HttpClient为Kerberos身份验证设置凭据

Question

我正在尝试使用kerberos / HTTP主机进行身份验证。使用Apache HttpClient作为我的客户端-
以及此源的略微修改版本。
我的Kerberos身份验证非常顺利，我希望知道如何以编程方式设置登录凭据。目前，凭据是通过控制台手动输入的，但是我想在运行时选择它。[实际上，正如我希望对大量用户进行自动化和负载测试的服务器。]。

编辑：这是相关部分的代码片段：

..
        NegotiateSchemeFactory nsf = new NegotiateSchemeFactory();        
        httpclient.getAuthSchemes().register(AuthPolicy.SPNEGO, nsf);

        Credentials use_jaas_creds = new Credentials() {

            public String getPassword() {
                return null;
            }

            public Principal getUserPrincipal() {
                return null;
            }    
        };

        httpclient.getCredentialsProvider().setCredentials(
                new AuthScope(null, -1, null),
                use_jaas_creds);

        HttpUriRequest request = new HttpGet("http://kerberoshost/");
        HttpResponse response = httpclient.execute(request);
 ..

该接口Credentials有两种方法-
getPassword()和和getUserPrincipal()，但是从我进行的一些调试来看，它们似乎根本没有被调用。

我在这里想念什么？静态设置凭据的更简洁方法是什么？

之前曾问过一个非常类似的问题，但是keytabs/ login.conf的破解太麻烦了，对于具有大量用户凭据的自动负载测试而言，不是一个可行的选择。感谢对此的任何帮助。

Answer 1

由于SPNEGO的原因，httpclient不会使用您发布的代码段（凭据类的东西设置）进行身份验证。

您可以使用DoAs + CallBackhandler在运行时传递用户名和密码。

然后，您需要一个login.conf或其中包含以下名称的任何名称：

KrbLogin{
 com.sun.security.auth.module.Krb5LoginModule required doNotPrompt=false debug=true useTicketCache=false;
};

您可以将名称从“ KrbLogin”更改为所需的名称（请记住在Java代码中使用相同的名称）

并使用java系统属性进行设置：

System.setProperty("java.security.auth.login.config", "login.conf");

或与

-Djava.security.auth.login.config=login.config

然后，您需要一个krb5配置文件（通常是krb5.ini或krb5.conf，其中的配置正确）

如果您的工作站（或服务器）已为Kerberos正确配置，则该类应按原样工作（使用适当的文件login.conf和krb5.ini），我使用了httpclient
4.3.3和Java 1.7对其进行了测试：

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthSchemeProvider;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.HttpClient;
import org.apache.http.client.config.AuthSchemes;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.impl.auth.SPNegoSchemeFactory;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import javax.security.auth.Subject;
import javax.security.auth.callback.*;
import javax.security.auth.login.LoginContext;
import javax.security.auth.login.LoginException;
import java.io.IOException;
import java.security.AccessController;
import java.security.Principal;
import java.security.PrivilegedAction;
import java.util.Set;

public class HttpClientKerberosDoAS {

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

        System.setProperty("java.security.auth.login.config", "login.conf");
        System.setProperty("java.security.krb5.conf", "krb5.conf");
        System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");

        String user = "";
        String password = "";
        String url = "";

        if (args.length == 3) {
            user = args[0];
            password = args[1];
            url = args[2];


            HttpClientKerberosDoAS kcd = new HttpClientKerberosDoAS();

            System.out.println("Loggin in with user [" + user + "] password [" + password + "] ");
            kcd.test(user, password, url);
        } else {
            System.out.println("run with User Password URL");
        }

    }

    public void test(String user, String password, final String url) {
        try {

            LoginContext loginCOntext = new LoginContext("KrbLogin", new KerberosCallBackHandler(user, password));
            loginCOntext.login();

            PrivilegedAction sendAction = new PrivilegedAction() {

                @Override
                public Object run() {
                    try {

                        Subject current = Subject.getSubject(AccessController.getContext());
                        System.out.println("----------------------------------------");
                        Set<Principal> principals = current.getPrincipals();
                        for (Principal next : principals) {
                            System.out.println("DOAS Principal: " + next.getName());
                        }
                        System.out.println("----------------------------------------");

                        call(url);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return true;
                }
            };

            Subject.doAs(loginCOntext.getSubject(), sendAction);

        } catch (LoginException le) {
            le.printStackTrace();
        }
    }

    private void call(String url) throws IOException {
        HttpClient httpclient = getHttpClient();

        try {

            HttpUriRequest request = new HttpGet(url);
            HttpResponse response = httpclient.execute(request);
            HttpEntity entity = response.getEntity();

            System.out.println("----------------------------------------");

            System.out.println("STATUS >> " + response.getStatusLine());

            if (entity != null) {
                System.out.println("RESULT >> " + EntityUtils.toString(entity));
            }

            System.out.println("----------------------------------------");

            EntityUtils.consume(entity);

        } finally {
            httpclient.getConnectionManager().shutdown();
        }
    }

    private  HttpClient getHttpClient() {

        Credentials use_jaas_creds = new Credentials() {
            public String getPassword() {
                return null;
            }

            public Principal getUserPrincipal() {
                return null;
            }
        };

        CredentialsProvider credsProvider = new BasicCredentialsProvider();
        credsProvider.setCredentials(new AuthScope(null, -1, null), use_jaas_creds);
        Registry<AuthSchemeProvider> authSchemeRegistry = RegistryBuilder.<AuthSchemeProvider>create().register(AuthSchemes.SPNEGO, new SPNegoSchemeFactory(true)).build();
        CloseableHttpClient httpclient = HttpClients.custom().setDefaultAuthSchemeRegistry(authSchemeRegistry).setDefaultCredentialsProvider(credsProvider).build();

        return httpclient;
    }

    class KerberosCallBackHandler implements CallbackHandler {

        private final String user;
        private final String password;

        public KerberosCallBackHandler(String user, String password) {
            this.user = user;
            this.password = password;
        }

        public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {

            for (Callback callback : callbacks) {

                if (callback instanceof NameCallback) {
                    NameCallback nc = (NameCallback) callback;
                    nc.setName(user);
                } else if (callback instanceof PasswordCallback) {
                    PasswordCallback pc = (PasswordCallback) callback;
                    pc.setPassword(password.toCharArray());
                } else {
                    throw new UnsupportedCallbackException(callback, "Unknown Callback");
                }

            }
        }
    }

}

注意：

您可以使用：

System.setProperty("sun.security.krb5.debug", "true");

要么：

-Dsun.security.krb5.debug=true

调查问题。