container-disc/src/main/java/com/yahoo/container/jdisc/athenz/impl/ServiceProviderApi.java


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63

// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.jdisc.athenz.impl;

import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.conn.ssl.TrustSelfSignedStrategy;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.eclipse.jetty.http.HttpStatus;

import java.io.IOException;
import java.net.URI;
import java.security.KeyManagementException;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;

/**
 * @author mortent
 */
public class ServiceProviderApi {

    private final URI providerUri;

    public ServiceProviderApi(String providerAddress) {
        providerUri = URI.create(String.format("https://%s:8443/athenz/v1/provider", providerAddress));
    }

    /**
     * Get signed identity document from config server
     */
    public String getSignedIdentityDocument() {
        try (CloseableHttpClient httpClient = createHttpClient()) {
            CloseableHttpResponse idDocResponse = httpClient.execute(RequestBuilder.get().setUri(providerUri + "/identity-document").build());
            if (HttpStatus.isSuccess(idDocResponse.getStatusLine().getStatusCode())) {
                return EntityUtils.toString(idDocResponse.getEntity());
            } else {
                // make sure we have retried a few times (AND logged) before giving up
                throw new RuntimeException("Failed to initialize Athenz instance provider");
            }
        } catch (IOException e) {
            throw new RuntimeException("Failed getting signed identity document", e);
        }
    }

    // TODO Use client side auth to establish trusted secure channel
    // TODO Validate TLS certifcate of config server
    private static CloseableHttpClient createHttpClient() {
        try {
            SSLContextBuilder sslContextBuilder = new SSLContextBuilder();
            sslContextBuilder.loadTrustMaterial(null, new TrustSelfSignedStrategy());
            SSLConnectionSocketFactory sslSocketFactory =
                    new SSLConnectionSocketFactory(sslContextBuilder.build(),
                                                   SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            return HttpClientBuilder.create().setSSLSocketFactory(sslSocketFactory).build();
        } catch (KeyManagementException | NoSuchAlgorithmException | KeyStoreException e) {
            throw new RuntimeException(e);
        }
    }

}