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#!/bin/bash
# Generate host keys
if [ ! -f "/boot/ssh_host_rsa_key" ]; then
echo Generating new SSH host keys, please stand by...
echo Remounting /boot FAT32 partition as writable. Do not power off!
mount -o remount,rw /boot
ssh-keygen -q -N "" -t rsa -b 2048 -f /boot/ssh_host_rsa_key
ssh-keygen -q -N "" -t ed25519 -f /boot/ssh_host_ed25519_key
mount -o remount,ro /boot
sleep 5
mount -o remount,ro /boot
sync
echo Remounted /boot FAT32 partition as read-only.
fi
# Copy host keys into temp dir
cp /boot/ssh_host_ed25519_key /root/.ssh/ssh_host_ed25519_key
cp /boot/ssh_host_ed25519_key.pub /root/.ssh/ssh_host_ed25519_key.pub
cp /boot/ssh_host_rsa_key /root/.ssh/ssh_host_rsa_key
cp /boot/ssh_host_rsa_key.pub /root/.ssh/ssh_host_rsa_key.pub
# Copy authorized_keys file into /root and /home/pi .ssh directories
if [ -f "/boot/authorized_keys" ]; then
cp /boot/authorized_keys /root/.ssh/authorized_keys
cp /boot/authorized_keys /home/pi/.ssh/authorized_keys
chown -hR pi:pi /home/pi/.ssh
chmod -R 700 /home/pi/.ssh
fi
chown -hR root:root /root/.ssh
chmod -R 700 /root/.ssh