feat/BackgroundServiceAndNetworkSensing (network sensing is implemented using...

feat/BackgroundServiceAndNetworkSensing (network sensing is implemented using android documentation)

app/src/main/java/com/example/pbd_jwr/encryptedSharedPref/EncryptedSharedPref.kt

 package com.example.pbd_jwr.encryptedSharedPref
 
-class EncryptedSharedPref {
+import android.content.Context
+import android.content.SharedPreferences
+import android.security.keystore.KeyGenParameterSpec
+import android.security.keystore.KeyProperties
+import androidx.security.crypto.EncryptedSharedPreferences
+import androidx.security.crypto.MasterKey
+
+object EncryptedSharedPref {
+
+    fun create(context: Context, sharedPrefName: String): SharedPreferences {
+        // Create or retrieve the master key for encryption
+        val keyGenParameterSpec = KeyGenParameterSpec.Builder(
+            sharedPrefName,
+            KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT
+        ).setBlockModes(KeyProperties.BLOCK_MODE_GCM)
+            .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
+            .setKeySize(256)
+            .build()
+
+        val masterKeyAlias = MasterKey.Builder(context, "login")
+            .setKeyGenParameterSpec(keyGenParameterSpec)
+            .build()
+
+        val sharedPreferences = EncryptedSharedPreferences.create(
+            context,
+            sharedPrefName,
+            masterKeyAlias,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+
+
+        // Create EncryptedSharedPreferences instance
+        return EncryptedSharedPreferences.create(
+            context,
+            sharedPrefName,  // Name of the shared preferences file
+            masterKeyAlias,
+            EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
+            EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
+        )
+    }
+
 }
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