2 * Copyright © 2018-2019,2021-2022 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
6 * Privacy Browser Android 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 Android 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 Android. If not, see <http://www.gnu.org/licenses/>.
19 package com.stoutner.privacybrowser.helpers
21 import android.app.Activity
23 import androidx.fragment.app.DialogFragment
24 import androidx.fragment.app.FragmentManager
26 import com.stoutner.privacybrowser.R
27 import com.stoutner.privacybrowser.activities.MainWebViewActivity
28 import com.stoutner.privacybrowser.dataclasses.PendingDialog
29 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog.Companion.displayDialog
30 import com.stoutner.privacybrowser.views.NestedScrollWebView
32 import java.lang.Exception
36 object CheckPinnedMismatchHelper {
38 fun checkPinnedMismatch(activity: Activity, fragmentManager: FragmentManager, nestedScrollWebView: NestedScrollWebView) {
39 // Initialize the current SSL certificate variables.
40 var currentWebsiteIssuedToCName = ""
41 var currentWebsiteIssuedToOName = ""
42 var currentWebsiteIssuedToUName = ""
43 var currentWebsiteIssuedByCName = ""
44 var currentWebsiteIssuedByOName = ""
45 var currentWebsiteIssuedByUName = ""
46 var currentWebsiteSslStartDate: Date? = null
47 var currentWebsiteSslEndDate: Date? = null
49 // Initialize the pinned SSL certificate variables.
50 var pinnedSslIssuedToCName = ""
51 var pinnedSslIssuedToOName = ""
52 var pinnedSslIssuedToUName = ""
53 var pinnedSslIssuedByCName = ""
54 var pinnedSslIssuedByOName = ""
55 var pinnedSslIssuedByUName = ""
56 var pinnedSslStartDate: Date? = null
57 var pinnedSslEndDate: Date? = null
59 // Get the current website SSL certificate.
60 val currentWebsiteSslCertificate = nestedScrollWebView.certificate
62 // Extract the individual pieces of information from the current website SSL certificate if it is not null.
63 if (currentWebsiteSslCertificate != null) {
64 currentWebsiteIssuedToCName = currentWebsiteSslCertificate.issuedTo.cName
65 currentWebsiteIssuedToOName = currentWebsiteSslCertificate.issuedTo.oName
66 currentWebsiteIssuedToUName = currentWebsiteSslCertificate.issuedTo.uName
67 currentWebsiteIssuedByCName = currentWebsiteSslCertificate.issuedBy.cName
68 currentWebsiteIssuedByOName = currentWebsiteSslCertificate.issuedBy.oName
69 currentWebsiteIssuedByUName = currentWebsiteSslCertificate.issuedBy.uName
70 currentWebsiteSslStartDate = currentWebsiteSslCertificate.validNotBeforeDate
71 currentWebsiteSslEndDate = currentWebsiteSslCertificate.validNotAfterDate
74 // Get the pinned SSL certificate information if it exists.
75 if (nestedScrollWebView.hasPinnedSslCertificate()) {
76 // Get the pinned SSL certificate.
77 val pinnedSslCertificatePair = nestedScrollWebView.getPinnedSslCertificate()
79 // Extract the arrays from the array list.
80 val pinnedSslCertificateStringArray = pinnedSslCertificatePair.first
81 val pinnedSslCertificateDateArray = pinnedSslCertificatePair.second
83 // Populate the pinned SSL certificate string variables.
84 pinnedSslIssuedToCName = pinnedSslCertificateStringArray[0]
85 pinnedSslIssuedToOName = pinnedSslCertificateStringArray[1]
86 pinnedSslIssuedToUName = pinnedSslCertificateStringArray[2]
87 pinnedSslIssuedByCName = pinnedSslCertificateStringArray[3]
88 pinnedSslIssuedByOName = pinnedSslCertificateStringArray[4]
89 pinnedSslIssuedByUName = pinnedSslCertificateStringArray[5]
91 // Populate the pinned SSL certificate date variables.
92 pinnedSslStartDate = pinnedSslCertificateDateArray[0]
93 pinnedSslEndDate = pinnedSslCertificateDateArray[1]
96 // Initialize string variables to store the SSL certificate dates. Strings are needed to compare the values below, which doesn't work with dates if the first one is null.
97 var currentWebsiteSslStartDateString = ""
98 var currentWebsiteSslEndDateString = ""
99 var pinnedSslStartDateString = ""
100 var pinnedSslEndDateString = ""
102 // Convert the dates to strings if they are not null.
103 if (currentWebsiteSslStartDate != null) {
104 currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString()
106 if (currentWebsiteSslEndDate != null) {
107 currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString()
109 if (pinnedSslStartDate != null) {
110 pinnedSslStartDateString = pinnedSslStartDate.toString()
112 if (pinnedSslEndDate != null) {
113 pinnedSslEndDateString = pinnedSslEndDate.toString()
116 // Check to see if the pinned information matches the current information.
117 if (((nestedScrollWebView.pinnedIpAddresses != "") && (nestedScrollWebView.currentIpAddresses != nestedScrollWebView.pinnedIpAddresses)) ||
118 (nestedScrollWebView.hasPinnedSslCertificate() && ((currentWebsiteIssuedToCName != pinnedSslIssuedToCName) ||
119 (currentWebsiteIssuedToOName != pinnedSslIssuedToOName) || (currentWebsiteIssuedToUName != pinnedSslIssuedToUName) ||
120 (currentWebsiteIssuedByCName != pinnedSslIssuedByCName) || (currentWebsiteIssuedByOName != pinnedSslIssuedByOName) ||
121 (currentWebsiteIssuedByUName != pinnedSslIssuedByUName) || (currentWebsiteSslStartDateString != pinnedSslStartDateString) ||
122 (currentWebsiteSslEndDateString != pinnedSslEndDateString)))) {
123 // Get a handle for the pinned mismatch alert dialog.
124 val pinnedMismatchDialogFragment: DialogFragment = displayDialog(nestedScrollWebView.webViewFragmentId)
126 // Try to show the dialog. Sometimes the window is not active.
128 // Show the pinned mismatch alert dialog.
129 pinnedMismatchDialogFragment.show(fragmentManager, activity.getString(R.string.pinned_mismatch))
130 } catch (exception: Exception) {
131 // Add the dialog to the pending dialog array list. It will be displayed in `onStart()`.
132 MainWebViewActivity.pendingDialogsArrayList.add(PendingDialog(pinnedMismatchDialogFragment, activity.getString(R.string.pinned_mismatch)))