adpatado, C# - rextester

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Security.Cryptography;
using System.Text;

namespace Rextester
{
    class Program
    {
        public static void Main(string[] args)
        {
            var key = "4C1EADADB4EF5007579C919C6635B6C0919CADAD6635DB42";
            var iv = "0000000000000000";

var json = "hsmwrapper";

var c = new Program();
            var encrypted = c.crypto(json, key, iv, "encrypt");

Console.WriteLine("ENCRYPTED: {0}",encrypted);// System.Net.WebUtility.UrlEncode(encrypted));

var decrypted = c.crypto(encrypted, key, iv, "decrypt");
            Console.WriteLine("DECRYPTED: {0}", decrypted);
        }

public string crypto(string json, string key, string iv, string type)
        {
            byte[] results;
            System.Text.UTF8Encoding UTF8 = new System.Text.UTF8Encoding();

MD5CryptoServiceProvider hashProvider = new MD5CryptoServiceProvider();
            TripleDESCryptoServiceProvider tripDES = new TripleDESCryptoServiceProvider();

// MD5 the key
            //byte[] tdeskey = hashProvider.ComputeHash(UTF8Encoding.UTF8.GetBytes(key)); //hashProvider.ComputeHash(UTF8.GetBytes(key));

// Set Key
            tripDES.Key =  Enumerable.Range(0, key.Length)
                    .Where(x => x % 2 == 0)
                    .Select(x => Convert.ToByte(key.Substring(x, 2), 16)).ToArray();
            
            // Set IV
            tripDES.IV = Enumerable.Range(0, iv.Length)
                    .Where(x => x % 2 == 0)
                    .Select(x => Convert.ToByte(iv.Substring(x, 2), 16)).ToArray();
            
            // Use CBC for mode
            tripDES.Mode = CipherMode.CBC;
            
            // Zero Padding
            tripDES.Padding = PaddingMode.Zeros;

byte[] data = null;
            ICryptoTransform enc = null;

switch (type)
            {
                case "encrypt":
                    enc = tripDES.CreateEncryptor();

data = Encoding.ASCII.GetBytes(json);
                    break;
                
                case "decrypt":
                    enc = tripDES.CreateDecryptor();
                    data = Enumerable.Range(0, json.Length)
                    .Where(x => x % 2 == 0)
                    .Select(x => Convert.ToByte(json.Substring(x, 2), 16)).ToArray();
                    break;
            }

try
            {
                results = enc.TransformFinalBlock(data, 0, data.Length);
            }
            finally
            {
                tripDES.Clear();
                hashProvider.Clear();
            }

if (type == "decrypt")
                return Encoding.UTF8.GetString(results);//Encoding.ASCII.GetString(results);
            else
            {
                return ByteArrayToString(results);
            }

}
        
        public string ByteArrayToString(byte[] byteArray)
        {
          var hex = new StringBuilder(byteArray.Length * 2);
          foreach (var b in byteArray)
            hex.AppendFormat("{0:x2}", b);
          return hex.ToString();
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 13 Mb, average nr of threads: 3