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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.security.tls;
import com.yahoo.security.SslContextBuilder;
import com.yahoo.security.tls.authz.PeerAuthorizerTrustManager;
import com.yahoo.security.tls.authz.PeerAuthorizerTrustManagersFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLEngine;
import java.nio.file.Path;
import java.time.Duration;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* A {@link TlsContext} that regularly reloads the credentials referred to from the transport security options file.
*
* @author bjorncs
*/
public class ConfigFileManagedTlsContext implements TlsContext {
private static final Duration UPDATE_PERIOD = Duration.ofHours(1);
private static final Logger log = Logger.getLogger(ConfigFileManagedTlsContext.class.getName());
private final Path tlsOptionsConfigFile;
private final PeerAuthorizerTrustManager.Mode mode;
private final AtomicReference<SSLContext> currentSslContext;
private final ScheduledExecutorService scheduler =
Executors.newSingleThreadScheduledExecutor(runnable -> {
Thread thread = new Thread(runnable, "tls-context-reloader");
thread.setDaemon(true);
return thread;
});
public ConfigFileManagedTlsContext(Path tlsOptionsConfigFile, PeerAuthorizerTrustManager.Mode mode) {
this.tlsOptionsConfigFile = tlsOptionsConfigFile;
this.mode = mode;
this.currentSslContext = new AtomicReference<>(createSslContext(tlsOptionsConfigFile, mode));
this.scheduler.scheduleAtFixedRate(new SslContextReloader(),
UPDATE_PERIOD.getSeconds()/*initial delay*/,
UPDATE_PERIOD.getSeconds(),
TimeUnit.SECONDS);
}
public SSLEngine createSslEngine() {
return currentSslContext.get().createSSLEngine();
}
private static SSLContext createSslContext(Path tlsOptionsConfigFile, PeerAuthorizerTrustManager.Mode mode) {
TransportSecurityOptions options = TransportSecurityOptions.fromJsonFile(tlsOptionsConfigFile);
SslContextBuilder builder = new SslContextBuilder();
options.getCertificatesFile()
.ifPresent(certificates -> builder.withKeyStore(options.getPrivateKeyFile().get(), certificates));
options.getCaCertificatesFile().ifPresent(builder::withTrustStore);
options.getAuthorizedPeers().ifPresent(
authorizedPeers -> builder.withTrustManagerFactory(new PeerAuthorizerTrustManagersFactory(authorizedPeers, mode)));
return builder.build();
}
@Override
public void close() {
try {
scheduler.shutdownNow();
scheduler.awaitTermination(5, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
private class SslContextReloader implements Runnable {
@Override
public void run() {
try {
currentSslContext.set(createSslContext(tlsOptionsConfigFile, mode));
} catch (Throwable t) {
log.log(Level.SEVERE, String.format("Failed to load SSLContext (path='%s'): %s", tlsOptionsConfigFile, t.getMessage()), t);
}
}
}
}
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