diff options
Diffstat (limited to 'src/se/leap/bitmaskclient/ProviderAPI.java')
| -rw-r--r-- | src/se/leap/bitmaskclient/ProviderAPI.java | 780 |
1 files changed, 780 insertions, 0 deletions
diff --git a/src/se/leap/bitmaskclient/ProviderAPI.java b/src/se/leap/bitmaskclient/ProviderAPI.java new file mode 100644 index 00000000..39b44e24 --- /dev/null +++ b/src/se/leap/bitmaskclient/ProviderAPI.java @@ -0,0 +1,780 @@ +/** + * 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 java.io.DataOutputStream; +import java.io.FileNotFoundException; +import java.io.IOException; +import java.io.InputStream; +import java.io.UnsupportedEncodingException; +import java.math.BigInteger; +import java.net.CookieHandler; +import java.net.CookieManager; +import java.net.CookiePolicy; +import java.net.MalformedURLException; +import java.net.SocketTimeoutException; +import java.net.URL; +import java.net.URLConnection; +import java.net.URLEncoder; +import java.net.UnknownHostException; +import java.security.KeyManagementException; +import java.security.KeyStore; +import java.security.KeyStoreException; +import java.security.NoSuchAlgorithmException; +import java.security.SecureRandom; +import java.security.cert.CertificateException; +import java.security.cert.X509Certificate; +import java.security.interfaces.RSAPrivateKey; +import java.util.HashMap; +import java.util.Iterator; +import java.util.Map; +import java.util.Scanner; + +import javax.net.ssl.HostnameVerifier; +import javax.net.ssl.HttpsURLConnection; +import javax.net.ssl.KeyManager; +import javax.net.ssl.SSLContext; +import javax.net.ssl.SSLSession; +import javax.net.ssl.TrustManager; +import javax.net.ssl.TrustManagerFactory; +import javax.net.ssl.X509TrustManager; + +import org.apache.http.client.ClientProtocolException; +import org.jboss.security.srp.SRPParameters; +import org.json.JSONException; +import org.json.JSONObject; + +import se.leap.bitmaskclient.R; +import se.leap.bitmaskclient.ProviderListContent.ProviderItem; +import android.app.IntentService; +import android.content.Intent; +import android.os.Bundle; +import android.os.Handler; +import android.os.ResultReceiver; +import android.util.Base64; +import android.util.Log; +import android.widget.Toast; + +/** + * Implements HTTP api methods used to manage communications with the provider server. + * + * 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 { + + private Handler mHandler; + + final public static String + DOWNLOAD_JSON_FILES_BUNDLE_EXTRA = "downloadJSONFiles", + UPDATE_PROVIDER_DOTJSON = "updateProviderDotJSON", + DOWNLOAD_NEW_PROVIDER_DOTJSON = "downloadNewProviderDotJSON", + SRP_REGISTER = "srpRegister", + SRP_AUTH = "srpAuth", + LOG_OUT = "logOut", + DOWNLOAD_CERTIFICATE = "downloadUserAuthedCertificate", + PARAMETERS = "parameters", + RESULT_KEY = "result", + RECEIVER_KEY = "receiver", + SESSION_ID_COOKIE_KEY = "session_id_cookie_key", + SESSION_ID_KEY = "session_id", + ERRORS = "errors" + ; + + final public static int + CUSTOM_PROVIDER_ADDED = 0, + CORRECTLY_DOWNLOADED_JSON_FILES = 1, + INCORRECTLY_DOWNLOADED_JSON_FILES = 2, + SRP_AUTHENTICATION_SUCCESSFUL = 3, + SRP_AUTHENTICATION_FAILED = 4, + SRP_REGISTRATION_SUCCESSFUL = 5, + SRP_REGISTRATION_FAILED = 6, + LOGOUT_SUCCESSFUL = 7, + LOGOUT_FAILED = 8, + CORRECTLY_DOWNLOADED_CERTIFICATE = 9, + INCORRECTLY_DOWNLOADED_CERTIFICATE = 10, + CORRECTLY_UPDATED_PROVIDER_DOT_JSON = 11, + INCORRECTLY_UPDATED_PROVIDER_DOT_JSON = 12, + CORRECTLY_DOWNLOADED_ANON_CERTIFICATE = 13, + INCORRECTLY_DOWNLOADED_ANON_CERTIFICATE = 14 + ; + + public ProviderAPI() { + super("ProviderAPI"); + Log.v("ClassName", "Provider API"); + } + + @Override + public void onCreate() { + super.onCreate(); + mHandler = new Handler(); + CookieHandler.setDefault(new CookieManager(null, CookiePolicy.ACCEPT_ORIGINAL_SERVER) ); + } + + private void displayToast(final int toast_string_id) { + mHandler.post(new Runnable() { + + @Override + public void run() { + Toast.makeText(ProviderAPI.this, toast_string_id, Toast.LENGTH_LONG).show(); + } + }); + } + + @Override + protected void onHandleIntent(Intent command) { + final ResultReceiver receiver = command.getParcelableExtra("receiver"); + String action = command.getAction(); + Bundle parameters = command.getBundleExtra(PARAMETERS); + + if(action.equalsIgnoreCase(DOWNLOAD_JSON_FILES_BUNDLE_EXTRA)) { + if(!downloadJsonFiles(parameters)) { + receiver.send(INCORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); + } else { + receiver.send(CORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); + } + } else if(action.equalsIgnoreCase(UPDATE_PROVIDER_DOTJSON)) { + Bundle result = updateProviderDotJSON(parameters); + if(result.getBoolean(RESULT_KEY)) { + receiver.send(CORRECTLY_UPDATED_PROVIDER_DOT_JSON, result); + } else { + receiver.send(INCORRECTLY_UPDATED_PROVIDER_DOT_JSON, Bundle.EMPTY); + } + } else if (action.equalsIgnoreCase(DOWNLOAD_NEW_PROVIDER_DOTJSON)) { + Bundle result = downloadNewProviderDotJSON(parameters); + if(result.getBoolean(RESULT_KEY)) { + receiver.send(CORRECTLY_UPDATED_PROVIDER_DOT_JSON, result); + } else { + receiver.send(INCORRECTLY_DOWNLOADED_JSON_FILES, Bundle.EMPTY); + } + } else if (action.equalsIgnoreCase(SRP_AUTH)) { + Bundle session_id_bundle = authenticateBySRP(parameters); + if(session_id_bundle.getBoolean(RESULT_KEY)) { + receiver.send(SRP_AUTHENTICATION_SUCCESSFUL, session_id_bundle); + } else { + receiver.send(SRP_AUTHENTICATION_FAILED, session_id_bundle); + } + } else if (action.equalsIgnoreCase(LOG_OUT)) { + if(logOut(parameters)) { + receiver.send(LOGOUT_SUCCESSFUL, Bundle.EMPTY); + } else { + receiver.send(LOGOUT_FAILED, Bundle.EMPTY); + } + } else if (action.equalsIgnoreCase(DOWNLOAD_CERTIFICATE)) { + if(getNewCert(parameters)) { + receiver.send(CORRECTLY_DOWNLOADED_CERTIFICATE, Bundle.EMPTY); + } else { + receiver.send(INCORRECTLY_DOWNLOADED_CERTIFICATE, Bundle.EMPTY); + } + } + } + + /** + * Downloads the main cert and the eip-service.json files given through the task parameter + * @param task + * @return true if eip-service.json was parsed as a JSON object correctly. + */ + private boolean downloadJsonFiles(Bundle task) { + String cert_url = task.getString(Provider.CA_CERT); + String eip_service_json_url = task.getString(EIP.KEY); + boolean danger_on = task.getBoolean(ProviderItem.DANGER_ON); + try { + String cert_string = downloadWithCommercialCA(cert_url, danger_on); + if(cert_string.isEmpty()) return false; + X509Certificate certCert = ConfigHelper.parseX509CertificateFromString(cert_string); + cert_string = Base64.encodeToString( certCert.getEncoded(), Base64.DEFAULT); + ConfigHelper.saveSharedPref(Provider.CA_CERT, "-----BEGIN CERTIFICATE-----\n"+cert_string+"-----END CERTIFICATE-----"); + + String eip_service_string = downloadWithCommercialCA(eip_service_json_url, danger_on); + ConfigHelper.saveSharedPref(EIP.KEY, new JSONObject(eip_service_string)); + + return true; + } catch (JSONException e) { + return false; + } catch (CertificateException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + return false; + } + } + + /** + * 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 authenticateBySRP(Bundle task) { + Bundle session_id_bundle = new Bundle(); + + String username = (String) task.get(LogInDialog.USERNAME); + String password = (String) task.get(LogInDialog.PASSWORD); + if(validUserLoginData(username, password)) { + String authentication_server = (String) task.get(Provider.API_URL); + + SRPParameters params = new SRPParameters(new BigInteger(ConfigHelper.NG_1024, 16).toByteArray(), ConfigHelper.G.toByteArray(), BigInteger.ZERO.toByteArray(), "SHA-256"); + 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) { + String salt = saltAndB.getString(LeapSRPSession.SALT); + byte[] Bbytes = new BigInteger(saltAndB.getString("B"), 16).toByteArray(); + byte[] M1 = client.response(new BigInteger(salt, 16).toByteArray(), Bbytes); + JSONObject session_idAndM2 = sendM1ToSRPServer(authentication_server, username, M1); + if(session_idAndM2.has(LeapSRPSession.M2) && client.verify((byte[])session_idAndM2.get(LeapSRPSession.M2))) { + session_id_bundle.putBoolean(RESULT_KEY, true); + } else { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_bad_user_password_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + } + } else { + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_bad_user_password_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + session_id_bundle.putBoolean(RESULT_KEY, false); + } + } catch (ClientProtocolException e) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_client_http_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + } catch (IOException e) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_io_exception_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + } catch (JSONException e) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_json_exception_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + } catch (NoSuchAlgorithmException e) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(getResources().getString(R.string.user_message), getResources().getString(R.string.error_no_such_algorithm_exception_user_message)); + session_id_bundle.putString(LogInDialog.USERNAME, username); + } catch (KeyManagementException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (KeyStoreException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (CertificateException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } + } else { + if(!wellFormedPassword(password)) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putString(LogInDialog.USERNAME, username); + session_id_bundle.putBoolean(LogInDialog.PASSWORD_INVALID_LENGTH, true); + } + if(username.isEmpty()) { + session_id_bundle.putBoolean(RESULT_KEY, false); + session_id_bundle.putBoolean(LogInDialog.USERNAME_MISSING, true); + } + } + + return session_id_bundle; + } + + /** + * Validates parameters entered by the user to log in + * @param entered_username + * @param entered_password + * @return true if both parameters are present and the entered password length is greater or equal to eight (8). + */ + private boolean validUserLoginData(String entered_username, String entered_password) { + return !(entered_username.isEmpty()) && wellFormedPassword(entered_password); + } + + /** + * Validates a password + * @param entered_password + * @return true if the entered password length is greater or equal to eight (8). + */ + private boolean wellFormedPassword(String entered_password) { + return entered_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 + * @throws ClientProtocolException + * @throws IOException + * @throws JSONException + * @throws CertificateException + * @throws NoSuchAlgorithmException + * @throws KeyStoreException + * @throws KeyManagementException + */ + private JSONObject sendAToSRPServer(String server_url, String username, String clientA) throws ClientProtocolException, IOException, JSONException, KeyManagementException, KeyStoreException, NoSuchAlgorithmException, CertificateException { + Map<String, String> parameters = new HashMap<String, String>(); + parameters.put("login", username); + parameters.put("A", clientA); + return sendToServer(server_url + "/sessions.json", "POST", parameters); + + /*HttpPost post = new HttpPost(server_url + "/sessions.json" + "?" + "login=" + username + "&&" + "A=" + clientA); + return sendToServer(post);*/ + } + + /** + * 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 + * @throws ClientProtocolException + * @throws IOException + * @throws JSONException + * @throws CertificateException + * @throws NoSuchAlgorithmException + * @throws KeyStoreException + * @throws KeyManagementException + */ + private JSONObject sendM1ToSRPServer(String server_url, String username, byte[] m1) throws ClientProtocolException, IOException, JSONException, KeyManagementException, KeyStoreException, NoSuchAlgorithmException, CertificateException { + Map<String, String> parameters = new HashMap<String, String>(); + parameters.put("client_auth", new BigInteger(1, ConfigHelper.trim(m1)).toString(16)); + + //HttpPut put = new HttpPut(server_url + "/sessions/" + username +".json" + "?" + "client_auth" + "=" + new BigInteger(1, ConfigHelper.trim(m1)).toString(16)); + JSONObject json_response = sendToServer(server_url + "/sessions/" + username +".json", "PUT", parameters); + + JSONObject session_idAndM2 = new JSONObject(); + if(json_response.length() > 0) { + byte[] M2_not_trimmed = new BigInteger(json_response.getString(LeapSRPSession.M2), 16).toByteArray(); + /*Cookie session_id_cookie = LeapHttpClient.getInstance(getApplicationContext()).getCookieStore().getCookies().get(0); + session_idAndM2.put(ConfigHelper.SESSION_ID_COOKIE_KEY, session_id_cookie.getName()); + session_idAndM2.put(ConfigHelper.SESSION_ID_KEY, session_id_cookie.getValue());*/ + session_idAndM2.put(LeapSRPSession.M2, ConfigHelper.trim(M2_not_trimmed)); + } + return session_idAndM2; + } + + /** + * Executes an HTTP request expecting a JSON response. + * @param url + * @param request_method + * @param parameters + * @return response from authentication server + * @throws IOException + * @throws JSONException + * @throws MalformedURLException + * @throws CertificateException + * @throws NoSuchAlgorithmException + * @throws KeyStoreException + * @throws KeyManagementException + */ + private JSONObject sendToServer(String url, String request_method, Map<String, String> parameters) throws JSONException, MalformedURLException, IOException, KeyManagementException, KeyStoreException, NoSuchAlgorithmException, CertificateException { + JSONObject json_response; + InputStream is = null; + HttpsURLConnection urlConnection = (HttpsURLConnection)new URL(url).openConnection(); + urlConnection.setRequestMethod(request_method); + urlConnection.setChunkedStreamingMode(0); + urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory()); + try { + + 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); + } finally { + InputStream error_stream = urlConnection.getErrorStream(); + if(error_stream != null) { + String error_response = new Scanner(error_stream).useDelimiter("\\A").next(); + urlConnection.disconnect(); + Log.d("Error", error_response); + json_response = new JSONObject(error_response); + if(!json_response.isNull(ERRORS) || json_response.has(ERRORS)) { + return new JSONObject(); + } + } + } + + return json_response; + } + + 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 updateProviderDotJSON(Bundle task) { + Bundle result = new Bundle(); + boolean custom = task.getBoolean(ProviderItem.CUSTOM); + boolean danger_on = task.getBoolean(ProviderItem.DANGER_ON); + String provider_json_url = task.getString(Provider.DOT_JSON_URL); + String provider_name = task.getString(Provider.NAME); + + try { + String provider_dot_json_string = downloadWithCommercialCA(provider_json_url, danger_on); + if(provider_dot_json_string.isEmpty()) { + result.putBoolean(RESULT_KEY, false); + } else { + JSONObject provider_json = new JSONObject(provider_dot_json_string); + ConfigHelper.saveSharedPref(EIP.ALLOWED_ANON, provider_json.getJSONObject(Provider.SERVICE).getBoolean(EIP.ALLOWED_ANON)); + + //ProviderListContent.addItem(new ProviderItem(provider_name, provider_json_url, provider_json, custom, danger_on)); + result.putBoolean(RESULT_KEY, true); + result.putString(Provider.KEY, provider_json.toString()); + result.putBoolean(ProviderItem.DANGER_ON, danger_on); + } + } catch (JSONException e) { + result.putBoolean(RESULT_KEY, false); + } + + return result; + } + + /** + * Downloads a custom provider provider.json file + * @param task containing a boolean meaning if the user completely trusts this provider, and the provider main url entered in the new custom provider dialog. + * @return true if provider.json file was successfully parsed as a JSON object. + */ + private Bundle downloadNewProviderDotJSON(Bundle task) { + Bundle result = new Bundle(); + boolean custom = true; + boolean danger_on = task.getBoolean(ProviderItem.DANGER_ON); + + String provider_main_url = (String) task.get(Provider.MAIN_URL); + String provider_name = provider_main_url.replaceFirst("http[s]?://", "").replaceFirst("\\/", "_"); + String provider_json_url = guessProviderDotJsonURL(provider_main_url); + + String provider_json_string = downloadWithCommercialCA(provider_json_url, danger_on); + try { + if(provider_json_string.isEmpty()) { + result.putBoolean(RESULT_KEY, false); + } else { + JSONObject provider_json = new JSONObject(provider_json_string); + + ConfigHelper.saveSharedPref(Provider.KEY, provider_json); + ConfigHelper.saveSharedPref(ProviderItem.DANGER_ON, danger_on); + ConfigHelper.saveSharedPref(EIP.ALLOWED_ANON, provider_json.getJSONObject(Provider.SERVICE).getBoolean(EIP.ALLOWED_ANON)); + ProviderItem added_provider = new ProviderItem(provider_name, provider_json_url, provider_json, custom, danger_on); + ProviderListContent.addItem(added_provider); + + result.putString(Provider.NAME, added_provider.getName()); + result.putBoolean(RESULT_KEY, true); + result.putString(Provider.KEY, provider_json.toString()); + result.putBoolean(ProviderItem.DANGER_ON, danger_on); + } + } catch (JSONException e) { + result.putBoolean(RESULT_KEY, false); + } + + return result; + } + + /** + * Tries to download the contents of the provided url using commercially validated CA certificate from chosen provider. + * + * 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 = 1; + try { + provider_url = new URL(string_url); + URLConnection url_connection = provider_url.openConnection(); + url_connection.setConnectTimeout(seconds_of_timeout*1000); + json_file_content = new Scanner(url_connection.getInputStream()).useDelimiter("\\A").next(); + } catch (MalformedURLException e) { + displayToast(R.string.malformed_url); + } catch(SocketTimeoutException e) { + displayToast(R.string.server_is_down_message); + } catch (FileNotFoundException e) { + e.printStackTrace(); + displayToast(R.string.server_is_down_message); + } catch (IOException e) { + if(provider_url != null) { + json_file_content = downloadWithProviderCA(provider_url, danger_on); + } else { + displayToast(R.string.certificate_error); + } + } catch (Exception e) { + if(provider_url != null && danger_on) { + json_file_content = downloadWithProviderCA(provider_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 + * @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(URL url, boolean danger_on) { + String json_file_content = ""; + + try { + // Tell the URLConnection to use a SocketFactory from our SSLContext + HttpsURLConnection urlConnection = + (HttpsURLConnection)url.openConnection(); + urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory()); + json_file_content = new Scanner(urlConnection.getInputStream()).useDelimiter("\\A").next(); + } catch (CertificateException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + } catch (UnknownHostException e) { + displayToast(R.string.server_is_down_message); + } catch (FileNotFoundException e) { + e.printStackTrace(); + displayToast(R.string.server_is_down_message); + } catch (IOException e) { + // The downloaded certificate doesn't validate our https connection. + if(danger_on) { + json_file_content = downloadWithoutCA(url); + } else { + displayToast(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(); + } + return json_file_content; + } + + private javax.net.ssl.SSLSocketFactory getProviderSSLSocketFactory() throws KeyStoreException, NoSuchAlgorithmException, CertificateException, IOException, KeyManagementException { + String provider_cert_string = ConfigHelper.getStringFromSharedPref(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(URL url) { + 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()); + + 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(); + displayToast(R.string.server_is_down_message); + } catch (IOException e) { + // The downloaded certificate doesn't validate our https connection. + e.printStackTrace(); + displayToast(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; + } + + /** + * Tries to guess the provider.json url given the main provider url. + * @param provider_main_url + * @return the guessed provider.json url + */ + private String guessProviderDotJsonURL(String provider_main_url) { + return provider_main_url + "/provider.json"; + } + + /** + * Logs out from the api url retrieved from the task. + * @param task containing api url from which the user will log out + * @return true if there were no exceptions + */ + private boolean logOut(Bundle task) { + try { + String delete_url = task.getString(Provider.API_URL) + "/logout"; + + HttpsURLConnection urlConnection = (HttpsURLConnection)new URL(delete_url).openConnection(); + urlConnection.setRequestMethod("DELETE"); + urlConnection.setSSLSocketFactory(getProviderSSLSocketFactory()); + + int responseCode = urlConnection.getResponseCode(); + Log.d("logout", Integer.toString(responseCode)); + } 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 + 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. + * + * @param task containing the type of the certificate to be downloaded + * @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 getNewCert(Bundle task) { + + try { + String type_of_certificate = task.getString(ConfigurationWizard.TYPE_OF_CERTIFICATE); + JSONObject provider_json = ConfigHelper.getJsonFromSharedPref(Provider.KEY); + URL provider_main_url = new URL(provider_json.getString(Provider.API_URL)); + String new_cert_string_url = provider_main_url.toString() + "/" + provider_json.getString(Provider.API_VERSION) + "/" + EIP.CERTIFICATE; + + boolean danger_on = ConfigHelper.getBoolFromSharedPref(ProviderItem.DANGER_ON); + String cert_string = downloadWithCommercialCA(new_cert_string_url, danger_on); + if(!cert_string.isEmpty()) { + // 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]; + } + } + try { + RSAPrivateKey keyCert = ConfigHelper.parseRsaKeyFromString(keyString); + keyString = Base64.encodeToString( keyCert.getEncoded(), Base64.DEFAULT ); + ConfigHelper.saveSharedPref(EIP.PRIVATE_KEY, "-----BEGIN RSA PRIVATE KEY-----\n"+keyString+"-----END RSA PRIVATE KEY-----"); + + X509Certificate certCert = ConfigHelper.parseX509CertificateFromString(certificateString); + certificateString = Base64.encodeToString( certCert.getEncoded(), Base64.DEFAULT); + ConfigHelper.saveSharedPref(EIP.CERTIFICATE, "-----BEGIN CERTIFICATE-----\n"+certificateString+"-----END CERTIFICATE-----"); + + return true; + } catch (CertificateException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + return false; + } + } else { + return false; + } + } catch (IOException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + return false; + } catch (JSONException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + return false; + } /*catch (URISyntaxException e) { + // TODO Auto-generated catch block + e.printStackTrace(); + return false; + }*/ + } +} |