package se.leap.leapclient; import java.io.IOException; import java.math.BigInteger; import java.security.NoSuchAlgorithmException; import java.util.List; import java.net.MalformedURLException; import java.net.URL; import java.net.UnknownHostException; import java.util.Scanner; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; 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.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.CORRECTLY_DOWNLOADED_JSON_FILES, 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); } } private boolean downloadJsonFiles(Bundle task) { String cert_url = (String) task.get(ConfigHelper.cert_key); String eip_service_json_url = (String) task.get(ConfigHelper.eip_service_key); try { String cert_string = getStringFromProvider(cert_url); JSONObject cert_json = new JSONObject("{ \"certificate\" : \"" + cert_string + "\"}"); ConfigHelper.saveSharedPref(ConfigHelper.cert_key, cert_json); JSONObject eip_service_json = getJSONFromProvider(eip_service_json_url); ConfigHelper.saveSharedPref(ConfigHelper.eip_service_key, eip_service_json); return true; } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); return false; } catch (JSONException e) { ConfigHelper.rescueJSONException(e); return false; } catch(Exception e) { e.printStackTrace(); 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.srp_server_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.srp_server_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(); salt = saltAndB.getString("salt"); 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)); byte[] Bbytes = new BigInteger(saltAndB.getString("B"), 16).toByteArray(); byte[] M1 = client.response(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 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; 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); } catch (IOException e) { // It could happen that an https site used a certificate not trusted. provider_json = downloadNewProviderDotJsonWithoutCert(provider_json_url); } 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, ConfigHelper.openFileInputStream(filename), custom)); return true; } } private boolean downloadJsonFilesBundleExtra(Bundle task) { //TODO task only contains provider main url -> we need to infer cert_url, provider_name and eip_service_json_url from that. String provider_main_url = (String) task.get(ConfigHelper.provider_main_url); String provider_name = ConfigHelper.extractProviderName(provider_main_url); String cert_url = (String) task.get(ConfigHelper.cert_key); String eip_service_json_url = (String) task.get(ConfigHelper.eip_service_key); try { //JSONObject provider_json = new JSONObject("{ \"provider\" : \"" + provider_name + "\"}"); //ConfigHelper.saveSharedPref(ConfigHelper.provider_key, provider_json); /*String cert_string = getStringFromProvider(cert_url); JSONObject cert_json = new JSONObject("{ \"certificate\" : \"" + cert_string + "\"}"); ConfigHelper.saveSharedPref(ConfigHelper.cert_key, cert_json); ConfigHelper.addTrustedCertificate(provider_name, cert_string);*/ URL cacert = new URL(cert_url); ConfigHelper.addTrustedCertificate(provider_name, cacert.openStream()); JSONObject eip_service_json = getJSONFromProvider(eip_service_json_url); ConfigHelper.saveSharedPref(ConfigHelper.eip_service_key, eip_service_json); return true; } catch (IOException e) { //TODO It could happen when the url is not valid. e.printStackTrace(); return false; } catch (JSONException e) { ConfigHelper.rescueJSONException(e); return false; } catch(Exception e) { e.printStackTrace(); return false; } } private JSONObject downloadNewProviderDotJsonWithoutCert( String provider_json_url) { JSONObject provider_json = null; try { URL provider_url = new URL(provider_json_url); String provider_json_string = new Scanner(provider_url.openStream()).useDelimiter("\\A").next(); provider_json = new JSONObject(provider_json_string); } catch (MalformedURLException e1) { e1.printStackTrace(); } catch (UnknownHostException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } catch (JSONException e1) { e1.printStackTrace(); } return provider_json; } private String guessURL(String provider_main_url) { return provider_main_url + "/provider.json"; } private String getStringFromProvider(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) throws IOException, JSONException { String json_file_content = getStringFromProvider(json_url); return new JSONObject(json_file_content); } }