V8.00.000.2025.06.17
All checks were successful
🛡️ Shell Script Linting / 🛡️ Shell Script Linting (push) Successful in 1m29s
All checks were successful
🛡️ Shell Script Linting / 🛡️ Shell Script Linting (push) Successful in 1m29s
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
This commit is contained in:
377
func/9999_coresecret.sh
Normal file
377
func/9999_coresecret.sh
Normal file
@@ -0,0 +1,377 @@
|
||||
#!/bin/bash
|
||||
# SPDX-Version: 3.0
|
||||
# SPDX-CreationInfo: 2025-05-05; WEIDNER, Marc S.; <msw@coresecret.dev>
|
||||
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
|
||||
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
|
||||
# SPDX-FileCopyrightText: 2024–2025; WEIDNER, Marc S.; <msw@coresecret.dev>
|
||||
# SPDX-FileType: SOURCE
|
||||
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
|
||||
# SPDX-LicenseComment: This file is part of the CISS.hardened.installer framework.
|
||||
# SPDX-PackageName: CISS.debian.installer
|
||||
# SPDX-Security-Contact: security@coresecret.eu
|
||||
|
||||
# coresecret.sh to be executed after dropbear SSH login
|
||||
|
||||
set -C -e -u -o pipefail
|
||||
IFS=$(printf ' \n\t')
|
||||
|
||||
# shellcheck disable=SC2155
|
||||
declare -gr CURRENTDATE=$(date +"%F %T")
|
||||
declare -gir MAX_RETRIES=2
|
||||
|
||||
#######################################
|
||||
# Generates informative shell prompt.
|
||||
# Globals:
|
||||
# PS1
|
||||
# Arguments:
|
||||
# None
|
||||
#######################################
|
||||
prompt_string() {
|
||||
declare -gx PS1="\
|
||||
\[\033[1;91m\]\d\[\033[0m\]|\[\033[1;91m\]\u\[\033[0m\]@\
|
||||
\[\033[1;95m\]\h\[\033[0m\]:\
|
||||
\[\033[1;96m\]\w\[\033[0m\]/>>\
|
||||
\$(if [[ \$? -eq 0 ]]; then \
|
||||
# Show exit status in green if zero
|
||||
echo -e \"\[\033[1;92m\]\$?\[\033[0m\]\"; \
|
||||
else \
|
||||
# Show exit status in red otherwise
|
||||
echo -e \"\[\033[1;91m\]\$?\[\033[0m\]\"; \
|
||||
fi)\
|
||||
|~\$ "
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Trap function to be called on 'ERR'.
|
||||
# Arguments:
|
||||
# $1: ${?}
|
||||
# $2: ${BASH_SOURCE[0]}
|
||||
# $3: ${LINENO}
|
||||
# $4: ${FUNCNAME[0]:-main}
|
||||
# $5: ${BASH_COMMAND}
|
||||
#######################################
|
||||
trap_on_err() {
|
||||
declare -r errcode="$1"
|
||||
declare -r errscrt="$2"
|
||||
declare -r errline="$3"
|
||||
declare -r errfunc="$4"
|
||||
declare -r errcmmd="$5"
|
||||
trap - ERR
|
||||
stty echo
|
||||
if [[ ${errcode} -eq 0 ]]; then
|
||||
print_scr_scc
|
||||
prompt_string
|
||||
exit 0
|
||||
else
|
||||
print_scr_err "${errcode}" "${errscrt}" "${errline}" "${errfunc}" "${errcmmd}"
|
||||
sleep 15
|
||||
sync
|
||||
set +C
|
||||
echo 1 > /proc/sys/kernel/sysrq
|
||||
echo o > /proc/sysrq-trigger
|
||||
fi
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Security Trap on 'INT' and 'TERM' to provide a deterministic way to not circumvent the Nuke Routine
|
||||
# Globals:
|
||||
# DEVICES_LUKS
|
||||
# DEVICES_NUKE
|
||||
# Arguments:
|
||||
# None
|
||||
#######################################
|
||||
trap_on_term() {
|
||||
trap - INT
|
||||
stty echo
|
||||
printf "\n"
|
||||
printf "\e[0;91m✘ System caught a 'SIGINT'. System Power Off in 3 seconds. \e[0m\n" >&2
|
||||
sync
|
||||
sleep 3
|
||||
set +C
|
||||
echo 1 > /proc/sys/kernel/sysrq
|
||||
echo o > /proc/sysrq-trigger
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Print Error Message for 'non-0' Trap on 'EXIT' on Terminal.
|
||||
# Arguments:
|
||||
# $1: ${?}
|
||||
# $2: ${BASH_SOURCE[0]}
|
||||
# $3: ${LINENO}
|
||||
# $4: ${FUNCNAME[0]:-main}
|
||||
# $5: ${BASH_COMMAND}
|
||||
#######################################
|
||||
print_scr_err() {
|
||||
declare -r scr_err_errcode="$1"
|
||||
declare -r scr_err_errscrt="$2"
|
||||
declare -r scr_err_errline="$3"
|
||||
declare -r scr_err_errfunc="$4"
|
||||
declare -r scr_err_errcmmd="$5"
|
||||
printf "\n"
|
||||
printf "\e[0;91m✘ System caught an 'ERROR'. System Power Off in 15 seconds. \e[0m\n" >&2
|
||||
printf "\n"
|
||||
printf "\e[0;91m✘ Error : %s \e[0m\n" "${scr_err_errcode}" >&2
|
||||
printf "\e[0;91m✘ Line : %s \e[0m\n" "${scr_err_errline}" >&2
|
||||
printf "\e[0;91m✘ Script : %s \e[0m\n" "${scr_err_errscrt}" >&2
|
||||
printf "\e[0;91m✘ Function : %s \e[0m\n" "${scr_err_errfunc}" >&2
|
||||
printf "\e[0;91m✘ Command : %s \e[0m\n" "${scr_err_errcmmd}" >&2
|
||||
printf "\n"
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Print Error Message for '0' Trap on 'ERR' on Terminal.
|
||||
# Arguments:
|
||||
# none
|
||||
#######################################
|
||||
print_scr_scc() {
|
||||
printf "\e[0;92m✅ Script exited successfully. Proceeding with booting. \e[0m\n"
|
||||
printf "\n"
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Gather information of all LUKS Devices available on the system
|
||||
# Arguments:
|
||||
# None
|
||||
#######################################
|
||||
gather_luks_devices() {
|
||||
declare prev=() curr=() dev="" tries=0
|
||||
|
||||
while ((tries < 10)); do
|
||||
mapfile -t curr < <(blkid -t TYPE=crypto_LUKS -o device)
|
||||
|
||||
if [[ ${curr[*]} == "${prev[*]}" ]]; then
|
||||
break
|
||||
fi
|
||||
|
||||
prev=("${curr[@]}")
|
||||
tries=$((tries + 1))
|
||||
sleep 1
|
||||
done
|
||||
|
||||
### Print one device per line for mapfile compatibility
|
||||
for dev in "${curr[@]}"; do
|
||||
printf '%s\n' "${dev}"
|
||||
done
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Gather information of all NUKE Devices available on the system
|
||||
# Globals:
|
||||
# DEVICES_LUKS
|
||||
# Arguments:
|
||||
# None
|
||||
#######################################
|
||||
gather_nuke_devices() {
|
||||
### 'DEVICES_LUKS' must already be a bash array of device paths
|
||||
declare dev=""
|
||||
declare result=()
|
||||
|
||||
for dev in "${DEVICES_LUKS[@]}"; do
|
||||
### Check slot 31 for 'luks2'
|
||||
if cryptsetup luksDump "${dev}" 2> /dev/null | grep -qE '^[[:space:]]*31: luks2'; then
|
||||
result+=("${dev}")
|
||||
fi
|
||||
done
|
||||
|
||||
### Print one device per line for mapfile compatibility
|
||||
for dev in "${result[@]}"; do
|
||||
printf '%s\n' "${dev}"
|
||||
done
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Read passphrase interactively.
|
||||
# Arguments:
|
||||
# None
|
||||
#######################################
|
||||
passphrase_ask() {
|
||||
declare -g PASSPHRASE=""
|
||||
printf "\n"
|
||||
stty -echo
|
||||
printf "\e[0;95m🔐 Enter passphrase for decryption: \e[0m\n"
|
||||
read -r PASSPHRASE
|
||||
stty echo
|
||||
printf "\n"
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Test the entered passphrase against the dedicated Nuke Keyslot #31.
|
||||
# Arguments:
|
||||
# $1: DEVICE
|
||||
# $2: PASSWD
|
||||
#######################################
|
||||
passphrase_test() {
|
||||
declare -r DEVICE="$1"
|
||||
declare -r PASPHR="$2"
|
||||
printf '%s' "${PASPHR}" | cryptsetup open --batch-mode --test-passphrase --key-slot 31 "${DEVICE}" > /dev/null 2>&1
|
||||
}
|
||||
|
||||
#######################################
|
||||
# Check the integrity and authenticity of this script itself.
|
||||
# Arguments:
|
||||
# $0: Script Name
|
||||
#######################################
|
||||
verify_coresecret() {
|
||||
### Directory of this script
|
||||
# shellcheck disable=SC2155
|
||||
declare dir="$(dirname "$(readlink -f "${0}")")"
|
||||
# shellcheck disable=SC2155
|
||||
declare script="$(basename "${0}")"
|
||||
declare algo
|
||||
|
||||
for algo in sha512 sha384; do
|
||||
# shellcheck disable=SC2155
|
||||
declare hashfile="${dir}/${script}.${algo}"
|
||||
# shellcheck disable=SC2155
|
||||
declare sigfile="${hashfile}.sig"
|
||||
# shellcheck disable=SC2155
|
||||
declare cmd="${algo}sum"
|
||||
|
||||
printf "\e[0;95m🔏 Verifying signature of: [%s] \e[0m\n" "${hashfile}"
|
||||
gpgv --keyring /etc/keys/pubring.gpg "${sigfile}" "${hashfile}" || {
|
||||
printf "\e[0;91m✘ Signature verification failed for: [%s] \e[0m\n" "${hashfile}" >&2
|
||||
printf "\e[0;91m✘ System Power Off in 3 seconds. \e[0m\n" >&2
|
||||
sync
|
||||
sleep 3
|
||||
set +C
|
||||
echo 1 > /proc/sys/kernel/sysrq
|
||||
echo o > /proc/sysrq-trigger
|
||||
}
|
||||
printf "\e[0;92m🔏 Verifying signature of: [%s] successful. \e[0m\n" "${hashfile}"
|
||||
|
||||
printf "\e[0;95m🔢 Recomputing Hash: [%s] \e[0m\n" "${algo}"
|
||||
# shellcheck disable=SC2155
|
||||
declare computed=$($cmd "${dir}/${script}" | awk '{print $1}')
|
||||
# shellcheck disable=SC2155
|
||||
declare expected=$(cat "${hashfile}")
|
||||
|
||||
if [[ ${computed} != "${expected}" ]]; then
|
||||
printf "\e[0;91m✘ Hash mismatch for: [%s] \e[0m\n" "${algo}" >&2
|
||||
printf "\e[0;91m✘ System Power Off in 3 seconds. \e[0m\n" >&2
|
||||
sync
|
||||
sleep 3
|
||||
set +C
|
||||
echo 1 > /proc/sys/kernel/sysrq
|
||||
echo o > /proc/sysrq-trigger
|
||||
fi
|
||||
printf "\e[0;92m🔢 Recomputing Hash: [%s] successful. \e[0m\n" "${algo}"
|
||||
done
|
||||
|
||||
printf "\e[0;92m🔏 All signatures and hashes verified successfully. Proceeding. \e[0m\n"
|
||||
}
|
||||
|
||||
### Main Programm
|
||||
trap 'trap_on_err "$?" "${BASH_SOURCE[0]}" "${LINENO}" "${FUNCNAME[0]:-main}" "${BASH_COMMAND}"' ERR
|
||||
trap 'trap_on_term' INT TERM
|
||||
|
||||
printf "\e[0;91mCoresecret Connection established.\e[0m\n"
|
||||
printf "\e[0;91mStarting Time: %s\e[0m\n" "${CURRENTDATE}"
|
||||
printf "\n"
|
||||
|
||||
verify_coresecret
|
||||
|
||||
### Read newline-separated output into an array
|
||||
mapfile -t DEVICES_LUKS < <(gather_luks_devices)
|
||||
mapfile -t DEVICES_NUKE < <(gather_nuke_devices)
|
||||
|
||||
### Debug output: list each element with its index
|
||||
#for idx in "${!DEVICES_LUKS[@]}"; do
|
||||
# printf 'Luks[%d]: %s\n' "${idx}" "${DEVICES_LUKS[${idx}]}"
|
||||
#done
|
||||
|
||||
### Debug output: list each element with its index
|
||||
#for idx in "${!DEVICES_NUKE[@]}"; do
|
||||
# printf 'Nuke[%d]: %s\n' "${idx}" "${DEVICES_NUKE[${idx}]}"
|
||||
#done
|
||||
|
||||
### # If there are no LUKS devices at all, drop to bash
|
||||
[[ -n ${DEVICES_LUKS[*]} ]] || {
|
||||
printf "\e[0;92m✘ No LUKS Devices found. Dropping to bash ... \e[0m\n"
|
||||
prompt_string
|
||||
exec /bin/bash -i
|
||||
}
|
||||
|
||||
### If there are LUKS devices but no Nuke devices, try unlocking flow
|
||||
if [[ -n ${DEVICES_LUKS[*]} ]] && [[ -z ${DEVICES_NUKE[*]} ]]; then
|
||||
### Attempt interactive unlock with cryptroot-unlock
|
||||
if cryptroot-unlock; then
|
||||
|
||||
exit 0
|
||||
|
||||
else
|
||||
|
||||
printf "\n"
|
||||
printf "\e[0;91m✘ Unsuccessful command 'cryptroot-unlock'. \e[0m\n"
|
||||
printf "\e[0;92m✘ No LUKS operations performed. Dropping to bash ... \e[0m\n"
|
||||
printf "\e[0;92m✘ To unlock 'root' partition, and maybe others like 'swap', run 'cryptroot-unlock'. \e[0m\n"
|
||||
prompt_string
|
||||
exec /bin/bash -i
|
||||
|
||||
fi
|
||||
|
||||
elif [[ -n ${DEVICES_LUKS[*]} ]] && [[ -n ${DEVICES_NUKE[*]} ]]; then
|
||||
|
||||
declare -i attempt=1
|
||||
declare NUKED=false
|
||||
declare TEST_DEV="${DEVICES_NUKE[0]}"
|
||||
|
||||
while ((attempt <= MAX_RETRIES)); do
|
||||
|
||||
printf "\e[0;95m🔐Attempt %s/%s: \e[0m\n" "${attempt}" "${MAX_RETRIES}"
|
||||
|
||||
passphrase_ask
|
||||
declare -g PASSWD="${PASSPHRASE}"
|
||||
|
||||
if passphrase_test "${TEST_DEV}" "${PASSWD}"; then
|
||||
|
||||
for dev in "${DEVICES_NUKE[@]}"; do
|
||||
cryptsetup erase --batch-mode "${dev}" > /dev/null 2>&1
|
||||
printf "%s:\e[0;95m✘ LUKS Device Header malfunction. \e[0m\n" "${dev}"
|
||||
done
|
||||
|
||||
declare -r NUKED=true
|
||||
unset PASSWD
|
||||
break
|
||||
|
||||
else
|
||||
|
||||
declare code="$?"
|
||||
|
||||
case "${code}" in
|
||||
1) printf "\e[0;91m✘ No usable key slot is available. \e[0m\n" ;;
|
||||
2) printf "\e[0;91m✘ No key available with this passphrase. \e[0m\n" ;;
|
||||
3) printf "\e[0;93m✘ Out of memory. \e[0m\n" ;;
|
||||
*) printf "\e[0;91m✘ Unexpected Return Code. \e[0m\n" ;;
|
||||
esac
|
||||
|
||||
fi
|
||||
|
||||
attempt=$((attempt + 1))
|
||||
|
||||
done
|
||||
|
||||
if [[ ${NUKED} == true ]]; then
|
||||
stty echo
|
||||
sleep 3
|
||||
sync
|
||||
set +C
|
||||
echo 1 > /proc/sys/kernel/sysrq
|
||||
echo o > /proc/sysrq-trigger
|
||||
fi
|
||||
|
||||
if cryptroot-unlock; then
|
||||
|
||||
exit 0
|
||||
|
||||
else
|
||||
|
||||
printf "\e[0;91m✘ Unsuccessful command 'cryptroot-unlock'. \e[0m\n"
|
||||
printf "\e[0;92m✘ No LUKS operations performed. Dropping to bash ... \e[0m\n"
|
||||
printf "\e[0;92m✘ To unlock 'root' partition, and maybe others like 'swap', run 'cryptroot-unlock'. \e[0m\n"
|
||||
prompt_string
|
||||
exec /bin/bash -i
|
||||
|
||||
fi
|
||||
|
||||
fi
|
||||
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh:
|
||||
Reference in New Issue
Block a user