ساخت کریپتر (Crypter) در سی شارپ

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private static void EncryptFile(string inputFile, string outputFile, string skey)

{

    try

    {

        using (RijndaelManaged aes = new RijndaelManaged())

        {

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

            /* This is for demostrating purposes only.

             * Ideally you will want the IV key to be different from your key and you should always generate a new one for each encryption in other to achieve maximum security*/

            byte[] IV = ASCIIEncoding.UTF8.GetBytes(skey);

            using (FileStream fsCrypt = new FileStream(outputFile, FileMode.Create))

            {

                using (ICryptoTransform encryptor = aes.CreateEncryptor(key, IV))

                {

                    using (CryptoStream cs = new CryptoStream(fsCrypt, encryptor, CryptoStreamMode.Write))

                    {

                        using (FileStream fsIn = new FileStream(inputFile, FileMode.Open))

                        {

                            int data;

                            while ((data = fsIn.ReadByte()) != -1)

                            {

                                cs.WriteByte((byte)data);

                            }

                        }

                    }

                }

            }

        }

    }

    catch (Exception ex)

    {

        // failed to encrypt file

    }

}

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private static void DecryptFile(string inputFile, string outputFile, string skey)

{

    try

    {

        using (RijndaelManaged aes = new RijndaelManaged())

        {

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

            /* This is for demostrating purposes only.

             * Ideally you will want the IV key to be different from your key and you should always generate a new one for each encryption in other to achieve maximum security*/

            byte[] IV = ASCIIEncoding.UTF8.GetBytes(skey);

            using (FileStream fsCrypt = new FileStream(inputFile, FileMode.Open))

            {

                using (FileStream fsOut = new FileStream(outputFile, FileMode.Create))

                {

                    using (ICryptoTransform decryptor = aes.CreateDecryptor(key, IV))

                    {

                        using (CryptoStream cs = new CryptoStream(fsCrypt, decryptor, CryptoStreamMode.Read))

                        {

                            int data;

                            while ((data = cs.ReadByte()) != -1)

                            {

                                fsOut.WriteByte((byte)data);

                            }

                        }

                    }

                }

            }

        }

    }

    catch (Exception ex)

    {

        // failed to decrypt file

    }

}

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EncryptFile("Location to the file we want to encrypt", "Location of the encrypted file we want to create", "Password of 16 letters/digits");

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EncryptFile("C:\\myfile.rar", "c:\\myfileEncrypted.rar", "1234512345678976");

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DecryptFile("Location of the encrypted file we want to decrypt", "Location of the decrypted file we want to create", "The password we used to encrypt the file");

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DecryptFile("C:\\myfileEncrypted.rar", "c:\\myfileDecrypted.rar", "1234512345678976");