🔐 Store credentials

app/src/main/java/com/mylloon/mobidl/Credentials.kt

@@ -1,11 +1,13 @@
 package com.mylloon.mobidl
 
+import android.content.Context.MODE_PRIVATE
 import android.os.Build
 import android.security.keystore.KeyProperties
 import javax.crypto.Cipher
 import android.security.keystore.KeyGenParameterSpec
 import androidx.annotation.RequiresApi
 import java.security.*
+import java.util.*
 
 
 class Credentials {
@@ -13,6 +15,7 @@ class Credentials {
     private val provider = "AndroidKeyStore" // location of the key
     private val aliasKeyStore = "MobiDL" // name of the key
     private val transformation = "RSA/ECB/PKCS1Padding" // 'type' of the key
+    private val sharedPref = "com.mylloon.MobiDL" // shared pref name
 
     @RequiresApi(Build.VERSION_CODES.M)
     fun generateKey() { // generate RSA Keys
@@ -56,4 +59,43 @@ class Credentials {
         val decryptedBytes = cipher.doFinal(message)
         return decryptedBytes.decodeToString()
     }
+
+    fun store(user: String, password: String) { // Store combo encrypted user/pass in shared preferences
+        val userEncrypted = encrypt(user) // encrypt user
+        val passwordEncrypted = encrypt(password) // encrypt password
+        val context = MainActivity.applicationContext() // get app context
+
+        // show key : Base64.getEncoder().encodeToString(encryptedData)
+
+        // write encrypted data to the app preference
+        val sharedPref = context.getSharedPreferences(sharedPref, MODE_PRIVATE)
+        with(sharedPref?.edit()) {
+            this?.putString("username", userEncrypted.contentToString())
+            this?.putString("password", passwordEncrypted.contentToString())
+            this?.apply()
+        }
+    }
+
+    fun get(type: Int): String? { // type 0 -> username | type 1 -> password [ return null if there is nothing
+        val context = MainActivity.applicationContext() // get app context
+
+        // read encrypted data from the app preference
+        val sharedPref = context.getSharedPreferences(sharedPref, MODE_PRIVATE)
+        var data: String? = null
+        when (type) {
+            0 -> { data = sharedPref.getString("username", null) }
+            1 -> { data = sharedPref.getString("password", null) }
+        }
+
+        return if (data != null) {
+            val split: List<String> =
+                data.substring(1, data.length - 1).split(", ")
+            val array = ByteArray(split.size)
+            for (i in split.indices) {
+                array[i] = split[i].toByte()
+            }
+            decrypt(array)
+        } else null
+
+    }
 }

app/src/main/java/com/mylloon/mobidl/MainActivity.kt

@@ -2,6 +2,7 @@ package com.mylloon.mobidl
 
 
 import android.Manifest
+import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
 import androidx.appcompat.app.AppCompatActivity
@@ -24,6 +25,18 @@ class MainActivity : AppCompatActivity() {
     private var inSettings: Boolean = false // by default your not in settings page
     var prefs: SharedPreferences? = null // first run detection
 
+    init {
+        instance = this
+    }
+
+    companion object {
+        private var instance: MainActivity? = null
+
+        fun applicationContext() : Context {
+            return instance!!.applicationContext
+        }
+    }
+
     private fun toggleSettingsButtonVisibility() { // Change Settings button visibility
         val visibility: Boolean = settingsButton?.findItem(R.id.settingsButton)?.isVisible == true
         settingsButton?.findItem(R.id.settingsButton)?.isVisible = !visibility
@@ -32,39 +45,61 @@ class MainActivity : AppCompatActivity() {
     @RequiresApi(Build.VERSION_CODES.O)
     override fun onCreate(savedInstanceState: Bundle?) { // Main function
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_login) // show login page
-
         prefs = getSharedPreferences("com.mylloon.MobiDL", MODE_PRIVATE)
 
-        val userInput = findViewById<EditText>(R.id.usernameInput)
+        fun loginPage() {
-        val passwordInput = findViewById<EditText>(R.id.passwordInput)
+            setContentView(R.layout.activity_login) // show login page
-        val buttonInput = findViewById<Button>(R.id.loginButton)
 
-        fun changeButtonStatus() { // function who enable/disable the login button
+            val userInput = findViewById<EditText>(R.id.usernameInput)
-            val text1: String = userInput.text.toString()
+            val passwordInput = findViewById<EditText>(R.id.passwordInput)
-            val text2: String = passwordInput.text.toString()
+            val buttonInput = findViewById<Button>(R.id.loginButton)
-            buttonInput.isEnabled = text1.isNotEmpty() && text2.isNotEmpty()
+
+            fun changeButtonStatus() { // function who enable/disable the login button
+                val text1: String = userInput.text.toString()
+                val text2: String = passwordInput.text.toString()
+                buttonInput.isEnabled = text1.isNotEmpty() && text2.isNotEmpty()
+            }
+
+            userInput.addTextChangedListener(object : TextWatcher { // looking user input changes
+                override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+                override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+                override fun afterTextChanged(editable: Editable) {
+                    changeButtonStatus()
+                }
+            })
+
+            passwordInput.addTextChangedListener(object :
+                TextWatcher { // looking password input changes
+                override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+                override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+                override fun afterTextChanged(editable: Editable) {
+                    changeButtonStatus()
+                }
+            })
+
+            buttonInput.setOnClickListener { // show main page when clicking the login button
+                val user = userInput.text.toString()
+                val password = passwordInput.text.toString()
+
+                Credentials().store(user, password)
+                mainPage()
+            }
         }
-
+        if (Credentials().get(0) == null) { // test if credentials have already been registered
-        userInput.addTextChangedListener(object : TextWatcher { // looking user input changes
+            loginPage() // if no ask for
-            override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+        } else {
-            override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
+            mainPage() // if yes go to main page
-            override fun afterTextChanged(editable: Editable) { changeButtonStatus() }
-        })
-
-        passwordInput.addTextChangedListener(object : TextWatcher { // looking password input changes
-            override fun beforeTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
-            override fun onTextChanged(p0: CharSequence?, p1: Int, p2: Int, p3: Int) {}
-            override fun afterTextChanged(editable: Editable) { changeButtonStatus() }
-        })
-
-        buttonInput.setOnClickListener { // show main page when clicking the login button
-            setContentView(R.layout.activity_main)
-            toggleSettingsButtonVisibility()
-            callScript() // call script
         }
     }
 
+    private fun mainPage() {
+        setContentView(R.layout.activity_main)
+        toggleSettingsButtonVisibility()
+        // user = Credentials().get(0).toString()
+        // password = Credentials().get(1).toString()
+        // callScript(user, password) // call script
+    }
+
     @RequiresApi(Build.VERSION_CODES.M)
     override fun onResume() {
         super.onResume()
@@ -72,7 +107,7 @@ class MainActivity : AppCompatActivity() {
             println("Generate RSA keys...")
             Credentials().generateKey()
             println("Done!")
-            prefs!!.edit().putBoolean("firstrun", false).commit() // first run done, now the next ones won't be "first".
+            prefs!!.edit().putBoolean("firstrun", false).apply() // first run done, now the next ones won't be "first".
         }
     }
 
@@ -95,20 +130,19 @@ class MainActivity : AppCompatActivity() {
 
     override fun onBackPressed() { // allow user to use back button to go back to main page
         if (inSettings) {
-            setContentView(R.layout.activity_main)
+            mainPage()
-            toggleSettingsButtonVisibility()
             inSettings = false
         } else super.onBackPressed()
     }
 
-    private fun callScript() {
+    private fun callScript(user: String, password: String) {
         if(ContextCompat.checkSelfPermission(this@MainActivity, Manifest.permission.INTERNET)
             != PackageManager.PERMISSION_GRANTED) {
             Toast.makeText(this@MainActivity, "No permission to use internet", Toast.LENGTH_SHORT).show()
             this.finishAffinity()
         } else {
             println("test du script")
-            Scraper("Mylloon", "Hd59NGB4Me8WSM", app = "Plex", debug = true).search()
+            Scraper(user, password, app = "Plex", debug = true).search()
         }
     }
 }