从 Java 向 Azure API 应用程序进行身份验证

Authenticate to an Azure API App from Java(从 Java 向 Azure API 应用程序进行身份验证)

问题描述

我对这篇文章有类似的问题:使用 Azure API 应用程序进行身份验证ADAL 但在我的情况下，我有一个客户，其 Java 客户端托管在 JBoss 中，需要访问我的 API.该服务被保护为公共(经过身份验证)"，我从浏览器访问它没有任何问题.我知道我可以在 .net 中创建一个 Azure API 应用程序客户端，但我找不到任何关于如何从 Java 进行身份验证的示例.这目前是否可行，如果可以，是否有人有任何帮助的示例或建议?

I have a similar issue to this post:Authenticate to Azure API App using ADAL but in my case I have a customer with a Java client hosted in JBoss who needs access to my API. The service is secured as 'Public (authenticated)' and I don't have any issues accessing it from a browser. I know that I can create an Azure API App Client in .net but I can't find any samples on how to authenticate from Java. Is this currently possible and if so does anyone have any samples or advice that would help?

推荐答案

我查看了下面的一些文档，用 Java 制作了一个示例，用于从经过 AAD 身份验证的客户端调用 Azure API 应用程序.

I reviewed some documents below to make a sample in Java for calling an Azure API app from client authenticated by AAD.

作为参考:

1. https://azure.microsoft.com/en-us/documentation/articles/app-service-api-authentication-client-flow/
2. https://azure.microsoft.com/en-us/documentation/articles/app-service-api-dotnet-add-authentication/
3. https://azure.microsoft.com/zh-CN/documentation/articles/app-service-authentication-overview/

对于示例，我在 Eclipse 中创建了一个 maven 项目并使用了 libs adal4j、common-io &httpclient.下面是 pom.xml 文件中的依赖配置.

For the sample, I created a maven project in Eclipse and used libs adal4j, common-io & httpclient. Here is the dependencies configuration below in pom.xml file.

<dependencies>
    <dependency>
        <groupId>com.microsoft.azure</groupId>
        <artifactId>adal4j</artifactId>
        <version>1.1.2</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.5.1</version>
    </dependency>
</dependencies>

Public (authenticated)的服务保护示例代码，请注意代码中的注释.

The sample code for service secured as Public (authenticated), please pay attention to comments in code.

    String gateway_url = "https://<GatewayHost>.azurewebsites.net/";
    String app_id_uri = gateway_url + "login/aad";
    String authority = "https://login.microsoftonline.com/<aad-domain>.onmicrosoft.com";
    String clientId = "<clientId>";
    String clientSecret = "<key>";
    String url = "https://<ApiAppHost>.azurewebsites.net/...";
/*
 *  Get Access Token from Gateway Login URL with authentication provider name
 *  Note: Please refer to the aad sample in Java for Native Headless at https://github.com/Azure-Samples/active-directory-java-native-headless
 */
HttpsURLConnection conn = (HttpsURLConnection) new URL(app_id_uri).openConnection();
AuthenticationContext context = null;
    AuthenticationResult result = null;
    ExecutorService service = null;
    try {
        service = Executors.newFixedThreadPool(1);
        context = new AuthenticationContext(authority, false, service);
        ClientCredential credential = new ClientCredential(clientId, clientSecret);
        Future<AuthenticationResult> future = context.acquireToken(app_id_uri, credential, null);
        result = future.get();
    } finally {
        service.shutdown();
    }
    String accessToken = null;
    if (result == null) {
        throw new ServiceUnavailableException(
                "authentication result was null");
    } else {
        accessToken = result.getAccessToken();
        System.out.println("Access Token: " +accessToken);
    }
    /*
     * Using access token to get authentication token
     */
    String data = "{"access_token": ""+accessToken+""}";
    conn.setRequestMethod("POST");
    conn.setDoOutput(true);
    conn.addRequestProperty("Content-Length", data.length()+"");
    new DataOutputStream(conn.getOutputStream()).writeBytes(data);
    String authTokenResp = IOUtils.toString(conn.getInputStream());
    System.out.println("Get Authentication Token Response: " + authTokenResp);
    /*
     * The content of Authentication Token Response is as {"user": {"userId": "sid:xxx...xxx"}, "authenticationToken": "xxxx...xxxxx"}.
     * Need to extract the authenticationToken from Json.
     */
    Gson gson = new Gson();
    Map<String, Object> map = gson.fromJson(authTokenResp, Map.class);
    String authenticationToken = (String) map.get("authenticationToken");
    System.out.println("Authentication Token: "+authenticationToken);
    /*
     * Using authentication token as X-ZUMO-AUTH header to get data from Api App
     * Note: Must using Apache Common HttpClient supported HTTP 30x redirection, Class Http(s)URLConnection not support.
     *          There are three times continuous 302 redirection in accessing Api App with zumo token. 
     */
    HttpGet httpGet = new HttpGet(url);
    httpGet.addHeader("x-zumo-auth", authenticationToken);
    CloseableHttpClient httpclient = HttpClients.createDefault();
    HttpResponse resp = httpclient.execute(httpGet);
    String apiAppData = IOUtils.toString(resp.getEntity().getContent());
    System.out.println(apiAppData);

如有任何疑问，请随时告诉我.

Any concern, please feel free to let me know.

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