Encryption and decryption the Data with Secret key

Hi Sir

a am apply this code but encryption value is different 

this code is apply encryption value: DaFIzm+1j3DLhZ4J9pFUzQ==

Here is a simple implementation in C#:

Add the necessary imports:

using System;
using System.Security.Cryptography;
using System.Text;

public class AesEncryption
{
    public static string Encrypt(string plainText, string key)
    {
        byte[] keyBytes = Encoding.UTF8.GetBytes(key);
        byte[] inputBytes = Encoding.UTF8.GetBytes(plainText);
        
        using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = keyBytes;
            aesAlg.Mode = CipherMode.ECB;
            aesAlg.Padding = PaddingMode.PKCS7;

            ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
            
            byte[] encryptedBytes = encryptor.TransformFinalBlock(inputBytes, 0, inputBytes.Length);

            return Convert.ToBase64String(encryptedBytes);
        }
    }

    public static string Decrypt(string encryptedText, string key)
    {
        byte[] keyBytes = Encoding.UTF8.GetBytes(key);
        byte[] encryptedBytes = Convert.FromBase64String(encryptedText);

        using (Aes aesAlg = Aes.Create())
        {
            aesAlg.Key = keyBytes;
            aesAlg.Mode = CipherMode.ECB;
            aesAlg.Padding = PaddingMode.PKCS7;

            ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);
            
            byte[] decryptedBytes = decryptor.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);

            return Encoding.UTF8.GetString(decryptedBytes);
        }
    }

    public static void Main(string[] args)
    {
        string key = "your_32_byte_long_secret_key_here"; // Must be 32 bytes for AES-256
        string original = "Hello, World!";

        // Encrypt the string
        string encrypted = Encrypt(original, key);
        Console.WriteLine($"Encrypted: {encrypted}");

        // Decrypt the string
        string decrypted = Decrypt(encrypted, key);
        Console.WriteLine($"Decrypted: {decrypted}");
    }
}

Notes:

1. Key Size: Ensure that your secret key (key) is exactly 32 bytes long.
2. Mode: This example uses ECB mode as requested.
3. Padding: The padding mode used here is PKCS7, which is common and should match most tools.
4. Base64: The output is encoded in Base64 format.

How to Test:

1. Copy the code into a C# console application.
2. Replace "your_32_byte_long_secret_key_here" with your actual 32-byte key.
3. Replace "Hello, World!" with your actual plaintext data.
4. Run the program and compare the output with the results from the online tool.