bchain_sign_hash.cs

Example of a signature using the blockchain module.

See Note on examples.

using Dinamo.Hsm;
using System;
using System.Text;
using System.IO;
 
namespace BchainSignHash
{
    class Program
    {
        private static String addr = "127.0.0.1";
        private static String userId = "master";
        private static String userPwd = "12345678";
 
        static void Main(string[] args)
        {
            String keyId = "key";
 
            DinamoClient api = new DinamoClient();
            try {
                /*
                    Connect to HSM
                */
                api.Connect(addr, userId, userPwd);
                Console.Out.WriteLine("Connected successfully!");
 
                api.RemoveObjectIfExists(keyId);
 
                /*
                  Generates the XPriv BIP-32 key.
                */
                api. BchainCreateXPrvBip32(keyId, DinamoApi.DN_BCHAIN_VER_BIP32_MAINNET, false, false);
                Console.Out.WriteLine("Key generated successfully!");
 
                /*
                    Hash to be signed. Keccack-256 from the text "12345678".
                    The hash should ideally be generated in software external to the HSM.
                */
                var hash = new byte[] { 0xa9, 0x22, 0x4f, 0xaa, 0x7b, 0xc2, 0x36, 0x09,
                                        0x1f, 0x61, 0x53, 0xe7, 0xce, 0x01, 0x3a, 0x1b,
                                        0x0a, 0x2c, 0x80, 0x2c, 0x18, 0xa7, 0xce, 0xdf,
                                        0xeb, 0x70, 0x8f, 0x21, 0x17, 0x35, 0x90, 0x32 };
 
                /*
                    Signs the hash with the previously generated private key.
                */
                var signature = api. BchainSignHash(DinamoApi.DN_BCHAIN_SIG_DER_ECDSA,
                                                   DinamoApi.DN_BCHAIN_HASH_KECCAK256,
                                                   hash, keyId);
                Console.Out.WriteLine("Signature: " + BitConverter.ToString(signature));
 
            } catch (DinamoException e) {
                Console.Out.WriteLine(e.Message);
            } finally{
                /*
                    Disconnects from HSM
                */
                api.Disconnect();
                Console.Out.WriteLine("Successfully disconnected!");
            }
        }
    }
}