#!/usr/bin/lua
local nixio = require "nixio"
local posix
local defkey = nixio.meta_tls_context.tls_defaultkey
if not defkey or io.open(defkey) then
	os.exit(0)
end

if os.execute("which openssl >/dev/null") == 0 then
	io.stderr:write("Warning: OpenSSL detected "..
	"but it looks like nixio was linked against axtls\n")
	os.execute("umask 0077;openssl genrsa -out '" .. defkey .. "' 2048")
elseif os.execute("which dropbearkey >/dev/null && which dropbearconvert >/dev/null") == 0 then
	os.execute("dropbearkey -t rsa -s 2048 -f /tmp/dbkey.rsa")
	os.execute("umask 0077;dropbearconvert dropbear openssh /tmp/dbkey.rsa '"..defkey.."'")
	os.remove("/tmp/dbkey.rsa")
else
	io.stderr:write("No key generators available! Giving up.")
	os.exit(1)
end