java - 无法使用 AWS 安全 token 找到请求目标的有效证书路径

Question

我正在尝试实现以下 AWS 文章中介绍的解决方案:

• How to Eliminate the Need for Hardcoded AWS Credentials in Devices by Using the AWS IoT Credentials Provider

---

所以我做了接下来的步骤:

1. 创建本地 keystore :

   keystore winpty openssl pkcs12 -export -in eeb81a0eb6-certificate.pem.crt -inkey eeb81a0eb6-private.pem.key -name myname -out my.p12 -password pass:mypass

   keytool -importkeystore -destkeystore mykeystore.jks -srckeystore my.p12 -srcstoretype PKCS12 -deststorepass mypass -srcstorepass mypass

2. 创建本地信任库:

   keytool -keystore my_ca.jks -alias myalias -import -file AmazonRootCA1.pem

3. 我的代码:

public class AWSSessionCredentialsProviderImpl implements AWSSessionCredentialsProvider  {
    
    private static final Logger LOGGER = LogManager.getLogger(AWSSessionCredentialsProviderImpl.class.getName());
    
    private final Gson gson = new Gson();
    
    private SdkHttpClient client;
    private HttpExecuteRequest request; 
    private String awsAccessKeyId;
    private String awsSecretAccessKeyId;
    private String awsSessionToken;
    
    public void init(String clientId) throws IOException, URISyntaxException {
        System.setProperty("javax.net.ssl.trustStore", Configuration.KEYSTOREPATH_CA.toAbsolutePath().toString());
        System.setProperty("javax.net.ssl.trustStoreType", "jks");
        
        try {
            System.setProperty("javax.net.ssl.trustStorePassword", new String(Files.readAllBytes(Configuration.KEYSTOREPATH_CA_PASS)));
        } catch (IOException e) {
            throw new IOException("Read password of trust store is failed", e);
        }
        
        
        System.setProperty("javax.net.ssl.keyStore", Configuration.KEYSTOREPATH.toAbsolutePath().toString());
        System.setProperty("javax.net.ssl.keyStoreType", "jks");
        
        try {
            System.setProperty("javax.net.ssl.keyStorePassword", new String(Files.readAllBytes(Configuration.KEYSTOREPATH_PASS)));
        } catch (IOException e) {
            throw new IOException("Read password of key store is failed", e);
        }

        client = ApacheHttpClient.builder().build();

        SdkHttpRequest httpRequest;
        try {
            httpRequest = SdkHttpFullRequest.builder()
                    .method(SdkHttpMethod.GET)
                    .uri(new URI(Configuration.CLIENT_ENDPOINT))
                    .putHeader("x-amzn-iot-thingname", clientId)
                    .build();
        } catch (URISyntaxException e) {
            throw new URISyntaxException(Configuration.CLIENT_ENDPOINT, "Building URI from client endpoint is failed");
        }

        request = HttpExecuteRequest.builder()
                .request(httpRequest)
                .build();
        try {
            setCredentials();
        } catch (IOException e) {
            throw new IOException("Set temporary credentials is failed", e);
        }
    }
    
    @Override
    public void refresh() {
        try {
            setCredentials();
        } catch (IOException e) {
            LOGGER.error("Refresh session credentials is failed", e);
        }
    }
    
    @Override
    public AWSSessionCredentials getCredentials() {
        return new BasicSessionCredentials(awsAccessKeyId, awsSecretAccessKeyId, awsSessionToken);
    }
    
    private void setCredentials() throws IOException {
        HttpExecuteResponse response = client.prepareRequest(request).call();
        String credStr = IoUtils.toUtf8String(response.responseBody().get());
        
        CredentialsJson credJson = gson.fromJson(credStr, CredentialsJson.class);
        awsAccessKeyId = credJson.credentials.accessKeyId;
        awsSecretAccessKeyId = credJson.credentials.secretAccessKey;
        awsSessionToken = credJson.credentials.sessionToken;
    }
}

因此，我成功获得了临时凭据，但是当我使用它们时:

AWSSessionCredentialsProviderImpl credentialsProvider = new AWSSessionCredentialsProviderImpl();
credentialsProvider.init("someid");

s3Client = AmazonS3ClientBuilder.standard()
                .withRegion(region)
                .withCredentials(credentialsProvider)
                .build();

s3Client.putObject(request); 

我收到以下异常:

Caused by:
sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

如果我能够成功获取临时凭据，我不明白为什么会出现此异常。

Answer 1

这个问题可能与很多事情有关。

您的 Java 程序很可能无法与远程对等点建立信任关系，这可能是因为 AWS CA 不是预配置的 JVM 可信 CA 之一。

我认为解决该问题的最佳方法是将您已有的 SdkHttpClient 也传递给 S3 客户端。

请注意，在您的示例代码中，您使用的是 AWS Java SDK 版本 1 类 AmazonS3ClientBuilder，同时其余代码使用的是 AWS SDK v2。

也许您可以将代码更新为 latest version of the S3Client并尝试这样的事情:

System.setProperty("javax.net.ssl.trustStore", Configuration.KEYSTOREPATH_CA.toAbsolutePath().toString());
System.setProperty("javax.net.ssl.trustStoreType", "jks");

try {
    System.setProperty("javax.net.ssl.trustStorePassword", new String(Files.readAllBytes(Configuration.KEYSTOREPATH_CA_PASS)));
} catch (IOException e) {
    throw new IOException("Read password of trust store is failed", e);
}


System.setProperty("javax.net.ssl.keyStore", Configuration.KEYSTOREPATH.toAbsolutePath().toString());
System.setProperty("javax.net.ssl.keyStoreType", "jks");

try {
    System.setProperty("javax.net.ssl.keyStorePassword", new String(Files.readAllBytes(Configuration.KEYSTOREPATH_PASS)));
} catch (IOException e) {
    throw new IOException("Read password of key store is failed", e);
}

SdkHttpClient client = ApacheHttpClient.builder().build();

// The idea is reuse the configured HTTP client, modify it as per your needs
AWSSessionCredentialsProviderImpl credentialsProvider = new AWSSessionCredentialsProviderImpl(client);
credentialsProvider.init("someid");

S3Client s3 = S3Client.builder()
  .httpClient(client)
  .region(region)
  .credentialsProvider(credentialsProvider)
  .build();

请确保您的信任存储区包含实际的 SSL 证书。您有AWS的根CA证书，但可能不是与实际服务对应的。

如有必要，您可以通过以下方式获取服务 SSL 证书:

openssl s_client -connect s3.us-west-1.amazonaws.com:443

请根据您所在的地区更改命令。您需要从响应中提取 PEM 内容。

如答案评论中所示，另一种替代方法可以取消设置在调用 S3Client 之前获取凭据时建立的 System 属性:

System.clearProperty("javax.net.ssl.trustStore");
System.clearProperty("javax.net.ssl.trustStorePassword");
System.clearProperty("javax.net.ssl.trustStoreType");

它将为 AWS SDK 提供调用 S3 的全新环境。