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redpitaya-puzzlefw
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Generate SSH host key on first boot

This commit is contained in:
Joris van Rantwijk 2024-10-13 10:35:19 +02:00
parent 82e6fdf194
commit 2d315fdf26
3 changed files with 10 additions and 17 deletions
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5
sw/22_prepare_sdcard.sh
View File

@ -29,11 +29,6 @@ cp -a "$BUILDROOT_DIR/output/images/rootfs.cpio.uboot" "$SDCARD_DIR"
# Wrap U-Boot script in image file # Wrap U-Boot script in image file
$MKIMAGE -A arm -T script -d config/uboot_script.txt "$SDCARD_DIR/boot.scr" $MKIMAGE -A arm -T script -d config/uboot_script.txt "$SDCARD_DIR/boot.scr"
# Create SSH host key for embedded system
if [ ! -f "$SDCARD_DIR/dropbear_ed25519_host_key" ]; then
dropbearkey -t ed25519 -f "$SDCARD_DIR/dropbear_ed25519_host_key"
fi
# Copy FPGA firmware # Copy FPGA firmware
cp -a $FIRMWARE_FILES "$SDCARD_DIR" cp -a $FIRMWARE_FILES "$SDCARD_DIR"

19
sw/buildroot_overlay/etc/init.d/S10prepare_dropbear.sh
View File

@ -3,6 +3,8 @@
# Load SSH host key from SD card. # Load SSH host key from SD card.
# #
. /opt/puzzlefw/lib/functions.sh
start() { start() {
# If host key exists, do nothing. # If host key exists, do nothing.
@ -14,20 +16,15 @@ start() {
# Create directory /etc/dropbear if it does not exist. # Create directory /etc/dropbear if it does not exist.
mkdir -p /etc/dropbear mkdir -p /etc/dropbear
# Try to copy SSH host key from SD card. # Try to copy SSH host key from configuration files.
mkdir -p /mnt/tmp_sdcard if ! cp -p ${CONFIG_DIR}/dropbear_ed25519_host_key /etc/dropbear ; then
mount -t vfat -o fmask=0177 -r /dev/mmcblk0p1 /mnt/tmp_sdcard
if ! cp -p /mnt/tmp_sdcard/dropbear_ed25519_host_key /etc/dropbear ; then
echo "WARNING: Failed to load SSH host key from SD card" >&2 echo "WARNING: Failed to load SSH host key from SD card" >&2
umount /mnt/tmp_sdcard echo "Generating new SSH host key." >&2
rmdir /mnt/tmp_sdcard dropbearkey -t ed25519 -f ${CONFIG_DIR}/dropbear_ed25519_host_key.new
exit 1 sync_config dropbear_ed25519_host_key
cp -p ${CONFIG_DIR}/dropbear_ed25519_host_key /etc/dropbear
fi fi
umount /mnt/tmp_sdcard
rmdir /mnt/tmp_sdcard
chmod 0600 /etc/dropbear/dropbear_ed25519_host_key chmod 0600 /etc/dropbear/dropbear_ed25519_host_key
} }

3
sw/buildroot_overlay/opt/puzzlefw/lib/functions.sh
View File

@ -32,7 +32,8 @@ read_config() {
mount -t ext4 -r -o noatime,data=journal /dev/${CONFIG_PARTITION} $CONFIG_MOUNTPOINT || return 1 mount -t ext4 -r -o noatime,data=journal /dev/${CONFIG_PARTITION} $CONFIG_MOUNTPOINT || return 1
# Copy config files to RAM filesystem. # Copy config files to RAM filesystem.
cp -a ${CONFIG_MOUNTPOINT}/*.conf $CONFIG_DIR cp -a ${CONFIG_MOUNTPOINT}/*.conf $CONFIG_DIR || true
cp -a ${CONFIG_MOUNTPOINT}/dropbear_* $CONFIG_DIR || true
umount $CONFIG_MOUNTPOINT umount $CONFIG_MOUNTPOINT
} }