/// <summary>
/// Convert recovery phrase to SSB.Keys
/// </summary>
/// <param name="words"></param>
/// <returns></returns>
public Keys WordsToKeys(string words)
{
var wordArr = words.Trim().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
var amount = wordArr.Length;
if (amount != 24 && amount != 48)
{
throw new ArgumentException("there should be 24 or 48 words");
}
var fixedWords = string.Join(" ", SubArray(wordArr, 0, 24));
BIP39 bip39 = new BIP39(fixedWords, "", BIP39.Language.English);
var seed = bip39.EntropyBytes;
Rebex.Security.Cryptography.Ed25519 ed25519 = new Rebex.Security.Cryptography.Ed25519();
ed25519.FromSeed(seed);
var secretKey = ed25519.GetPrivateKey();
var publicKey = ed25519.GetPublicKey();
var _public = Convert.ToBase64String(publicKey) + ".ed25519";
var _private = Convert.ToBase64String(secretKey) + ".ed25519";
var keys = new Keys
{
Curve = "ed25519",
Public = _public,
Private = _private,
ID = "@" + _public,
};
return(keys);
}
public Key(string seed = null)
{
_ed25519 = new Rebex.Security.Cryptography.Ed25519();
_sha256 = new SHA256Managed();
_ed25519.FromSeed(
_sha256.ComputeHash(string.IsNullOrEmpty(seed) ? GetSeedKey() : Encoding.UTF8.GetBytes(seed)));
_publicKey = _ed25519.GetPublicKey();
_privateKey = _ed25519.GetPrivateKey();
}
private void button1_Click(object sender, EventArgs e)
{
var timestamp = System.DateTime.UtcNow.ToFileTimeUtc().ToString();
using (var hmacsha256 = new HMACSHA256(GetKey()))
{
hmacsha256.Initialize();
var hash = hmacsha256.ComputeHash(Encoding.UTF8.GetBytes(textBox1.Text));
var ed25519 = new Rebex.Security.Cryptography.Ed25519();
ed25519.FromSeed(hash);
label1.Text = $@"Key:{ByteToString( ed25519.GetPrivateKey())} Hash:{ByteToString(hash)}";
}
}
public static Ed25519Signature Sign(byte[] payload, Ed25519Seed seed)
{
var ed25519 = new Rebex.Security.Cryptography.Ed25519();
ed25519.FromSeed(seed.SecretKey.Take(32).ToArray());
var signature = ed25519.SignMessage(payload);
return(new Ed25519Signature
{
PublicKey = seed.KeyPair.PublicKey.ToHex(),
Signature = signature.ToHex()
});
}