app/src/main/java/com/stoutner/privacybrowser/dialogs/ViewSslCertificateDialog.java

   1 /*
   2  * Copyright © 2016-2017 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.dialogs;
  21
  22 import android.annotation.SuppressLint;
  23 import android.app.AlertDialog;
  24 import android.app.Dialog;
  25 import android.app.DialogFragment;
  26 import android.graphics.drawable.BitmapDrawable;
  27 import android.graphics.drawable.Drawable;
  28 import android.net.http.SslCertificate;
  29 import android.os.Bundle;
  30 import android.text.SpannableStringBuilder;
  31 import android.text.Spanned;
  32 import android.text.style.ForegroundColorSpan;
  33 import android.view.LayoutInflater;
  34 import android.widget.TextView;
  35
  36 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
  37 import com.stoutner.privacybrowser.R;
  38
  39 import java.text.DateFormat;
  40 import java.util.Calendar;
  41 import java.util.Date;
  42
  43 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
  44 @SuppressLint("InflateParams")
  45 public class ViewSslCertificateDialog extends DialogFragment {
  46     public Dialog onCreateDialog(Bundle savedInstanceState) {
  47         // Get the activity's layout inflater.
  48         LayoutInflater layoutInflater   = getActivity().getLayoutInflater();
  49
  50         // Create a drawable version of the favorite icon.
  51         Drawable favoriteIconDrawable = new BitmapDrawable(getResources(), MainWebViewActivity.favoriteIconBitmap);
  52
  53         // Use `AlertDialog.Builder` to create the `AlertDialog`.  `R.style.LightAlertDialog` formats the color of the button text.
  54         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.LightAlertDialog);
  55         dialogBuilder.setIcon(favoriteIconDrawable);
  56
  57         // Set an `onClick` listener on the negative button.  Using `null` closes the dialog without doing anything else.
  58         dialogBuilder.setNegativeButton(R.string.close, null);
  59
  60         // Check to see if the website is encrypted.
  61         if (MainWebViewActivity.sslCertificate == null) {  // The website is not encrypted.
  62             // Set the title.
  63             dialogBuilder.setTitle(R.string.unencrypted_website);
  64
  65             // Set the Layout.  The parent view is `null` because it will be assigned by `AlertDialog`.
  66             dialogBuilder.setView(layoutInflater.inflate(R.layout.unencrypted_website, null));
  67
  68             // Create an `AlertDialog` from the `AlertDialog.Builder`
  69             final AlertDialog alertDialog = dialogBuilder.create();
  70
  71             // Show `alertDialog`.
  72             alertDialog.show();
  73
  74             // `onCreateDialog` requires the return of an `AlertDialog`.
  75             return alertDialog;
  76
  77         } else {  // Display the SSL certificate information
  78             // Set the title.
  79             dialogBuilder.setTitle(R.string.ssl_certificate);
  80
  81             // Set the layout.  The parent view is `null` because it will be assigned by `AlertDialog`.
  82             dialogBuilder.setView(layoutInflater.inflate(R.layout.view_ssl_certificate, null));
  83
  84             // Create an `AlertDialog` from the `AlertDialog.Builder`
  85             final AlertDialog alertDialog = dialogBuilder.create();
  86
  87             // We need to show the `AlertDialog` before we can modify items in the layout.
  88             alertDialog.show();
  89
  90             // Get handles for the `TextViews`.
  91             TextView issuedToCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_cname);
  92             TextView issuedToONameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_oname);
  93             TextView issuedToUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_uname);
  94             TextView issuedByCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_cname);
  95             TextView issuedByONameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_oname);
  96             TextView issuedByUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_uname);
  97             TextView startDateTextView = (TextView) alertDialog.findViewById(R.id.start_date);
  98             TextView endDateTextView = (TextView) alertDialog.findViewById(R.id.end_date);
  99
 100             // Setup the labels.
 101             String cNameLabel = getString(R.string.common_name) + "  ";
 102             String oNameLabel = getString(R.string.organization) + "  ";
 103             String uNameLabel = getString(R.string.organizational_unit) + "  ";
 104             String startDateLabel = getString(R.string.start_date) + "  ";
 105             String endDateLabel = getString(R.string.end_date) + "  ";
 106
 107             // Get the SSL certificate.
 108             SslCertificate sslCertificate = MainWebViewActivity.sslCertificate;
 109
 110             // Get the strings from the SSL certificate.
 111             String issuedToCNameString = sslCertificate.getIssuedTo().getCName();
 112             String issuedToONameString = sslCertificate.getIssuedTo().getOName();
 113             String issuedToUNameString = sslCertificate.getIssuedTo().getUName();
 114             String issuedByCNameString = sslCertificate.getIssuedBy().getCName();
 115             String issuedByONameString = sslCertificate.getIssuedBy().getOName();
 116             String issuedByUNameString = sslCertificate.getIssuedBy().getUName();
 117             Date startDate = sslCertificate.getValidNotBeforeDate();
 118             Date endDate = sslCertificate.getValidNotAfterDate();
 119
 120             // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
 121             SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCNameString);
 122             SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToONameString);
 123             SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUNameString);
 124             SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCNameString);
 125             SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByONameString);
 126             SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUNameString);
 127             SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDate));
 128             SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder(endDateLabel + DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDate));
 129
 130             // Create a blue `ForegroundColorSpan`.  We have to use the deprecated `getColor` until API >= 23.
 131             @SuppressWarnings("deprecation") ForegroundColorSpan blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
 132             @SuppressWarnings("deprecation") ForegroundColorSpan redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
 133
 134             // Setup the spans to display the certificate information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 135             issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 136             issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 137             issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 138             issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 139             issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 140             issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 141
 142             Date currentDate = Calendar.getInstance().getTime();
 143
 144             //  Format the start date color.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 145             if (startDate.after(currentDate)) {  // The certificate start date is in the future.
 146                 startDateStringBuilder.setSpan(redColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 147             } else {  // The certificate start date is in the past.
 148                 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 149             }
 150
 151             // Format the end date color.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 152             if (endDate.before(currentDate)) {  // The certificate end date is in the past.
 153                 endDateStringBuilder.setSpan(redColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 154             } else {  // The certificate end date is in the future.
 155                 endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 156             }
 157
 158             // Display the strings.
 159             issuedToCNameTextView.setText(issuedToCNameStringBuilder);
 160             issuedToONameTextView.setText(issuedToONameStringBuilder);
 161             issuedToUNameTextView.setText(issuedToUNameStringBuilder);
 162             issuedByCNameTextView.setText(issuedByCNameStringBuilder);
 163             issuedByONameTextView.setText(issuedByONameStringBuilder);
 164             issuedByUNameTextView.setText(issuedByUNameStringBuilder);
 165             startDateTextView.setText(startDateStringBuilder);
 166             endDateTextView.setText(endDateStringBuilder);
 167
 168             // `onCreateDialog` requires the return of an `AlertDialog`.
 169             return alertDialog;
 170         }
 171     }
 172 }