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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.zookeeper.client;
import com.yahoo.security.tls.MixedMode;
import com.yahoo.security.tls.TlsContext;
import com.yahoo.security.tls.TransportSecurityUtils;
import org.apache.zookeeper.client.ZKClientConfig;
import org.apache.zookeeper.server.quorum.QuorumPeerConfig;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.stream.Collectors;
/**
* Builder for ZK client configuration
*
* @author bjorncs
*/
public class ZkClientConfigBuilder {
public static final String CLIENT_SECURE_PROPERTY = "zookeeper.client.secure";
public static final String SSL_CONTEXT_SUPPLIER_CLASS_PROPERTY = "zookeeper.ssl.context.supplier.class";
public static final String SSL_ENABLED_PROTOCOLS_PROPERTY = "zookeeper.ssl.enabledProtocols";
public static final String SSL_ENABLED_CIPHERSUITES_PROPERTY = "zookeeper.ssl.ciphersuites";
public static final String SSL_CLIENTAUTH_PROPERTY = "zookeeper.ssl.clientAuth";
public static final String CLIENT_CONNECTION_SOCKET = "zookeeper.clientCnxnSocket";
private static final TlsContext defaultTlsContext = getTlsContext().orElse(null);
private final TlsContext tlsContext;
public ZkClientConfigBuilder() {
this(defaultTlsContext);
}
ZkClientConfigBuilder(TlsContext tlsContext) {
this.tlsContext = tlsContext;
}
public ZKClientConfig toConfig(Path configFile) throws IOException, QuorumPeerConfig.ConfigException {
String configString = toConfigString();
Files.createDirectories(configFile.getParent());
Path tempFile = Files.createTempFile(configFile.toAbsolutePath().getParent(), "." + configFile.getFileName(), ".tmp");
Files.writeString(tempFile, configString);
Files.move(tempFile, configFile, StandardCopyOption.ATOMIC_MOVE);
return new ZKClientConfig(configFile.toString());
}
public ZKClientConfig toConfig() {
ZKClientConfig config = new ZKClientConfig();
Map<String, String> configProperties = toConfigProperties();
configProperties.forEach(config::setProperty);
return config;
}
public String toConfigString() {
StringBuilder builder = new StringBuilder();
Map<String, String> properties = toConfigProperties();
properties.forEach((key, value) -> builder.append(key).append('=').append(value).append('\n'));
return builder.toString();
}
public Map<String, String> toConfigProperties() {
Map<String, String> builder = new HashMap<>();
builder.put(CLIENT_SECURE_PROPERTY, Boolean.toString(tlsContext != null));
builder.put(CLIENT_CONNECTION_SOCKET, "org.apache.zookeeper.ClientCnxnSocketNetty");
if (tlsContext != null) {
builder.put(SSL_CONTEXT_SUPPLIER_CLASS_PROPERTY, VespaSslContextProvider.class.getName());
String protocolsConfigValue = Arrays.stream(tlsContext.parameters().getProtocols()).sorted().collect(Collectors.joining(","));
builder.put(SSL_ENABLED_PROTOCOLS_PROPERTY, protocolsConfigValue);
String ciphersConfigValue = Arrays.stream(tlsContext.parameters().getCipherSuites()).sorted().collect(Collectors.joining(","));
builder.put(SSL_ENABLED_CIPHERSUITES_PROPERTY, ciphersConfigValue);
builder.put(SSL_CLIENTAUTH_PROPERTY, "NEED");
}
return Map.copyOf(builder);
}
private static Optional<TlsContext> getTlsContext() {
if (TransportSecurityUtils.getInsecureMixedMode() == MixedMode.PLAINTEXT_CLIENT_MIXED_SERVER) return Optional.empty();
return TransportSecurityUtils.getSystemTlsContext();
}
}
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