/// <summary>VerifySign verify ASN.1 DER encoded signature using given public key with data</summary>
public static bool VerifySign(AccountPublicKey publicKey, byte[] sign, byte[] data)
{
var decodedSign = Asn1DecodeSign(sign);
var ecdsa = loadECDSAFromPublicKey(publicKey);
return(ecdsa.VerifyHash(data, decodedSign));
}
// Set the data path of the account address and private key
/// <summary>Set the data path of the account address and private key</summary>
/// <param name="path">the folder contains user's address and private key</param>
/// <returns>return true if set success</returns>
public bool SetAccountByPath(string path)
{
try
{
using (StreamReader sr = new StreamReader(path + "/address"))
{
var addr = sr.ReadToEnd();
this.account.Address = addr;
}
using (StreamReader sr = new StreamReader(path + "/private.key"))
{
var privkeyStr = sr.ReadToEnd();
var privkey = new AccountPrivateKey();
privkey.ParseJSON(privkeyStr);
this.account.PrivateKey = privkey;
}
using (StreamReader sr = new StreamReader(path + "/public.key"))
{
var pubkeyStr = sr.ReadToEnd();
var pubkey = new AccountPublicKey();
pubkey.ParseJSON(pubkeyStr);
this.account.PublicKey = pubkey;
}
}
catch (Exception e)
{
Console.WriteLine("Exception in SetAccountByPath, err=" + e);
return(false);
}
return(true);
}
private static ECDsa loadECDSAFromPublicKey(AccountPublicKey publicKey)
{
var param = new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
Q = new ECPoint
{
X = XConvert.GetECBytesFromBigInteger(publicKey.X),
Y = XConvert.GetECBytesFromBigInteger(publicKey.Y),
},
};
return(ECDsa.Create(param));
}
private Pb.UtxoOutput SelectUTXO(string bcname, string address, AccountPublicKey pubkey, BigInteger amount)
{
var reqData = new Pb.UtxoInput()
{
Header = GetDefaultHeader(),
Bcname = bcname,
Address = address,
TotalNeed = amount.ToString(),
NeedLock = false,
};
var res = client.SelectUTXO(reqData);
if (res.Header.Error != Pb.XChainErrorEnum.Success)
{
Console.WriteLine("Error in select UTXO, errcode=" + (int)res.Header.Error + ", logid=" + reqData.Header.Logid);
return(null);
}
return(res);
}