Kynetics/uf-android-client

/*
 * Copyright © 2017-2023  Kynetics  LLC
 * 
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 */

package com.kynetics.uf.android.content

import android.content.Context
import android.content.SharedPreferences
import androidx.security.crypto.EncryptedSharedPreferences
import androidx.security.crypto.MasterKeys

object EncryptedSharedPreferences {

    private const val SHARED_PREFERENCE_FILE_NAME = "UF_SECURE_SHARED_FILE"

    fun get(context: Context): SharedPreferences {
        return EncryptedSharedPreferences
                .create(
                        SHARED_PREFERENCE_FILE_NAME,
                        masterKeyAlias(),
                        context,
                        EncryptedSharedPreferences.PrefKeyEncryptionScheme.AES256_SIV,
                        EncryptedSharedPreferences.PrefValueEncryptionScheme.AES256_GCM
                )
    }


    private fun masterKeyAlias(): String {
        val keyGenParameterSpec = MasterKeys.AES256_GCM_SPEC
        return MasterKeys.getOrCreate(keyGenParameterSpec)
    }

}