逐行加密/解密文件？

Question

class Encryption
    {
        private static readonly byte[] SALT = new byte[] { 0x26, 0xdc, 0xff, 0x00, 0xad, 0xed, 0x7a, 0xee, 0xc5, 0xfe, 0x07, 0xaf, 0x4d, 0x08, 0x22, 0x3c };

        public static byte[] Encrypt(byte[] plain, string password)
        {
            MemoryStream memoryStream;
            CryptoStream cryptoStream;
            Rijndael rijndael = Rijndael.Create();
            Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password, SALT);
            rijndael.Key = pdb.GetBytes(32);
            rijndael.IV = pdb.GetBytes(16);
            memoryStream = new MemoryStream();
            cryptoStream = new CryptoStream(memoryStream, rijndael.CreateEncryptor(), CryptoStreamMode.Write);
            cryptoStream.Write(plain, 0, plain.Length);
            cryptoStream.FlushFinalBlock();
            cryptoStream.Close();
            return memoryStream.ToArray();
        }

        public static byte[] Decrypt(byte[] cipher, string password)
        {
            MemoryStream memoryStream;
            CryptoStream cryptoStream;
            Rijndael rijndael = Rijndael.Create();
            Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(password, SALT);
            rijndael.Key = pdb.GetBytes(32);
            rijndael.IV = pdb.GetBytes(16);
            memoryStream = new MemoryStream();
            cryptoStream = new CryptoStream(memoryStream, rijndael.CreateDecryptor(), CryptoStreamMode.Write);
            cryptoStream.Write(cipher, 0, cipher.Length);
            cryptoStream.FlushFinalBlock();
            cryptoStream.Close();
            return memoryStream.ToArray();
        }
    }

       private void EncryptFile(string filepath, string outputPath, string password)
        {
            FileInfo fileInfo = new FileInfo(filepath);
            string filename = fileInfo.Name;

            string fullpath = outputPath + "\\" + filename;

            BinaryWriter writer = new BinaryWriter(File.OpenWrite(fullpath), Encoding.ASCII);

            /// Two methods that I've attempted here:
            /// 1.  The desired method: encrypt line by line - I assumed I'd be able to generate
            ///     multiple blocks of data and decrypt them later.  This isn't working

            //string[] lines = File.ReadAllLines(filepath);

            /// 2.  Just read the whole thing and encrypt and write it in one swoop.

            string line = File.ReadAllText(filepath);

            //foreach(string line in lines)
            {
                byte[] bytes = Encoding.ASCII.GetBytes(line);
                byte[] encoded = Encryption.Encrypt(bytes, password);

                writer.Write(encoded);
                writer.Flush();
            }

            writer.Close();
        }



        private void DecryptFile(string filepath, string outputPath, string password)
        {
            FileInfo fileInfo = new FileInfo(filepath);
            string filename = fileInfo.Name;
            string fullpath = outputPath + "\\" + filename;

            StreamWriter writer = new StreamWriter(fullpath, false, Encoding.UTF8);

            byte[] bytes = File.ReadAllBytes(filepath);

            ///  Here is the method that's working at the moment for decrypting; just
            ///  grab all the data and decrypt it on one swoop.

            byte[] decrypted = Encryption.Decrypt(bytes, password);

            string s = Encoding.ASCII.GetString(decrypted);

            writer.Write(s);
            writer.Flush();


            ///  I've tried a number of things here to decrypt line by line,
            ///  none of which work.  This crashes with an issue about the padding
            ///  being invalid.  

            /*
            int index = 0;
            int count = 32;

            while (index 

我不完全确定我该做什么了。我一直在网上到处乱翻东西，通读例子，但它们似乎都是如何加密一整个文件，或者只是加密一段数据，除了立即再次解密之外什么也不做。我该如何处理逐行书写？

Answer 1

而不是为您编程，我将给您一个方案，您可以实现。

如果您有每行加密，我想您希望能够解密每行以及。请注意，“行”对于计算机来说是一个相当不方便的术语。只是一堆以某种台词终结者结尾的角色。字符本身使用特定的字符编码进行编码。

此外，我将做以下假设：

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