Testing a native DLL with C#.

CakeTest.cs

using System;
using System.Runtime.InteropServices;

namespace CakeTest
{
    class Program
    {
        [DllImport("Cake")]
        private static extern IntPtr GetHttpEncryptHeader();

        [DllImport("Cake")]
        private static extern IntPtr GetHttpEncryptVersion();

        static void Main(string[] args)
        {
            var EncryptHeader = Marshal.PtrToStringAnsi(GetHttpEncryptHeader());
            var EncryptVersion = Marshal.PtrToStringAnsi(GetHttpEncryptVersion());

            Console.WriteLine("EncryptHeader  = {0}", EncryptHeader);
            Console.WriteLine("EncryptVersion = {0}", EncryptVersion);

            Console.ReadLine();
        }
    }
}

ChiffreTest.cs

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace chiffre_test
{
    class Program
    {
        [DllImport("chiffre")]
        private static extern void calcB2b(int dstSize, [Out] byte[] dst, int srcSize, [In] byte[] src);

        public static void calcDigest(byte[] dst, byte[] src)
        {
            calcB2b(32, dst, src.Length, src);
        }

        static void Main(string[] args)
        {
            byte[] bytes = Encoding.UTF8.GetBytes("test");
            byte[] array = new byte[32];
            calcDigest(array, bytes);
            Console.WriteLine(Encoding.UTF8.GetString(array));
            Console.ReadKey();
        }
    }
}