public static  Map<String, Object> createSslConfig(boolean useClientCert, boolean trustStore, ConnectionMode connectionMode, File trustStoreFile, String certAlias)
        throws IOException, GeneralSecurityException {
        return createSslConfig(useClientCert, trustStore, connectionMode, trustStoreFile, certAlias, "localhost");
    }
Creates a keystore with a single key and saves it to a file.

@param filename String file to save
@param password String store password to set on keystore
@param keyPassword String key password to set on key
@param alias String alias to use for the key
@param privateKey Key to save in keystore
@param cert Certificate to use as certificate chain associated to key
@throws GeneralSecurityException for any error with the security APIs
@throws IOException if there is an I/O error saving the file
clients/src/test/java/org/apache/kafka/test/TestSslUtils.java