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;
40 import java.io.ByteArrayInputStream;
41 import java.io.InputStream;
42 import java.math.BigInteger;
43 import java.security.Principal;
44 import java.security.cert.CertificateException;
45 import java.security.cert.CertificateFactory;
46 import java.security.cert.X509Certificate;
47 import java.text.DateFormat;
48 import java.util.Date;
50 public class AboutTabFragment extends Fragment {
51 private int tabNumber;
53 // `AboutTabFragment.createTab` stores the tab number in the bundle arguments so it can be referenced from `onCreate()`.
54 public static AboutTabFragment createTab(int tab) {
55 Bundle thisTabArguments = new Bundle();
56 thisTabArguments.putInt("Tab", tab);
58 AboutTabFragment thisTab = new AboutTabFragment();
59 thisTab.setArguments(thisTabArguments);
64 public void onCreate(Bundle savedInstanceState) {
65 super.onCreate(savedInstanceState);
67 // Store the tab number in `tabNumber`.
68 tabNumber = getArguments().getInt("Tab");
72 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
75 // Load the tabs. Tab numbers start at 0.
76 if (tabNumber == 0) { // Load the about tab.
77 // Setting false at the end of inflater.inflate does not attach the inflated layout as a child of container.
78 // The fragment will take care of attaching the root automatically.
79 tabLayout = inflater.inflate(R.layout.about_tab_version, container, false);
81 // Get handles for the `TextViews`.
82 TextView versionNumberTextView = (TextView) tabLayout.findViewById(R.id.about_version_number);
83 TextView versionBrandTextView = (TextView) tabLayout.findViewById(R.id.about_version_brand);
84 TextView versionManufacturerTextView = (TextView) tabLayout.findViewById(R.id.about_version_manufacturer);
85 TextView versionModelTextView = (TextView) tabLayout.findViewById(R.id.about_version_model);
86 TextView versionDeviceTextView = (TextView) tabLayout.findViewById(R.id.about_version_device);
87 TextView versionBootloaderTextView = (TextView) tabLayout.findViewById(R.id.about_version_bootloader);
88 TextView versionRadioTextView = (TextView) tabLayout.findViewById(R.id.about_version_radio);
89 TextView versionAndroidTextView = (TextView) tabLayout.findViewById(R.id.about_version_android);
90 TextView versionBuildTextView = (TextView) tabLayout.findViewById(R.id.about_version_build);
91 TextView versionSecurityPatchTextView = (TextView) tabLayout.findViewById(R.id.about_version_securitypatch);
92 TextView versionWebKitTextView = (TextView) tabLayout.findViewById(R.id.about_version_webkit);
93 TextView versionChromeTextView = (TextView) tabLayout.findViewById(R.id.about_version_chrome);
94 TextView certificateIssuerDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_issuer_dn);
95 TextView certificateSubjectDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_subject_dn);
96 TextView certificateStartDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_start_date);
97 TextView certificateEndDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_end_date);
98 TextView certificateVersionTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_version);
99 TextView certificateSerialNumberTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_serial_number);
100 TextView certificateSignatureAlgorithmTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_signature_algorithm);
103 String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")";
104 String brandLabel = getString(R.string.brand) + " ";
105 String manufacturerLabel = getString(R.string.manufacturer) + " ";
106 String modelLabel = getString(R.string.model) + " ";
107 String deviceLabel = getString(R.string.device) + " ";
108 String bootloaderLabel = getString(R.string.bootloader) + " ";
109 String androidLabel = getString(R.string.android) + " ";
110 String buildLabel = getString(R.string.build) + " ";
111 String webKitLabel = getString(R.string.webkit) + " ";
112 String chromeLabel = getString(R.string.chrome) + " ";
113 String issuerDNLabel = getString(R.string.issuer_dn) + " ";
114 String subjectDNLabel = getString(R.string.subject_dn) + " ";
115 String startDateLabel = getString(R.string.start_date) + " ";
116 String endDateLabel = getString(R.string.end_date) + " ";
117 String certificateVersionLabel = getString(R.string.certificate_version) + " ";
118 String serialNumberLabel = getString(R.string.serial_number) + " ";
119 String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " ";
121 // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen.
122 View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false);
123 WebView tabLayoutWebView = (WebView) webViewLayout.findViewById(R.id.bare_webview);
124 String userAgentString = tabLayoutWebView.getSettings().getUserAgentString();
126 // Get the device's information and store it in strings.
127 String brand = Build.BRAND;
128 String manufacturer = Build.MANUFACTURER;
129 String model = Build.MODEL;
130 String device = Build.DEVICE;
131 String bootloader = Build.BOOTLOADER;
132 String radio = Build.getRadioVersion();
133 String android = Build.VERSION.RELEASE + " (" + getString(R.string.api) + " " + Integer.toString(Build.VERSION.SDK_INT) + ")";
134 String build = Build.DISPLAY;
135 // Select the substring that begins after "Safari/" and goes to the end of the string.
136 String webKit = userAgentString.substring(userAgentString.indexOf("Safari/") + 7);
137 // Select the substring that begins after "Chrome/" and goes until the next " ".
138 String chrome = userAgentString.substring(userAgentString.indexOf("Chrome/") + 7, userAgentString.indexOf(" ", userAgentString.indexOf("Chrome/")));
140 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
141 SpannableStringBuilder brandStringBuilder = new SpannableStringBuilder(brandLabel + brand);
142 SpannableStringBuilder manufacturerStringBuilder = new SpannableStringBuilder(manufacturerLabel + manufacturer);
143 SpannableStringBuilder modelStringBuilder = new SpannableStringBuilder(modelLabel + model);
144 SpannableStringBuilder deviceStringBuilder = new SpannableStringBuilder(deviceLabel + device);
145 SpannableStringBuilder bootloaderStringBuilder = new SpannableStringBuilder(bootloaderLabel + bootloader);
146 SpannableStringBuilder androidStringBuilder = new SpannableStringBuilder(androidLabel + android);
147 SpannableStringBuilder buildStringBuilder = new SpannableStringBuilder(buildLabel + build);
148 SpannableStringBuilder webKitStringBuilder = new SpannableStringBuilder(webKitLabel + webKit);
149 SpannableStringBuilder chromeStringBuilder = new SpannableStringBuilder(chromeLabel + chrome);
151 // Create a blue `ForegroundColorSpan`. We have to use the deprecated `getColor` until API >= 23.
152 @SuppressWarnings("deprecation") ForegroundColorSpan blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
154 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
155 brandStringBuilder.setSpan(blueColorSpan, brandLabel.length(), brandStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
156 manufacturerStringBuilder.setSpan(blueColorSpan, manufacturerLabel.length(), manufacturerStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
157 modelStringBuilder.setSpan(blueColorSpan, modelLabel.length(), modelStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
158 deviceStringBuilder.setSpan(blueColorSpan, deviceLabel.length(), deviceStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
159 bootloaderStringBuilder.setSpan(blueColorSpan, bootloaderLabel.length(), bootloaderStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
160 androidStringBuilder.setSpan(blueColorSpan, androidLabel.length(), androidStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
161 buildStringBuilder.setSpan(blueColorSpan, buildLabel.length(), buildStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
162 webKitStringBuilder.setSpan(blueColorSpan, webKitLabel.length(), webKitStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
163 chromeStringBuilder.setSpan(blueColorSpan, chromeLabel.length(), chromeStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
165 // Display the strings in the text boxes.
166 versionNumberTextView.setText(version);
167 versionBrandTextView.setText(brandStringBuilder);
168 versionManufacturerTextView.setText(manufacturerStringBuilder);
169 versionModelTextView.setText(modelStringBuilder);
170 versionDeviceTextView.setText(deviceStringBuilder);
171 versionBootloaderTextView.setText(bootloaderStringBuilder);
172 versionAndroidTextView.setText(androidStringBuilder);
173 versionBuildTextView.setText(buildStringBuilder);
174 versionWebKitTextView.setText(webKitStringBuilder);
175 versionChromeTextView.setText(chromeStringBuilder);
177 // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23.
178 if (Build.VERSION.SDK_INT >= 23) {
179 String securityPatchLabel = getString(R.string.security_patch) + " ";
180 String securityPatch = Build.VERSION.SECURITY_PATCH;
181 SpannableStringBuilder securityPatchStringBuilder = new SpannableStringBuilder(securityPatchLabel + securityPatch);
182 securityPatchStringBuilder.setSpan(blueColorSpan, securityPatchLabel.length(), securityPatchStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
183 versionSecurityPatchTextView.setText(securityPatchStringBuilder);
184 } else { // Hide `versionSecurityPatchTextView`.
185 versionSecurityPatchTextView.setVisibility(View.GONE);
188 // Only populate `versionRadioTextView` if there is a radio in the device.
189 if (!radio.equals("")) {
190 String radioLabel = getString(R.string.radio) + " ";
191 SpannableStringBuilder radioStringBuilder = new SpannableStringBuilder(radioLabel + radio);
192 radioStringBuilder.setSpan(blueColorSpan, radioLabel.length(), radioStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
193 versionRadioTextView.setText(radioStringBuilder);
194 } else { // Hide `versionRadioTextView`.
195 versionRadioTextView.setVisibility(View.GONE);
198 // Display the package signature.
200 // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes.
201 @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0];
203 // Convert the signature to a `byte[]` `InputStream`.
204 InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray());
206 // Display the certificate information on the screen.
208 // Instantiate a `CertificateFactory`.
209 CertificateFactory certificateFactory = CertificateFactory.getInstance("X509");
211 // Generate an `X509Certificate`.
212 X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream);
214 // Store the individual sections of the certificate that we are interested in.
215 Principal issuerDNPrincipal = x509Certificate.getIssuerDN();
216 Principal subjectDNPrincipal = x509Certificate.getSubjectDN();
217 Date startDate = x509Certificate.getNotBefore();
218 Date endDate = x509Certificate.getNotAfter();
219 int certificateVersion = x509Certificate.getVersion();
220 BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber();
221 String signatureAlgorithmNameString = x509Certificate.getSigAlgName();
223 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
224 SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString());
225 SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString());
226 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
227 SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
228 SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion);
229 SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger);
230 SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString);
232 // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
233 issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
234 subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
235 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
236 endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
237 certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
238 serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
239 signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
241 // Display the strings in the text boxes.
242 certificateIssuerDNTextView.setText(issuerDNStringBuilder);
243 certificateSubjectDNTextView.setText(subjectDNStringBuilder);
244 certificateStartDateTextView.setText(startDateStringBuilder);
245 certificateEndDateTextView.setText(endDataStringBuilder);
246 certificateVersionTextView.setText(certificateVersionStringBuilder);
247 certificateSerialNumberTextView.setText(serialNumberStringBuilder);
248 certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder);
249 } catch (CertificateException e) {
250 // Do nothing if there is a certificate error.
252 } catch (PackageManager.NameNotFoundException e) {
253 // Do nothing if `PackageManager` says Privacy Browser isn't installed.
255 } else { // load a WebView for all the other tabs. Tab numbers start at 0.
256 // Setting false at the end of inflater.inflate does not attach the inflated layout as a child of container.
257 // The fragment will take care of attaching the root automatically.
258 tabLayout = inflater.inflate(R.layout.bare_webview, container, false);
259 WebView tabWebView = (WebView) tabLayout;
263 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_permissions.html");
267 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_privacy_policy.html");
271 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_changelog.html");
275 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_licenses.html");
279 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_contributors.html");
283 tabWebView.loadUrl("file:///android_asset/" + getString(R.string.android_asset_path) + "/about_links.html");