aboutsummaryrefslogtreecommitdiffstats
path: root/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/AddEditKeyserverDialogFragment.java
blob: 3d96f3c6d5fe7c983e561f819ab041cdc7639cde (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
/*
 * Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
 *
 * 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 org.sufficientlysecure.keychain.ui.dialog;


import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;

import android.app.Activity;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;

import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;

import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.keyimport.HkpKeyserver;
import org.sufficientlysecure.keychain.ui.util.Notify;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.Preferences;
import org.sufficientlysecure.keychain.util.TlsHelper;
import org.sufficientlysecure.keychain.util.orbot.OrbotHelper;

import java.net.Proxy;

public class AddEditKeyserverDialogFragment extends DialogFragment implements OnEditorActionListener {
    private static final String ARG_MESSENGER = "arg_messenger";
    private static final String ARG_ACTION = "arg_dialog_action";
    private static final String ARG_POSITION = "arg_position";
    private static final String ARG_KEYSERVER = "arg_keyserver";

    public static final int MESSAGE_OKAY = 1;

    public static final String MESSAGE_KEYSERVER = "new_keyserver";
    public static final String MESSAGE_VERIFIED = "verified";
    public static final String MESSAGE_KEYSERVER_DELETED = "keyserver_deleted";
    public static final String MESSAGE_DIALOG_ACTION = "message_dialog_action";
    public static final String MESSAGE_EDIT_POSITION = "keyserver_edited_position";

    private Messenger mMessenger;
    private DialogAction mDialogAction;
    private int mPosition;

    private EditText mKeyserverEditText;
    private TextInputLayout mKeyserverEditTextLayout;
    private CheckBox mVerifyKeyserverCheckBox;
    private CheckBox mOnlyTrustedKeyserverCheckBox;

    public enum DialogAction {
        ADD,
        EDIT
    }

    public enum FailureReason {
        INVALID_URL,
        CONNECTION_FAILED,
        NO_PINNED_CERTIFICATE
    }

    public static AddEditKeyserverDialogFragment newInstance(Messenger messenger,
                                                             DialogAction action,
                                                             String keyserver,
                                                             int position) {
        AddEditKeyserverDialogFragment frag = new AddEditKeyserverDialogFragment();
        Bundle args = new Bundle();
        args.putParcelable(ARG_MESSENGER, messenger);
        args.putSerializable(ARG_ACTION, action);
        args.putString(ARG_KEYSERVER, keyserver);
        args.putInt(ARG_POSITION, position);

        frag.setArguments(args);

        return frag;
    }

    @NonNull
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        final Activity activity = getActivity();

        mMessenger = getArguments().getParcelable(ARG_MESSENGER);
        mDialogAction = (DialogAction) getArguments().getSerializable(ARG_ACTION);
        mPosition = getArguments().getInt(ARG_POSITION);

        CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);

        LayoutInflater inflater = activity.getLayoutInflater();
        View view = inflater.inflate(R.layout.add_keyserver_dialog, null);
        alert.setView(view);

        mKeyserverEditText = (EditText) view.findViewById(R.id.keyserver_url_edit_text);
        mKeyserverEditTextLayout = (TextInputLayout) view.findViewById(R.id.keyserver_url_edit_text_layout);
        mVerifyKeyserverCheckBox = (CheckBox) view.findViewById(R.id.verify_connection_checkbox);
        mOnlyTrustedKeyserverCheckBox = (CheckBox) view.findViewById(R.id.only_trusted_keyserver_checkbox);
        mVerifyKeyserverCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                mOnlyTrustedKeyserverCheckBox.setEnabled(isChecked);
            }
        });

        switch (mDialogAction) {
            case ADD: {
                alert.setTitle(R.string.add_keyserver_dialog_title);
                break;
            }
            case EDIT: {
                alert.setTitle(R.string.edit_keyserver_dialog_title);
                mKeyserverEditText.setText(getArguments().getString(ARG_KEYSERVER));
                break;
            }
        }

        // we don't want dialog to be dismissed on click for keyserver addition or edit,
        // thereby requiring the hack seen below and in onStart
        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {
                // we need to have an empty listener to prevent errors on some devices as mentioned
                // at http://stackoverflow.com/q/13746412/3000919
                // actual listener set in onStart for adding keyservers or editing them
            }
        });

        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int id) {
                dismiss();
            }
        });

        switch (mDialogAction) {
            case EDIT: {
                alert.setNeutralButton(R.string.label_keyserver_dialog_delete,
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                deleteKeyserver(mPosition);
                            }
                        });
                break;
            }
            case ADD: {
                // do nothing
                break;
            }
        }

        // Hack to open keyboard.
        // This is the only method that I found to work across all Android versions
        // http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
        // Notes: * onCreateView can't be used because we want to add buttons to the dialog
        //        * opening in onActivityCreated does not work on Android 4.4
        mKeyserverEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                mKeyserverEditText.post(new Runnable() {
                    @Override
                    public void run() {
                        InputMethodManager imm = (InputMethodManager) getActivity()
                                .getSystemService(Context.INPUT_METHOD_SERVICE);
                        imm.showSoftInput(mKeyserverEditText, InputMethodManager.SHOW_IMPLICIT);
                    }
                });
            }
        });
        mKeyserverEditText.requestFocus();

        mKeyserverEditText.setImeActionLabel(getString(android.R.string.ok),
                EditorInfo.IME_ACTION_DONE);
        mKeyserverEditText.setOnEditorActionListener(this);

        return alert.show();
    }

    @Override
    public void onStart() {
        super.onStart();
        AlertDialog addKeyserverDialog = (AlertDialog) getDialog();
        if (addKeyserverDialog != null) {
            Button positiveButton = addKeyserverDialog.getButton(Dialog.BUTTON_POSITIVE);
            positiveButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mKeyserverEditTextLayout.setErrorEnabled(false);

                    // behaviour same for edit and add
                    final String keyserverUrl = mKeyserverEditText.getText().toString();
                    if (mVerifyKeyserverCheckBox.isChecked()) {
                        final Preferences.ProxyPrefs proxyPrefs = Preferences.getPreferences(getActivity())
                                .getProxyPrefs();
                        OrbotHelper.DialogActions dialogActions = new OrbotHelper.DialogActions() {
                            @Override
                            public void onOrbotStarted() {
                                verifyConnection(
                                        keyserverUrl,
                                        proxyPrefs.parcelableProxy.getProxy(),
                                        mOnlyTrustedKeyserverCheckBox.isChecked()
                                );
                            }

                            @Override
                            public void onNeutralButton() {
                                verifyConnection(
                                        keyserverUrl,
                                        null,
                                        mOnlyTrustedKeyserverCheckBox.isChecked()
                                );
                            }

                            @Override
                            public void onCancel() {
                                // do nothing
                            }
                        };

                        if (OrbotHelper.putOrbotInRequiredState(dialogActions, getActivity())) {
                            verifyConnection(
                                    keyserverUrl,
                                    proxyPrefs.parcelableProxy.getProxy(),
                                    mOnlyTrustedKeyserverCheckBox.isChecked()
                            );
                        }
                    } else {
                        dismiss();
                        // return unverified keyserver back to activity
                        keyserverEdited(keyserverUrl, false);
                    }
                }
            });
        }
    }

    public void keyserverEdited(String keyserver, boolean verified) {
        dismiss();
        Bundle data = new Bundle();
        data.putSerializable(MESSAGE_DIALOG_ACTION, mDialogAction);
        data.putString(MESSAGE_KEYSERVER, keyserver);
        data.putBoolean(MESSAGE_VERIFIED, verified);

        if (mDialogAction == DialogAction.EDIT) {
            data.putInt(MESSAGE_EDIT_POSITION, mPosition);
        }

        sendMessageToHandler(MESSAGE_OKAY, data);
    }

    public void deleteKeyserver(int position) {
        dismiss();
        Bundle data = new Bundle();
        data.putSerializable(MESSAGE_DIALOG_ACTION, DialogAction.EDIT);
        data.putInt(MESSAGE_EDIT_POSITION, position);
        data.putBoolean(MESSAGE_KEYSERVER_DELETED, true);

        sendMessageToHandler(MESSAGE_OKAY, data);
    }

    public void verificationFailed(FailureReason failureReason) {
        switch (failureReason) {
            case CONNECTION_FAILED: {
                mKeyserverEditTextLayout.setError(
                        getString(R.string.add_keyserver_connection_failed));
                break;
            }
            case INVALID_URL: {
                mKeyserverEditTextLayout.setError(
                        getString(R.string.add_keyserver_invalid_url));
                break;
            }
            case NO_PINNED_CERTIFICATE: {
                mKeyserverEditTextLayout.setError(
                        getString(R.string.add_keyserver_keyserver_not_trusted));
                break;
            }
        }

    }

    public void verifyConnection(String keyserver, final Proxy proxy, final boolean onlyTrustedKeyserver) {

        new AsyncTask<String, Void, FailureReason>() {
            ProgressDialog mProgressDialog;
            String mKeyserver;

            @Override
            protected void onPreExecute() {
                mProgressDialog = new ProgressDialog(getActivity());
                mProgressDialog.setMessage(getString(R.string.progress_verifying_keyserver_connection));
                mProgressDialog.setCancelable(false);
                mProgressDialog.show();
            }

            @Override
            protected FailureReason doInBackground(String... keyservers) {
                mKeyserver = keyservers[0];
                FailureReason reason = null;
                try {
                    // replace hkps/hkp scheme and reconstruct Uri
                    Uri keyserverUri = Uri.parse(mKeyserver);
                    String scheme = keyserverUri.getScheme();
                    String schemeSpecificPart = keyserverUri.getSchemeSpecificPart();
                    String fragment = keyserverUri.getFragment();
                    if (scheme == null) {
                        throw new MalformedURLException();
                    }
                    if ("hkps".equalsIgnoreCase(scheme)) {
                        scheme = "https";
                    } else if ("hkp".equalsIgnoreCase(scheme)) {
                        scheme = "http";
                    }
                    URI newKeyserver = new URI(scheme, schemeSpecificPart, fragment);

                    Log.d("Converted URL", newKeyserver.toString());

                    OkHttpClient client = HkpKeyserver.getClient(newKeyserver.toURL(), proxy);

                    // don't follow any redirects
                    client.setFollowRedirects(false);
                    client.setFollowSslRedirects(false);

                    if (onlyTrustedKeyserver
                            && !TlsHelper.usePinnedCertificateIfAvailable(client, newKeyserver.toURL())) {
                        Log.w(Constants.TAG, "No pinned certificate for this host in OpenKeychain's assets.");
                        reason = FailureReason.NO_PINNED_CERTIFICATE;
                        return reason;
                    }

                    client.newCall(new Request.Builder().url(newKeyserver.toURL()).build()).execute();
                } catch (TlsHelper.TlsHelperException e) {
                    reason = FailureReason.CONNECTION_FAILED;
                } catch (MalformedURLException | URISyntaxException e) {
                    Log.w(Constants.TAG, "Invalid keyserver URL entered by user.");
                    reason = FailureReason.INVALID_URL;
                } catch (IOException e) {
                    Log.w(Constants.TAG, "Could not connect to entered keyserver url");
                    reason = FailureReason.CONNECTION_FAILED;
                }
                return reason;
            }

            @Override
            protected void onPostExecute(FailureReason failureReason) {
                mProgressDialog.dismiss();
                if (failureReason == null) {
                    keyserverEdited(mKeyserver, true);
                } else {
                    verificationFailed(failureReason);
                }
            }
        }.execute(keyserver);
    }

    @Override
    public void onDismiss(DialogInterface dialog) {
        super.onDismiss(dialog);

        // hide keyboard on dismiss
        hideKeyboard();
    }

    private void hideKeyboard() {
        if (getActivity() == null) {
            return;
        }
        InputMethodManager inputManager = (InputMethodManager) getActivity()
                .getSystemService(Context.INPUT_METHOD_SERVICE);

        //check if no view has focus:
        View v = getActivity().getCurrentFocus();
        if (v == null)
            return;

        inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
    }

    /**
     * Associate the "done" button on the soft keyboard with the okay button in the view
     */
    @Override
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
        if (EditorInfo.IME_ACTION_DONE == actionId) {
            AlertDialog dialog = ((AlertDialog) getDialog());
            Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);

            bt.performClick();
            return true;
        }
        return false;
    }

    /**
     * Send message back to handler which is initialized in a activity
     *
     * @param what Message integer you want to send
     */
    private void sendMessageToHandler(Integer what, Bundle data) {
        Message msg = Message.obtain();
        msg.what = what;
        if (data != null) {
            msg.setData(data);
        }

        try {
            mMessenger.send(msg);
        } catch (RemoteException e) {
            Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
        } catch (NullPointerException e) {
            Log.w(Constants.TAG, "Messenger is null!", e);
        }
    }
}