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.dialogs;
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 // We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <= 22.
32 import android.support.v7.app.AppCompatDialogFragment;
33 import android.text.SpannableStringBuilder;
34 import android.text.Spanned;
35 import android.text.style.ForegroundColorSpan;
36 import android.view.LayoutInflater;
37 import android.widget.TextView;
39 import com.stoutner.privacybrowser.R;
41 import java.text.DateFormat;
42 import java.util.Date;
44 public class SslCertificateErrorDialog extends AppCompatDialogFragment {
46 private String primaryError;
47 private String urlWithError;
48 private String issuedToCName;
49 private String issuedToOName;
50 private String issuedToUName;
51 private String issuedByCName;
52 private String issuedByOName;
53 private String issuedByUName;
54 private String startDate;
55 private String endDate;
57 public static SslCertificateErrorDialog displayDialog(SslError error) {
58 // Get the various components of the SSL error message.
59 int primaryErrorIntForBundle = error.getPrimaryError();
60 String urlWithErrorForBundle = error.getUrl();
61 SslCertificate sslCertificate = error.getCertificate();
62 String issuedToCNameForBundle = sslCertificate.getIssuedTo().getCName();
63 String issuedToONameForBundle = sslCertificate.getIssuedTo().getOName();
64 String issuedToUNameForBundle = sslCertificate.getIssuedTo().getUName();
65 String issuedByCNameForBundle = sslCertificate.getIssuedBy().getCName();
66 String issuedByONameForBundle = sslCertificate.getIssuedBy().getOName();
67 String issuedByUNameForBundle = sslCertificate.getIssuedBy().getUName();
68 Date startDateForBundle = sslCertificate.getValidNotBeforeDate();
69 Date endDateForBundle = sslCertificate.getValidNotAfterDate();
71 // Store the SSL error message components in a `Bundle`.
72 Bundle argumentsBundle = new Bundle();
73 argumentsBundle.putInt("PrimaryErrorInt", primaryErrorIntForBundle);
74 argumentsBundle.putString("UrlWithError", urlWithErrorForBundle);
75 argumentsBundle.putString("IssuedToCName", issuedToCNameForBundle);
76 argumentsBundle.putString("IssuedToOName", issuedToONameForBundle);
77 argumentsBundle.putString("IssuedToUName", issuedToUNameForBundle);
78 argumentsBundle.putString("IssuedByCName", issuedByCNameForBundle);
79 argumentsBundle.putString("IssuedByOName", issuedByONameForBundle);
80 argumentsBundle.putString("IssuedByUName", issuedByUNameForBundle);
81 argumentsBundle.putString("StartDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(startDateForBundle));
82 argumentsBundle.putString("EndDate", DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.LONG).format(endDateForBundle));
84 // Add `argumentsBundle` to this instance of `SslCertificateErrorDialog`.
85 SslCertificateErrorDialog thisSslCertificateErrorDialog = new SslCertificateErrorDialog();
86 thisSslCertificateErrorDialog.setArguments(argumentsBundle);
87 return thisSslCertificateErrorDialog;
91 public void onCreate(Bundle savedInstanceState) {
92 super.onCreate(savedInstanceState);
94 // Save the components of the SSL error message in class variables.
95 urlWithError = getArguments().getString("UrlWithError");
96 issuedToCName = getArguments().getString("IssuedToCName");
97 issuedToOName = getArguments().getString("IssuedToOName");
98 issuedToUName = getArguments().getString("IssuedToUName");
99 issuedByCName = getArguments().getString("IssuedByCName");
100 issuedByOName = getArguments().getString("IssuedByOName");
101 issuedByUName = getArguments().getString("IssuedByUName");
102 startDate = getArguments().getString("StartDate");
103 endDate = getArguments().getString("EndDate");
105 // Get the appropriate string for `primaryError.
106 int primaryErrorInt = getArguments().getInt("PrimaryErrorInt");
107 switch (primaryErrorInt) {
108 case SslError.SSL_NOTYETVALID:
109 primaryError = getString(R.string.future_certificate);
112 case SslError.SSL_EXPIRED:
113 primaryError = getString(R.string.expired_certificate);
116 case SslError.SSL_IDMISMATCH:
117 primaryError = getString(R.string.cn_mismatch);
120 case SslError.SSL_UNTRUSTED:
121 primaryError = getString(R.string.untrusted);
124 case SslError.SSL_DATE_INVALID:
125 primaryError = getString(R.string.invalid_date);
128 case SslError.SSL_INVALID:
129 primaryError = getString(R.string.invalid_certificate);
134 // The public interface is used to send information back to the parent activity.
135 public interface SslCertificateErrorListener {
136 void onSslErrorCancel();
138 void onSslErrorProceed();
141 // `sslCertificateErrorListener` is used in `onAttach` and `onCreateDialog`.
142 private SslCertificateErrorListener sslCertificateErrorListener;
144 // Check to make sure that the parent activity implements the listener.
145 public void onAttach(Context context) {
146 super.onAttach(context);
149 sslCertificateErrorListener = (SslCertificateErrorListener) context;
150 } catch(ClassCastException exception) {
151 throw new ClassCastException(context.toString() + " must implement SslCertificateErrorListener");
155 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
156 @SuppressLint("InflateParams")
159 public Dialog onCreateDialog(Bundle savedInstanceState) {
160 // Get the activity's layout inflater.
161 LayoutInflater layoutInflater = getActivity().getLayoutInflater();
163 // Use `AlertDialog.Builder` to create the `AlertDialog`. `R.style.LightAlertDialog` formats the color of the button text.
164 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.LightAlertDialog);
165 dialogBuilder.setTitle(R.string.ssl_certificate_error);
166 // The parent view is `null` because it will be assigned by `AlertDialog`.
167 dialogBuilder.setView(layoutInflater.inflate(R.layout.ssl_certificate_error, null));
169 // Set an `onClick` listener on the negative button. `null` doesn't do anything extra when the button is pressed. The `Dialog` will automatically close.
170 dialogBuilder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
172 public void onClick(DialogInterface dialog, int which) {
173 sslCertificateErrorListener.onSslErrorCancel();
177 // Set an `onClick` listener on the positive button.
178 dialogBuilder.setPositiveButton(R.string.proceed, new DialogInterface.OnClickListener() {
180 public void onClick(DialogInterface dialog, int which) {
181 sslCertificateErrorListener.onSslErrorProceed();
186 // Create an `AlertDialog` from the `AlertDialog.Builder`.
187 AlertDialog alertDialog = dialogBuilder.create();
189 // We have to show the `AlertDialog` before we can modify the content.
192 // Get handles for the `TextViews`
193 TextView primaryErrorTextView = (TextView) alertDialog.findViewById(R.id.primary_error);
194 TextView urlTextView = (TextView) alertDialog.findViewById(R.id.url_error_dialog);
195 TextView issuedToCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_cname_error_dialog);
196 TextView issuedToONameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_oname_error_dialog);
197 TextView issuedToUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_to_uname_error_dialog);
198 TextView issuedByCNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_cname_error_dialog);
199 TextView issuedByONameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_oname_error_dialog);
200 TextView issuedByUNameTextView = (TextView) alertDialog.findViewById(R.id.issued_by_uname_error_dialog);
201 TextView startDateTextView = (TextView) alertDialog.findViewById(R.id.start_date_error_dialog);
202 TextView endDateTextView = (TextView) alertDialog.findViewById(R.id.end_date_error_dialog);
204 // Setup the common strings.
205 String urlLabel = getString(R.string.url_label) + " ";
206 String cNameLabel = getString(R.string.common_name) + " ";
207 String oNameLabel = getString(R.string.organization) + " ";
208 String uNameLabel = getString(R.string.organizational_unit) + " ";
209 String startDateLabel = getString(R.string.start_date) + " ";
210 String endDateLabel = getString(R.string.end_date) + " ";
212 // Create a `SpannableStringBuilder` for each `TextView` that needs multiple colors of text.
213 SpannableStringBuilder urlStringBuilder = new SpannableStringBuilder(urlLabel + urlWithError);
214 SpannableStringBuilder issuedToCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedToCName);
215 SpannableStringBuilder issuedToONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedToOName);
216 SpannableStringBuilder issuedToUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedToUName);
217 SpannableStringBuilder issuedByCNameStringBuilder = new SpannableStringBuilder(cNameLabel + issuedByCName);
218 SpannableStringBuilder issuedByONameStringBuilder = new SpannableStringBuilder(oNameLabel + issuedByOName);
219 SpannableStringBuilder issuedByUNameStringBuilder = new SpannableStringBuilder(uNameLabel + issuedByUName);
220 SpannableStringBuilder startDateStringBuilder = new SpannableStringBuilder(startDateLabel + startDate);
221 SpannableStringBuilder endDateStringBuilder = new SpannableStringBuilder((endDateLabel + endDate));
223 // Create a blue `ForegroundColorSpan`. We have to use the deprecated `getColor` until API >= 23.
224 @SuppressWarnings("deprecation") ForegroundColorSpan blueColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.blue_700));
226 // Setup the spans to display the certificate information in blue. `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
227 urlStringBuilder.setSpan(blueColorSpan, urlLabel.length(), urlStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
228 issuedToCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedToCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
229 issuedToONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedToONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
230 issuedToUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedToUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
231 issuedByCNameStringBuilder.setSpan(blueColorSpan, cNameLabel.length(), issuedByCNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
232 issuedByONameStringBuilder.setSpan(blueColorSpan, oNameLabel.length(), issuedByONameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
233 issuedByUNameStringBuilder.setSpan(blueColorSpan, uNameLabel.length(), issuedByUNameStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
234 startDateStringBuilder.setSpan(blueColorSpan, startDateLabel.length(), startDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
235 endDateStringBuilder.setSpan(blueColorSpan, endDateLabel.length(), endDateStringBuilder.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
238 // Display the strings.
239 primaryErrorTextView.setText(primaryError);
240 urlTextView.setText(urlStringBuilder);
241 issuedToCNameTextView.setText(issuedToCNameStringBuilder);
242 issuedToONameTextView.setText(issuedToONameStringBuilder);
243 issuedToUNameTextView.setText(issuedToUNameStringBuilder);
244 issuedByCNameTextView.setText(issuedByCNameStringBuilder);
245 issuedByONameTextView.setText(issuedByONameStringBuilder);
246 issuedByUNameTextView.setText(issuedByUNameStringBuilder);
247 startDateTextView.setText(startDateStringBuilder);
248 endDateTextView.setText(endDateStringBuilder);
250 // `onCreateDialog` requires the return of an `AlertDialog`.