httpclient5-testing/src/test/java/org/apache/hc/client5/testing/sync/TestWindowsNegotiateScheme.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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package org.apache.hc.client5.testing.sync;

import org.apache.hc.client5.http.auth.AuthSchemeFactory;
import org.apache.hc.client5.http.auth.StandardAuthScheme;
import org.apache.hc.client5.http.classic.methods.HttpGet;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
import org.apache.hc.client5.http.impl.classic.HttpClientBuilder;
import org.apache.hc.client5.http.impl.win.WinHttpClients;
import org.apache.hc.client5.http.impl.win.WindowsNegotiateSchemeGetTokenFail;
import org.apache.hc.core5.http.HttpHeaders;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.config.Registry;
import org.apache.hc.core5.http.config.RegistryBuilder;
import org.apache.hc.core5.http.io.entity.EntityUtils;
import org.junit.Assume;
import org.junit.Test;

/**
 * Unit tests for Windows negotiate authentication.
 */
public class TestWindowsNegotiateScheme extends LocalServerTestBase {

    @Test(timeout=30000) // this timeout (in ms) needs to be extended if you're actively debugging the code
    public void testNoInfiniteLoopOnSPNOutsideDomain() throws Exception {
        this.server.registerHandler("/", (request, response, context) -> {
            response.addHeader(HttpHeaders.WWW_AUTHENTICATE, StandardAuthScheme.SPNEGO);
            response.setCode(HttpStatus.SC_UNAUTHORIZED);
        });
        Assume.assumeTrue("Test can only be run on Windows", WinHttpClients.isWinAuthAvailable());

        // HTTPCLIENT-1545
        // If a service principal name (SPN) from outside your Windows domain tree (e.g., HTTP/example.com) is used,
        // InitializeSecurityContext will return SEC_E_DOWNGRADE_DETECTED (decimal: -2146892976, hex: 0x80090350).
        // Because WindowsNegotiateScheme wasn't setting the completed state correctly when authentication fails,
        // HttpClient goes into an infinite loop, constantly retrying the negotiate authentication to kingdom
        // come. This error message, "The system detected a possible attempt to compromise security. Please ensure that
        // you can contact the server that authenticated you." is associated with SEC_E_DOWNGRADE_DETECTED.

        final Registry<AuthSchemeFactory> authSchemeRegistry = RegistryBuilder.<AuthSchemeFactory>create()
            .register(StandardAuthScheme.SPNEGO, context -> new WindowsNegotiateSchemeGetTokenFail(StandardAuthScheme.SPNEGO, "HTTP/example.com")).build();
        final CloseableHttpClient customClient = HttpClientBuilder.create()
                .setDefaultAuthSchemeRegistry(authSchemeRegistry).build();

        final HttpHost target = start();
        final HttpGet httpGet = new HttpGet("/");
        try (final CloseableHttpResponse response = customClient.execute(target, httpGet)) {
            EntityUtils.consume(response.getEntity());
        }
    }

}