#!/bin/sh

for type in rsa dss; do {
  # check for keys
  key=/tmp/dropbear/dropbear_${type}_host_key
  [ ! -f $key ] && {
    # generate missing keys
    mkdir -p /tmp/dropbear
    [ -x /usr/bin/dropbearkey ] && {
      /usr/bin/dropbearkey -t $type -f $key 2>&- >&- && exec $0 $*
    } &
    exit 0
  }
}; done

umask 077
/usr/sbin/dropbear