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Home Forums Can we create our encryption logic on C#? – MindStick
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1 Answers

Aryan Kumar
Aryan Kumar 25 Sep 2023
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Yes, indeed, you can create your encryption logic in C#. C# is a versatile programming language that provides libraries and tools to implement various encryption algorithms and techniques. Below, I'll provide you with a simplified example of how to perform encryption and decryption using the Advanced Encryption Standard (AES) algorithm, a widely used encryption method:

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;
class Program
{
   static void Main()
   {
       string originalText = "This is a secret message.";
       // Generate a random encryption key and initialization vector (IV)
       byte[] key = new byte[16]; // 128 bits
       byte[] iv = new byte[16];  // 128 bits
       using (var rng = new RNGCryptoServiceProvider())
       {
           rng.GetBytes(key);
           rng.GetBytes(iv);
       }
       // Encrypt the text
       byte[] encryptedBytes = Encrypt(originalText, key, iv);
       // Decrypt the text
       string decryptedText = Decrypt(encryptedBytes, key, iv);
       // Display the results
       Console.WriteLine("Original Text: " + originalText);
       Console.WriteLine("Encrypted Text: " + Convert.ToBase64String(encryptedBytes));
       Console.WriteLine("Decrypted Text: " + decryptedText);
   }
   static byte[] Encrypt(string plainText, byte[] key, byte[] iv)
   {
       using (Aes aesAlg = Aes.Create())
       {
           aesAlg.Key = key;
           aesAlg.IV = iv;
           ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
           using (MemoryStream msEncrypt = new MemoryStream())
           {
               using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
               {
                   using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                   {
                       swEncrypt.Write(plainText);
                   }
               }
               return msEncrypt.ToArray();
           }
       }
   }
   static string Decrypt(byte[] cipherText, byte[] key, byte[] iv)
   {
       using (Aes aesAlg = Aes.Create())
       {
           aesAlg.Key = key;
           aesAlg.IV = iv;
           ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
           using (MemoryStream msDecrypt = new MemoryStream(cipherText))
           {
               using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
               {
                   using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                   {
                       return srDecrypt.ReadToEnd();
                   }
               }
           }
       }
   }
}

Please note that this is a basic example, and real-world encryption implementations should follow best practices, such as securely storing and managing encryption keys and considering the specific security requirements of your application. Additionally, you may want to use established encryption libraries or consult with security experts when implementing encryption in a production environment.

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