public void Schnorrsig_Wrong_Verify()
{
using (var secp256k1 = new Secp256k1())
using (var schnorrSig = new Schnorr())
{
var keyPair = secp256k1.GenerateKeyPair();
var msg = "Message for signing";
var msgBytes = Encoding.UTF8.GetBytes(msg);
var msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var sig = schnorrSig.Sign(msgHash, keyPair.PrivateKey);
Assert.NotNull(sig);
Assert.InRange(sig.Length, 0, Constant.SIGNATURE_SIZE);
msg = "Wrong message for signing";
msgBytes = Encoding.UTF8.GetBytes(msg);
msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var valid = schnorrSig.Verify(sig, msgHash, keyPair.PublicKey);
Assert.False(valid);
}
}
public Transaction.Transaction SignWith(Transaction.Transaction tx, Account signer)
{
BalanceResult result;
if (signer == null)
{
throw new Exception("account not exists");
}
if (string.IsNullOrEmpty(tx.Nonce))
{
try
{
result = this.Provider.GetBalance(signer.Address).Result;
tx.Nonce = result.Nonce + 1;
}
catch (Exception e)
{
throw new Exception("cannot get nonce", e);
}
}
tx.SenderPubKey = signer.GetPublicKey();
byte[] message = tx.Bytes();
Signature signature = Schnorr.Sign(signer.Keys, message);
tx.Signature = (signature.ToString().ToLower());
return(tx);
}
public void Schnorrsig_Verify_Batch()
{
using (var secp256k1 = new Secp256k1())
using (var schnorrSig = new Schnorr())
{
var signatures = new List <byte[]>();
var messages = new List <byte[]>();
var publicKeys = new List <byte[]>();
for (int i = 0; i < 10; i++)
{
var keyPair = secp256k1.GenerateKeyPair();
var msg = $"Message for signing {i}";
var msgBytes = Encoding.UTF8.GetBytes(msg);
var msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var sig = schnorrSig.Sign(msgHash, keyPair.PrivateKey);
Assert.NotNull(sig);
Assert.InRange(sig.Length, 0, Constant.SIGNATURE_SIZE);
signatures.Add(sig);
messages.Add(msgHash);
publicKeys.Add(keyPair.PublicKey);
}
var valid = schnorrSig.VerifyBatch(signatures, messages, publicKeys);
Assert.True(valid);
}
}
public TransactionPayload SignWith(TransactionPayload tx, Account signer, bool getNonce = false)
{
if (signer == null)
{
throw new Exception("account not exists");
}
try
{
if (getNonce)
{
var result = _zil.GetBalance(signer.Address).Result;
tx.Nonce = (int)result.Nonce + 1;
}
}
catch (Exception e)
{
throw new Exception("cannot get nonce", e);
}
tx.PubKey = signer.GetPublicKey();
byte[] message = tx.Encode();
Signature signature = Schnorr.Sign(signer.KeyPair, message);
tx.Signature = (signature.ToString().ToLower());
return(tx);
}
public void Schnorrsig_Serialize()
{
using (var secp256k1 = new Secp256k1())
using (var schnorrSig = new Schnorr())
{
var keyPair = secp256k1.GenerateKeyPair();
var msg = "Message for signing";
var msgBytes = Encoding.UTF8.GetBytes(msg);
var msgHash = System.Security.Cryptography.SHA256.Create().ComputeHash(msgBytes);
var sigIn = schnorrSig.Sign(msgHash, keyPair.PrivateKey);
var sigOut = schnorrSig.Serialize(sigIn);
Assert.NotNull(sigOut);
Assert.InRange(sigOut.Length, 0, Constant.SIGNATURE_SIZE);
}
}
public void HelpTest()
{
Trace.WriteLine(Schnorr.Help());
}
public static string GeneratePrivateKey()
{
ECKeyPair keys = Schnorr.GenerateKeyPair();
return(keys.PrivateKey.ToString(8));
}
