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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.ssl.impl;
import com.yahoo.component.AbstractComponent;
import com.yahoo.jdisc.http.ssl.SslContextFactoryProvider;
import com.yahoo.security.tls.TlsContext;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLParameters;
import java.util.Arrays;
/**
* A {@link SslContextFactoryProvider} that creates {@link SslContextFactory} instances from {@link TlsContext} instances.
*
* @author bjorncs
*/
public abstract class TlsContextBasedProvider extends AbstractComponent implements SslContextFactoryProvider {
protected abstract TlsContext getTlsContext(String containerId, int port);
@Override
public final SslContextFactory getInstance(String containerId, int port) {
TlsContext tlsContext = getTlsContext(containerId, port);
SSLContext sslContext = tlsContext.context();
SSLParameters parameters = tlsContext.parameters();
SslContextFactory.Server sslContextFactory = new SslContextFactory.Server();
sslContextFactory.setSslContext(sslContext);
sslContextFactory.setNeedClientAuth(parameters.getNeedClientAuth());
sslContextFactory.setWantClientAuth(parameters.getWantClientAuth());
String[] enabledProtocols = parameters.getProtocols();
sslContextFactory.setIncludeProtocols(enabledProtocols);
String[] supportedProtocols = sslContext.getSupportedSSLParameters().getProtocols();
sslContextFactory.setExcludeProtocols(createExclusionList(enabledProtocols, supportedProtocols));
String[] enabledCiphers = parameters.getCipherSuites();
String[] supportedCiphers = sslContext.getSupportedSSLParameters().getCipherSuites();
sslContextFactory.setIncludeCipherSuites(enabledCiphers);
sslContextFactory.setExcludeCipherSuites(createExclusionList(enabledCiphers, supportedCiphers));
return sslContextFactory;
}
private static String[] createExclusionList(String[] enabledValues, String[] supportedValues) {
return Arrays.stream(supportedValues)
.filter(supportedValue ->
Arrays.stream(enabledValues)
.noneMatch(enabledValue -> enabledValue.equals(supportedValue)))
.toArray(String[]::new);
}
}
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