Apache HTTPClient DigestAuth 不转发来自 Challenge 的“不透明”值

Posted 2023-02-24

【中文标题】Apache HTTPClient DigestAuth 不转发来自 Challenge 的“不透明”值

【英文标题】：Apache HTTPClient DigestAuth doesn't forward "opaque" value from Challenge

【发布时间】：2018-10-28 02:55:54

【问题描述】：

我正在尝试对我无法控制的第 3 方 Web 服务使用带有 HTTP 客户端的 Digest 身份验证。

我从这里开始使用示例代码：

http://hc.apache.org/httpcomponents-client-4.5.x/httpclient/examples/org/apache/http/examples/client/ClientPreemptiveDigestAuthentication.java 

在尝试下面描述的下一步之前，我让它与httpbin.org 一起工作。

看来，我正在使用的目标第 3 方服务需要将 opaque 值从初始响应的 WWW-Authentication 标头复制到下一个请求的 Authorization 标头，如此处所述：

https://security.stackexchange.com/questions/24425/what-is-the-opaque-field-in-http-digest-access-authentication-used-for

但是，我打开了线路记录并逐步执行了代码（这实际上只是上面链接的示例代码，无需在此处复制/粘贴），我看到 opaque 没有被复制。

有什么想法可以防止它被复制吗？

我什至尝试覆盖 processChallenge 方法：

    DigestScheme digestAuth = new DigestScheme() 
        @Override
        public void processChallenge(
                Header header) throws MalformedChallengeException 

但似乎此时引入参数中的任何值在下一个请求中都会被忽略。

【参考方案1】：

最终通过显式覆盖 Authorize 标头来修复，而不是依赖 HttpClient 的内部自动完成：

package [...];

import java.util.Arrays;
import java.util.Map;
import java.util.stream.Collectors;

import org.apache.commons.io.IOUtils;
import org.apache.http.*;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.*;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.impl.auth.DigestScheme;
import org.apache.http.impl.client.*;
import org.testng.Assert;

public class DigestTest 

    private static final String URL
            = "https://...";

    private static final String PASSWORD = ...;

    private static final String USER = ...;

    public static void main(String[] args) throws Exception 

        new DigestTest().run();
    

    public void run() throws Exception 

        HttpGet httpget = new HttpGet(URL);

        HttpHost target
                = new HttpHost(httpget.getURI().getHost(), 443, "https");
        CredentialsProvider credsProvider = new BasicCredentialsProvider();

        UsernamePasswordCredentials credentials
                = new UsernamePasswordCredentials(USER, PASSWORD);
        credsProvider.setCredentials(
                new AuthScope(target.getHostName(), target.getPort()),
                credentials);

        CookieStore cookieStore = new BasicCookieStore();

        CloseableHttpClient httpclient
                = HttpClients.custom().setDefaultCookieStore(cookieStore)
                        .setDefaultCredentialsProvider(credsProvider).build();

        try 

            DigestScheme digestAuth = new DigestScheme();

            digestAuth.overrideParamter("qop", "auth");
            digestAuth.overrideParamter("nc", "0");
            digestAuth.overrideParamter("cnonce", DigestScheme.createCnonce());

            AuthCache authCache = new BasicAuthCache();
            authCache.put(target, digestAuth);

            HttpClientContext localContext = HttpClientContext.create();
            localContext.setAuthCache(authCache);

            CloseableHttpResponse response;

            response = httpclient.execute(target, httpget, localContext);
            Map<String, String> wwwAuth = Arrays
                    .stream(response.getHeaders("WWW-Authenticate")[0]
                            .getElements())
                    .collect(Collectors.toMap(HeaderElement::getName,
                            HeaderElement::getValue));

            // the first call ALWAYS fails with a 401
            Assert.assertEquals(response.getStatusLine().getStatusCode(), 401);

            digestAuth.overrideParamter("opaque", wwwAuth.get("opaque"));
            digestAuth.overrideParamter("nonce", wwwAuth.get("nonce"));
            digestAuth.overrideParamter("realm", wwwAuth.get("Digest realm"));
            Header authenticate = digestAuth.authenticate(credentials, httpget,
                    localContext);
            httpget.addHeader(authenticate);

            response = httpclient.execute(target, httpget, localContext);

            // the 2nd call is the real deal
            Assert.assertEquals(response.getStatusLine().getStatusCode(), 200);

            System.out.println(IOUtils
                    .toString(response.getEntity().getContent(), "utf-8"));

         finally 
            httpclient.close();