Шифрование CipherOutputStream

encrypt.init(Cipher.ENCRYPT_MODE, key, iv);
 
CipherOutputStream output = new CipherOutputStream(outFileStream, encrypt);
 
byte[] buffer = new byte[buffSize];
while ((read = input.read(buffer, 0, buffSize)) >= 0)
{
       output.write(buffer, 0, read);
}
output.close();

try (InputStream input = new FileInputStream(pathToFile))
{
            Cipher encrypt = Cipher.getInstance(transf);
            SecretKey key = getKey(alg, keyLength); // функция, которая для каждого поддерживаемого алгоритма генерит ключ
            IvParameterSpec iv = new IvParameterSpec(key.getEncoded());
            encrypt.init(Cipher.ENCRYPT_MODE, key, iv);
 
            CipherOutputStream output = new CipherOutputStream(outFileStream, encrypt);
 
            byte[] buffer = new byte[buffSize];
            while ((read = input.read(buffer, 0, buffSize)) >= 0)
            {
                output.write(buffer, 0, read);
            }
            output.close();
}
catch ( )
{
}

        try
        {
            FileOutputStream output = new FileOutputStream(outFile);
 
            Cipher decrypt = Cipher.getInstance(transf);
            IvParameterSpec iv = new IvParameterSpec(key.getEncoded());
            decrypt.init(Cipher.DECRYPT_MODE, key, iv);
            FileInputStream in = new FileInputStream(file);
            CipherInputStream input = new CipherInputStream(in, decrypt);
 
            int read = 0;
            byte[] buffer = new byte[buffSize];
            while ((read = input.read(buffer, 0, buffSize)) >= 0)
            {
                output.write(buffer, 0, read);
            }
            output.close();
        }
        catch( )
        {
        }