mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-21 18:50:50 +01:00
454 lines
11 KiB
Bash
Executable File
454 lines
11 KiB
Bash
Executable File
#!/bin/sh
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#
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# Installs/updates the necessary boot blocks for the desired boot environment
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#
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# Lightly tested.. Intended to be installed, but until it matures, it will just
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# be a boot tool for regression testing.
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# insert code here to guess what you have -- yikes!
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# Minimum size of FAT filesystems, in KB.
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fat32min=65525
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fat16min=2100
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die() {
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echo $*
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exit 1
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}
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doit() {
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echo $*
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eval $*
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}
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find_part() {
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dev=$1
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part=$2
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gpart show $dev | tail +2 | awk '$4 == "'$part'" { print $3; }'
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}
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get_uefi_bootname() {
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case ${TARGET:-$(uname -m)} in
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amd64) echo bootx64 ;;
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arm64) echo bootaa64 ;;
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i386) echo bootia32 ;;
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arm) echo bootarm ;;
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riscv) echo bootriscv64 ;;
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*) die "machine type $(uname -m) doesn't support UEFI" ;;
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esac
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}
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make_esp_file() {
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local file sizekb device stagedir fatbits efibootname
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file=$1
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sizekb=$2
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if [ "$sizekb" -ge "$fat32min" ]; then
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fatbits=32
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elif [ "$sizekb" -ge "$fat16min" ]; then
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fatbits=16
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else
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fatbits=12
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fi
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stagedir=$(mktemp -d /tmp/stand-test.XXXXXX)
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mkdir -p "${stagedir}/EFI/BOOT"
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# Allow multiple files to be copied.
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# We do this in pairs, e.g:
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# make_esp_file ... loader1.efi bootx64 loader2.efi bootia32
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#
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# If the second argument is left out,
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# determine it automatically.
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shift; shift # Skip $file and $sizekb
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while [ ! -z $1 ]; do
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if [ ! -z $2 ]; then
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efibootname=$2
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else
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efibootname=$(get_uefi_bootname)
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fi
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cp "$1" "${stagedir}/EFI/BOOT/${efibootname}.efi"
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shift; shift || : # Ignore failure to shift
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done
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makefs -t msdos \
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-o fat_type=${fatbits} \
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-o sectors_per_cluster=1 \
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-o volume_label=EFISYS \
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-s ${sizekb}k \
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"${file}" "${stagedir}"
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rm -rf "${stagedir}"
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}
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make_esp_device() {
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local dev file dst mntpt fstype efibootname kbfree loadersize efibootfile
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local isboot1 existingbootentryloaderfile bootorder bootentry
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# ESP device node
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dev=$1
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file=$2
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# Allow caller to override the default
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if [ ! -z $3 ]; then
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efibootname=$3
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else
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efibootname=$(get_uefi_bootname)
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fi
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dst=$(basename ${file%.efi})
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mntpt=$(mktemp -d /tmp/stand-test.XXXXXX)
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# See if we're using an existing (formatted) ESP
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fstype=$(fstyp "${dev}")
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if [ "${fstype}" != "msdosfs" ]; then
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newfs_msdos -F 32 -c 1 -L EFISYS "${dev}" > /dev/null 2>&1
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fi
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mount -t msdosfs "${dev}" "${mntpt}"
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if [ $? -ne 0 ]; then
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die "Failed to mount ${dev} as an msdosfs filesystem"
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fi
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echo "Mounted ESP ${dev} on ${mntpt}"
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kbfree=$(df -k "${mntpt}" | tail -1 | cut -w -f 4)
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loadersize=$(stat -f %z "${file}")
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loadersize=$((loadersize / 1024))
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# Check if /EFI/BOOT/BOOTxx.EFI is the FreeBSD boot1.efi
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# If it is, remove it to avoid leaving stale files around
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efibootfile="${mntpt}/EFI/BOOT/${efibootname}.efi"
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if [ -f "${efibootfile}" ]; then
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isboot1=$(strings "${efibootfile}" | grep "FreeBSD EFI boot block")
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if [ -n "${isboot1}" ] && [ "$kbfree" -lt "${loadersize}" ]; then
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echo "Only ${kbfree}KB space remaining: removing old FreeBSD boot1.efi file /EFI/BOOT/${efibootname}.efi"
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rm "${efibootfile}"
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rmdir "${mntpt}/EFI/BOOT"
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else
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echo "${kbfree}KB space remaining on ESP: renaming old boot1.efi file /EFI/BOOT/${efibootname}.efi /EFI/BOOT/${efibootname}-old.efi"
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mv "${efibootfile}" "${mntpt}/EFI/BOOT/${efibootname}-old.efi"
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fi
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fi
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if [ ! -f "${mntpt}/EFI/freebsd/${dst}.efi" ] && [ "$kbfree" -lt "$loadersize" ]; then
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umount "${mntpt}"
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rmdir "${mntpt}"
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echo "Failed to update the EFI System Partition ${dev}"
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echo "Insufficient space remaining for ${file}"
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echo "Run e.g \"mount -t msdosfs ${dev} /mnt\" to inspect it for files that can be removed."
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die
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fi
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mkdir -p "${mntpt}/EFI/freebsd"
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# Keep a copy of the existing loader.efi in case there's a problem with the new one
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if [ -f "${mntpt}/EFI/freebsd/${dst}.efi" ] && [ "$kbfree" -gt "$((loadersize * 2))" ]; then
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cp "${mntpt}/EFI/freebsd/${dst}.efi" "${mntpt}/EFI/freebsd/${dst}-old.efi"
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fi
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echo "Copying loader to /EFI/freebsd on ESP"
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cp "${file}" "${mntpt}/EFI/freebsd/${dst}.efi"
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# efibootmgr won't work on systems with ia32 UEFI firmware
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# since we only use it to boot the 64-bit kernel
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if [ -n "${updatesystem}" ] && [ ${efibootname} != "bootia32" ]; then
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existingbootentryloaderfile=$(efibootmgr -v | grep "${mntpt}//EFI/freebsd/${dst}.efi")
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if [ -z "$existingbootentryloaderfile" ]; then
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# Try again without the double forward-slash in the path
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existingbootentryloaderfile=$(efibootmgr -v | grep "${mntpt}/EFI/freebsd/${dst}.efi")
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fi
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if [ -z "$existingbootentryloaderfile" ]; then
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echo "Creating UEFI boot entry for FreeBSD"
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efibootmgr --create --label FreeBSD --loader "${mntpt}/EFI/freebsd/${dst}.efi" > /dev/null
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if [ $? -ne 0 ]; then
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die "Failed to create new boot entry"
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fi
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# When creating new entries, efibootmgr doesn't mark them active, so we need to
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# do so. It doesn't make it easy to find which entry it just added, so rely on
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# the fact that it places the new entry first in BootOrder.
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bootorder=$(efivar --name 8be4df61-93ca-11d2-aa0d-00e098032b8c-BootOrder --print --no-name --hex | head -1)
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bootentry=$(echo "${bootorder}" | cut -w -f 3)$(echo "${bootorder}" | cut -w -f 2)
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echo "Marking UEFI boot entry ${bootentry} active"
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efibootmgr --activate "${bootentry}" > /dev/null
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else
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echo "Existing UEFI FreeBSD boot entry found: not creating a new one"
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fi
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else
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# Configure for booting from removable media
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if [ ! -d "${mntpt}/EFI/BOOT" ]; then
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mkdir -p "${mntpt}/EFI/BOOT"
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fi
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cp "${file}" "${mntpt}/EFI/BOOT/${efibootname}.efi"
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fi
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umount "${mntpt}"
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rmdir "${mntpt}"
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echo "Finished updating ESP"
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}
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make_esp() {
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local file loaderfile
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file=$1
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loaderfile=$2
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if [ -f "$file" ]; then
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make_esp_file ${file} ${fat32min} ${loaderfile}
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else
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make_esp_device ${file} ${loaderfile}
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fi
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}
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make_esp_mbr() {
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dev=$1
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dst=$2
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s=$(find_part $dev "!239")
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if [ -z "$s" ] ; then
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s=$(find_part $dev "efi")
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if [ -z "$s" ] ; then
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die "No ESP slice found"
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fi
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fi
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make_esp /dev/${dev}s${s} ${dst}/boot/loader.efi
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}
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make_esp_gpt() {
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dev=$1
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dst=$2
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idx=$(find_part $dev "efi")
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if [ -z "$idx" ] ; then
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die "No ESP partition found"
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fi
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make_esp /dev/${dev}p${idx} ${dst}/boot/loader.efi
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}
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boot_nogeli_gpt_ufs_legacy() {
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dev=$1
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dst=$2
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idx=$(find_part $dev "freebsd-boot")
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if [ -z "$idx" ] ; then
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die "No freebsd-boot partition found"
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fi
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doit gpart bootcode -b ${gpt0} -p ${gpt2} -i $idx $dev
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}
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boot_nogeli_gpt_ufs_uefi() {
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make_esp_gpt $1 $2
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}
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boot_nogeli_gpt_ufs_both() {
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boot_nogeli_gpt_ufs_legacy $1 $2 $3
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boot_nogeli_gpt_ufs_uefi $1 $2 $3
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}
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boot_nogeli_gpt_zfs_legacy() {
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dev=$1
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dst=$2
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idx=$(find_part $dev "freebsd-boot")
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if [ -z "$idx" ] ; then
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die "No freebsd-boot partition found"
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fi
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doit gpart bootcode -b ${gpt0} -p ${gptzfs2} -i $idx $dev
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}
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boot_nogeli_gpt_zfs_uefi() {
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make_esp_gpt $1 $2
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}
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boot_nogeli_gpt_zfs_both() {
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boot_nogeli_gpt_zfs_legacy $1 $2 $3
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boot_nogeli_gpt_zfs_uefi $1 $2 $3
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}
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boot_nogeli_mbr_ufs_legacy() {
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dev=$1
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dst=$2
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doit gpart bootcode -b ${mbr0} ${dev}
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s=$(find_part $dev "freebsd")
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if [ -z "$s" ] ; then
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die "No freebsd slice found"
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fi
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doit gpart bootcode -p ${mbr2} ${dev}s${s}
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}
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boot_nogeli_mbr_ufs_uefi() {
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make_esp_mbr $1 $2
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}
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boot_nogeli_mbr_ufs_both() {
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boot_nogeli_mbr_ufs_legacy $1 $2 $3
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boot_nogeli_mbr_ufs_uefi $1 $2 $3
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}
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boot_nogeli_mbr_zfs_legacy() {
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dev=$1
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dst=$2
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# search to find the BSD slice
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s=$(find_part $dev "freebsd")
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if [ -z "$s" ] ; then
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die "No BSD slice found"
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fi
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idx=$(find_part ${dev}s${s} "freebsd-zfs")
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if [ -z "$idx" ] ; then
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die "No freebsd-zfs slice found"
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fi
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# search to find the freebsd-zfs partition within the slice
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# Or just assume it is 'a' because it has to be since it fails otherwise
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doit gpart bootcode -b ${dst}/boot/mbr ${dev}
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dd if=${dst}/boot/zfsboot of=/tmp/zfsboot1 count=1
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doit gpart bootcode -b /tmp/zfsboot1 ${dev}s${s} # Put boot1 into the start of part
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sysctl kern.geom.debugflags=0x10 # Put boot2 into ZFS boot slot
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doit dd if=${dst}/boot/zfsboot of=/dev/${dev}s${s}a skip=1 seek=1024
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sysctl kern.geom.debugflags=0x0
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}
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boot_nogeli_mbr_zfs_uefi() {
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make_esp_mbr $1 $2
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}
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boot_nogeli_mbr_zfs_both() {
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boot_nogeli_mbr_zfs_legacy $1 $2 $3
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boot_nogeli_mbr_zfs_uefi $1 $2 $3
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}
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boot_geli_gpt_ufs_legacy() {
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boot_nogeli_gpt_ufs_legacy $1 $2 $3
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}
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boot_geli_gpt_ufs_uefi() {
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boot_nogeli_gpt_ufs_uefi $1 $2 $3
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}
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boot_geli_gpt_ufs_both() {
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boot_nogeli_gpt_ufs_both $1 $2 $3
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}
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boot_geli_gpt_zfs_legacy() {
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boot_nogeli_gpt_zfs_legacy $1 $2 $3
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}
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boot_geli_gpt_zfs_uefi() {
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boot_nogeli_gpt_zfs_uefi $1 $2 $3
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}
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boot_geli_gpt_zfs_both() {
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boot_nogeli_gpt_zfs_both $1 $2 $3
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}
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# GELI+MBR is not a valid configuration
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boot_geli_mbr_ufs_legacy() {
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exit 1
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}
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boot_geli_mbr_ufs_uefi() {
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exit 1
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}
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boot_geli_mbr_ufs_both() {
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exit 1
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}
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boot_geli_mbr_zfs_legacy() {
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exit 1
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}
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boot_geli_mbr_zfs_uefi() {
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exit 1
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}
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boot_geli_mbr_zfs_both() {
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exit 1
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}
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usage() {
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printf 'Usage: %s -b bios [-d destdir] -f fs [-g geli] [-h] [-o optargs] -s scheme <bootdev>\n' "$0"
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printf 'Options:\n'
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printf ' bootdev device to install the boot code on\n'
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printf ' -b bios bios type: legacy, uefi or both\n'
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printf ' -d destdir destination filesystem root\n'
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printf ' -f fs filesystem type: ufs or zfs\n'
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printf ' -g geli yes or no\n'
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printf ' -h this help/usage text\n'
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printf ' -u Run commands such as efibootmgr to update the\n'
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printf ' currently running system\n'
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printf ' -o optargs optional arguments\n'
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printf ' -s scheme mbr or gpt\n'
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exit 0
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}
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srcroot=/
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# Note: we really don't support geli boot in this script yet.
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geli=nogeli
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while getopts "b:d:f:g:ho:s:u" opt; do
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case "$opt" in
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b)
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bios=${OPTARG}
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;;
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d)
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srcroot=${OPTARG}
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;;
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f)
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fs=${OPTARG}
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;;
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g)
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case ${OPTARG} in
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[Yy][Ee][Ss]|geli) geli=geli ;;
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*) geli=nogeli ;;
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esac
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;;
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u)
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updatesystem=1
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;;
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o)
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opts=${OPTARG}
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;;
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s)
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scheme=${OPTARG}
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;;
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?|h)
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usage
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;;
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esac
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done
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if [ -n "${scheme}" ] && [ -n "${fs}" ] && [ -n "${bios}" ]; then
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shift $((OPTIND-1))
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dev=$1
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fi
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# For gpt, we need to install pmbr as the primary boot loader
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# it knows about
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gpt0=${srcroot}/boot/pmbr
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gpt2=${srcroot}/boot/gptboot
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gptzfs2=${srcroot}/boot/gptzfsboot
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# For MBR, we have lots of choices, but select mbr, boot0 has issues with UEFI
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mbr0=${srcroot}/boot/mbr
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mbr2=${srcroot}/boot/boot
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# sanity check here
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# Check if we've been given arguments. If not, this script is probably being
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# sourced, so we shouldn't run anything.
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if [ -n "${dev}" ]; then
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eval boot_${geli}_${scheme}_${fs}_${bios} $dev $srcroot $opts || echo "Unsupported boot env: ${geli}-${scheme}-${fs}-${bios}"
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fi
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