Improve security of automation (#73)

Require length of automation key at least 20
Random automation key generation

app/src/main/java/com/bintianqi/owndroid/AutomationReceiver.kt

@@ -17,9 +17,6 @@ class AutomationReceiver: BroadcastReceiver() {
 fun handleTask(context: Context, intent: Intent): String {
     val sharedPrefs = context.getSharedPreferences("data", Context.MODE_PRIVATE)
     val key = sharedPrefs.getString("automation_key", "") ?: ""
-    if(key.length < 6) {
-        return "Key length must longer than 6"
-    }
     if(key != intent.getStringExtra("key")) {
         return "Wrong key"
     }

app/src/main/java/com/bintianqi/owndroid/Setting.kt

@@ -4,19 +4,32 @@ import android.content.Context
 import android.content.Intent
 import android.net.Uri
 import android.os.Build.VERSION
+import android.util.Base64
 import android.widget.Toast
 import androidx.compose.foundation.isSystemInDarkTheme
-import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Button
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme.typography
+import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Scaffold
 import androidx.compose.material3.Text
-import androidx.compose.material3.TextField
+import androidx.compose.runtime.Composable
-import androidx.compose.runtime.*
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavHostController
@@ -24,7 +37,11 @@ import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
 import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
-import com.bintianqi.owndroid.ui.*
+import com.bintianqi.owndroid.ui.Animations
+import com.bintianqi.owndroid.ui.SubPageItem
+import com.bintianqi.owndroid.ui.SwitchItem
+import com.bintianqi.owndroid.ui.TopBar
+import java.security.SecureRandom
 
 @Composable
 fun AppSetting(navCtrl:NavHostController, materialYou: MutableState<Boolean>, blackTheme: MutableState<Boolean>) {
@@ -144,16 +161,28 @@ private fun Automation() {
         Text(text = stringResource(R.string.automation_api), style = typography.headlineLarge)
         Spacer(Modifier.padding(vertical = 5.dp))
         var key by remember { mutableStateOf("") }
-        TextField(
+        OutlinedTextField(
             value = key, onValueChange = { key = it }, label = { Text("Key")},
-            modifier = Modifier.fillMaxWidth()
+            modifier = Modifier.fillMaxWidth(),
+            trailingIcon = {
+                IconButton(
+                    onClick = {
+                        val charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+                        val sr = SecureRandom()
+                        key = (1..20).map { charset[sr.nextInt(charset.length)] }.joinToString("")
+                    }
+                ) {
+                    Icon(painter = painterResource(R.drawable.casino_fill0), contentDescription = "Random")
+                }
+            }
         )
         Button(
             modifier = Modifier.fillMaxWidth(),
             onClick = {
                 sharedPref.edit().putString("automation_key", key).apply()
                 Toast.makeText(context, R.string.success, Toast.LENGTH_SHORT).show()
-            }
+            },
+            enabled = key.length >= 20
         ) {
             Text(stringResource(R.string.apply))
         }

app/src/main/res/drawable/casino_fill0.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="960"
+    android:viewportHeight="960">
+  <path
+      android:pathData="M300,720q25,0 42.5,-17.5T360,660q0,-25 -17.5,-42.5T300,600q-25,0 -42.5,17.5T240,660q0,25 17.5,42.5T300,720ZM300,360q25,0 42.5,-17.5T360,300q0,-25 -17.5,-42.5T300,240q-25,0 -42.5,17.5T240,300q0,25 17.5,42.5T300,360ZM480,540q25,0 42.5,-17.5T540,480q0,-25 -17.5,-42.5T480,420q-25,0 -42.5,17.5T420,480q0,25 17.5,42.5T480,540ZM660,720q25,0 42.5,-17.5T720,660q0,-25 -17.5,-42.5T660,600q-25,0 -42.5,17.5T600,660q0,25 17.5,42.5T660,720ZM660,360q25,0 42.5,-17.5T720,300q0,-25 -17.5,-42.5T660,240q-25,0 -42.5,17.5T600,300q0,25 17.5,42.5T660,360ZM200,840q-33,0 -56.5,-23.5T120,760v-560q0,-33 23.5,-56.5T200,120h560q33,0 56.5,23.5T840,200v560q0,33 -23.5,56.5T760,840L200,840ZM200,760h560v-560L200,200v560ZM200,200v560,-560Z"
+      android:fillColor="#000000"/>
+</vector>