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#!/bin/sh
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########################################################################
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# rpi2-gen-image.sh ver2a 12/2015
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#
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# Advanced debian "jessie" bootstrap script for RPi2
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# some parts based on rpi2-build-image:
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# Copyright (C) 2015 Ryan Finnie <ryan@finnie.org>
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# Copyright (C) 2015 Luca Falavigna <dktrkranz@debian.org>
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########################################################################
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# Clean up all temporary mount points
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cleanup (){
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set +x
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set +e
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echo "removing temporary mount points ..."
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umount -l $R/proc 2> /dev/null
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umount -l $R/sys 2> /dev/null
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umount -l $R/dev/pts 2> /dev/null
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umount "$BUILDDIR/mount/boot/firmware" 2> /dev/null
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umount "$BUILDDIR/mount" 2> /dev/null
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losetup -d "$EXT4_LOOP" 2> /dev/null
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losetup -d "$VFAT_LOOP" 2> /dev/null
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trap - 0 1 2 3 6
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}
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set -e
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set -x
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# Debian release
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RELEASE=${RELEASE:=jessie}
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# Build settings
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BASEDIR=./images/${RELEASE}
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BUILDDIR=${BASEDIR}/build
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# General settings
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HOSTNAME=${HOSTNAME:=rpi2-${RELEASE}}
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PASSWORD=${PASSWORD:=raspberry}
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DEFLOCAL=${DEFLOCAL:="en_US.UTF-8"}
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TIMEZONE=${TIMEZONE:="`cat /etc/timezone`"}
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# APT settings
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APT_PROXY=${APT_PROXY:=""}
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APT_SERVER=${APT_SERVER:="ftp.debian.org"}
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# Feature settings
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ENABLE_CONSOLE=${ENABLE_CONSOLE:=true}
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ENABLE_IPV6=${ENABLE_IPV6:=true}
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ENABLE_SSHD=${ENABLE_SSHD:=true}
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ENABLE_SOUND=${ENABLE_SOUND:=true}
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ENABLE_DBUS=${ENABLE_DBUS:=true}
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ENABLE_HWRANDOM=${ENABLE_HWRANDOM:=true}
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ENABLE_MINGPU=${ENABLE_MINGPU:=false}
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ENABLE_XORG=${ENABLE_XORG:=false}
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ENABLE_WM=${ENABLE_WM:=""}
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# Advanced settings
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ENABLE_MINBASE=${ENABLE_MINBASE:=false}
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ENABLE_UBOOT=${ENABLE_UBOOT:=false}
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ENABLE_FBTURBO=${ENABLE_FBTURBO:=false}
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ENABLE_HARDNET=${ENABLE_HARDNET:=false}
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ENABLE_IPTABLES=${ENABLE_IPTABLES:=false}
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# Image chroot path
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R=${BUILDDIR}/chroot
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# Packages required for bootstrapping
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REQUIRED_PACKAGES="debootstrap debian-archive-keyring qemu-user-static dosfstools rsync bmap-tools whois git-core"
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# Missing packages that need to be installed
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MISSING_PACKAGES=""
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# Packages required in the chroot build environment
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APT_INCLUDES="apt-transport-https,ca-certificates,debian-archive-keyring,dialog,sudo"
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set +x
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# Are we running as root?
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if [ "$(id -u)" -ne "0" ] ; then
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echo "this script must be executed with root privileges"
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exit 1
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fi
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# Check if all required packages are installed
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for package in $REQUIRED_PACKAGES ; do
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if [ "`dpkg-query -W -f='${Status}' $package`" != "install ok installed" ] ; then
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MISSING_PACKAGES="$MISSING_PACKAGES $package"
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fi
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done
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# Ask if missing packages should get installed right now
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if [ -n "$MISSING_PACKAGES" ] ; then
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echo "the following packages needed by this script are not installed:"
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echo "$MISSING_PACKAGES"
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echo -n "\ndo you want to install the missing packages right now? [y/n] "
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read confirm
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if [ "$confirm" != "y" ] ; then
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exit 1
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fi
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fi
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# Make sure all required packages are installed
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apt-get -qq -y install ${REQUIRED_PACKAGES}
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# Don't clobber an old build
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if [ -e "$BUILDDIR" ]; then
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echo "directory $BUILDDIR already exists, not proceeding"
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exit 1
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fi
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set -x
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# Call "cleanup" function on various signals and errors
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trap cleanup 0 1 2 3 6
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# Set up chroot directory
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mkdir -p $R
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# Add required packages for the minbase installation
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if [ "$ENABLE_MINBASE" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},vim-tiny,netbase,net-tools"
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else
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APT_INCLUDES="${APT_INCLUDES},locales"
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fi
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# Add dbus package, recommended if using systemd
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if [ "$ENABLE_DBUS" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},dbus"
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fi
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# Add iptables IPv4/IPv6 package
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if [ "$ENABLE_IPTABLES" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},iptables"
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fi
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# Add openssh server package
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if [ "$ENABLE_SSHD" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},openssh-server"
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fi
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# Add alsa-utils package
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if [ "$ENABLE_SOUND" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},alsa-utils"
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fi
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# Add rng-tools package
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if [ "$ENABLE_HWRANDOM" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},rng-tools"
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fi
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# Add fbturbo video driver
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if [ "$ENABLE_FBTURBO" = true ] ; then
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# Enable xorg package dependencies
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ENABLE_XORG=true
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fi
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# Add user defined window manager package
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if [ -n "$ENABLE_WM" ] ; then
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APT_INCLUDES="${APT_INCLUDES},${ENABLE_WM}"
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# Enable xorg package dependencies
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ENABLE_XORG=true
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fi
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# Add xorg package
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if [ "$ENABLE_XORG" = true ] ; then
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APT_INCLUDES="${APT_INCLUDES},xorg"
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fi
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# Set empty proxy string
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if [ -z "$APT_PROXY" ] ; then
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APT_PROXY="http://"
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fi
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# Base debootstrap (unpack only)
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if [ "$ENABLE_MINBASE" = true ] ; then
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debootstrap --arch=armhf --variant=minbase --foreign --include=${APT_INCLUDES} $RELEASE $R ${APT_PROXY}${APT_SERVER}/debian
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else
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debootstrap --arch=armhf --foreign --include=${APT_INCLUDES} $RELEASE $R ${APT_PROXY}${APT_SERVER}/debian
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fi
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# Copy qemu emulator binary to chroot
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cp /usr/bin/qemu-arm-static $R/usr/bin
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# Copy debian-archive-keyring.pgp
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chroot $R mkdir -p /usr/share/keyrings
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cp /usr/share/keyrings/debian-archive-keyring.gpg $R/usr/share/keyrings/debian-archive-keyring.gpg
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# Complete the bootstrapping process
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chroot $R /debootstrap/debootstrap --second-stage
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# Mount required filesystems
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mount -t proc none $R/proc
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mount -t sysfs none $R/sys
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mount --bind /dev/pts $R/dev/pts
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# Use proxy inside chroot
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if [ -z "$APT_PROXY" ] ; then
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echo "Acquire::http::Proxy \"$APT_PROXY\"" >> $R/etc/apt/apt.conf.d/10proxy
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fi
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# Pin package flash-kernel to repositories.collabora.co.uk
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cat <<EOM >$R/etc/apt/preferences.d/flash-kernel
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Package: flash-kernel
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Pin: origin repositories.collabora.co.uk
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Pin-Priority: 1000
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EOM
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# Set up timezone
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echo ${TIMEZONE} >$R/etc/timezone
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LANG=C chroot $R dpkg-reconfigure -f noninteractive tzdata
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# Set up default locales to "en_US.UTF-8" default
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if [ "$ENABLE_MINBASE" = false ] ; then
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LANG=C chroot $R sed -i '/${DEFLOCAL}/s/^#//' /etc/locale.gen
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LANG=C chroot $R locale-gen ${DEFLOCAL}
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fi
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# Upgrade collabora package index and install collabora keyring
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echo "deb https://repositories.collabora.co.uk/debian ${RELEASE} rpi2" >$R/etc/apt/sources.list
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LANG=C chroot $R apt-get -qq -y update
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LANG=C chroot $R apt-get -qq -y --force-yes install collabora-obs-archive-keyring
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# Set up initial sources.list
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cat <<EOM >$R/etc/apt/sources.list
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deb http://${APT_SERVER}/debian ${RELEASE} main contrib
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#deb-src http://${APT_SERVER}/debian ${RELEASE} main contrib
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deb http://${APT_SERVER}/debian/ ${RELEASE}-updates main contrib
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#deb-src http://${APT_SERVER}/debian/ ${RELEASE}-updates main contrib
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deb http://security.debian.org/ ${RELEASE}/updates main contrib
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#deb-src http://security.debian.org/ ${RELEASE}/updates main contrib
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deb https://repositories.collabora.co.uk/debian ${RELEASE} rpi2
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EOM
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# Upgrade package index and update all installed packages and changed dependencies
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LANG=C chroot $R apt-get -qq -y update
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LANG=C chroot $R apt-get -qq -y -u dist-upgrade
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# Kernel installation
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# Install flash-kernel last so it doesn't try (and fail) to detect the platform in the chroot
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LANG=C chroot $R apt-get -qq -y --no-install-recommends install linux-image-3.18.0-trunk-rpi2
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LANG=C chroot $R apt-get -qq -y install flash-kernel
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VMLINUZ="$(ls -1 $R/boot/vmlinuz-* | sort | tail -n 1)"
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[ -z "$VMLINUZ" ] && exit 1
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mkdir -p $R/boot/firmware
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# required boot binaries from raspberry/firmware github (commit: "kernel: Bump to 3.18.10")
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wget -q -O $R/boot/firmware/bootcode.bin https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/bootcode.bin
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wget -q -O $R/boot/firmware/fixup_cd.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup_cd.dat
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wget -q -O $R/boot/firmware/fixup.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup.dat
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wget -q -O $R/boot/firmware/fixup_x.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup_x.dat
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wget -q -O $R/boot/firmware/start_cd.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start_cd.elf
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wget -q -O $R/boot/firmware/start.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start.elf
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wget -q -O $R/boot/firmware/start_x.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start_x.elf
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cp $VMLINUZ $R/boot/firmware/kernel7.img
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# Set up IPv4 hosts
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echo ${HOSTNAME} >$R/etc/hostname
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cat <<EOM >$R/etc/hosts
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127.0.0.1 localhost
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127.0.1.1 ${HOSTNAME}
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EOM
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# Set up IPv6 hosts
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if [ "$ENABLE_IPV6" = true ] ; then
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cat <<EOM >>$R/etc/hosts
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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EOM
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fi
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# Place hint about network configuration
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cat <<EOM >$R/etc/network/interfaces
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# Debian switched to systemd-networkd configuration files.
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# please configure your networks in '/etc/systemd/network/'
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EOM
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# Enable systemd-networkd DHCP configuration for interface eth0
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cat <<EOM >$R/etc/systemd/network/eth.network
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[Match]
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Name=eth0
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[Network]
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DHCP=yes
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EOM
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# Set DHCP configuration to IPv4 only
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if [ "$ENABLE_IPV6" = false ] ; then
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sed -i "s/=yes/=v4/" $R/etc/systemd/network/eth.network
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fi
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# Enable systemd-networkd service
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LANG=C chroot $R systemctl enable systemd-networkd
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# Generate crypt(3) password string
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ENCRYPTED_PASSWORD=`mkpasswd -m sha-512 ${PASSWORD}`
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# Set up default user
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LANG=C chroot $R adduser --gecos "Raspberry PI user" --add_extra_groups --disabled-password pi
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LANG=C chroot $R usermod -a -G sudo -p "${ENCRYPTED_PASSWORD}" pi
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# Set up root password
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LANG=C chroot $R usermod -p "${ENCRYPTED_PASSWORD}" root
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# Set up firmware boot cmdline
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CMDLINE="dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2 rootfstype=ext4 rootflags=commit=100,data=writeback elevator=deadline rootwait net.ifnames=1 console=tty1"
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# Set up serial console support (if requested)
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if [ "$ENABLE_CONSOLE" = true ] ; then
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CMDLINE="${CMDLINE} console=ttyAMA0,115200 kgdboc=ttyAMA0,115200"
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fi
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# Set up IPv6 networking support
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if [ "$ENABLE_IPV6" = false ] ; then
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CMDLINE="${CMDLINE} ipv6.disable=1"
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fi
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echo "${CMDLINE}" >$R/boot/firmware/cmdline.txt
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# Set up firmware config
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cat <<EOM >$R/boot/firmware/config.txt
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# For more options and information see
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# http://www.raspberrypi.org/documentation/configuration/config-txt.md
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# Some settings may impact device functionality. See link above for details
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# uncomment if you get no picture on HDMI for a default "safe" mode
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#hdmi_safe=1
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# uncomment this if your display has a black border of unused pixels visible
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# and your display can output without overscan
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#disable_overscan=1
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# uncomment the following to adjust overscan. Use positive numbers if console
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# goes off screen, and negative if there is too much border
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#overscan_left=16
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#overscan_right=16
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#overscan_top=16
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#overscan_bottom=16
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# uncomment to force a console size. By default it will be display's size minus
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# overscan.
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#framebuffer_width=1280
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#framebuffer_height=720
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# uncomment if hdmi display is not detected and composite is being output
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#hdmi_force_hotplug=1
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# uncomment to force a specific HDMI mode (this will force VGA)
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#hdmi_group=1
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#hdmi_mode=1
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# uncomment to force a HDMI mode rather than DVI. This can make audio work in
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# DMT (computer monitor) modes
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#hdmi_drive=2
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# uncomment to increase signal to HDMI, if you have interference, blanking, or
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# no display
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#config_hdmi_boost=4
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# uncomment for composite PAL
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#sdtv_mode=2
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# uncomment to overclock the arm. 700 MHz is the default.
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#arm_freq=800
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EOM
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# Load snd_bcm2835 kernel module at boot time
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if [ "$ENABLE_SOUND" = true ] ; then
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echo "snd_bcm2835" >>$R/etc/modules
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fi
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# Set smallest possible GPU memory allocation size: 16MB (no X)
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if [ "$ENABLE_MINGPU" = true ] ; then
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echo "gpu_mem=16" >>$R/boot/firmware/config.txt
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fi
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# Create symlinks
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ln -sf firmware/config.txt $R/boot/config.txt
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ln -sf firmware/cmdline.txt $R/boot/cmdline.txt
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# Prepare modules-load.d directory
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mkdir -p $R/lib/modules-load.d/
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|
# Load random module on boot
|
|
|
if [ "$ENABLE_HWRANDOM" = true ] ; then
|
|
|
cat <<EOM >$R/lib/modules-load.d/rpi2.conf
|
|
|
bcm2708_rng
|
|
|
EOM
|
|
|
fi
|
|
|
|
|
|
# Prepare modprobe.d directory
|
|
|
mkdir -p $R/etc/modprobe.d/
|
|
|
|
|
|
# Blacklist sound modules
|
|
|
cat <<EOM >$R/etc/modprobe.d/raspi-blacklist.conf
|
|
|
blacklist snd_soc_core
|
|
|
blacklist snd_pcm
|
|
|
blacklist snd_pcm_dmaengine
|
|
|
blacklist snd_timer
|
|
|
blacklist snd_compress
|
|
|
blacklist snd_soc_pcm512x_i2c
|
|
|
blacklist snd_soc_pcm512x
|
|
|
blacklist snd_soc_tas5713
|
|
|
blacklist snd_soc_wm8804
|
|
|
EOM
|
|
|
|
|
|
# Create default fstab
|
|
|
cat <<EOM >$R/etc/fstab
|
|
|
/dev/mmcblk0p2 / ext4 noatime,nodiratime,errors=remount-ro,discard,data=writeback,commit=100 0 1
|
|
|
/dev/mmcblk0p1 /boot/firmware vfat defaults,noatime,nodiratime 0 2
|
|
|
EOM
|
|
|
|
|
|
# Avoid swapping and increase cache sizes
|
|
|
cat <<EOM >>$R/etc/sysctl.d/99-sysctl.conf
|
|
|
|
|
|
# Avoid swapping and increase cache sizes
|
|
|
vm.swappiness=1
|
|
|
vm.dirty_background_ratio=20
|
|
|
vm.dirty_ratio=40
|
|
|
vm.dirty_writeback_centisecs=500
|
|
|
vm.dirty_expire_centisecs=6000
|
|
|
EOM
|
|
|
|
|
|
# Enable network stack hardening
|
|
|
if [ "$ENABLE_HARDNET" = true ] ; then
|
|
|
cat <<EOM >>$R/etc/sysctl.d/99-sysctl.conf
|
|
|
|
|
|
# Enable network stack hardening
|
|
|
net.ipv4.tcp_timestamps=0
|
|
|
net.ipv4.tcp_syncookies=1
|
|
|
net.ipv4.conf.all.rp_filter=1
|
|
|
net.ipv4.conf.all.accept_redirects=0
|
|
|
net.ipv4.conf.all.send_redirects=0
|
|
|
net.ipv4.conf.all.accept_source_route=0
|
|
|
net.ipv4.conf.default.rp_filter=1
|
|
|
net.ipv4.conf.default.accept_redirects=0
|
|
|
net.ipv4.conf.default.send_redirects=0
|
|
|
net.ipv4.conf.default.accept_source_route=0
|
|
|
net.ipv4.conf.lo.accept_redirects=0
|
|
|
net.ipv4.conf.lo.send_redirects=0
|
|
|
net.ipv4.conf.lo.accept_source_route=0
|
|
|
net.ipv4.conf.eth0.accept_redirects=0
|
|
|
net.ipv4.conf.eth0.send_redirects=0
|
|
|
net.ipv4.conf.eth0.accept_source_route=0
|
|
|
net.ipv4.icmp_echo_ignore_broadcasts=1
|
|
|
net.ipv4.icmp_ignore_bogus_error_responses=1
|
|
|
|
|
|
net.ipv6.conf.all.accept_redirects=0
|
|
|
net.ipv6.conf.all.accept_source_route=0
|
|
|
net.ipv6.conf.all.router_solicitations=0
|
|
|
net.ipv6.conf.all.accept_ra_rtr_pref=0
|
|
|
net.ipv6.conf.all.accept_ra_pinfo=0
|
|
|
net.ipv6.conf.all.accept_ra_defrtr=0
|
|
|
net.ipv6.conf.all.autoconf=0
|
|
|
net.ipv6.conf.all.dad_transmits=0
|
|
|
net.ipv6.conf.all.max_addresses=1
|
|
|
|
|
|
net.ipv6.conf.default.accept_redirects=0
|
|
|
net.ipv6.conf.default.accept_source_route=0
|
|
|
net.ipv6.conf.default.router_solicitations=0
|
|
|
net.ipv6.conf.default.accept_ra_rtr_pref=0
|
|
|
net.ipv6.conf.default.accept_ra_pinfo=0
|
|
|
net.ipv6.conf.default.accept_ra_defrtr=0
|
|
|
net.ipv6.conf.default.autoconf=0
|
|
|
net.ipv6.conf.default.dad_transmits=0
|
|
|
net.ipv6.conf.default.max_addresses=1
|
|
|
|
|
|
net.ipv6.conf.lo.accept_redirects=0
|
|
|
net.ipv6.conf.lo.accept_source_route=0
|
|
|
net.ipv6.conf.lo.router_solicitations=0
|
|
|
net.ipv6.conf.lo.accept_ra_rtr_pref=0
|
|
|
net.ipv6.conf.lo.accept_ra_pinfo=0
|
|
|
net.ipv6.conf.lo.accept_ra_defrtr=0
|
|
|
net.ipv6.conf.lo.autoconf=0
|
|
|
net.ipv6.conf.lo.dad_transmits=0
|
|
|
net.ipv6.conf.lo.max_addresses=1
|
|
|
|
|
|
net.ipv6.conf.eth0.accept_redirects=0
|
|
|
net.ipv6.conf.eth0.accept_source_route=0
|
|
|
net.ipv6.conf.eth0.router_solicitations=0
|
|
|
net.ipv6.conf.eth0.accept_ra_rtr_pref=0
|
|
|
net.ipv6.conf.eth0.accept_ra_pinfo=0
|
|
|
net.ipv6.conf.eth0.accept_ra_defrtr=0
|
|
|
net.ipv6.conf.eth0.autoconf=0
|
|
|
net.ipv6.conf.eth0.dad_transmits=0
|
|
|
net.ipv6.conf.eth0.max_addresses=1
|
|
|
EOM
|
|
|
|
|
|
# Enable resolver warnings about spoofed addresses
|
|
|
cat <<EOM >>$R/etc/host.conf
|
|
|
spoof warn
|
|
|
EOM
|
|
|
fi
|
|
|
|
|
|
# Regenerate openssh server host keys
|
|
|
if [ "$ENABLE_SSHD" = true ] ; then
|
|
|
rm -fr $R/etc/ssh/ssh_host_*
|
|
|
LANG=C chroot $R dpkg-reconfigure openssh-server
|
|
|
fi
|
|
|
|
|
|
# Enable serial console systemd style
|
|
|
if [ "$ENABLE_CONSOLE" = true ] ; then
|
|
|
LANG=C chroot $R systemctl enable serial-getty\@ttyAMA0.service
|
|
|
fi
|
|
|
|
|
|
# Enable firewall based on iptables started by systemd service
|
|
|
if [ "$ENABLE_IPTABLES" = true ] ; then
|
|
|
# Create iptables configuration directory
|
|
|
mkdir -p "$R/etc/iptables"
|
|
|
|
|
|
# Create iptables systemd service
|
|
|
cat <<EOM >$R/etc/systemd/system/iptables.service
|
|
|
[Unit]
|
|
|
Description=Packet Filtering Framework
|
|
|
DefaultDependencies=no
|
|
|
After=systemd-sysctl.service
|
|
|
Before=sysinit.target
|
|
|
[Service]
|
|
|
Type=oneshot
|
|
|
ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules
|
|
|
ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules
|
|
|
ExecStop=/etc/iptables/flush-iptables.sh
|
|
|
RemainAfterExit=yes
|
|
|
[Install]
|
|
|
WantedBy=multi-user.target
|
|
|
EOM
|
|
|
|
|
|
# Create flush-table script called by iptables service
|
|
|
cat <<EOM >$R/etc/iptables/flush-iptables.sh
|
|
|
#!/bin/sh
|
|
|
iptables -F
|
|
|
iptables -X
|
|
|
iptables -t nat -F
|
|
|
iptables -t nat -X
|
|
|
iptables -t mangle -F
|
|
|
iptables -t mangle -X
|
|
|
iptables -P INPUT ACCEPT
|
|
|
iptables -P FORWARD ACCEPT
|
|
|
iptables -P OUTPUT ACCEPT
|
|
|
EOM
|
|
|
|
|
|
# Create iptables rule file
|
|
|
cat <<EOM >$R/etc/iptables/iptables.rules
|
|
|
*filter
|
|
|
:INPUT DROP [0:0]
|
|
|
:FORWARD DROP [0:0]
|
|
|
:OUTPUT ACCEPT [0:0]
|
|
|
:TCP - [0:0]
|
|
|
:UDP - [0:0]
|
|
|
:SSH - [0:0]
|
|
|
|
|
|
# Rate limit ping requests
|
|
|
-A INPUT -p icmp --icmp-type echo-request -m limit --limit 30/min --limit-burst 8 -j ACCEPT
|
|
|
-A INPUT -p icmp --icmp-type echo-request -j DROP
|
|
|
|
|
|
# Accept established connections
|
|
|
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
|
|
|
|
|
|
# Accept all traffic on loopback interface
|
|
|
-A INPUT -i lo -j ACCEPT
|
|
|
|
|
|
# Drop packets declared invalid
|
|
|
-A INPUT -m conntrack --ctstate INVALID -j DROP
|
|
|
|
|
|
# SSH rate limiting
|
|
|
-A INPUT -p tcp --dport ssh -m conntrack --ctstate NEW -j SSH
|
|
|
-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 3 --seconds 10 -j DROP
|
|
|
-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 20 --seconds 1800 -j DROP
|
|
|
-A SSH -m recent --name sshbf --set -j ACCEPT
|
|
|
|
|
|
# Send TCP and UDP connections to their respective rules chain
|
|
|
-A INPUT -p udp -m conntrack --ctstate NEW -j UDP
|
|
|
-A INPUT -p tcp --syn -m conntrack --ctstate NEW -j TCP
|
|
|
|
|
|
# Reject dropped packets with a RFC compliant responce
|
|
|
-A INPUT -p udp -j REJECT --reject-with icmp-port-unreachable
|
|
|
-A INPUT -p tcp -j REJECT --reject-with tcp-rst
|
|
|
-A INPUT -j REJECT --reject-with icmp-proto-unreachable
|
|
|
|
|
|
## TCP PORT RULES
|
|
|
# -A TCP -p tcp -j LOG
|
|
|
|
|
|
## UDP PORT RULES
|
|
|
# -A UDP -p udp -j LOG
|
|
|
|
|
|
COMMIT
|
|
|
EOM
|
|
|
|
|
|
# Reload systemd configuration and enable iptables service
|
|
|
LANG=C chroot $R systemctl daemon-reload
|
|
|
LANG=C chroot $R systemctl enable iptables.service
|
|
|
|
|
|
if [ "$ENABLE_IPV6" = true ] ; then
|
|
|
# Create ip6tables systemd service
|
|
|
cat <<EOM >$R/etc/systemd/system/ip6tables.service
|
|
|
[Unit]
|
|
|
Description=Packet Filtering Framework
|
|
|
DefaultDependencies=no
|
|
|
After=systemd-sysctl.service
|
|
|
Before=sysinit.target
|
|
|
[Service]
|
|
|
Type=oneshot
|
|
|
ExecStart=/sbin/ip6tables-restore /etc/iptables/ip6tables.rules
|
|
|
ExecReload=/sbin/ip6tables-restore /etc/iptables/ip6tables.rules
|
|
|
ExecStop=/etc/iptables/flush-ip6tables.sh
|
|
|
RemainAfterExit=yes
|
|
|
[Install]
|
|
|
WantedBy=multi-user.target
|
|
|
EOM
|
|
|
|
|
|
# Create ip6tables file
|
|
|
cat <<EOM >$R/etc/iptables/flush-ip6tables.sh
|
|
|
#!/bin/sh
|
|
|
ip6tables -F
|
|
|
ip6tables -X
|
|
|
ip6tables -Z
|
|
|
for table in $(</proc/net/ip6_tables_names)
|
|
|
do
|
|
|
ip6tables -t \$table -F
|
|
|
ip6tables -t \$table -X
|
|
|
ip6tables -t \$table -Z
|
|
|
done
|
|
|
ip6tables -P INPUT ACCEPT
|
|
|
ip6tables -P OUTPUT ACCEPT
|
|
|
ip6tables -P FORWARD ACCEPT
|
|
|
EOM
|
|
|
|
|
|
# Create ip6tables rule file
|
|
|
cat <<EOM >$R/etc/iptables/ip6tables.rules
|
|
|
*filter
|
|
|
:INPUT DROP [0:0]
|
|
|
:FORWARD DROP [0:0]
|
|
|
:OUTPUT ACCEPT [0:0]
|
|
|
:TCP - [0:0]
|
|
|
:UDP - [0:0]
|
|
|
:SSH - [0:0]
|
|
|
|
|
|
# Drop packets with RH0 headers
|
|
|
-A INPUT -m rt --rt-type 0 -j DROP
|
|
|
-A OUTPUT -m rt --rt-type 0 -j DROP
|
|
|
-A FORWARD -m rt --rt-type 0 -j DROP
|
|
|
|
|
|
# Rate limit ping requests
|
|
|
-A INPUT -p icmpv6 --icmpv6-type echo-request -m limit --limit 30/min --limit-burst 8 -j ACCEPT
|
|
|
-A INPUT -p icmpv6 --icmpv6-type echo-request -j DROP
|
|
|
|
|
|
# Accept established connections
|
|
|
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
|
|
|
|
|
|
# Accept all traffic on loopback interface
|
|
|
-A INPUT -i lo -j ACCEPT
|
|
|
|
|
|
# Drop packets declared invalid
|
|
|
-A INPUT -m conntrack --ctstate INVALID -j DROP
|
|
|
|
|
|
# SSH rate limiting
|
|
|
-A INPUT -p tcp --dport ssh -m conntrack --ctstate NEW -j SSH
|
|
|
-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 3 --seconds 10 -j DROP
|
|
|
-A SSH -m recent --name sshbf --rttl --rcheck --hitcount 20 --seconds 1800 -j DROP
|
|
|
-A SSH -m recent --name sshbf --set -j ACCEPT
|
|
|
|
|
|
# Send TCP and UDP connections to their respective rules chain
|
|
|
-A INPUT -p udp -m conntrack --ctstate NEW -j UDP
|
|
|
-A INPUT -p tcp --syn -m conntrack --ctstate NEW -j TCP
|
|
|
|
|
|
# Reject dropped packets with a RFC compliant responce
|
|
|
-A INPUT -p udp -j REJECT --reject-with icmp6-adm-prohibited
|
|
|
-A INPUT -p tcp -j REJECT --reject-with icmp6-adm-prohibited
|
|
|
-A INPUT -j REJECT --reject-with icmp6-adm-prohibited
|
|
|
|
|
|
## TCP PORT RULES
|
|
|
# -A TCP -p tcp -j LOG
|
|
|
|
|
|
## UDP PORT RULES
|
|
|
# -A UDP -p udp -j LOG
|
|
|
|
|
|
COMMIT
|
|
|
EOM
|
|
|
|
|
|
# Reload systemd configuration and enable iptables service
|
|
|
LANG=C chroot $R systemctl daemon-reload
|
|
|
LANG=C chroot $R systemctl enable ip6tables.service
|
|
|
fi
|
|
|
fi
|
|
|
|
|
|
# Remove SSHD related iptables rules
|
|
|
if [ "$ENABLE_SSHD" = false ] ; then
|
|
|
sed -e '/^#/! {/SSH/ s/^/# /}' -i $R/etc/iptables/iptables.rules 2> /dev/null
|
|
|
sed -e '/^#/! {/SSH/ s/^/# /}' -i $R/etc/iptables/ip6tables.rules 2> /dev/null
|
|
|
fi
|
|
|
|
|
|
# Install gcc/c++ build environment inside the chroot
|
|
|
if [ "$ENABLE_UBOOT" = true ] || [ "$ENABLE_FBTURBO" = true ]; then
|
|
|
LANG=C chroot $R apt-get install -q -y --force-yes --no-install-recommends linux-compiler-gcc-4.9-arm g++ make bc
|
|
|
fi
|
|
|
|
|
|
# Fetch and build U-Boot bootloader
|
|
|
if [ "$ENABLE_UBOOT" = true ] ; then
|
|
|
# Fetch U-Boot bootloader sources
|
|
|
git -C $R/tmp clone git://git.denx.de/u-boot.git
|
|
|
|
|
|
# Build and install U-Boot inside chroot
|
|
|
LANG=C chroot $R make -C /tmp/u-boot/ rpi_2_defconfig all
|
|
|
|
|
|
# Copy compiled bootloader binary and set config.txt to load it
|
|
|
cp $R/tmp/u-boot/u-boot.bin $R/boot/firmware/
|
|
|
printf "\n# boot u-boot kernel\nkernel=u-boot.bin\n" >> $R/boot/firmware/config.txt
|
|
|
|
|
|
# Set U-Boot command file
|
|
|
cat <<EOM >$R/boot/firmware/uboot.mkimage
|
|
|
# Tell Linux that it is booting on a Raspberry Pi2
|
|
|
setenv machid 0x00000c42
|
|
|
|
|
|
# Set the kernel boot command line
|
|
|
setenv bootargs "earlyprintk ${CMDLINE}"
|
|
|
|
|
|
# Save these changes to u-boot's environment
|
|
|
saveenv
|
|
|
|
|
|
# Load the existing Linux kernel into RAM
|
|
|
fatload mmc 0:1 \${kernel_addr_r} kernel7.img
|
|
|
|
|
|
# Boot the kernel we have just loaded
|
|
|
bootz \${kernel_addr_r}
|
|
|
EOM
|
|
|
|
|
|
# Generate U-Boot image from command file
|
|
|
LANG=C chroot $R mkimage -A arm -O linux -T script -C none -a 0x00000000 -e 0x00000000 -n "RPi2 Boot Script" -d /boot/firmware/uboot.mkimage /boot/firmware/boot.scr
|
|
|
fi
|
|
|
|
|
|
# Fetch and build fbturbo Xorg driver
|
|
|
if [ "$ENABLE_FBTURBO" = true ] ; then
|
|
|
# Fetch fbturbo driver sources
|
|
|
git -C $R/tmp clone https://github.com/ssvb/xf86-video-fbturbo.git
|
|
|
|
|
|
# Install Xorg build dependencies
|
|
|
LANG=C chroot $R apt-get install -q -y --no-install-recommends xorg-dev xutils-dev x11proto-dri2-dev libltdl-dev libtool automake libdrm-dev
|
|
|
|
|
|
# Build and install fbturbo driver inside chroot
|
|
|
LANG=C chroot $R /bin/bash -c "cd /tmp/xf86-video-fbturbo; autoreconf -vi; ./configure --prefix=/usr; make; make install"
|
|
|
|
|
|
# Add fbturbo driver to Xorg configuration
|
|
|
cat <<EOM >$R/usr/share/X11/xorg.conf.d/99-fbturbo.conf
|
|
|
Section "Device"
|
|
|
Identifier "Allwinner A10/A13 FBDEV"
|
|
|
Driver "fbturbo"
|
|
|
Option "fbdev" "/dev/fb0"
|
|
|
Option "SwapbuffersWait" "true"
|
|
|
EndSection
|
|
|
EOM
|
|
|
|
|
|
# Remove Xorg build dependencies
|
|
|
LANG=C chroot $R apt-get -q -y purge --auto-remove xorg-dev xutils-dev x11proto-dri2-dev libltdl-dev libtool automake libdrm-dev
|
|
|
fi
|
|
|
|
|
|
# Remove gcc/c++ build environment from the chroot
|
|
|
if [ "$ENABLE_UBOOT" = true ] || [ "$ENABLE_FBTURBO" = true ]; then
|
|
|
LANG=C chroot $R apt-get -y -q purge --auto-remove bc binutils cpp cpp-4.9 g++ g++-4.9 gcc gcc-4.9 libasan1 libatomic1 libc-dev-bin libc6-dev libcloog-isl4 libgcc-4.9-dev libgomp1 libisl10 libmpc3 libmpfr4 libstdc++-4.9-dev libubsan0 linux-compiler-gcc-4.9-arm linux-libc-dev make
|
|
|
fi
|
|
|
|
|
|
# Clean cached downloads
|
|
|
LANG=C chroot $R apt-get -y clean
|
|
|
LANG=C chroot $R apt-get -y autoclean
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|
|
LANG=C chroot $R apt-get -y autoremove
|
|
|
|
|
|
# Unmount mounted filesystems
|
|
|
umount -l $R/proc
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|
|
umount -l $R/sys
|
|
|
|
|
|
# Clean up files
|
|
|
rm -f $R/etc/apt/sources.list.save
|
|
|
rm -f $R/etc/resolvconf/resolv.conf.d/original
|
|
|
rm -rf $R/run
|
|
|
mkdir -p $R/run
|
|
|
rm -f $R/etc/*-
|
|
|
rm -f $R/root/.bash_history
|
|
|
rm -rf $R/tmp/*
|
|
|
rm -f $R/var/lib/urandom/random-seed
|
|
|
[ -L $R/var/lib/dbus/machine-id ] || rm -f $R/var/lib/dbus/machine-id
|
|
|
rm -f $R/etc/machine-id
|
|
|
rm -fr $R/etc/apt/apt.conf.d/10proxy
|
|
|
|
|
|
# Calculate size of the chroot directory
|
|
|
CHROOT_SIZE=$(expr `du -s $R | awk '{ print $1 }'` / 1024)
|
|
|
|
|
|
# Calculate required image size
|
|
|
IMAGE_SIZE=`expr $(expr ${CHROOT_SIZE} / 1024 + 1) \* 1024`
|
|
|
|
|
|
# Calculate number of sectors for the partition
|
|
|
IMAGE_SECTORS=`expr $(expr ${IMAGE_SIZE} \* 1048576) / 512 - 133120`
|
|
|
|
|
|
# Prepare date string for image file name
|
|
|
DATE="$(date +%Y-%m-%d)"
|
|
|
|
|
|
# Prepare image file
|
|
|
dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=1M count=1
|
|
|
dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=1M count=0 seek=${IMAGE_SIZE}
|
|
|
|
|
|
# Write partition table
|
|
|
sfdisk -q -L -f "$BASEDIR/${DATE}-debian-${RELEASE}.img" <<EOM
|
|
|
unit: sectors
|
|
|
|
|
|
1 : start= 2048, size= 131072, Id= c, bootable
|
|
|
2 : start= 133120, size= ${IMAGE_SECTORS}, Id=83
|
|
|
3 : start= 0, size= 0, Id= 0
|
|
|
4 : start= 0, size= 0, Id= 0
|
|
|
EOM
|
|
|
|
|
|
# Set up temporary loop devices and build filesystems
|
|
|
VFAT_LOOP="$(losetup -o 1M --sizelimit 64M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)"
|
|
|
EXT4_LOOP="$(losetup -o 65M --sizelimit `expr ${IMAGE_SIZE} - 64`M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)"
|
|
|
mkfs.vfat "$VFAT_LOOP"
|
|
|
mkfs.ext4 "$EXT4_LOOP"
|
|
|
|
|
|
# Mount the temporary loop devices
|
|
|
mkdir -p "$BUILDDIR/mount"
|
|
|
mount "$EXT4_LOOP" "$BUILDDIR/mount"
|
|
|
|
|
|
mkdir -p "$BUILDDIR/mount/boot/firmware"
|
|
|
mount "$VFAT_LOOP" "$BUILDDIR/mount/boot/firmware"
|
|
|
|
|
|
# Copy all files from the chroot to the loop device mount point directory
|
|
|
rsync -a "$R/" "$BUILDDIR/mount/"
|
|
|
|
|
|
# Unmount all temporary loop devices and mount points
|
|
|
cleanup
|
|
|
|
|
|
# (optinal) create block map file for "bmaptool"
|
|
|
bmaptool create -o "$BASEDIR/${DATE}-debian-${RELEASE}.bmap" "$BASEDIR/${DATE}-debian-${RELEASE}.img"
|
|
|
|
|
|
# Image was successfully created
|
|
|
echo "$BASEDIR/${DATE}-debian-${RELEASE}.img (${IMAGE_SIZE})" ": successfully created"
|
|
|
|
