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

   1 /**
   2  * Copyright 2016 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.content.Context;
  26 import android.content.DialogInterface;
  27 import android.net.http.SslCertificate;
  28 import android.net.http.SslError;
  29 import android.os.Bundle;
  30 import android.support.annotation.NonNull;
  31 import android.support.v7.app.AppCompatDialogFragment;
  32 import android.text.SpannableStringBuilder;
  33 import android.text.Spanned;
  34 import android.text.style.ForegroundColorSpan;
  35 import android.view.LayoutInflater;
  36 import android.widget.TextView;
  37
  38 import com.stoutner.privacybrowser.R;
  39
  40 import java.util.Date;
  41
  42 public class SslCertificateError extends AppCompatDialogFragment {
  43
  44     private String primaryError;
  45     private String urlWithError;
  46     private String issuedToCName;
  47     private String issuedToOName;
  48     private String issuedToUName;
  49     private String issuedByCName;
  50     private String issuedByOName;
  51     private String issuedByUName;
  52     private String startDate;
  53     private String endDate;
  54
  55     public static SslCertificateError displayDialog(SslError error) {
  56         // Get the various components of the SSL error message.
  57         int primaryErrorIntForBundle = error.getPrimaryError();
  58         String urlWithErrorForBundle = error.getUrl();
  59         SslCertificate sslCertificate = error.getCertificate();
  60         String issuedToCNameForBundle = sslCertificate.getIssuedTo().getCName();
  61         String issuedToONameForBundle = sslCertificate.getIssuedTo().getOName();
  62         String issuedToUNameForBundle = sslCertificate.getIssuedTo().getUName();
  63         String issuedByCNameForBundle = sslCertificate.getIssuedBy().getCName();
  64         String issuedByONameForBundle = sslCertificate.getIssuedBy().getOName();
  65         String issuedByUNameForBundle = sslCertificate.getIssuedBy().getUName();
  66         Date startDateForBundle = sslCertificate.getValidNotBeforeDate();
  67         Date endDateForBundle = sslCertificate.getValidNotAfterDate();
  68
  69         // Store the SSL error message components in a `Bundle`.
  70         Bundle argumentsBundle = new Bundle();
  71         argumentsBundle.putInt("PrimaryErrorInt", primaryErrorIntForBundle);
  72         argumentsBundle.putString("UrlWithError", urlWithErrorForBundle);
  73         argumentsBundle.putString("IssuedToCName", issuedToCNameForBundle);
  74         argumentsBundle.putString("IssuedToOName", issuedToONameForBundle);
  75         argumentsBundle.putString("IssuedToUName", issuedToUNameForBundle);
  76         argumentsBundle.putString("IssuedByCName", issuedByCNameForBundle);
  77         argumentsBundle.putString("IssuedByOName", issuedByONameForBundle);
  78         argumentsBundle.putString("IssuedByUName", issuedByUNameForBundle);
  79         argumentsBundle.putString("StartDate", startDateForBundle.toString());
  80         argumentsBundle.putString("EndDate", endDateForBundle.toString());
  81
  82         // Add `argumentsBundle` to this instance of `SslCertificateError`.
  83         SslCertificateError thisSslCertificateErrorDialog = new SslCertificateError();
  84         thisSslCertificateErrorDialog.setArguments(argumentsBundle);
  85         return thisSslCertificateErrorDialog;
  86     }
  87
  88     @Override
  89     public void onCreate(Bundle savedInstanceState) {
  90         super.onCreate(savedInstanceState);
  91
  92         // Save the components of the SSL error message in class variables.
  93         urlWithError = getArguments().getString("UrlWithError");
  94         issuedToCName = getArguments().getString("IssuedToCName");
  95         issuedToOName = getArguments().getString("IssuedToOName");
  96         issuedToUName = getArguments().getString("IssuedToUName");
  97         issuedByCName = getArguments().getString("IssuedByCName");
  98         issuedByOName = getArguments().getString("IssuedByOName");
  99         issuedByUName = getArguments().getString("IssuedByUName");
 100         startDate = getArguments().getString("StartDate");
 101         endDate = getArguments().getString("EndDate");
 102
 103         // Get the appropriate string for `primaryError.
 104         int primaryErrorInt = getArguments().getInt("PrimaryErrorInt");
 105         switch (primaryErrorInt) {
 106             case SslError.SSL_NOTYETVALID:
 107                 primaryError = getString(R.string.future_certificate);
 108                 break;
 109
 110             case SslError.SSL_EXPIRED:
 111                 primaryError = getString(R.string.expired_certificate);
 112                 break;
 113
 114             case SslError.SSL_IDMISMATCH:
 115                 primaryError = getString(R.string.cn_mismatch);
 116                 break;
 117
 118             case SslError.SSL_UNTRUSTED:
 119                 primaryError = getString(R.string.untrusted);
 120                 break;
 121
 122             case SslError.SSL_DATE_INVALID:
 123                 primaryError = getString(R.string.invalid_date);
 124                 break;
 125
 126             case SslError.SSL_INVALID:
 127                 primaryError = getString(R.string.invalid_certificate);
 128                 break;
 129         }
 130     }
 131
 132     // The public interface is used to send information back to the parent activity.
 133     public interface SslCertificateErrorListener {
 134         void onSslErrorCancel();
 135
 136         void onSslErrorProceed();
 137     }
 138
 139     // `sslCertificateErrorListener` is used in `onAttach` and `onCreateDialog`.
 140     private SslCertificateErrorListener sslCertificateErrorListener;
 141
 142     // Check to make sure that the parent activity implements the listener.
 143     public void onAttach(Context context) {
 144         super.onAttach(context);
 145
 146         try {
 147             sslCertificateErrorListener = (SslCertificateErrorListener) context;
 148         } catch(ClassCastException exception) {
 149             throw new ClassCastException(context.toString() + " must implement SslCertificateErrorListener");
 150         }
 151     }
 152
 153     // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
 154     @SuppressLint("InflateParams")
 155     @Override
 156     @NonNull
 157     public Dialog onCreateDialog(Bundle savedInstanceState) {
 158         // Get the activity's layout inflater.
 159         LayoutInflater layoutInflater = getActivity().getLayoutInflater();
 160
 161         // Use `AlertDialog.Builder` to create the `AlertDialog`.  `R.style.LightAlertDialog` formats the color of the button text.
 162         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.LightAlertDialog);
 163         dialogBuilder.setTitle(R.string.ssl_certificate_error);
 164         // The parent view is `null` because it will be assigned by `AlertDialog`.
 165         dialogBuilder.setView(layoutInflater.inflate(R.layout.ssl_certificate_error, null));
 166
 167         // Set an `onClick` listener on the negative button.  `null` doesn't do anything extra when the button is pressed.  The `Dialog` will automatically close.
 168         dialogBuilder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
 169             @Override
 170             public void onClick(DialogInterface dialog, int which) {
 171                 sslCertificateErrorListener.onSslErrorCancel();
 172             }
 173         });
 174
 175         // Set an `onClick` listener on the positive button.
 176         dialogBuilder.setPositiveButton(R.string.proceed, new DialogInterface.OnClickListener() {
 177             @Override
 178             public void onClick(DialogInterface dialog, int which) {
 179                 sslCertificateErrorListener.onSslErrorProceed();
 180             }
 181         });
 182
 183
 184         // Create an `AlertDialog` from the `AlertDialog.Builder`.
 185         AlertDialog alertDialog = dialogBuilder.create();
 186
 187         // We have to show the `AlertDialog` before we can modify the content.
 188         alertDialog.show();
 189
 190         // Get handles for the `TextViews`
 191         TextView primaryErrorTextView = (TextView) alertDialog.findViewById(R.id.primary_error);
 192         TextView urlTextView = (TextView) alertDialog.findViewById(R.id.url_error_dialog);
 193         TextView issuedToCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_cname_error_dialog);
 194         TextView issuedToONameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_oname_error_dialog);
 195         TextView issuedToUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_uname_error_dialog);
 196         TextView issuedByCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_cname_error_dialog);
 197         TextView issuedByONameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_oname_error_dialog);
 198         TextView issuedByUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_uname_error_dialog);
 199         TextView startDateTextView = (TextView) alertDialog.findViewById(R.id.start_date_error_dialog);
 200         TextView endDateTextView = (TextView) alertDialog.findViewById(R.id.end_date_error_dialog);
 201
 202         // Setup the common strings.
 203         String urlLabel = getString(R.string.url_label) + "  ";
 204         String cNameLabel = getString(R.string.common_name) + "  ";
 205         String oNameLabel = getString(R.string.organization) + "  ";
 206         String uNameLabel = getString(R.string.organizational_unit) + "  ";
 207         String startDateLabel = getString(R.string.start_date) + "  ";
 208         String endDateLabel = getString(R.string.end_date) + "  ";
 209
 210         // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
 211         SpannableStringBuilder urlStringBuilder = new SpannableStringBuilder(urlLabel + urlWithError);
 212         SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCName);
 213         SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToOName);
 214         SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUName);
 215         SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCName);
 216         SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByOName);
 217         SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUName);
 218         SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + startDate);
 219         SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder((endDateLabel + endDate));
 220
 221         // Create a blue `ForegroundColorSpan`.  We have to use the deprecated `getColor` until API >= 23.
 222         @SuppressWarnings("deprecation") ForegroundColorSpan blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
 223
 224         // Setup the spans to display the certificate information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
 225         urlStringBuilder.setSpan(blueColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 226         issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 227         issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 228         issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 229         issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 230         issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 231         issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 232         startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 233         endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
 234
 235
 236         // Display the strings.
 237         primaryErrorTextView.setText(primaryError);
 238         urlTextView.setText(urlStringBuilder);
 239         issuedToCNameTextView.setText(issuedToCNameStringBuilder);
 240         issuedToONameTextView.setText(issuedToONameStringBuilder);
 241         issuedToUNameTextView.setText(issuedToUNameStringBuilder);
 242         issuedByCNameTextView.setText(issuedByCNameStringBuilder);
 243         issuedByONameTextView.setText(issuedByONameStringBuilder);
 244         issuedByUNameTextView.setText(issuedByUNameStringBuilder);
 245         startDateTextView.setText(startDateStringBuilder);
 246         endDateTextView.setText(endDateStringBuilder);
 247
 248         // `onCreateDialog` requires the return of an `AlertDialog`.
 249         return alertDialog;
 250     }
 251 }