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// 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 com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.http.client.HttpRequestRetryHandler;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.methods.RequestBuilder;
import org.apache.http.conn.ssl.SSLContextBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpRequestRetryHandler;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.util.EntityUtils;
import org.eclipse.jetty.http.HttpStatus;
import javax.net.ssl.SSLContext;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.URI;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.PrivateKey;
import java.security.UnrecoverableKeyException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
/**
* @author mortent
* @author bjorncs
*/
public class AthenzService {
private static final String INSTANCE_API_PATH = "zts/v1/instance";
private final ObjectMapper objectMapper = new ObjectMapper();
private final HttpRequestRetryHandler retryHandler = new DefaultHttpRequestRetryHandler(3, /*requestSentRetryEnabled*/true);
/**
* Send instance register request to ZTS, get InstanceIdentity
*/
public InstanceIdentity sendInstanceRegisterRequest(InstanceRegisterInformation instanceRegisterInformation,
URI uri) {
try(CloseableHttpClient client = HttpClientBuilder.create().setRetryHandler(retryHandler).build()) {
HttpUriRequest postRequest = RequestBuilder.post()
.setUri(uri.resolve(INSTANCE_API_PATH))
.setEntity(toJsonStringEntity(instanceRegisterInformation))
.build();
return getInstanceIdentity(client, postRequest);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
public InstanceIdentity sendInstanceRefreshRequest(String providerService,
String instanceDomain,
String instanceServiceName,
String instanceId,
InstanceRefreshInformation instanceRefreshInformation,
URI ztsEndpoint,
X509Certificate certicate,
PrivateKey privateKey) {
try (CloseableHttpClient client = createHttpClientWithTlsAuth(certicate, privateKey, retryHandler)) {
String uriPath = String.format(
"%s/%s/%s/%s/%s",
INSTANCE_API_PATH, providerService, instanceDomain, instanceServiceName, instanceId);
HttpUriRequest postRequest = RequestBuilder.post()
.setUri(ztsEndpoint.resolve(uriPath))
.setEntity(toJsonStringEntity(instanceRefreshInformation))
.build();
return getInstanceIdentity(client, postRequest);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
private InstanceIdentity getInstanceIdentity(CloseableHttpClient client, HttpUriRequest postRequest)
throws IOException {
try (CloseableHttpResponse response = client.execute(postRequest)) {
if(HttpStatus.isSuccess(response.getStatusLine().getStatusCode())) {
return objectMapper.readValue(response.getEntity().getContent(), InstanceIdentity.class);
} else {
String message = EntityUtils.toString(response.getEntity());
throw new RuntimeException(String.format("Unable to get identity. http code/message: %d/%s",
response.getStatusLine().getStatusCode(), message));
}
}
}
private StringEntity toJsonStringEntity(Object value) throws JsonProcessingException {
return new StringEntity(objectMapper.writeValueAsString(value), ContentType.APPLICATION_JSON);
}
private static CloseableHttpClient createHttpClientWithTlsAuth(X509Certificate certificate,
PrivateKey privateKey,
HttpRequestRetryHandler retryHandler) {
try {
String dummyPassword = "athenz";
KeyStore keyStore = KeyStore.getInstance("JKS");
keyStore.load(null);
keyStore.setKeyEntry("athenz", privateKey, dummyPassword.toCharArray(), new Certificate[]{certificate});
SSLContext sslContext = new SSLContextBuilder()
.loadKeyMaterial(keyStore, dummyPassword.toCharArray())
.build();
return HttpClientBuilder.create()
.setRetryHandler(retryHandler)
.setSslcontext(sslContext)
.build();
} catch (KeyStoreException | UnrecoverableKeyException | NoSuchAlgorithmException |
KeyManagementException | CertificateException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
}
}
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