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#
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# Setup fstab and initramfs
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#
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# Load utility functions
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. ./functions.sh
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# Install and setup fstab
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install_readonly files/mount/fstab "${ETC_DIR}/fstab"
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if [ "$ENABLE_UBOOTUSB" = true ] ; then
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sed -i "s/mmcblk0p1/sda1/" "${ETC_DIR}/fstab"
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sed -i "s/mmcblk0p2/sda2/" "${ETC_DIR}/fstab"
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fi
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# Add usb/sda disk root partition to fstab
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if [ "$ENABLE_SPLITFS" = true ] && [ "$ENABLE_CRYPTFS" = false ] ; then
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sed -i "s/mmcblk0p2/sda1/" "${ETC_DIR}/fstab"
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fi
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# Add encrypted root partition to fstab and crypttab
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if [ "$ENABLE_CRYPTFS" = true ] ; then
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# Replace fstab root partition with encrypted partition mapping
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sed -i "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING}/" "${ETC_DIR}/fstab"
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# Add encrypted partition to crypttab and fstab
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install_readonly files/mount/crypttab "${ETC_DIR}/crypttab"
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echo "${CRYPTFS_MAPPING} /dev/mmcblk0p2 none luks,initramfs" >> "${ETC_DIR}/crypttab"
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if [ "$ENABLE_SPLITFS" = true ] ; then
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# Add usb/sda disk to crypttab
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sed -i "s/mmcblk0p2/sda1/" "${ETC_DIR}/crypttab"
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fi
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fi
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# Generate initramfs file
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if [ "$ENABLE_INITRAMFS" = true ] ; then
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if [ "$ENABLE_CRYPTFS" = true ] ; then
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# Include initramfs scripts to auto expand encrypted root partition
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if [ "$EXPANDROOT" = true ] ; then
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install_exec files/initramfs/expand_encrypted_rootfs "${ETC_DIR}/initramfs-tools/scripts/init-premount/expand_encrypted_rootfs"
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install_exec files/initramfs/expand-premount "${ETC_DIR}/initramfs-tools/scripts/local-premount/expand-premount"
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install_exec files/initramfs/expand-tools "${ETC_DIR}/initramfs-tools/hooks/expand-tools"
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fi
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if [ "$CRYPTFS_DROPBEAR" = true ]; then
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if [ -n "$CRYPTFS_DROPBEAR_PUBKEY" ] && [ -f "$CRYPTFS_DROPBEAR_PUBKEY" ] ; then
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install_readonly "${CRYPTFS_DROPBEAR_PUBKEY}" "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub
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cat "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub >> "${ETC_DIR}"/dropbear-initramfs/authorized_keys
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else
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# Create key
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chroot_exec /usr/bin/dropbearkey -t rsa -f /etc/dropbear-initramfs/id_rsa.dropbear
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# Convert dropbear key to openssh key
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chroot_exec /usr/lib/dropbear/dropbearconvert dropbear openssh /etc/dropbear-initramfs/id_rsa.dropbear /etc/dropbear-initramfs/id_rsa
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# Get Public Key Part
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chroot_exec /usr/bin/dropbearkey -y -f /etc/dropbear-initramfs/id_rsa.dropbear | chroot_exec tee /etc/dropbear-initramfs/id_rsa.pub
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# Delete unwanted lines
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sed -i '/Public/d' "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub
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sed -i '/Fingerprint/d' "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub
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# Trust the new key
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cat "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub > "${ETC_DIR}"/dropbear-initramfs/authorized_keys
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# Save Keys - convert with putty from rsa/openssh to puttkey
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cp -f "${ETC_DIR}"/dropbear-initramfs/id_rsa "${BASEDIR}"/dropbear_initramfs_key.rsa
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# Get unlock script
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install_exec files/initramfs/crypt_unlock.sh "${ETC_DIR}"/initramfs-tools/hooks/crypt_unlock.sh
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# Enable Dropbear inside initramfs
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printf "#\n# DROPBEAR: [ y | n ]\n#\n\nDROPBEAR=y\n" >> "${ETC_DIR}/initramfs-tools/initramfs.conf"
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# Enable Dropbear inside initramfs
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sed -i "54 i sleep 5" "${R}"/usr/share/initramfs-tools/scripts/init-premount/dropbear
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fi
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else
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# Disable SSHD inside initramfs
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printf "#\n# DROPBEAR: [ y | n ]\n#\n\nDROPBEAR=n\n" >> "${ETC_DIR}/initramfs-tools/initramfs.conf"
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fi
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# Add cryptsetup modules to initramfs
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printf "#\n# CRYPTSETUP: [ y | n ]\n#\n\nCRYPTSETUP=y\n" >> "${ETC_DIR}/initramfs-tools/conf-hook"
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# Dummy mapping required by mkinitramfs
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echo "0 1 crypt $(echo "${CRYPTFS_CIPHER}" | cut -d ':' -f 1) ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0 7:0 4096" | chroot_exec dmsetup create "${CRYPTFS_MAPPING}"
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# Generate initramfs with encrypted root partition support
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chroot_exec mkinitramfs -o "/boot/firmware/initramfs-${KERNEL_VERSION}" "${KERNEL_VERSION}"
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# Remove dummy mapping
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chroot_exec cryptsetup close "${CRYPTFS_MAPPING}"
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else
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# Generate initramfs without encrypted root partition support
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chroot_exec mkinitramfs -o "/boot/firmware/initramfs-${KERNEL_VERSION}" "${KERNEL_VERSION}"
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fi
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fi
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