Encryption And Decryption Using A Symmetric Key(AES) using x++ in D365FO

 

Encryption And Decryption Using A Symmetric Key(AES) using x++

 Encryption And Decryption Using A Symmetric Key(AES) using x++.

I received a requirement to generate an XML file with encrypted data using a symmetric key. The recipients on the other side will decrypt the text using the same symmetric key. To test this, I used a dummy value such as 'RRR'.

To achieve this, I wrote the code in C# and added the resulting DLL to my project references.

C# Code:

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

namespace EncryptionDecryptionUsingSymmetricKey
{
    public class AesOperation
    {
        public static string EncryptString(string key, string plainText)
        {
            byte[] iv = new byte[16];
            byte[] array;

            using (Aes aes = Aes.Create())
            {
                aes.Key = Encoding.UTF8.GetBytes(key);
                aes.IV = iv;

                ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);

                using (MemoryStream memoryStream = new MemoryStream())
                {
                    using (CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter streamWriter = new StreamWriter((Stream)cryptoStream))
                        {
                            streamWriter.Write(plainText);
                        }

                        array = memoryStream.ToArray();
                    }
                }
            }

            return Convert.ToBase64String(array);// It will convert bytes to string
        }

        public static string DecryptString(string key, string cipherText)
        {
            byte[] iv = new byte[16];
            byte[] buffer = Convert.FromBase64String(cipherText); // It will convert string to bytes


            using (Aes aes = Aes.Create())
            {
                aes.Key = Encoding.UTF8.GetBytes(key);
                aes.IV = iv;
				
                ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);

                using (MemoryStream memoryStream = new MemoryStream(buffer))
                {
                    using (CryptoStream cryptoStream = new CryptoStream((Stream)memoryStream, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader streamReader = new StreamReader((Stream)cryptoStream))
                        {
                            return streamReader.ReadToEnd();
                        }
                    }
                }
            }
        }
    }
}

X++ Code:

b14ca5898a4e4133bbce2ea2315a1916

Using EncryptionDecryptionUsingSymmetricKey;

internal final class TestRunnableClass1
{
    public static void main(Args _args)
    {
        str key = "b65ff7654brt8799fghj4ed7892b6798";
 
        str	text = 'RRR';
 
        str encryptedString = AesOperation::EncryptString(key, text);
 
        info(encryptedString);
 
        str decryptedString = AesOperation::DecryptString(key, encryptedString);
 
        info(decryptedString);
    }
}

References   Ref1  Ref2 and https://sheriffayed23.blogspot.com/2023/11/encryption-and-decryption-using.html