app/src/main/java/com/stoutner/privacybrowser/coroutines/GetHostIpAddressesCoroutine.kt

   1 /*
   2  * Copyright 2019,2021-2023 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.coroutines
  21
  22 import android.text.SpannableStringBuilder
  23 import android.text.Spanned
  24 import android.text.style.ForegroundColorSpan
  25 import android.widget.TextView
  26
  27 import androidx.fragment.app.FragmentManager
  28
  29 import com.stoutner.privacybrowser.helpers.CheckPinnedMismatchHelper
  30 import com.stoutner.privacybrowser.views.NestedScrollWebView
  31
  32 import kotlinx.coroutines.CoroutineScope
  33 import kotlinx.coroutines.Dispatchers
  34 import kotlinx.coroutines.launch
  35 import kotlinx.coroutines.withContext
  36
  37 import java.lang.StringBuilder
  38 import java.net.InetAddress
  39 import java.net.UnknownHostException
  40
  41 object GetHostIpAddressesCoroutine {
  42     fun getAddresses(domainName: String, ipAddressesLabel: String, blueColorSpan: ForegroundColorSpan, ipAddressesTextView: TextView) {
  43         // Get the IP addresses using a coroutine.
  44         CoroutineScope(Dispatchers.Main).launch {
  45             // Get the IP addresses on the IO thread.
  46             withContext(Dispatchers.IO) {
  47                 // Get an array with the IP addresses for the host.
  48                 try {
  49                     // Initialize an IP address string builder.
  50                     val ipAddressesStringBuilder = StringBuilder()
  51
  52                     // Get an array with all the IP addresses for the domain.
  53                     val inetAddressesArray = InetAddress.getAllByName(domainName)
  54
  55                     // Add each IP address to the string builder.
  56                     for (inetAddress in inetAddressesArray) {
  57                         // Add a line break to the string builder if this is not the first IP address.
  58                         if (ipAddressesStringBuilder.isNotEmpty()) {
  59                             ipAddressesStringBuilder.append("\n")
  60                         }
  61
  62                         // Add the IP address to the string builder.
  63                         ipAddressesStringBuilder.append(inetAddress.hostAddress)
  64                     }
  65
  66                     // Create a spannable string builder.
  67                     val addressesStringBuilder = SpannableStringBuilder(ipAddressesLabel + ipAddressesStringBuilder)
  68
  69                     // Set the string builder to display the certificate information in blue.  `SPAN_INCLUSIVE_INCLUSIVE` allows the span to grow in either direction.
  70                     addressesStringBuilder.setSpan(blueColorSpan, ipAddressesLabel.length, addressesStringBuilder.length, Spanned.SPAN_INCLUSIVE_INCLUSIVE)
  71
  72                     // Populate the IP addresses text view on the UI thread.
  73                     withContext(Dispatchers.Main) {
  74                         // Populate the IP addresses text view.
  75                         ipAddressesTextView.text = addressesStringBuilder
  76                     }
  77                 } catch (exception: UnknownHostException) {
  78                     // Do nothing.
  79                 }
  80             }
  81         }
  82     }
  83
  84     fun checkPinnedMismatch(domainName: String, nestedScrollWebView: NestedScrollWebView, supportFragmentManager: FragmentManager, pinnedMismatchString: String) {
  85         // Get the IP addresses using a coroutine.
  86         CoroutineScope(Dispatchers.Main).launch {
  87             // Get the IP addresses on the IO thread.
  88             withContext(Dispatchers.IO) {
  89                 // Get an array with the IP addresses for the host.
  90                 try {
  91                     // Initialize an IP address string builder.
  92                     val ipAddressesStringBuilder = StringBuilder()
  93
  94                     // Get an array with all the IP addresses for the domain.
  95                     val inetAddressesArray = InetAddress.getAllByName(domainName)
  96
  97                     // Add each IP address to the string builder.
  98                     for (inetAddress in inetAddressesArray) {
  99                         // Add a line break to the string builder if this is not the first IP address.
 100                         if (ipAddressesStringBuilder.isNotEmpty()) {
 101                             ipAddressesStringBuilder.append("\n")
 102                         }
 103
 104                         // Add the IP address to the string builder.
 105                         ipAddressesStringBuilder.append(inetAddress.hostAddress)
 106                     }
 107
 108                     // Store the IP addresses.
 109                     nestedScrollWebView.currentIpAddresses = ipAddressesStringBuilder.toString()
 110
 111                     // Checked for pinned mismatches if there is pinned information and it is not ignored.  This must be done on the UI thread because checking the pinned mismatch interacts with the WebView.
 112                     withContext(Dispatchers.Main) {
 113                         if ((nestedScrollWebView.hasPinnedSslCertificate() || nestedScrollWebView.pinnedIpAddresses.isNotEmpty()) && !nestedScrollWebView.ignorePinnedDomainInformation) {
 114                             CheckPinnedMismatchHelper.checkPinnedMismatch(nestedScrollWebView, supportFragmentManager, pinnedMismatchString)
 115                         }
 116                     }
 117                 } catch (exception: UnknownHostException) {
 118                     // Do nothing.
 119                 }
 120             }
 121         }
 122     }
 123 }