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 private int tabNumber;
57 // Store the tab number in the arguments bundle.
58 public static AboutTabFragment createTab(int tab) {
60 Bundle bundle = new Bundle();
62 // Store the tab number in the bundle.
63 bundle.putInt("Tab", tab);
65 // Add the bundle to the fragment.
66 AboutTabFragment aboutTabFragment = new AboutTabFragment();
67 aboutTabFragment.setArguments(bundle);
69 // Return the new fragment.
70 return aboutTabFragment;
74 public void onCreate(Bundle savedInstanceState) {
75 // Run the default commands.
76 super.onCreate(savedInstanceState);
78 // Remove the lint warning that `getArguments()` might be null.
79 assert getArguments() != null;
81 // Store the tab number in a class variable.
82 tabNumber = getArguments().getInt("Tab");
86 public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
87 // Create a tab layout view.
90 // Get a handle for the context and assert that it isn't null.
91 Context context = getContext();
92 assert context != null;
94 // Load the tabs. Tab numbers start at 0.
95 if (tabNumber == 0) { // Load the about tab.
96 // 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.
97 tabLayout = inflater.inflate(R.layout.about_tab_version, container, false);
99 // Get handles for the `TextViews`.
100 TextView versionTextView = tabLayout.findViewById(R.id.version);
101 TextView brandTextView = tabLayout.findViewById(R.id.brand);
102 TextView manufacturerTextView = tabLayout.findViewById(R.id.manufacturer);
103 TextView modelTextView = tabLayout.findViewById(R.id.model);
104 TextView deviceTextView = tabLayout.findViewById(R.id.device);
105 TextView bootloaderTextView = tabLayout.findViewById(R.id.bootloader);
106 TextView radioTextView = tabLayout.findViewById(R.id.radio);
107 TextView androidTextView = tabLayout.findViewById(R.id.android);
108 TextView securityPatchTextView = tabLayout.findViewById(R.id.security_patch);
109 TextView buildTextView = tabLayout.findViewById(R.id.build);
110 TextView webViewTextView = tabLayout.findViewById(R.id.webview);
111 TextView orbotTextView = tabLayout.findViewById(R.id.orbot);
112 TextView openKeychainTextView = tabLayout.findViewById(R.id.open_keychain);
113 TextView easyListTextView = tabLayout.findViewById(R.id.easylist);
114 TextView easyPrivacyTextView = tabLayout.findViewById(R.id.easyprivacy);
115 TextView fanboyAnnoyanceTextView = tabLayout.findViewById(R.id.fanboy_annoyance);
116 TextView fanboySocialTextView = tabLayout.findViewById(R.id.fanboy_social);
117 TextView ultraPrivacyTextView = tabLayout.findViewById(R.id.ultraprivacy);
118 TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.certificate_issuer_dn);
119 TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.certificate_subject_dn);
120 TextView certificateStartDateTextView = tabLayout.findViewById(R.id.certificate_start_date);
121 TextView certificateEndDateTextView = tabLayout.findViewById(R.id.certificate_end_date);
122 TextView certificateVersionTextView = tabLayout.findViewById(R.id.certificate_version);
123 TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.certificate_serial_number);
124 TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.certificate_signature_algorithm);
127 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
128 String brandLabel = getString(R.string.brand) + " ";
129 String manufacturerLabel = getString(R.string.manufacturer) + " ";
130 String modelLabel = getString(R.string.model) + " ";
131 String deviceLabel = getString(R.string.device) + " ";
132 String bootloaderLabel = getString(R.string.bootloader) + " ";
133 String androidLabel = getString(R.string.android) + " ";
134 String buildLabel = getString(R.string.build) + " ";
135 String webViewLabel = getString(R.string.webview) + " ";
136 String easyListLabel = getString(R.string.easylist_label) + " ";
137 String easyPrivacyLabel = getString(R.string.easyprivacy_label) + " ";
138 String fanboyAnnoyanceLabel = getString(R.string.fanboy_annoyance_label) + " ";
139 String fanboySocialLabel = getString(R.string.fanboy_social_label) + " ";
140 String ultraPrivacyLabel = getString(R.string.ultraprivacy_label) + " ";
141 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
142 String subjectDNLabel = getString(R.string.subject_dn) + " ";
143 String startDateLabel = getString(R.string.start_date) + " ";
144 String endDateLabel = getString(R.string.end_date) + " ";
145 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
146 String serialNumberLabel = getString(R.string.serial_number) + " ";
147 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
149 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
150 View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false);
151 WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
152 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
154 // Get the device's information and store it in strings.
155 String brand = Build.BRAND;
156 String manufacturer = Build.MANUFACTURER;
157 String model = Build.MODEL;
158 String device = Build.DEVICE;
159 String bootloader = Build.BOOTLOADER;
160 String radio = Build.getRadioVersion();
161 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
162 String build = Build.DISPLAY;
163 // Select the substring that begins after `Chrome/` and goes until the next ` `.
164 String webView = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
166 // Get the Orbot version name if Orbot is installed.
169 // Store the version name.
170 orbot = context.getPackageManager().getPackageInfo("org.torproject.android", 0).versionName;
171 } catch (PackageManager.NameNotFoundException exception) { // Orbot is not installed.
175 // Get the OpenKeychain version name if it is installed.
178 // Store the version name.
179 openKeychain = context.getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName;
180 } catch (PackageManager.NameNotFoundException exception) { // OpenKeychain is not installed.
184 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
185 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
186 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
187 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
188 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
189 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
190 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
191 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
192 SpannableStringBuilder webViewStringBuilder = new SpannableStringBuilder(webViewLabel + webView);
193 SpannableStringBuilder easyListStringBuilder = new SpannableStringBuilder(easyListLabel + MainWebViewActivity.easyListVersion);
194 SpannableStringBuilder easyPrivacyStringBuilder = new SpannableStringBuilder(easyPrivacyLabel + MainWebViewActivity.easyPrivacyVersion);
195 SpannableStringBuilder fanboyAnnoyanceStringBuilder = new SpannableStringBuilder(fanboyAnnoyanceLabel + MainWebViewActivity.fanboysAnnoyanceVersion);
196 SpannableStringBuilder fanboySocialStringBuilder = new SpannableStringBuilder(fanboySocialLabel + MainWebViewActivity.fanboysSocialVersion);
197 SpannableStringBuilder ultraPrivacyStringBuilder = new SpannableStringBuilder(ultraPrivacyLabel + MainWebViewActivity.ultraPrivacyVersion);
199 // Create the `blueColorSpan` variable.
200 ForegroundColorSpan blueColorSpan;
202 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
203 if (MainWebViewActivity.darkTheme) {
204 //noinspection deprecation
205 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
207 //noinspection deprecation
208 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
211 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
212 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
213 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
214 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
215 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
216 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
217 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
218 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
219 webViewStringBuilder.setSpan(blueColorSpan, webViewLabel.length(), webViewStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
220 easyListStringBuilder.setSpan(blueColorSpan, easyListLabel.length(), easyListStringBuilder.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
221 easyPrivacyStringBuilder.setSpan(blueColorSpan, easyPrivacyLabel.length(), easyPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
222 fanboyAnnoyanceStringBuilder.setSpan(blueColorSpan, fanboyAnnoyanceLabel.length(), fanboyAnnoyanceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
223 fanboySocialStringBuilder.setSpan(blueColorSpan, fanboySocialLabel.length(), fanboySocialStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
224 ultraPrivacyStringBuilder.setSpan(blueColorSpan, ultraPrivacyLabel.length(), ultraPrivacyStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
226 // Display the strings in the text boxes.
227 versionTextView.setText(version);
228 brandTextView.setText(brandStringBuilder);
229 manufacturerTextView.setText(manufacturerStringBuilder);
230 modelTextView.setText(modelStringBuilder);
231 deviceTextView.setText(deviceStringBuilder);
232 bootloaderTextView.setText(bootloaderStringBuilder);
233 androidTextView.setText(androidStringBuilder);
234 buildTextView.setText(buildStringBuilder);
235 webViewTextView.setText(webViewStringBuilder);
236 easyListTextView.setText(easyListStringBuilder);
237 easyPrivacyTextView.setText(easyPrivacyStringBuilder);
238 fanboyAnnoyanceTextView.setText(fanboyAnnoyanceStringBuilder);
239 fanboySocialTextView.setText(fanboySocialStringBuilder);
240 ultraPrivacyTextView.setText(ultraPrivacyStringBuilder);
242 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
243 if (Build.VERSION.SDK_INT >= 23) {
244 String securityPatchLabel = getString(R.string.security_patch) + " ";
245 String securityPatch = Build.VERSION.SECURITY_PATCH;
246 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
247 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
248 securityPatchTextView.setText(securityPatchStringBuilder);
249 } else { // SDK_INT < 23.
250 securityPatchTextView.setVisibility(View.GONE);
253 // Only populate the radio text view if there is a radio in the device.
254 if (!radio.isEmpty()) {
255 String radioLabel = getString(R.string.radio) + " ";
256 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
257 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
258 radioTextView.setText(radioStringBuilder);
259 } else { // This device does not have a radio.
260 radioTextView.setVisibility(View.GONE);
263 // Only populate the Orbot text view if it is installed.
264 if (!orbot.isEmpty()) {
265 String orbotLabel = getString(R.string.orbot) + " ";
266 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
267 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
268 orbotTextView.setText(orbotStringBuilder);
269 } else { // Orbot is not installed.
270 orbotTextView.setVisibility(View.GONE);
273 // Only populate the OpenKeychain text view if it is installed.
274 if (!openKeychain.isEmpty()) {
275 String openKeychainLabel = getString(R.string.openkeychain) + " ";
276 SpannableStringBuilder openKeychainStringBuilder = new SpannableStringBuilder(openKeychainLabel + openKeychain);
277 openKeychainStringBuilder.setSpan(blueColorSpan, openKeychainLabel.length(), openKeychainStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
278 openKeychainTextView.setText(openKeychainStringBuilder);
279 } else { //OpenKeychain is not installed.
280 openKeychainTextView.setVisibility(View.GONE);
283 // Display the package signature.
285 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
286 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
288 // Convert the signature to a `byte[]` `InputStream`.
289 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
291 // Display the certificate information on the screen.
293 // Instantiate a `CertificateFactory`.
294 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
296 // Generate an `X509Certificate`.
297 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
299 // Store the individual sections of the certificate that we are interested in.
300 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
301 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
302 Date startDate = x509Certificate.getNotBefore();
303 Date endDate = x509Certificate.getNotAfter();
304 int certificateVersion = x509Certificate.getVersion();
305 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
306 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
308 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
309 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
310 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
311 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
312 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
313 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
314 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
315 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
317 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
318 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
319 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
320 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
321 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
322 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
323 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
324 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
326 // Display the strings in the text boxes.
327 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
328 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
329 certificateStartDateTextView.setText(startDateStringBuilder);
330 certificateEndDateTextView.setText(endDataStringBuilder);
331 certificateVersionTextView.setText(certificateVersionStringBuilder);
332 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
333 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
334 } catch (CertificateException e) {
335 // Do nothing if there is a certificate error.
337 } catch (PackageManager.NameNotFoundException e) {
338 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
340 } else { // load a `WebView` for all the other tabs. Tab numbers start at 0.
341 // 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.
342 tabLayout = inflater.inflate(R.layout.bare_webview, container, false);
344 // Get a handle for `tabWebView`.
345 WebView tabWebView = (WebView) tabLayout;
347 // Load the tabs according to the theme.
348 if (MainWebViewActivity.darkTheme) { // The dark theme is applied.
349 // Set the background color. We have to use the deprecated `.getColor()` until API >= 23.
350 //noinspection deprecation
351 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
355 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
359 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
363 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
367 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
371 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
375 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
378 } else { // The light theme is applied.
381 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
385 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
389 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
393 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
397 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
401 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
407 // Return the formatted `tabLayout`.