From b33dfc51ccafb9172c0a29c0e4376f0db8b9e3f1 Mon Sep 17 00:00:00 2001
From: Jan Wagner <mail@jwagner.eu>
Date: Fri, 25 Mar 2016 21:58:11 +0100
Subject: Added: ENABLE_CRYPTFS - encrypted rootfs, use-latest-bootloader,
 cp-cleanup

---
 bootstrap.d/10-bootstrap.sh |  4 +--
 bootstrap.d/11-apt.sh       | 27 +++++++++++------
 bootstrap.d/13-kernel.sh    | 74 ++++++++++++++++++++++++++++++++++++++-------
 bootstrap.d/41-uboot.sh     |  2 +-
 bootstrap.d/50-firstboot.sh |  3 +-
 bootstrap.d/99-reduce.sh    |  6 ++++
 6 files changed, 90 insertions(+), 26 deletions(-)

(limited to 'bootstrap.d')

diff --git a/bootstrap.d/10-bootstrap.sh b/bootstrap.d/10-bootstrap.sh
index 7b4a04d..f55c3e3 100644
--- a/bootstrap.d/10-bootstrap.sh
+++ b/bootstrap.d/10-bootstrap.sh
@@ -13,11 +13,11 @@ else
 fi
 
 # Copy qemu emulator binary to chroot
-cp "${QEMU_BINARY}" "$R/usr/bin"
+install_exec "${QEMU_BINARY}" "${R}${QEMU_BINARY}"
 
 # Copy debian-archive-keyring.pgp
 mkdir -p "$R/usr/share/keyrings"
-cp /usr/share/keyrings/debian-archive-keyring.gpg "$R/usr/share/keyrings/debian-archive-keyring.gpg"
+install_readonly /usr/share/keyrings/debian-archive-keyring.gpg "$R/usr/share/keyrings/debian-archive-keyring.gpg"
 
 # Complete the bootstrapping process
 chroot_exec /debootstrap/debootstrap --second-stage
diff --git a/bootstrap.d/11-apt.sh b/bootstrap.d/11-apt.sh
index 9610832..554aaf5 100644
--- a/bootstrap.d/11-apt.sh
+++ b/bootstrap.d/11-apt.sh
@@ -11,18 +11,25 @@ if [ -z "$APT_PROXY" ] ; then
   sed -i "s/\"\"/\"${APT_PROXY}\"/" "$R/etc/apt/apt.conf.d/10proxy"
 fi
 
-# Install APT pinning configuration for flash-kernel package
-install_readonly files/apt/flash-kernel "$R/etc/apt/preferences.d/flash-kernel"
+if [ "$BUILD_KERNEL" = false ] ; then
+  # Install APT pinning configuration for flash-kernel package
+  install_readonly files/apt/flash-kernel "$R/etc/apt/preferences.d/flash-kernel"
 
-# Upgrade collabora package index and install collabora keyring
-echo "deb https://repositories.collabora.co.uk/debian ${RELEASE} rpi2" > "$R/etc/apt/sources.list"
-chroot_exec apt-get -qq -y update
-chroot_exec apt-get -qq -y --force-yes install collabora-obs-archive-keyring
+  # Install APT sources.list
+  install_readonly files/apt/sources.list "$R/etc/apt/sources.list"
+  echo "deb https://repositories.collabora.co.uk/debian ${RELEASE} rpi2" >> "$R/etc/apt/sources.list"
+
+  # Upgrade collabora package index and install collabora keyring
+  chroot_exec apt-get -qq -y update
+  chroot_exec apt-get -qq -y --force-yes install collabora-obs-archive-keyring
+else # BUILD_KERNEL=true
+  # Install APT sources.list
+  install_readonly files/apt/sources.list "$R/etc/apt/sources.list"
 
-# Install APT sources.list
-install_readonly files/apt/sources.list "$R/etc/apt/sources.list"
-sed -i "s/\/ftp.debian.org\//\/${APT_SERVER}\//" "$R/etc/apt/sources.list"
-sed -i "s/ jessie/ ${RELEASE}/" "$R/etc/apt/sources.list"
+  # Use specified APT server and release
+  sed -i "s/\/ftp.debian.org\//\/${APT_SERVER}\//" "$R/etc/apt/sources.list"
+  sed -i "s/ jessie/ ${RELEASE}/" "$R/etc/apt/sources.list"
+fi
 
 # Upgrade package index and update all installed packages and changed dependencies
 chroot_exec apt-get -qq -y update
diff --git a/bootstrap.d/13-kernel.sh b/bootstrap.d/13-kernel.sh
index 671025d..ec6b59f 100644
--- a/bootstrap.d/13-kernel.sh
+++ b/bootstrap.d/13-kernel.sh
@@ -110,24 +110,31 @@ if [ "$BUILD_KERNEL" = true ] ; then
   KERNEL_VERSION=`cat "$R/usr/src/linux/include/config/kernel.release"`
 
   # Copy kernel configuration file to the boot directory
-  cp "$R/usr/src/linux/.config" "$R/boot/config-${KERNEL_VERSION}"
+  install_readonly "$R/usr/src/linux/.config" "$R/boot/config-${KERNEL_VERSION}"
 
   # Copy dts and dtb device tree sources and binaries
   mkdir "$R/boot/firmware/overlays/"
-  cp "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/"*.dtb "$R/boot/firmware/"
-  cp "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/"*.dtb* "$R/boot/firmware/overlays/"
-  cp "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/README" "$R/boot/firmware/overlays/"
+  install_readonly "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/"*.dtb "$R/boot/firmware/"
+  install_readonly "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/"*.dtb* "$R/boot/firmware/overlays/"
+  install_readonly "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/dts/overlays/README" "$R/boot/firmware/overlays/README"
 
-  # Convert kernel zImage and copy it to the boot directory
-  "$R/usr/src/linux/scripts/mkknlimg" "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/zImage" "$R/boot/firmware/kernel7.img"
+  # Copy zImage kernel to the boot directory
+  install_readonly "$R/usr/src/linux/arch/${KERNEL_ARCH}/boot/zImage" "$R/boot/firmware/kernel7.img"
 
   # Remove kernel sources
   if [ "$KERNEL_REMOVESRC" = true ] ; then
     rm -fr "$R/usr/src/linux"
   fi
 
-  # Install raspberry bootloader and flash-kernel packages
-  chroot_exec apt-get -qq -y --no-install-recommends install raspberrypi-bootloader-nokernel
+  # Install latest boot binaries from raspberry/firmware github
+  wget -q -O "$R/boot/firmware/bootcode.bin" https://github.com/raspberrypi/firmware/raw/master/boot/bootcode.bin
+  wget -q -O "$R/boot/firmware/fixup_cd.dat" https://github.com/raspberrypi/firmware/raw/master/boot/fixup_cd.dat
+  wget -q -O "$R/boot/firmware/fixup.dat" https://github.com/raspberrypi/firmware/raw/master/boot/fixup.dat
+  wget -q -O "$R/boot/firmware/fixup_x.dat" https://github.com/raspberrypi/firmware/raw/master/boot/fixup_x.dat
+  wget -q -O "$R/boot/firmware/start_cd.elf" https://github.com/raspberrypi/firmware/raw/master/boot/start_cd.elf
+  wget -q -O "$R/boot/firmware/start.elf" https://github.com/raspberrypi/firmware/raw/master/boot/start.elf
+  wget -q -O "$R/boot/firmware/start_x.elf" https://github.com/raspberrypi/firmware/raw/master/boot/start_x.elf
+
 else # BUILD_KERNEL=false
   # Kernel installation
   chroot_exec apt-get -qq -y --no-install-recommends install linux-image-"${COLLABORA_KERNEL}" raspberrypi-bootloader-nokernel
@@ -135,9 +142,15 @@ else # BUILD_KERNEL=false
   # Install flash-kernel last so it doesn't try (and fail) to detect the platform in the chroot
   chroot_exec apt-get -qq -y install flash-kernel
 
+  # Check if kernel installation was successful
   VMLINUZ="$(ls -1 $R/boot/vmlinuz-* | sort | tail -n 1)"
-  [ -z "$VMLINUZ" ] && exit 1
-  cp "$VMLINUZ" "$R/boot/firmware/kernel7.img"
+  if [ -z "$VMLINUZ" ] ; then
+    echo "error: kernel installation failed! (/boot/vmlinuz-* not found)"
+    cleanup
+    exit 1
+  fi
+  # Copy vmlinuz kernel to the boot directory
+  install_readonly "$VMLINUZ" "$R/boot/firmware/kernel7.img"
 fi
 
 # Setup firmware boot cmdline
@@ -160,6 +173,11 @@ fi
 # Install firmware boot cmdline
 echo "${CMDLINE}" > "$R/boot/firmware/cmdline.txt"
 
+# Add encrypted root partition to cmdline.txt
+if [ "$ENABLE_CRYPTFS" = true ] ; then
+    sed -i "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING} cryptdevice=\/dev\/mmcblk0p2:${CRYPTFS_MAPPING}/" "$R/boot/firmware/cmdline.txt"
+fi
+
 # Install firmware config
 install_readonly files/boot/config.txt "$R/boot/firmware/config.txt"
 
@@ -168,6 +186,11 @@ if [ "$ENABLE_MINGPU" = true ] ; then
   echo "gpu_mem=16" >> "$R/boot/firmware/config.txt"
 fi
 
+# Setup boot with initramfs
+if [ "$ENABLE_INITRAMFS" = true ] ; then
+  echo "initramfs initramfs-${KERNEL_VERSION} followkernel" >> "$R/boot/firmware/config.txt"
+fi
+
 # Create firmware configuration and cmdline symlinks
 ln -sf firmware/config.txt "$R/boot/config.txt"
 ln -sf firmware/cmdline.txt "$R/boot/cmdline.txt"
@@ -192,8 +215,37 @@ install_readonly files/modules/raspi-blacklist.conf "$R/etc/modprobe.d/raspi-bla
 
 # Install and setup fstab
 install_readonly files/mount/fstab "$R/etc/fstab"
+
+# Add usb/sda disk root partition to fstab
 if [ "$ENABLE_SPLITFS" = true ] ; then
-  sed -i 's/mmcblk0p2/sda1/' "$R/etc/fstab"
+  sed -i "s/mmcblk0p2/sda1/" "$R/etc/fstab"
+fi
+
+# Add encrypted root partition to fstab and crypttab
+if [ "$ENABLE_CRYPTFS" = true ] ; then
+  # Replace fstab root partition with encrypted partition mapping
+  sed -i "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING}/" "$R/etc/fstab"
+
+  # Add encrypted partition to crypttab and fstab
+  install_readonly files/mount/crypttab "$R/etc/crypttab"
+  echo "${CRYPTFS_MAPPING} /dev/mmcblk0p2 none luks" >> "$R/etc/crypttab"
+fi
+
+# Generate initramfs file
+if [ "$ENABLE_INITRAMFS" = true ] ; then
+  if [ "$ENABLE_CRYPTFS" = true ] ; then
+    # Dummy mapping required by mkinitramfs
+    echo "0 1 crypt $(echo ${CRYPTFS_CIPHER} | cut -d ':' -f 1) ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0 7:0 4096" | chroot_exec dmsetup create "${CRYPTFS_MAPPING}"
+
+    # Generate initramfs with encrypted root partition support
+    chroot_exec mkinitramfs -o "/boot/firmware/initramfs-${KERNEL_VERSION}" "${KERNEL_VERSION}"
+
+    # Remove dummy mapping
+    chroot_exec cryptsetup close "${CRYPTFS_MAPPING}"
+  else
+    # Generate initramfs without encrypted root partition support
+    chroot_exec mkinitramfs -o "/boot/firmware/initramfs-${KERNEL_VERSION}" "${KERNEL_VERSION}"
+  fi
 fi
 
 # Install sysctl.d configuration files
diff --git a/bootstrap.d/41-uboot.sh b/bootstrap.d/41-uboot.sh
index d3f13b9..8f59f26 100644
--- a/bootstrap.d/41-uboot.sh
+++ b/bootstrap.d/41-uboot.sh
@@ -19,7 +19,7 @@ if [ "$ENABLE_UBOOT" = true ] ; then
   chroot_exec 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/"
+  install_readonly "$R/tmp/u-boot/u-boot.bin" "$R/boot/firmware/u-boot.bin"
   printf "\n# boot u-boot kernel\nkernel=u-boot.bin\n" >> "$R/boot/firmware/config.txt"
 
   # Install and setup U-Boot command file
diff --git a/bootstrap.d/50-firstboot.sh b/bootstrap.d/50-firstboot.sh
index 0c93d11..2ec9404 100644
--- a/bootstrap.d/50-firstboot.sh
+++ b/bootstrap.d/50-firstboot.sh
@@ -9,9 +9,8 @@
 cat files/firstboot/10-begin.sh > "$R/etc/rc.firstboot"
 
 # Ensure openssh server host keys are regenerated on first boot
-if [ "$ENABLE_SSHD" = true ] && [ "$ENABLE_REDUCE" = false ]; then
+if [ "$ENABLE_SSHD" = true ] ; then
   cat files/firstboot/21-generate-ssh-keys.sh >> "$R/etc/rc.firstboot"
-  rm -f "$R/etc/ssh/ssh_host_*"
 fi
 
 # Prepare filesystem auto expand
diff --git a/bootstrap.d/99-reduce.sh b/bootstrap.d/99-reduce.sh
index f3b2848..99fbc9b 100644
--- a/bootstrap.d/99-reduce.sh
+++ b/bootstrap.d/99-reduce.sh
@@ -66,6 +66,12 @@ if [ "$ENABLE_REDUCE" = true ] ; then
     rm -f "$R/boot/firmware/fixup_x.dat"
   fi
 
+  # Remove kernel and initrd from /boot (already in /boot/firmware)
+  if [ "$BUILD_KERNEL" = false ] ; then
+    rm -r "$R/boot/vmlinuz--*"
+    rm -r "$R/boot/initrd.img-*"
+  fi
+
   # Clean APT list of repositories
   rm -fr "$R/var/lib/apt/lists/*"
   chroot_exec apt-get -qq -y update
-- 
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