import javax.net.ssl.*;

static KeyManager keyManagerFromKeyStore(File keystoreFile, char[] passphrase) ctex {
  KeyStore keystore = keyStoreFromFile(keystoreFile, passphrase);
  KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
  keyManagerFactory.init(keystore, passphrase);
  ret getSingleton(keyManagerFactory.getKeyManagers());
}