public static bool VerifySignature(PublicKey publicKey, string signature, string msg)
{
byte[] msgBytes = Encoding.UTF8.GetBytes(msg);
byte[] sigBytes = Convert.FromBase64String(signature);
ISigner signer = SignerFactory.Sha256withECDSA();
signer.Init(false, KeyFactory.ECPublicKeyParamsFromPublicKey(publicKey, SignerFactory.Sha256EcdsaDomain));
signer.BlockUpdate(msgBytes, 0, msgBytes.Length);
return(signer.VerifySignature(sigBytes));
}
public static byte[] SignData(PrivateKey pk, byte[] data)
{
ECPrivateKeyParameters privateKeyParams = KeyFactory.ECPrivateKeyParamsFromPrivateKey(pk, SignerFactory.Sha256EcdsaDomain);
ISigner signer = SignerFactory.Sha256withECDSA();
signer.Init(true, privateKeyParams);
signer.BlockUpdate(data, 0, data.Length);
byte[] signBytes = signer.GenerateSignature();
return(signBytes);
}