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I'm developing ftp application in c# winform framework 3.5 visual studio 2008.
algorithm im using for encryption is "RijndaelManaged" but in decryption getting error.
i scheduling time it automatically uploads all files from specific directory(client system) to FTP server, pls suggests me which algorithm is used for ftp in c#...

here is my code.

C#

public static void EncryptFile(string inputFile, string outputFile, string skey)
      {
          RijndaelManaged aes = new RijndaelManaged();
          try
          {
              byte[] key = ASCIIEncoding.UTF8.GetBytes(skey);

              using (FileStream fsCrypt = new FileStream(outputFile, FileMode.Create))
              {
                  using (CryptoStream cs = new CryptoStream(fsCrypt, aes.CreateEncryptor(key, key), CryptoStreamMode.Write))
                  {
                      using (FileStream fsIn = new FileStream(inputFile, FileMode.Open))
                      {
                          int data;

                          while ((data = fsIn.ReadByte()) != -1)
                          {
                              cs.WriteByte((byte)data);
                          }

                          aes.Clear();
                      }
                  }
              }
          }
          catch (Exception ex)
          {
              Console.WriteLine(ex.Message);
              aes.Clear();
          }
      }

C#

private static void DecryptFile(string inputFile, string outputFile, string skey)
        {
            RijndaelManaged aes = new RijndaelManaged();

            try
            {
                byte[] key = ASCIIEncoding.UTF8.GetBytes(skey);

                using (FileStream fsCrypt = new FileStream(inputFile, FileMode.Open))
                {
                    using (FileStream fsOut = new FileStream(outputFile, FileMode.Create))
                    {
                        using (CryptoStream cs = new CryptoStream(fsCrypt, aes.CreateDecryptor(key, key), CryptoStreamMode.Read))
                        {
                            int data;

                            while ((data = cs.ReadByte()) != -1)
                            {
                                fsOut.WriteByte((byte)data);
                            }

                            aes.Clear();
                        }
                    }
                }

            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                aes.Clear();
            }
        }

C#

..
}
catch (UnclearQuestionException uqex)
{
    MessageBox.Show("Your question is not clear. Please tell us more about the exception you see!");
}

love it !

Member 8653959 wrote:
pls suggests me which algorithm is used for ftp in c#...

There's no algorithm, FTP is a protocol. It works with bytes, and cares little about it's contents.

I suggest you divide this into two separate problems; encrypting/decrypting a local file, and uploading/downloading a file. Once both problems are solved, combine them.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]
They hate us for our freedom![^]

yup - that'd be the way .. I love it when someone comes to me and says 'my program does this and this and this but doesnt work' ... and I reply 'a) define doesnt work and b) does each of those seperate parts work independently before you try and put them together, hmmmm ?' - admittedly, I need to learn more about unit testing with frameworks, but I usually do a better job

'g'