shafty023

/**
 * Save the storable instance to preferences.
 *
 * @param storable a storable instance
 */
fun saveToPrefs(context: Context, storable: Storable) {
    val serialized = Gson().toJson(storable)
    val prefs = context.getSharedPreferences("database",
        Context.MODE_PRIVATE)
    prefs.edit().putString("key", serialized).apply()

shafty023

/**
 * Container for everything needed for decrypting the database.
 *
 * @param iv initialization vector
 * @param key encrypted database key
 * @param salt cryptographic salt
 */
data class Storable(val iv: String, val key: String, val salt: String)

shafty023

private lateinit var rawByteKey: ByteArray
private lateinit var dbCharKey: CharArray

/**
 * Generates a new database key.
 */
fun createNewKey() {
    // This is the raw key that we'll be encrypting + storing
    rawByteKey = generateRandomKey()
    // This is the key that will be used by Room

shafty023

/**
 * Generates a random 32 byte key.
 *
 * @return a byte array containing random values
 */
fun generateRandomKey(): ByteArray =
    ByteArray(32).apply {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            SecureRandom.getInstanceStrong().nextBytes(this)
        } else {

shafty023

/*
 * Copyright (c) 2016 AirWatch, LLC. All rights reserved.
 * This product is protected by copyright and intellectual property laws in
 * the United States and other countries as well as by international treaties.
 * AirWatch products may be covered by one or more patents listed at
 * http://www.vmware.com/go/patents.
 */
package com.boxer.sdk;

import android.content.Context;