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.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.widget.TextView;
37 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
38 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 // Create a drawable version of the favorite icon.
52 Drawable favoriteIconDrawable = new BitmapDrawable(getResources(), MainWebViewActivity.favoriteIconBitmap);
54 // Use `AlertDialog.Builder` to create the `AlertDialog`.
55 AlertDialog.Builder dialogBuilder;
57 // Set the style according to the theme.
58 if (MainWebViewActivity.darkTheme) {
59 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
61 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
65 dialogBuilder.setIcon(favoriteIconDrawable);
67 // Set an `onClick` listener on the negative button. Using `null` 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 `AlertDialog` from the `AlertDialog.Builder`
79 final AlertDialog alertDialog = dialogBuilder.create();
81 // Show `alertDialog`.
84 // `onCreateDialog` requires the return of an `AlertDialog`.
87 } else { // Display the SSL certificate information
89 dialogBuilder.setTitle(R.string.ssl_certificate);
91 // Set the layout. The parent view is `null` because it will be assigned by `AlertDialog`.
92 dialogBuilder.setView(layoutInflater.inflate(R.layout.view_ssl_certificate, null));
94 // Create an `AlertDialog` from the `AlertDialog.Builder`
95 final AlertDialog alertDialog = dialogBuilder.create();
97 // The `AlertDialog` must be shown before items in the layout can be modified.
100 // Get handles for the `TextViews`.
101 TextView domainTextView = (TextView) alertDialog.findViewById(R.id.domain);
102 TextView issuedToCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_cname);
103 TextView issuedToONameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_oname);
104 TextView issuedToUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_uname);
105 TextView issuedByCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_cname);
106 TextView issuedByONameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_oname);
107 TextView issuedByUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_uname);
108 TextView startDateTextView = (TextView) alertDialog.findViewById(R.id.start_date);
109 TextView endDateTextView = (TextView) alertDialog.findViewById(R.id.end_date);
112 String domainLabel = getString(R.string.domain_label) + " ";
113 String cNameLabel = getString(R.string.common_name) + " ";
114 String oNameLabel = getString(R.string.organization) + " ";
115 String uNameLabel = getString(R.string.organizational_unit) + " ";
116 String startDateLabel = getString(R.string.start_date) + " ";
117 String endDateLabel = getString(R.string.end_date) + " ";
119 // Parse `formattedUrlString` to a `URI`.
120 Uri uri = Uri.parse(MainWebViewActivity.formattedUrlString);
122 // Extract the domain name from `uri`.
123 String domainString = uri.getHost();
125 // Get the SSL certificate.
126 SslCertificate sslCertificate = MainWebViewActivity.sslCertificate;
128 // Get the strings from the SSL certificate.
129 String issuedToCNameString = sslCertificate.getIssuedTo().getCName();
130 String issuedToONameString = sslCertificate.getIssuedTo().getOName();
131 String issuedToUNameString = sslCertificate.getIssuedTo().getUName();
132 String issuedByCNameString = sslCertificate.getIssuedBy().getCName();
133 String issuedByONameString = sslCertificate.getIssuedBy().getOName();
134 String issuedByUNameString = sslCertificate.getIssuedBy().getUName();
135 Date startDate = sslCertificate.getValidNotBeforeDate();
136 Date endDate = sslCertificate.getValidNotAfterDate();
138 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
139 SpannableStringBuilder domainStringBuilder = new SpannableStringBuilder(domainLabel + domainString);
140 SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCNameString);
141 SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToONameString);
142 SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUNameString);
143 SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCNameString);
144 SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByONameString);
145 SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUNameString);
146 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
147 SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
149 // Create a red `ForegroundColorSpan`. We have to use the deprecated `getColor` until API >= 23.
150 @SuppressWarnings("deprecation") ForegroundColorSpan redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
152 // Create a blue `ForegroundColorSpan`.
153 ForegroundColorSpan blueColorSpan;
155 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
156 if (MainWebViewActivity.darkTheme) {
157 //noinspection deprecation
158 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
160 //noinspection deprecation
161 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
164 // Formet the `domainString` and `issuedToCName` colors.
165 if (domainString.equals(issuedToCNameString)) { // `domainString` and `issuedToCNameString` match.
166 // Set the strings to be blue.
167 domainStringBuilder.setSpan(blueColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
168 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
169 } else if(issuedToCNameString.startsWith("*.")){ // `issuedToCNameString` begins with a wildcard.
170 // Remove the initial `*.`.
171 String baseCertificateDomain = issuedToCNameString.substring(2);
173 // Setup a copy of `domainString` to test subdomains.
174 String domainStringSubdomain = domainString;
176 // Initialize `domainNamesMatch`.
177 boolean domainNamesMatch = false;
179 // Check all the subdomains in `domainStringSubdomain` against `baseCertificateDomain`.
180 while (!domainNamesMatch && domainStringSubdomain.contains(".")) { // Stop checking if we know that `domainNamesMatch` is `true` or if we run out of `.`.
181 // Test the `domainStringSubdomain` against `baseCertificateDomain`.
182 if (domainStringSubdomain.equals(baseCertificateDomain)) {
183 domainNamesMatch = true;
186 // Strip out the lowest subdomain of `certificateCommonNameSubdomain`.
187 domainStringSubdomain = domainStringSubdomain.substring(domainStringSubdomain.indexOf(".") + 1);
190 // Format the domain and issued to Common Name according to `domainNamesMatch`.
191 if (domainNamesMatch) { // `domainString` is a subdomain of the wildcard `issuedToCNameString`.
192 // Set the strings to be blue.
193 domainStringBuilder.setSpan(blueColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
194 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
195 } else { // `domainString` is not a subdomain of the wildcard `issuedToCNameString`.
196 // Set the string to be red.
197 domainStringBuilder.setSpan(redColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
198 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
200 } else { // The strings do not match and `issuedToCNameString` does not begin with a wildcard.
201 // Set the strings to be red.
202 domainStringBuilder.setSpan(redColorSpan, domainLabel.length(), domainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
203 issuedToCNameStringBuilder.setSpan(redColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
206 // Setup the issued to and issued by spans to display the certificate information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
207 issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
208 issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
209 issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
210 issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
211 issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
213 Date currentDate = Calendar.getInstance().getTime();
215 // Format the start date color. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
216 if (startDate.after(currentDate)) { // The certificate start date is in the future.
217 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
218 } else { // The certificate start date is in the past.
219 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
222 // Format the end date color. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
223 if (endDate.before(currentDate)) { // The certificate end date is in the past.
224 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
225 } else { // The certificate end date is in the future.
226 endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 // Display the strings.
230 domainTextView.setText(domainStringBuilder);
231 issuedToCNameTextView.setText(issuedToCNameStringBuilder);
232 issuedToONameTextView.setText(issuedToONameStringBuilder);
233 issuedToUNameTextView.setText(issuedToUNameStringBuilder);
234 issuedByCNameTextView.setText(issuedByCNameStringBuilder);
235 issuedByONameTextView.setText(issuedByONameStringBuilder);
236 issuedByUNameTextView.setText(issuedByUNameStringBuilder);
237 startDateTextView.setText(startDateStringBuilder);
238 endDateTextView.setText(endDateStringBuilder);
240 // `onCreateDialog` requires the return of an `AlertDialog`.