InternalHttpsUtils.java

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package org.apache.doris.common.util;

import org.apache.doris.common.Config;

import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.KeyStore;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;

/**
 * Utility for creating SSL-aware HTTP clients for internal FE-to-FE communication.
 *
 * <p>Builds an {@link SSLContext} from the configured CA truststore once and caches it.
 * Hostname verification is disabled for IP-based intra-cluster connections.
 * Certificate rotation requires a FE restart.
 */
public class InternalHttpsUtils {
    private static volatile SSLContext cachedSslContext = null;

    private static final Logger LOG = LogManager.getLogger(InternalHttpsUtils.class);

    /**
     * Returns the cached SSLContext, building it from the configured truststore on first call.
     */
    public static SSLContext getSslContext() {
        if (cachedSslContext == null) {
            synchronized (InternalHttpsUtils.class) {
                if (cachedSslContext == null) {
                    cachedSslContext = buildSslContext();
                }
            }
        }
        return cachedSslContext;
    }

    private static SSLContext buildSslContext() {
        try {
            KeyStore trustStore = KeyStore.getInstance(Config.ssl_trust_store_type);
            try (InputStream stream = Files.newInputStream(
                    Paths.get(Config.mysql_ssl_default_ca_certificate))) {
                trustStore.load(stream, Config.mysql_ssl_default_ca_certificate_password.toCharArray());
            }

            TrustManagerFactory tmf = TrustManagerFactory.getInstance(
                    TrustManagerFactory.getDefaultAlgorithm());
            tmf.init(trustStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, tmf.getTrustManagers(), null);
            return sslContext;
        } catch (Exception e) {
            LOG.error("Failed to build SSLContext from truststore: {}",
                    Config.mysql_ssl_default_ca_certificate, e);
            throw new RuntimeException("Failed to build SSLContext from truststore", e);
        }
    }

    /**
     * Returns an HTTP client configured with the FE CA truststore and hostname verification disabled.
     */
    public static CloseableHttpClient createValidatedHttpClient() {
        SSLConnectionSocketFactory sslFactory = new SSLConnectionSocketFactory(
                getSslContext(),
                NoopHostnameVerifier.INSTANCE);

        return HttpClients.custom()
                .setSSLSocketFactory(sslFactory)
                .build();
    }
}