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New Luks generation draft

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This commit is contained in:
Kevin Veen-Birkenbach 2020-10-01 17:42:35 +02:00
parent 3a250de79e
commit ed2083943a
2 changed files with 64 additions and 87 deletions
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8
scripts/image/base.sh
View File

@ -22,10 +22,10 @@ echo_partition_name(){
}
set_partition_paths(){
info "Setting partition paths..."
info "Setting partition and mapper paths..."
boot_partition_path=$(echo_partition_name "1")
root_partition_path=$(echo_partition_name "2")
encrypted_partition_path=$(echo_partition_name "3")
root_mapper_path=$root_partition_path
}
make_mount_folders(){
@ -47,13 +47,15 @@ make_working_folder(){
mount_partitions(){
info "Mount boot and root partition..." &&
mount -v "$boot_partition_path" "$boot_mount_path" &&
mount -v "$root_partition_path" "$root_mount_path" &&
mount -v "$root_mapper_path" "$root_mount_path" &&
info "The following mounts refering this setup exist:" && mount | grep "$working_folder_path" ||
error
}
destructor(){
info "Cleaning up..."
info "Encrypt decrypted root..."
sudo cryptsetup -v luksClose root | warning "Failed."
info "Unmounting everything..."
umount -lv "$chroot_dev_pts_mount_path" || warning "Umounting $chroot_dev_pts_mount_path failed!"
umount -lv "$chroot_dev_mount_path" || warning "Umounting $chroot_dev_mount_path failed!"

111
scripts/image/setup.sh
View File

@ -218,32 +218,7 @@ if [ "$transfer_image" = "y" ]
if [ "$os" = "arch" ]
then
info "Deleting partition tables..." &&
wipefs -a "$device_path" || error
if [ "$encrypt_system" == "y" ]
then
info "Creating partitions for encrypted system..." &&
( echo "o" #Type o. This will clear out any partitions on the drive.
echo "p" #Type p to list partitions. There should be no partitions left
echo "n" #Type n,
echo "p" #then p for primary,
echo "1" #1 for the first partition on the drive,
echo "" #press ENTER to accept the default first sector,
echo "+300M" #then type +100M for the last sector.
echo "t" #Type t,
echo "c" #then c to set the first partition to type W95 FAT32 (LBA).
echo "n" #Type n,
echo "p" #then p for primary,
echo "2" #2 for the second partition on the drive,
echo "" #Default start sector
echo "+3G" #Endsector
echo "n" #Type n,
echo "p" #then p for primary,
echo "3" #2 for the second partition on the drive,
echo "" #Default start sector
echo "" #Default end sector
echo "w" #Write the partition table and exit by typing w.
)| fdisk "$device_path" || error
else
wipefs -a "$device_path" &&
info "Creating partitions..." &&
( echo "o" #Type o. This will clear out any partitions on the drive.
echo "p" #Type p to list partitions. There should be no partitions left
@ -251,7 +226,7 @@ if [ "$transfer_image" = "y" ]
echo "p" #then p for primary,
echo "1" #1 for the first partition on the drive,
echo "" #Default start sector
echo "+100M" #then type +100M for the last sector.
echo "+300M" #then type +300M for the last sector.
echo "t" #Type t,
echo "c" #then c to set the first partition to type W95 FAT32 (LBA).
echo "n" #Type n,
@ -261,14 +236,48 @@ if [ "$transfer_image" = "y" ]
echo "" #Default end sector
echo "w" #Write the partition table and exit by typing w.
)| fdisk "$device_path" || error
fi
info "Format boot partition..." &&
mkfs.vfat "$boot_partition_path" || error
info "Format root partition..." &&
mkfs.ext4 "$root_partition_path" || error
if [ "$encrypt_system" == "y" ]
then
root_mapper_path="/dev/mapper/root"
question "Type in encryption password: " && read -r luks_password
question "Repeat encryption password:" && read -r luks_password_repeat
if [ "$luks_password" != "$luks_password_repeat" ]
then
error "Passwords didn't match."
fi
info "Formating $root_partition_path with LUKS..." &&
echo "$luks_password" | sudo cryptsetup -v luksFormat -c aes-xts-plain64 -s 512 -h sha512 --use-random -i 1000 "$root_partition_path" &&
info "Decrypting $root_partition_path..." &&
echo "$luks_password" | sudo cryptsetup -v luksOpen "$root_partition_path" root &&
info "Setting encryption variables..." &&
encrypted_partition_uuid=$(blkid "$root_partition_path" -s UUID -o value) &&
rescue_suffix=".$(date +%s).rescue" &&
mkinitcpio_path="/etc/mkinitcpio.conf" &&
mkinitcpio_rescue_path="$mkinitcpio_path$rescue_suffix" &&
mkinitcpio_search_modules="MODULES=()" &&
mkinitcpio_replace_modules="MODULES=(g_cdc usb_f_acm usb_f_ecm smsc95xx g_ether)" &&
mkinitcpio_search_binaries="BINARIES=()" &&
mkinitcpio_replace_binaries=$(echo "BINARIES=(/usr/lib/libgcc_s.so.1)"| sed -e 's/[\/&]/\\&/g') &&
mkinitcpio_search_hooks="HOOKS=(base udev autodetect modconf block filesystems keyboard fsck)" &&
mkinitcpio_replace_hooks="HOOKS=(base udev autodetect modconf block sleep netconf dropbear encryptssh filesystems keyboard fsck)" &&
fstab_path="/mnt/etc/fstab" &&
fstab_rescue_path="$fstab_path$rescue_suffix" &&
crypttab_path="/mnt/etc/crypttab" &&
crypttab_rescue_path="$crypttab_path$rescue_suffix" &&
boot_txt_path="/boot/boot.txt" &&
boot_txt_rescue_path="$boot_txt_path$rescue_suffix" &&
boot_txt_delete_line=$(echo "part uuid \${devtype} \${devnum}:2 uuid" | sed -e 's/[]\/$*.^[]/\\&/g') &&
boot_txt_setenv_origin=$(echo "setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=\${uuid} rw rootwait smsc95xx.macaddr=\"\${usbethaddr}\"" | sed -e 's/[]\/$*.^[]/\\&/g') &&
boot_txt_setenv_replace=$(echo "setenv bootargs console=ttyS1,115200 console=tty0 ip=::::$target_hostname:eth0:dhcp cryptdevice=UUID=$encrypted_partition_uuid:root root=$root_mapper_path rw rootwait smsc95xx.macaddr=\"\${usbethaddr}\""| sed -e 's/[\/&]/\\&/g') ||
error
fi
info "Format root partition..." &&
mkfs.ext4 "$root_mapper_path" || error
mount_partitions;
info "Root files will be transfered to device..." &&
@ -309,9 +318,9 @@ if mount | grep -q "$boot_partition_path"
then
info "$boot_partition_path is allready mounted..."
else
if mount | grep -q "$root_partition_path"
if mount | grep -q "$root_mapper_path"
then
info "$root_partition_path is allready mounted..."
info "$root_mapper_path is allready mounted..."
else
mount_partitions
fi
@ -418,34 +427,7 @@ fi
if [ "$encrypt_system" == "y" ]
then
# Adapted this instruction for setting up encrypted systems @see https://gist.github.com/gea0/4fc2be0cb7a74d0e7cc4322aed710d38
# The following variable is neccessary because of a bug @see https://bbs.archlinux.de/viewtopic.php?id=33554
encrypted_partition_uuid=$(blkid "$encrypted_partition_path" -s UUID -o value)
rescue_suffix=".$(date +%s).rescue"
mkinitcpio_path="/etc/mkinitcpio.conf"
mkinitcpio_rescue_path="$mkinitcpio_path$rescue_suffix"
mkinitcpio_search_modules="MODULES=()"
mkinitcpio_replace_modules="MODULES=(g_cdc usb_f_acm usb_f_ecm smsc95xx g_ether)"
mkinitcpio_search_binaries="BINARIES=()"
mkinitcpio_replace_binaries=$(echo "BINARIES=(/usr/lib/libgcc_s.so.1)"| sed -e 's/[\/&]/\\&/g')
mkinitcpio_search_hooks="HOOKS=(base udev autodetect modconf block filesystems keyboard fsck)"
mkinitcpio_replace_hooks="HOOKS=(base udev autodetect modconf block sleep netconf dropbear encryptssh filesystems keyboard fsck)"
root_mapper_path="/dev/mapper/root"
fstab_path="/mnt/etc/fstab"
fstab_rescue_path="$fstab_path$rescue_suffix"
crypttab_path="/mnt/etc/crypttab"
crypttab_rescue_path="$crypttab_path$rescue_suffix"
boot_txt_path="/boot/boot.txt"
boot_txt_rescue_path="$boot_txt_path$rescue_suffix"
boot_txt_delete_line=$(echo "part uuid \${devtype} \${devnum}:2 uuid" | sed -e 's/[]\/$*.^[]/\\&/g')
boot_txt_setenv_origin=$(echo "setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=\${uuid} rw rootwait smsc95xx.macaddr=\"\${usbethaddr}\"" | sed -e 's/[]\/$*.^[]/\\&/g')
boot_txt_setenv_replace=$(echo "setenv bootargs console=ttyS1,115200 console=tty0 ip=::::$target_hostname:eth0:dhcp cryptdevice=UUID=$encrypted_partition_uuid:root root=$root_mapper_path rw rootwait smsc95xx.macaddr=\"\${usbethaddr}\""| sed -e 's/[\/&]/\\&/g')
info "Setup encryption..." &&
question "Type in encryption password: " && read -r luks_password
question "Repeat encryption password:" && read -r luks_password_repeat
if [ "$luks_password" != "$luks_password_repeat" ]
then
error "Passwords didn't match."
fi
(
echo "pacman --noconfirm -S --needed $(get_packages "server/luks") &&"
echo "cp -v /home/$target_username/.ssh/authorized_keys /etc/dropbear/root_key &&"
@ -456,13 +438,8 @@ if [ "$encrypt_system" == "y" ]
echo "echo \"Content of $mkinitcpio_path:\$(cat \"$mkinitcpio_path\")\" &&"
#Concerning mkinitcpio warning @see https://gist.github.com/imrvelj/c65cd5ca7f5505a65e59204f5a3f7a6d
echo "mkinitcpio -P &&"
echo "echo '$luks_password' | sudo cryptsetup -v luksFormat -c aes-xts-plain64 -s 512 -h sha512 --use-random -i 1000 $encrypted_partition_path &&"
echo "echo '$luks_password' | sudo cryptsetup -v luksOpen $encrypted_partition_path root &&"
echo "mkfs.ext4 $root_mapper_path &&"
echo "mount $root_mapper_path /mnt &&"
echo "rsync --info=progress2 -axHAX / /mnt/ &&"
echo "cp -v $fstab_path $fstab_rescue_path &&"
echo "echo $root_mapper_path' / ext4 defaults,noatime 0 1' >> $fstab_path &&"
echo "echo '$root_mapper_path / ext4 defaults,noatime 0 1' >> $fstab_path &&"
echo "echo \"Content of $fstab_path:\$(cat \"$fstab_path\")\" &&"
echo "cp -v $crypttab_path $crypttab_rescue_path &&"
echo "echo 'root UUID=$encrypted_partition_uuid none luks' >> $crypttab_path &&"
@ -473,9 +450,7 @@ if [ "$encrypt_system" == "y" ]
echo "sed -i 's/$boot_txt_setenv_origin/$boot_txt_setenv_replace/g' $boot_txt_path &&"
echo "echo \"Content of $boot_txt_path:\$(cat \"$boot_txt_path\")\" &&"
echo "cd /boot/ && ./mkscr &&"
echo "umount $root_mapper_path &&"
echo "sudo cryptsetup -v luksClose root &&"
echo "exit || echo 'Error in chroot environment!' echo 'Trying to close decrypted root.'; sudo cryptsetup -v luksClose root"
echo "exit || echo 'Error in chroot environment!'"
) | chroot "$root_mount_path" /bin/bash || error
fi