/// <summary>
/// Encapsulates logic to decrypt keys so that it is not repeated.
/// </summary>
/// <param name="encKey">Encrypted key that needs decrypting with programs master key</param>
/// <param name="IV">Initialisation vector that key was encrypted with</param>
/// <returns>byte array representing key</returns>
private byte[] decryptKey(byte[] encKey, byte[] IV)
{
byte[] masterKey = Globals.getMasterKey(); //gets master key to decrypt these keys with
byte[] decryptedKey = CryptoUtility.AESDecryptBytes(encKey, masterKey, IV); //decrypts key
return(decryptedKey);
}