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@velzie
velzie committed Feb 26, 2023
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224 changes: 108 additions & 116 deletions crossystem.sh
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Original file line number Diff line number Diff line change
@@ -1,108 +1,122 @@
#!/bin/bash
# crossystem.sh v2.0.0
# made by r58Playz and stackoverflow
# emulates crossystem but with static values to trick brunch into thinking it is a valid chromebook with a valid everything
# version history:
# v2.0.0 - implemented all functionality
# v1.1.1 - hotfix for stupid crossystem
# v1.1.0 - implemented <var>?<value> functionality (searches for value in var)
# v1.0.0 - basic functionality implemented

# IF YOU WANT TO CHANGE VALUES PLEASE CHANGE THEM IN BOTH COPIES OF CROSSYSTEM VALUES!
# Mutable values path (needs to be writable and persistent across boots - try /mnt/stateful_partition)
mutablepath="/mnt/stateful_partition/mwtrollinggoogleforfakemurk"
#mutablepath="./mwtrollinggoogleforfakemurk"

##################################################
# PASTE (FORMATTED) OUTPUT OF `crossystem` HERE! #
##################################################
# Remove comments, put any text & hex in quotes, remove spaces

##############################################################################################################################################################################
# YOU SHOULD NOT NEED TO MODIFY THIS PART OF THE SCRIPT IF YOU ARE JUST A CONSUMER! BELOW IS THE INTERNAL LOGIC! #
##############################################################################################################################################################################

# make sure the mutable crossystem file exists lol
touch $mutablepath
# just in case
chmod a+rw $mutablepath

# load values from mutable crossystem
# shellcheck disable=SC1090 # crossystem needs to source an external file for mutable values
source $mutablepath
#__SED_REPLACEME_CROSSYSTEM_VALUES#

################################################
# PASTE (FORMATTED) OUTPUT OF crossystem HERE! #
# v3 now autopopulates this for you. be happy! #
################################################
# Remove comments, put any text & hex in quotes, remove spaces
__SED_REPLACEME_CROSSYSTEM_VALUES
#########################################
# PASTE OUTPUT OF crossystem HERE! TOO! #
#########################################
read -r -d '' cwossystem <<EOM
arch = x86 # [RO/str] Platform architecture
backup_nvram_request = 1 # [RW/int] Backup the nvram somewhere at the next boot. Cleared on success.
battery_cutoff_request = 0 # [RW/int] Cut off battery and shutdown on next boot
block_devmode = 0 # [RW/int] Block all use of developer mode
clear_tpm_owner_done = 1 # [RW/int] Clear TPM owner done
clear_tpm_owner_request = 0 # [RW/int] Clear TPM owner on next boot
cros_debug = 0 # [RO/int] OS should allow debug features
dbg_reset = 0 # [RW/int] Debug reset mode request
debug_build = 0 # [RO/int] OS image built for debug features
dev_boot_legacy = 0 # [RW/int] Enable developer mode boot Legacy OSes
dev_boot_signed_only = 0 # [RW/int] Enable developer mode boot only from official kernels
dev_boot_usb = 0 # [RW/int] Enable developer mode boot from USB/SD
dev_default_boot = disk # [RW/str] Default boot from disk, legacy or usb
dev_enable_udc = 0 # [RW/int] Enable USB Device Controller
devsw_boot = 0 # [RO/int] Developer switch position at boot
devsw_cur = 0 # [RO/int] Developer switch current position
disable_alt_os_request = 0 # [RW/int] Disable Alt OS mode on next boot (writable)
disable_dev_request = 0 # [RW/int] Disable virtual dev-mode on next boot
ecfw_act = RO # [RO/str] Active EC firmware
enable_alt_os_request = 0 # [RW/int] Enable Alt OS mode on next boot (writable)
post_ec_sync_delay = 0 # [RW/int] Short delay after EC software sync (persistent, writable, eve only)
alt_os_enabled = 0 # [RO/int] Alt OS state (1 if enabled, 0 if disabled)
fmap_base = 0xff285000 # [RO/int] Main firmware flashmap physical address
fw_prev_result = unknown # [RO/str] Firmware result of previous boot (vboot2)
fw_prev_tried = A # [RO/str] Firmware tried on previous boot (vboot2)
fw_result = unknown # [RW/str] Firmware result this boot (vboot2)
fw_tried = A # [RO/str] Firmware tried this boot (vboot2)
fw_try_count = 0 # [RW/int] Number of times to try fw_try_next
fw_try_next = A # [RW/str] Firmware to try next (vboot2)
fw_vboot2 = 1 # [RO/int] 1 if firmware was selected by vboot2 or 0 otherwise
fwb_tries = 0 # [RW/int] Try firmware B count
fwid = Google_Fleex.11297.204.0 # [RO/str] Active firmware ID
fwupdate_tries = 0 # [RW/int] Times to try OS firmware update (inside kern_nv)
hwid = GRABBITER G7B-B4E-N5A-K44-E6S-A94-A7T # [RO/str] Hardware ID
inside_vm = 0 # [RO/int] Running in a VM?
kern_nv = 0x0000 # [RO/int] Non-volatile field for kernel use
kernel_max_rollforward = 0xfffffffe # [RW/int] Max kernel version to store into TPM
kernkey_vfy = sig # [RO/str] Type of verification done on kernel key block
loc_idx = 0 # [RW/int] Localization index for firmware screens
mainfw_act = A # [RO/str] Active main firmware
mainfw_type = normal # [RO/str] Active main firmware type
nvram_cleared = 0 # [RW/int] Have NV settings been lost? Write 0 to clear
oprom_needed = 0 # [RW/int] Should we load the VGA Option ROM at boot?
phase_enforcement = (error) # [RO/int] Board should have full security settings applied
recovery_reason = 0 # [RO/int] Recovery mode reason for current boot
recovery_request = 0 # [RW/int] Recovery mode request
recovery_subcode = 0 # [RW/int] Recovery reason subcode
recoverysw_boot = 0 # [RO/int] Recovery switch position at boot
recoverysw_cur = (error) # [RO/int] Recovery switch current position
recoverysw_ec_boot = 0 # [RO/int] Recovery switch position at EC boot
recoverysw_is_virtual = 1 # [RO/int] Recovery switch is virtual
ro_fwid = Google_Fleex.11297.204.0 # [RO/str] Read-only firmware ID
tpm_attack = 0 # [RW/int] TPM was interrupted since this flag was cleared
tpm_fwver = 0x00010001 # [RO/int] Firmware version stored in TPM
tpm_kernver = 0x00010001 # [RO/int] Kernel version stored in TPM
tpm_rebooted = 0 # [RO/int] TPM requesting repeated reboot (vboot2)
tried_fwb = 0 # [RO/int] Tried firmware B before A this boot
try_ro_sync = 0 # [RO/int] try read only software sync
vdat_flags = 0x0003cc76 # [RO/int] Flags from VbSharedData
vdat_timers = LFS=0,0 LF=0,0 LK=0,414548 # [RO/str] Timer values from VbSharedData
wipeout_request = 0 # [RW/int] Firmware requested factory reset (wipeout)
wpsw_boot = 1 # [RO/int] Firmware write protect hardware switch position at boot
wpsw_cur = 1 # [RO/int] Firmware write protect hardware switch current position
arch = $arch # [RO/str] Platform architecture
backup_nvram_request = $backup_nvram_request # [RW/int] Backup the nvram somewhere at the next boot. Cleared on success.
battery_cutoff_request = $battery_cutoff_request # [RW/int] Cut off battery and shutdown on next boot
block_devmode = $block_devmode # [RW/int] Block all use of developer mode
clear_tpm_owner_done = $clear_tpm_owner_done # [RW/int] Clear TPM owner done
clear_tpm_owner_request = $clear_tpm_owner_request # [RW/int] Clear TPM owner on next boot
cros_debug = $cros_debug # [RO/int] OS should allow debug features
dbg_reset = $dbg_reset # [RW/int] Debug reset mode request
debug_build = $debug_build # [RO/int] OS image built for debug features
dev_boot_legacy = $dev_boot_legacy # [RW/int] Enable developer mode boot Legacy OSes
dev_boot_signed_only = $dev_boot_signed_only # [RW/int] Enable developer mode boot only from official kernels
dev_boot_usb = $dev_boot_usb # [RW/int] Enable developer mode boot from USB/SD
dev_default_boot = $dev_default_boot # [RW/str] Default boot from disk, legacy or usb
dev_enable_udc = $dev_enable_udc # [RW/int] Enable USB Device Controller
devsw_boot = $devsw_boot # [RO/int] Developer switch position at boot
devsw_cur = $devsw_cur # [RO/int] Developer switch current position
disable_alt_os_request = $disable_alt_os_request # [RW/int] Disable Alt OS mode on next boot (writable)
disable_dev_request = $disable_dev_request # [RW/int] Disable virtual dev-mode on next boot
ecfw_act = $ecfw_act # [RO/str] Active EC firmware
enable_alt_os_request = $enable_alt_os_request # [RW/int] Enable Alt OS mode on next boot (writable)
post_ec_sync_delay = $post_ec_sync_delay # [RW/int] Short delay after EC software sync (persistent, writable, eve only)
alt_os_enabled = $alt_os_enabled # [RO/int] Alt OS state (1 if enabled, 0 if disabled)
fmap_base = $fmap_base # [RO/int] Main firmware flashmap physical address
fw_prev_result = $fw_prev_result # [RO/str] Firmware result of previous boot (vboot2)
fw_prev_tried = $fw_prev_tried # [RO/str] Firmware tried on previous boot (vboot2)
fw_result = $fw_result # [RW/str] Firmware result this boot (vboot2)
fw_tried = $fw_tried # [RO/str] Firmware tried this boot (vboot2)
fw_try_count = $fw_try_count # [RW/int] Number of times to try fw_try_next
fw_try_next = $fw_try_next # [RW/str] Firmware to try next (vboot2)
fw_vboot2 = $fw_vboot2 # [RO/int] 1 if firmware was selected by vboot2 or 0 otherwise
fwb_tries = $fwb_tries # [RW/int] Try firmware B count
fwid = $fwid # [RO/str] Active firmware ID
fwupdate_tries = $fwupdate_tries # [RW/int] Times to try OS firmware update (inside kern_nv)
hwid = $hwid # [RO/str] Hardware ID
inside_vm = $inside_vm # [RO/int] Running in a VM?
kern_nv = $kern_nv # [RO/int] Non-volatile field for kernel use
kernel_max_rollforward = $kernel_max_rollforward # [RW/int] Max kernel version to store into TPM
kernkey_vfy = $kernkey_vfy # [RO/str] Type of verification done on kernel key block
loc_idx = $loc_idx # [RW/int] Localization index for firmware screens
mainfw_act = $mainfw_act # [RO/str] Active main firmware
mainfw_type = $mainfw_type # [RO/str] Active main firmware type
nvram_cleared = $nvram_cleared # [RW/int] Have NV settings been lost? Write 0 to clear
oprom_needed = $oprom_needed # [RW/int] Should we load the VGA Option ROM at boot?
phase_enforcement = $phase_enforcement # [RO/int] Board should have full security settings applied
recovery_reason = $recovery_reason # [RO/int] Recovery mode reason for current boot
recovery_request = $recovery_request # [RW/int] Recovery mode request
recovery_subcode = $recovery_subcode # [RW/int] Recovery reason subcode
recoverysw_boot = $recoverysw_boot # [RO/int] Recovery switch position at boot
recoverysw_cur = $recoverysw_cur # [RO/int] Recovery switch current position
recoverysw_ec_boot = $recoverysw_ec_boot # [RO/int] Recovery switch position at EC boot
recoverysw_is_virtual = $recoverysw_is_virtual # [RO/int] Recovery switch is virtual
ro_fwid = $ro_fwid # [RO/str] Read-only firmware ID
tpm_attack = $tpm_attack # [RW/int] TPM was interrupted since this flag was cleared
tpm_fwver = $tpm_fwver # [RO/int] Firmware version stored in TPM
tpm_kernver = $tpm_kernver # [RO/int] Kernel version stored in TPM
tpm_rebooted = $tpm_rebooted # [RO/int] TPM requesting repeated reboot (vboot2)
tried_fwb = $tried_fwb # [RO/int] Tried firmware B before A this boot
try_ro_sync = $try_ro_sync # [RO/int] try read only software sync
vdat_flags = $vdat_flags # [RO/int] Flags from VbSharedData
vdat_timers = $vdat_timers # [RO/str] Timer values from VbSharedData
wipeout_request = $wipeout_request # [RW/int] Firmware requested factory reset (wipeout)
wpsw_boot = $wpsw_boot # [RO/int] Firmware write protect hardware switch position at boot
wpsw_cur = $wpsw_cur # [RO/int] Firmware write protect hardware switch current position
EOM

parse1arg() {
is_comparison= $2
if [[ "${is_comparison}x" = "x" ]]; then
is_comparison=2
fi
if [[ $1 == *"?"* ]]; then
if [[ $is_comparison -eq 0 ]]; then
return 0
fi
aft="${1#*\?}" # after
bef="${1%\?*}" # before
# comparison mode
aft="${1#*\?}" # value to check for
bef="${1%\?*}" # key
if [[ "${!bef}" == *"$aft"* ]]; then
return 0
fi
return 1
else
if [[ $is_comparison -eq 1 ]]; then
return 0
elif [[ $1 == *"="* ]]; then
# mutable crossystem mode (NEW)
aft="${1#*\=}" # value to set
bef="${1%\=*}" # key
# check if value exists in mutable file
containsvalue=$(
source $mutablepath
[[ -z "${!aft}" ]] && echo 1 || echo 0
)
if [[ $containsvalue -eq 0 ]]; then # crossystem.sh: line 181: 0: command not found
sed -i "s/${bef}.*/${bef}=${aft}/" $mutablepath
else
echo "${bef}=${aft}" >>$mutablepath
fi
else
# get value mode
echo -n "${!1//$'\n'/}"
fi
}
Expand All @@ -120,37 +134,15 @@ logicor() {
if [[ $# -eq 0 ]]; then
echo -e "$cwossystem"
elif [[ $# -eq 1 ]]; then
parse1arg $1
parse1arg "$1"
exit $?
else
is_comparison=0
current_excode=0
is_first=1
if [[ $1 == *"?"* ]]; then
is_comparison=1
aft="${1#*\?}" # after
bef="${1%\?*}" # before
if [[ "${!bef}" == *"$aft"* ]]; then
logicor $current_excode 0
current_excode=$?
else
logicor $current_excode 1
current_excode=$?
fi
else
echo -n "${!1//$'\n'/}"
fi
echo -n " "
for arg in "$@"; do
if [[ is_first -eq 1 ]]; then
is_first=0
continue
fi
parse1arg $arg
parse1arg "$arg"
excode="$?"
logicor $current_excode $excode
logicor "$current_excode" "$excode"
current_excode=$?
echo -n " "
done
exit $current_excode
exit "$current_excode"
fi
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