/// <summary> /// Encrypted version of PlayerPrefs.SetString(), stored key and value is encrypted in player prefs /// </summary> public static void SetEncryptedString(string key, string value) { string encryptedKey = SimpleEncryption.EncryptString(key); string encryptedValue = SimpleEncryption.EncryptString(value); // Store the encrypted key and value (with relevant identifying prefixes) in PlayerPrefs PlayerPrefs.SetString(KEY_PREFIX + encryptedKey, VALUE_STRING_PREFIX + encryptedValue); }
/// <summary> /// Encrypts the specified int value and returns an encrypted string /// </summary> public static string EncryptInt(int value) { // Convert the int value into its 4 bytes byte[] bytes = BitConverter.GetBytes(value); // Represent those bytes as a base 64 string string base64 = Convert.ToBase64String(bytes); // Return the encrypted version of that base 64 string return(SimpleEncryption.EncryptString(base64)); }
/// <summary> /// Decrypts the encrypted string representing an int into the decrypted int /// </summary> public static int DecryptInt(string sourceString) { // Decrypt the encrypted string string decryptedString = SimpleEncryption.DecryptString(sourceString); // Convert the decrypted Base 64 representation back into bytes byte[] bytes = Convert.FromBase64String(decryptedString); // Turn the bytes back into a int and return it return(BitConverter.ToInt32(bytes, 0)); }
/// <summary> /// Decrypts the specified key /// </summary> public static string DecryptKey(string encryptedKey) { if (encryptedKey.StartsWith(KEY_PREFIX)) { // Remove the key prefix from the encrypted key string strippedKey = encryptedKey.Substring(KEY_PREFIX.Length); // Return the decrypted key return(SimpleEncryption.DecryptString(strippedKey)); } else { throw new InvalidOperationException("Could not decrypt item, no match found in known encrypted key prefixes"); } }
/// <summary> /// Encrypted version of PlayerPrefs.GetString(), an unencrypted key is passed and the value is returned decrypted /// </summary> public static string GetEncryptedString(string key, string defaultValue = "") { // Encrypt and prefix the key so we can look it up from player prefs string encryptedKey = KEY_PREFIX + SimpleEncryption.EncryptString(key); // Look up the encrypted value string fetchedString = PlayerPrefs.GetString(encryptedKey); if (!string.IsNullOrEmpty(fetchedString)) { // Strip out the type identifier character fetchedString = fetchedString.Remove(0, 1); // Decrypt and return the string value return(SimpleEncryption.DecryptString(fetchedString)); } else { // No existing player pref value, so return defaultValue instead return(defaultValue); } }
/// <summary> /// Helper method that can handle any of the encrypted player pref types, returning a float, int or string based /// on what type of value has been stored. /// </summary> public static object GetEncryptedValue(string encryptedKey, string encryptedValue) { // See what type identifier the encrypted value starts if (encryptedValue.StartsWith(VALUE_FLOAT_PREFIX)) { // It's a float, so decrypt it as a float and return the value return(GetEncryptedFloat(SimpleEncryption.DecryptString(encryptedKey.Substring(KEY_PREFIX.Length)))); } else if (encryptedValue.StartsWith(VALUE_INT_PREFIX)) { // It's an int, so decrypt it as an int and return the value return(GetEncryptedInt(SimpleEncryption.DecryptString(encryptedKey.Substring(KEY_PREFIX.Length)))); } else if (encryptedValue.StartsWith(VALUE_STRING_PREFIX)) { // It's a string, so decrypt it as a string and return the value return(GetEncryptedString(SimpleEncryption.DecryptString(encryptedKey.Substring(KEY_PREFIX.Length)))); } else { throw new InvalidOperationException("Could not decrypt item, no match found in known encrypted key prefixes"); } }