ONOS-3810 augmenting Rest southbound protocol and provider for https and password based auth

Change-Id: I3e5f07ba6a751bc8a7637373c037a1910181f9ab
diff --git a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
index 76f5abd..18c376b 100644
--- a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
+++ b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProvider.java
@@ -49,9 +49,14 @@
 import org.onosproject.protocol.rest.RestSBDevice;
 import org.slf4j.Logger;
 
+import javax.net.ssl.HttpsURLConnection;
 import java.io.IOException;
 import java.net.HttpURLConnection;
 import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -71,6 +76,10 @@
     private static final String PROVIDER = "org.onosproject.provider.rest.device";
     private static final String IPADDRESS = "ipaddress";
     private static final int TEST_CONNECT_TIMEOUT = 1000;
+    private static final String HTTPS = "https";
+    private static final String AUTHORIZATION_PROPERTY = "authorization";
+    private static final String BASIC_AUTH_PREFIX = "Basic ";
+    private static final String URL_SEPARATOR = "://";
     private final Logger log = getLogger(getClass());
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -202,7 +211,7 @@
         } catch (ConfigException e) {
             log.error("Configuration error {}", e);
         }
-        log.info("REST Devices {}", controller.getDevices());
+        log.debug("REST Devices {}", controller.getDevices());
         controller.getDevices().keySet().forEach(deviceId -> {
             DriverHandler h = driverService.createHandler(deviceId);
             PortDiscovery portConfig = h.behaviour(PortDiscovery.class);
@@ -216,14 +225,39 @@
 
     private boolean testDeviceConnection(RestSBDevice device) {
         try {
-            URL url = new URL(device.protocol(), device.ip().toString(), device.port(), "/");
-            HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
+            URL url;
+            if (device.url() == null) {
+                url = new URL(device.protocol(), device.ip().toString(), device.port(), "");
+            } else {
+                url = new URL(device.protocol() + URL_SEPARATOR + device.url());
+            }
+            HttpURLConnection urlConn;
+            if (device.protocol().equals(HTTPS)) {
+                //FIXME this method provides no security accepting all SSL certs.
+                RestDeviceProviderUtilities.enableSslCert();
+
+                urlConn = (HttpsURLConnection) url.openConnection();
+            } else {
+                urlConn = (HttpURLConnection) url.openConnection();
+            }
+            if (device.password() != null) {
+                String userPassword = device.name() + ":" + device.password();
+                String basicAuth = Base64.getEncoder()
+                        .encodeToString(userPassword.getBytes(StandardCharsets.UTF_8));
+                urlConn.setRequestProperty(AUTHORIZATION_PROPERTY, BASIC_AUTH_PREFIX + basicAuth);
+            }
             urlConn.setConnectTimeout(TEST_CONNECT_TIMEOUT);
-            boolean open = urlConn.getResponseCode() == (HttpURLConnection.HTTP_OK);
+            boolean open = urlConn.getResponseCode() == (HttpsURLConnection.HTTP_OK);
+            if (!open) {
+                log.error("Device {} not accessibile, response code {} ", device,
+                          urlConn.getResponseCode());
+            }
             urlConn.disconnect();
             return open;
-        } catch (IOException e) {
-            log.error("Device {} not reachable, error creating HTTP connection", device, e);
+
+        } catch (IOException | NoSuchAlgorithmException | KeyManagementException e) {
+            log.error("Device {} not reachable, error creating {} connection", device,
+                      device.protocol(), e);
         }
         return false;
     }
diff --git a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProviderUtilities.java b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProviderUtilities.java
new file mode 100644
index 0000000..53c97e1
--- /dev/null
+++ b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestDeviceProviderUtilities.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2016 Open Networking Laboratory
+ *
+ * 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.
+ */
+
+package org.onosproject.provider.rest.device.impl;
+
+import javax.net.ssl.HttpsURLConnection;
+import javax.net.ssl.KeyManager;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+import java.security.KeyManagementException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.cert.CertificateException;
+import java.security.cert.X509Certificate;
+
+/**
+ * Utilities class for RestDevice provider.
+ */
+final class RestDeviceProviderUtilities {
+
+    private static final String TLS = "TLS";
+
+    //disable construction.
+    private RestDeviceProviderUtilities(){}
+
+    /**
+     * Method that bypasses every SSL certificate verification and accepts every
+     * connection with any SSL protected device that ONOS has an interaction with.
+     * Needs addressing for secutirty purposes.
+     *
+     * @throws NoSuchAlgorithmException
+     * @throws KeyManagementException
+     */
+    //FIXME redo for security purposes.
+    protected static void enableSslCert() throws NoSuchAlgorithmException, KeyManagementException {
+        SSLContext ctx = SSLContext.getInstance(TLS);
+        ctx.init(new KeyManager[0], new TrustManager[]{new DefaultTrustManager()}, new SecureRandom());
+        SSLContext.setDefault(ctx);
+        HttpsURLConnection.setDefaultHostnameVerifier((hostname, session) -> {
+            //FIXME better way to do this.
+            return true;
+        });
+    }
+
+    //FIXME this accepts every connection
+    private static class DefaultTrustManager implements X509TrustManager {
+
+        @Override
+        public void checkClientTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
+        }
+
+        @Override
+        public void checkServerTrusted(X509Certificate[] arg0, String arg1) throws CertificateException {
+        }
+
+        @Override
+        public X509Certificate[] getAcceptedIssuers() {
+            return null;
+        }
+    }
+}
diff --git a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestProviderConfig.java b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestProviderConfig.java
index 2056dce..3671922 100644
--- a/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestProviderConfig.java
+++ b/providers/rest/device/src/main/java/org/onosproject/provider/rest/device/impl/RestProviderConfig.java
@@ -42,6 +42,7 @@
     private static final String NAME = "name";
     private static final String PASSWORD = "password";
     private static final String PROTOCOL = "protocol";
+    private static final String URL = "url";
 
     public Set<RestSBDevice> getDevicesAddresses() throws ConfigException {
         Set<RestSBDevice> devicesAddresses = Sets.newHashSet();
@@ -54,8 +55,10 @@
                 String name = node.path(NAME).asText();
                 String password = node.path(PASSWORD).asText();
                 String protocol = node.path(PROTOCOL).asText();
+                String url = node.path(URL).asText();
                 devicesAddresses.add(new DefaultRestSBDevice(ipAddr, port, name,
-                                                             password, protocol, false));
+                                                             password, protocol,
+                                                             url, false));
 
             }
         } catch (IllegalArgumentException e) {