public static DigitalSignature FromKey(byte[] privateKey, byte[] publicKey)
{
if (privateKey == null || privateKey.Length != 32)
{
return(null);
}
if (publicKey == null || publicKey.Length != 64)
{
return(null);
}
var param = new ECParameters()
{
Curve = ECCurve.CreateFromFriendlyName("secp256k1"),
D = privateKey,
Q = new ECPoint()
{
X = publicKey.Take(32).ToArray(),
Y = publicKey.Skip(32).Take(32).ToArray(),
},
};
var ds = new DigitalSignature(privateKey, publicKey);
try
{
ds.dsa = ECDsa.Create(param);
}
catch
{
return(null);
}
return(ds);
}
public static DigitalSignature Generate()
{
var dsa = ECDsa.Create("ECDsaCng");
dsa.GenerateKey(ECCurve.CreateFromFriendlyName("secp256k1"));
var param = dsa.ExportParameters(true);
var ds = new DigitalSignature(param.D, param.Q.X.Concat(param.Q.Y).ToArray());
ds.dsa = dsa;
return(ds);
}
public bool Verify()
{
try
{
if (PublicKey == null || Sign == null)
{
return(false);
}
var clone = Clone();
var json = Util.SerializeJsonBinary(clone, false);
var ds = DigitalSignature.FromKey(Util.FromBase58(PublicKey));
return(ds.Verify(json, Util.FromBase58(Sign)));
}
catch { }
return(false);
}