sslver.cs

sslver.cs

using System;
using System.Runtime.InteropServices;

namespace sslver
{
    class Program
    {
        // Use OpenSSL_version_num on OpenSSL 1.1 or later.
        [DllImport("libcrypto", CallingConvention = CallingConvention.Cdecl)]
        public extern static uint SSLeay();

        static void Main(string[] args)
        {
            var ver = SSLeay();
            var major = (ver & 0xf0000000) >> 28;
            var minor = (ver & 0x0ff00000) >> 20;
            var fix = (ver & 0x000ff000) >> 12;
            var patchNum = (ver & 0x00000ff0) >> 4;
            char? patch = patchNum == 0 ? (char?)null : (char)('a' + patchNum - 1);
            Console.WriteLine($"libcrypto {major}.{minor}.{fix}{patch}");
        }
    }
}