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1 | #!/bin/sh | |
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2 | ||
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3 | ######################################################################## | |
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4 | # rpi2-gen-image.sh ver2a 12/2015 | |
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5 | # | |
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6 | # Advanced debian "jessie" bootstrap script for RPi2 | |
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7 | # | |
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8 | # This program is free software; you can redistribute it and/or | |
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9 | # modify it under the terms of the GNU General Public License | |
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10 | # as published by the Free Software Foundation; either version 2 | |
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11 | # of the License, or (at your option) any later version. | |
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12 | # | |
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13 | # some parts based on rpi2-build-image: | |
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14 | # Copyright (C) 2015 Ryan Finnie <ryan@finnie.org> | |
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15 | # Copyright (C) 2015 Luca Falavigna <dktrkranz@debian.org> | |
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16 | ######################################################################## | |
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17 | ||
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18 | cleanup (){ | |
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19 | set +x | |
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20 | set +e | |
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21 | echo "removing temporary mount points ..." | |
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22 | umount -l $R/proc 2> /dev/null | |
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23 | umount -l $R/sys 2> /dev/null | |
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24 | umount -l $R/dev/pts 2> /dev/null | |
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25 | umount "$BUILDDIR/mount/boot/firmware" 2> /dev/null | |
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26 | umount "$BUILDDIR/mount" 2> /dev/null | |
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27 | losetup -d "$EXT4_LOOP" 2> /dev/null | |
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28 | losetup -d "$VFAT_LOOP" 2> /dev/null | |
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29 | trap - 0 1 2 3 6 | |
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30 | } | |
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31 | ||
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32 | set -e | |
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33 | set -x | |
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34 | ||
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35 | RELEASE=${RELEASE:=jessie} | |
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36 | ||
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37 | # Build settings | |
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38 | BASEDIR=./images/${RELEASE} | |
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39 | BUILDDIR=${BASEDIR}/build | |
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40 | ||
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41 | # General settings | |
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42 | HOSTNAME=${HOSTNAME:=rpi2-${RELEASE}} | |
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43 | PASSWORD=${PASSWORD:=raspberry} | |
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44 | DEFLOCAL=${DEFLOCAL:="en_US.UTF-8"} | |
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45 | TIMEZONE=${TIMEZONE:="Europe/Berlin"} | |
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46 | ||
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47 | # APT settings | |
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48 | APT_PROXY=${APT_PROXY:=""} | |
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49 | APT_SERVER=${APT_SERVER:="ftp.debian.org"} | |
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50 | ||
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51 | # Feature settings | |
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52 | ENABLE_CONSOLE=${ENABLE_CONSOLE:=true} | |
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53 | ENABLE_IPV6=${ENABLE_IPV6:=true} | |
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54 | ENABLE_SSHD=${ENABLE_SSHD:=true} | |
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55 | ENABLE_SOUND=${ENABLE_SOUND:=true} | |
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56 | ENABLE_SYSTEMD=${ENABLE_SYSTEMD:=true} | |
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57 | ENABLE_DBUS=${ENABLE_DBUS:=true} | |
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58 | ENABLE_HWRANDOM=${ENABLE_HWRANDOM:=true} | |
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59 | ENABLE_MINGPU=${ENABLE_MINGPU:=false} | |
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60 | ENABLE_XORG=${ENABLE_XORG:=false} | |
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61 | ENABLE_FLUXBOX=${ENABLE_FLUXBOX:=false} | |
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62 | ||
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63 | # Advanced settings | |
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64 | ENABLE_HARDNET=${ENABLE_HARDNET:=false} | |
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65 | ENABLE_IPTABLES=${ENABLE_IPTABLES:=false} | |
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66 | ||
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67 | # Image chroot path | |
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68 | R=${BUILDDIR}/chroot | |
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69 | ||
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70 | # Packages required for bootstrapping | |
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71 | REQUIRED_PACKAGES="debootstrap debian-archive-keyring qemu-user-static dosfstools rsync bmap-tools whois" | |
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72 | ||
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73 | # Packages required in the chroot build enviroment | |
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74 | APT_INCLUDES="apt-transport-https,ca-certificates,debian-archive-keyring,dialog,locales,apt-utils,vim-tiny" | |
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75 | ||
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76 | set +x | |
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77 | ||
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78 | # Are we running as root? | |
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79 | if [ "$(id -u)" -ne "0" ] ; then | |
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80 | echo "this script must be executed with root privileges" | |
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81 | exit 1 | |
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82 | fi | |
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83 | ||
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84 | # Don't clobber an old build | |
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85 | if [ -e "$BUILDDIR" ]; then | |
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86 | echo "directory $BUILDDIR already exists, not proceeding" | |
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87 | exit 1 | |
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88 | fi | |
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89 | ||
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90 | set -x | |
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91 | ||
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92 | # Call "cleanup" function on various signals and errors | |
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93 | trap cleanup 0 1 2 3 6 | |
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94 | ||
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95 | # Set up chroot directory | |
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96 | mkdir -p $R | |
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97 | ||
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98 | # Install dependencies | |
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99 | apt-get -q -y install ${REQUIRED_PACKAGES} | |
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100 | ||
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101 | # Use traditional SystemV init instead of systemd services | |
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102 | if [ "$ENABLE_SYSTEMD" = false ] ; then | |
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103 | APT_INCLUDES="${APT_INCLUDES},sysvinit-core" | |
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104 | fi | |
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105 | ||
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106 | # Add dbus package, recommended if using systemd | |
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107 | if [ "$ENABLE_DBUS" = true ] ; then | |
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108 | APT_INCLUDES="${APT_INCLUDES},dbus" | |
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109 | fi | |
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110 | ||
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111 | # Add openssh server package | |
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112 | if [ "$ENABLE_SSHD" = true ] ; then | |
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113 | APT_INCLUDES="${APT_INCLUDES},openssh-server" | |
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114 | fi | |
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115 | ||
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116 | # Add rng-tools package | |
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117 | if [ "$ENABLE_HWRANDOM" = true ] ; then | |
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118 | APT_INCLUDES="${APT_INCLUDES},rng-tools" | |
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119 | fi | |
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120 | ||
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121 | # Add xorg package | |
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122 | if [ "$ENABLE_XORG" = true ] ; then | |
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123 | APT_INCLUDES="${APT_INCLUDES},xorg" | |
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124 | fi | |
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125 | ||
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126 | # Add fluxbox package with eterm | |
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127 | if [ "$ENABLE_FLUXBOX" = true ] ; then | |
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128 | APT_INCLUDES="${APT_INCLUDES},fluxbox,eterm" | |
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129 | fi | |
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130 | ||
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131 | if [ -z "$APT_PROXY" ] ; then | |
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132 | APT_PROXY="http://" | |
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133 | fi | |
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134 | ||
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135 | # Base debootstrap (unpack only) | |
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136 | debootstrap --arch=armhf --foreign --include=${APT_INCLUDES} $RELEASE $R ${APT_PROXY}${APT_SERVER}/debian | |
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137 | cp /usr/bin/qemu-arm-static $R/usr/bin | |
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138 | ||
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139 | # Remove systemd releated packages from list of packages to be bootsrapped | |
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140 | if [ "$ENABLE_SYSTEMD" = false ] ; then | |
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141 | chroot $R sed -i -e 's/systemd systemd-sysv //g' /debootstrap/required | |
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142 | fi | |
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143 | ||
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144 | # Copy debian-archive-keyring.pgp | |
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145 | chroot $R mkdir -p /usr/share/keyrings | |
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146 | cp /usr/share/keyrings/debian-archive-keyring.gpg $R/usr/share/keyrings/debian-archive-keyring.gpg | |
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147 | ||
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148 | # Complete the bootstrapping proccess | |
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149 | chroot $R /debootstrap/debootstrap --second-stage | |
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150 | ||
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151 | # Mount required filesystems | |
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152 | mount -t proc none $R/proc | |
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153 | mount -t sysfs none $R/sys | |
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154 | mount --bind /dev/pts $R/dev/pts | |
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155 | ||
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156 | # Set up initial sources.list | |
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157 | cat <<EOM >$R/etc/apt/sources.list | |
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158 | deb http://${APT_SERVER}/debian ${RELEASE} main contrib | |
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159 | #deb-src http://${APT_SERVER}/debian ${RELEASE} main contrib | |
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160 | ||
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161 | deb http://${APT_SERVER}/debian/ ${RELEASE}-updates main contrib | |
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162 | #deb-src http://${APT_SERVER}/debian/ ${RELEASE}-updates main contrib | |
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163 | ||
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164 | deb http://security.debian.org/ ${RELEASE}/updates main contrib | |
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165 | #deb-src http://security.debian.org/ ${RELEASE}/updates main contrib | |
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166 | ||
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167 | deb https://repositories.collabora.co.uk/debian ${RELEASE} rpi2 | |
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168 | EOM | |
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169 | ||
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170 | # Pin package flash-kernel to repositories.collabora.co.uk | |
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171 | cat <<EOM >$R/etc/apt/preferences.d/flash-kernel | |
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172 | Package: flash-kernel | |
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173 | Pin: origin repositories.collabora.co.uk | |
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174 | Pin-Priority: 1000 | |
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175 | EOM | |
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176 | ||
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177 | # Set up timezone | |
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178 | echo ${TIMEZONE} >$R/etc/timezone | |
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179 | LANG=C chroot $R dpkg-reconfigure -f noninteractive tzdata | |
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180 | ||
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181 | # Set up default locales to "en_US.UTF-8" default | |
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182 | LANG=C chroot $R sed -i '/${DEFLOCAL}/s/^#//' /etc/locale.gen | |
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183 | LANG=C chroot $R locale-gen ${DEFLOCAL} | |
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184 | ||
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185 | # Fetch APT public key "Collabora Raspbian Archive Signing Key <daniels@collabora.com>" | |
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186 | LANG=C chroot $R apt-key adv --keyserver hkp://pool.sks-keyservers.net --recv-keys ED4BF9140C50B1C5 | |
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187 | ||
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188 | # Upgrade package index and update all installed packages and changed dependencies | |
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189 | LANG=C chroot $R apt-get -q -y update | |
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190 | LANG=C chroot $R apt-get -q -y -u dist-upgrade | |
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191 | ||
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192 | # Kernel installation | |
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193 | # Install flash-kernel last so it doesn't try (and fail) to detect the platform in the chroot | |
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194 | ||
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195 | LANG=C chroot $R apt-get -q -y --force-yes --no-install-recommends install linux-image-3.18.0-trunk-rpi2 | |
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196 | LANG=C chroot $R apt-get -q -y --force-yes install flash-kernel | |
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197 | ||
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198 | VMLINUZ="$(ls -1 $R/boot/vmlinuz-* | sort | tail -n 1)" | |
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199 | [ -z "$VMLINUZ" ] && exit 1 | |
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200 | mkdir -p $R/boot/firmware | |
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201 | ||
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202 | # required boot binaries from raspberry/firmware github (commit: "kernel: Bump to 3.18.10") | |
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203 | wget -q -O $R/boot/firmware/bootcode.bin https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/bootcode.bin | |
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204 | wget -q -O $R/boot/firmware/fixup_cd.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup_cd.dat | |
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205 | wget -q -O $R/boot/firmware/fixup.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup.dat | |
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206 | wget -q -O $R/boot/firmware/fixup_x.dat https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/fixup_x.dat | |
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207 | wget -q -O $R/boot/firmware/start_cd.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start_cd.elf | |
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208 | wget -q -O $R/boot/firmware/start.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start.elf | |
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209 | wget -q -O $R/boot/firmware/start_x.elf https://github.com/raspberrypi/firmware/raw/cd355a9dd4f1f4de2e79b0c8e102840885cdf1de/boot/start_x.elf | |
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210 | cp $VMLINUZ $R/boot/firmware/kernel7.img | |
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211 | ||
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212 | # Set up hosts | |
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213 | echo ${HOSTNAME} >$R/etc/hostname | |
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214 | cat <<EOM >$R/etc/hosts | |
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215 | 127.0.0.1 localhost | |
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216 | 127.0.1.1 ${HOSTNAME} | |
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217 | EOM | |
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218 | ||
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219 | if [ "$ENABLE_IPV6" = true ] ; then | |
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220 | cat <<EOM >>$R/etc/hosts | |
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221 | ||
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222 | ::1 localhost ip6-localhost ip6-loopback | |
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223 | ff02::1 ip6-allnodes | |
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224 | ff02::2 ip6-allrouters | |
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225 | EOM | |
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226 | fi | |
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227 | ||
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228 | # Generate crypt(3) password string | |
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229 | ENCRYPTED_PASSWORD=`mkpasswd -m sha-512 ${PASSWORD}` | |
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230 | ||
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231 | # Set up default user | |
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232 | LANG=C chroot $R adduser --gecos "Raspberry PI user" --add_extra_groups --disabled-password pi | |
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233 | LANG=C chroot $R usermod -a -G sudo -p "${ENCRYPTED_PASSWORD}" pi | |
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234 | ||
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235 | # Set up root password | |
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236 | LANG=C chroot $R usermod -p "${ENCRYPTED_PASSWORD}" root | |
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237 | ||
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238 | # Clean cached downloads | |
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239 | LANG=C chroot $R apt-get -y clean | |
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240 | LANG=C chroot $R apt-get -y autoclean | |
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241 | LANG=C chroot $R apt-get -y autoremove | |
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242 | ||
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243 | # Set up interfaces | |
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244 | cat <<EOM >$R/etc/network/interfaces | |
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245 | # interfaces(5) file used by ifup(8) and ifdown(8) | |
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246 | # Include files from /etc/network/interfaces.d: | |
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247 | source-directory /etc/network/interfaces.d | |
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248 | ||
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249 | # The loopback network interface | |
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250 | auto lo | |
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251 | iface lo inet loopback | |
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252 | ||
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253 | # The primary network interface | |
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254 | allow-hotplug eth0 | |
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255 | iface eth0 inet dhcp | |
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256 | EOM | |
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257 | ||
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258 | # Set up firmware boot cmdline | |
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259 | 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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260 | ||
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261 | # Set up serial console support (if requested) | |
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262 | if [ "$ENABLE_CONSOLE" = true ] ; then | |
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263 | CMDLINE="${CMDLINE} console=ttyAMA0,115200 kgdboc=ttyAMA0,115200" | |
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264 | fi | |
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265 | ||
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266 | # Set up ipv6 support (if requested) | |
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267 | if [ "$ENABLE_IPV6" = false ] ; then | |
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268 | CMDLINE="${CMDLINE} ipv6.disable=1" | |
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269 | fi | |
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270 | ||
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271 | echo "${CMDLINE}" >$R/boot/firmware/cmdline.txt | |
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272 | ||
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273 | # Set up firmware config | |
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274 | cat <<EOM >$R/boot/firmware/config.txt | |
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275 | # For more options and information see | |
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276 | # http://www.raspberrypi.org/documentation/configuration/config-txt.md | |
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277 | # Some settings may impact device functionality. See link above for details | |
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278 | ||
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279 | # uncomment if you get no picture on HDMI for a default "safe" mode | |
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280 | #hdmi_safe=1 | |
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281 | ||
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282 | # uncomment this if your display has a black border of unused pixels visible | |
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283 | # and your display can output without overscan | |
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284 | #disable_overscan=1 | |
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285 | ||
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286 | # uncomment the following to adjust overscan. Use positive numbers if console | |
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287 | # goes off screen, and negative if there is too much border | |
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288 | #overscan_left=16 | |
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289 | #overscan_right=16 | |
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290 | #overscan_top=16 | |
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291 | #overscan_bottom=16 | |
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292 | ||
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293 | # uncomment to force a console size. By default it will be display's size minus | |
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294 | # overscan. | |
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295 | #framebuffer_width=1280 | |
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296 | #framebuffer_height=720 | |
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297 | ||
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298 | # uncomment if hdmi display is not detected and composite is being output | |
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299 | #hdmi_force_hotplug=1 | |
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300 | ||
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301 | # uncomment to force a specific HDMI mode (this will force VGA) | |
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302 | #hdmi_group=1 | |
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303 | #hdmi_mode=1 | |
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304 | ||
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305 | # uncomment to force a HDMI mode rather than DVI. This can make audio work in | |
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306 | # DMT (computer monitor) modes | |
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307 | #hdmi_drive=2 | |
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308 | ||
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309 | # uncomment to increase signal to HDMI, if you have interference, blanking, or | |
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310 | # no display | |
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311 | #config_hdmi_boost=4 | |
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312 | ||
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313 | # uncomment for composite PAL | |
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314 | #sdtv_mode=2 | |
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315 | ||
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316 | #uncomment to overclock the arm. 700 MHz is the default. | |
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317 | #arm_freq=800 | |
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318 | EOM | |
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319 | ||
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320 | # Set smallest possible GPU memory allocation size: 16MB (no X) | |
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321 | if [ "$ENABLE_MINGPU" = true ] ; then | |
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322 | echo "gpu_mem=16" >>$R/boot/firmware/config.txt | |
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323 | fi | |
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324 | ||
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325 | # Create symlinks | |
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326 | ln -sf firmware/config.txt $R/boot/config.txt | |
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327 | ln -sf firmware/cmdline.txt $R/boot/cmdline.txt | |
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328 | ||
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329 | # Prepare modules-load.d directory | |
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330 | mkdir -p $R/lib/modules-load.d/ | |
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331 | ||
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332 | # Load random module on boot | |
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333 | if [ "$ENABLE_HWRANDOM" = true ] ; then | |
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334 | cat <<EOM >$R/lib/modules-load.d/rpi2.conf | |
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335 | bcm2708_rng | |
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336 | EOM | |
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337 | fi | |
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338 | ||
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339 | # Prepare modprobe.d directory | |
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340 | mkdir -p $R/etc/modprobe.d/ | |
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341 | ||
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342 | # Blacklist sound modules | |
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343 | cat <<EOM >$R/etc/modprobe.d/raspi-blacklist.conf | |
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344 | blacklist snd_soc_core | |
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345 | blacklist snd_pcm | |
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346 | blacklist snd_pcm_dmaengine | |
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347 | blacklist snd_timer | |
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348 | blacklist snd_compress | |
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349 | blacklist snd_soc_pcm512x_i2c | |
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350 | blacklist snd_soc_pcm512x | |
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351 | blacklist snd_soc_tas5713 | |
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352 | blacklist snd_soc_wm8804 | |
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353 | EOM | |
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354 | ||
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355 | # Create default fstab | |
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356 | cat <<EOM >$R/etc/fstab | |
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357 | /dev/mmcblk0p2 / ext4 noatime,nodiratime,errors=remount-ro,discard,data=writeback,commit=100 0 1 | |
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358 | /dev/mmcblk0p1 /boot/firmware vfat defaults,noatime,nodiratime 0 2 | |
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359 | EOM | |
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360 | ||
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361 | # Avoid swapping and increase cache sizes | |
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362 | cat <<EOM >>$R/etc/sysctl.d/99-sysctl.conf | |
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363 | ||
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364 | # Avoid swapping and increase cache sizes | |
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365 | vm.swappiness=1 | |
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366 | vm.dirty_background_ratio=20 | |
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367 | vm.dirty_ratio=40 | |
|
|
368 | vm.dirty_writeback_centisecs=500 | |
|
|
369 | vm.dirty_expire_centisecs=6000 | |
|
|
370 | EOM | |
|
|
371 | ||
|
|
372 | # Enable network stack hardening | |
|
|
373 | if [ "$ENABLE_HARDNET" = true ] ; then | |
|
|
374 | cat <<EOM >>$R/etc/sysctl.d/99-sysctl.conf | |
|
|
375 | ||
|
|
376 | # Enable network stack hardening | |
|
|
377 | net.ipv4.tcp_timestamps=0 | |
|
|
378 | net.ipv4.tcp_syncookies=1 | |
|
|
379 | net.ipv4.conf.all.rp_filter=1 | |
|
|
380 | net.ipv4.conf.all.accept_redirects=0 | |
|
|
381 | net.ipv4.conf.all.send_redirects=0 | |
|
|
382 | net.ipv4.conf.all.accept_source_route=0 | |
|
|
383 | net.ipv4.conf.default.rp_filter=1 | |
|
|
384 | net.ipv4.conf.default.accept_redirects=0 | |
|
|
385 | net.ipv4.conf.default.send_redirects=0 | |
|
|
386 | net.ipv4.conf.default.accept_source_route=0 | |
|
|
387 | net.ipv4.conf.lo.accept_redirects=0 | |
|
|
388 | net.ipv4.conf.lo.send_redirects=0 | |
|
|
389 | net.ipv4.conf.lo.accept_source_route=0 | |
|
|
390 | net.ipv4.conf.eth0.accept_redirects=0 | |
|
|
391 | net.ipv4.conf.eth0.send_redirects=0 | |
|
|
392 | net.ipv4.conf.eth0.accept_source_route=0 | |
|
|
393 | net.ipv4.icmp_echo_ignore_broadcasts=1 | |
|
|
394 | net.ipv4.icmp_ignore_bogus_error_responses=1 | |
|
|
395 | ||
|
|
396 | net.ipv6.conf.all.accept_redirects=0 | |
|
|
397 | net.ipv6.conf.all.accept_source_route=0 | |
|
|
398 | net.ipv6.conf.all.router_solicitations=0 | |
|
|
399 | net.ipv6.conf.all.accept_ra_rtr_pref=0 | |
|
|
400 | net.ipv6.conf.all.accept_ra_pinfo=0 | |
|
|
401 | net.ipv6.conf.all.accept_ra_defrtr=0 | |
|
|
402 | net.ipv6.conf.all.autoconf=0 | |
|
|
403 | net.ipv6.conf.all.dad_transmits=0 | |
|
|
404 | net.ipv6.conf.all.max_addresses=1 | |
|
|
405 | ||
|
|
406 | net.ipv6.conf.default.accept_redirects=0 | |
|
|
407 | net.ipv6.conf.default.accept_source_route=0 | |
|
|
408 | net.ipv6.conf.default.router_solicitations=0 | |
|
|
409 | net.ipv6.conf.default.accept_ra_rtr_pref=0 | |
|
|
410 | net.ipv6.conf.default.accept_ra_pinfo=0 | |
|
|
411 | net.ipv6.conf.default.accept_ra_defrtr=0 | |
|
|
412 | net.ipv6.conf.default.autoconf=0 | |
|
|
413 | net.ipv6.conf.default.dad_transmits=0 | |
|
|
414 | net.ipv6.conf.default.max_addresses=1 | |
|
|
415 | ||
|
|
416 | net.ipv6.conf.lo.accept_redirects=0 | |
|
|
417 | net.ipv6.conf.lo.accept_source_route=0 | |
|
|
418 | net.ipv6.conf.lo.router_solicitations=0 | |
|
|
419 | net.ipv6.conf.lo.accept_ra_rtr_pref=0 | |
|
|
420 | net.ipv6.conf.lo.accept_ra_pinfo=0 | |
|
|
421 | net.ipv6.conf.lo.accept_ra_defrtr=0 | |
|
|
422 | net.ipv6.conf.lo.autoconf=0 | |
|
|
423 | net.ipv6.conf.lo.dad_transmits=0 | |
|
|
424 | net.ipv6.conf.lo.max_addresses=1 | |
|
|
425 | ||
|
|
426 | net.ipv6.conf.eth0.accept_redirects=0 | |
|
|
427 | net.ipv6.conf.eth0.accept_source_route=0 | |
|
|
428 | net.ipv6.conf.eth0.router_solicitations=0 | |
|
|
429 | net.ipv6.conf.eth0.accept_ra_rtr_pref=0 | |
|
|
430 | net.ipv6.conf.eth0.accept_ra_pinfo=0 | |
|
|
431 | net.ipv6.conf.eth0.accept_ra_defrtr=0 | |
|
|
432 | net.ipv6.conf.eth0.autoconf=0 | |
|
|
433 | net.ipv6.conf.eth0.dad_transmits=0 | |
|
|
434 | net.ipv6.conf.eth0.max_addresses=1 | |
|
|
435 | EOM | |
|
|
436 | ||
|
|
437 | # Enable resolver warnings about spoofed addresses | |
|
|
438 | cat <<EOM >>$R/etc/host.conf | |
|
|
439 | spoof warn | |
|
|
440 | EOM | |
|
|
441 | fi | |
|
|
442 | ||
|
|
443 | # Regenerate openssh server host keys | |
|
|
444 | if [ "$ENABLE_SSHD" = true ] ; then | |
|
|
445 | rm -fr $R/etc/ssh/ssh_host_* | |
|
|
446 | LANG=C chroot $R dpkg-reconfigure openssh-server | |
|
|
447 | fi | |
|
|
448 | ||
|
|
449 | # Enable serial console systemd style | |
|
|
450 | if [ "$ENABLE_CONSOLE" = true ] ; then | |
|
|
451 | LANG=C chroot $R systemctl enable serial-getty\@ttyAMA0.service | |
|
|
452 | fi | |
|
|
453 | ||
|
|
454 | # Enable firewall based on iptables started by systemd service | |
|
|
455 | if [ "$ENABLE_IPTABLES" = true ] ; then | |
|
|
456 | # Create iptables configuration directory | |
|
|
457 | mkdir -p "$R/etc/iptables" | |
|
|
458 | ||
|
|
459 | # Create iptables systemd service | |
|
|
460 | cat <<EOM >$R/etc/systemd/system/iptables.service | |
|
|
461 | [Unit] | |
|
|
462 | Description=Packet Filtering Framework | |
|
|
463 | DefaultDependencies=no | |
|
|
464 | After=systemd-sysctl.service | |
|
|
465 | Before=sysinit.target | |
|
|
466 | [Service] | |
|
|
467 | Type=oneshot | |
|
|
468 | ExecStart=/sbin/iptables-restore /etc/iptables/iptables.rules | |
|
|
469 | ExecReload=/sbin/iptables-restore /etc/iptables/iptables.rules | |
|
|
470 | ExecStop=/etc/iptables/flush-iptables.sh | |
|
|
471 | RemainAfterExit=yes | |
|
|
472 | [Install] | |
|
|
473 | WantedBy=multi-user.target | |
|
|
474 | EOM | |
|
|
475 | ||
|
|
476 | # Create flush-table script called by iptables service | |
|
|
477 | cat <<EOM >$R/etc/iptables/flush-iptables.sh | |
|
|
478 | #!/bin/sh | |
|
|
479 | iptables -F | |
|
|
480 | iptables -X | |
|
|
481 | iptables -t nat -F | |
|
|
482 | iptables -t nat -X | |
|
|
483 | iptables -t mangle -F | |
|
|
484 | iptables -t mangle -X | |
|
|
485 | iptables -P INPUT ACCEPT | |
|
|
486 | iptables -P FORWARD ACCEPT | |
|
|
487 | iptables -P OUTPUT ACCEPT | |
|
|
488 | EOM | |
|
|
489 | ||
|
|
490 | # Create iptables rule file | |
|
|
491 | cat <<EOM >$R/etc/iptables/iptables.rules | |
|
|
492 | *filter | |
|
|
493 | :INPUT DROP [0:0] | |
|
|
494 | :FORWARD DROP [0:0] | |
|
|
495 | :OUTPUT ACCEPT [0:0] | |
|
|
496 | :TCP - [0:0] | |
|
|
497 | :UDP - [0:0] | |
|
|
498 | :SSH - [0:0] | |
|
|
499 | ||
|
|
500 | # Rate limit ping requests | |
|
|
501 | -A INPUT -p icmp --icmp-type echo-request -m limit --limit 30/min --limit-burst 8 -j ACCEPT | |
|
|
502 | -A INPUT -p icmp --icmp-type echo-request -j DROP | |
|
|
503 | ||
|
|
504 | # Accept established connections | |
|
|
505 | -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT | |
|
|
506 | ||
|
|
507 | # Accept all traffic on loopback interface | |
|
|
508 | -A INPUT -i lo -j ACCEPT | |
|
|
509 | ||
|
|
510 | # Drop packets declared invalid | |
|
|
511 | -A INPUT -m conntrack --ctstate INVALID -j DROP | |
|
|
512 | ||
|
|
513 | # SSH rate limiting | |
|
|
514 | -A INPUT -p tcp --dport ssh -m conntrack --ctstate NEW -j SSH | |
|
|
515 | -A SSH -m recent --name sshbf --rttl --rcheck --hitcount 3 --seconds 10 -j DROP | |
|
|
516 | -A SSH -m recent --name sshbf --rttl --rcheck --hitcount 20 --seconds 1800 -j DROP | |
|
|
517 | -A SSH -m recent --name sshbf --set -j ACCEPT | |
|
|
518 | ||
|
|
519 | # Send TCP and UDP connections to their respective rules chain | |
|
|
520 | -A INPUT -p udp -m conntrack --ctstate NEW -j UDP | |
|
|
521 | -A INPUT -p tcp --syn -m conntrack --ctstate NEW -j TCP | |
|
|
522 | ||
|
|
523 | # Reject dropped packets with a RFC compliant responce | |
|
|
524 | -A INPUT -p udp -j REJECT --reject-with icmp-port-unreachable | |
|
|
525 | -A INPUT -p tcp -j REJECT --reject-with tcp-rst | |
|
|
526 | -A INPUT -j REJECT --reject-with icmp-proto-unreachable | |
|
|
527 | ||
|
|
528 | ## TCP PORT RULES | |
|
|
529 | # -A TCP -p tcp -j LOG | |
|
|
530 | ||
|
|
531 | ## UDP PORT RULES | |
|
|
532 | # -A UDP -p udp -j LOG | |
|
|
533 | ||
|
|
534 | COMMIT | |
|
|
535 | EOM | |
|
|
536 | ||
|
|
537 | # Reload systemd configuration and enable iptables service | |
|
|
538 | LANG=C chroot $R systemctl daemon-reload | |
|
|
539 | LANG=C chroot $R systemctl enable iptables.service | |
|
|
540 | ||
|
|
541 | if [ "$ENABLE_IPV6" = true ] ; then | |
|
|
542 | # Create ip6tables systemd service | |
|
|
543 | cat <<EOM >$R/etc/systemd/system/ip6tables.service | |
|
|
544 | [Unit] | |
|
|
545 | Description=Packet Filtering Framework | |
|
|
546 | DefaultDependencies=no | |
|
|
547 | After=systemd-sysctl.service | |
|
|
548 | Before=sysinit.target | |
|
|
549 | [Service] | |
|
|
550 | Type=oneshot | |
|
|
551 | ExecStart=/sbin/ip6tables-restore /etc/iptables/ip6tables.rules | |
|
|
552 | ExecReload=/sbin/ip6tables-restore /etc/iptables/ip6tables.rules | |
|
|
553 | ExecStop=/etc/iptables/flush-ip6tables.sh | |
|
|
554 | RemainAfterExit=yes | |
|
|
555 | [Install] | |
|
|
556 | WantedBy=multi-user.target | |
|
|
557 | EOM | |
|
|
558 | ||
|
|
559 | # Create ip6tables file | |
|
|
560 | cat <<EOM >$R/etc/iptables/flush-ip6tables.sh | |
|
|
561 | #!/bin/sh | |
|
|
562 | ip6tables -F | |
|
|
563 | ip6tables -X | |
|
|
564 | ip6tables -Z | |
|
|
565 | for table in $(</proc/net/ip6_tables_names) | |
|
|
566 | do | |
|
|
567 | ip6tables -t \$table -F | |
|
|
568 | ip6tables -t \$table -X | |
|
|
569 | ip6tables -t \$table -Z | |
|
|
570 | done | |
|
|
571 | ip6tables -P INPUT ACCEPT | |
|
|
572 | ip6tables -P OUTPUT ACCEPT | |
|
|
573 | ip6tables -P FORWARD ACCEPT | |
|
|
574 | EOM | |
|
|
575 | ||
|
|
576 | # Create ip6tables rule file | |
|
|
577 | cat <<EOM >$R/etc/iptables/ip6tables.rules | |
|
|
578 | *filter | |
|
|
579 | :INPUT DROP [0:0] | |
|
|
580 | :FORWARD DROP [0:0] | |
|
|
581 | :OUTPUT ACCEPT [0:0] | |
|
|
582 | :TCP - [0:0] | |
|
|
583 | :UDP - [0:0] | |
|
|
584 | :SSH - [0:0] | |
|
|
585 | ||
|
|
586 | # Drop packets with RH0 headers | |
|
|
587 | -A INPUT -m rt --rt-type 0 -j DROP | |
|
|
588 | -A OUTPUT -m rt --rt-type 0 -j DROP | |
|
|
589 | -A FORWARD -m rt --rt-type 0 -j DROP | |
|
|
590 | ||
|
|
591 | # Rate limit ping requests | |
|
|
592 | -A INPUT -p icmpv6 --icmpv6-type echo-request -m limit --limit 30/min --limit-burst 8 -j ACCEPT | |
|
|
593 | -A INPUT -p icmpv6 --icmpv6-type echo-request -j DROP | |
|
|
594 | ||
|
|
595 | # Accept established connections | |
|
|
596 | -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT | |
|
|
597 | ||
|
|
598 | # Accept all traffic on loopback interface | |
|
|
599 | -A INPUT -i lo -j ACCEPT | |
|
|
600 | ||
|
|
601 | # Drop packets declared invalid | |
|
|
602 | -A INPUT -m conntrack --ctstate INVALID -j DROP | |
|
|
603 | ||
|
|
604 | # SSH rate limiting | |
|
|
605 | -A INPUT -p tcp --dport ssh -m conntrack --ctstate NEW -j SSH | |
|
|
606 | -A SSH -m recent --name sshbf --rttl --rcheck --hitcount 3 --seconds 10 -j DROP | |
|
|
607 | -A SSH -m recent --name sshbf --rttl --rcheck --hitcount 20 --seconds 1800 -j DROP | |
|
|
608 | -A SSH -m recent --name sshbf --set -j ACCEPT | |
|
|
609 | ||
|
|
610 | # Send TCP and UDP connections to their respective rules chain | |
|
|
611 | -A INPUT -p udp -m conntrack --ctstate NEW -j UDP | |
|
|
612 | -A INPUT -p tcp --syn -m conntrack --ctstate NEW -j TCP | |
|
|
613 | ||
|
|
614 | # Reject dropped packets with a RFC compliant responce | |
|
|
615 | -A INPUT -p udp -j REJECT --reject-with icmp6-adm-prohibited | |
|
|
616 | -A INPUT -p tcp -j REJECT --reject-with icmp6-adm-prohibited | |
|
|
617 | -A INPUT -j REJECT --reject-with icmp6-adm-prohibited | |
|
|
618 | ||
|
|
619 | ## TCP PORT RULES | |
|
|
620 | # -A TCP -p tcp -j LOG | |
|
|
621 | ||
|
|
622 | ## UDP PORT RULES | |
|
|
623 | # -A UDP -p udp -j LOG | |
|
|
624 | ||
|
|
625 | COMMIT | |
|
|
626 | EOM | |
|
|
627 | ||
|
|
628 | # Reload systemd configuration and enable iptables service | |
|
|
629 | LANG=C chroot $R systemctl daemon-reload | |
|
|
630 | LANG=C chroot $R systemctl enable ip6tables.service | |
|
|
631 | ||
|
|
632 | fi | |
|
|
633 | fi | |
|
|
634 | ||
|
|
635 | # Unmount mounted filesystems | |
|
|
636 | umount -l $R/proc | |
|
|
637 | umount -l $R/sys | |
|
|
638 | ||
|
|
639 | # Clean up files | |
|
|
640 | rm -f $R/etc/apt/sources.list.save | |
|
|
641 | rm -f $R/etc/resolvconf/resolv.conf.d/original | |
|
|
642 | rm -rf $R/run | |
|
|
643 | mkdir -p $R/run | |
|
|
644 | rm -f $R/etc/*- | |
|
|
645 | rm -f $R/root/.bash_history | |
|
|
646 | rm -rf $R/tmp/* | |
|
|
647 | rm -f $R/var/lib/urandom/random-seed | |
|
|
648 | [ -L $R/var/lib/dbus/machine-id ] || rm -f $R/var/lib/dbus/machine-id | |
|
|
649 | rm -f $R/etc/machine-id | |
|
|
650 | ||
|
|
651 | # Calculate size of the chroot directory | |
|
|
652 | CHROOT_SIZE=$(expr `du -s $R | awk '{ print $1 }'` / 1024) | |
|
|
653 | ||
|
|
654 | # Calculate required image size | |
|
|
655 | IMAGE_SIZE=`expr $(expr ${CHROOT_SIZE} / 1024 + 1) \* 1024` | |
|
|
656 | ||
|
|
657 | # Calculate number of sectors for the partition | |
|
|
658 | IMAGE_SECTORS=`expr $(expr ${IMAGE_SIZE} \* 1048576) / 512 - 133120` | |
|
|
659 | ||
|
|
660 | # Prepare date string for image file name | |
|
|
661 | DATE="$(date +%Y-%m-%d)" | |
|
|
662 | ||
|
|
663 | # Prepare image file | |
|
|
664 | dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=1M count=1 | |
|
|
665 | dd if=/dev/zero of="$BASEDIR/${DATE}-debian-${RELEASE}.img" bs=1M count=0 seek=${IMAGE_SIZE} | |
|
|
666 | ||
|
|
667 | # Write partition table | |
|
|
668 | sfdisk -q -L -f "$BASEDIR/${DATE}-debian-${RELEASE}.img" <<EOM | |
|
|
669 | unit: sectors | |
|
|
670 | ||
|
|
671 | 1 : start= 2048, size= 131072, Id= c, bootable | |
|
|
672 | 2 : start= 133120, size= ${IMAGE_SECTORS}, Id=83 | |
|
|
673 | 3 : start= 0, size= 0, Id= 0 | |
|
|
674 | 4 : start= 0, size= 0, Id= 0 | |
|
|
675 | EOM | |
|
|
676 | ||
|
|
677 | # Set up temporary loop devices and build filesystems | |
|
|
678 | VFAT_LOOP="$(losetup -o 1M --sizelimit 64M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)" | |
|
|
679 | EXT4_LOOP="$(losetup -o 65M --sizelimit `expr ${IMAGE_SIZE} - 64`M -f --show $BASEDIR/${DATE}-debian-${RELEASE}.img)" | |
|
|
680 | mkfs.vfat "$VFAT_LOOP" | |
|
|
681 | mkfs.ext4 "$EXT4_LOOP" | |
|
|
682 | ||
|
|
683 | # Mount the temporary loop devices | |
|
|
684 | mkdir -p "$BUILDDIR/mount" | |
|
|
685 | mount "$EXT4_LOOP" "$BUILDDIR/mount" | |
|
|
686 | ||
|
|
687 | mkdir -p "$BUILDDIR/mount/boot/firmware" | |
|
|
688 | mount "$VFAT_LOOP" "$BUILDDIR/mount/boot/firmware" | |
|
|
689 | ||
|
|
690 | # Copy all files from the chroot to the loop device mount point directory | |
|
|
691 | rsync -a "$R/" "$BUILDDIR/mount/" | |
|
|
692 | ||
|
|
693 | # Unmount all temporary loop devices and mount points | |
|
|
694 | cleanup | |
|
|
695 | ||
|
|
696 | # (optinal) create block map file for "bmaptool" | |
|
|
697 | bmaptool create -o "$BASEDIR/${DATE}-debian-${RELEASE}.bmap" "$BASEDIR/${DATE}-debian-${RELEASE}.img" | |
|
|
698 | ||
|
|
699 | # Image was successfully created | |
|
|
700 | echo "$BASEDIR/${DATE}-debian-${RELEASE}.img (${IMAGE_SIZE})" ": successfully created" | |
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