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authorParménides GV <parmegv@sdf.org>2015-06-16 11:28:05 +0200
committerParménides GV <parmegv@sdf.org>2015-06-16 11:28:05 +0200
commit66c79953db6876ec17a7ebf50dc4fd07d24fae37 (patch)
tree67075abe6ea28f7fc7213f654b86464b13507058 /app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java
parent1f41fec6765e49838141ad29151713c7ac3dd17c (diff)
parente533cf6939e3ea4233aa8a82812f8ce5fcb565ca (diff)
Merge branch 'develop'0.9.4
Diffstat (limited to 'app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java')
-rw-r--r--app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java1012
1 files changed, 1012 insertions, 0 deletions
diff --git a/app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java b/app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java
new file mode 100644
index 00000000..2d7e13fe
--- /dev/null
+++ b/app/src/insecure/java/se/leap/bitmaskclient/ProviderAPI.java
@@ -0,0 +1,1012 @@
+/**
+ * Copyright (c) 2013 LEAP Encryption Access Project and contributers
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package se.leap.bitmaskclient;
+
+import android.app.*;
+import android.content.*;
+import android.content.res.*;
+import android.os.*;
+import android.util.*;
+
+import org.apache.http.client.*;
+import org.json.*;
+import org.thoughtcrime.ssl.pinning.util.*;
+
+import java.io.*;
+import java.math.*;
+import java.net.*;
+import java.security.*;
+import java.security.cert.*;
+import java.security.interfaces.*;
+import java.util.*;
+
+import javax.net.ssl.*;
+
+import se.leap.bitmaskclient.ProviderListContent.*;
+import se.leap.bitmaskclient.eip.*;
+import se.leap.bitmaskclient.userstatus.SessionDialog;
+import se.leap.bitmaskclient.userstatus.User;
+import se.leap.bitmaskclient.userstatus.UserStatus;
+
+/**
+ * Implements HTTP api methods used to manage communications with the provider server.
+ * <p/>
+ * It's an IntentService because it downloads data from the Internet, so it operates in the background.
+ *
+ * @author parmegv
+ * @author MeanderingCode
+ */
+public class ProviderAPI extends IntentService {
+
+ final public static String
+ TAG = ProviderAPI.class.getSimpleName(),
+ SET_UP_PROVIDER = "setUpProvider",
+ DOWNLOAD_NEW_PROVIDER_DOTJSON = "downloadNewProviderDotJSON",
+ SIGN_UP = "srpRegister",
+ LOG_IN = "srpAuth",
+ LOG_OUT = "logOut",
+ DOWNLOAD_CERTIFICATE = "downloadUserAuthedCertificate",
+ PARAMETERS = "parameters",
+ RESULT_KEY = "result",
+ RECEIVER_KEY = "receiver",
+ ERRORS = "errors",
+ UPDATE_PROGRESSBAR = "update_progressbar",
+ CURRENT_PROGRESS = "current_progress",
+ DOWNLOAD_EIP_SERVICE = TAG + ".DOWNLOAD_EIP_SERVICE";
+
+ final public static int
+ SUCCESSFUL_LOGIN = 3,
+ FAILED_LOGIN = 4,
+ SUCCESSFUL_SIGNUP = 5,
+ FAILED_SIGNUP = 6,
+ SUCCESSFUL_LOGOUT = 7,
+ LOGOUT_FAILED = 8,
+ CORRECTLY_DOWNLOADED_CERTIFICATE = 9,
+ INCORRECTLY_DOWNLOADED_CERTIFICATE = 10,
+ PROVIDER_OK = 11,
+ PROVIDER_NOK = 12,
+ CORRECTLY_DOWNLOADED_EIP_SERVICE = 13,
+ INCORRECTLY_DOWNLOADED_EIP_SERVICE = 14;
+
+ private static boolean
+ CA_CERT_DOWNLOADED = false,
+ PROVIDER_JSON_DOWNLOADED = false,
+ EIP_SERVICE_JSON_DOWNLOADED = false;
+
+ private static String last_provider_main_url;
+ private static boolean last_danger_on = false;
+ private static boolean go_ahead = true;
+ private static SharedPreferences preferences;
+ private static String provider_api_url;
+ private static String provider_ca_cert_fingerprint;
+ private Resources resources;
+
+ public static void stop() {
+ go_ahead = false;
+ }
+
+ public ProviderAPI() {
+ super(TAG);
+ }
+
+ @Override
+ public void onCreate() {
+ super.onCreate();
+
+
+ preferences = getSharedPreferences(Dashboard.SHARED_PREFERENCES, MODE_PRIVATE);
+ resources = getResources();
+ CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ORIGINAL_SERVER));
+ }
+
+ public static String lastProviderMainUrl() {
+ return last_provider_main_url;
+ }
+
+ public static boolean lastDangerOn() {
+ return last_danger_on;
+ }
+
+ private String formatErrorMessage(final int toast_string_id) {
+ return "{ \"" + ERRORS + "\" : \"" + getResources().getString(toast_string_id) + "\" }";
+ }
+
+ @Override
+ protected void onHandleIntent(Intent command) {
+ final ResultReceiver receiver = command.getParcelableExtra(RECEIVER_KEY);
+ String action = command.getAction();
+ Bundle parameters = command.getBundleExtra(PARAMETERS);
+ if (provider_api_url == null && preferences.contains(Provider.KEY)) {
+ try {
+ JSONObject provider_json = new JSONObject(preferences.getString(Provider.KEY, "no provider"));
+ provider_api_url = provider_json.getString(Provider.API_URL) + "/" + provider_json.getString(Provider.API_VERSION);
+ go_ahead = true;
+ } catch (JSONException e) {
+ go_ahead = false;
+ }
+ }
+
+ if (action.equalsIgnoreCase(SET_UP_PROVIDER)) {
+ Bundle result = setUpProvider(parameters);
+ if (result.getBoolean(RESULT_KEY)) {
+ receiver.send(PROVIDER_OK, result);
+ } else {
+ receiver.send(PROVIDER_NOK, result);
+ }
+ } else if (action.equalsIgnoreCase(SIGN_UP)) {
+ UserStatus.updateStatus(UserStatus.SessionStatus.SIGNING_UP, resources);
+ Bundle result = tryToRegister(parameters);
+ if (result.getBoolean(RESULT_KEY)) {
+ receiver.send(SUCCESSFUL_SIGNUP, result);
+ } else {
+ receiver.send(FAILED_SIGNUP, result);
+ }
+ } else if (action.equalsIgnoreCase(LOG_IN)) {
+ UserStatus.updateStatus(UserStatus.SessionStatus.LOGGING_IN, resources);
+ Bundle result = tryToAuthenticate(parameters);
+ if (result.getBoolean(RESULT_KEY)) {
+ receiver.send(SUCCESSFUL_LOGIN, result);
+ UserStatus.updateStatus(UserStatus.SessionStatus.LOGGED_IN, resources);
+ } else {
+ receiver.send(FAILED_LOGIN, result);
+ UserStatus.updateStatus(UserStatus.SessionStatus.NOT_LOGGED_IN, resources);
+ }
+ } else if (action.equalsIgnoreCase(LOG_OUT)) {
+ UserStatus.updateStatus(UserStatus.SessionStatus.LOGGING_OUT, resources);
+ if (logOut()) {
+ receiver.send(SUCCESSFUL_LOGOUT, Bundle.EMPTY);
+ android.util.Log.d(TAG, "Logged out, notifying user status");
+ UserStatus.updateStatus(UserStatus.SessionStatus.LOGGED_OUT, resources);
+ } else {
+ receiver.send(LOGOUT_FAILED, Bundle.EMPTY);
+ UserStatus.updateStatus(UserStatus.SessionStatus.DIDNT_LOG_OUT, resources);
+ }
+ } else if (action.equalsIgnoreCase(DOWNLOAD_CERTIFICATE)) {
+ if (updateVpnCertificate()) {
+ receiver.send(CORRECTLY_DOWNLOADED_CERTIFICATE, Bundle.EMPTY);
+ } else {
+ receiver.send(INCORRECTLY_DOWNLOADED_CERTIFICATE, Bundle.EMPTY);
+ }
+ } else if (action.equalsIgnoreCase(DOWNLOAD_EIP_SERVICE)) {
+ Bundle result = getAndSetEipServiceJson();
+ if (result.getBoolean(RESULT_KEY)) {
+ receiver.send(CORRECTLY_DOWNLOADED_EIP_SERVICE, result);
+ } else {
+ receiver.send(INCORRECTLY_DOWNLOADED_EIP_SERVICE, result);
+ }
+ }
+ }
+
+ private Bundle tryToRegister(Bundle task) {
+ Bundle result = new Bundle();
+ int progress = 0;
+
+ String username = User.userName();
+ String password = task.getString(SessionDialog.PASSWORD);
+
+ if (validUserLoginData(username, password)) {
+ result = register(username, password);
+ broadcastProgress(progress++);
+ } else {
+ if (!wellFormedPassword(password)) {
+ result.putBoolean(RESULT_KEY, false);
+ result.putString(SessionDialog.USERNAME, username);
+ result.putBoolean(SessionDialog.ERRORS.PASSWORD_INVALID_LENGTH.toString(), true);
+ }
+ if (!validUsername(username)) {
+ result.putBoolean(RESULT_KEY, false);
+ result.putBoolean(SessionDialog.ERRORS.USERNAME_MISSING.toString(), true);
+ }
+ }
+
+ return result;
+ }
+
+ private Bundle register(String username, String password) {
+ LeapSRPSession client = new LeapSRPSession(username, password);
+ byte[] salt = client.calculateNewSalt();
+
+ BigInteger password_verifier = client.calculateV(username, password, salt);
+
+ JSONObject api_result = sendNewUserDataToSRPServer(provider_api_url, username, new BigInteger(1, salt).toString(16), password_verifier.toString(16));
+
+ Bundle result = new Bundle();
+ if (api_result.has(ERRORS))
+ result = authFailedNotification(api_result, username);
+ else {
+ result.putString(SessionDialog.USERNAME, username);
+ result.putString(SessionDialog.PASSWORD, password);
+ result.putBoolean(RESULT_KEY, true);
+ }
+
+ return result;
+ }
+
+ /**
+ * Starts the authentication process using SRP protocol.
+ *
+ * @param task containing: username, password and api url.
+ * @return a bundle with a boolean value mapped to a key named RESULT_KEY, and which is true if authentication was successful.
+ */
+ private Bundle tryToAuthenticate(Bundle task) {
+ Bundle result = new Bundle();
+ int progress = 0;
+
+ String username = User.userName();
+ String password = task.getString(SessionDialog.PASSWORD);
+ if (validUserLoginData(username, password)) {
+ result = authenticate(username, password);
+ broadcastProgress(progress++);
+ } else {
+ if (!wellFormedPassword(password)) {
+ result.putBoolean(RESULT_KEY, false);
+ result.putString(SessionDialog.USERNAME, username);
+ result.putBoolean(SessionDialog.ERRORS.PASSWORD_INVALID_LENGTH.toString(), true);
+ }
+ if (!validUsername(username)) {
+ result.putBoolean(RESULT_KEY, false);
+ result.putBoolean(SessionDialog.ERRORS.USERNAME_MISSING.toString(), true);
+ }
+ }
+
+ return result;
+ }
+
+
+ private Bundle authenticate(String username, String password) {
+ Bundle result = new Bundle();
+
+ LeapSRPSession client = new LeapSRPSession(username, password);
+ byte[] A = client.exponential();
+
+ JSONObject step_result = sendAToSRPServer(provider_api_url, username, new BigInteger(1, A).toString(16));
+ try {
+ String salt = step_result.getString(LeapSRPSession.SALT);
+ byte[] Bbytes = new BigInteger(step_result.getString("B"), 16).toByteArray();
+ byte[] M1 = client.response(new BigInteger(salt, 16).toByteArray(), Bbytes);
+ if (M1 != null) {
+ step_result = sendM1ToSRPServer(provider_api_url, username, M1);
+ setTokenIfAvailable(step_result);
+ byte[] M2 = new BigInteger(step_result.getString(LeapSRPSession.M2), 16).toByteArray();
+ if (client.verify(M2)) {
+ result.putBoolean(RESULT_KEY, true);
+ } else {
+ authFailedNotification(step_result, username);
+ }
+ } else {
+ result.putBoolean(RESULT_KEY, false);
+ result.putString(SessionDialog.USERNAME, username);
+ result.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_srp_math_error_user_message));
+ }
+ } catch (JSONException e) {
+ result = authFailedNotification(step_result, username);
+ e.printStackTrace();
+ }
+
+ return result;
+ }
+
+ private boolean setTokenIfAvailable(JSONObject authentication_step_result) {
+ try {
+ LeapSRPSession.setToken(authentication_step_result.getString(LeapSRPSession.TOKEN));
+ CookieHandler.setDefault(null); // we don't need cookies anymore
+ } catch (JSONException e) { //
+ return false;
+ }
+ return true;
+ }
+
+ private Bundle authFailedNotification(JSONObject result, String username) {
+ Bundle user_notification_bundle = new Bundle();
+ try {
+ JSONObject error_message = result.getJSONObject(ERRORS);
+ String error_type = error_message.keys().next().toString();
+ String message = error_message.get(error_type).toString();
+ user_notification_bundle.putString(getResources().getString(R.string.user_message), message);
+ } catch (JSONException e) {
+ }
+
+ if (!username.isEmpty())
+ user_notification_bundle.putString(SessionDialog.USERNAME, username);
+ user_notification_bundle.putBoolean(RESULT_KEY, false);
+
+ return user_notification_bundle;
+ }
+
+ /**
+ * Sets up an intent with the progress value passed as a parameter
+ * and sends it as a broadcast.
+ *
+ * @param progress
+ */
+ private void broadcastProgress(int progress) {
+ Intent intentUpdate = new Intent();
+ intentUpdate.setAction(UPDATE_PROGRESSBAR);
+ intentUpdate.addCategory(Intent.CATEGORY_DEFAULT);
+ intentUpdate.putExtra(CURRENT_PROGRESS, progress);
+ sendBroadcast(intentUpdate);
+ }
+
+ /**
+ * Validates parameters entered by the user to log in
+ *
+ * @param username
+ * @param password
+ * @return true if both parameters are present and the entered password length is greater or equal to eight (8).
+ */
+ private boolean validUserLoginData(String username, String password) {
+ return validUsername(username) && wellFormedPassword(password);
+ }
+
+ private boolean validUsername(String username) {
+ return username != null && !username.isEmpty();
+ }
+
+ /**
+ * Validates a password
+ *
+ * @param password
+ * @return true if the entered password length is greater or equal to eight (8).
+ */
+ private boolean wellFormedPassword(String password) {
+ return password != null && password.length() >= 8;
+ }
+
+ /**
+ * Sends an HTTP POST request to the authentication server with the SRP Parameter A.
+ *
+ * @param server_url
+ * @param username
+ * @param clientA First SRP parameter sent
+ * @return response from authentication server
+ */
+ private JSONObject sendAToSRPServer(String server_url, String username, String clientA) {
+ Map<String, String> parameters = new HashMap<String, String>();
+ parameters.put("login", username);
+ parameters.put("A", clientA);
+ return sendToServer(server_url + "/sessions.json", "POST", parameters);
+ }
+
+ /**
+ * Sends an HTTP PUT request to the authentication server with the SRP Parameter M1 (or simply M).
+ *
+ * @param server_url
+ * @param username
+ * @param m1 Second SRP parameter sent
+ * @return response from authentication server
+ */
+ private JSONObject sendM1ToSRPServer(String server_url, String username, byte[] m1) {
+ Map<String, String> parameters = new HashMap<String, String>();
+ parameters.put("client_auth", new BigInteger(1, ConfigHelper.trim(m1)).toString(16));
+
+ return sendToServer(server_url + "/sessions/" + username + ".json", "PUT", parameters);
+ }
+
+ /**
+ * Sends an HTTP POST request to the api server to register a new user.
+ *
+ * @param server_url
+ * @param username
+ * @param salt
+ * @param password_verifier
+ * @return response from authentication server
+ */
+ private JSONObject sendNewUserDataToSRPServer(String server_url, String username, String salt, String password_verifier) {
+ Map<String, String> parameters = new HashMap<String, String>();
+ parameters.put("user[login]", username);
+ parameters.put("user[password_salt]", salt);
+ parameters.put("user[password_verifier]", password_verifier);
+ return sendToServer(server_url + "/users.json", "POST", parameters);
+ }
+
+ /**
+ * Executes an HTTP request expecting a JSON response.
+ *
+ * @param url
+ * @param request_method
+ * @param parameters
+ * @return response from authentication server
+ */
+ private JSONObject sendToServer(String url, String request_method, Map<String, String> parameters) {
+ JSONObject json_response;
+ HttpsURLConnection urlConnection = null;
+ try {
+ InputStream is = null;
+ urlConnection = (HttpsURLConnection) new URL(url).openConnection();
+ urlConnection.setRequestMethod(request_method);
+ String locale = Locale.getDefault().getLanguage() + Locale.getDefault().getCountry();
+ urlConnection.setRequestProperty("Accept-Language", locale);
+ urlConnection.setChunkedStreamingMode(0);
+ urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory());
+
+ DataOutputStream writer = new DataOutputStream(urlConnection.getOutputStream());
+ writer.writeBytes(formatHttpParameters(parameters));
+ writer.close();
+
+ is = urlConnection.getInputStream();
+ String plain_response = new Scanner(is).useDelimiter("\\A").next();
+ json_response = new JSONObject(plain_response);
+ } catch (ClientProtocolException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (IOException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (JSONException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (NoSuchAlgorithmException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (KeyManagementException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (KeyStoreException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ } catch (CertificateException e) {
+ json_response = getErrorMessage(urlConnection);
+ e.printStackTrace();
+ }
+
+ return json_response;
+ }
+
+ private JSONObject getErrorMessage(HttpsURLConnection urlConnection) {
+ JSONObject error_message = new JSONObject();
+ if (urlConnection != null) {
+ InputStream error_stream = urlConnection.getErrorStream();
+ if (error_stream != null) {
+ String error_response = new Scanner(error_stream).useDelimiter("\\A").next();
+ try {
+ error_message = new JSONObject(error_response);
+ } catch (JSONException e) {
+ e.printStackTrace();
+ }
+ urlConnection.disconnect();
+ }
+ }
+ return error_message;
+ }
+
+ private String formatHttpParameters(Map<String, String> parameters) throws UnsupportedEncodingException {
+ StringBuilder result = new StringBuilder();
+ boolean first = true;
+
+ Iterator<String> parameter_iterator = parameters.keySet().iterator();
+ while (parameter_iterator.hasNext()) {
+ if (first)
+ first = false;
+ else
+ result.append("&&");
+
+ String key = parameter_iterator.next();
+ String value = parameters.get(key);
+
+ result.append(URLEncoder.encode(key, "UTF-8"));
+ result.append("=");
+ result.append(URLEncoder.encode(value, "UTF-8"));
+ }
+
+ return result.toString();
+ }
+
+
+ /**
+ * Downloads a provider.json from a given URL, adding a new provider using the given name.
+ *
+ * @param task containing a boolean meaning if the provider is custom or not, another boolean meaning if the user completely trusts this provider, the provider name and its provider.json url.
+ * @return a bundle with a boolean value mapped to a key named RESULT_KEY, and which is true if the update was successful.
+ */
+ private Bundle setUpProvider(Bundle task) {
+ int progress = 0;
+ Bundle current_download = new Bundle();
+
+ if (task != null) {
+ last_danger_on = task.containsKey(ProviderItem.DANGER_ON) && task.getBoolean(ProviderItem.DANGER_ON);
+ last_provider_main_url = task.containsKey(Provider.MAIN_URL) ?
+ task.getString(Provider.MAIN_URL) :
+ "";
+ provider_ca_cert_fingerprint = task.containsKey(Provider.CA_CERT_FINGERPRINT) ?
+ task.getString(Provider.CA_CERT_FINGERPRINT) :
+ "";
+ CA_CERT_DOWNLOADED = PROVIDER_JSON_DOWNLOADED = EIP_SERVICE_JSON_DOWNLOADED = false;
+ go_ahead = true;
+ }
+
+ if (!PROVIDER_JSON_DOWNLOADED)
+ current_download = getAndSetProviderJson(last_provider_main_url, last_danger_on, provider_ca_cert_fingerprint);
+ if (PROVIDER_JSON_DOWNLOADED || (current_download.containsKey(RESULT_KEY) && current_download.getBoolean(RESULT_KEY))) {
+ broadcastProgress(progress++);
+ PROVIDER_JSON_DOWNLOADED = true;
+ current_download = downloadCACert(last_danger_on);
+
+ if (CA_CERT_DOWNLOADED || (current_download.containsKey(RESULT_KEY) && current_download.getBoolean(RESULT_KEY))) {
+ broadcastProgress(progress++);
+ CA_CERT_DOWNLOADED = true;
+ current_download = getAndSetEipServiceJson();
+ if (current_download.containsKey(RESULT_KEY) && current_download.getBoolean(RESULT_KEY)) {
+ broadcastProgress(progress++);
+ EIP_SERVICE_JSON_DOWNLOADED = true;
+ }
+ }
+ }
+
+ return current_download;
+ }
+
+ private Bundle downloadCACert(boolean danger_on) {
+ Bundle result = new Bundle();
+ try {
+ JSONObject provider_json = new JSONObject(preferences.getString(Provider.KEY, ""));
+ String ca_cert_url = provider_json.getString(Provider.CA_CERT_URI);
+ String cert_string = downloadWithCommercialCA(ca_cert_url, danger_on);
+
+ if (validCertificate(cert_string) && go_ahead) {
+ preferences.edit().putString(Provider.CA_CERT, cert_string).commit();
+ result.putBoolean(RESULT_KEY, true);
+ } else {
+ String reason_to_fail = pickErrorMessage(cert_string);
+ result.putString(ERRORS, reason_to_fail);
+ result.putBoolean(RESULT_KEY, false);
+ }
+ } catch (JSONException e) {
+ String reason_to_fail = formatErrorMessage(R.string.malformed_url);
+ result.putString(ERRORS, reason_to_fail);
+ result.putBoolean(RESULT_KEY, false);
+ }
+
+ return result;
+ }
+
+ public static boolean caCertDownloaded() {
+ return CA_CERT_DOWNLOADED;
+ }
+
+ private boolean validCertificate(String cert_string) {
+ boolean result = false;
+ if (!ConfigHelper.checkErroneousDownload(cert_string)) {
+ X509Certificate certificate = ConfigHelper.parseX509CertificateFromString(cert_string);
+ try {
+ if (certificate != null) {
+ JSONObject provider_json = new JSONObject(preferences.getString(Provider.KEY, ""));
+ String fingerprint = provider_json.getString(Provider.CA_CERT_FINGERPRINT);
+ String encoding = fingerprint.split(":")[0];
+ String expected_fingerprint = fingerprint.split(":")[1];
+ String real_fingerprint = base64toHex(Base64.encodeToString(
+ MessageDigest.getInstance(encoding).digest(certificate.getEncoded()),
+ Base64.DEFAULT));
+
+ result = real_fingerprint.trim().equalsIgnoreCase(expected_fingerprint.trim());
+ } else
+ result = false;
+ } catch (JSONException e) {
+ result = false;
+ } catch (NoSuchAlgorithmException e) {
+ result = false;
+ } catch (CertificateEncodingException e) {
+ result = false;
+ }
+ }
+
+ return result;
+ }
+
+ private String base64toHex(String base64_input) {
+ byte[] byteArray = Base64.decode(base64_input, Base64.DEFAULT);
+ int readBytes = byteArray.length;
+ StringBuffer hexData = new StringBuffer();
+ int onebyte;
+ for (int i = 0; i < readBytes; i++) {
+ onebyte = ((0x000000ff & byteArray[i]) | 0xffffff00);
+ hexData.append(Integer.toHexString(onebyte).substring(6));
+ }
+ return hexData.toString();
+ }
+
+ private Bundle getAndSetProviderJson(String provider_main_url, boolean danger_on, String provider_ca_cert_fingerprint) {
+ Bundle result = new Bundle();
+
+ if (go_ahead) {
+ String provider_dot_json_string;
+ if(provider_ca_cert_fingerprint.isEmpty())
+ provider_dot_json_string = downloadWithCommercialCA(provider_main_url + "/provider.json", danger_on);
+ else
+ provider_dot_json_string = downloadWithCommercialCA(provider_main_url + "/provider.json", danger_on, provider_ca_cert_fingerprint);
+
+ try {
+ JSONObject provider_json = new JSONObject(provider_dot_json_string);
+ provider_api_url = provider_json.getString(Provider.API_URL) + "/" + provider_json.getString(Provider.API_VERSION);
+ String name = provider_json.getString(Provider.NAME);
+ //TODO setProviderName(name);
+
+ preferences.edit().putString(Provider.KEY, provider_json.toString()).commit();
+ preferences.edit().putBoolean(Constants.ALLOWED_ANON, provider_json.getJSONObject(Provider.SERVICE).getBoolean(Constants.ALLOWED_ANON)).commit();
+ preferences.edit().putBoolean(Constants.ALLOWED_REGISTERED, provider_json.getJSONObject(Provider.SERVICE).getBoolean(Constants.ALLOWED_REGISTERED)).commit();
+
+ result.putBoolean(RESULT_KEY, true);
+ } catch (JSONException e) {
+ //TODO Error message should be contained in that provider_dot_json_string
+ String reason_to_fail = pickErrorMessage(provider_dot_json_string);
+ result.putString(ERRORS, reason_to_fail);
+ result.putBoolean(RESULT_KEY, false);
+ }
+ }
+ return result;
+ }
+
+ private Bundle getAndSetEipServiceJson() {
+ Bundle result = new Bundle();
+ String eip_service_json_string = "";
+ if (go_ahead) {
+ try {
+ JSONObject provider_json = new JSONObject(preferences.getString(Provider.KEY, ""));
+ String eip_service_url = provider_json.getString(Provider.API_URL) + "/" + provider_json.getString(Provider.API_VERSION) + "/" + EIP.SERVICE_API_PATH;
+ eip_service_json_string = downloadWithProviderCA(eip_service_url, true);
+ JSONObject eip_service_json = new JSONObject(eip_service_json_string);
+ eip_service_json.getInt(Provider.API_RETURN_SERIAL);
+
+ preferences.edit().putString(Constants.KEY, eip_service_json.toString()).commit();
+
+ result.putBoolean(RESULT_KEY, true);
+ } catch (JSONException e) {
+ String reason_to_fail = pickErrorMessage(eip_service_json_string);
+ result.putString(ERRORS, reason_to_fail);
+ result.putBoolean(RESULT_KEY, false);
+ }
+ }
+ return result;
+ }
+
+ /**
+ * Interprets the error message as a JSON object and extract the "errors" keyword pair.
+ * If the error message is not a JSON object, then it is returned untouched.
+ *
+ * @param string_json_error_message
+ * @return final error message
+ */
+ private String pickErrorMessage(String string_json_error_message) {
+ String error_message = "";
+ try {
+ JSONObject json_error_message = new JSONObject(string_json_error_message);
+ error_message = json_error_message.getString(ERRORS);
+ } catch (JSONException e) {
+ // TODO Auto-generated catch block
+ error_message = string_json_error_message;
+ }
+
+ return error_message;
+ }
+
+ private String downloadWithCommercialCA(String url_string, boolean danger_on, String ca_cert_fingerprint) {
+ String result = "";
+
+ int seconds_of_timeout = 2;
+ String[] pins = new String[] {ca_cert_fingerprint};
+ try {
+ URL url = new URL(url_string);
+ HttpsURLConnection connection = PinningHelper.getPinnedHttpsURLConnection(getApplicationContext(), pins, url);
+ connection.setConnectTimeout(seconds_of_timeout * 1000);
+ if (!LeapSRPSession.getToken().isEmpty())
+ connection.addRequestProperty(LeapSRPSession.AUTHORIZATION_HEADER, "Token token = " + LeapSRPSession.getToken());
+ result = new Scanner(connection.getInputStream()).useDelimiter("\\A").next();
+ } catch (IOException e) {
+ if(e instanceof SSLHandshakeException) {
+ result = danger_on ? downloadWithoutCA(url_string) :
+ formatErrorMessage(R.string.error_security_pinnedcertificate);
+ } else
+ result = formatErrorMessage(R.string.error_io_exception_user_message);
+ }
+
+ return result;
+ }
+
+ /**
+ * Tries to download the contents of the provided url using commercially validated CA certificate from chosen provider.
+ * <p/>
+ * If danger_on flag is true, SSL exceptions will be managed by futher methods that will try to use some bypass methods.
+ *
+ * @param string_url
+ * @param danger_on if the user completely trusts this provider
+ * @return
+ */
+ private String downloadWithCommercialCA(String string_url, boolean danger_on) {
+
+ String json_file_content = "";
+
+ URL provider_url = null;
+ int seconds_of_timeout = 2;
+ try {
+ provider_url = new URL(string_url);
+ URLConnection url_connection = provider_url.openConnection();
+
+ url_connection.setConnectTimeout(seconds_of_timeout * 1000);
+ if (!LeapSRPSession.getToken().isEmpty())
+ url_connection.addRequestProperty(LeapSRPSession.AUTHORIZATION_HEADER, "Token token = " + LeapSRPSession.getToken());
+ json_file_content = new Scanner(url_connection.getInputStream()).useDelimiter("\\A").next();
+ } catch (MalformedURLException e) {
+ json_file_content = formatErrorMessage(R.string.malformed_url);
+ } catch (SocketTimeoutException e) {
+ json_file_content = formatErrorMessage(R.string.server_unreachable_message);
+ } catch (SSLHandshakeException e) {
+ if (provider_url != null) {
+ json_file_content = downloadWithProviderCA(string_url, danger_on);
+ } else {
+ json_file_content = formatErrorMessage(R.string.certificate_error);
+ }
+ } catch (ConnectException e) {
+ json_file_content = formatErrorMessage(R.string.service_is_down_error);
+ } catch (FileNotFoundException e) {
+ json_file_content = formatErrorMessage(R.string.malformed_url);
+ } catch (Exception e) {
+ if (provider_url != null && danger_on) {
+ json_file_content = downloadWithProviderCA(string_url, danger_on);
+ }
+ }
+
+ return json_file_content;
+ }
+
+ /**
+ * Tries to download the contents of the provided url using not commercially validated CA certificate from chosen provider.
+ *
+ * @param url_string as a string
+ * @param danger_on true to download CA certificate in case it has not been downloaded.
+ * @return an empty string if it fails, the url content if not.
+ */
+ private String downloadWithProviderCA(String url_string, boolean danger_on) {
+ String json_file_content = "";
+
+ try {
+ URL url = new URL(url_string);
+ // Tell the URLConnection to use a SocketFactory from our SSLContext
+ HttpsURLConnection urlConnection =
+ (HttpsURLConnection) url.openConnection();
+ urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory());
+ if (!LeapSRPSession.getToken().isEmpty())
+ urlConnection.addRequestProperty(LeapSRPSession.AUTHORIZATION_HEADER, "Token token=" + LeapSRPSession.getToken());
+ json_file_content = new Scanner(urlConnection.getInputStream()).useDelimiter("\\A").next();
+ } catch (CertificateException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ } catch (UnknownHostException e) {
+ e.printStackTrace();
+ json_file_content = formatErrorMessage(R.string.server_unreachable_message);
+ } catch (IOException e) {
+ // The downloaded certificate doesn't validate our https connection.
+ if (danger_on) {
+ json_file_content = downloadWithoutCA(url_string);
+ } else {
+ json_file_content = formatErrorMessage(R.string.certificate_error);
+ }
+ } 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();
+ } catch (NoSuchElementException e) {
+ e.printStackTrace();
+ json_file_content = formatErrorMessage(R.string.server_unreachable_message);
+ }
+ return json_file_content;
+ }
+
+ private javax.net.ssl.SSLSocketFactory getProviderSSLSocketFactory() throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException, KeyManagementException {
+ String provider_cert_string = preferences.getString(Provider.CA_CERT, "");
+
+ java.security.cert.Certificate provider_certificate = ConfigHelper.parseX509CertificateFromString(provider_cert_string);
+
+ // Create a KeyStore containing our trusted CAs
+ String keyStoreType = KeyStore.getDefaultType();
+ KeyStore keyStore = KeyStore.getInstance(keyStoreType);
+ keyStore.load(null, null);
+ keyStore.setCertificateEntry("provider_ca_certificate", provider_certificate);
+
+ // 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);
+
+ return context.getSocketFactory();
+ }
+
+ /**
+ * Downloads the string that's in the url with any certificate.
+ */
+ private String downloadWithoutCA(String url_string) {
+ String string = "";
+ try {
+
+ HostnameVerifier hostnameVerifier = new HostnameVerifier() {
+ @Override
+ public boolean verify(String hostname, SSLSession session) {
+ return true;
+ }
+ };
+
+ 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;
+ }
+ }
+
+ SSLContext context = SSLContext.getInstance("TLS");
+ context.init(new KeyManager[0], new TrustManager[]{new DefaultTrustManager()}, new SecureRandom());
+
+ URL url = new URL(url_string);
+ HttpsURLConnection urlConnection = (HttpsURLConnection) url.openConnection();
+ urlConnection.setSSLSocketFactory(context.getSocketFactory());
+ urlConnection.setHostnameVerifier(hostnameVerifier);
+ string = new Scanner(urlConnection.getInputStream()).useDelimiter("\\A").next();
+ System.out.println("String ignoring certificate = " + string);
+ } catch (FileNotFoundException e) {
+ e.printStackTrace();
+ string = formatErrorMessage(R.string.malformed_url);
+ } catch (IOException e) {
+ // The downloaded certificate doesn't validate our https connection.
+ e.printStackTrace();
+ string = formatErrorMessage(R.string.certificate_error);
+ } catch (NoSuchAlgorithmException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ } catch (KeyManagementException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ return string;
+ }
+
+ /**
+ * Logs out from the api url retrieved from the task.
+ *
+ * @return true if there were no exceptions
+ */
+ private boolean logOut() {
+ String delete_url = provider_api_url + "/logout";
+
+ HttpsURLConnection urlConnection = null;
+ int responseCode = 0;
+ int progress = 0;
+ try {
+
+ urlConnection = (HttpsURLConnection) new URL(delete_url).openConnection();
+ urlConnection.setRequestMethod("DELETE");
+ urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory());
+
+ responseCode = urlConnection.getResponseCode();
+ broadcastProgress(progress++);
+ LeapSRPSession.setToken("");
+ } catch (ClientProtocolException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ return false;
+ } catch (IndexOutOfBoundsException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ return false;
+ } catch (IOException e) {
+ // TODO Auto-generated catch block
+ try {
+ if (urlConnection != null) {
+ responseCode = urlConnection.getResponseCode();
+ if (responseCode == 401) {
+ broadcastProgress(progress++);
+ LeapSRPSession.setToken("");
+ return true;
+ }
+ }
+ } catch (IOException e1) {
+ e1.printStackTrace();
+ }
+
+ e.printStackTrace();
+ return false;
+ } catch (KeyManagementException 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 (CertificateException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ }
+ return true;
+ }
+
+ /**
+ * Downloads a new OpenVPN certificate, attaching authenticated cookie for authenticated certificate.
+ *
+ * @return true if certificate was downloaded correctly, false if provider.json or danger_on flag are not present in SharedPreferences, or if the certificate url could not be parsed as a URI, or if there was an SSL error.
+ */
+ private boolean updateVpnCertificate() {
+ try {
+ JSONObject provider_json = new JSONObject(preferences.getString(Provider.KEY, ""));
+
+ String provider_main_url = provider_json.getString(Provider.API_URL);
+ URL new_cert_string_url = new URL(provider_main_url + "/" + provider_json.getString(Provider.API_VERSION) + "/" + Constants.CERTIFICATE);
+
+ boolean danger_on = preferences.getBoolean(ProviderItem.DANGER_ON, false);
+
+
+ String cert_string = downloadWithProviderCA(new_cert_string_url.toString(), danger_on);
+
+ if (cert_string.isEmpty() || ConfigHelper.checkErroneousDownload(cert_string))
+ return false;
+ else
+ return loadCertificate(cert_string);
+ } catch (JSONException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ return false;
+ } catch (MalformedURLException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ return false;
+ }
+ }
+
+ private boolean loadCertificate(String cert_string) {
+ try {
+ // API returns concatenated cert & key. Split them for OpenVPN options
+ String certificateString = null, keyString = null;
+ String[] certAndKey = cert_string.split("(?<=-\n)");
+ for (int i = 0; i < certAndKey.length - 1; i++) {
+ if (certAndKey[i].contains("KEY")) {
+ keyString = certAndKey[i++] + certAndKey[i];
+ } else if (certAndKey[i].contains("CERTIFICATE")) {
+ certificateString = certAndKey[i++] + certAndKey[i];
+ }
+ }
+ RSAPrivateKey keyCert = ConfigHelper.parseRsaKeyFromString(keyString);
+ keyString = Base64.encodeToString(keyCert.getEncoded(), Base64.DEFAULT);
+ preferences.edit().putString(Constants.PRIVATE_KEY, "-----BEGIN RSA PRIVATE KEY-----\n" + keyString + "-----END RSA PRIVATE KEY-----").commit();
+
+ X509Certificate certCert = ConfigHelper.parseX509CertificateFromString(certificateString);
+ certificateString = Base64.encodeToString(certCert.getEncoded(), Base64.DEFAULT);
+
+ preferences.edit().putString(Constants.CERTIFICATE, "-----BEGIN CERTIFICATE-----\n" + certificateString + "-----END CERTIFICATE-----").commit();
+
+ return true;
+ } catch (CertificateException e) {
+ // TODO Auto-generated catch block
+ e.printStackTrace();
+ return false;
+ }
+ }
+}