DoEncryption

DoEncryption.cs

public static byte[] iv;
private void DoEncryption(string src, string dest)
{ 
	IKey secretKey = GetKeyFromKeyStore(); 
	Cipher cipher = Cipher.GetInstance("AES/GCM/NoPadding");
	cipher.Init(Javax.Crypto.CipherMode.EncryptMode, secretKey);

	iv = cipher.GetIV();
	//var ivString = Base64.EncodeToString(iv, Base64Flags.NoWrap); //converted iv byte to string 
	var bytes = System.IO.File.ReadAllBytes(src);
	var encryption = cipher.DoFinal(bytes); 
	System.IO.File.WriteAllBytes(dest, encryption);
	if (System.IO.File.Exists(dest))
	{
		System.IO.File.Delete(src); 
	} 
}