Add a requests activity. https://redmine.stoutner.com/issues/170
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / dialogs / SslCertificateErrorDialog.java
1 /*
2  * Copyright © 2016-2018 Soren Stoutner <soren@stoutner.com>.
3  *
4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
5  *
6  * Privacy Browser is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * Privacy Browser is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 package com.stoutner.privacybrowser.dialogs;
21
22 import android.annotation.SuppressLint;
23 import android.app.AlertDialog;
24 import android.app.Dialog;
25 import android.content.Context;
26 import android.content.DialogInterface;
27 import android.net.http.SslCertificate;
28 import android.net.http.SslError;
29 import android.os.Bundle;
30 import android.support.annotation.NonNull;
31 // `AppCompatDialogFragment` is used instead of `DialogFragment` to avoid an error on API <=22.
32 import android.support.v7.app.AppCompatDialogFragment;
33 import android.text.SpannableStringBuilder;
34 import android.text.Spanned;
35 import android.text.style.ForegroundColorSpan;
36 import android.view.LayoutInflater;
37 import android.view.WindowManager;
38 import android.widget.TextView;
39
40 import com.stoutner.privacybrowser.R;
41 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
42
43 import java.text.DateFormat;
44 import java.util.Date;
45
46 public class SslCertificateErrorDialog extends AppCompatDialogFragment {
47     // `sslCertificateErrorListener` is used in `onAttach` and `onCreateDialog`.
48     private SslCertificateErrorListener sslCertificateErrorListener;
49
50     // The public interface is used to send information back to the parent activity.
51     public interface SslCertificateErrorListener {
52         void onSslErrorCancel();
53
54         void onSslErrorProceed();
55     }
56
57     public void onAttach(Context context) {
58         // Run the default commands.
59         super.onAttach(context);
60
61         // Get a handle for `SslCertificateErrorListener` from the launching context.
62         sslCertificateErrorListener = (SslCertificateErrorListener) context;
63     }
64
65     public static SslCertificateErrorDialog displayDialog(SslError error) {
66         // Get the various components of the SSL error message.
67         int primaryErrorIntForBundle = error.getPrimaryError();
68         String urlWithErrorForBundle = error.getUrl();
69         SslCertificate sslCertificate = error.getCertificate();
70         String issuedToCNameForBundle = sslCertificate.getIssuedTo().getCName();
71         String issuedToONameForBundle = sslCertificate.getIssuedTo().getOName();
72         String issuedToUNameForBundle = sslCertificate.getIssuedTo().getUName();
73         String issuedByCNameForBundle = sslCertificate.getIssuedBy().getCName();
74         String issuedByONameForBundle = sslCertificate.getIssuedBy().getOName();
75         String issuedByUNameForBundle = sslCertificate.getIssuedBy().getUName();
76         Date startDateForBundle = sslCertificate.getValidNotBeforeDate();
77         Date endDateForBundle = sslCertificate.getValidNotAfterDate();
78
79         // Store the SSL error message components in a `Bundle`.
80         Bundle argumentsBundle = new Bundle();
81         argumentsBundle.putInt("PrimaryErrorInt", primaryErrorIntForBundle);
82         argumentsBundle.putString("UrlWithError", urlWithErrorForBundle);
83         argumentsBundle.putString("IssuedToCName", issuedToCNameForBundle);
84         argumentsBundle.putString("IssuedToOName", issuedToONameForBundle);
85         argumentsBundle.putString("IssuedToUName", issuedToUNameForBundle);
86         argumentsBundle.putString("IssuedByCName", issuedByCNameForBundle);
87         argumentsBundle.putString("IssuedByOName", issuedByONameForBundle);
88         argumentsBundle.putString("IssuedByUName", issuedByUNameForBundle);
89         argumentsBundle.putString("StartDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDateForBundle));
90         argumentsBundle.putString("EndDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDateForBundle));
91
92         // Add `argumentsBundle` to this instance of `SslCertificateErrorDialog`.
93         SslCertificateErrorDialog thisSslCertificateErrorDialog = new SslCertificateErrorDialog();
94         thisSslCertificateErrorDialog.setArguments(argumentsBundle);
95         return thisSslCertificateErrorDialog;
96     }
97
98     // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
99     @SuppressLint("InflateParams")
100     @SuppressWarnings("deprecation")
101     @Override
102     @NonNull
103     public Dialog onCreateDialog(Bundle savedInstanceState) {
104         // Remove the incorrect lint warning that `getArguments()` might be null.
105         assert getArguments() != null;
106
107         // Get the components of the SSL error message from the bundle.
108         int primaryErrorInt = getArguments().getInt("PrimaryErrorInt");
109         String urlWithError = getArguments().getString("UrlWithError");
110         String issuedToCName = getArguments().getString("IssuedToCName");
111         String issuedToOName = getArguments().getString("IssuedToOName");
112         String issuedToUName = getArguments().getString("IssuedToUName");
113         String issuedByCName = getArguments().getString("IssuedByCName");
114         String issuedByOName = getArguments().getString("IssuedByOName");
115         String issuedByUName = getArguments().getString("IssuedByUName");
116         String startDate = getArguments().getString("StartDate");
117         String endDate = getArguments().getString("EndDate");
118
119         // Remove the incorrect lint warning that `getActivity()` might be null.
120         assert getActivity() != null;
121
122         // Get the activity's layout inflater.
123         LayoutInflater layoutInflater = getActivity().getLayoutInflater();
124
125         // Use an alert dialog builder to create the alert dialog.
126         AlertDialog.Builder dialogBuilder;
127
128         // Set the style and icon according to the theme.
129         if (MainWebViewActivity.darkTheme) {
130             // Set the style.
131             dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
132
133             // Set the icon.
134             dialogBuilder.setIcon(R.drawable.ssl_certificate_enabled_dark);
135         } else {
136             // Set the style.
137             dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
138
139             // Set the icon.
140             dialogBuilder.setIcon(R.drawable.ssl_certificate_enabled_light);
141         }
142
143         // Set the title.
144         dialogBuilder.setTitle(R.string.ssl_certificate_error);
145
146         // Set the view.  The parent view is `null` because it will be assigned by `AlertDialog`.
147         dialogBuilder.setView(layoutInflater.inflate(R.layout.ssl_certificate_error, null));
148
149         // Set a listener on the negative button.
150         dialogBuilder.setNegativeButton(R.string.cancel, (DialogInterface dialog, int which) -> sslCertificateErrorListener.onSslErrorCancel());
151
152         // Set a listener on the positive button.
153         dialogBuilder.setPositiveButton(R.string.proceed, (DialogInterface dialog, int which) -> sslCertificateErrorListener.onSslErrorProceed());
154
155
156         // Create an alert dialog from the alert dialog builder.
157         AlertDialog alertDialog = dialogBuilder.create();
158
159         // Disable screenshots if not allowed.
160         if (!MainWebViewActivity.allowScreenshots) {
161             // Remove the warning below that `getWindow()` might be null.
162             assert alertDialog.getWindow() != null;
163
164             // Disable screenshots.
165             alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
166         }
167
168         // We have to show the alert dialog before we can modify the content.
169         alertDialog.show();
170
171         // Get handles for the `TextViews`
172         TextView primaryErrorTextView = alertDialog.findViewById(R.id.primary_error);
173         TextView urlTextView = alertDialog.findViewById(R.id.url_error_dialog);
174         TextView issuedToCNameTextView = alertDialog.findViewById(R.id.issued_to_cname_error_dialog);
175         TextView issuedToONameTextView = alertDialog.findViewById(R.id.issued_to_oname_error_dialog);
176         TextView issuedToUNameTextView = alertDialog.findViewById(R.id.issued_to_uname_error_dialog);
177         TextView issuedByTextView = alertDialog.findViewById(R.id.issued_by_textview);
178         TextView issuedByCNameTextView = alertDialog.findViewById(R.id.issued_by_cname_error_dialog);
179         TextView issuedByONameTextView = alertDialog.findViewById(R.id.issued_by_oname_error_dialog);
180         TextView issuedByUNameTextView = alertDialog.findViewById(R.id.issued_by_uname_error_dialog);
181         TextView validDatesTextView = alertDialog.findViewById(R.id.valid_dates_textview);
182         TextView startDateTextView = alertDialog.findViewById(R.id.start_date_error_dialog);
183         TextView endDateTextView = alertDialog.findViewById(R.id.end_date_error_dialog);
184
185         // Setup the common strings.
186         String urlLabel = getString(R.string.url_label) + "  ";
187         String cNameLabel = getString(R.string.common_name) + "  ";
188         String oNameLabel = getString(R.string.organization) + "  ";
189         String uNameLabel = getString(R.string.organizational_unit) + "  ";
190         String startDateLabel = getString(R.string.start_date) + "  ";
191         String endDateLabel = getString(R.string.end_date) + "  ";
192
193         // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
194         SpannableStringBuilder urlStringBuilder = new SpannableStringBuilder(urlLabel + urlWithError);
195         SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCName);
196         SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToOName);
197         SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUName);
198         SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCName);
199         SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByOName);
200         SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUName);
201         SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + startDate);
202         SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder((endDateLabel + endDate));
203
204         // Create a red `ForegroundColorSpan`.  We have to use the deprecated `getColor` until API >= 23.
205         @SuppressWarnings("deprecation") ForegroundColorSpan redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
206
207         // Create a blue `ForegroundColorSpan`.
208         ForegroundColorSpan blueColorSpan;
209
210         // Set `blueColorSpan` according to the theme.  We have to use the deprecated `getColor()` until API >= 23.
211         if (MainWebViewActivity.darkTheme) {
212             //noinspection deprecation
213             blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
214         } else {
215             //noinspection deprecation
216             blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
217         }
218
219         // Setup the spans to display the certificate information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
220         urlStringBuilder.setSpan(blueColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
221         issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
222         issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
223         issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
224         issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
225         issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
226         issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
227         startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
228         endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229
230         // Initialize `primaryErrorString`.
231         String primaryErrorString = "";
232
233         // Highlight the primary error in red and store the primary error string in `primaryErrorString`.
234         switch (primaryErrorInt) {
235             case SslError.SSL_IDMISMATCH:
236                 // Change the URL span colors to red.
237                 urlStringBuilder.setSpan(redColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
238                 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
239
240                 // Store the primary error string.
241                 primaryErrorString = getString(R.string.cn_mismatch);
242                 break;
243
244             case SslError.SSL_UNTRUSTED:
245                 // Change the `issuesByTextView` text to red.  We have to use the deprecated `getColor()` until API >= 23.
246                 issuedByTextView.setTextColor(getResources().getColor(R.color.red_a700));
247
248                 // Change the issued by span color to red.
249                 issuedByCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
250                 issuedByONameStringBuilder.setSpan(redColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
251                 issuedByUNameStringBuilder.setSpan(redColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
252
253                 // Store the primary error string.
254                 primaryErrorString = getString(R.string.untrusted);
255                 break;
256
257             case SslError.SSL_DATE_INVALID:
258                 // Change the `validDatesTextView` text to red.  We have to use the deprecated `getColor()` until API >= 23.
259                 validDatesTextView.setTextColor(getResources().getColor(R.color.red_a700));
260
261                 // Change the date span colors to red.
262                 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
263                 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
264
265                 // Store the primary error string.
266                 primaryErrorString = getString(R.string.invalid_date);
267                 break;
268
269             case SslError.SSL_NOTYETVALID:
270                 // Change the start date span color to red.
271                 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
272
273                 // Store the primary error string.
274                 primaryErrorString = getString(R.string.future_certificate);
275                 break;
276
277             case SslError.SSL_EXPIRED:
278                 // Change the end date span color to red.
279                 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
280
281                 // Store the primary error string.
282                 primaryErrorString = getString(R.string.expired_certificate);
283                 break;
284
285             case SslError.SSL_INVALID:
286                 // Store the primary error string.
287                 primaryErrorString = getString(R.string.invalid_certificate);
288                 break;
289         }
290
291
292         // Display the strings.
293         primaryErrorTextView.setText(primaryErrorString);
294         urlTextView.setText(urlStringBuilder);
295         issuedToCNameTextView.setText(issuedToCNameStringBuilder);
296         issuedToONameTextView.setText(issuedToONameStringBuilder);
297         issuedToUNameTextView.setText(issuedToUNameStringBuilder);
298         issuedByCNameTextView.setText(issuedByCNameStringBuilder);
299         issuedByONameTextView.setText(issuedByONameStringBuilder);
300         issuedByUNameTextView.setText(issuedByUNameStringBuilder);
301         startDateTextView.setText(startDateStringBuilder);
302         endDateTextView.setText(endDateStringBuilder);
303
304         // `onCreateDialog` requires the return of an `AlertDialog`.
305         return alertDialog;
306     }
307 }