2 * Copyright © 2016-2017 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
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.
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.
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/>.
20 package com.stoutner.privacybrowser.dialogs;
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 // We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced 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.widget.TextView;
39 import com.stoutner.privacybrowser.R;
40 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
42 import java.text.DateFormat;
43 import java.util.Date;
45 public class SslCertificateErrorDialog extends AppCompatDialogFragment {
47 private int primaryErrorInt;
48 private String urlWithError;
49 private String issuedToCName;
50 private String issuedToOName;
51 private String issuedToUName;
52 private String issuedByCName;
53 private String issuedByOName;
54 private String issuedByUName;
55 private String startDate;
56 private String endDate;
58 public static SslCertificateErrorDialog displayDialog(SslError error) {
59 // Get the various components of the SSL error message.
60 int primaryErrorIntForBundle = error.getPrimaryError();
61 String urlWithErrorForBundle = error.getUrl();
62 SslCertificate sslCertificate = error.getCertificate();
63 String issuedToCNameForBundle = sslCertificate.getIssuedTo().getCName();
64 String issuedToONameForBundle = sslCertificate.getIssuedTo().getOName();
65 String issuedToUNameForBundle = sslCertificate.getIssuedTo().getUName();
66 String issuedByCNameForBundle = sslCertificate.getIssuedBy().getCName();
67 String issuedByONameForBundle = sslCertificate.getIssuedBy().getOName();
68 String issuedByUNameForBundle = sslCertificate.getIssuedBy().getUName();
69 Date startDateForBundle = sslCertificate.getValidNotBeforeDate();
70 Date endDateForBundle = sslCertificate.getValidNotAfterDate();
72 // Store the SSL error message components in a `Bundle`.
73 Bundle argumentsBundle = new Bundle();
74 argumentsBundle.putInt("PrimaryErrorInt", primaryErrorIntForBundle);
75 argumentsBundle.putString("UrlWithError", urlWithErrorForBundle);
76 argumentsBundle.putString("IssuedToCName", issuedToCNameForBundle);
77 argumentsBundle.putString("IssuedToOName", issuedToONameForBundle);
78 argumentsBundle.putString("IssuedToUName", issuedToUNameForBundle);
79 argumentsBundle.putString("IssuedByCName", issuedByCNameForBundle);
80 argumentsBundle.putString("IssuedByOName", issuedByONameForBundle);
81 argumentsBundle.putString("IssuedByUName", issuedByUNameForBundle);
82 argumentsBundle.putString("StartDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDateForBundle));
83 argumentsBundle.putString("EndDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDateForBundle));
85 // Add `argumentsBundle` to this instance of `SslCertificateErrorDialog`.
86 SslCertificateErrorDialog thisSslCertificateErrorDialog = new SslCertificateErrorDialog();
87 thisSslCertificateErrorDialog.setArguments(argumentsBundle);
88 return thisSslCertificateErrorDialog;
92 public void onCreate(Bundle savedInstanceState) {
93 super.onCreate(savedInstanceState);
95 // Save the components of the SSL error message in class variables.
96 primaryErrorInt = getArguments().getInt("PrimaryErrorInt");
97 urlWithError = getArguments().getString("UrlWithError");
98 issuedToCName = getArguments().getString("IssuedToCName");
99 issuedToOName = getArguments().getString("IssuedToOName");
100 issuedToUName = getArguments().getString("IssuedToUName");
101 issuedByCName = getArguments().getString("IssuedByCName");
102 issuedByOName = getArguments().getString("IssuedByOName");
103 issuedByUName = getArguments().getString("IssuedByUName");
104 startDate = getArguments().getString("StartDate");
105 endDate = getArguments().getString("EndDate");
108 // The public interface is used to send information back to the parent activity.
109 public interface SslCertificateErrorListener {
110 void onSslErrorCancel();
112 void onSslErrorProceed();
115 // `sslCertificateErrorListener` is used in `onAttach` and `onCreateDialog`.
116 private SslCertificateErrorListener sslCertificateErrorListener;
118 // Check to make sure that the parent activity implements the listener.
119 public void onAttach(Context context) {
120 super.onAttach(context);
123 sslCertificateErrorListener = (SslCertificateErrorListener) context;
124 } catch(ClassCastException exception) {
125 throw new ClassCastException(context.toString() + " must implement SslCertificateErrorListener");
129 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
130 @SuppressLint("InflateParams")
131 @SuppressWarnings("deprecation")
134 public Dialog onCreateDialog(Bundle savedInstanceState) {
135 // Get the activity's layout inflater.
136 LayoutInflater layoutInflater = getActivity().getLayoutInflater();
138 // Use `AlertDialog.Builder` to create the `AlertDialog`.
139 AlertDialog.Builder dialogBuilder;
141 // Set the style according to the theme.
142 if (MainWebViewActivity.darkTheme) {
143 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
145 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
149 dialogBuilder.setTitle(R.string.ssl_certificate_error);
151 // Set the view. The parent view is `null` because it will be assigned by `AlertDialog`.
152 dialogBuilder.setView(layoutInflater.inflate(R.layout.ssl_certificate_error, null));
154 // Set an `onClick` listener on the negative button. `null` doesn't do anything extra when the button is pressed. The `Dialog` will automatically close.
155 dialogBuilder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
157 public void onClick(DialogInterface dialog, int which) {
158 sslCertificateErrorListener.onSslErrorCancel();
162 // Set an `onClick` listener on the positive button.
163 dialogBuilder.setPositiveButton(R.string.proceed, new DialogInterface.OnClickListener() {
165 public void onClick(DialogInterface dialog, int which) {
166 sslCertificateErrorListener.onSslErrorProceed();
171 // Create an `AlertDialog` from the `AlertDialog.Builder`.
172 AlertDialog alertDialog = dialogBuilder.create();
174 // We have to show the `AlertDialog` before we can modify the content.
177 // Get handles for the `TextViews`
178 TextView primaryErrorTextView = (TextView) alertDialog.findViewById(R.id.primary_error);
179 TextView urlTextView = (TextView) alertDialog.findViewById(R.id.url_error_dialog);
180 TextView issuedToCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_cname_error_dialog);
181 TextView issuedToONameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_oname_error_dialog);
182 TextView issuedToUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_uname_error_dialog);
183 TextView issuedByTextView = (TextView) alertDialog.findViewById(R.id.issued_by_textview);
184 TextView issuedByCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_cname_error_dialog);
185 TextView issuedByONameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_oname_error_dialog);
186 TextView issuedByUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_uname_error_dialog);
187 TextView validDatesTextView = (TextView) alertDialog.findViewById(R.id.valid_dates_textview);
188 TextView startDateTextView = (TextView) alertDialog.findViewById(R.id.start_date_error_dialog);
189 TextView endDateTextView = (TextView) alertDialog.findViewById(R.id.end_date_error_dialog);
191 // Setup the common strings.
192 String urlLabel = getString(R.string.url_label) + " ";
193 String cNameLabel = getString(R.string.common_name) + " ";
194 String oNameLabel = getString(R.string.organization) + " ";
195 String uNameLabel = getString(R.string.organizational_unit) + " ";
196 String startDateLabel = getString(R.string.start_date) + " ";
197 String endDateLabel = getString(R.string.end_date) + " ";
199 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
200 SpannableStringBuilder urlStringBuilder = new SpannableStringBuilder(urlLabel + urlWithError);
201 SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCName);
202 SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToOName);
203 SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUName);
204 SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCName);
205 SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByOName);
206 SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUName);
207 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + startDate);
208 SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder((endDateLabel + endDate));
210 // Create a red `ForegroundColorSpan`. We have to use the deprecated `getColor` until API >= 23.
211 @SuppressWarnings("deprecation") ForegroundColorSpan redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
213 // Create a blue `ForegroundColorSpan`.
214 ForegroundColorSpan blueColorSpan;
216 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
217 if (MainWebViewActivity.darkTheme) {
218 //noinspection deprecation
219 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
221 //noinspection deprecation
222 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
225 // Setup the spans to display the certificate information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
226 urlStringBuilder.setSpan(blueColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
227 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
228 issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
230 issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
231 issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
232 issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
233 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
234 endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
236 // Initialize `primaryErrorString`.
237 String primaryErrorString = "";
239 // Highlight the primary error in red and store the primary error string in `primaryErrorString`.
240 switch (primaryErrorInt) {
241 case SslError.SSL_IDMISMATCH:
242 // Change the URL span colors to red.
243 urlStringBuilder.setSpan(redColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
244 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
246 // Store the primary error string.
247 primaryErrorString = getString(R.string.cn_mismatch);
250 case SslError.SSL_UNTRUSTED:
251 // Change the `issuesByTextView` text to red. We have to use the deprecated `getColor()` until API >= 23.
252 issuedByTextView.setTextColor(getResources().getColor(R.color.red_a700));
254 // Change the issued by span color to red.
255 issuedByCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
256 issuedByONameStringBuilder.setSpan(redColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
257 issuedByUNameStringBuilder.setSpan(redColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
259 // Store the primary error string.
260 primaryErrorString = getString(R.string.untrusted);
263 case SslError.SSL_DATE_INVALID:
264 // Change the `validDatesTextView` text to red. We have to use the deprecated `getColor()` until API >= 23.
265 validDatesTextView.setTextColor(getResources().getColor(R.color.red_a700));
267 // Change the date span colors to red.
268 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
269 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
271 // Store the primary error string.
272 primaryErrorString = getString(R.string.invalid_date);
275 case SslError.SSL_NOTYETVALID:
276 // Change the start date span color to red.
277 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
279 // Store the primary error string.
280 primaryErrorString = getString(R.string.future_certificate);
283 case SslError.SSL_EXPIRED:
284 // Change the end date span color to red.
285 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
287 // Store the primary error string.
288 primaryErrorString = getString(R.string.expired_certificate);
291 case SslError.SSL_INVALID:
292 // Store the primary error string.
293 primaryErrorString = getString(R.string.invalid_certificate);
298 // Display the strings.
299 primaryErrorTextView.setText(primaryErrorString);
300 urlTextView.setText(urlStringBuilder);
301 issuedToCNameTextView.setText(issuedToCNameStringBuilder);
302 issuedToONameTextView.setText(issuedToONameStringBuilder);
303 issuedToUNameTextView.setText(issuedToUNameStringBuilder);
304 issuedByCNameTextView.setText(issuedByCNameStringBuilder);
305 issuedByONameTextView.setText(issuedByONameStringBuilder);
306 issuedByUNameTextView.setText(issuedByUNameStringBuilder);
307 startDateTextView.setText(startDateStringBuilder);
308 endDateTextView.setText(endDateStringBuilder);
310 // `onCreateDialog` requires the return of an `AlertDialog`.