src/com/owncloud/android/authentication/AuthenticatorActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *   GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 package com.owncloud.android.authentication;
  21
  22 import com.owncloud.android.AccountUtils;
  23 import com.owncloud.android.ui.dialog.SslValidatorDialog;
  24 import com.owncloud.android.ui.dialog.SslValidatorDialog.OnSslValidatorListener;
  25 import com.owncloud.android.utils.OwnCloudVersion;
  26 import com.owncloud.android.network.OwnCloudClientUtils;
  27 import com.owncloud.android.operations.OwnCloudServerCheckOperation;
  28 import com.owncloud.android.operations.ExistenceCheckOperation;
  29 import com.owncloud.android.operations.OAuth2GetAccessToken;
  30 import com.owncloud.android.operations.OnRemoteOperationListener;
  31 import com.owncloud.android.operations.RemoteOperation;
  32 import com.owncloud.android.operations.RemoteOperationResult;
  33 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  34
  35 import android.accounts.Account;
  36 import android.accounts.AccountAuthenticatorActivity;
  37 import android.accounts.AccountManager;
  38 import android.app.AlertDialog;
  39 import android.app.Dialog;
  40 import android.app.ProgressDialog;
  41 import android.content.ContentResolver;
  42 import android.content.DialogInterface;
  43 import android.content.Intent;
  44 import android.content.SharedPreferences;
  45 import android.net.Uri;
  46 import android.os.Bundle;
  47 import android.os.Handler;
  48 import android.preference.PreferenceManager;
  49 import android.text.InputType;
  50 import android.util.Log;
  51 import android.view.View;
  52 import android.view.View.OnFocusChangeListener;
  53 import android.view.Window;
  54 import android.widget.CheckBox;
  55 import android.widget.EditText;
  56 import android.widget.Button;
  57 import android.widget.ImageView;
  58 import android.widget.TextView;
  59 import android.widget.Toast;
  60
  61 import com.owncloud.android.R;
  62
  63 import eu.alefzero.webdav.WebdavClient;
  64
  65 /**
  66  * This Activity is used to add an ownCloud account to the App
  67  *
  68  * @author Bartek Przybylski
  69  * @author David A. Velasco
  70  */
  71 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  72         implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener {
  73
  74     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  75
  76     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  77     public static final String EXTRA_USER_NAME = "USER_NAME";
  78     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  79     public static final String EXTRA_ACTION = "ACTION";
  80
  81     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  82     private static final String KEY_OC_VERSION = "OC_VERSION";
  83     private static final String KEY_ACCOUNT = "ACCOUNT";
  84     private static final String KEY_STATUS_TEXT = "STATUS_TEXT";
  85     private static final String KEY_STATUS_ICON = "STATUS_ICON";
  86     private static final String KEY_STATUS_CORRECT = "STATUS_CORRECT";
  87     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  88     private static final String KEY_OAUTH2_STATUS_TEXT = "OAUTH2_STATUS_TEXT";
  89     private static final String KEY_OAUTH2_STATUS_ICON = "OAUTH2_STATUS_ICON";
  90
  91     private static final int DIALOG_LOGIN_PROGRESS = 0;
  92     private static final int DIALOG_SSL_VALIDATOR = 1;
  93     private static final int DIALOG_CERT_NOT_SAVED = 2;
  94     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
  95
  96     public static final byte ACTION_CREATE = 0;
  97     public static final byte ACTION_UPDATE_TOKEN = 1;
  98
  99
 100     private String mHostBaseUrl;
 101     private OwnCloudVersion mDiscoveredVersion;
 102
 103     private int mStatusText, mStatusIcon;
 104     private boolean mStatusCorrect, mIsSslConn;
 105     private int mOAuth2StatusText, mOAuth2StatusIcon;
 106
 107     private final Handler mHandler = new Handler();
 108     private Thread mOperationThread;
 109     private OwnCloudServerCheckOperation mOcServerChkOperation;
 110     private ExistenceCheckOperation mAuthCheckOperation;
 111     private RemoteOperationResult mLastSslUntrustedServerResult;
 112
 113     private Uri mNewCapturedUriFromOAuth2Redirection;
 114
 115     private AccountManager mAccountMgr;
 116     private boolean mJustCreated;
 117     private byte mAction;
 118     private Account mAccount;
 119
 120     private ImageView mRefreshButton;
 121     private ImageView mViewPasswordButton;
 122     private EditText mHostUrlInput;
 123     private EditText mUsernameInput;
 124     private EditText mPasswordInput;
 125     private CheckBox mOAuth2Check;
 126     private String mOAuthAccessToken;
 127     private View mOkButton;
 128     private TextView mAuthStatusLayout;
 129
 130     private TextView mOAuthAuthEndpointText;
 131     private TextView mOAuthTokenEndpointText;
 132
 133
 134     /**
 135      * {@inheritDoc}
 136      *
 137      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 138      */
 139     @Override
 140     protected void onCreate(Bundle savedInstanceState) {
 141         super.onCreate(savedInstanceState);
 142         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 143
 144         /// set view and get references to view elements
 145         setContentView(R.layout.account_setup);
 146         mRefreshButton = (ImageView) findViewById(R.id.refreshButton);
 147         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 148         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 149         mUsernameInput = (EditText) findViewById(R.id.account_username);
 150         mPasswordInput = (EditText) findViewById(R.id.account_password);
 151         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 152         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 153         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 154         mOkButton = findViewById(R.id.buttonOK);
 155         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 156
 157
 158         /// complete label for 'register account' button
 159         Button b = (Button) findViewById(R.id.account_register);
 160         if (b != null) {
 161             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 162         }
 163
 164         /// bind view elements to listeners
 165         mHostUrlInput.setOnFocusChangeListener(this);
 166         mPasswordInput.setOnFocusChangeListener(this);
 167
 168         /// initialization
 169         mAccountMgr = AccountManager.get(this);
 170         mNewCapturedUriFromOAuth2Redirection = null;
 171         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 172         mAccount = null;
 173
 174         if (savedInstanceState == null) {
 175             /// connection state and info
 176             mStatusText = mStatusIcon = 0;
 177             mStatusCorrect = false;
 178             mIsSslConn = false;
 179
 180             /// retrieve extras from intent
 181             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 182             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType);
 183
 184             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 185             if (mAccount != null) {
 186                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 187                 if (ocVersion != null) {
 188                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 189                 }
 190                 mHostBaseUrl = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL);
 191                 mHostUrlInput.setText(mHostBaseUrl);
 192                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 193                 mUsernameInput.setText(userName);
 194                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 195             }
 196             mOAuth2Check.setChecked(oAuthRequired);
 197             changeViewByOAuth2Check(oAuthRequired);
 198
 199
 200         } else {
 201             loadSavedInstanceState(savedInstanceState);
 202         }
 203
 204         if (mAction == ACTION_UPDATE_TOKEN) {
 205             /// lock things that should not change
 206             mHostUrlInput.setEnabled(false);
 207             mUsernameInput.setEnabled(false);
 208             mOAuth2Check.setVisibility(View.GONE);
 209             checkOcServer();
 210         }
 211
 212         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 213         mJustCreated = true;
 214     }
 215
 216
 217     /**
 218      * Saves relevant state before {@link #onPause()}
 219      *
 220      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 221      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 222      *
 223      * See {@link #loadSavedInstanceState(Bundle)}
 224      */
 225     @Override
 226     protected void onSaveInstanceState(Bundle outState) {
 227         super.onSaveInstanceState(outState);
 228
 229         /// connection state and info
 230         outState.putInt(KEY_STATUS_TEXT, mStatusText);
 231         outState.putInt(KEY_STATUS_ICON, mStatusIcon);
 232         outState.putBoolean(KEY_STATUS_CORRECT, mStatusCorrect);
 233         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 234
 235         /// server data
 236         if (mDiscoveredVersion != null)
 237             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 238         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 239
 240         /// account data, if updating
 241         if (mAccount != null)
 242             outState.putParcelable(KEY_ACCOUNT, mAccount);
 243
 244         // Saving the state of oAuth2 components.
 245         outState.putInt(KEY_OAUTH2_STATUS_ICON, mOAuth2StatusIcon);
 246         outState.putInt(KEY_OAUTH2_STATUS_TEXT, mOAuth2StatusText);
 247
 248     }
 249
 250
 251     /**
 252      * Loads saved state
 253      *
 254      * See {@link #onSaveInstanceState(Bundle)}.
 255      *
 256      * @param savedInstanceState    Saved state, as received in {@link #onCreate(Bundle)}.
 257      */
 258     private void loadSavedInstanceState(Bundle savedInstanceState) {
 259         /// connection state and info
 260         mStatusCorrect = savedInstanceState.getBoolean(KEY_STATUS_CORRECT);
 261         mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 262         mStatusText = savedInstanceState.getInt(KEY_STATUS_TEXT);
 263         mStatusIcon = savedInstanceState.getInt(KEY_STATUS_ICON);
 264         updateConnStatus();
 265
 266         /// UI settings depending upon connection
 267         mOkButton.setEnabled(mStatusCorrect);   // TODO really necessary?
 268         if (!mStatusCorrect)
 269             mRefreshButton.setVisibility(View.VISIBLE); // seems that setting visibility is necessary
 270         else
 271             mRefreshButton.setVisibility(View.INVISIBLE);
 272
 273         /// server data
 274         String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 275         if (ocVersion != null)
 276             mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 277         mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 278
 279         // account data, if updating
 280         mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 281
 282         // state of oAuth2 components
 283         mOAuth2StatusIcon = savedInstanceState.getInt(KEY_OAUTH2_STATUS_ICON);
 284         mOAuth2StatusText = savedInstanceState.getInt(KEY_OAUTH2_STATUS_TEXT);
 285         // END of getting the state of oAuth2 components.
 286     }
 287
 288
 289     /**
 290      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 291      * is caught here.
 292      *
 293      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 294      * AndroidManifest.xml file.
 295      */
 296     @Override
 297     protected void onNewIntent (Intent intent) {
 298         Log.d(TAG, "onNewIntent()");
 299         Uri data = intent.getData();
 300         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 301             mNewCapturedUriFromOAuth2Redirection = data;
 302         }
 303     }
 304
 305
 306     /**
 307      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 308      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 309      */
 310     @Override
 311     protected void onResume() {
 312         super.onResume();
 313         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 314         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 315         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 316             if (mOAuth2Check.isChecked())
 317                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 318             else
 319                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 320         }
 321
 322         if (mNewCapturedUriFromOAuth2Redirection != null) {
 323             getOAuth2AccessTokenFromCapturedRedirection();
 324         }
 325
 326         mJustCreated = false;
 327     }
 328
 329
 330     /**
 331      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 332      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 333      */
 334     private void getOAuth2AccessTokenFromCapturedRedirection() {
 335         /// Parse data from OAuth redirection
 336         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 337         mNewCapturedUriFromOAuth2Redirection = null;
 338
 339         /// Showing the dialog with instructions for the user.
 340         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 341
 342         /// GET ACCESS TOKEN to the oAuth server
 343         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 344                                                                 getString(R.string.oauth2_redirect_uri), // TODO check - necessary here?
 345                                                                 getString(R.string.oauth2_grant_type),
 346                                                                 queryParameters);
 347         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 348         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 349         operation.execute(client, this, mHandler);
 350     }
 351
 352
 353
 354     /**
 355      * Handles the change of focus on the text inputs for the server URL and the password
 356      */
 357     public void onFocusChange(View view, boolean hasFocus) {
 358         if (view.getId() == R.id.hostUrlInput) {
 359             onUrlInputFocusChanged((TextView) view, hasFocus);
 360
 361         } else if (view.getId() == R.id.account_password) {
 362             onPasswordFocusChanged((TextView) view, hasFocus);
 363         }
 364     }
 365
 366
 367     /**
 368      * Handles changes in focus on the text input for the server URL.
 369      *
 370      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 371      * other field. The operation to check the existence of the server in the entered URL is
 372      * started.
 373      *
 374      * When hasFocus:    user 'comes back' to write again the server URL.
 375      *
 376      * @param hostInput     TextView with the URL input field receiving the change of focus.
 377      * @param hasFocus      'True' if focus is received, 'false' if is lost
 378      */
 379     private void onUrlInputFocusChanged(TextView hostInput, boolean hasFocus) {
 380         if (!hasFocus) {
 381             checkOcServer();
 382
 383         } else {
 384             // avoids that the 'connect' button can be clicked if the test was previously passed
 385             mOkButton.setEnabled(false);
 386         }
 387     }
 388
 389
 390     private void checkOcServer() {
 391         String uri = mHostUrlInput.getText().toString().trim();
 392         if (uri.length() != 0) {
 393             mStatusText = R.string.auth_testing_connection;
 394             mStatusIcon = R.drawable.progress_small;
 395             updateConnStatus();
 396             /** TODO cancel previous connection check if the user tries to ammend a wrong URL
 397             if(mConnChkOperation != null) {
 398                 mConnChkOperation.cancel();
 399             } */
 400             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 401             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 402             mHostBaseUrl = "";
 403             mDiscoveredVersion = null;
 404             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 405         } else {
 406             mRefreshButton.setVisibility(View.INVISIBLE);
 407             mStatusText = 0;
 408             mStatusIcon = 0;
 409             updateConnStatus();
 410         }
 411     }
 412
 413
 414     /**
 415      * Handles changes in focus on the text input for the password (basic authorization).
 416      *
 417      * When (hasFocus), the button to toggle password visibility is shown.
 418      *
 419      * When (!hasFocus), the button is made invisible and the password is hidden.
 420      *
 421      * @param passwordInput    TextView with the password input field receiving the change of focus.
 422      * @param hasFocus          'True' if focus is received, 'false' if is lost
 423      */
 424     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 425         if (hasFocus) {
 426             mViewPasswordButton.setVisibility(View.VISIBLE);
 427         } else {
 428             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 429             passwordInput.setInputType(input_type);
 430             mViewPasswordButton.setVisibility(View.INVISIBLE);
 431         }
 432     }
 433
 434
 435
 436     /**
 437      * Cancels the authenticator activity
 438      *
 439      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 440      *
 441      * This method is bound in the layout/acceoun_setup.xml resource file.
 442      *
 443      * @param view      Cancel button
 444      */
 445     public void onCancelClick(View view) {
 446         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 447         finish();
 448     }
 449
 450
 451
 452     /**
 453      * Checks the credentials of the user in the root of the ownCloud server
 454      * before creating a new local account.
 455      *
 456      * For basic authorization, a check of existence of the root folder is
 457      * performed.
 458      *
 459      * For OAuth, starts the flow to get an access token; the credentials test
 460      * is postponed until it is available.
 461      *
 462      * IMPORTANT ENTRY POINT 4
 463      *
 464      * @param view      OK button
 465      */
 466     public void onOkClick(View view) {
 467         // this check should be unnecessary
 468         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 469             mStatusIcon = R.drawable.common_error;
 470             mStatusText = R.string.auth_wtf_reenter_URL;
 471             updateConnStatus();
 472             mOkButton.setEnabled(false);
 473             Log.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 474             return;
 475         }
 476
 477         if (mOAuth2Check.isChecked()) {
 478             startOauthorization();
 479
 480         } else {
 481             checkBasicAuthorization();
 482         }
 483     }
 484
 485
 486     /**
 487      * Tests the credentials entered by the user performing a check of existence on
 488      * the root folder of the ownCloud server.
 489      */
 490     private void checkBasicAuthorization() {
 491         /// get the path to the root folder through WebDAV from the version server
 492         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 493
 494         /// get basic credentials entered by user
 495         String username = mUsernameInput.getText().toString();
 496         String password = mPasswordInput.getText().toString();
 497
 498         /// be gentle with the user
 499         showDialog(DIALOG_LOGIN_PROGRESS);
 500
 501         /// test credentials accessing the root folder
 502         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 503         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 504         client.setBasicCredentials(username, password);
 505         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 506     }
 507
 508
 509     /**
 510      * Starts the OAuth 'grant type' flow to get an access token, with
 511      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 512      */
 513     private void startOauthorization() {
 514         // be gentle with the user
 515         mStatusIcon = R.drawable.progress_small;
 516         mStatusText = R.string.oauth_login_connection;
 517         updateAuthStatus();
 518
 519         // GET AUTHORIZATION request
 520         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 521         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 522         Uri.Builder uriBuilder = uri.buildUpon();
 523         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 524         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 525         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 526         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 527         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 528         uri = uriBuilder.build();
 529         Log.d(TAG, "Starting browser to view " + uri.toString());
 530         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 531         startActivity(i);
 532     }
 533
 534
 535     /**
 536      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 537      *
 538      * Dispatches the operation flow to the right method.
 539      */
 540     @Override
 541     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 542
 543         if (operation instanceof OwnCloudServerCheckOperation) {
 544             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 545
 546         } else if (operation instanceof OAuth2GetAccessToken) {
 547             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 548
 549         } else if (operation instanceof ExistenceCheckOperation)  {
 550             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 551
 552         }
 553     }
 554
 555
 556     /**
 557      * Processes the result of the server check performed when the user finishes the enter of the
 558      * server URL.
 559      *
 560      * @param operation     Server check performed.
 561      * @param result        Result of the check.
 562      */
 563     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 564         /// update status icon and text
 565         updateStatusIconAndText(result);
 566         updateConnStatus();
 567
 568         /// save result state
 569         mStatusCorrect = result.isSuccess();
 570         mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 571
 572         /// very special case (TODO: move to a common place for all the remote operations)
 573         if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 574             mLastSslUntrustedServerResult = result;
 575             showDialog(DIALOG_SSL_VALIDATOR);
 576         }
 577
 578         /// update the visibility of the 'retry connection' button
 579         if (!mStatusCorrect)
 580             mRefreshButton.setVisibility(View.VISIBLE);
 581         else
 582             mRefreshButton.setVisibility(View.INVISIBLE);
 583
 584         /// retrieve discovered version and normalize server URL
 585         mDiscoveredVersion = operation.getDiscoveredVersion();
 586         mHostBaseUrl = mHostUrlInput.getText().toString().trim();
 587         if (!mHostBaseUrl.toLowerCase().startsWith("http://") &&
 588             !mHostBaseUrl.toLowerCase().startsWith("https://")) {
 589
 590             if (mIsSslConn) {
 591                 mHostBaseUrl = "https://" + mHostBaseUrl;
 592             } else {
 593                 mHostBaseUrl = "http://" + mHostBaseUrl;
 594             }
 595
 596         }
 597         if (mHostBaseUrl.endsWith("/"))
 598             mHostBaseUrl = mHostBaseUrl.substring(0, mHostBaseUrl.length() - 1);
 599
 600         /// allow or not the user try to access the server
 601         mOkButton.setEnabled(mStatusCorrect);
 602     }
 603
 604
 605     /**
 606      * Chooses the right icon and text to show to the user for the received operation result.
 607      *
 608      * @param result    Result of a remote operation performed in this activity
 609      */
 610     private void updateStatusIconAndText(RemoteOperationResult result) {
 611         mStatusText = mStatusIcon = 0;
 612
 613         switch (result.getCode()) {
 614         case OK_SSL:
 615             mStatusIcon = android.R.drawable.ic_secure;
 616             mStatusText = R.string.auth_secure_connection;
 617             break;
 618
 619         case OK_NO_SSL:
 620         case OK:
 621             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 622                 mStatusText = R.string.auth_connection_established;
 623                 mStatusIcon = R.drawable.ic_ok;
 624             } else {
 625                 mStatusText = R.string.auth_nossl_plain_ok_title;
 626                 mStatusIcon = android.R.drawable.ic_partial_secure;
 627             }
 628             break;
 629
 630         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 631             mStatusIcon = R.drawable.common_error;
 632             mStatusText = R.string.auth_ssl_unverified_server_title;
 633             break;
 634
 635         case BAD_OC_VERSION:
 636             mStatusIcon = R.drawable.common_error;
 637             mStatusText = R.string.auth_bad_oc_version_title;
 638             break;
 639         case WRONG_CONNECTION:
 640             mStatusIcon = R.drawable.common_error;
 641             mStatusText = R.string.auth_wrong_connection_title;
 642             break;
 643         case TIMEOUT:
 644             mStatusIcon = R.drawable.common_error;
 645             mStatusText = R.string.auth_timeout_title;
 646             break;
 647         case INCORRECT_ADDRESS:
 648             mStatusIcon = R.drawable.common_error;
 649             mStatusText = R.string.auth_incorrect_address_title;
 650             break;
 651
 652         case SSL_ERROR:
 653             mStatusIcon = R.drawable.common_error;
 654             mStatusText = R.string.auth_ssl_general_error_title;
 655             break;
 656
 657         case UNAUTHORIZED:
 658             mStatusIcon = R.drawable.common_error;
 659             mStatusText = R.string.auth_unauthorized;
 660             break;
 661         case HOST_NOT_AVAILABLE:
 662             mStatusIcon = R.drawable.common_error;
 663             mStatusText = R.string.auth_unknown_host_title;
 664             break;
 665         case NO_NETWORK_CONNECTION:
 666             mStatusIcon = R.drawable.no_network;
 667             mStatusText = R.string.auth_no_net_conn_title;
 668             break;
 669         case INSTANCE_NOT_CONFIGURED:
 670             mStatusIcon = R.drawable.common_error;
 671             mStatusText = R.string.auth_not_configured_title;
 672             break;
 673         case FILE_NOT_FOUND:
 674             mStatusIcon = R.drawable.common_error;
 675             mStatusText = R.string.auth_incorrect_path_title;
 676             break;
 677         case OAUTH2_ERROR:
 678             mStatusIcon = R.drawable.common_error;
 679             mStatusText = R.string.auth_oauth_error;
 680             break;
 681         case OAUTH2_ERROR_ACCESS_DENIED:
 682             mStatusIcon = R.drawable.common_error;
 683             mStatusText = R.string.auth_oauth_error_access_denied;
 684             break;
 685         case UNHANDLED_HTTP_CODE:
 686         case UNKNOWN_ERROR:
 687             mStatusIcon = R.drawable.common_error;
 688             mStatusText = R.string.auth_unknown_error_title;
 689             break;
 690
 691         default:
 692             break;
 693         }
 694     }
 695
 696
 697     /**
 698      * Processes the result of the request for and access token send
 699      * to an OAuth authorization server.
 700      *
 701      * @param operation     Operation performed requesting the access token.
 702      * @param result        Result of the operation.
 703      */
 704     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 705         try {
 706             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 707         } catch (IllegalArgumentException e) {
 708             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 709         }
 710
 711         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 712         if (result.isSuccess() && webdav_path != null) {
 713             /// be gentle with the user
 714             showDialog(DIALOG_LOGIN_PROGRESS);
 715
 716             /// time to test the retrieved access token on the ownCloud server
 717             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 718             Log.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 719             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 720             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 721             client.setBearerCredentials(mOAuthAccessToken);
 722             mAuthCheckOperation.execute(client, this, mHandler);
 723
 724         } else {
 725             updateStatusIconAndText(result);
 726             updateAuthStatus();
 727             Log.d(TAG, "Access failed: " + result.getLogMessage());
 728         }
 729     }
 730
 731
 732     /**
 733      * Processes the result of the access check performed to try the user credentials.
 734      *
 735      * Creates a new account through the AccountManager.
 736      *
 737      * @param operation     Access check performed.
 738      * @param result        Result of the operation.
 739      */
 740     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 741         try {
 742             dismissDialog(DIALOG_LOGIN_PROGRESS);
 743         } catch (IllegalArgumentException e) {
 744             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 745         }
 746
 747         if (result.isSuccess()) {
 748             Log.d(TAG, "Successful access - time to save the account");
 749
 750             if (mAction == ACTION_CREATE) {
 751                 createAccount();
 752
 753             } else {
 754                 updateToken();
 755             }
 756
 757             finish();
 758
 759         } else {
 760             updateStatusIconAndText(result);
 761             updateAuthStatus();
 762             Log.d(TAG, "Access failed: " + result.getLogMessage());
 763         }
 764     }
 765
 766
 767     /**
 768      * Sets the proper response to get that the Account Authenticator that started this activity saves
 769      * a new authorization token for mAccount.
 770      */
 771     private void updateToken() {
 772         Bundle response = new Bundle();
 773         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 774         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 775         boolean isOAuth = mOAuth2Check.isChecked();
 776         if (isOAuth) {
 777             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 778             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 779             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 780         } else {
 781             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 782             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 783         }
 784         setAccountAuthenticatorResult(response);
 785     }
 786
 787
 788     /**
 789      * Creates a new account through the Account Authenticator that started this activity.
 790      *
 791      * This makes the account permanent.
 792      *
 793      * TODO Decide how to name the OAuth accounts
 794      */
 795     private void createAccount() {
 796         /// create and save new ownCloud account
 797         boolean isOAuth = mOAuth2Check.isChecked();
 798
 799         Uri uri = Uri.parse(mHostBaseUrl);
 800         String username = mUsernameInput.getText().toString().trim();
 801         if (isOAuth) {
 802             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 803         }
 804         String accountName = username + "@" + uri.getHost();
 805         if (uri.getPort() >= 0) {
 806             accountName += ":" + uri.getPort();
 807         }
 808         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 809         if (isOAuth) {
 810             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 811         } else {
 812             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 813         }
 814
 815         /// add the new account as default in preferences, if there is none already
 816         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 817         if (defaultAccount == null) {
 818             SharedPreferences.Editor editor = PreferenceManager
 819                     .getDefaultSharedPreferences(this).edit();
 820             editor.putString("select_oc_account", accountName);
 821             editor.commit();
 822         }
 823
 824         /// prepare result to return to the Authenticator
 825         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 826         final Intent intent = new Intent();
 827         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 828         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 829         if (!isOAuth)
 830             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 831         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 832         if (isOAuth) {
 833             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 834         }
 835         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 836         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 837         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 838         if (isOAuth)
 839             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 840
 841         setAccountAuthenticatorResult(intent.getExtras());
 842         setResult(RESULT_OK, intent);
 843
 844         /// immediately request for the synchronization of the new account
 845         Bundle bundle = new Bundle();
 846         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 847         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 848     }
 849
 850
 851     /**
 852      * {@inheritDoc}
 853      *
 854      * Necessary to update the contents of the SSL Dialog
 855      *
 856      * TODO move to some common place for all possible untrusted SSL failures
 857      */
 858     @Override
 859     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 860         switch (id) {
 861         case DIALOG_LOGIN_PROGRESS:
 862         case DIALOG_CERT_NOT_SAVED:
 863         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 864             break;
 865         case DIALOG_SSL_VALIDATOR: {
 866             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 867             break;
 868         }
 869         default:
 870             Log.e(TAG, "Incorrect dialog called with id = " + id);
 871         }
 872     }
 873
 874
 875     /**
 876      * {@inheritDoc}
 877      */
 878     @Override
 879     protected Dialog onCreateDialog(int id) {
 880         Dialog dialog = null;
 881         switch (id) {
 882         case DIALOG_LOGIN_PROGRESS: {
 883             /// simple progress dialog
 884             ProgressDialog working_dialog = new ProgressDialog(this);
 885             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 886             working_dialog.setIndeterminate(true);
 887             working_dialog.setCancelable(true);
 888             working_dialog
 889                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 890                         @Override
 891                         public void onCancel(DialogInterface dialog) {
 892                             /// TODO study if this is enough
 893                             Log.i(TAG, "Login canceled");
 894                             if (mOperationThread != null) {
 895                                 mOperationThread.interrupt();
 896                                 finish();
 897                             }
 898                         }
 899                     });
 900             dialog = working_dialog;
 901             break;
 902         }
 903         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
 904             ProgressDialog working_dialog = new ProgressDialog(this);
 905             working_dialog.setMessage(String.format("Getting authorization"));
 906             working_dialog.setIndeterminate(true);
 907             working_dialog.setCancelable(true);
 908             working_dialog
 909             .setOnCancelListener(new DialogInterface.OnCancelListener() {
 910                 @Override
 911                 public void onCancel(DialogInterface dialog) {
 912                     Log.i(TAG, "Login canceled");
 913                     finish();
 914                 }
 915             });
 916             dialog = working_dialog;
 917             break;
 918         }
 919         case DIALOG_SSL_VALIDATOR: {
 920             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
 921             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
 922             break;
 923         }
 924         case DIALOG_CERT_NOT_SAVED: {
 925             AlertDialog.Builder builder = new AlertDialog.Builder(this);
 926             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
 927             builder.setCancelable(false);
 928             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
 929                     @Override
 930                     public void onClick(DialogInterface dialog, int which) {
 931                         dialog.dismiss();
 932                     };
 933                 });
 934             dialog = builder.create();
 935             break;
 936         }
 937         default:
 938             Log.e(TAG, "Incorrect dialog called with id = " + id);
 939         }
 940         return dialog;
 941     }
 942
 943
 944     /**
 945      * Starts and activity to open the 'new account' page in the ownCloud web site
 946      *
 947      * @param view      'Account register' button
 948      */
 949     public void onRegisterClick(View view) {
 950         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
 951         setResult(RESULT_CANCELED);
 952         startActivity(register);
 953     }
 954
 955
 956     /**
 957      * Updates the content and visibility state of the icon and text associated
 958      * to the last check on the ownCloud server.
 959      */
 960     private void updateConnStatus() {
 961         ImageView iv = (ImageView) findViewById(R.id.action_indicator);
 962         TextView tv = (TextView) findViewById(R.id.status_text);
 963
 964         if (mStatusIcon == 0 && mStatusText == 0) {
 965             iv.setVisibility(View.INVISIBLE);
 966             tv.setVisibility(View.INVISIBLE);
 967         } else {
 968             iv.setImageResource(mStatusIcon);
 969             tv.setText(mStatusText);
 970             iv.setVisibility(View.VISIBLE);
 971             tv.setVisibility(View.VISIBLE);
 972         }
 973     }
 974
 975
 976     /**
 977      * Updates the content and visibility state of the icon and text associated
 978      * to the interactions with the OAuth authorization server.
 979      */
 980     private void updateAuthStatus() {
 981         if (mStatusIcon == 0 && mStatusText == 0) {
 982             mAuthStatusLayout.setVisibility(View.INVISIBLE);
 983         } else {
 984             mAuthStatusLayout.setText(mStatusText);
 985             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mStatusIcon, 0, 0, 0);
 986             mAuthStatusLayout.setVisibility(View.VISIBLE);
 987         }
 988     }
 989
 990
 991     /**
 992      * Called when the refresh button in the input field for ownCloud host is clicked.
 993      *
 994      * Performs a new check on the URL in the input field.
 995      *
 996      * @param view      Refresh 'button'
 997      */
 998     public void onRefreshClick(View view) {
 999         onFocusChange(mRefreshButton, false);
1000     }
1001
1002
1003     /**
1004      * Called when the eye icon in the password field is clicked.
1005      *
1006      * Toggles the visibility of the password in the field.
1007      *
1008      * @param view      'View password' 'button'
1009      */
1010     public void onViewPasswordClick(View view) {
1011         int selectionStart = mPasswordInput.getSelectionStart();
1012         int selectionEnd = mPasswordInput.getSelectionEnd();
1013         int input_type = mPasswordInput.getInputType();
1014         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1015             input_type = InputType.TYPE_CLASS_TEXT
1016                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1017         } else {
1018             input_type = InputType.TYPE_CLASS_TEXT
1019                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1020         }
1021         mPasswordInput.setInputType(input_type);
1022         mPasswordInput.setSelection(selectionStart, selectionEnd);
1023     }
1024
1025
1026     /**
1027      * Called when the checkbox for OAuth authorization is clicked.
1028      *
1029      * Hides or shows the input fields for user & password.
1030      *
1031      * @param view      'View password' 'button'
1032      */
1033     public void onCheckClick(View view) {
1034         CheckBox oAuth2Check = (CheckBox)view;
1035         changeViewByOAuth2Check(oAuth2Check.isChecked());
1036
1037     }
1038
1039     /**
1040      * Changes the visibility of input elements depending upon the kind of authorization
1041      * chosen by the user: basic or OAuth
1042      *
1043      * @param checked       'True' when OAuth is selected.
1044      */
1045     public void changeViewByOAuth2Check(Boolean checked) {
1046
1047         if (checked) {
1048             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1049             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1050             mUsernameInput.setVisibility(View.GONE);
1051             mPasswordInput.setVisibility(View.GONE);
1052             mViewPasswordButton.setVisibility(View.GONE);
1053         } else {
1054             mOAuthAuthEndpointText.setVisibility(View.GONE);
1055             mOAuthTokenEndpointText.setVisibility(View.GONE);
1056             mUsernameInput.setVisibility(View.VISIBLE);
1057             mPasswordInput.setVisibility(View.VISIBLE);
1058             mViewPasswordButton.setVisibility(View.INVISIBLE);
1059         }
1060
1061     }
1062
1063     /**
1064      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1065      */
1066     public void onSavedCertificate() {
1067         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1068     }
1069
1070     /**
1071      * Called from SslValidatorDialog when a new server certificate could not be saved
1072      * when the user requested it.
1073      */
1074     @Override
1075     public void onFailedSavingCertificate() {
1076         showDialog(DIALOG_CERT_NOT_SAVED);
1077     }
1078
1079 }