#!/bin/bash

getRandomPasswd() {
    local k

    while :; do
        k=$(tr -dc _A-Z-a-z-0-9 < /dev/urandom 2> /dev/null | head -c${1:-32} )
        if [ $(echo -n $k | wc -c) = 32 ]; then
            break
        fi
        echo "Wait for entropy avail : $(cat /proc/sys/kernel/random/entropy_avail)" >&2
        sleep 1
    done
    echo -n $k
}

# main 

echo "=== $0"


if [ ! -e /etc/vdn-$MODE-initialized ]; then

    # regenerate ssh_host_keys

    rm -f /etc/ssh/ssh_host_*

    dpkg-reconfigure openssh-server

    #systemctl restart ssh

    # Random root and test password

    echo "Random passwords."

    k=$(getRandomPasswd)
    #echo "root passwd : $k"
    passwdRoot=$k #$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c${1:-32};)
    k=$(getRandomPasswd)
    #echo "test passwd : $k"
    passwdTest=$k #$(cat /dev/urandom | tr -dc _A-Z-a-z-0-9 | head -c${1:-32};)

    cat <<- EOF | chpasswd
root:$passwdRoot
test:$passwdTest    
EOF

    touch /etc/vdn-$MODE-initialized

fi