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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hadoop.security.ssl;
import com.google.common.annotations.VisibleForTesting;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.net.ssl.KeyManager;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.TrustManager;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import java.text.MessageFormat;
/**
* {@link KeyStoresFactory} implementation that reads the certificates from
* keystore files.
*
* if the trust certificates keystore file changes, the {@link TrustManager}
* is refreshed with the new trust certificate entries (using a
* {@link ReloadingX509TrustManager} trustmanager).
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class FileBasedKeyStoresFactory implements KeyStoresFactory {
private static final Logger LOG =
LoggerFactory.getLogger(FileBasedKeyStoresFactory.class);
public static final String SSL_KEYSTORE_LOCATION_TPL_KEY =
"ssl.{0}.keystore.location";
public static final String SSL_KEYSTORE_PASSWORD_TPL_KEY =
"ssl.{0}.keystore.password";
public static final String SSL_KEYSTORE_KEYPASSWORD_TPL_KEY =
"ssl.{0}.keystore.keypassword";
public static final String SSL_KEYSTORE_TYPE_TPL_KEY =
"ssl.{0}.keystore.type";
public static final String SSL_TRUSTSTORE_RELOAD_INTERVAL_TPL_KEY =
"ssl.{0}.truststore.reload.interval";
public static final String SSL_TRUSTSTORE_LOCATION_TPL_KEY =
"ssl.{0}.truststore.location";
public static final String SSL_TRUSTSTORE_PASSWORD_TPL_KEY =
"ssl.{0}.truststore.password";
public static final String SSL_TRUSTSTORE_TYPE_TPL_KEY =
"ssl.{0}.truststore.type";
public static final String SSL_EXCLUDE_CIPHER_LIST =
"ssl.{0}.exclude.cipher.list";
/**
* Default format of the keystore files.
*/
public static final String DEFAULT_KEYSTORE_TYPE = "jks";
/**
* Reload interval in milliseconds.
*/
public static final int DEFAULT_SSL_TRUSTSTORE_RELOAD_INTERVAL = 10000;
private Configuration conf;
private KeyManager[] keyManagers;
private TrustManager[] trustManagers;
private ReloadingX509TrustManager trustManager;
/**
* Resolves a property name to its client/server version if applicable.
*
* NOTE: This method is public for testing purposes.
*
* @param mode client/server mode.
* @param template property name template.
* @return the resolved property name.
*/
@VisibleForTesting
public static String resolvePropertyName(SSLFactory.Mode mode,
String template) {
return MessageFormat.format(
template, StringUtils.toLowerCase(mode.toString()));
}
/**
* Sets the configuration for the factory.
*
* @param conf the configuration for the factory.
*/
@Override
public void setConf(Configuration conf) {
this.conf = conf;
}
/**
* Returns the configuration of the factory.
*
* @return the configuration of the factory.
*/
@Override
public Configuration getConf() {
return conf;
}
/**
* Initializes the keystores of the factory.
*
* @param mode if the keystores are to be used in client or server mode.
* @throws IOException thrown if the keystores could not be initialized due
* to an IO error.
* @throws GeneralSecurityException thrown if the keystores could not be
* initialized due to a security error.
*/
@Override
public void init(SSLFactory.Mode mode)
throws IOException, GeneralSecurityException {
boolean requireClientCert =
conf.getBoolean(SSLFactory.SSL_REQUIRE_CLIENT_CERT_KEY,
SSLFactory.SSL_REQUIRE_CLIENT_CERT_DEFAULT);
// certificate store
String keystoreType =
conf.get(resolvePropertyName(mode, SSL_KEYSTORE_TYPE_TPL_KEY),
DEFAULT_KEYSTORE_TYPE);
KeyStore keystore = KeyStore.getInstance(keystoreType);
String keystoreKeyPassword = null;
if (requireClientCert || mode == SSLFactory.Mode.SERVER) {
String locationProperty =
resolvePropertyName(mode, SSL_KEYSTORE_LOCATION_TPL_KEY);
String keystoreLocation = conf.get(locationProperty, "");
if (keystoreLocation.isEmpty()) {
throw new GeneralSecurityException("The property '" + locationProperty +
"' has not been set in the ssl configuration file.");
}
String passwordProperty =
resolvePropertyName(mode, SSL_KEYSTORE_PASSWORD_TPL_KEY);
String keystorePassword = getPassword(conf, passwordProperty, "");
if (keystorePassword.isEmpty()) {
throw new GeneralSecurityException("The property '" + passwordProperty +
"' has not been set in the ssl configuration file.");
}
String keyPasswordProperty =
resolvePropertyName(mode, SSL_KEYSTORE_KEYPASSWORD_TPL_KEY);
// Key password defaults to the same value as store password for
// compatibility with legacy configurations that did not use a separate
// configuration property for key password.
keystoreKeyPassword = getPassword(
conf, keyPasswordProperty, keystorePassword);
if (LOG.isDebugEnabled()) {
LOG.debug(mode.toString() + " KeyStore: " + keystoreLocation);
}
InputStream is = new FileInputStream(keystoreLocation);
try {
keystore.load(is, keystorePassword.toCharArray());
} finally {
is.close();
}
if (LOG.isDebugEnabled()) {
LOG.debug(mode.toString() + " Loaded KeyStore: " + keystoreLocation);
}
} else {
keystore.load(null, null);
}
KeyManagerFactory keyMgrFactory = KeyManagerFactory
.getInstance(SSLFactory.SSLCERTIFICATE);
keyMgrFactory.init(keystore, (keystoreKeyPassword != null) ?
keystoreKeyPassword.toCharArray() : null);
keyManagers = keyMgrFactory.getKeyManagers();
//trust store
String truststoreType =
conf.get(resolvePropertyName(mode, SSL_TRUSTSTORE_TYPE_TPL_KEY),
DEFAULT_KEYSTORE_TYPE);
String locationProperty =
resolvePropertyName(mode, SSL_TRUSTSTORE_LOCATION_TPL_KEY);
String truststoreLocation = conf.get(locationProperty, "");
if (!truststoreLocation.isEmpty()) {
String passwordProperty = resolvePropertyName(mode,
SSL_TRUSTSTORE_PASSWORD_TPL_KEY);
String truststorePassword = getPassword(conf, passwordProperty, "");
if (truststorePassword.isEmpty()) {
// An empty trust store password is legal; the trust store password
// is only required when writing to a trust store. Otherwise it's
// an optional integrity check.
truststorePassword = null;
}
long truststoreReloadInterval =
conf.getLong(
resolvePropertyName(mode, SSL_TRUSTSTORE_RELOAD_INTERVAL_TPL_KEY),
DEFAULT_SSL_TRUSTSTORE_RELOAD_INTERVAL);
if (LOG.isDebugEnabled()) {
LOG.debug(mode.toString() + " TrustStore: " + truststoreLocation);
}
trustManager = new ReloadingX509TrustManager(truststoreType,
truststoreLocation,
truststorePassword,
truststoreReloadInterval);
trustManager.init();
if (LOG.isDebugEnabled()) {
LOG.debug(mode.toString() + " Loaded TrustStore: " + truststoreLocation);
}
trustManagers = new TrustManager[]{trustManager};
} else {
if (LOG.isDebugEnabled()) {
LOG.debug("The property '" + locationProperty + "' has not been set, " +
"no TrustStore will be loaded");
}
trustManagers = null;
}
}
String getPassword(Configuration conf, String alias, String defaultPass) {
String password = defaultPass;
try {
char[] passchars = conf.getPassword(alias);
if (passchars != null) {
password = new String(passchars);
}
}
catch (IOException ioe) {
LOG.warn("Exception while trying to get password for alias " + alias +
": " + ioe.getMessage());
}
return password;
}
/**
* Releases any resources being used.
*/
@Override
public synchronized void destroy() {
if (trustManager != null) {
trustManager.destroy();
trustManager = null;
keyManagers = null;
trustManagers = null;
}
}
/**
* Returns the keymanagers for owned certificates.
*
* @return the keymanagers for owned certificates.
*/
@Override
public KeyManager[] getKeyManagers() {
return keyManagers;
}
/**
* Returns the trustmanagers for trusted certificates.
*
* @return the trustmanagers for trusted certificates.
*/
@Override
public TrustManager[] getTrustManagers() {
return trustManagers;
}
}
