rwii.com # # May 21, 2003 - agruen@suse.de # * Adapted for SuSE and cleaned up. # # This file is kept in the following CVS repository: # # $Source: /suse/yast2/cvsroot/mkinitrd/installkernel,v $ # $Revision: 1.8 $ # : ${INSTALL_PATH:=/boot} KERNEL_VERSION=$1 BOOTIMAGE=$2 MAPFILE=$3 CONFIGFILE=config-$KERNEL_VERSION case "$(uname -m)" in s390|s390x) BOOTFILE=image ;; ppc*) BOOTFILE=vmlinux ;; aarch64) BOOTFILE=Image ;; armv*) BOOTFILE=zImage ;; *) BOOTFILE=vmlinuz ;; esac # # Move away files from versions up to SuSE Linux 8.2 # if [ -f $INSTALL_PATH/$BOOTFILE -a ! -L $INSTALL_PATH/$BOOTFILE ]; then mv $INSTALL_PATH/$BOOTFILE $INSTALL_PATH/$BOOTFILE.old fi if [ -L $INSTALL_PATH/System.map ]; then rm -f $INSTALL_PATH/System.map elif [ -f $INSTALLPATH/System.map ]; then mv $INSTALL_PATH/System.map $INSTALL_PATH/System.map.old fi # # Move away files from after SuSE Linux 8.2 # if [ -f $INSTALL_PATH/$BOOTFILE-$KERNEL_VERSION ]; then mv $INSTALL_PATH/$BOOTFILE-$KERNEL_VERSION \ $INSTALL_PATH/$BOOTFILE-$KERNEL_VERSION.old fi if [ -f $INSTALL_PATH/System.map-$KERNEL_VERSION ]; then mv $INSTALL_PATH/System.map-$KERNEL_VERSION \ $INSTALL_PATH/System.map-$KERNEL_VERSION.old fi if [ -f .config ] && [ -f $INSTALL_PATH/$CONFIGFILE ]; then mv -v $INSTALL_PATH/$CONFIGFILE \ $INSTALL_PATH/$CONFIGFILE.old fi # # Install new files # # # Sign the kernel for Secure Boot if possible, otherwise simply copy it # kernel_needs_copy=true INSTALLED_KERNEL="$INSTALL_PATH/$BOOTFILE-$KERNEL_VERSION" if [ -x /usr/bin/sbtool-sign-kernel ]; then if /usr/bin/sbtool-sign-kernel -q -e $BOOTIMAGE $INSTALLED_KERNEL; then kernel_needs_copy=false fi fi if $kernel_needs_copy; then cp -fp $BOOTIMAGE $INSTALLED_KERNEL fi cp -fp $MAPFILE $INSTALL_PATH/System.map-$KERNEL_VERSION [ -f .config ] && cp -fp .config $INSTALL_PATH/$CONFIGFILE # If the kernel has module support, recreate modules.dep using depmod # since the contents of modules.dep do not have a consistent format across # releases. if [ -x /sbin/depmod -a -d /lib/modules/$KERNEL_VERSION ]; then /sbin/depmod $KERNEL_VERSION fi function check_supported() { local MOD_SUPP_FILE="/etc/modprobe.d/10-unsupported-modules.conf" local MOD_SUPP_REGEX="^\s*allow_unsupported_modules\s+0\s*$" local cfg="$1" if [ ! -e "$cfg" ]; then return; fi local tmp=$(modprobe --showconfig | grep -Eq $MOD_SUPP_REGEX) if [ -n "$tmp" ]; then CHECK_SUPPORTED="--check-supported" return fi if grep -q "^CONFIG_SUSE_KERNEL_SUPPORTED=y" $cfg ; then if [ -e $MOD_SUPP_FILE ] && grep -Eq $MOD_SUPP_REGEX $MOD_SUPP_FILE; then CHECK_SUPPORTED="--check-supported" fi fi } CONFIG=$(dirname $MAPFILE)/.config CHECK_SUPPORTED= check_supported $CONFIG KERNTYPES=$(dirname $MAPFILE)/init/kerntypes.o if [ -e $KERNTYPES ]; then cp -fp $KERNTYPES $INSTALL_PATH/Kerntypes-$KERNEL_VERSION fi case "$(uname -m)" in i?86 | x86_64) KERNBIN=$(dirname $MAPFILE)/vmlinux if [ -e $KERNBIN ]; then if [ -f $INSTALL_PATH/vmlinux-$KERNEL_VERSION.gz ]; then mv $INSTALL_PATH/vmlinux-$KERNEL_VERSION.gz \ $INSTALL_PATH/vmlinux-$KERNEL_VERSION.gz.old fi gzip -c $KERNBIN > $INSTALL_PATH/vmlinux-$KERNEL_VERSION.gz fi ;; esac # # Generate initial ramdisk # if [ -x /usr/bin/dracut -a -d /lib/modules/$KERNEL_VERSION ]; then /usr/bin/dracut --hostonly --force $CHECK_SUPPORTED \ $INSTALL_PATH/initrd-$KERNEL_VERSION $KERNEL_VERSION else echo "You may need to create an initial ramdisk now." fi # # Update boot loader # if [ -x /sbin/update-bootloader ]; then opt_initrd= [ -e $INSTALL_PATH/initrd-$KERNEL_VERSION ] \ && opt_initrd="--initrd $INSTALL_PATH/initrd-$KERNEL_VERSION" /sbin/update-bootloader --name $KERNEL_VERSION \ --image $INSTALL_PATH/$BOOTFILE-$KERNEL_VERSION \ $opt_initrd --add --force fi 07070100000005000081A4000000000000000000000001612BCF2200000699000000000000000000000000000000000000003500000000kernel-install-tools-0.2.6/kernel-install-tools.spec# # spec file for package kernel-install-tools # # Copyright (c) 2021 SUSE LLC # # All modifications and additions to the file contributed by third parties # remain the property of their copyright owners, unless otherwise agreed # upon. The license for this file, and modifications and additions to the # file, is the same license as for the pristine package itself (unless the # license for the pristine package is not an Open Source License, in which # case the license is the MIT License). An "Open Source License" is a # license that conforms to the Open Source Definition (Version 1.9) # published by the Open Source Initiative. # Please submit bugfixes or comments via https://bugs.opensuse.org/ # Name: kernel-install-tools Version: 0.1 Release: 0 Summary: Useful tools for installing self-built kernels Group: Development/Tools/Other License: GPL-2.0 URL: https://github.com/jeffmahoney/kernel-install-tools Source: %{name}-%{version}.tar.xz Requires: openssl Requires: pesign Requires: mozilla-nss-tools BuildArch: noarch %description A collection of tools useful for installing self-built kernels. In addition to the baseline /sbin/installkernel, this package includes several tools for properly signing and installing kernels and certificates for use on systems with UEFI Secure Boot enabled. %prep %setup -q %build %install %make_install %post if ! test -L /sbin; then ln -sf ../usr/sbin/installkernel /sbin/installkernel fi %files %license COPYING %doc README.md %{_bindir}/sbtool-genkey %{_bindir}/sbtool-sign-kernel %{_sbindir}/sbtool-enroll-key %{_sbindir}/installkernel %ghost /sbin/installkernel %changelog 07070100000006000081ED000000000000000000000001612BCF2200000CB8000000000000000000000000000000000000002D00000000kernel-install-tools-0.2.6/sbtool-enroll-key#!/bin/bash set -e progname="$(basename "$0")" error() { echo "$@" >&2 exit 1 } quiet_message() { $QUIET || echo "$@" } quiet_error() { quiet_message "$@" >&2 exit 1 } _usage() { cat <<END $progname [options] /path/to/certificate This script will copy the public component of the kernel signing key to /etc/uefi/certs and queue it for enrollment in the system MOK. If the certificate is already enrolled, it will be skipped and the script will exit with success. If the system does not support UEFI Secure Boot, it will be skipped and the script will exit with retval=2. options: -q|--quiet: do not report errors for missing dependencies, if the certificate is already enrolled, or if it will be skipped -h|--help: display this message END } help() { _usage exit 0 } usage() { _usage >&2 exit 1 } check_commands() { for command in "$@"; do if ! command -v "$command" > /dev/null; then if ! $QUIET; then error "$command is missing" else exit 1 fi fi done } filter_fingerprints() { grep 'SHA1 Fingerprint' | sed -e 's/SHA1 Fingerprint.//' | \ tr -d ' :' | tr a-z A-Z } cert_fingerprint() { openssl x509 -inform PEM -fingerprint -noout -in "$1" | filter_fingerprints } enrolled_fingerprints() { mokutil --list-enrolled | filter_fingerprints mokutil --list-new | filter_fingerprints } options=$(getopt -o qh --long quiet,help -- "$@") eval set -- $options QUIET=false while true; do case "$1" in -q|--quiet) QUIET=true ;; -h|--help) help ;; --) shift break ;; *) usage ;; esac shift done # It's typical for systems without UEFI to not have mokutil installed, so # check for UEFI variable support manually. The user shouldn't need to # install mokutil only to discover it would fail anyway. if ! test -d /sys/firmware/efi/efivars; then quiet_message "This system does not use UEFI Secure Boot functionality." quiet_message "Exiting." exit 2 fi check_commands openssl mokutil CERT=$1 if test -z "$CERT"; then error "error: No certificate specified." fi if test "$EUID" != 0; then error "This tool must be run as root." fi fingerprint=$(cert_fingerprint "$CERT") fingerprint8=$(echo $fingerprint | cut -b 1-8) if test -z "$fingerprint8"; then error "Failed to parse fingerprint from $CERT" fi for enrolled in $(enrolled_fingerprints); do if test "$enrolled" = "$fingerprint"; then quiet_message "Signing key $fingerprint8 already enrolled or pending." exit 0 fi done if test "$EUID" -ne 0; then error "Root privileges are required to queue $CERT for enrollment on reboot." fi mkdir -p /etc/uefi/certs # FIXME: Should handle collisions if ! openssl x509 -inform PEM -in "$CERT" -outform DER \ -out "/etc/uefi/certs/$fingerprint8.crt"; then error "Failed to convert ${CERT} to DER format for import." fi if ! mokutil --import "/etc/uefi/certs/$fingerprint8.crt" --root-pw; then error "Failed to queue certificate for enrollment." fi quiet_message "Secure Boot certificate queued for enrollment on reboot." 07070100000007000081ED000000000000000000000001612BCF2200000B49000000000000000000000000000000000000002900000000kernel-install-tools-0.2.6/sbtool-genkey#!/bin/bash set -e progname=$(basename "$0") cleanup() { test -n "$genkey" && rm -f "$genkey" } default_common_name() { name=$(getent passwd $USER|cut -d : -f 5|cut -d, -f 1) if test -z "$name"; then name="$USER" fi echo "${name}'s Secure Boot Signkey" } CN=$(default_common_name) EMAIL="${USER}@$(hostname -f)" HASH=sha256 _usage() { cat <<END $progname [options ...] /path/to/certificate options: -h|--help: This message -H|--hash <hash>: Specify which hash to use in the key (default: sha256) -f|--force: Force overwrite of existing certificate and ignore warnings about mismatched hashes. -e|--email: Email address to associate with the key (default: $EMAIL) -c|--common-name: Common Name to associate with the key. (default: $CN) END } warn() { echo "$@" 1>&2 } error() { warn "$@" exit 1 } help() { cat <<END $progname will generate an x509 key suitable for use in signing kernel binaries and modules. It will also generate a certificate suitable for use by UEFI Secure Boot to validate the kernel and modules at boot time. END _usage exit 0 } usage() { _usage 1>&2 exit 1 } options=$(getopt -o H:hfc:e: --long hash:,help,force,email:,common-name: -- "$@") if test $? -ne 0; then usage fi eval set -- $options FORCE=false while true; do case "$1" in -H|--hash) HASH=$2 shift ;; -f|--force) FORCE=true ;; -h|--help) help ;; -c|--common-name) CN=$2 shift ;; -e|--email) EMAIL=$2 shift ;; --) shift break ;; *) usage ;; esac shift done if test $# -eq 0; then echo "missing output file" usage fi OUTPUT=$1 if test -e "$OUTPUT" -a "$FORCE" = "false"; then error "$OUTPUT already exists. Overwrite with --force" fi if test -z "$CN"; then error "Emtpy CN is not valid." fi if test -z "$EMAIL"; then error "Empty email is not valid." fi if test -z "$HASH"; then error "Empty hash is not valid." fi trap cleanup EXIT genkey=$(mktemp /tmp/genkey.XXXXXX) # Notes on key usage: # Module signing requries digitalSignature # Secure Boot requires codeSigning cat << END > $genkey [ req ] default_bits = 2048 distinguished_name = req_distinguished_name prompt = no string_mask = utf8only x509_extensions = myexts [ req_distinguished_name ] CN = "${CN}" emailAddress = "${EMAIL}" [ myexts ] basicConstraints=critical,CA:FALSE subjectKeyIdentifier=hash authorityKeyIdentifier=keyid keyUsage=critical, digitalSignature extendedKeyUsage=codeSigning END if ! openssl req -new -nodes -utf8 -"$HASH" -days 36500 -batch -x509 \ -config "$genkey" -outform PEM -out "$OUTPUT" \ -keyout "$OUTPUT"; then error "Failed to generate signing key and certificate." fi 07070100000008000081ED000000000000000000000001612BCF22000014A9000000000000000000000000000000000000002E00000000kernel-install-tools-0.2.6/sbtool-sign-kernel#!/bin/bash set -e progname="$(basename "$0")" error() { echo "$@" >&2 exit 1 } quiet_message() { $QUIET || echo "$@" } quiet_error() { quiet_message "$@" >&2 exit 1 } _usage() { cat << END $progname [options] <source> <destination> [signing key] This script will prepare an unsigned kernel for use on a system with UEFI Secure Boot enabled. The kernel located at <source> will be signed using the signing key and written to <destination>. It will then register the public component of the signing key for enrollment in the system MOK if it is not already enrolled. If [signing key] is unspecified and the working directory is a kernel build directory, the signing key will be pulled from .config. If an autodetected signing key has been autogenerated by the kernel build process and Secure Boot is not enabled, enrollment will be skipped. This script has several exit values: 0 - success 1 - failure 2 - skipped - kernel not copied into place options: -q|--quiet: do not report errors for missing dependencies, just exit with error -e|--enroll: queue certificate for enrollment in system MOK. If the certificate is autodetected, sbtool-enroll-key -a will be used to skip enrollment of kernel-generated signing keys -f|--force: queue the certificate for enrollment even if it is kernel-generated and secure boot is disabled END } help() { _usage exit 0 } usage() { _usage >&2 exit 1 } check_commands() { for command in "$@"; do if ! command -v "$command" > /dev/null; then if ! $QUIET; then error "$command is missing" else exit 1 fi fi done } cert_subject_hash() { local cert=$1 openssl x509 -in $cert -noout -subject_hash } cert_kernel_generated() { local cert=$1 # Based on "CN = Build time autogenerated kernel key" # as defined in linux/certs/Makefile KERNEL_GENERATED_CERT_HASH=0926ef54 test "$(cert_subject_hash "$cert")" = "$KERNEL_GENERATED_CERT_HASH" } secure_boot_enabled() { mokutil --sb-state | grep -q "enabled" } options=$(getopt -o qhef --long quiet,help,enroll,force -- "$@") eval set -- $options QUIET=false ENROLL=false FORCE=false while true; do case "$1" in -q|--quiet) QUIET=true ;; -e|--enroll) ENROLL=true ;; -f|--force) FORCE=true ;; -h|--help) help ;; --) shift break ;; *) usage ;; esac shift done check_commands pesign pk12util certutil openssl UNSIGNED=$1 SIGNED=$2 CERT=$3 test -z "$UNSIGNED" -o -z "$SIGNED" && usage 1 test -f "$UNSIGNED" || error "$UNSIGNED does not exist." test -d "$(dirname "$SIGNED")" || error "Target directory for $SIGNED does not exist." read_cert_config() { sed -n '/^CONFIG_MODULE_SIG_KEY=/s///p' $1 |tr -d '"' } DETECTED_KEY=false FOUND_CONFIG=false if test -z "$CERT"; then for path in .config "$(dirname "$UNSIGNED")/.config"; do if test -e $path; then FOUND_CONFIG=true CERT=$(read_cert_config $path) if test -n "$CERT"; then DETECTED_KEY=true break fi fi done if test -z "$CERT"; then if $FOUND_CONFIG; then echo "Module signing not enabled for this kernel. Skipping." exit 2 else error "Couldn't autodetect signing key, no config found." fi elif ! test -f "$CERT"; then error "Certificate \"$CERT\" found in config but does not exist." fi fi cleanup() { test -n "$tmpdir" && rm -rf "$tmpdir" } trap cleanup EXIT tmpdir=$(mktemp -d /tmp/signkernel.XXXXXX) if ! openssl x509 -in $CERT -ext keyUsage,extendedKeyUsage -noout | \ grep -q "Code Signing"; then error "Certificate must have Code Signing extended key usage defined for Secure Boot." fi # certutil has no facility to import a private key directly, so we have to # use the pkcs12 interface instead. certutil_import_key() { local certdir=$1 local cert=$2 local P12="$tmpdir/cert.p12" uuidgen > $tmpdir/passwd openssl pkcs12 -export -password "file:$tmpdir/passwd" -inkey $cert \ -in $cert -name kernel-cert -out $P12 # pk12util has no silent mode if ! pk12util -w $tmpdir/passwd -d $certdir -i $P12 > $tmpdir/output; then cat $tmpdir/output exit 1 fi rm -f $tmpdir/passwd $P12 $tmpdir/output } certutil -N -d $tmpdir --empty-password certutil_import_key $tmpdir $CERT pesign -n $tmpdir -c kernel-cert -i $UNSIGNED -o $SIGNED -s --force echo "Signed $UNSIGNED with $CERT and installed to $SIGNED" $ENROLL || exit 0 if $QUIET; then ARGS="-q" fi if $DETECTED_KEY && ! $FORCE && \ cert_kernel_generated "$CERT" && ! secure_boot_enabled; then echo "Skipping enrollment of kernel-generated certificate on" \ "system without Secure Boot enabled." quiet_message "Override with --force." echo "" exit 0 fi /usr/sbin/sbtool-enroll-key $ARGS $CERT ret=$? # Skipping enrollment doesn't mean we've skipped # signing and copying so return 0. if test $? -eq 2; then ret=0 fi exit $ret 07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!82 blocks
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