X-Git-Url: https://gitweb.stoutner.com/?a=blobdiff_plain;f=app%2Fsrc%2Fmain%2Fjava%2Fcom%2Fstoutner%2Fprivacybrowser%2Ffragments%2FAboutTabFragment.java;h=ad0708dedcc7e44546afd9b5a815984252536c8a;hb=3e3248fff3064cf70fc3680314bbd71bb8c72193;hp=b3e9e5a44fa4c44bbf25cf14401db0351b5ac409;hpb=61a76e491469916f2f30aebb47b98cda7cceb557;p=PrivacyBrowserAndroid.git diff --git a/app/src/main/java/com/stoutner/privacybrowser/fragments/AboutTabFragment.java b/app/src/main/java/com/stoutner/privacybrowser/fragments/AboutTabFragment.java index b3e9e5a4..ad0708de 100644 --- a/app/src/main/java/com/stoutner/privacybrowser/fragments/AboutTabFragment.java +++ b/app/src/main/java/com/stoutner/privacybrowser/fragments/AboutTabFragment.java @@ -19,6 +19,9 @@ package com.stoutner.privacybrowser.fragments; +import android.annotation.SuppressLint; +import android.content.pm.PackageManager; +import android.content.pm.Signature; import android.os.Build; import android.os.Bundle; import android.support.v4.app.Fragment; @@ -34,10 +37,20 @@ import android.widget.TextView; import com.stoutner.privacybrowser.BuildConfig; import com.stoutner.privacybrowser.R; +import java.io.ByteArrayInputStream; +import java.io.InputStream; +import java.math.BigInteger; +import java.security.Principal; +import java.security.cert.CertificateException; +import java.security.cert.CertificateFactory; +import java.security.cert.X509Certificate; +import java.text.DateFormat; +import java.util.Date; + public class AboutTabFragment extends Fragment { private int tabNumber; - // AboutTabFragment.createTab stores the tab number in the bundle arguments so it can be referenced from onCreate(). + // `AboutTabFragment.createTab` stores the tab number in the bundle arguments so it can be referenced from `onCreate()`. public static AboutTabFragment createTab(int tab) { Bundle thisTabArguments = new Bundle(); thisTabArguments.putInt("Tab", tab); @@ -51,7 +64,7 @@ public class AboutTabFragment extends Fragment { public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); - // Store the tab number in tabNumber. + // Store the tab number in `tabNumber`. tabNumber = getArguments().getInt("Tab"); } @@ -77,7 +90,14 @@ public class AboutTabFragment extends Fragment { TextView versionBuildTextView = (TextView) tabLayout.findViewById(R.id.about_version_build); TextView versionSecurityPatchTextView = (TextView) tabLayout.findViewById(R.id.about_version_securitypatch); TextView versionWebKitTextView = (TextView) tabLayout.findViewById(R.id.about_version_webkit); - TextView versionChromeText = (TextView) tabLayout.findViewById(R.id.about_version_chrome); + TextView versionChromeTextView = (TextView) tabLayout.findViewById(R.id.about_version_chrome); + TextView certificateIssuerDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_issuer_dn); + TextView certificateSubjectDNTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_subject_dn); + TextView certificateStartDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_start_date); + TextView certificateEndDateTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_end_date); + TextView certificateVersionTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_version); + TextView certificateSerialNumberTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_serial_number); + TextView certificateSignatureAlgorithmTextView = (TextView) tabLayout.findViewById(R.id.about_version_certificate_signature_algorithm); // Setup the labels. String version = getString(R.string.version) + " " + BuildConfig.VERSION_NAME + " (" + getString(R.string.version_code) + " " + Integer.toString(BuildConfig.VERSION_CODE) + ")"; @@ -90,6 +110,13 @@ public class AboutTabFragment extends Fragment { String buildLabel = getString(R.string.build) + " "; String webKitLabel = getString(R.string.webkit) + " "; String chromeLabel = getString(R.string.chrome) + " "; + String issuerDNLabel = getString(R.string.issuer_dn) + " "; + String subjectDNLabel = getString(R.string.subject_dn) + " "; + String startDateLabel = getString(R.string.start_date) + " "; + String endDateLabel = getString(R.string.end_date) + " "; + String certificateVersionLabel = getString(R.string.certificate_version) + " "; + String serialNumberLabel = getString(R.string.serial_number) + " "; + String signatureAlgorithmLabel = getString(R.string.signature_algorithm) + " "; // `webViewLayout` is only used to get the default user agent from `bare_webview`. It is not used to render content on the screen. View webViewLayout = inflater.inflate(R.layout.bare_webview, container, false); @@ -135,7 +162,7 @@ public class AboutTabFragment extends Fragment { webKitStringBuilder.setSpan(blueColorSpan, webKitLabel.length(), webKitStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); chromeStringBuilder.setSpan(blueColorSpan, chromeLabel.length(), chromeStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); - // Display the strings. + // Display the strings in the text boxes. versionNumberTextView.setText(version); versionBrandTextView.setText(brandStringBuilder); versionManufacturerTextView.setText(manufacturerStringBuilder); @@ -145,7 +172,7 @@ public class AboutTabFragment extends Fragment { versionAndroidTextView.setText(androidStringBuilder); versionBuildTextView.setText(buildStringBuilder); versionWebKitTextView.setText(webKitStringBuilder); - versionChromeText.setText(chromeStringBuilder); + versionChromeTextView.setText(chromeStringBuilder); // Build.VERSION.SECURITY_PATCH is only available for SDK_INT >= 23. if (Build.VERSION.SDK_INT >= 23) { @@ -167,6 +194,64 @@ public class AboutTabFragment extends Fragment { } else { // Hide `versionRadioTextView`. versionRadioTextView.setVisibility(View.GONE); } + + // Display the package signature. + try { + // Get the first package signature. Suppress the lint warning about the need to be careful in implementing comparison of certificates for security purposes. + @SuppressLint("PackageManagerGetSignatures") Signature packageSignature = getContext().getPackageManager().getPackageInfo(getContext().getPackageName(), PackageManager.GET_SIGNATURES).signatures[0]; + + // Convert the signature to a `byte[]` `InputStream`. + InputStream certificateByteArrayInputStream = new ByteArrayInputStream(packageSignature.toByteArray()); + + // Display the certificate information on the screen. + try { + // Instantiate a `CertificateFactory`. + CertificateFactory certificateFactory = CertificateFactory.getInstance("X509"); + + // Generate an `X509Certificate`. + X509Certificate x509Certificate = (X509Certificate) certificateFactory.generateCertificate(certificateByteArrayInputStream); + + // Store the individual sections of the certificate that we are interested in. + Principal issuerDNPrincipal = x509Certificate.getIssuerDN(); + Principal subjectDNPrincipal = x509Certificate.getSubjectDN(); + Date startDate = x509Certificate.getNotBefore(); + Date endDate = x509Certificate.getNotAfter(); + int certificateVersion = x509Certificate.getVersion(); + BigInteger serialNumberBigInteger = x509Certificate.getSerialNumber(); + String signatureAlgorithmNameString = x509Certificate.getSigAlgName(); + + // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text. + SpannableStringBuilder issuerDNStringBuilder = new SpannableStringBuilder(issuerDNLabel + issuerDNPrincipal.toString()); + SpannableStringBuilder subjectDNStringBuilder = new SpannableStringBuilder(subjectDNLabel + subjectDNPrincipal.toString()); + SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate)); + SpannableStringBuilder endDataStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate)); + SpannableStringBuilder certificateVersionStringBuilder = new SpannableStringBuilder(certificateVersionLabel + certificateVersion); + SpannableStringBuilder serialNumberStringBuilder = new SpannableStringBuilder(serialNumberLabel + serialNumberBigInteger); + SpannableStringBuilder signatureAlgorithmStringBuilder = new SpannableStringBuilder(signatureAlgorithmLabel + signatureAlgorithmNameString); + + // Setup the spans to display the device information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction. + issuerDNStringBuilder.setSpan(blueColorSpan, issuerDNLabel.length(), issuerDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + subjectDNStringBuilder.setSpan(blueColorSpan, subjectDNLabel.length(), subjectDNStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + endDataStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDataStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + certificateVersionStringBuilder.setSpan(blueColorSpan, certificateVersionLabel.length(), certificateVersionStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + serialNumberStringBuilder.setSpan(blueColorSpan, serialNumberLabel.length(), serialNumberStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + signatureAlgorithmStringBuilder.setSpan(blueColorSpan, signatureAlgorithmLabel.length(), signatureAlgorithmStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE); + + // Display the strings in the text boxes. + certificateIssuerDNTextView.setText(issuerDNStringBuilder); + certificateSubjectDNTextView.setText(subjectDNStringBuilder); + certificateStartDateTextView.setText(startDateStringBuilder); + certificateEndDateTextView.setText(endDataStringBuilder); + certificateVersionTextView.setText(certificateVersionStringBuilder); + certificateSerialNumberTextView.setText(serialNumberStringBuilder); + certificateSignatureAlgorithmTextView.setText(signatureAlgorithmStringBuilder); + } catch (CertificateException e) { + // Do nothing if there is a certificate error. + } + } catch (PackageManager.NameNotFoundException e) { + // Do nothing if `PackageManager` says Privacy Browser isn't installed. + } } else { // load a WebView for all the other tabs. Tab numbers start at 0. // 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.