From f7574b40f89ded29d82e5cfdb7494f8884bc1cdb Mon Sep 17 00:00:00 2001
From: Robert Marshall <rmarshall@redhat.com>
Date: Thu, 25 Jun 2015 11:13:11 -0400
Subject: [PATCH 66/90] Add friendly grub2 password config tool (#985962)
Provided a tool for users to reset the grub2 root user password
without having to alter the grub.cfg. The hashed password now
lives in a root-only-readable configuration file.
Resolves: rhbz#985962
---
.gitignore | 1 +
Makefile.util.def | 13 +++++
configure.ac | 1 +
util/grub-mkconfig.in | 2 +
util/grub-setpassword.8 | 28 +++++++++++
util/grub-setpassword.in | 123 +++++++++++++++++++++++++++++++++++++++++++++++
util/grub.d/01_users.in | 11 +++++
7 files changed, 179 insertions(+)
create mode 100644 util/grub-setpassword.8
create mode 100644 util/grub-setpassword.in
create mode 100644 util/grub.d/01_users.in
diff --git a/.gitignore b/.gitignore
index 7697877..53a391e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -127,6 +127,7 @@ grub-render-label
grub-rpm-sort
grub-script-check
grub-set-default
+grub-setpassword
grub-shell
grub-shell-tester
grub-sparc64-setup
diff --git a/Makefile.util.def b/Makefile.util.def
index d846b81..226c46b 100644
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -440,6 +440,12 @@ script = {
};
script = {
+ name = '01_users';
+ common = util/grub.d/01_users.in;
+ installdir = grubconf;
+};
+
+script = {
name = '10_windows';
common = util/grub.d/10_windows.in;
installdir = grubconf;
@@ -722,6 +728,13 @@ script = {
};
script = {
+ name = grub-setpassword;
+ common = util/grub-setpassword.in;
+ mansection = 8;
+ installdir = sbin;
+};
+
+script = {
name = grub-mkconfig_lib;
common = util/grub-mkconfig_lib.in;
installdir = noinst;
diff --git a/configure.ac b/configure.ac
index d5e8d90..67ff20c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -65,6 +65,7 @@ grub_TRANSFORM([grub-mkrelpath])
grub_TRANSFORM([grub-mkrescue])
grub_TRANSFORM([grub-probe])
grub_TRANSFORM([grub-reboot])
+grub_TRANSFORM([grub-setpassword])
grub_TRANSFORM([grub-rpm-sort])
grub_TRANSFORM([grub-script-check])
grub_TRANSFORM([grub-set-default])
diff --git a/util/grub-mkconfig.in b/util/grub-mkconfig.in
index 9d595ac..fb87247 100644
--- a/util/grub-mkconfig.in
+++ b/util/grub-mkconfig.in
@@ -263,6 +263,8 @@ for i in "${grub_mkconfig_dir}"/* ; do
*~) ;;
# emacsen autosave files. FIXME: support other editors
*/\#*\#) ;;
+ # rpm config files of yore.
+ *.rpmsave|*.rpmnew|*.rpmorig) ;;
*)
if grub_file_is_not_garbage "$i" && test -x "$i" ; then
echo
diff --git a/util/grub-setpassword.8 b/util/grub-setpassword.8
new file mode 100644
index 0000000..49200a8
--- /dev/null
+++ b/util/grub-setpassword.8
@@ -0,0 +1,28 @@
+.TH GRUB-SETPASSWORD 3 "Thu Jun 25 2015"
+.SH NAME
+\fBgrub-setpassword\fR \(em Generate the user.cfg file containing the hashed grub bootloader password.
+
+.SH SYNOPSIS
+\fBgrub-setpassword\fR [OPTION]
+
+.SH DESCRIPTION
+\fBgrub-setpassword\fR outputs the user.cfg file which contains the hashed GRUB bootloader password. This utility only supports configurations where there is a single root user.
+
+The file has the format:
+GRUB2_PASSWORD=<\fIhashed password\fR>.
+
+.SH OPTIONS
+.TP
+-h, --help
+Display program usage and exit.
+.TP
+-v, --version
+Display the current version.
+.TP
+-o, --output[=\fIDIRECTORY PATH\fR]
+Choose the file path to which user.cfg will be written.
+
+.SH SEE ALSO
+.BR "info grub"
+
+.BR "info grub2-mkpasswd-pbkdf2"
diff --git a/util/grub-setpassword.in b/util/grub-setpassword.in
new file mode 100644
index 0000000..dd76f00
--- /dev/null
+++ b/util/grub-setpassword.in
@@ -0,0 +1,123 @@
+#!/bin/sh -e
+
+if [ -d /sys/firmware/efi/efivars/ ]; then
+ grubdir=`echo "/@bootdirname@/efi/EFI/redhat/" | sed 's,//*,/,g'`
+else
+ grubdir=`echo "/@bootdirname@/@grubdirname@" | sed 's,//*,/,g'`
+fi
+
+PACKAGE_VERSION="@PACKAGE_VERSION@"
+PACKAGE_NAME="@PACKAGE_NAME@"
+self=`basename $0`
+bindir="@bindir@"
+grub_mkpasswd="${bindir}/@grub_mkpasswd_pbkdf2@"
+
+# Usage: usage
+# Print the usage.
+usage () {
+ cat <<EOF
+Usage: $0 [OPTION] [SOURCE]
+Run GRUB script in a Qemu instance.
+
+ -h, --help print this message and exit
+ -v, --version print the version information and exit
+ -o, --output_path choose a custom output path for user.cfg
+
+$0 prompts the user to set a password on the grub bootloader. The password
+is written to a file named user.cfg.
+
+Report bugs at https://bugzilla.redhat.com.
+EOF
+}
+
+argument () {
+ opt=$1
+ shift
+
+ if test $# -eq 0; then
+ gettext_printf "%s: option requires an argument -- \`%s'\n" "$self" "$opt" 1>&2
+ exit 1
+ fi
+ echo $1
+}
+
+# Ensure that it's the root user running this script
+if [ "${EUID}" -ne 0 ]; then
+ echo "The grub bootloader password may only be set by root."
+ usage
+ exit 2
+fi
+
+# Check the arguments.
+while test $# -gt 0
+do
+ option=$1
+ shift
+
+ case "$option" in
+ -h | --help)
+ usage
+ exit 0 ;;
+ -v | --version)
+ echo "$self (${PACKAGE_NAME}) ${PACKAGE_VERSION}"
+ exit 0 ;;
+ -o | --output)
+ OUTPUT_PATH=`argument $option "$@"`; shift ;;
+ --output=*)
+ OUTPUT_PATH=`echo "$option" | sed 's/--output=//'` ;;
+ -o=*)
+ OUTPUT_PATH=`echo "$option" | sed 's/-o=//'` ;;
+ esac
+done
+
+# set user input or default path for user.cfg file
+if [ -z "${OUTPUT_PATH}" ]; then
+ OUTPUT_PATH="${grubdir}"
+fi
+
+if [ ! -d "${OUTPUT_PATH}" ]; then
+ echo "${OUTPUT_PATH} does not exist."
+ usage
+ exit 2;
+fi
+
+ttyopt=$(stty -g)
+fixtty() {
+ stty ${ttyopt}
+}
+
+trap fixtty EXIT
+stty -echo
+
+# prompt & confirm new grub2 root user password
+echo -n "Enter password: "
+read PASSWORD
+echo
+echo -n "Confirm password: "
+read PASSWORD_CONFIRM
+echo
+stty ${ttyopt}
+
+getpass() {
+ local P0
+ local P1
+ P0="$1" && shift
+ P1="$1" && shift
+
+ ( echo ${P0} ; echo ${P1} ) | \
+ ${grub_mkpasswd} | \
+ grep -v '[eE]nter password:' | \
+ sed -e "s/PBKDF2 hash of your password is //"
+}
+
+MYPASS="$(getpass "${PASSWORD}" "${PASSWORD_CONFIRM}")"
+if [ -z "${MYPASS}" ]; then
+ echo "${self}: error: empty password" 1>&2
+ exit 1
+fi
+
+# on the ESP, these will fail to set the permissions, but it's okay because
+# the directory is protected.
+install -m 0600 /dev/null "${grubdir}/user.cfg" 2>/dev/null || :
+chmod 0600 "${grubdir}/user.cfg" 2>/dev/null || :
+echo "GRUB2_PASSWORD=${MYPASS}" > "${grubdir}/user.cfg"
diff --git a/util/grub.d/01_users.in b/util/grub.d/01_users.in
new file mode 100644
index 0000000..db2f44b
--- /dev/null
+++ b/util/grub.d/01_users.in
@@ -0,0 +1,11 @@
+#!/bin/sh -e
+cat << EOF
+if [ -f \${prefix}/user.cfg ]; then
+ source \${prefix}/user.cfg
+ if [ -n "\${GRUB2_PASSWORD}" ]; then
+ set superusers="root"
+ export superusers
+ password_pbkdf2 root \${GRUB2_PASSWORD}
+ fi
+fi
+EOF
--
2.9.3