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.graphics.ColorMatrixColorFilter;
26 import android.graphics.Paint;
27 import android.os.Build;
28 import android.os.Bundle;
29 import android.support.v4.app.Fragment;
30 import android.text.SpannableStringBuilder;
31 import android.text.Spanned;
32 import android.text.style.ForegroundColorSpan;
33 import android.view.LayoutInflater;
34 import android.view.View;
35 import android.view.ViewGroup;
36 import android.webkit.WebView;
37 import android.widget.TextView;
39 import com.stoutner.privacybrowser.BuildConfig;
40 import com.stoutner.privacybrowser.R;
41 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
43 import java.io.ByteArrayInputStream;
44 import java.io.InputStream;
45 import java.math.BigInteger;
46 import java.security.Principal;
47 import java.security.cert.CertificateException;
48 import java.security.cert.CertificateFactory;
49 import java.security.cert.X509Certificate;
50 import java.text.DateFormat;
51 import java.util.Date;
53 public class AboutTabFragment extends Fragment {
54 private int tabNumber;
56 // `AboutTabFragment.createTab` stores the tab number in the bundle arguments so it can be referenced from `onCreate()`.
57 public static AboutTabFragment createTab(int tab) {
58 Bundle thisTabArguments = new Bundle();
59 thisTabArguments.putInt("Tab", tab);
61 AboutTabFragment thisTab = new AboutTabFragment();
62 thisTab.setArguments(thisTabArguments);
67 public void onCreate(Bundle savedInstanceState) {
68 super.onCreate(savedInstanceState);
70 // Store the tab number in `tabNumber`.
71 tabNumber = getArguments().getInt("Tab");
75 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
78 // Load the tabs. Tab numbers start at 0.
79 if (tabNumber == 0) { // Load the about tab.
80 // 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.
81 tabLayout = inflater.inflate(R.layout.about_tab_version, container, false);
83 // Get handles for the `TextViews`.
84 TextView versionNumberTextView = (TextView) tabLayout.findViewById(R.id.about_version_number);
85 TextView versionBrandTextView = (TextView) tabLayout.findViewById(R.id.about_version_brand);
86 TextView versionManufacturerTextView = (TextView) tabLayout.findViewById(R.id.about_version_manufacturer);
87 TextView versionModelTextView = (TextView) tabLayout.findViewById(R.id.about_version_model);
88 TextView versionDeviceTextView = (TextView) tabLayout.findViewById(R.id.about_version_device);
89 TextView versionBootloaderTextView = (TextView) tabLayout.findViewById(R.id.about_version_bootloader);
90 TextView versionRadioTextView = (TextView) tabLayout.findViewById(R.id.about_version_radio);
91 TextView versionAndroidTextView = (TextView) tabLayout.findViewById(R.id.about_version_android);
92 TextView versionBuildTextView = (TextView) tabLayout.findViewById(R.id.about_version_build);
93 TextView versionSecurityPatchTextView = (TextView) tabLayout.findViewById(R.id.about_version_securitypatch);
94 TextView versionWebKitTextView = (TextView) tabLayout.findViewById(R.id.about_version_webkit);
95 TextView versionChromeTextView = (TextView) tabLayout.findViewById(R.id.about_version_chrome);
96 TextView versionOrbotTextView = (TextView) tabLayout.findViewById(R.id.about_version_orbot);
97 TextView certificateIssuerDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_issuer_dn);
98 TextView certificateSubjectDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_subject_dn);
99 TextView certificateStartDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_start_date);
100 TextView certificateEndDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_end_date);
101 TextView certificateVersionTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_version);
102 TextView certificateSerialNumberTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_serial_number);
103 TextView certificateSignatureAlgorithmTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_signature_algorithm);
106 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
107 String brandLabel = getString(R.string.brand) + " ";
108 String manufacturerLabel = getString(R.string.manufacturer) + " ";
109 String modelLabel = getString(R.string.model) + " ";
110 String deviceLabel = getString(R.string.device) + " ";
111 String bootloaderLabel = getString(R.string.bootloader) + " ";
112 String androidLabel = getString(R.string.android) + " ";
113 String buildLabel = getString(R.string.build) + " ";
114 String webKitLabel = getString(R.string.webkit) + " ";
115 String chromeLabel = getString(R.string.chrome) + " ";
116 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
117 String subjectDNLabel = getString(R.string.subject_dn) + " ";
118 String startDateLabel = getString(R.string.start_date) + " ";
119 String endDateLabel = getString(R.string.end_date) + " ";
120 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
121 String serialNumberLabel = getString(R.string.serial_number) + " ";
122 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
124 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
125 View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false);
126 WebView tabLayoutWebView = (WebView) webViewLayout.findViewById(R.id.bare_webview);
127 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
129 // Get the device's information and store it in strings.
130 String brand = Build.BRAND;
131 String manufacturer = Build.MANUFACTURER;
132 String model = Build.MODEL;
133 String device = Build.DEVICE;
134 String bootloader = Build.BOOTLOADER;
135 String radio = Build.getRadioVersion();
136 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
137 String build = Build.DISPLAY;
138 // Select the substring that begins after "Safari/" and goes to the end of the string.
139 String webKit = userAgentString.substring(userAgentString.indexOf("Safari/") + 7);
140 // Select the substring that begins after "Chrome/" and goes until the next " ".
141 String chrome = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
143 // Get the Orbot version name if Orbot is installed.
146 // Store the version name.
147 orbot = getContext().getPackageManager().getPackageInfo("org.torproject.android", PackageManager.GET_CONFIGURATIONS).versionName;
148 } catch (PackageManager.NameNotFoundException e) { // Orbot is not installed.
152 // Create a `SpannableStringBuilder` for the hardware and software `TextViews` that needs multiple colors of text.
153 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
154 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
155 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
156 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
157 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
158 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
159 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
160 SpannableStringBuilder webKitStringBuilder = new SpannableStringBuilder(webKitLabel + webKit);
161 SpannableStringBuilder chromeStringBuilder = new SpannableStringBuilder(chromeLabel + chrome);
163 // Create the `blueColorSpan` variable.
164 ForegroundColorSpan blueColorSpan;
166 // Set `blueColorSpan` according to the theme. We have to use the deprecated `getColor()` until API >= 23.
167 if (MainWebViewActivity.darkTheme) {
168 //noinspection deprecation
169 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_400));
171 //noinspection deprecation
172 blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
175 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
176 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
177 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
178 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
179 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
180 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
181 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
182 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
183 webKitStringBuilder.setSpan(blueColorSpan, webKitLabel.length(), webKitStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
184 chromeStringBuilder.setSpan(blueColorSpan, chromeLabel.length(), chromeStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
186 // Display the strings in the text boxes.
187 versionNumberTextView.setText(version);
188 versionBrandTextView.setText(brandStringBuilder);
189 versionManufacturerTextView.setText(manufacturerStringBuilder);
190 versionModelTextView.setText(modelStringBuilder);
191 versionDeviceTextView.setText(deviceStringBuilder);
192 versionBootloaderTextView.setText(bootloaderStringBuilder);
193 versionAndroidTextView.setText(androidStringBuilder);
194 versionBuildTextView.setText(buildStringBuilder);
195 versionWebKitTextView.setText(webKitStringBuilder);
196 versionChromeTextView.setText(chromeStringBuilder);
198 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
199 if (Build.VERSION.SDK_INT >= 23) {
200 String securityPatchLabel = getString(R.string.security_patch) + " ";
201 String securityPatch = Build.VERSION.SECURITY_PATCH;
202 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
203 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
204 versionSecurityPatchTextView.setText(securityPatchStringBuilder);
205 } else { // SDK_INT < 23, so `versionSecurityPatchTextView` should be hidden.
206 versionSecurityPatchTextView.setVisibility(View.GONE);
209 // Only populate `versionRadioTextView` if there is a radio in the device.
210 if (!radio.equals("")) {
211 String radioLabel = getString(R.string.radio) + " ";
212 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
213 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
214 versionRadioTextView.setText(radioStringBuilder);
215 } else { // This device does not have a radio, so `versionRadioTextView` should be hidden.
216 versionRadioTextView.setVisibility(View.GONE);
219 // Only populate `versionOrbotTextView` if Orbot is installed.
220 if (!orbot.equals("")) {
221 String orbotLabel = getString(R.string.orbot) + " ";
222 SpannableStringBuilder orbotStringBuilder = new SpannableStringBuilder(orbotLabel + orbot);
223 orbotStringBuilder.setSpan(blueColorSpan, orbotLabel.length(), orbotStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
224 versionOrbotTextView.setText(orbotStringBuilder);
225 } else { // Orbot is not installed, so the `versionOrbotTextView` should be hidden.
226 versionOrbotTextView.setVisibility(View.GONE);
229 // Display the package signature.
231 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
232 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
234 // Convert the signature to a `byte[]` `InputStream`.
235 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
237 // Display the certificate information on the screen.
239 // Instantiate a `CertificateFactory`.
240 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
242 // Generate an `X509Certificate`.
243 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
245 // Store the individual sections of the certificate that we are interested in.
246 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
247 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
248 Date startDate = x509Certificate.getNotBefore();
249 Date endDate = x509Certificate.getNotAfter();
250 int certificateVersion = x509Certificate.getVersion();
251 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
252 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
254 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
255 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
256 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
257 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
258 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
259 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
260 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
261 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
263 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
264 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
265 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
266 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
267 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
268 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
269 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
270 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
272 // Display the strings in the text boxes.
273 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
274 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
275 certificateStartDateTextView.setText(startDateStringBuilder);
276 certificateEndDateTextView.setText(endDataStringBuilder);
277 certificateVersionTextView.setText(certificateVersionStringBuilder);
278 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
279 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
280 } catch (CertificateException e) {
281 // Do nothing if there is a certificate error.
283 } catch (PackageManager.NameNotFoundException e) {
284 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
286 } else { // load a `WebView` for all the other tabs. Tab numbers start at 0.
287 // 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.
288 tabLayout = inflater.inflate(R.layout.bare_webview, container, false);
290 // Get a handle for `tabWebView`.
291 WebView tabWebView = (WebView) tabLayout;
293 // Load the tabs according to the theme.
294 if (MainWebViewActivity.darkTheme) { // The dark theme is applied.
295 // Set the background color. We have to use the deprecated `.getColor()` until API >= 23.
296 //noinspection deprecation
297 tabWebView.setBackgroundColor(getResources().getColor(R.color.gray_850));
301 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_dark.html");
305 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_dark.html");
309 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_dark.html");
313 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_dark.html");
317 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_dark.html");
321 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_dark.html");
324 } else { // The light theme is applied.
327 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions_light.html");
331 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy_light.html");
335 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog_light.html");
339 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses_light.html");
343 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors_light.html");
347 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links_light.html");
353 // Return the formatted `tabLayout`.