public static Fixed8 DecodeRct(RingCTSignatureType sig, byte[] sk, int i, out byte[] mask)
{
EcdhTuple unmask;
if (sig.ecdhInfo[i].amount[0] == 0x00)
{
unmask = sig.ecdhInfo[i];
}
else
{
unmask = sig.ecdhInfo[i].EcdhDecode(sk);
}
ECPoint C = sig.outPK[i].mask;
ECPoint C_Tmp = ECCurve.Secp256r1.G * unmask.mask + RangeSignature.H * unmask.amount;
if (C.ToString() != C_Tmp.ToString())
{
throw new Exception("Amount decoded incorrectly");
}
mask = new byte[32];
Buffer.BlockCopy(unmask.mask, 0, mask, 0, unmask.mask.Length);
return(unmask.amount.ToFixed8());
}
public static RingCTSignatureType Generate(List <CTCommitment> inSK, List <MixRingCTKey> inPK, List <ECPoint> destinations, List <Fixed8> amounts, Fixed8 vPub, int mixin, UInt256 assetID, Fixed8 vPubOld)
{
RingCTSignatureType rctSig = new RingCTSignatureType();
List <CTCommitment> outSK = new List <CTCommitment>();
for (int i = 0; i < destinations.Count; i++)
{
rctSig.outPK.Add(new CTKey());
rctSig.rangeSigs.Add(new RangeProveType());
rctSig.ecdhInfo.Add(new EcdhTuple());
}
for (int i = 0; i < destinations.Count; i++)
{
rctSig.outPK[i].dest = destinations[i];
rctSig.rangeSigs[i] = RangeSignature.Generate(amounts[i]);
rctSig.outPK[i].mask = rctSig.rangeSigs[i].C;
CTCommitment outSK_i = new CTCommitment(new byte[32], rctSig.rangeSigs[i].mask);
outSK.Add(outSK_i);
rctSig.ecdhInfo[i].mask = rctSig.rangeSigs[i].mask;
rctSig.ecdhInfo[i].amount = amounts[i].ToBinaryFormat().ToBinary();
bool isEncoded = true;
if (rctSig.ecdhInfo.Count > 1)
{
isEncoded = false;
}
for (int j = 0; j < inSK.Count; j++)
{
byte[] dest_cmp = new byte[32];
if (inSK[j].dest.ToHexString() == dest_cmp.ToHexString() && inSK[j].mask.ToHexString() == dest_cmp.ToHexString())
{
isEncoded = false;
}
}
if (isEncoded)
{
rctSig.ecdhInfo[i] = rctSig.ecdhInfo[i].EcdhEncode(destinations[i]);
}
}
RingInfo ringInfo = PopulateFromBlockchain(inPK, mixin, assetID, vPubOld);
rctSig.mixRing = ringInfo.mixRingIndex;
rctSig.MG = ProveRctMG(ringInfo.mixRing, inSK, outSK, rctSig.outPK, vPub, ringInfo.index);
rctSig.vPub = vPub;
return(rctSig);
}
public void RingCT_Test()
{
List <CTCommitment> inSK = new List <CTCommitment>();
List <CTKey> inPK = new List <CTKey>();
List <MixRingCTKey> inPKIndex = new List <MixRingCTKey>();
List <ECPoint> destinations = new List <ECPoint>();
List <Fixed8> amounts = new List <Fixed8>();
int mixin = 3;
byte[] out_amount = new byte[32];
byte[] out_mask = new byte[32];
for (int i = 0; i < 2; i++)
{
byte[] sk = new byte[32]; //SchnorrNonLinkable.GenerateRandomScalar();
ECPoint pk = ECCurve.Secp256r1.G * sk;
byte[] mask = new byte[32]; //SchnorrNonLinkable.GenerateRandomScalar(); /// Get from Tx
Fixed8 amount = Fixed8.One * 100;
byte[] b_amount = amount.ToBinaryFormat().ToBinary();
ECPoint C_i_in = RingCTSignature.GetCommitment(mask, b_amount);
out_amount = ScalarFunctions.Add(out_amount, b_amount);
out_mask = ScalarFunctions.Add(out_mask, mask);
CTKey key = new CTKey(pk, C_i_in);
UInt256 genesisHash = new UInt256(new byte[32]);
MixRingCTKey mixRingKey = new MixRingCTKey(genesisHash, 0xff, 0xff);
CTCommitment i_insk = new CTCommitment(sk, mask);
inSK.Add(i_insk);
inPK.Add(key);
inPKIndex.Add(mixRingKey);
}
byte[] dest_sk = SchnorrNonLinkable.GenerateRandomScalar();
ECPoint dest_pk = ECCurve.Secp256r1.G * dest_sk;
destinations.Add(dest_pk);
amounts.Add(Fixed8.One * 201);
RingCTSignatureType sig = RingCTSignature.Generate(inSK, inPKIndex, destinations, amounts, -Fixed8.One, mixin, Pure.Core.Blockchain.GoverningToken.Hash, Fixed8.Zero);
RingCTSignature.Verify(sig, Fixed8.Zero).Should().Be(true);
byte[] tmask;
Fixed8 dstAmount = RingCTSignature.DecodeRct(sig, dest_sk, 0, out tmask);
dstAmount.Should().Be(Fixed8.One * 201);
}
public static bool Verify(RingCTSignatureType sig, Fixed8 vPubOld)
{
bool result = true;
for (int i = 0; i < sig.outPK.Count; i++)
{
bool rangeVerify = RangeSignature.Verify(sig.outPK[i].mask, sig.rangeSigs[i].rangeSig);
result = result && rangeVerify;
}
List <List <CTKey> > mixRing = GetRingKeyFromIndex(sig.mixRing, vPubOld);
bool mgVer = VerRctMG(sig.MG, mixRing, sig.outPK, sig.vPub);
return(result && mgVer);
}
private void BtnMakeTx_Click(object sender, RoutedEventArgs e)
{
StealthKeyPair FromAddr = new StealthKeyPair(txbFromPayloadPriv.Text.HexToBytes(), txbFromViewPriv.Text.HexToBytes());
StealthKeyPair ToAddr = Wallet.ToStealthKeyPair(txbToTxAddress.Text);
Fixed8 amount = Fixed8.Parse(txbAmount.Text);
// ===================================== STEP 1 => Make One-Time Key from ToAddr =======================================
byte[] r = new byte[32];
using (RandomNumberGenerator rng = RandomNumberGenerator.Create())
{
rng.GetBytes(r);
}
r = "1111111111111111111111111111111111111111111111111111111111111111".HexToBytes();
Pure.Cryptography.ECC.ECPoint R = Pure.Cryptography.ECC.ECCurve.Secp256r1.G * r;
string OneTimeKey = ToAddr.GenPaymentOneTimeAddress(r);
{ // Calculate the One-Time PrivKey
StealthKeyPair ToAddrWithPriv = new StealthKeyPair(txbToPayloadPriv.Text.HexToBytes(), txbToViewPriv.Text.HexToBytes());
byte[] oneTimePrivKey = ToAddrWithPriv.GenOneTimePrivKey(R);
byte[] oneTimeOrgPubKey = ToAddr.GenPaymentPubKeyHash(r);
Pure.Cryptography.ECC.ECPoint oneTimePubKey = Pure.Cryptography.ECC.ECCurve.Secp256r1.G * oneTimePrivKey;
byte[] oneTimePub = oneTimePubKey.EncodePoint(true);
}
// ===================================== end =======================================
// ===================================== STEP 2 => Make TX =======================================
{
// Make From Address Information
byte[] from_r = new byte[32];
using (RandomNumberGenerator rng = RandomNumberGenerator.Create())
{
rng.GetBytes(from_r);
}
Pure.Cryptography.ECC.ECPoint from_R = Pure.Cryptography.ECC.ECCurve.Secp256r1.G * from_r;
string from_onetimekey = FromAddr.GenPaymentOneTimeAddress(from_r);
byte[] from_onetimePriv = FromAddr.GenOneTimePrivKey(from_R);
Fixed8 from_amount = Fixed8.One * 100;
// Make To Destination Information
// Make Signature
List <CTCommitment> inSK = new List <CTCommitment>();
List <CTKey> inPK = new List <CTKey>();
List <MixRingCTKey> inPKIndex = new List <MixRingCTKey>();
List <Pure.Cryptography.ECC.ECPoint> destinations = new List <Pure.Cryptography.ECC.ECPoint>();
List <Fixed8> amounts = new List <Fixed8>();
int mixin = 3;
byte[] out_amount = new byte[32];
byte[] out_mask = new byte[32];
for (int i = 0; i < 1; i++)
{
byte[] sk = SchnorrNonLinkable.GenerateRandomScalar(); // One-Time Key private Key
Pure.Cryptography.ECC.ECPoint pk = Pure.Cryptography.ECC.ECCurve.Secp256r1.G * sk; // One-Time Key Public Key
byte[] mask = SchnorrNonLinkable.GenerateRandomScalar();
byte[] b_amount = amount.ToBinaryFormat().ToBinary();
Pure.Cryptography.ECC.ECPoint C_i_in = RingCTSignature.GetCommitment(mask, b_amount);
out_amount = ScalarFunctions.Add(out_amount, b_amount);
out_mask = ScalarFunctions.Add(out_mask, mask);
CTKey key = new CTKey(pk, C_i_in);
MixRingCTKey mixRingKey = new MixRingCTKey(new UInt256(), 0xff, 0xff);
CTCommitment i_insk = new CTCommitment(sk, mask);
inSK.Add(i_insk);
inPK.Add(key);
inPKIndex.Add(mixRingKey);
}
Pure.Cryptography.ECC.ECPoint dest_pk = Pure.Cryptography.ECC.ECPoint.DecodePoint(ToAddr.GenPaymentPubKeyHash(r), Pure.Cryptography.ECC.ECCurve.Secp256r1);
destinations.Add(dest_pk);
amounts.Add(Fixed8.One * 100);
RingCTSignatureType sig = RingCTSignature.Generate(inSK, inPKIndex, destinations, amounts, Fixed8.Zero, mixin, Pure.Core.Blockchain.GoverningToken.Hash, Fixed8.Zero);
sig.AssetID = Blockchain.GoverningToken.Hash;
bool sig_ret = RingCTSignature.Verify(sig, Fixed8.Zero);
{
StealthKeyPair ToAddrWithPriv = new StealthKeyPair(txbToPayloadPriv.Text.HexToBytes(), txbToViewPriv.Text.HexToBytes());
try
{
//byte[] privKey = "db8df9b666a41337e1c4a7a90639a55e8d6d052ccfaca930f7af42642e6e3cde".HexToBytes();
//Fixed8 dstAmount = RingCTSignature.DecodeRct(sig, privKey, 0);
//Fixed8 dstAmount = RingCTSignature.DecodeRct(sig, ToAddrWithPriv.GenOneTimePrivKey(R), 0);
}
catch (Exception ex)
{
string str = ex.ToString();
}
}
RingConfidentialTransaction tx = new RingConfidentialTransaction(sig);
tx.Attributes = new TransactionAttribute[0];
tx.Inputs = new CoinReference[0];
tx.Outputs = new TransactionOutput[0];
tx.Scripts = new Witness[0];
tx.RHashKey = R;
byte[] byTx = tx.ToArray();
string hexByTx = "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byte[] tmpbytx = hexByTx.HexToBytes();
RingConfidentialTransaction tx1 = byTx.AsSerializable <RingConfidentialTransaction>();
RingConfidentialTransaction tx2 = tmpbytx.AsSerializable <RingConfidentialTransaction>();
// Check the dest address if my address
{
StealthKeyPair ToAddrWithPriv = new StealthKeyPair(txbToPayloadPriv.Text.HexToBytes(), txbToViewPriv.Text.HexToBytes());
ToAddrWithPriv.GetPaymentPubKeyFromR(tx1.RHashKey);
for (int i = 0; i < tx1.RingCTSig[0].outPK.Count; i++)
{
if (tx1.RingCTSig[0].outPK[i].dest.ToString() == Pure.Cryptography.ECC.ECPoint.DecodePoint(ToAddrWithPriv.GetPaymentPubKeyFromR(tx1.RHashKey), Pure.Cryptography.ECC.ECCurve.Secp256r1).ToString())
{
string myaddress = "myaddress";
}
}
}
// end
bool tx_sig_ret = RingCTSignature.Verify(tx1.RingCTSig[0], Fixed8.Zero);
}
// ===================================== STEP 2 => End =======================================
}
public RingConfidentialTransaction(RingCTSignatureType sig)
: base(TransactionType.RingConfidentialTransaction)
{
this.RingCTSig = new List <RingCTSignatureType>();
this.RingCTSig.Add(sig);
}
