public override KeyValuePair <bool, byte[]> Execute(byte[] data)
{
byte[] h = new byte[32];
byte[] v = new byte[32];
byte[] r = new byte[32];
byte[] s = new byte[32];
DataWord out_val = null;
try
{
Array.Copy(data, 0, h, 0, 32);
Array.Copy(data, 32, v, 0, 32);
Array.Copy(data, 64, r, 0, 32);
int length = data.Length < 128 ? data.Length - 96 : 32;
Array.Copy(data, 96, s, 0, length);
ECDSASignature signature = ECDSASignature.FromComponents(r, s, v[31]);
if (ValidateV(v) && signature.IsValidComponents)
{
out_val = new DataWord(ECKey.SignatureToAddress(h, signature));
}
}
catch
{
}
if (out_val == null)
{
return(new KeyValuePair <bool, byte[]>(true, new byte[0]));
}
else
{
return(new KeyValuePair <bool, byte[]>(true, out_val.Data));
}
}
public bool ValidateSignature(DatabaseManager db_manager)
{
try
{
ECDSASignature signature = ECDSASignature.ExtractECDSASignature(this.block.BlockHeader.WitnessSignature.ToByteArray());
byte[] signature_address = ECKey.SignatureToAddress(GetRawHash().Hash, signature);
byte[] witness_address = this.block.BlockHeader.RawData.WitnessAddress.ToByteArray();
if (db_manager.DynamicProperties.GetAllowMultiSign() != 1)
{
return(signature_address.SequenceEqual(witness_address));
}
else
{
byte[] witness_permission_address = db_manager.Account.Get(witness_address)?.GetWitnessPermissionAddress();
return(signature_address.SequenceEqual(witness_permission_address));
}
}
catch (System.Exception e)
{
throw new ValidateSignatureException(e.Message);
}
}
public static TransactionApprovedList GetTransactionApprovedList(Transaction transaction)
{
TransactionExtention transaction_extention = new TransactionExtention()
{
Transaction = transaction,
Txid = ByteString.CopyFrom(SHA256Hash.ToHash(transaction.RawData.ToByteArray())),
Result = new Return()
{
Result = true,
Code = Return.Types.response_code.Success
}
};
TransactionApprovedList approved = new TransactionApprovedList()
{
Transaction = transaction_extention
};
try
{
Contract contract = transaction.RawData.Contract[0];
byte[] owner_address = TransactionCapsule.GetOwner(contract);
AccountCapsule account = Manager.Instance.DBManager.Account.Get(owner_address);
if (account == null)
{
throw new PermissionException("Account is not exist.");
}
if (transaction.Signature.Count > 0)
{
byte[] hash = SHA256Hash.ToHash(transaction.RawData.ToByteArray());
foreach (var signature in transaction.Signature)
{
if (signature.Count() < 65)
{
throw new SignatureFormatException("Signature size is " + signature.Count());
}
byte[] signature_address = ECKey.SignatureToAddress(hash, ECDSASignature.ExtractECDSASignature(signature.ToByteArray()));
approved.ApprovedList.Add(ByteString.CopyFrom(signature_address));
}
}
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.Success
};
}
catch (SignatureFormatException e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.SignatureFormatError,
Message = e.Message
};
}
catch (SignatureException e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.ComputeAddressError,
Message = e.Message
};
}
catch (System.Exception e)
{
approved.Result = new TransactionApprovedList.Types.Result()
{
Code = TransactionApprovedList.Types.Result.Types.response_code.OtherError,
Message = e.Message
};
}
return(approved);
}