Проблема с шифрованием файлов Rijndael
Я хочу зашифровать большие файлы с помощью Rijndael, но получаю ошибку исключения из памяти. Есть идеи? Вот мой код
public void Rijndael_EncryptFile(string password, string filepath, int opt)
{
try
{
byte[] keyBytes;
keyBytes = Encoding.Unicode.GetBytes(password);
Rfc2898DeriveBytes derivedKey = new Rfc2898DeriveBytes(password, keyBytes);
RijndaelManaged rijndaelCSP = new RijndaelManaged();
rijndaelCSP.BlockSize = opt; //128 256
rijndaelCSP.KeySize = opt; //128 256
rijndaelCSP.Key = derivedKey.GetBytes(rijndaelCSP.KeySize / 8);
rijndaelCSP.IV = derivedKey.GetBytes(rijndaelCSP.BlockSize / 8);
rijndaelCSP.Mode = CipherMode.CFB;
rijndaelCSP.Padding = PaddingMode.Zeros;
ICryptoTransform encryptor = rijndaelCSP.CreateEncryptor();
FileStream inputFileStream = new FileStream(filepath, FileMode.Open, FileAccess.Read);
byte[] inputFileData = new byte[(int)inputFileStream.Length];
inputFileStream.Read(inputFileData, 0, (int)inputFileStream.Length);
FileStream outputFileStream = new FileStream(filepath + ".enc", FileMode.Create, FileAccess.Write);
CryptoStream encryptStream = new CryptoStream(outputFileStream, encryptor, CryptoStreamMode.Write);
encryptStream.Write(inputFileData, 0, (int)inputFileStream.Length);
encryptStream.FlushFinalBlock();
rijndaelCSP.Clear();
encryptStream.Close();
inputFileStream.Close();
outputFileStream.Close();
}
}