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Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙ#!/bin/sh set -e if test $# = 0 \ && test x"$SHIM_NOTRIGGER" = x \ && test x"$DPKG_MAINTSCRIPT_PACKAGE" != x \ && dpkg-trigger --check-supported 2>/dev/null then if dpkg-trigger --no-await shim-secureboot-policy; then if test x"$SHIM_TRIGGER_DEBUG" != x; then echo "shim: wrapper deferring policy update (trigger activated)" fi exit 0 fi fi . /usr/share/debconf/confmodule setup_mok_validation() { local moksbstatert local efivars secureboot_var moksb_var moksbstatert_var local enable_sb action enable_sb=$1 efivars=/sys/firmware/efi/efivars secureboot_var=SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c moksb_var=MokSB-605dab50-e046-4300-abb6-3dd810dd8b23 moksbstatert_var=MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23 action=disable if [ $enable_sb -eq 1 ]; then action=enable fi if ! [ -f $efivars/$secureboot_var ] \ || [ "$(od -An -t u1 $efivars/$secureboot_var | awk '{ print $NF }')" -ne 1 ] then echo "Secure Boot not enabled on this system." >&2 return 0 fi moksbstatert=0 if [ -f $efivars/$moksb_var ]; then # if MokSB exists we've likely already run mokutil since last boot echo "The Secure Boot policy was already changed since last reboot; nothing to do." >&2 return 0 fi if [ -f /proc/sys/kernel/moksbstate_disabled ]; then moksbstatert=$(cat /proc/sys/kernel/moksbstate_disabled 2>/dev/null || echo 0) elif [ -f $efivars/$moksbstatert_var ]; then # MokSBStateRT set to 1 means validation is disabled moksbstatert=$(od -An -t u1 $efivars/$moksbstatert_var | \ awk '{ print $NF; }') fi # poor man's xor if [ $(($moksbstatert+$enable_sb)) -ne 1 ]; then STATE=1 db_settitle shim/title/secureboot while true; do case "$STATE" in 1) db_capb db_fset shim/secureboot_explanation seen false db_input critical shim/secureboot_explanation || true db_go # Allow the user to skip disabling Secure Boot. db_fset shim/${action}_secureboot seen false db_input critical shim/${action}_secureboot || true ;; 2) db_get shim/${action}_secureboot if [ "$RET" = "false" ]; then break fi db_input critical shim/secureboot_key || true seen_key=$RET db_input critical shim/secureboot_key_again || true ;; 3) db_get shim/secureboot_key key="$RET" db_get shim/secureboot_key_again again="$RET" if [ -z "$key$again" ] && echo "$seen_key" | grep -q ^30; then echo "Running in non-interactive mode, doing nothing." >&2 exit 1 fi db_capb if [ "$key" != "$again" ]; then db_fset shim/error/secureboot_key_mismatch seen false db_input critical shim/error/secureboot_key_mismatch || true STATE=$(($STATE - 2)) else length=$((`echo "$key" | wc -c` - 1)) if [ $length -lt 8 ] || [ $length -gt 16 ]; then db_fset shim/error/bad_secureboot_key seen false db_input critical shim/error/bad_secureboot_key || true STATE=$(($STATE - 2)) elif [ $length -ne 0 ]; then printf '%s\n%s\n' "$key" "$again" | mokutil --${action}-validation >/dev/null || true fi fi # Always clear secureboot key. db_set shim/secureboot_key '' db_fset shim/secureboot_key seen false db_set shim/secureboot_key_again '' db_fset shim/secureboot_key_again seen false ;; *) break ;; esac if db_go; then STATE=$(($STATE + 1)) else STATE=$(($STATE - 1)) fi db_capb backup done db_capb fi } args=$@ enable_secureboot=0 if echo "$args" | grep -qc -- '--enable'; then enable_secureboot=1 elif echo "$args" | grep -qc -- '--disable'; then enable_secureboot=0 elif echo "$args" | grep -qc -- '--help'; then echo "update-secureboot-policy: toggle UEFI Secure Boot in shim" echo echo "\t--enable\tPrompt to enable Secure Boot validation." echo "\t--disable\tPrompt to disable Secure Boot validation (default)." echo "\t--help\t\tThis help text." exit 0 fi if [ -d /var/lib/dkms ] && [ `find /var/lib/dkms -type d -print | wc -l ` -gt 1 ]; then setup_mok_validation $enable_secureboot else echo "No DKMS packages installed: not changing Secure Boot validation state." fi exit 0