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+/**
+ * ============LICENSE_START=======================================================
+ * org.onap.aai
+ * ================================================================================
+ * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright © 2017 Amdocs
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ *
+ * ECOMP is a trademark and service mark of AT&T Intellectual Property.
+ */
+package org.onap.aai.restclient.rest;
+
+import java.io.FileInputStream;
+import java.security.KeyStore;
+import java.security.cert.X509Certificate;
+
+import javax.net.ssl.HostnameVerifier;
+import javax.net.ssl.KeyManagerFactory;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+
+import org.onap.aai.restclient.enums.RestAuthenticationMode;
+
+import com.sun.jersey.api.client.Client;
+import com.sun.jersey.api.client.config.ClientConfig;
+import com.sun.jersey.api.client.config.DefaultClientConfig;
+import com.sun.jersey.client.urlconnection.HTTPSProperties;
+
+/**
+ * This is a generic REST Client builder with flexible security validation. Sometimes it's nice to
+ * be able to disable server chain cert validation and hostname validation to work-around lab
+ * issues, but at the same time be able to provide complete validation with client cert + hostname +
+ * server cert chain validation. I used the ModelLoader REST client as a base and merged in the TSUI
+ * client I wrote which also validates the server hostname and server certificate chain.
+ */
+public class RestClientBuilder {
+
+ public static final boolean DEFAULT_VALIDATE_SERVER_HOST = false;
+ public static final boolean DEFAULT_VALIDATE_CERT_CHAIN = false;
+ public static final String DEFAULT_CLIENT_CERT_FILENAME = null;
+ public static final String DEFAULT_CERT_PASSWORD = null;
+ public static final String DEFAULT_TRUST_STORE_FILENAME = null;
+ public static final int DEFAULT_CONNECT_TIMEOUT_MS = 60000;
+ public static final int DEFAULT_READ_TIMEOUT_MS = 60000;
+ public static final RestAuthenticationMode DEFAULT_AUTH_MODE = RestAuthenticationMode.SSL_CERT;
+ public static final String DEFAULT_BASIC_AUTH_USERNAME = "";
+ public static final String DEFAULT_BASIC_AUTH_PASSWORD = "";
+
+ private static final String SSL_PROTOCOL = "TLS";
+ private static final String KEYSTORE_ALGORITHM = "SunX509";
+ private static final String KEYSTORE_TYPE = "PKCS12";
+ private static final String TRUST_STORE_PROPERTY = "javax.net.ssl.trustStore";
+
+ private boolean validateServerHostname;
+ private boolean validateServerCertChain;
+ private String clientCertFileName;
+ private String clientCertPassword;
+ private String truststoreFilename;
+ private int connectTimeoutInMs;
+ private int readTimeoutInMs;
+ private RestAuthenticationMode authenticationMode;
+ private String basicAuthUsername;
+ private String basicAuthPassword;
+
+ /**
+ * Rest Client Builder.
+ */
+ public RestClientBuilder() {
+ validateServerHostname = DEFAULT_VALIDATE_SERVER_HOST;
+ validateServerCertChain = DEFAULT_VALIDATE_CERT_CHAIN;
+ clientCertFileName = DEFAULT_CLIENT_CERT_FILENAME;
+ clientCertPassword = DEFAULT_CERT_PASSWORD;
+ truststoreFilename = DEFAULT_TRUST_STORE_FILENAME;
+ connectTimeoutInMs = DEFAULT_CONNECT_TIMEOUT_MS;
+ readTimeoutInMs = DEFAULT_READ_TIMEOUT_MS;
+ authenticationMode = DEFAULT_AUTH_MODE;
+ basicAuthUsername = DEFAULT_BASIC_AUTH_USERNAME;
+ basicAuthPassword = DEFAULT_BASIC_AUTH_PASSWORD;
+ }
+
+ public boolean isValidateServerHostname() {
+ return validateServerHostname;
+ }
+
+ public void setValidateServerHostname(boolean validateServerHostname) {
+ this.validateServerHostname = validateServerHostname;
+ }
+
+ public boolean isValidateServerCertChain() {
+ return validateServerCertChain;
+ }
+
+ public void setValidateServerCertChain(boolean validateServerCertChain) {
+ this.validateServerCertChain = validateServerCertChain;
+ }
+
+ public String getClientCertFileName() {
+ return clientCertFileName;
+ }
+
+ public void setClientCertFileName(String clientCertFileName) {
+ this.clientCertFileName = clientCertFileName;
+ }
+
+ public String getClientCertPassword() {
+ return clientCertPassword;
+ }
+
+ public void setClientCertPassword(String clientCertPassword) {
+ this.clientCertPassword = clientCertPassword;
+ }
+
+ public String getTruststoreFilename() {
+ return truststoreFilename;
+ }
+
+ public void setTruststoreFilename(String truststoreFilename) {
+ this.truststoreFilename = truststoreFilename;
+ }
+
+ public int getConnectTimeoutInMs() {
+ return connectTimeoutInMs;
+ }
+
+ public void setConnectTimeoutInMs(int connectTimeoutInMs) {
+ this.connectTimeoutInMs = connectTimeoutInMs;
+ }
+
+ public int getReadTimeoutInMs() {
+ return readTimeoutInMs;
+ }
+
+ public void setReadTimeoutInMs(int readTimeoutInMs) {
+ this.readTimeoutInMs = readTimeoutInMs;
+ }
+
+
+
+ public RestAuthenticationMode getAuthenticationMode() {
+ return authenticationMode;
+ }
+
+ public void setAuthenticationMode(RestAuthenticationMode authenticationMode) {
+ this.authenticationMode = authenticationMode;
+ }
+
+ public String getBasicAuthUsername() {
+ return basicAuthUsername;
+ }
+
+ public void setBasicAuthUsername(String basicAuthUsername) {
+ this.basicAuthUsername = basicAuthUsername;
+ }
+
+ public String getBasicAuthPassword() {
+ return basicAuthPassword;
+ }
+
+ public void setBasicAuthPassword(String basicAuthPassword) {
+ this.basicAuthPassword = basicAuthPassword;
+ }
+
+ /**
+ * Returns Client configured for SSL
+ */
+ public Client getClient() throws Exception {
+
+ switch (authenticationMode) {
+ case SSL_BASIC:
+ case SSL_CERT:
+ return getClient(true);
+
+ default:
+ // return basic non-authenticating HTTP client
+ return getClient(false);
+ }
+
+ }
+
+ protected void setupSecureSocketLayerClientConfig(ClientConfig clientConfig) throws Exception {
+ // Check to see if we need to perform proper validation of
+ // the certificate chains.
+ TrustManager[] trustAllCerts = null;
+ if (validateServerCertChain) {
+ if (truststoreFilename != null) {
+ System.setProperty(TRUST_STORE_PROPERTY, truststoreFilename);
+ } else {
+ throw new IllegalArgumentException("Trust store filename must be set!");
+ }
+
+ } else {
+
+ // We aren't validating certificates, so create a trust manager that does
+ // not validate certificate chains.
+ trustAllCerts = new TrustManager[] {new X509TrustManager() {
+ public X509Certificate[] getAcceptedIssuers() {
+ return null;
+ }
+
+ public void checkClientTrusted(X509Certificate[] certs, String authType) {}
+
+ public void checkServerTrusted(X509Certificate[] certs, String authType) {}
+ }};
+ }
+
+ // Set up the SSL context, keystore, etc. to use for our connection
+ // to the AAI.
+ SSLContext ctx = SSLContext.getInstance(SSL_PROTOCOL);
+ KeyManagerFactory kmf = KeyManagerFactory.getInstance(KEYSTORE_ALGORITHM);
+ KeyStore ks = KeyStore.getInstance(KEYSTORE_TYPE);
+
+ char[] pwd = null;
+ if (clientCertPassword != null) {
+ pwd = clientCertPassword.toCharArray();
+ }
+
+ if (clientCertFileName != null) {
+ FileInputStream fin = new FileInputStream(clientCertFileName);
+
+ // Load the keystore and initialize the key manager factory.
+ ks.load(fin, pwd);
+ kmf.init(ks, pwd);
+
+ ctx.init(kmf.getKeyManagers(), trustAllCerts, null);
+ } else {
+ ctx.init(null, trustAllCerts, null);
+ }
+
+ // Are we performing validation of the server host name?
+ if (validateServerHostname) {
+ clientConfig.getProperties().put(HTTPSProperties.PROPERTY_HTTPS_PROPERTIES,
+ new HTTPSProperties(null, ctx));
+
+ } else {
+ clientConfig.getProperties().put(HTTPSProperties.PROPERTY_HTTPS_PROPERTIES,
+ new HTTPSProperties(new HostnameVerifier() {
+ @Override
+ public boolean verify(String str, SSLSession sslSession) {
+ return true;
+ }
+ }, ctx));
+ }
+ }
+
+
+ /**
+ * Returns client instance
+ *
+ * @param useSsl - used to configure the client with an ssl-context or just plain http
+ */
+ protected Client getClient(boolean useSsl) throws Exception {
+
+ ClientConfig clientConfig = new DefaultClientConfig();
+
+ if (useSsl) {
+ setupSecureSocketLayerClientConfig(clientConfig);
+ }
+
+ // Finally, create and initialize our client...
+ Client client = null;
+ client = Client.create(clientConfig);
+ client.setConnectTimeout(connectTimeoutInMs);
+ client.setReadTimeout(readTimeoutInMs);
+
+ // ...and return it to the caller.
+ return client;
+ }
+
+ public String getBasicAuthenticationCredentials() {
+
+ String usernameAndPassword = getBasicAuthUsername() + ":" + getBasicAuthPassword();
+ return "Basic " + java.util.Base64.getEncoder().encodeToString(usernameAndPassword.getBytes());
+ }
+
+ /*
+ * Added a little bit of logic to obfuscate passwords that could be logged out
+ * (non-Javadoc)
+ * @see java.lang.Object#toString()
+ */
+ @Override
+ public String toString() {
+ return "RestClientBuilder [validateServerHostname=" + validateServerHostname
+ + ", validateServerCertChain=" + validateServerCertChain + ", "
+ + (clientCertFileName != null ? "clientCertFileName=" + clientCertFileName + ", " : "")
+ + (clientCertPassword != null
+ ? "clientCertPassword="
+ + java.util.Base64.getEncoder().encodeToString(clientCertPassword.getBytes()) + ", "
+ : "")
+ + (truststoreFilename != null ? "truststoreFilename=" + truststoreFilename + ", " : "")
+ + "connectTimeoutInMs=" + connectTimeoutInMs + ", readTimeoutInMs=" + readTimeoutInMs + ", "
+ + (authenticationMode != null ? "authenticationMode=" + authenticationMode + ", " : "")
+ + (basicAuthUsername != null ? "basicAuthUsername=" + basicAuthUsername + ", " : "")
+ + (basicAuthPassword != null ? "basicAuthPassword="
+ + java.util.Base64.getEncoder().encodeToString(basicAuthPassword.getBytes()) : "")
+ + "]";
+ }
+
+}