public static int GetSeedVersion(string input)
{
var mnemo = new NBitcoin.Mnemonic(NormalizeSeedPhrase(input));
var encoding = Encoding.UTF8;
var keyByte = encoding.GetBytes("Seed version");
var hmacsha512 = new HMACSHA512(keyByte);
var messageBytes = encoding.GetBytes(mnemo.ToString());
var hashMessage = hmacsha512.ComputeHash(messageBytes);
return(hashMessage.First());
}
private async Task <string> CreateWallet()
{
string ssMnemo = string.Empty;
await Task.Run(() =>
{
try
{
var mnemonic = new Nmnemonic(NWorldList.English, WordCount.Twelve);
ssMnemo = mnemonic.ToString();
}
catch (Exception e) { Console.WriteLine(e.Message); ssMnemo = string.Empty; }
});
return(await Task.FromResult(ssMnemo));
}
public static ExtKey GetExtRoot(string input, string passPhrase = "", RootKeyType keyType = RootKeyType.Legacy)
{
var mnemo = new NBitcoin.Mnemonic(NormalizeSeedPhrase(input));
byte[] pbkf_hmacked;
{
// Generate a salt
var saltBytes = Encoding.UTF8.GetBytes("electrum" + passPhrase);
// Generate the hash
// TODO: .Net Standard 2.0
var pbkdf2 = new Rfc2898DeriveBytes(
mnemo.ToString(),
saltBytes,
2048,
HashAlgorithmName.SHA512
);
var keyByte = Encoding.UTF8.GetBytes("Bitcoin seed");
var hmacsha512 = new HMACSHA512(keyByte);
pbkf_hmacked = hmacsha512.ComputeHash(pbkdf2.GetBytes(64));
}
var fullKey = new byte[4 + 1 + 4 + 4 + 32 + 1 + 32];
Array.Copy(new byte[] { 0x04, 0x88, 0xAD, 0xE4, }, fullKey, 4);
Array.Copy(pbkf_hmacked, 32, fullKey, 4 + 1 + 4 + 4, 32);
Array.Copy(pbkf_hmacked, 0, fullKey, 4 + 1 + 4 + 4 + 32 + 1, 32);
// var xpriv = Base58CheckEncoding.Encode(fullKey);
var chainCode = new byte[32];
Array.Copy(fullKey, 4 + 1 + 4 + 4, chainCode, 0, 32);
var keyHex = new byte[32];
Array.Copy(fullKey, 4 + 1 + 4 + 4 + 32 + 1, keyHex, 0, 32);
var HDRoot = new ExtKey(new Key(keyHex), chainCode);
return(HDRoot);
}