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|
#!/bin/bash
set -o nounset
declare -A default="($(< /etc/hardening-wrapper.conf))"
force_bindnow="${HARDENING_BINDNOW:-"${default[HARDENING_BINDNOW]:-1}"}"
force_fPIE="${HARDENING_PIE:-"${default[HARDENING_PIE]:-1}"}"
force_fortify="${HARDENING_FORTIFY:-"${default[HARDENING_FORTIFY]:-2}"}"
force_pie="${HARDENING_PIE:-"${default[HARDENING_PIE]:-1}"}"
force_relro="${HARDENING_RELRO:-"${default[HARDENING_RELRO]:-1}"}"
force_stack_check="${HARDENING_STACK_CHECK:-"${default[HARDENING_STACK_CHECK]:-0}"}"
force_stack_protector="${HARDENING_STACK_PROTECTOR:-${default[HARDENING_STACK_PROTECTOR]:-2}}"
error() {
echo "$1" >&2
exit 1
}
linking=1
optimizing=0
for opt; do
case "$opt" in
-fno-PIC|-fno-pic|-fno-PIE|-fno-pie|-nopie|-static|--static|-shared|--shared|-D__KERNEL__|-nostdlib|-nostartfiles)
force_fPIE=0
force_pie=0
;;
-fPIC|-fpic|-fPIE|-fpie)
force_fPIE=0
;;
-c)
linking=0
;;
-nostdlib|-ffreestanding)
force_stack_protector=0
;;
-D_FORTIFY_SOURCE*)
force_fortify=0
;;
-O0)
optimizing=0
;;
-O*)
optimizing=1
;;
esac
done
arguments=()
case "$force_bindnow" in
0) ;;
1) (( linking )) && arguments+=(-Wl,-z,now) ;;
*) error 'invalid value for HARDENING_BINDNOW' ;;
esac
case "$force_fPIE" in
0) ;;
1) arguments+=(-fPIE) ;;
*) error 'invalid value for HARDENING_PIE' ;;
esac
case "$force_fortify" in
0) ;;
1|2) (( optimizing )) && arguments+=(-D_FORTIFY_SOURCE=$force_fortify) ;;
*) error 'invalid value for HARDENING_FORTIFY' ;;
esac
case "$force_pie" in
0) ;;
1) (( linking )) && arguments+=(-pie) ;;
*) error 'invalid value for HARDENING_PIE' ;;
esac
case "$force_relro" in
0) ;;
1) (( linking )) && arguments+=(-Wl,-z,relro) ;;
*) error 'invalid value for HARDENING_RELRO' ;;
esac
case "$force_stack_check" in
0) ;;
1) arguments+=(-fstack-check) ;;
*) error 'invalid value for HARDENING_STACK_CHECK' ;;
esac
case "$force_stack_protector" in
0) ;;
1) arguments+=(-fstack-protector) ;;
2) arguments+=(-fstack-protector-strong) ;;
3) arguments+=(-fstack-protector-all) ;;
*) error 'invalid value for HARDENING_STACK_PROTECTOR' ;;
esac
unwrapped=false
IFS=: read -ra path <<< "$PATH";
for p in "${path[@]}"; do
binary="$p/${0##*/}"
if [[ "$binary" != "$0" && -x "$binary" ]]; then
unwrapped="$binary"
break
fi
done
exec "$unwrapped" "${arguments[@]}" "$@"
|
