public void Sign(IPacket packet, object args = null)
{
if (!(packet is UtxoSignedPacketBase packetBase))
{
throw new ArgumentOutOfRangeException(nameof(packet), string.Format(Resources.ERR_WRONG_PACKET_BASE_TYPE, nameof(UtxoSigningService), typeof(UtxoSignedPacketBase).FullName));
}
UtxoSignatureInput signatureInput = args as UtxoSignatureInput;
byte[][] publicKeys = signatureInput.PublicKeys;
int index = signatureInput.KeyPosition;
byte[] otsk = ConfidentialAssetsHelper.GetOTSK(signatureInput.SourceTransactionKey, _secretViewKey, _secretSpendKey);
byte[] keyImage = ConfidentialAssetsHelper.GenerateKeyImage(otsk);
packetBase.KeyImage = _identityKeyProvider.GetKey(keyImage);
byte[] msg = new byte[packet.BodyBytes.Length + keyImage.Length];
Array.Copy(packet.BodyBytes.ToArray(), 0, msg, 0, packet.BodyBytes.Length);
Array.Copy(keyImage, 0, msg, packet.BodyBytes.Length, keyImage.Length);
RingSignature[] ringSignatures = ConfidentialAssetsHelper.GenerateRingSignature(msg, keyImage, publicKeys, otsk, index);
packetBase.PublicKeys = signatureInput.PublicKeys.Select(p => _identityKeyProvider.GetKey(p)).ToArray();
packetBase.Signatures = ringSignatures;
}
public static byte[] GetUtxoConfidentialPacket(PacketType packetType, ulong syncBlockHeight, uint nonce, byte[] powHash, ushort version, ushort blockType, ulong tagId, byte[] keyImage, byte[] destinationKey, byte[] transactionPublicKey, byte[] body, byte[][] pubKeys, byte[] secretKey, int secIndex, out RingSignature[] ringSignatures)
{
byte[] bodyBytes = null;
byte[] result = null;
using (MemoryStream ms = new MemoryStream())
{
using (BinaryWriter bw = new BinaryWriter(ms))
{
bw.Write(version);
bw.Write(blockType);
bw.Write(tagId);
bw.Write(keyImage);
bw.Write(destinationKey);
bw.Write(transactionPublicKey);
bw.Write(body);
}
bodyBytes = ms.ToArray();
}
ringSignatures = ConfidentialAssetsHelper.GenerateRingSignature(bodyBytes, keyImage, pubKeys, secretKey, secIndex);
using (MemoryStream ms = new MemoryStream())
{
using (BinaryWriter bw = new BinaryWriter(ms))
{
bw.Write((ushort)packetType);
bw.Write(syncBlockHeight);
bw.Write(nonce);
bw.Write(powHash);
bw.Write(bodyBytes);
bw.Write((ushort)ringSignatures.Length);
for (int i = 0; i < pubKeys.Length; i++)
{
bw.Write(pubKeys[i]);
}
for (int i = 0; i < pubKeys.Length; i++)
{
bw.Write(ringSignatures[i].C);
bw.Write(ringSignatures[i].R);
}
}
result = ms.ToArray();
}
return(result);
}
public BlockBase CreateUtxoRegisterBlock(UtxoConfidentialBase confidentialBase, byte[] otsk, int actualAssetPos)
{
byte[] msg = ConfidentialAssetsHelper.FastHash256(confidentialBase.RawData.ToArray());
RegistryRegisterUtxoConfidentialBlock registryRegisterUtxoConfidentialBlock = new RegistryRegisterUtxoConfidentialBlock
{
SyncBlockHeight = confidentialBase.SyncBlockHeight,
Nonce = confidentialBase.Nonce,
PowHash = confidentialBase.PowHash,
ReferencedPacketType = confidentialBase.PacketType,
ReferencedBlockType = confidentialBase.BlockType,
DestinationKey = confidentialBase.DestinationKey,
KeyImage = confidentialBase.KeyImage,
ReferencedBodyHash = _hashCalculation.CalculateHash(confidentialBase.RawData),
TransactionPublicKey = confidentialBase.TransactionPublicKey,
TagId = confidentialBase.TagId,
PublicKeys = confidentialBase.PublicKeys,
Signatures = ConfidentialAssetsHelper.GenerateRingSignature(msg, confidentialBase.KeyImage.Value.ToArray(), confidentialBase.PublicKeys.Select(p => p.Value.ToArray()).ToArray(), otsk, actualAssetPos)
};
return(registryRegisterUtxoConfidentialBlock);
}
private BlockBase CreateNonQuantitativeTransitionAssetTransferBlock(Account receiver, byte[] assetId, byte[] prevTransactionKey, byte[] prevCommitment, byte[] prevDestinationKey, int ringSize, ulong tagId, out byte[] otsk, out int pos)
{
if (!_clientState.IsConfidential())
{
otsk = null;
pos = -1;
return(null);
}
byte[] otskAsset = ConfidentialAssetsHelper.GetOTSK(prevTransactionKey, _clientState.GetSecretViewKey(), _clientState.GetSecretSpendKey());
otsk = otskAsset;
byte[] keyImage = ConfidentialAssetsHelper.GenerateKeyImage(otskAsset);
byte[] secretKey = ConfidentialAssetsHelper.GetRandomSeed();
byte[] transactionKey = ConfidentialAssetsHelper.GetTrancationKey(secretKey);
byte[] destinationKey = _hashCalculation.CalculateHash(receiver.PublicKey);
byte[] blindingFactor = ConfidentialAssetsHelper.GetRandomSeed();
byte[] assetCommitment = ConfidentialAssetsHelper.GetAssetCommitment(assetId, blindingFactor);
byte[] msg = ConfidentialAssetsHelper.FastHash256(BitConverter.GetBytes(tagId), keyImage, destinationKey, transactionKey, assetCommitment);
Random random = new Random(BitConverter.ToInt32(secretKey, 0));
GetCommitmentAndProofs(prevCommitment, prevDestinationKey, ringSize, tagId, random, out int actualAssetPos, out byte[][] assetCommitments, out byte[][] assetPubs);
pos = actualAssetPos;
UtxoUnspentBlock idCardBlock = _dataAccessService.GetUtxoUnspentBlocksByTagId(_idCardTagId).First();
byte[] otskAffiliation = ConfidentialAssetsHelper.GetOTSK(idCardBlock.TransactionKey, _clientState.GetSecretViewKey(), _clientState.GetSecretSpendKey());
byte[] affiliationBlindingFactor = ConfidentialAssetsHelper.GetRandomSeed();
byte[] affiliationAssetCommitment = ConfidentialAssetsHelper.GetAssetCommitment(idCardBlock.AssetId, affiliationBlindingFactor);
GetCommitmentAndProofs(idCardBlock.Output.Commitment, idCardBlock.Output.DestinationKey, ringSize, _idCardTagId, random, out int actualAffiliationPos, out byte[][] affiliationCommitments, out byte[][] affiliationPubs);
BorromeanRingSignature borromeanRingSignature = ConfidentialAssetsHelper.GenerateBorromeanRingSignature(msg, affiliationPubs, actualAffiliationPos, otskAffiliation);
SurjectionProof assetSurjectionProof = ConfidentialAssetsHelper.CreateAssetRangeProof(assetCommitment, assetCommitments, actualAssetPos, blindingFactor);
SurjectionProof affilaitionSurjectionProof = ConfidentialAssetsHelper.CreateAssetRangeProof(affiliationAssetCommitment, affiliationCommitments, actualAffiliationPos, affiliationBlindingFactor);
List <TransactionalIncomingBlock> incomingBlocks = _dataAccessService.GetIncomingBlocksByBlockType(BlockTypes.Transaction_IssueAssets);
List <IssueAssetsBlock> issueAssetsBlocks = incomingBlocks.Where(b => b.TagId == _idCardTagId).ToList().Select(b =>
{
return((IssueAssetsBlock)_blockParsersRepositoriesRepository.GetBlockParsersRepository(PacketType.Transactional).GetInstance(b.BlockType).Parse(b.Content));
}).ToList();
List <byte[]> rawIdCardAssetIds = issueAssetsBlocks.SelectMany(b => b.IssuedAssetIds).ToList();
SurjectionProof affiliationEvidenceSurjectionProof = ConfidentialAssetsHelper.CreateNewIssuanceSurjectionProof(affiliationAssetCommitment, rawIdCardAssetIds.ToArray(), rawIdCardAssetIds.FindIndex(b => b.Equals32(idCardBlock.AssetId)), affiliationBlindingFactor);
NonQuantitativeTransitionAssetTransferBlock block = new NonQuantitativeTransitionAssetTransferBlock
{
TagId = tagId,
KeyImage = _identityKeyProvider.GetKey(keyImage),
DestinationKey = destinationKey,
TransactionPublicKey = transactionKey,
AssetCommitment = assetCommitment,
SurjectionProof = assetSurjectionProof,
AffiliationCommitment = affiliationAssetCommitment,
AffiliationPseudoKeys = affiliationPubs,
AffiliationSurjectionProof = affilaitionSurjectionProof,
AffiliationBorromeanSignature = borromeanRingSignature,
AffiliationEvidenceSurjectionProof = affiliationEvidenceSurjectionProof,
EcdhTuple = ConfidentialAssetsHelper.CreateEcdhTupleCA(blindingFactor, assetId, secretKey, receiver.PublicKey),
PublicKeys = assetPubs.Select(p => _identityKeyProvider.GetKey(p)).ToArray(),
Signatures = ConfidentialAssetsHelper.GenerateRingSignature(msg, keyImage, assetPubs, otskAsset, actualAssetPos)
};
FillSyncData(block);
FillRawData(block);
return(block);
}
