private static PrivateKey getKeyFromKeystore() throws Exception {
return (PrivateKey) loadKeystore().getKey("ECDSA", "security".toCharArray());
}
static KeyAccessor getKeyAccessor() {
KeyAccessor accessor = new KeyAccessor() {
@Override
public KeySelector getKeySelector(Message message) throws Exception {
return KeySelector.singletonKeySelector(getKeyFromKeystore());
}