com.github.triceo.robozonky.app.configuration.SecretProviderFactory Maven / Gradle / Ivy
/*
* Copyright 2017 Lukáš Petrovický
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.github.triceo.robozonky.app.configuration;
import java.io.File;
import java.io.IOException;
import java.security.KeyStoreException;
import java.util.Optional;
import com.github.triceo.robozonky.app.authentication.SecretProvider;
import com.github.triceo.robozonky.app.util.KeyStoreHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class SecretProviderFactory {
private static final Logger LOGGER = LoggerFactory.getLogger(SecretProviderFactory.class);
private static final File DEFAULT_KEYSTORE = new File("robozonky.keystore");
private static SecretProvider newSecretProvider(final String username, final char[] password,
final File keyStoreLocation) throws IOException, KeyStoreException {
final KeyStoreHandler ksh = KeyStoreHandler.create(keyStoreLocation, password);
SecretProviderFactory.LOGGER.info("Guarded storage was created with your username and password: {}",
keyStoreLocation);
return SecretProvider.keyStoreBased(ksh, username, password);
}
private static SecretProvider existingSecretProvider(final char[] password, final File keyStoreLocation)
throws IOException, KeyStoreException {
final KeyStoreHandler ksh = KeyStoreHandler.open(keyStoreLocation, password);
return SecretProvider.keyStoreBased(ksh);
}
/**
* Obtain keystore-based secret provider if possible.
*
* @param cli Command line interface coming from the application.
* @param defaultKeyStore The default file to store the keystore in when the user specified none.
* @return KeyStore-based secret provider or empty in case of a problem happened inside the keystore.
* @throws KeyStoreException In case keystores are unsupported on this JRE. Unlikely with Java 8, but seen happen.
*/
static Optional newSecretProvider(final CommandLineInterface cli, final File defaultKeyStore)
throws KeyStoreException {
final Optional keyStoreLocation = cli.getAuthenticationFragment().getKeystore();
final char[] password = cli.getAuthenticationFragment().getPassword();
if (keyStoreLocation.isPresent()) { // if user requests keystore, cli is only used to retrieve keystore file
try {
return Optional.of(SecretProviderFactory.existingSecretProvider(password, keyStoreLocation.get()));
} catch (final IOException ex) {
SecretProviderFactory.LOGGER.error("Failed opening guarded storage.", ex);
return Optional.empty();
}
} else { // else everything is read from the cli and put into a keystore
final Optional usernameProvided = cli.getAuthenticationFragment().getUsername();
final boolean storageExists = defaultKeyStore.canRead();
if (storageExists) {
if (defaultKeyStore.delete()) { // will create a new guided storage
SecretProviderFactory.LOGGER.info("Using plain-text credentials when guarded storage available. " +
"Consider switching.");
} else {
SecretProviderFactory.LOGGER.error("Stale guarded storage is present and can not be deleted.");
return Optional.empty();
}
} else if (!usernameProvided.isPresent()) {
SecretProviderFactory.LOGGER.error("When not using guarded storage, username must be provided.");
return Optional.empty();
}
try {
final SecretProvider secrets =
SecretProviderFactory.newSecretProvider(usernameProvided.get(), password, defaultKeyStore);
return Optional.of(secrets);
} catch (final IOException ex) {
SecretProviderFactory.LOGGER.error("Failed reading guarded storage.", ex);
return Optional.empty();
}
}
}
static Optional getFallbackSecretProvider(final CommandLineInterface cli) {
SecretProviderFactory.LOGGER.info("You should get a better Java runtime.");
final AuthenticationCommandLineFragment cliAuth = cli.getAuthenticationFragment();
return cliAuth.getKeystore()
.map(keyStore -> { // keystore is demanded but apparently unsupported, fail
SecretProviderFactory.LOGGER.error("No KeyStore support detected, yet it is demanded.");
return Optional.empty();
}).orElseGet(() -> { // keystore is optional, fall back to other means
SecretProviderFactory.LOGGER.warn("No KeyStore support detected, storing password insecurely.");
return Optional.of(SecretProvider.fallback(cliAuth.getUsername().get(), cliAuth.getPassword()));
});
}
public static Optional getSecretProvider(final CommandLineInterface cli) {
try {
return SecretProviderFactory.newSecretProvider(cli, SecretProviderFactory.DEFAULT_KEYSTORE);
} catch (final KeyStoreException ex) {
return SecretProviderFactory.getFallbackSecretProvider(cli);
}
}
}