2 * Copyright © 2016-2019 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.app.DialogFragment;
26 import android.graphics.drawable.BitmapDrawable;
27 import android.graphics.drawable.Drawable;
28 import android.net.Uri;
29 import android.net.http.SslCertificate;
30 import android.os.Bundle;
31 import android.text.SpannableStringBuilder;
32 import android.text.Spanned;
33 import android.text.style.ForegroundColorSpan;
34 import android.view.LayoutInflater;
35 import android.view.WindowManager;
36 import android.widget.TextView;
38 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
39 import com.stoutner.privacybrowser.R;
40 import java.text.DateFormat;
41 import java.util.Calendar;
42 import java.util.Date;
44 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
45 @SuppressLint("InflateParams")
46 public class ViewSslCertificateDialog extends DialogFragment {
47 public Dialog onCreateDialog(Bundle savedInstanceState) {
48 // Get the activity's layout inflater.
49 LayoutInflater layoutInflater = getActivity().getLayoutInflater();
51 // Use a builder to create the alert dialog.
52 AlertDialog.Builder dialogBuilder;
54 // Set the style according to the theme.
55 if (MainWebViewActivity.darkTheme) {
56 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
58 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
61 // Create a drawable version of the favorite icon.
62 Drawable favoriteIconDrawable = new BitmapDrawable(getResources(), MainWebViewActivity.favoriteIconBitmap);
65 dialogBuilder.setIcon(favoriteIconDrawable);
67 // Set a listener on the negative button. Using `null` as the listener closes the dialog without doing anything else.
68 dialogBuilder.setNegativeButton(R.string.close, null);
70 // Check to see if the website is encrypted.
71 if (MainWebViewActivity.sslCertificate == null) { // The website is not encrypted.
73 dialogBuilder.setTitle(R.string.unencrypted_website);
75 // Set the Layout. The parent view is `null` because it will be assigned by `AlertDialog`.
76 dialogBuilder.setView(layoutInflater.inflate(R.layout.unencrypted_website, null));
78 // Create an alert dialog from the alert dialog builder.
79 final AlertDialog alertDialog = dialogBuilder.create();
81 // Disable screenshots if not allowed.
82 if (!MainWebViewActivity.allowScreenshots) {
83 // Remove the warning below that `getWindow()` might be null.
84 assert alertDialog.getWindow() != null;
86 // Disable screenshots.
87 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
90 // `onCreateDialog` requires the return of an `AlertDialog`.
93 } else { // Display the SSL certificate information
95 dialogBuilder.setTitle(R.string.ssl_certificate);
97 // Set the layout. The parent view is `null` because it will be assigned by `AlertDialog`.
98 dialogBuilder.setView(layoutInflater.inflate(R.layout.view_ssl_certificate, null));
100 // Create an alert dialog from the builder.
101 final AlertDialog alertDialog = dialogBuilder.create();
103 // Disable screenshots if not allowed.
104 if (!MainWebViewActivity.allowScreenshots) {
105 // Remove the warning below that `getWindow()` might be null.
106 assert alertDialog.getWindow() != null;
108 // Disable screenshots.
109 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
112 // The alert dialog must be shown before items in the layout can be modified.
115 // Get handles for the text views.
116 TextView domainTextView = alertDialog.findViewById(R.id.domain);
117 TextView ipAddressesTextView = alertDialog.findViewById(R.id.ip_addresses);
118 TextView issuedToCNameTextView = alertDialog.findViewById(R.id.issued_to_cname);
119 TextView issuedToONameTextView = alertDialog.findViewById(R.id.issued_to_oname);
120 TextView issuedToUNameTextView = alertDialog.findViewById(R.id.issued_to_uname);
121 TextView issuedByCNameTextView = alertDialog.findViewById(R.id.issued_by_cname);
122 TextView issuedByONameTextView = alertDialog.findViewById(R.id.issued_by_oname);
123 TextView issuedByUNameTextView = alertDialog.findViewById(R.id.issued_by_uname);
124 TextView startDateTextView = alertDialog.findViewById(R.id.start_date);
125 TextView endDateTextView = alertDialog.findViewById(R.id.end_date);
128 String domainLabel = getString(R.string.domain_label) + " ";
129 String ipAddressesLabel = getString(R.string.ip_addresses) + " ";
130 String cNameLabel = getString(R.string.common_name) + " ";
131 String oNameLabel = getString(R.string.organization) + " ";
132 String uNameLabel = getString(R.string.organizational_unit) + " ";
133 String startDateLabel = getString(R.string.start_date) + " ";
134 String endDateLabel = getString(R.string.end_date) + " ";
136 // Convert the formatted URL string to a URI.
137 Uri uri = Uri.parse(MainWebViewActivity.formattedUrlString);
139 // Extract the domain name from the URI.
140 String domainString = uri.getHost();
142 // Get the SSL certificate.
143 SslCertificate sslCertificate = MainWebViewActivity.sslCertificate;
145 // Get the strings from the SSL certificate.
146 String issuedToCName = sslCertificate.getIssuedTo().getCName();
147 String issuedToOName = sslCertificate.getIssuedTo().getOName();
148 String issuedToUName = sslCertificate.getIssuedTo().getUName();
149 String issuedByCName = sslCertificate.getIssuedBy().getCName();
150 String issuedByOName = sslCertificate.getIssuedBy().getOName();
151 String issuedByUName = sslCertificate.getIssuedBy().getUName();
152 Date startDate = sslCertificate.getValidNotBeforeDate();
153 Date endDate = sslCertificate.getValidNotAfterDate();
155 // Create spannable string builders for each text view that needs multiple colors of text.
156 SpannableStringBuilder domainStringBuilder = new SpannableStringBuilder(domainLabel + domainString);
157 SpannableStringBuilder ipAddressesStringBuilder = new SpannableStringBuilder(ipAddressesLabel + MainWebViewActivity.currentHostIpAddresses);
158 SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCName);
159 SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToOName);
160 SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUName);
161 SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCName);
162 SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByOName);
163 SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUName);
164 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
165 SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
167 // Create a red foreground color span. The deprecated `getColor` must be used until the minimum API >= 23.
168 @SuppressWarnings("deprecation") ForegroundColorSpan redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
170 // Create a blue foreground color span.
171 ForegroundColorSpan blueColorSpan;
173 // Set the blue color span according to the theme. The deprecated `getColor()` must be used until the minimum API >= 23.
174 if (MainWebViewActivity.darkTheme) {
175 //noinspection deprecation
176 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
178 //noinspection deprecation
179 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
182 // Remove the incorrect lint error that `.equals` might produce a NullPointerException.
183 assert domainString != null;
185 // Formet the domain string and issued to CName colors.
186 if (domainString.equals(issuedToCName)) { // `domainString` and `issuedToCName` match.
187 // Set the strings to be blue.
188 domainStringBuilder.setSpan(blueColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
189 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
190 } else if(issuedToCName.startsWith("*.")){ // `issuedToCName` begins with a wildcard.
191 // Remove the initial `*.`.
192 String baseCertificateDomain = issuedToCName.substring(2);
194 // Setup a copy of `domainString` to test subdomains.
195 String domainStringSubdomain = domainString;
197 // Initialize `domainNamesMatch`.
198 boolean domainNamesMatch = false;
200 // Check all the subdomains in `domainStringSubdomain` against `baseCertificateDomain`.
201 while (!domainNamesMatch && domainStringSubdomain.contains(".")) { // Stop checking if we know that `domainNamesMatch` is `true` or if we run out of `.`.
202 // Test the `domainStringSubdomain` against `baseCertificateDomain`.
203 if (domainStringSubdomain.equals(baseCertificateDomain)) {
204 domainNamesMatch = true;
207 // Strip out the lowest subdomain of `certificateCommonNameSubdomain`.
208 domainStringSubdomain = domainStringSubdomain.substring(domainStringSubdomain.indexOf(".") + 1);
211 // Format the domain and issued to Common Name according to `domainNamesMatch`.
212 if (domainNamesMatch) { // `domainString` is a subdomain of the wildcard `issuedToCNameString`.
213 // Set the strings to be blue.
214 domainStringBuilder.setSpan(blueColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
215 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
216 } else { // `domainString` is not a subdomain of the wildcard `issuedToCNameString`.
217 // Set the string to be red.
218 domainStringBuilder.setSpan(redColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
219 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
221 } else { // The strings do not match and `issuedToCNameString` does not begin with a wildcard.
222 // Set the strings to be red.
223 domainStringBuilder.setSpan(redColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
224 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
227 // Set the IP addresses, issued to, and issued by spans to display the certificate information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
228 ipAddressesStringBuilder.setSpan(blueColorSpan, ipAddressesLabel.length(), ipAddressesStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
230 issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
231 issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
232 issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
233 issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
235 // Get the current date.
236 Date currentDate = Calendar.getInstance().getTime();
238 // Format the start date color. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
239 if (startDate.after(currentDate)) { // The certificate start date is in the future.
240 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
241 } else { // The certificate start date is in the past.
242 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
245 // Format the end date color. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
246 if (endDate.before(currentDate)) { // The certificate end date is in the past.
247 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
248 } else { // The certificate end date is in the future.
249 endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
252 // Display the strings.
253 domainTextView.setText(domainStringBuilder);
254 ipAddressesTextView.setText(ipAddressesStringBuilder);
255 issuedToCNameTextView.setText(issuedToCNameStringBuilder);
256 issuedToONameTextView.setText(issuedToONameStringBuilder);
257 issuedToUNameTextView.setText(issuedToUNameStringBuilder);
258 issuedByCNameTextView.setText(issuedByCNameStringBuilder);
259 issuedByONameTextView.setText(issuedByONameStringBuilder);
260 issuedByUNameTextView.setText(issuedByUNameStringBuilder);
261 startDateTextView.setText(startDateStringBuilder);
262 endDateTextView.setText(endDateStringBuilder);
264 // `onCreateDialog` requires the return of an alert dialog.