Allow empty backup/restore password

app/src/main/kotlin/com/tutpro/baresip/CustomElements.kt

@@ -508,6 +508,7 @@ object CustomElements {
         ctx: Context,
         showPasswordDialog: MutableState<Boolean>,
         password: MutableState<String>,
+        emptyOk: Boolean = false,
         keyboardController: SoftwareKeyboardController?,
         title: String,
         message: String = "",
@@ -614,7 +615,7 @@ object CustomElements {
                                     keyboardController?.hide()
                                     showPasswordDialog.value = false
                                     password.value = password.value.trim()
-                                    if (!Account.checkAuthPass(password.value)) {
+                                    if (!(emptyOk && password.value.isEmpty()) && !Account.checkAuthPass(password.value)) {
                                         Toast.makeText(
                                             ctx,
                                             String.format(

app/src/main/kotlin/com/tutpro/baresip/MainScreen.kt

@@ -410,16 +410,15 @@ private fun MainScreen(
             ctx = ctx,
             showPasswordDialog = showPasswordDialog,
             password = password,
+            emptyOk = true,
             keyboardController = keyboardController,
             title = passwordTitle.value,
             okAction = {
-                if (password.value != "") {
                 if (passwordTitle.value == encryptPasswordTitle)
                     backup(ctx, password.value)
                 else
                     restore(ctx, password.value, onRestartClick)
                 password.value = ""
-                }
             },
             cancelAction = {
                 if (downloadsOutputUri != null) {

app/src/main/kotlin/com/tutpro/baresip/Utils.kt

@@ -100,10 +100,9 @@ object Utils {
     fun getNameValue(string: String, name: String): ArrayList<String> {
         val lines = string.split("\n")
         val result = ArrayList<String>()
-        for (line in lines) {
+        for (line in lines)
             if (line.startsWith(name))
                 result.add((line.substring(name.length).trim()).split(" \t")[0])
-        }
         return result
     }
 
@@ -178,8 +177,7 @@ object Utils {
                 ctx.getString(R.string.anonymous)
             else if (host == "unknown.invalid")
                 ctx.getString(R.string.unknown)
-            else
+            else if (params.isEmpty())
-                if (params.isEmpty())
                 "$user@$host"
             else
                 "$user@$host;" + params.joinToString(";")
@@ -750,7 +748,7 @@ object Utils {
     }
 
     fun encryptToUri(ctx: Context, uri: Uri, content: ByteArray, password: String): Boolean {
-        val obj = encrypt(content, password.toCharArray())
+        val obj = if (password == "") content else encrypt(content, password.toCharArray())
         try {
             val stream = ctx.contentResolver.openOutputStream(uri)
             if (stream != null)
@@ -781,7 +779,7 @@ object Utils {
         try {
             ObjectInputStream(stream).use {
                 val content = it.readObject() as ByteArray
-                plainData = decrypt(content, password.toCharArray())
+                plainData = if (password == "") content else decrypt(content, password.toCharArray())
             }
         } catch (e: Exception) {
             Log.w(TAG, "decryptFromUri as ByteArray failed: $e")