Updates about_licenses, adding the full text of the Apache License 2.0 and the 3...
[PrivacyBrowser.git] / 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 }