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.fragments;
22 import android.annotation.SuppressLint;
23 import android.content.pm.PackageManager;
24 import android.content.pm.Signature;
25 import android.os.Build;
26 import android.os.Bundle;
27 import android.support.v4.app.Fragment;
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 com.stoutner.privacybrowser.BuildConfig;
38 import com.stoutner.privacybrowser.R;
39 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
41 import java.io.ByteArrayInputStream;
42 import java.io.InputStream;
43 import java.math.BigInteger;
44 import java.security.Principal;
45 import java.security.cert.CertificateException;
46 import java.security.cert.CertificateFactory;
47 import java.security.cert.X509Certificate;
48 import java.text.DateFormat;
49 import java.util.Date;
51 public class AboutTabFragment extends Fragment {
52 private int tabNumber;
54 // Store the tab number in the arguments bundle.
55 public static AboutTabFragment createTab(int tab) {
57 Bundle bundle = new Bundle();
59 // Store the tab number in the bundle.
60 bundle.putInt("Tab", tab);
62 // Add the bundle to the fragment.
63 AboutTabFragment aboutTabFragment = new AboutTabFragment();
64 aboutTabFragment.setArguments(bundle);
66 // Return the new fragment.
67 return aboutTabFragment;
71 public void onCreate(Bundle savedInstanceState) {
72 // Run the default commands.
73 super.onCreate(savedInstanceState);
75 // Store the tab number in a class variable.
76 tabNumber = getArguments().getInt("Tab");
80 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
83 // Load the tabs. Tab numbers start at 0.
84 if (tabNumber == 0) { // Load the about tab.
85 // 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.
86 tabLayout = inflater.inflate(R.layout.about_tab_version, container, false);
88 // Get handles for the `TextViews`.
89 TextView versionNumberTextView = tabLayout.findViewById(R.id.about_version_number);
90 TextView versionBrandTextView = tabLayout.findViewById(R.id.about_version_brand);
91 TextView versionManufacturerTextView = tabLayout.findViewById(R.id.about_version_manufacturer);
92 TextView versionModelTextView = tabLayout.findViewById(R.id.about_version_model);
93 TextView versionDeviceTextView = tabLayout.findViewById(R.id.about_version_device);
94 TextView versionBootloaderTextView = tabLayout.findViewById(R.id.about_version_bootloader);
95 TextView versionRadioTextView = tabLayout.findViewById(R.id.about_version_radio);
96 TextView versionAndroidTextView = tabLayout.findViewById(R.id.about_version_android);
97 TextView versionSecurityPatchTextView = tabLayout.findViewById(R.id.about_version_securitypatch);
98 TextView versionBuildTextView = tabLayout.findViewById(R.id.about_version_build);
99 TextView versionWebKitTextView = tabLayout.findViewById(R.id.about_version_webkit);
100 TextView versionChromeTextView = tabLayout.findViewById(R.id.about_version_chrome);
101 TextView versionOrbotTextView = tabLayout.findViewById(R.id.about_version_orbot);
102 TextView certificateIssuerDNTextView = tabLayout.findViewById(R.id.about_version_certificate_issuer_dn);
103 TextView certificateSubjectDNTextView = tabLayout.findViewById(R.id.about_version_certificate_subject_dn);
104 TextView certificateStartDateTextView = tabLayout.findViewById(R.id.about_version_certificate_start_date);
105 TextView certificateEndDateTextView = tabLayout.findViewById(R.id.about_version_certificate_end_date);
106 TextView certificateVersionTextView = tabLayout.findViewById(R.id.about_version_certificate_version);
107 TextView certificateSerialNumberTextView = tabLayout.findViewById(R.id.about_version_certificate_serial_number);
108 TextView certificateSignatureAlgorithmTextView = tabLayout.findViewById(R.id.about_version_certificate_signature_algorithm);
111 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
112 String brandLabel = getString(R.string.brand) + " ";
113 String manufacturerLabel = getString(R.string.manufacturer) + " ";
114 String modelLabel = getString(R.string.model) + " ";
115 String deviceLabel = getString(R.string.device) + " ";
116 String bootloaderLabel = getString(R.string.bootloader) + " ";
117 String androidLabel = getString(R.string.android) + " ";
118 String buildLabel = getString(R.string.build) + " ";
119 String webKitLabel = getString(R.string.webkit) + " ";
120 String chromeLabel = getString(R.string.chrome) + " ";
121 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
122 String subjectDNLabel = getString(R.string.subject_dn) + " ";
123 String startDateLabel = getString(R.string.start_date) + " ";
124 String endDateLabel = getString(R.string.end_date) + " ";
125 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
126 String serialNumberLabel = getString(R.string.serial_number) + " ";
127 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
129 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
130 View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false);
131 WebView tabLayoutWebView = webViewLayout.findViewById(R.id.bare_webview);
132 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
134 // Get the device's information and store it in strings.
135 String brand = Build.BRAND;
136 String manufacturer = Build.MANUFACTURER;
137 String model = Build.MODEL;
138 String device = Build.DEVICE;
139 String bootloader = Build.BOOTLOADER;
140 String radio = Build.getRadioVersion();
141 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
142 String build = Build.DISPLAY;
143 // Select the substring that begins after "Safari/" and goes to the end of the string.
144 String webKit = userAgentString.substring(userAgentString.indexOf("Safari/") + 7);
145 // Select the substring that begins after "Chrome/" and goes until the next " ".
146 String chrome = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
148 // Get the Orbot version name if Orbot is installed.
151 // Store the version name.
152 orbot = getContext().getPackageManager().getPackageInfo("org.torproject.android", PackageManager.GET_CONFIGURATIONS).versionName;
153 } catch (PackageManager.NameNotFoundException e) { // Orbot is not installed.
157 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
158 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
159 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
160 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
161 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
162 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
163 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
164 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
165 SpannableStringBuilder webKitStringBuilder = new SpannableStringBuilder(webKitLabel + webKit);
166 SpannableStringBuilder chromeStringBuilder = new SpannableStringBuilder(chromeLabel + chrome);
168 // Create the `blueColorSpan` variable.
169 ForegroundColorSpan blueColorSpan;
171 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
172 if (MainWebViewActivity.darkTheme) {
173 //noinspection deprecation
174 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
176 //noinspection deprecation
177 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
180 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
181 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
182 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
183 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
184 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
185 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
186 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
187 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
188 webKitStringBuilder.setSpan(blueColorSpan, webKitLabel.length(), webKitStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
189 chromeStringBuilder.setSpan(blueColorSpan, chromeLabel.length(), chromeStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
191 // Display the strings in the text boxes.
192 versionNumberTextView.setText(version);
193 versionBrandTextView.setText(brandStringBuilder);
194 versionManufacturerTextView.setText(manufacturerStringBuilder);
195 versionModelTextView.setText(modelStringBuilder);
196 versionDeviceTextView.setText(deviceStringBuilder);
197 versionBootloaderTextView.setText(bootloaderStringBuilder);
198 versionAndroidTextView.setText(androidStringBuilder);
199 versionBuildTextView.setText(buildStringBuilder);
200 versionWebKitTextView.setText(webKitStringBuilder);
201 versionChromeTextView.setText(chromeStringBuilder);
203 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
204 if (Build.VERSION.SDK_INT >= 23) {
205 String securityPatchLabel = getString(R.string.security_patch) + " ";
206 String securityPatch = Build.VERSION.SECURITY_PATCH;
207 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
208 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
209 versionSecurityPatchTextView.setText(securityPatchStringBuilder);
210 } else { // SDK_INT < 23, so `versionSecurityPatchTextView` should be hidden.
211 versionSecurityPatchTextView.setVisibility(View.GONE);
214 // Only populate `versionRadioTextView` if there is a radio in the device.
215 if (!radio.equals("")) {
216 String radioLabel = getString(R.string.radio) + " ";
217 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
218 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
219 versionRadioTextView.setText(radioStringBuilder);
220 } else { // This device does not have a radio, so `versionRadioTextView` should be hidden.
221 versionRadioTextView.setVisibility(View.GONE);
224 // Only populate `versionOrbotTextView` if Orbot is installed.
225 if (!orbot.equals("")) {
226 String orbotLabel = getString(R.string.orbot) + " ";
227 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
228 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 versionOrbotTextView.setText(orbotStringBuilder);
230 } else { // Orbot is not installed, so the `versionOrbotTextView` should be hidden.
231 versionOrbotTextView.setVisibility(View.GONE);
234 // Display the package signature.
236 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
237 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
239 // Convert the signature to a `byte[]` `InputStream`.
240 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
242 // Display the certificate information on the screen.
244 // Instantiate a `CertificateFactory`.
245 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
247 // Generate an `X509Certificate`.
248 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
250 // Store the individual sections of the certificate that we are interested in.
251 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
252 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
253 Date startDate = x509Certificate.getNotBefore();
254 Date endDate = x509Certificate.getNotAfter();
255 int certificateVersion = x509Certificate.getVersion();
256 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
257 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
259 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
260 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
261 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
262 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
263 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
264 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
265 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
266 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
268 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
269 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
270 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
271 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
272 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
273 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
274 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
275 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
277 // Display the strings in the text boxes.
278 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
279 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
280 certificateStartDateTextView.setText(startDateStringBuilder);
281 certificateEndDateTextView.setText(endDataStringBuilder);
282 certificateVersionTextView.setText(certificateVersionStringBuilder);
283 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
284 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
285 } catch (CertificateException e) {
286 // Do nothing if there is a certificate error.
288 } catch (PackageManager.NameNotFoundException e) {
289 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
291 } else { // load a `WebView` for all the other tabs. Tab numbers start at 0.
292 // 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.
293 tabLayout = inflater.inflate(R.layout.bare_webview, container, false);
295 // Get a handle for `tabWebView`.
296 WebView tabWebView = (WebView) tabLayout;
298 // Load the tabs according to the theme.
299 if (MainWebViewActivity.darkTheme) { // The dark theme is applied.
300 // Set the background color. We have to use the deprecated `.getColor()` until API >= 23.
301 //noinspection deprecation
302 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
306 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
310 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
314 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
318 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
322 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
326 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
329 } else { // The light theme is applied.
332 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
336 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
340 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
344 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
348 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
352 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
358 // Return the formatted `tabLayout`.