Request: add a TLS version preference

app/schemas/dev.lowrespalmtree.comet.AppDatabase/1.json

@@ -2,7 +2,7 @@
   "formatVersion": 1,
   "database": {
     "version": 1,
-    "identityHash": "70da3095877de4a82021855471523b90",
+    "identityHash": "ffa6a7f7cce2d67541e0fbe28441e780",
     "entities": [
       {
         "tableName": "HistoryEntry",
@@ -38,7 +38,7 @@
       },
       {
         "tableName": "Identity",
-        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `key` TEXT NOT NULL, `name` TEXT)",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `key` TEXT NOT NULL, `name` TEXT, `urls` TEXT NOT NULL)",
         "fields": [
           {
             "fieldPath": "id",
@@ -57,38 +57,12 @@
             "columnName": "name",
             "affinity": "TEXT",
             "notNull": false
-          }
-        ],
-        "primaryKey": {
-          "columnNames": [
-            "id"
-          ],
-          "autoGenerate": true
-        },
-        "indices": [],
-        "foreignKeys": []
-      },
-      {
-        "tableName": "IdentityUsage",
-        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `uri` TEXT NOT NULL, `identityId` INTEGER NOT NULL)",
-        "fields": [
-          {
-            "fieldPath": "id",
-            "columnName": "id",
-            "affinity": "INTEGER",
-            "notNull": true
           },
           {
-            "fieldPath": "uri",
-            "columnName": "uri",
+            "fieldPath": "urls",
+            "columnName": "urls",
             "affinity": "TEXT",
             "notNull": true
-          },
-          {
-            "fieldPath": "identityId",
-            "columnName": "identityId",
-            "affinity": "INTEGER",
-            "notNull": true
           }
         ],
         "primaryKey": {
@@ -104,7 +78,7 @@
     "views": [],
     "setupQueries": [
       "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
-      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '70da3095877de4a82021855471523b90')"
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, 'ffa6a7f7cce2d67541e0fbe28441e780')"
     ]
   }
 }

app/src/main/java/dev/lowrespalmtree/comet/Database.kt

@@ -1,18 +1,18 @@
 package dev.lowrespalmtree.comet
 
 import android.content.Context
+import android.util.Base64
+import androidx.room.*
 import androidx.room.Database
-import androidx.room.Room
-import androidx.room.RoomDatabase
 
 @Database(
     entities = [
         History.HistoryEntry::class,
         Identities.Identity::class,
-        Identities.IdentityUsage::class,
     ],
     version = 1
 )
+@TypeConverters(Converters::class)
 abstract class AppDatabase : RoomDatabase() {
     abstract fun historyEntryDao(): History.HistoryEntryDao
     abstract fun identityDao(): Identities.IdentityDao
@@ -27,3 +27,17 @@ object Database {
         INSTANCE = Room.databaseBuilder(context, AppDatabase::class.java, "comet.db").build()
     }
 }
+
+typealias UrlList = ArrayList<String>
+
+class Converters {
+    @TypeConverter
+    fun fromUrlList(value: UrlList?): String? =
+        value?.joinToString("-") {
+            Base64.encodeToString(it.encodeToByteArray(), Base64.DEFAULT)
+        }
+
+    @TypeConverter
+    fun stringToUrlList(value: String?): UrlList? =
+        value?.split("-")?.map { Base64.decode(it, Base64.DEFAULT).decodeToString() } as UrlList?
+}

app/src/main/java/dev/lowrespalmtree/comet/Identities.kt

@@ -4,8 +4,10 @@ import android.security.keystore.KeyGenParameterSpec
 import android.security.keystore.KeyProperties
 import android.util.Log
 import androidx.room.*
+import java.lang.IllegalArgumentException
 import java.security.KeyPairGenerator
 import java.security.KeyStore
+import javax.security.auth.x500.X500Principal
 
 object Identities {
     @Entity
@@ -16,16 +18,8 @@ object Identities {
         val key: String,
         /** Label for this identity. */
         var name: String?,
-    )
-
-    @Entity
-    data class IdentityUsage(
-        /** ID. */
-        @PrimaryKey(autoGenerate = true) val id: Int,
-        /** URL path where an identity can be used. */
-        val uri: String,
-        /** ID of the Identity to use. */
-        val identityId: Int
+        /** URL paths configured to use this identity. */
+        var urls: UrlList
     )
 
     @Dao
@@ -42,15 +36,12 @@ object Identities {
         @Update
         suspend fun update(vararg identities: Identity)
 
-        @Query("SELECT * FROM IdentityUsage WHERE :identityId = identityId")
-        suspend fun getUsagesFor(identityId: Int): List<IdentityUsage>
-
         @Delete
         suspend fun delete(vararg identities: Identity)
     }
 
     suspend fun insert(key: String, name: String? = null): Long =
-        Database.INSTANCE.identityDao().insert(Identity(0, key, name))
+        Database.INSTANCE.identityDao().insert(Identity(0, key, name, arrayListOf()))
 
     suspend fun get(id: Long): Identity? =
         Database.INSTANCE.identityDao().get(id)
@@ -69,11 +60,20 @@ object Identities {
         Database.INSTANCE.identityDao().delete(*identities)
     }
 
-    fun generateClientCert(alias: String) {
+    fun generateClientCert(alias: String, commonName: String) {
         val algo = KeyProperties.KEY_ALGORITHM_RSA
         val kpg = KeyPairGenerator.getInstance(algo, "AndroidKeyStore")
         val purposes = KeyProperties.PURPOSE_SIGN or KeyProperties.PURPOSE_VERIFY
         val spec = KeyGenParameterSpec.Builder(alias, purposes)
+            .apply {
+                if (commonName.isNotEmpty()) {
+                    try {
+                        setCertificateSubject(X500Principal("CN=$commonName"))
+                    } catch (e: IllegalArgumentException) {
+                        Log.e(TAG, "generateClientCert: bad common name: ${e.message}")
+                    }
+                }
+            }
             .setDigests(KeyProperties.DIGEST_SHA256)
             .build()
         kpg.initialize(spec)
@@ -83,7 +83,6 @@ object Identities {
 
     private fun deleteClientCert(alias: String) {
         val keyStore = KeyStore.getInstance("AndroidKeyStore").also { it.load(null) }
-        Log.i(TAG, keyStore.aliases().toList().joinToString { it })
         if (keyStore.containsAlias(alias)) {
             keyStore.deleteEntry(alias)
             Log.i(TAG, "deleteClientCert: deleted entry with alias \"$alias\"")

app/src/main/java/dev/lowrespalmtree/comet/IdentitiesAdapter.kt

@@ -35,7 +35,7 @@ class IdentitiesAdapter(private val listener: Listener) :
             listener.onIdentityClick(item)
         }
         holder.binding.container.setOnLongClickListener {
-            listener.onIdentityLongClick(item, holder.itemView);
+            listener.onIdentityLongClick(item, holder.itemView)
             true
         }
     }

app/src/main/java/dev/lowrespalmtree/comet/IdentitiesFragment.kt

@@ -20,7 +20,7 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import java.util.*
 
-class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialog.Listener {
+class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityEditDialog.Listener {
     private val vm: IdentitiesViewModel by viewModels()
     private lateinit var binding: FragmentIdentitiesBinding
     private lateinit var adapter: IdentitiesAdapter
@@ -41,7 +41,7 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
         adapter = IdentitiesAdapter(this)
         binding.list.adapter = adapter
 
-        binding.floatingActionButton.setOnClickListener { openNewIdentityEditor() }
+        binding.floatingActionButton.setOnClickListener { openIdentityWizard() }
 
         vm.identities.observe(viewLifecycleOwner) { adapter.setIdentities(it) }
 
@@ -49,7 +49,7 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
     }
 
     override fun onIdentityClick(identity: Identity) {
-        IdentityDialog(requireContext(), identity, this).show()
+        IdentityEditDialog(requireContext(), identity, this).show()
     }
 
     override fun onIdentityLongClick(identity: Identity, view: View) {
@@ -59,7 +59,7 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
                 setOnMenuItemClickListener { item ->
                     when (item.itemId) {
                         R.id.item_edit -> {
-                            IdentityDialog(
+                            IdentityEditDialog(
                                 requireContext(),
                                 identity,
                                 this@IdentitiesFragment
@@ -82,27 +82,39 @@ class IdentitiesFragment : Fragment(), IdentitiesAdapter.Listener, IdentityDialo
         vm.saveIdentity(identity)
     }
 
-    private fun openNewIdentityEditor() {
-        toast(requireContext(), R.string.generating_keypair)
-        vm.newIdentity.observe(viewLifecycleOwner) { identity ->
-            if (identity == null)
-                return@observe
-            vm.newIdentity.removeObservers(viewLifecycleOwner)
-            vm.newIdentity.value = null
-            IdentityDialog(requireContext(), identity, this).show()
-        }
-        vm.createNewIdentity()
+    /**
+     * Open the new identity wizard.
+     *
+     * There is a first dialog to ask the user about the desired subject common name,
+     * then the certificate is generated and the edition dialog is opened.
+     */
+    private fun openIdentityWizard() {
+        InputDialog(requireContext(), getString(R.string.input_common_name))
+            .show(
+                onOk = { text ->
+                    toast(requireContext(), R.string.generating_keypair)
+                    vm.newIdentity.observe(viewLifecycleOwner) { identity ->
+                        if (identity == null)
+                            return@observe
+                        vm.newIdentity.removeObservers(viewLifecycleOwner)
+                        vm.newIdentity.value = null
+                        IdentityEditDialog(requireContext(), identity, this).show()
+                    }
+                    vm.createNewIdentity(text)
+                },
+                onDismiss = {}
+            )
     }
 
     class IdentitiesViewModel : ViewModel() {
         val identities: MutableLiveData<List<Identity>> by lazy { MutableLiveData<List<Identity>>() }
         val newIdentity: MutableLiveData<Identity> by lazy { MutableLiveData<Identity>() }
 
-        fun createNewIdentity() {
+        fun createNewIdentity(commonName: String) {
             viewModelScope.launch(Dispatchers.IO) {
                 val alias = "identity-${UUID.randomUUID()}"
-                Identities.generateClientCert(alias)
-                val newIdentityId = Identities.insert(alias)
+                Identities.generateClientCert(alias, commonName)
+                val newIdentityId = Identities.insert(alias, commonName)
                 newIdentity.postValue(Identities.get(newIdentityId))
             }
                 .invokeOnCompletion { refreshIdentities() }

app/src/main/java/dev/lowrespalmtree/comet/IdentityEditDialog.kt

@@ -5,7 +5,7 @@ import android.content.Context
 import android.view.LayoutInflater
 import dev.lowrespalmtree.comet.databinding.DialogIdentityBinding
 
-class IdentityDialog(
+class IdentityEditDialog(
     private val context: Context,
     private val identity: Identities.Identity,
     private val listener: Listener
@@ -19,12 +19,14 @@ class IdentityDialog(
     fun show() {
         binding = DialogIdentityBinding.inflate(LayoutInflater.from(context))
         binding.labelInput.setText(identity.name.orEmpty())
+        binding.urlInput.setText(identity.urls.getOrNull(0).orEmpty())
         binding.aliasText.text = identity.key
         AlertDialog.Builder(context)
             .setTitle(R.string.edit_identity)
             .setView(binding.root)
             .setPositiveButton(android.R.string.ok) { _, _ ->
                 identity.name = binding.labelInput.text.toString()
+                identity.urls = arrayListOf(binding.urlInput.text.toString())
                 listener.onSaveIdentity(identity)
             }
             .create()

app/src/main/java/dev/lowrespalmtree/comet/InputDialog.kt

@@ -0,0 +1,23 @@
+package dev.lowrespalmtree.comet
+
+import android.app.AlertDialog
+import android.content.Context
+import android.view.LayoutInflater
+import dev.lowrespalmtree.comet.databinding.DialogInputBinding
+
+/** Generic text input dialog. Used for code 10 and a few other simple text input. */
+class InputDialog(
+    private val context: Context,
+    private val prompt: String
+) {
+    fun show(onOk: (text: String) -> Unit, onDismiss: () -> Unit) {
+        val binding = DialogInputBinding.inflate(LayoutInflater.from(context))
+        AlertDialog.Builder(context)
+            .setMessage(prompt)
+            .setView(binding.root)
+            .setPositiveButton(android.R.string.ok) { _, _ -> onOk(binding.textInput.text.toString()) }
+            .setOnDismissListener { onDismiss() }
+            .create()
+            .show()
+    }
+}

app/src/main/java/dev/lowrespalmtree/comet/PageFragment.kt

@@ -5,19 +5,15 @@ import android.content.ActivityNotFoundException
 import android.content.Intent
 import android.net.Uri
 import android.os.Bundle
-import android.text.InputType
 import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.view.inputmethod.EditorInfo
 import android.view.inputmethod.InputMethodManager
-import android.widget.EditText
-import android.widget.FrameLayout
 import android.widget.TextView
 import androidx.activity.addCallback
 import androidx.appcompat.app.AlertDialog
-import androidx.core.view.setMargins
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import androidx.preference.PreferenceManager
@@ -122,11 +118,13 @@ class PageFragment : Fragment(), PageAdapter.Listener {
         when (uri.scheme) {
             "gemini" -> {
                 val prefs = PreferenceManager.getDefaultSharedPreferences(requireContext())
+                val protocol =
+                    prefs.getString("tls_version", Request.DEFAULT_TLS_VERSION)!!
                 val connectionTimeout =
                     prefs.getInt("connection_timeout", Request.DEFAULT_CONNECTION_TIMEOUT_SEC)
                 val readTimeout =
                     prefs.getInt("read_timeout", Request.DEFAULT_READ_TIMEOUT_SEC)
-                vm.sendGeminiRequest(uri, connectionTimeout, readTimeout)
+                vm.sendGeminiRequest(uri, protocol, connectionTimeout, readTimeout)
             }
             else -> openUnknownScheme(uri)
         }
@@ -196,29 +194,14 @@ class PageFragment : Fragment(), PageAdapter.Listener {
     }
 
     private fun askForInput(prompt: String, uri: Uri) {
-        val editText = EditText(requireContext())
-        editText.inputType = InputType.TYPE_CLASS_TEXT
-        val inputView = FrameLayout(requireContext()).apply {
-            addView(FrameLayout(requireContext()).apply {
-                addView(editText)
-                val params = FrameLayout.LayoutParams(
-                    FrameLayout.LayoutParams.MATCH_PARENT,
-                    FrameLayout.LayoutParams.WRAP_CONTENT
-                )
-                params.setMargins(resources.getDimensionPixelSize(R.dimen.text_margin))
-                layoutParams = params
-            })
-        }
-        AlertDialog.Builder(requireContext())
-            .setMessage(prompt.ifEmpty { "Input required" })
-            .setView(inputView)
-            .setPositiveButton(android.R.string.ok) { _, _ ->
-                val newUri = uri.buildUpon().query(editText.text.toString()).build()
-                openUrl(newUri.toString(), base = vm.currentUrl)
-            }
-            .setOnDismissListener { updateState(PageViewModel.State.IDLE) }
-            .create()
-            .show()
+        InputDialog(requireContext(), prompt.ifEmpty { "Input required" })
+            .show(
+                onOk = { text ->
+                    val newUri = uri.buildUpon().query(text).build()
+                    openUrl(newUri.toString(), base = vm.currentUrl)
+                },
+                onDismiss = { updateState(PageViewModel.State.IDLE) }
+            )
     }
 
     private fun openUnknownScheme(uri: Uri) {

app/src/main/java/dev/lowrespalmtree/comet/PageViewModel.kt

@@ -52,7 +52,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
      * The URI must be valid, absolute and with a gemini scheme.
      */
     @ExperimentalCoroutinesApi
-    fun sendGeminiRequest(uri: Uri, connectionTimeout: Int, readTimeout: Int, redirects: Int = 0) {
+    fun sendGeminiRequest(uri: Uri, protocol: String, connectionTimeout: Int, readTimeout: Int, redirects: Int = 0) {
         Log.d(TAG, "sendRequest: URI \"$uri\"")
         loadingUrl = uri
         state.postValue(State.CONNECTING)
@@ -60,7 +60,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
         requestJob = viewModelScope.launch(Dispatchers.IO) {
             val response = try {
                 val request = Request(uri)
-                val socket = request.connect(connectionTimeout, readTimeout)
+                val socket = request.connect(protocol, connectionTimeout, readTimeout)
                 val channel = request.proceed(socket, this)
                 Response.from(channel, viewModelScope)
             } catch (e: Exception) {
@@ -71,7 +71,7 @@ class PageViewModel(@Suppress("unused") private val savedStateHandle: SavedState
                 signalError(
                     when (e) {
                         is UnknownHostException -> "Unknown host \"${uri.authority}\"."
-                        is ConnectException -> "Can't connect to this server: ${e.localizedMessage}."
+                        is ConnectException -> "Can't connect to this server: ${e.message}."
                         is SocketTimeoutException -> "Connection timed out."
                         is CancellationException -> "Connection cancelled: ${e.message}."
                         else -> "Oops, something failed!"

app/src/main/java/dev/lowrespalmtree/comet/Request.kt

@@ -17,9 +17,9 @@ import javax.net.ssl.X509TrustManager
 class Request(private val uri: Uri) {
     private val port get() = if (uri.port > 0) uri.port else 1965
 
-    fun connect(connectionTimeout: Int, readTimeout: Int): SSLSocket {
-        Log.d(TAG, "connect")
-        val context = SSLContext.getInstance("TLSv1.2")
+    fun connect(protocol: String, connectionTimeout: Int, readTimeout: Int): SSLSocket {
+        Log.d(TAG, "connect: $protocol, c.to. $connectionTimeout, r.to. $readTimeout")
+        val context = SSLContext.getInstance(protocol)
         context.init(null, arrayOf(TrustManager()), null)
         val socket = context.socketFactory.createSocket() as SSLSocket
         socket.soTimeout = readTimeout * 1000
@@ -70,6 +70,7 @@ class Request(private val uri: Uri) {
 
     companion object {
         private const val TAG = "Request"
+        const val DEFAULT_TLS_VERSION = "TLSv1.3"
         const val DEFAULT_CONNECTION_TIMEOUT_SEC = 10
         const val DEFAULT_READ_TIMEOUT_SEC = 10
     }

app/src/main/java/dev/lowrespalmtree/comet/utils/Ui.kt

@@ -28,6 +28,7 @@ fun confirm(context: Context, @StringRes prompt: Int, onOk: () -> Unit) {
         .setTitle(R.string.confirm)
         .setView(binding.root)
         .setPositiveButton(android.R.string.ok) { _, _ -> onOk() }
+        .setNegativeButton(android.R.string.cancel) { dialog, _ -> dialog.dismiss() }
         .create()
         .show()
 }

app/src/main/res/layout/dialog_confirm.xml

@@ -8,6 +8,6 @@
         android:id="@+id/text_view"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:layout_margin="16sp" />
+        style="@style/CometText" />
 
 </LinearLayout>

app/src/main/res/layout/dialog_identity.xml

@@ -3,12 +3,14 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:padding="16dp"
+
     android:orientation="vertical">
 
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/identity_name" />
+        android:text="@string/identity_name"
+        style="@style/CometLabel" />
 
     <EditText
         android:id="@+id/labelInput"
@@ -18,10 +20,33 @@
         android:importantForAutofill="no"
         android:inputType="text" />
 
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="8dp" />
+
     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:text="@string/identity_alias_title" />
+        android:text="@string/identity_usages"
+        style="@style/CometLabel" />
+
+    <EditText
+        android:id="@+id/urlInput"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:hint="@string/url"
+        android:inputType="textUri"
+        android:importantForAutofill="no" />
+
+    <Space
+        android:layout_width="wrap_content"
+        android:layout_height="8dp" />
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="@string/identity_alias_title"
+        style="@style/CometLabel" />
 
     <TextView
         android:id="@+id/aliasText"

app/src/main/res/layout/dialog_input.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <EditText
+        android:id="@+id/text_input"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_margin="16dp"
+        android:inputType="text" />
+
+</LinearLayout>

app/src/main/res/values/arrays.xml

@@ -1,12 +1,11 @@
 <resources>
-    <!-- Reply Preference -->
-    <string-array name="reply_entries">
-        <item>Reply</item>
-        <item>Reply to all</item>
+    <string-array name="tls_version_entries">
+        <item>TLS v1.3</item>
+        <item>TLS v1.2</item>
     </string-array>
 
-    <string-array name="reply_values">
-        <item>reply</item>
-        <item>reply_all</item>
+    <string-array name="tls_version_values">
+        <item>TLSv1.3</item>
+        <item>TLSv1.2</item>
     </string-array>
 </resources>

app/src/main/res/values/strings.xml

@@ -44,5 +44,8 @@
     <string name="confirm">Confirm</string>
     <string name="confirm_identity_delete">Are you sure you want to delete this identity? The client certificate cannot be retrieved afterwards.</string>
     <string name="edit">Edit</string>
+    <string name="identity_usages">Active URL path</string>
+    <string name="input_common_name">Enter a name to use as the certificate\'s subject common name. This can be left empty.</string>
+    <string name="tls_version">TLS version</string>
 
 </resources>

app/src/main/res/values/styles.xml

@@ -14,4 +14,9 @@
         <item name="android:textIsSelectable">false</item>
         <item name="android:background">?attr/selectableItemBackground</item>
     </style>
+    <style name="CometLabel">
+        <item name="android:textSize">16sp</item>
+        <item name="android:textColor">@color/main_accent</item>
+        <item name="android:paddingTop">2dp</item>
+    </style>
 </resources>

app/src/main/res/xml/root_preferences.xml

@@ -13,18 +13,18 @@
             app:key="home_set"
             app:title="@string/pref_home_set" />
 
-        <ListPreference
-            app:defaultValue="reply"
-            app:entries="@array/reply_entries"
-            app:entryValues="@array/reply_values"
-            app:key="reply"
-            app:title="@string/reply_title"
-            app:useSimpleSummaryProvider="true" />
-
     </PreferenceCategory>
 
     <PreferenceCategory app:title="@string/pref_protocol_header">
 
+        <DropDownPreference
+            app:key="tls_version"
+            app:entries="@array/tls_version_entries"
+            app:entryValues="@array/tls_version_values"
+            app:defaultValue="TLSv1.3"
+            app:useSimpleSummaryProvider="true"
+            app:title="@string/tls_version" />
+
         <SeekBarPreference
             android:defaultValue="10"
             android:max="60"