m_of_n.cs

Example of splitting and retrieving a secret using M from N.

See Note on examples.

using Dinamo.Hsm;
using System;
using System.Text;
using System.IO;
 
namespace MofN
{
    class Program
    {
        private static String addr = "127.0.0.1";
 
        static void Main(string[] args)
        {
            DinamoClient api = new DinamoClient();
            try {
                /*
                    Connect using an anonymous session in HSM.
                    You don't need a user account to perform this operation.
                */
                api.ConnectAnonymously(addr);
                Console.Out.WriteLine("Successfully connected anonymously!");
 
                /*
                    It divides the secret into an M of N scheme, where there is a set of
                    6 parts and 2 parts are needed to rebuild the secret.
 
                    In this case, as null was passed in the secret parameter, the secret is
                    randomly generated within the HSM.
                */
                var splitInfo = api. MofNSplit(2, 6, null);
                Console.Out.WriteLine("Secret split successfully!");
                Console.Out.WriteLine("Secret: " + BitConverter.ToString(splitInfo.pbSecret).Replace("-", ""));
                Console.Out.WriteLine("Total parts: " + splitInfo.dwPartCount);
 
                for (UInt32 i = 0; i < splitInfo.dwPartCount; i++) {
                    Console.Out.WriteLine("Part " + (i + 1) + ": " + BitConverter.ToString(splitInfo.pstParts[i].pbPart).Replace("-", ""));
                }
 
                /*
                  Recover the secret from 2 parts.
                */
                DinamoApi.DN_M_OF_N_PART []parts = new DinamoApi.DN_M_OF_N_PART[2];
                parts[0] = splitInfo.pstParts[0];
                parts[1] = splitInfo.pstParts[1];
 
                var recoveredSecret = api. MofNRecover(parts);
 
                Console.Out.WriteLine("Secret successfully retrieved!");
                Console.Out.WriteLine("Recovered secret: " + BitConverter.ToString(recoveredSecret).Replace("-", ""));
            } catch (DinamoException e) {
                Console.Out.WriteLine(e.Message);
            } finally{
                /*
                    Disconnects from HSM
                */
                api.Disconnect();
                Console.Out.WriteLine("Successfully disconnected!");
            }
        }
    }
}