package se.leap.leapclient; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.math.BigInteger; import java.security.KeyManagementException; import java.security.KeyStore; import java.security.KeyStoreException; import java.security.NoSuchAlgorithmException; import java.security.cert.CertificateException; import java.security.cert.CertificateFactory; import java.security.cert.X509Certificate; import java.util.List; import java.net.MalformedURLException; import java.net.URL; import java.util.Scanner; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.HttpsURLConnection; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSession; import javax.net.ssl.TrustManagerFactory; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.methods.HttpDelete; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.client.methods.HttpPut; import org.apache.http.client.protocol.ClientContext; import org.apache.http.cookie.Cookie; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.protocol.BasicHttpContext; import org.apache.http.protocol.HttpContext; import org.jboss.security.Util; import org.jboss.security.srp.SRPParameters; import org.json.JSONException; import org.json.JSONObject; import se.leap.leapclient.ProviderListContent.ProviderItem; import android.app.IntentService; import android.content.Intent; import android.os.Bundle; import android.os.ResultReceiver; import android.util.Base64; import android.util.Log; public class ProviderAPI extends IntentService { public ProviderAPI() { super("ProviderAPI"); Log.v("ClassName", "Provider API"); } @Override protected void onHandleIntent(Intent task_for) { final ResultReceiver receiver = task_for.getParcelableExtra("receiver"); Bundle task; if((task = task_for.getBundleExtra(ConfigHelper.downloadJsonFilesBundleExtra)) != null) { if(!downloadJsonFiles(task)) receiver.send(ConfigHelper.INCORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); else receiver.send(ConfigHelper.CORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); } else if ((task = task_for.getBundleExtra(ConfigHelper.downloadNewProviderDotJSON)) != null) { if(downloadNewProviderDotJSON(task)) receiver.send(ConfigHelper.CUSTOM_PROVIDER_ADDED, Bundle.EMPTY); else receiver.send(ConfigHelper.INCORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); } else if ((task = task_for.getBundleExtra(ConfigHelper.srpAuth)) != null) { if(authenticateBySRP(task)) receiver.send(ConfigHelper.SRP_AUTHENTICATION_SUCCESSFUL, Bundle.EMPTY); else receiver.send(ConfigHelper.SRP_AUTHENTICATION_FAILED, Bundle.EMPTY); } else if ((task = task_for.getBundleExtra(ConfigHelper.logOut)) != null) { if(logOut(task)) receiver.send(ConfigHelper.LOGOUT_SUCCESSFUL, Bundle.EMPTY); else receiver.send(ConfigHelper.LOGOUT_FAILED, Bundle.EMPTY); } } private boolean downloadJsonFiles(Bundle task) { String provider_name = task.getString(ConfigHelper.provider_key); String cert_url = task.getString(ConfigHelper.cert_key); String eip_service_json_url = task.getString(ConfigHelper.eip_service_key); boolean danger_on = task.getBoolean(ConfigHelper.danger_on); try { String cert_string = getStringFromProvider(cert_url, danger_on); ConfigHelper.addTrustedCertificate(provider_name, cert_string); JSONObject cert_json = new JSONObject("{ \"certificate\" : \"" + cert_string + "\"}"); ConfigHelper.saveSharedPref(ConfigHelper.cert_key, cert_json); JSONObject eip_service_json = getJSONFromProvider(eip_service_json_url, danger_on); ConfigHelper.saveSharedPref(ConfigHelper.eip_service_key, eip_service_json); return true; } catch (JSONException e) { ConfigHelper.rescueJSONException(e); return false; } } private boolean registerWithSRP(Bundle task) { String username = (String) task.get(ConfigHelper.username_key); String password = (String) task.get(ConfigHelper.password_key); String authentication_server = (String) task.get(ConfigHelper.api_url_key); BigInteger ng_1024 = new BigInteger(ConfigHelper.NG_1024, 16); BigInteger salt = ng_1024.probablePrime(1024, null); byte[] salt_in_bytes = salt.toByteArray(); return false; } private boolean authenticateBySRP(Bundle task) { String username = (String) task.get(ConfigHelper.username_key); String password = (String) task.get(ConfigHelper.password_key); String authentication_server = (String) task.get(ConfigHelper.api_url_key); String salt = "abcd"; SRPParameters params = new SRPParameters(new BigInteger(ConfigHelper.NG_1024, 16).toByteArray(), new BigInteger("2").toByteArray(), new BigInteger(salt, 16).toByteArray(), "SHA-256"); //SRPClientSession client = new SRPClientSession(username, password.toCharArray(), params); LeapSRPSession client = new LeapSRPSession(username, password, params); byte[] A = client.exponential(); try { JSONObject saltAndB = sendAToSRPServer(authentication_server, username, new BigInteger(1, A).toString(16)); if(saltAndB.length() > 0) { /*byte[] B = saltAndB.getString("B").getBytes(); params = new SRPParameters(new BigInteger(ConfigHelper.NG_1024, 16).toByteArray(), new BigInteger("2").toByteArray(), new BigInteger(salt, 16).toByteArray(), "SHA-256"); client = new LeapSRPSession(username, password, params); A = client.exponential(); saltAndB = sendAToSRPServer(authentication_server, username, new BigInteger(1, A).toString(16));*/ salt = saltAndB.getString("salt"); byte[] Bbytes = new BigInteger(saltAndB.getString("B"), 16).toByteArray(); byte[] M1 = client.response(new BigInteger(salt, 16).toByteArray(), Bbytes); byte[] M2 = sendM1ToSRPServer(authentication_server, username, M1); if( client.verify(M2) == false ) //throw new SecurityException("Failed to validate server reply: M2 = " + new BigInteger(1, M2).toString(16)); return false; return true; } else return false; } catch (ClientProtocolException e1) { // TODO Auto-generated catch block e1.printStackTrace(); return false; } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); return false; } catch (JSONException e1) { // TODO Auto-generated catch block e1.printStackTrace(); return false; } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); return false; } } private JSONObject sendAToSRPServer(String server_url, String username, String clientA) throws ClientProtocolException, IOException, JSONException { DefaultHttpClient client = LeapHttpClient.getInstance(getApplicationContext()); String parameter_chain = "A" + "=" + clientA + "&" + "login" + "=" + username; HttpPost post = new HttpPost(server_url + "/sessions.json" + "?" + parameter_chain); HttpResponse getResponse = client.execute(post); HttpEntity responseEntity = getResponse.getEntity(); String plain_response = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next(); JSONObject json_response = new JSONObject(plain_response); if(!json_response.isNull("errors") || json_response.has("errors")) { return new JSONObject(); } List cookies = client.getCookieStore().getCookies(); if(!cookies.isEmpty()) { String session_id = cookies.get(0).getValue(); } return json_response; } private byte[] sendM1ToSRPServer(String server_url, String username, byte[] m1) throws ClientProtocolException, IOException, JSONException { DefaultHttpClient client = LeapHttpClient.getInstance(getApplicationContext()); String parameter_chain = "client_auth" + "=" + new BigInteger(1, Util.trim(m1)).toString(16); HttpPut put = new HttpPut(server_url + "/sessions/" + username +".json" + "?" + parameter_chain); HttpContext localContext = new BasicHttpContext(); localContext.setAttribute(ClientContext.COOKIE_STORE, client.getCookieStore()); HttpResponse getResponse = client.execute(put, localContext); HttpEntity responseEntity = getResponse.getEntity(); String plain_response = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next(); JSONObject json_response = new JSONObject(plain_response); if(!json_response.isNull("errors") || json_response.has("errors")) { return new byte[0]; } byte[] M2_not_trimmed = new BigInteger(json_response.getString("M2"), 16).toByteArray(); return Util.trim(M2_not_trimmed); //return M2_not_trimmed; } private boolean downloadNewProviderDotJSON(Bundle task) { boolean custom = true; boolean danger_on = task.getBoolean(ConfigHelper.danger_on); String provider_main_url = (String) task.get(ConfigHelper.provider_main_url); String provider_name = provider_main_url.replaceFirst("http[s]?://", "").replaceFirst("\\/", "_"); String provider_json_url = guessURL(provider_main_url); JSONObject provider_json = null; try { provider_json = getJSONFromProvider(provider_json_url, danger_on); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); return false; } if(provider_json == null) { return false; } else { String filename = provider_name + "_provider.json".replaceFirst("__", "_"); ConfigHelper.saveFile(filename, provider_json.toString()); ConfigHelper.saveSharedPref(ConfigHelper.provider_key, provider_json); ProviderListContent.addItem(new ProviderItem(provider_name, provider_json_url, ConfigHelper.openFileInputStream(filename), custom, danger_on)); return true; } } private String getStringFromProviderWithoutValidate( URL provider_json_url) { String json_string = ""; HostnameVerifier hostnameVerifier = new HostnameVerifier() { @Override public boolean verify(String hostname, SSLSession session) { return true; } }; // Tell the URLConnection to use our HostnameVerifier try { HttpsURLConnection urlConnection = (HttpsURLConnection)provider_json_url.openConnection(); urlConnection.setHostnameVerifier(hostnameVerifier); json_string = new Scanner(urlConnection.getInputStream()).useDelimiter("\\A").next(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block json_string = getStringFromProviderWithCACertAdded(provider_json_url); //e.printStackTrace(); } return json_string; } private String guessURL(String provider_main_url) { return provider_main_url + "/provider.json"; } private String getStringFromProvider(String string_url, boolean danger_on) { String json_file_content = ""; URL provider_url = null; try { provider_url = new URL(string_url); json_file_content = new Scanner(provider_url.openStream()).useDelimiter("\\A").next(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO SSLHandshakeException // This means that we have not added ca.crt to the trusted certificates. if(provider_url != null && danger_on) { json_file_content = getStringFromProviderWithoutValidate(provider_url); } //json_file_content = downloadStringFromProviderWithCACertAdded(string_url); e.printStackTrace(); } return json_file_content; } private String getStringFromProviderWithCACertAdded(URL url) { String json_file_content = ""; // Load CAs from an InputStream // (could be from a resource or ByteArrayInputStream or ...) CertificateFactory cf; try { cf = CertificateFactory.getInstance("X.509"); String cert_string = ConfigHelper.getStringFromSharedPref(ConfigHelper.cert_key); cert_string = cert_string.replaceFirst("-----BEGIN CERTIFICATE-----", "").replaceFirst("-----END CERTIFICATE-----", "").trim(); byte[] cert_bytes = Base64.decode(cert_string, Base64.DEFAULT); InputStream caInput = new ByteArrayInputStream(cert_bytes); java.security.cert.Certificate ca; try { ca = cf.generateCertificate(caInput); System.out.println("ca=" + ((X509Certificate) ca).getSubjectDN()); } finally { caInput.close(); } // Create a KeyStore containing our trusted CAs String keyStoreType = KeyStore.getDefaultType(); KeyStore keyStore = KeyStore.getInstance(keyStoreType); keyStore.load(null, null); keyStore.setCertificateEntry("ca", ca); // Create a TrustManager that trusts the CAs in our KeyStore String tmfAlgorithm = TrustManagerFactory.getDefaultAlgorithm(); TrustManagerFactory tmf = TrustManagerFactory.getInstance(tmfAlgorithm); tmf.init(keyStore); // Create an SSLContext that uses our TrustManager SSLContext context = SSLContext.getInstance("TLS"); context.init(null, tmf.getTrustManagers(), null); // Tell the URLConnection to use a SocketFactory from our SSLContext HttpsURLConnection urlConnection = (HttpsURLConnection)url.openConnection(); urlConnection.setSSLSocketFactory(context.getSocketFactory()); json_file_content = new Scanner(urlConnection.getInputStream()).useDelimiter("\\A").next(); } catch (CertificateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (KeyStoreException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (NoSuchAlgorithmException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (KeyManagementException e) { // TODO Auto-generated catch block e.printStackTrace(); } return json_file_content; } private String getStringFromProvider_2(String string_url) throws IOException { String json_file_content = ""; DefaultHttpClient client = LeapHttpClient.getInstance(getApplicationContext()); HttpGet get = new HttpGet(string_url); // Execute the GET call and obtain the response HttpResponse getResponse = client.execute(get); HttpEntity responseEntity = getResponse.getEntity(); json_file_content = new Scanner(responseEntity.getContent()).useDelimiter("\\A").next(); return json_file_content; } private JSONObject getJSONFromProvider(String json_url, boolean danger_on) throws JSONException { String json_file_content = getStringFromProvider(json_url, danger_on); return new JSONObject(json_file_content); } private boolean logOut(Bundle task) { DefaultHttpClient client = LeapHttpClient.getInstance(getApplicationContext()); int session_id_index = 0; //String delete_url = task.getString(ConfigHelper.srp_server_url_key) + "/sessions/" + client.getCookieStore().getCookies().get(0).getValue(); String delete_url = task.getString(ConfigHelper.api_url_key) + "/logout" + "?authenticity_token=" + client.getCookieStore().getCookies().get(session_id_index).getValue(); HttpDelete delete = new HttpDelete(delete_url); try { HttpResponse getResponse = client.execute(delete); HttpEntity responseEntity = getResponse.getEntity(); responseEntity.consumeContent(); } catch (ClientProtocolException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return true; } }