public static string GetSignature(string privateKey, string message, string AccountId)
{
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
var privateKeyBytes = Base58Encoding.DecodePrivateKey(privateKey);
//var signature = Neo.Cryptography.Crypto.Default.Sign(Encoding.UTF8.GetBytes(message), privateKeyBytes, publicKeyBytes);
//return Base58Encoding.Encode(signature);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(privateKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1);
var sigInts = sa.GenerateSignature(Encoding.ASCII.GetBytes(message));
var sh = new SignatureHolder(sigInts);
var signature = sh.ToString();
//var vrt = VerifySignature(message, AccountId, signature);
return(signature);
}
private static bool VerifySignature(string message, string AccountId, string signature)
{
try
{
var signatureBytes = Base58Encoding.Decode(signature);
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
//return Neo.Cryptography.Crypto.Default.VerifySignature(Encoding.UTF8.GetBytes(message), signatureBytes, publicKeyBytes);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(Neo.Cryptography.ECC.ECPoint.FromBytes(publicKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1));
var sh = new SignatureHolder(signature);
return(sa.VerifySignature(Encoding.ASCII.GetBytes(message), sh.R, sh.S));
}
catch (Exception ex)
{
_log.LogError("VerifySignature failed: " + ex.Message);
return(false);
}
}
private static void decodeSignatureInfo(SignatureHolder signatureHolder,
TlvDecoder decoder, bool copy)
{
int beginOffset = decoder.getOffset();
int endOffset = decoder.readNestedTlvsStart(net.named_data.jndn.encoding.tlv.Tlv.SignatureInfo);
int signatureType = (int) decoder
.readNonNegativeIntegerTlv(net.named_data.jndn.encoding.tlv.Tlv.SignatureType);
if (signatureType == net.named_data.jndn.encoding.tlv.Tlv.SignatureType_SignatureSha256WithRsa) {
signatureHolder.setSignature(new Sha256WithRsaSignature());
// Modify the holder's signature object because if we create an object
// and set it, then the holder will have to copy all the fields.
Sha256WithRsaSignature signatureInfo = (Sha256WithRsaSignature) signatureHolder
.getSignature();
decodeKeyLocator(net.named_data.jndn.encoding.tlv.Tlv.KeyLocator, signatureInfo.getKeyLocator(),
decoder, copy);
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.ValidityPeriod_ValidityPeriod, endOffset))
decodeValidityPeriod(signatureInfo.getValidityPeriod(), decoder);
} else if (signatureType == net.named_data.jndn.encoding.tlv.Tlv.SignatureType_SignatureSha256WithEcdsa) {
signatureHolder.setSignature(new Sha256WithEcdsaSignature());
Sha256WithEcdsaSignature signatureInfo_0 = (Sha256WithEcdsaSignature) signatureHolder
.getSignature();
decodeKeyLocator(net.named_data.jndn.encoding.tlv.Tlv.KeyLocator, signatureInfo_0.getKeyLocator(),
decoder, copy);
if (decoder.peekType(net.named_data.jndn.encoding.tlv.Tlv.ValidityPeriod_ValidityPeriod, endOffset))
decodeValidityPeriod(signatureInfo_0.getValidityPeriod(), decoder);
} else if (signatureType == net.named_data.jndn.encoding.tlv.Tlv.SignatureType_SignatureHmacWithSha256) {
signatureHolder.setSignature(new HmacWithSha256Signature());
HmacWithSha256Signature signatureInfo_1 = (HmacWithSha256Signature) signatureHolder
.getSignature();
decodeKeyLocator(net.named_data.jndn.encoding.tlv.Tlv.KeyLocator, signatureInfo_1.getKeyLocator(),
decoder, copy);
} else if (signatureType == net.named_data.jndn.encoding.tlv.Tlv.SignatureType_DigestSha256)
signatureHolder.setSignature(new DigestSha256Signature());
else {
signatureHolder.setSignature(new GenericSignature());
GenericSignature signatureInfo_2 = (GenericSignature) signatureHolder
.getSignature();
// Get the bytes of the SignatureInfo TLV.
signatureInfo_2.setSignatureInfoEncoding(
new Blob(decoder.getSlice(beginOffset, endOffset), copy),
signatureType);
}
decoder.finishNestedTlvs(endOffset);
}
