Working EFI/Bios Stagex boot

Containerfile

@@ -6,16 +6,38 @@ FROM stagex/cpio AS cpio
 FROM stagex/linux-airgap AS linux
 FROM stagex/mtools AS mtools
 FROM stagex/xz AS xz
+FROM stagex/eudev AS eudev
+FROM stagex/keyfork AS keyfork
+FROM stagex/openpgp-card-tools AS openpgp-card-tools
+FROM stagex/gpg AS gpg
+FROM stagex/bash AS bash
 FROM stagex/grub:local AS grub
+FROM stagex/npth AS npth
+FROM stagex/libksba AS libksba
+FROM stagex/libgpg-error AS libgpg-error
+FROM stagex/libassuan AS libassuan
+FROM stagex/libgcrypt AS libgcrypt
+FROM stagex/jq AS jq
+FROM stagex/bc AS bc
+FROM stagex/git AS git
+FROM stagex/zlib AS zlib
+FROM stagex/tpm2-tools AS tpm2-tools
+FROM stagex/tpm2-tss AS tpm2-tss
+FROM stagex/openssl AS openssl
+FROM stagex/pcsc-lite AS pcsc-lite
+FROM stagex/flashtools AS flashtools
 
 FROM scratch AS base
+ARG VERSION development
+ARG GIT_TIMESTAMP null
+ARG GIT_AUTHOR null
+ARG GIT_REF null
+ARG GIT_KEY null
 COPY --from=busybox . /
 COPY --from=musl . /
 COPY --from=xorriso . /
 COPY --from=cpio . /
 COPY --from=mtools . /
-COPY --from=linux . /
-COPY --from=syslinux . /
 COPY --from=xz . /
 COPY --from=grub . /
 
@@ -25,38 +47,52 @@ FROM base AS build
 COPY --from=linux /bzImage iso/boot/vmlinuz
 
 ## Initramfs
-COPY --from=stagex/busybox . initramfs
-COPY --chmod=0755 <<-EOF initramfs/init
-    #!/bin/sh
-    /bin/sh
+COPY --from=busybox . initramfs
+COPY --from=eudev . initramfs
+COPY --from=musl . initramfs
+COPY --from=zlib . initramfs
+COPY --from=npth . initramfs
+COPY --from=libksba . initramfs
+COPY --from=libgpg-error . initramfs
+COPY --from=libassuan . initramfs
+COPY --from=libgcrypt . initramfs
+COPY --from=keyfork . initramfs
+COPY --from=bash . initramfs
+COPY --from=gpg . initramfs
+COPY --from=jq . initramfs
+COPY --from=bc . initramfs
+COPY --from=git . initramfs
+COPY --from=flashtools . initramfs
+COPY --from=tpm2-tools . initramfs
+COPY --from=tpm2-tss . initramfs
+COPY --from=openssl . initramfs
+COPY --from=pcsc-lite . initramfs
+COPY --from=openpgp-card-tools . initramfs
+COPY rootfs/ initramfs
+COPY <<-EOF initramfs/etc/environment
+    export VERSION="$VERSION"
+    export GIT_TIMESTAMP="$GIT_TIMESTAMP"
+    export GIT_AUTHOR="$GIT_AUTHOR"
+    export GIT_REF="$GIT_REF"
+    export GIT_KEY="$GIT_KEY"
 EOF
 RUN <<-EOF
-    set -eux
 	cd initramfs
-    find . \
-        | cpio -o -H newc \
-        | gzip -9 \
-    > ../iso/boot/initramfs
+	find . -print0 \
+	| cpio --null --create --verbose --format=newc \
+	| gzip --best > ../iso/boot/initramfs
 EOF
 
 ## Grub (EFI Boot)
-COPY <<-EOF iso/boot/grub/grub.cfg
-    menuentry "Linux Airgap" {
-	    linux	/boot/vmlinuz
-		initrd	/boot/initramfs
-    }
-EOF
-COPY <<-EOF grub_early.cfg
-	search --no-floppy --set=root --label "Airgap"
-	set prefix=(\$root)/boot/grub
-EOF
+COPY config/grub.cfg iso/boot/grub/grub.cfg
+COPY config/grub_early.cfg grub_early.cfg
 RUN <<-EOF
     set -eux
-    mkdir -p iso/efi/boot
+    mkdir -p efi/boot
     grub-mkimage \
         --config="grub_early.cfg" \
         --prefix="/boot/grub" \
-		--output="iso/efi/boot/bootx64.efi" \
+        --output="efi/boot/bootx64.efi" \
         --format="x86_64-efi" \
         --compression="xz" \
         all_video \
@@ -71,44 +107,24 @@ RUN <<-EOF
         efi_gop \
         fat \
         iso9660 \
-        cat \
-        echo \
-        ls \
-        test \
-        true \
-        help \
-        gzio
-EOF
-RUN <<-EOF
+        gzio \
+        serial \
+        terminal
     mformat -i iso/boot/grub/efi.img -C -f 1440 -N 0 ::
-    mcopy -i iso/boot/grub/efi.img iso/efi
+    mcopy -i iso/boot/grub/efi.img -s efi ::
     touch -md "@0" iso/boot/grub/efi.img
 EOF
 
-
 ## Syslinux (BIOS Boot)
-COPY <<-EOF iso/boot/syslinux/syslinux.cfg
-    TIMEOUT 2
-    PROMPT -1
-    DEFAULT Airgap
-    LABEL Airgap
-        MENU LABEL Linux Airgap
-        KERNEL /boot/vmlinuz
-        INITRD /boot/initramfs
-EOF
-RUN <<-EOF
-    mkdir -p iso/boot/syslinux
-    for file in \
-        isohdpfx.bin \
-        isolinux.bin \
-        ldlinux.c32 \
-        libutil.c32 \
-        libcom32.c32 \
-        mboot.c32; \
-    do
-		mv /usr/share/syslinux/$file iso/boot/syslinux/$file || return 1
-	done
-EOF
+COPY config/syslinux.cfg iso/boot/syslinux/
+COPY --from=syslinux \
+    /usr/share/syslinux/isohdpfx.bin \
+    /usr/share/syslinux/isolinux.bin \
+    /usr/share/syslinux/ldlinux.c32 \
+    /usr/share/syslinux/libutil.c32 \
+    /usr/share/syslinux/libcom32.c32 \
+    /usr/share/syslinux/mboot.c32 \
+    iso/boot/syslinux/
 
 ## Build Hybrid EFI/BIOS ISO
 FROM build AS install
@@ -118,6 +134,7 @@ RUN xorrisofs \
     -joliet \
     -rational-rock \
     -sysid LINUX \
+    -volid "airgap" \
     -isohybrid-mbr iso/boot/syslinux/isohdpfx.bin \
     -eltorito-boot boot/syslinux/isolinux.bin \
     -eltorito-catalog boot/syslinux/boot.cat \
@@ -132,5 +149,5 @@ RUN xorrisofs \
    iso/
 
 FROM scratch AS package
-COPY --from=install /iso /iso
+COPY --from=install /initramfs /initramfs
 COPY --from=install /airgap.iso /

Makefile

@@ -1,3 +1,9 @@
+VERSION := $(shell git tag --points-at HEAD)
+GIT_REF := $(shell git log -1 --format=%H)
+GIT_AUTHOR := $(shell git log -1 --format=%an)
+GIT_KEY := $(shell git log -1 --format=%GP)
+GIT_TIMESTAMP := $(shell git log -1 --format=%cd --date=iso)
+
 .DEFAULT_GOAL :=
 .PHONY: default
 default: \
@@ -15,7 +21,7 @@ vm-bios: out/airgap.iso
 		-cdrom "out/airgap.iso"
 
 .PHONY: vm-efi
-vm-efi:
+vm-efi: out/airgap.iso
 	qemu-system-x86_64 \
 		-m 4G \
 		-machine pc \
@@ -23,9 +29,14 @@ vm-efi:
 		-bios /usr/share/ovmf/OVMF.fd \
 		-cdrom "out/airgap.iso"
 
-out/airgap.iso: Containerfile
+out/airgap.iso: Containerfile $(shell git ls-files rootfs)
 	docker build \
 		--progress=plain \
 		--output type=local,dest=out \
+		--build-arg VERSION="$(or $(VERSION),"development")" \
+		--build-arg GIT_REF="$(GIT_REF)" \
+		--build-arg GIT_AUTHOR="$(GIT_AUTHOR)" \
+		--build-arg GIT_KEY="$(GIT_KEY)" \
+		--build-arg GIT_TIMESTAMP="$(GIT_TIMESTAMP)" \
 		-f Containerfile \
 		.

config/grub.cfg

@@ -0,0 +1,5 @@
+set timeout=1
+menuentry "Linux Airgap" {
+    linux /boot/vmlinuz init=/init console=ttyS0 console=tty0 ro
+    initrd /boot/initramfs
+}

config/grub_early.cfg

@@ -0,0 +1,2 @@
+search --no-floppy --set=root --label "airgap"
+set prefix=($root)/boot/grub

config/syslinux.cfg

@@ -0,0 +1,8 @@
+TIMEOUT 2
+PROMPT -1
+DEFAULT Airgap
+LABEL Airgap
+	MENU LABEL Linux Airgap
+	KERNEL /boot/vmlinuz
+	INITRD /boot/initramfs
+	APPEND init=/init console=ttyS0 console=tty0 ro

rootfs/etc/init.d/S01syslogd

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+DAEMON="syslogd"
+PIDFILE="/var/run/$DAEMON.pid"
+
+SYSLOGD_ARGS=""
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+# BusyBox' syslogd does not create a pidfile, so pass "-n" in the command line
+# and use "-m" to instruct start-stop-daemon to create one.
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -b -m -S -q -p "$PIDFILE" -x "/sbin/$DAEMON" \
+		-- -n $SYSLOGD_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PIDFILE"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		rm -f "$PIDFILE"
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	sleep 1
+	start
+}
+
+case "$1" in
+	start|stop|restart)
+		"$1";;
+	reload)
+		# Restart, since there is no true "reload" feature.
+		restart;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+esac

rootfs/etc/init.d/S02klogd

@@ -0,0 +1,55 @@
+#!/bin/sh
+
+DAEMON="klogd"
+PIDFILE="/var/run/$DAEMON.pid"
+
+KLOGD_ARGS=""
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+# BusyBox' klogd does not create a pidfile, so pass "-n" in the command line
+# and use "-m" to instruct start-stop-daemon to create one.
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -b -m -S -q -p "$PIDFILE" -x "/sbin/$DAEMON" \
+		-- -n $KLOGD_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PIDFILE"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		rm -f "$PIDFILE"
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	sleep 1
+	start
+}
+
+case "$1" in
+	start|stop|restart)
+		"$1";;
+	reload)
+		# Restart, since there is no true "reload" feature.
+		restart;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+esac

rootfs/etc/init.d/S02sysctl

@@ -0,0 +1,94 @@
+#!/bin/sh
+#
+# This script is used by busybox and procps-ng.
+#
+# With procps-ng, the "--system" option of sysctl also enables "--ignore", so
+# errors are not reported via syslog. Use the run_logger function to mimic the
+# --system behavior, still reporting errors via syslog. Users not interested
+# on error reports can add "-e" to SYSCTL_ARGS.
+#
+# busybox does not have a "--system" option neither reports errors via syslog,
+# so the scripting provides a consistent behavior between the implementations.
+# Testing the busybox sysctl exit code is fruitless, as at the moment, since
+# its exit status is zero even if errors happen. Hopefully this will be fixed
+# in a future busybox version.
+
+PROGRAM="sysctl"
+
+SYSCTL_ARGS=""
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$PROGRAM" ] && . "/etc/default/$PROGRAM"
+
+# Files are read from directories in the SYSCTL_SOURCES list, in the given
+# order. A file may be used more than once, since there can be multiple
+# symlinks to it. No attempt is made to prevent this.
+SYSCTL_SOURCES="/etc/sysctl.d/ /usr/local/lib/sysctl.d/ /usr/lib/sysctl.d/ /lib/sysctl.d/ /etc/sysctl.conf"
+
+# If the logger utility is available all messages are sent to syslog, except
+# for the final status. The file redirections do the following:
+#
+# - stdout is redirected to syslog with facility.level "kern.info"
+# - stderr is redirected to syslog with facility.level "kern.err"
+# - file dscriptor 4 is used to pass the result to the "start" function.
+#
+run_logger() {
+	# shellcheck disable=SC2086 # we need the word splitting
+	find $SYSCTL_SOURCES -maxdepth 1 -name '*.conf' -print0 2> /dev/null | \
+	xargs -0 -r -n 1 readlink -f | {
+		prog_status="OK"
+		while :; do
+			read -r file || {
+				echo "$prog_status" >&4
+				break
+			}
+			echo "* Applying $file ..."
+			/sbin/sysctl -p "$file" $SYSCTL_ARGS || prog_status="FAIL"
+		done 2>&1 >&3 | /usr/bin/logger -t sysctl -p kern.err
+	} 3>&1 | /usr/bin/logger -t sysctl -p kern.info
+}
+
+# If logger is not available all messages are sent to stdout/stderr.
+run_std() {
+	# shellcheck disable=SC2086 # we need the word splitting
+	find $SYSCTL_SOURCES -maxdepth 1 -name '*.conf' -print0 2> /dev/null | \
+	xargs -0 -r -n 1 readlink -f | {
+		prog_status="OK"
+		while :; do
+			read -r file || {
+				echo "$prog_status" >&4
+				break
+			}
+			echo "* Applying $file ..."
+			/sbin/sysctl -p "$file" $SYSCTL_ARGS || prog_status="FAIL"
+		done
+	}
+}
+
+if [ -x /usr/bin/logger ]; then
+	run_program="run_logger"
+else
+	run_program="run_std"
+fi
+
+start() {
+	printf '%s %s: ' "$1" "$PROGRAM"
+	status=$("$run_program" 4>&1)
+	echo "$status"
+	if [ "$status" = "OK" ]; then
+		return 0
+	fi
+	return 1
+}
+
+case "$1" in
+	start)
+		start "Running";;
+	restart|reload)
+		start "Rerunning";;
+	stop)
+		:;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+esac

rootfs/etc/init.d/S10udev

@@ -0,0 +1,29 @@
+#!/bin/sh
+
+# Check for config file and read it
+UDEV_CONFIG=/etc/udev/udev.conf
+test -r $UDEV_CONFIG || exit 6
+. $UDEV_CONFIG
+
+case "$1" in
+    start)
+        printf "Populating %s using udev: " "${udev_root:-/dev}"
+        [ -e /proc/sys/kernel/hotplug ] && printf '\000\000\000\000' > /proc/sys/kernel/hotplug
+        /sbin/udevd -d || { echo "FAIL"; exit 1; }
+        udevadm trigger --type=subsystems --action=add
+        udevadm trigger --type=devices --action=add
+        udevadm settle --timeout=30 || echo "udevadm settle failed"
+        echo "done"
+        ;;
+    stop)
+        # Stop execution of events
+        udevadm control --stop-exec-queue
+        killall udevd
+        ;;
+    *)
+        echo "Usage: $0 {start|stop}"
+        exit 1
+        ;;
+esac
+
+exit 0

rootfs/etc/init.d/S20urandom

@@ -0,0 +1,70 @@
+#! /bin/sh
+#
+# Preserve the random seed between reboots. See urandom(4).
+#
+
+# Quietly do nothing if /dev/urandom does not exist
+[ -c /dev/urandom ] || exit 0
+
+URANDOM_SEED="/var/lib/random-seed"
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/urandom" ] && . "/etc/default/urandom"
+
+if pool_bits=$(cat /proc/sys/kernel/random/poolsize 2> /dev/null); then
+	pool_size=$((pool_bits/8))
+else
+	pool_size=512
+fi
+
+init_rng() {
+	[ -f "$URANDOM_SEED" ] || return 0
+	printf 'Initializing random number generator: '
+	dd if="$URANDOM_SEED" bs="$pool_size" of=/dev/urandom count=1 2> /dev/null
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+save_random_seed() {
+	printf 'Saving random seed: '
+	status=1
+	if touch "$URANDOM_SEED.new" 2> /dev/null; then
+		old_umask=$(umask)
+		umask 077
+		dd if=/dev/urandom of="$URANDOM_SEED.tmp" bs="$pool_size" count=1 2> /dev/null
+		cat "$URANDOM_SEED" "$URANDOM_SEED.tmp" 2>/dev/null \
+			| sha256sum \
+			| cut -d ' ' -f 1 > "$URANDOM_SEED.new" && \
+		mv "$URANDOM_SEED.new" "$URANDOM_SEED" && status=0
+		rm -f "$URANDOM_SEED.tmp"
+		umask "$old_umask"
+		if [ "$status" -eq 0 ]; then
+			echo "OK"
+		else
+			echo "FAIL"
+		fi
+
+	else
+		echo "SKIP (read-only file system detected)"
+	fi
+	return "$status"
+}
+
+case "$1" in
+	start|restart|reload)
+		# Carry a random seed from start-up to start-up
+		# Load and then save the whole entropy pool
+		init_rng && save_random_seed;;
+	stop)
+		# Carry a random seed from shut-down to start-up
+		# Save the whole entropy pool
+		save_random_seed;;
+	*)
+		echo "Usage: $0 {start|stop|restart|reload}"
+		exit 1
+esac

rootfs/etc/init.d/rcK

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+
+# Stop all init scripts in /etc/init.d
+# executing them in reversed numerical order.
+#
+for i in $(ls -r /etc/init.d/S??*) ;do
+
+     # Ignore dangling symlinks (if any).
+     [ ! -f "$i" ] && continue
+
+     case "$i" in
+	*.sh)
+	    # Source shell script for speed.
+	    (
+		trap - INT QUIT TSTP
+		set stop
+		. $i
+	    )
+	    ;;
+	*)
+	    # No sh extension, so fork subprocess.
+	    $i stop
+	    ;;
+    esac
+done
+

rootfs/etc/init.d/rcS

@@ -0,0 +1,27 @@
+#!/bin/sh
+
+
+# Start all init scripts in /etc/init.d
+# executing them in numerical order.
+#
+for i in /etc/init.d/S??* ;do
+
+     # Ignore dangling symlinks (if any).
+     [ ! -f "$i" ] && continue
+
+     case "$i" in
+	*.sh)
+	    # Source shell script for speed.
+	    (
+		trap - INT QUIT TSTP
+		set start
+		. $i
+	    )
+	    ;;
+	*)
+	    # No sh extension, so fork subprocess.
+	    $i start
+	    ;;
+    esac
+done
+

rootfs/etc/inittab

@@ -1,11 +1,5 @@
 # /etc/inittab
-#
-# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
-#
-# Note: BusyBox init doesn't support runlevels.  The runlevels field is
-# completely ignored by BusyBox init. If you want runlevels, use
-# sysvinit.
-#
+
 # Format for each entry: <id>:<runlevels>:<action>:<process>
 #
 # id        == tty to run on, or empty for /dev/console
@@ -14,16 +8,15 @@
 # process   == program to run
 
 # Startup the system
+::sysinit:/bin/mount -t devtmpfs devtmpfs /dev
+::sysinit:/bin/mkdir -p /proc /run /dev/pts /dev/shm
 ::sysinit:/bin/mount -t proc proc /proc
 ::sysinit:/bin/mount -o remount,rw /
-::sysinit:/bin/mkdir -p /dev/pts /dev/shm
 ::sysinit:/bin/mount -a
-::sysinit:/sbin/swapon -a
 null::sysinit:/bin/ln -sf /proc/self/fd /dev/fd
 null::sysinit:/bin/ln -sf /proc/self/fd/0 /dev/stdin
 null::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout
 null::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr
-::sysinit:/bin/hostname -F /etc/hostname
 # now run any rc scripts
 ::sysinit:/etc/init.d/rcS
 
@@ -36,5 +29,4 @@ null::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr
 
 # Stuff to do before rebooting
 ::shutdown:/etc/init.d/rcK
-::shutdown:/sbin/swapoff -a
 ::shutdown:/bin/umount -a -r

rootfs/etc/profile

@@ -3,8 +3,7 @@ export PATH="/usr/local/bin:/bin:/sbin:/usr/bin:/usr/sbin"
 export PS1="[\h \t] \\$ "
 export GNUPGHOME=/.gnupg
 source /etc/environment
-
-dmesg -n1
+cd /root
 clear
 cat << "EOF"
       _    _                        ___  ____

rootfs/init

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec /bin/init