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.fragments;
22 import android.annotation.SuppressLint;
23 import android.content.Context;
24 import android.content.pm.PackageManager;
25 import android.content.pm.Signature;
26 import android.os.Build;
27 import android.os.Bundle;
28 import android.text.SpannableStringBuilder;
29 import android.text.Spanned;
30 import android.text.style.ForegroundColorSpan;
31 import android.view.LayoutInflater;
32 import android.view.View;
33 import android.view.ViewGroup;
34 import android.webkit.WebView;
35 import android.widget.TextView;
37 import androidx.annotation.NonNull;
38 import androidx.fragment.app.Fragment;
40 import com.stoutner.privacybrowser.BuildConfig;
41 import com.stoutner.privacybrowser.R;
42 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
44 import java.io.ByteArrayInputStream;
45 import java.io.InputStream;
46 import java.math.BigInteger;
47 import java.security.Principal;
48 import java.security.cert.CertificateException;
49 import java.security.cert.CertificateFactory;
50 import java.security.cert.X509Certificate;
51 import java.text.DateFormat;
52 import java.util.Date;
54 public class AboutTabFragment extends Fragment {
55 // Track the current tab number.
56 private int tabNumber;
58 // Store the tab number in the arguments bundle.
59 public static AboutTabFragment createTab(int tab) {
61 Bundle bundle = new Bundle();
63 // Store the tab number in the bundle.
64 bundle.putInt("Tab", tab);
66 // Add the bundle to the fragment.
67 AboutTabFragment aboutTabFragment = new AboutTabFragment();
68 aboutTabFragment.setArguments(bundle);
70 // Return the new fragment.
71 return aboutTabFragment;
75 public void onCreate(Bundle savedInstanceState) {
76 // Run the default commands.
77 super.onCreate(savedInstanceState);
79 // Remove the lint warning that `getArguments()` might be null.
80 assert getArguments() != null;
82 // Store the tab number in a class variable.
83 tabNumber = getArguments().getInt("Tab");
87 public View onCreateView(@NonNull LayoutInflater layoutInflater, ViewGroup container, Bundle savedInstanceState) {
88 // Create a tab layout view.
91 // Get a handle for the context and assert that it isn't null.
92 Context context = getContext();
93 assert context != null;
95 // Load the tabs. Tab numbers start at 0.
96 if (tabNumber == 0) { // Load the about tab.
97 // Setting false at the end of inflater.inflate does not attach the inflated layout as a child of container. The fragment will take care of attaching the root automatically.
98 tabLayout = layoutInflater.inflate(R.layout.about_tab_version, container, false);
100 // Get handles for the `TextViews`.
101 TextView versionTextView = tabLayout.findViewById(R.id.version);
102 TextView brandTextView = tabLayout.findViewById(R.id.brand);
103 TextView manufacturerTextView = tabLayout.findViewById(R.id.manufacturer);
104 TextView modelTextView = tabLayout.findViewById(R.id.model);
105 TextView deviceTextView = tabLayout.findViewById(R.id.device);
106 TextView bootloaderTextView = tabLayout.findViewById(R.id.bootloader);
107 TextView radioTextView = tabLayout.findViewById(R.id.radio);
108 TextView androidTextView = tabLayout.findViewById(R.id.android);
109 TextView securityPatchTextView = tabLayout.findViewById(R.id.security_patch);
110 TextView buildTextView = tabLayout.findViewById(R.id.build);
111 TextView webViewTextView = tabLayout.findViewById(R.id.webview);
112 TextView orbotTextView = tabLayout.findViewById(R.id.orbot);
113 TextView openKeychainTextView = tabLayout.findViewById(R.id.open_keychain);
114 TextView easyListTextView = tabLayout.findViewById(R.id.easylist);
115 TextView easyPrivacyTextView = tabLayout.findViewById(R.id.easyprivacy);
116 TextView fanboyAnnoyanceTextView = tabLayout.findViewById(R.id.fanboy_annoyance);
117 TextView fanboySocialTextView = tabLayout.findViewById(R.id.fanboy_social);
118 TextView ultraPrivacyTextView = tabLayout.findViewById(R.id.ultraprivacy);
119 TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.certificate_issuer_dn);
120 TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.certificate_subject_dn);
121 TextView certificateStartDateTextView = tabLayout.findViewById(R.id.certificate_start_date);
122 TextView certificateEndDateTextView = tabLayout.findViewById(R.id.certificate_end_date);
123 TextView certificateVersionTextView = tabLayout.findViewById(R.id.certificate_version);
124 TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.certificate_serial_number);
125 TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.certificate_signature_algorithm);
128 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
129 String brandLabel = getString(R.string.brand) + " ";
130 String manufacturerLabel = getString(R.string.manufacturer) + " ";
131 String modelLabel = getString(R.string.model) + " ";
132 String deviceLabel = getString(R.string.device) + " ";
133 String bootloaderLabel = getString(R.string.bootloader) + " ";
134 String androidLabel = getString(R.string.android) + " ";
135 String buildLabel = getString(R.string.build) + " ";
136 String webViewLabel = getString(R.string.webview) + " ";
137 String easyListLabel = getString(R.string.easylist_label) + " ";
138 String easyPrivacyLabel = getString(R.string.easyprivacy_label) + " ";
139 String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + " ";
140 String fanboySocialLabel = getString(R.string.fanboy_social_label) + " ";
141 String ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + " ";
142 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
143 String subjectDNLabel = getString(R.string.subject_dn) + " ";
144 String startDateLabel = getString(R.string.start_date) + " ";
145 String endDateLabel = getString(R.string.end_date) + " ";
146 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
147 String serialNumberLabel = getString(R.string.serial_number) + " ";
148 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
150 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
151 View webViewLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
152 WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
153 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
155 // Get the device's information and store it in strings.
156 String brand = Build.BRAND;
157 String manufacturer = Build.MANUFACTURER;
158 String model = Build.MODEL;
159 String device = Build.DEVICE;
160 String bootloader = Build.BOOTLOADER;
161 String radio = Build.getRadioVersion();
162 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
163 String build = Build.DISPLAY;
164 // Select the substring that begins after `Chrome/` and goes until the next ` `.
165 String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
167 // Get the Orbot version name if Orbot is installed.
170 // Store the version name.
171 orbot = context.getPackageManager().getPackageInfo("org.torproject.android", 0).versionName;
172 } catch (PackageManager.NameNotFoundException exception) { // Orbot is not installed.
176 // Get the OpenKeychain version name if it is installed.
179 // Store the version name.
180 openKeychain = context.getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName;
181 } catch (PackageManager.NameNotFoundException exception) { // OpenKeychain is not installed.
185 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
186 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
187 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
188 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
189 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
190 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
191 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
192 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
193 SpannableStringBuilder webViewStringBuilder = new SpannableStringBuilder(webViewLabel + webView);
194 SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + MainWebViewActivity.easyListVersion);
195 SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + MainWebViewActivity.easyPrivacyVersion);
196 SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + MainWebViewActivity.fanboysAnnoyanceVersion);
197 SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + MainWebViewActivity.fanboysSocialVersion);
198 SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + MainWebViewActivity.ultraPrivacyVersion);
200 // Create the `blueColorSpan` variable.
201 ForegroundColorSpan blueColorSpan;
203 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
204 if (MainWebViewActivity.darkTheme) {
205 //noinspection deprecation
206 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
208 //noinspection deprecation
209 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
212 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
213 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
214 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
215 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
216 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
217 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
218 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
219 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
220 webViewStringBuilder.setSpan(blueColorSpan, webViewLabel.length(), webViewStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
221 easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
222 easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
223 fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
224 fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
225 ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
227 // Display the strings in the text boxes.
228 versionTextView.setText(version);
229 brandTextView.setText(brandStringBuilder);
230 manufacturerTextView.setText(manufacturerStringBuilder);
231 modelTextView.setText(modelStringBuilder);
232 deviceTextView.setText(deviceStringBuilder);
233 bootloaderTextView.setText(bootloaderStringBuilder);
234 androidTextView.setText(androidStringBuilder);
235 buildTextView.setText(buildStringBuilder);
236 webViewTextView.setText(webViewStringBuilder);
237 easyListTextView.setText(easyListStringBuilder);
238 easyPrivacyTextView.setText(easyPrivacyStringBuilder);
239 fanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
240 fanboySocialTextView.setText(fanboySocialStringBuilder);
241 ultraPrivacyTextView.setText(ultraPrivacyStringBuilder);
243 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
244 if (Build.VERSION.SDK_INT >= 23) {
245 String securityPatchLabel = getString(R.string.security_patch) + " ";
246 String securityPatch = Build.VERSION.SECURITY_PATCH;
247 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
248 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
249 securityPatchTextView.setText(securityPatchStringBuilder);
250 } else { // SDK_INT < 23.
251 securityPatchTextView.setVisibility(View.GONE);
254 // Only populate the radio text view if there is a radio in the device.
255 if (!radio.isEmpty()) {
256 String radioLabel = getString(R.string.radio) + " ";
257 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
258 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
259 radioTextView.setText(radioStringBuilder);
260 } else { // This device does not have a radio.
261 radioTextView.setVisibility(View.GONE);
264 // Only populate the Orbot text view if it is installed.
265 if (!orbot.isEmpty()) {
266 String orbotLabel = getString(R.string.orbot) + " ";
267 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
268 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
269 orbotTextView.setText(orbotStringBuilder);
270 } else { // Orbot is not installed.
271 orbotTextView.setVisibility(View.GONE);
274 // Only populate the OpenKeychain text view if it is installed.
275 if (!openKeychain.isEmpty()) {
276 String openKeychainLabel = getString(R.string.openkeychain) + " ";
277 SpannableStringBuilder openKeychainStringBuilder = new SpannableStringBuilder(openKeychainLabel + openKeychain);
278 openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length(), openKeychainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
279 openKeychainTextView.setText(openKeychainStringBuilder);
280 } else { //OpenKeychain is not installed.
281 openKeychainTextView.setVisibility(View.GONE);
284 // Display the package signature.
286 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
287 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
289 // Convert the signature to a `byte[]` `InputStream`.
290 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
292 // Display the certificate information on the screen.
294 // Instantiate a `CertificateFactory`.
295 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
297 // Generate an `X509Certificate`.
298 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
300 // Store the individual sections of the certificate that we are interested in.
301 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
302 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
303 Date startDate = x509Certificate.getNotBefore();
304 Date endDate = x509Certificate.getNotAfter();
305 int certificateVersion = x509Certificate.getVersion();
306 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
307 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
309 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
310 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
311 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
312 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
313 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
314 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
315 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
316 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
318 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
319 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
320 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
321 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
322 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
323 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
324 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
325 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
327 // Display the strings in the text boxes.
328 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
329 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
330 certificateStartDateTextView.setText(startDateStringBuilder);
331 certificateEndDateTextView.setText(endDataStringBuilder);
332 certificateVersionTextView.setText(certificateVersionStringBuilder);
333 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
334 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
335 } catch (CertificateException e) {
336 // Do nothing if there is a certificate error.
338 } catch (PackageManager.NameNotFoundException e) {
339 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
341 } else { // load a `WebView` for all the other tabs. Tab numbers start at 0.
342 // Setting false at the end of inflater.inflate does not attach the inflated layout as a child of container. The fragment will take care of attaching the root automatically.
343 tabLayout = layoutInflater.inflate(R.layout.bare_webview, container, false);
345 // Get a handle for `tabWebView`.
346 WebView tabWebView = (WebView) tabLayout;
348 // Load the tabs according to the theme.
349 if (MainWebViewActivity.darkTheme) { // The dark theme is applied.
350 // Set the background color. The deprecated `.getColor()` must be used until the minimum API >= 23.
351 //noinspection deprecation
352 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
356 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
360 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
364 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
368 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
372 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
376 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
379 } else { // The light theme is applied.
382 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
386 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
390 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
394 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
398 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
402 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
408 // Return the formatted `tabLayout`.