app/src/main/java/com/stoutner/privacybrowser/helpers/CheckPinnedMismatchHelper.kt

   1 /*
   2  * Copyright © 2018-2019,2021-2022 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser Android <https://www.stoutner.com/privacy-browser-android>.
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.helpers
  21
  22 import android.app.Activity
  23
  24 import androidx.fragment.app.DialogFragment
  25 import androidx.fragment.app.FragmentManager
  26
  27 import com.stoutner.privacybrowser.R
  28 import com.stoutner.privacybrowser.activities.MainWebViewActivity
  29 import com.stoutner.privacybrowser.dataclasses.PendingDialog
  30 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog.Companion.displayDialog
  31 import com.stoutner.privacybrowser.views.NestedScrollWebView
  32
  33 import java.lang.Exception
  34
  35 import java.util.Date
  36
  37 object CheckPinnedMismatchHelper {
  38     @JvmStatic
  39     fun checkPinnedMismatch(activity: Activity, fragmentManager: FragmentManager, nestedScrollWebView: NestedScrollWebView) {
  40         // Initialize the current SSL certificate variables.
  41         var currentWebsiteIssuedToCName = ""
  42         var currentWebsiteIssuedToOName = ""
  43         var currentWebsiteIssuedToUName = ""
  44         var currentWebsiteIssuedByCName = ""
  45         var currentWebsiteIssuedByOName = ""
  46         var currentWebsiteIssuedByUName = ""
  47         var currentWebsiteSslStartDate: Date? = null
  48         var currentWebsiteSslEndDate: Date? = null
  49
  50         // Initialize the pinned SSL certificate variables.
  51         var pinnedSslIssuedToCName = ""
  52         var pinnedSslIssuedToOName = ""
  53         var pinnedSslIssuedToUName = ""
  54         var pinnedSslIssuedByCName = ""
  55         var pinnedSslIssuedByOName = ""
  56         var pinnedSslIssuedByUName = ""
  57         var pinnedSslStartDate: Date? = null
  58         var pinnedSslEndDate: Date? = null
  59
  60         // Get the current website SSL certificate.
  61         val currentWebsiteSslCertificate = nestedScrollWebView.certificate
  62
  63         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
  64         if (currentWebsiteSslCertificate != null) {
  65             currentWebsiteIssuedToCName = currentWebsiteSslCertificate.issuedTo.cName
  66             currentWebsiteIssuedToOName = currentWebsiteSslCertificate.issuedTo.oName
  67             currentWebsiteIssuedToUName = currentWebsiteSslCertificate.issuedTo.uName
  68             currentWebsiteIssuedByCName = currentWebsiteSslCertificate.issuedBy.cName
  69             currentWebsiteIssuedByOName = currentWebsiteSslCertificate.issuedBy.oName
  70             currentWebsiteIssuedByUName = currentWebsiteSslCertificate.issuedBy.uName
  71             currentWebsiteSslStartDate = currentWebsiteSslCertificate.validNotBeforeDate
  72             currentWebsiteSslEndDate = currentWebsiteSslCertificate.validNotAfterDate
  73         }
  74
  75         // Get the pinned SSL certificate information if it exists.
  76         if (nestedScrollWebView.hasPinnedSslCertificate()) {
  77             // Get the pinned SSL certificate.
  78             val pinnedSslCertificatePair = nestedScrollWebView.getPinnedSslCertificate()
  79
  80             // Extract the arrays from the array list.
  81             val pinnedSslCertificateStringArray = pinnedSslCertificatePair.first
  82             val pinnedSslCertificateDateArray = pinnedSslCertificatePair.second
  83
  84             // Populate the pinned SSL certificate string variables.
  85             pinnedSslIssuedToCName = pinnedSslCertificateStringArray[0]
  86             pinnedSslIssuedToOName = pinnedSslCertificateStringArray[1]
  87             pinnedSslIssuedToUName = pinnedSslCertificateStringArray[2]
  88             pinnedSslIssuedByCName = pinnedSslCertificateStringArray[3]
  89             pinnedSslIssuedByOName = pinnedSslCertificateStringArray[4]
  90             pinnedSslIssuedByUName = pinnedSslCertificateStringArray[5]
  91
  92             // Populate the pinned SSL certificate date variables.
  93             pinnedSslStartDate = pinnedSslCertificateDateArray[0]
  94             pinnedSslEndDate = pinnedSslCertificateDateArray[1]
  95         }
  96
  97         // 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.
  98         var currentWebsiteSslStartDateString = ""
  99         var currentWebsiteSslEndDateString = ""
 100         var pinnedSslStartDateString = ""
 101         var pinnedSslEndDateString = ""
 102
 103         // Convert the dates to strings if they are not null.
 104         if (currentWebsiteSslStartDate != null) {
 105             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString()
 106         }
 107         if (currentWebsiteSslEndDate != null) {
 108             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString()
 109         }
 110         if (pinnedSslStartDate != null) {
 111             pinnedSslStartDateString = pinnedSslStartDate.toString()
 112         }
 113         if (pinnedSslEndDate != null) {
 114             pinnedSslEndDateString = pinnedSslEndDate.toString()
 115         }
 116
 117         // Check to see if the pinned information matches the current information.
 118         if (((nestedScrollWebView.pinnedIpAddresses != "") && (nestedScrollWebView.currentIpAddresses != nestedScrollWebView.pinnedIpAddresses)) ||
 119             (nestedScrollWebView.hasPinnedSslCertificate() && ((currentWebsiteIssuedToCName != pinnedSslIssuedToCName) ||
 120                     (currentWebsiteIssuedToOName != pinnedSslIssuedToOName) || (currentWebsiteIssuedToUName != pinnedSslIssuedToUName) ||
 121                     (currentWebsiteIssuedByCName != pinnedSslIssuedByCName) || (currentWebsiteIssuedByOName != pinnedSslIssuedByOName) ||
 122                     (currentWebsiteIssuedByUName != pinnedSslIssuedByUName) || (currentWebsiteSslStartDateString != pinnedSslStartDateString) ||
 123                     (currentWebsiteSslEndDateString != pinnedSslEndDateString)))) {
 124             // Get a handle for the pinned mismatch alert dialog.
 125             val pinnedMismatchDialogFragment: DialogFragment = displayDialog(nestedScrollWebView.webViewFragmentId)
 126
 127             // Try to show the dialog.  Sometimes the window is not active.
 128             try {
 129                 // Show the pinned mismatch alert dialog.
 130                 pinnedMismatchDialogFragment.show(fragmentManager, activity.getString(R.string.pinned_mismatch))
 131             } catch (exception: Exception) {
 132                 // Add the dialog to the pending dialog array list.  It will be displayed in `onStart()`.
 133                 MainWebViewActivity.pendingDialogsArrayList.add(PendingDialog(pinnedMismatchDialogFragment, activity.getString(R.string.pinned_mismatch)))
 134             }
 135         }
 136     }
 137 }