public static bool VerifySignature(byte[] message, byte[] signature, byte[] pubkey)
{
//unity dotnet不完整，不能用dotnet自带的ecdsa
var PublicKey = ThinNeo.Cryptography.ECC.ECPoint.DecodePoint(pubkey, ThinNeo.Cryptography.ECC.ECCurve.Secp256r1);
var ecdsa = new ThinNeo.Cryptography.ECC.ECDsa(PublicKey);
var b1 = signature.Take(32).Reverse().Concat(new byte[] { 0x00 }).ToArray();
var b2 = signature.Skip(32).Reverse().Concat(new byte[] { 0x00 }).ToArray();
var num1 = new BigInteger(b1);
var num2 = new BigInteger(b2);
var hash = sha256.ComputeHash(message);
return(ecdsa.VerifySignature(hash, num1, num2));
//var PublicKey = ThinNeo.Cryptography.ECC.ECPoint.DecodePoint(pubkey, ThinNeo.Cryptography.ECC.ECCurve.Secp256r1);
//var usepk = PublicKey.EncodePoint(false).Skip(1).ToArray();
////byte[] first = { 0x45, 0x43, 0x53, 0x31, 0x20, 0x00, 0x00, 0x00 };
////usepk = first.Concat(usepk).ToArray();
////using (System.Security.Cryptography.CngKey key = System.Security.Cryptography.CngKey.Import(usepk, System.Security.Cryptography.CngKeyBlobFormat.EccPublicBlob))
////using (System.Security.Cryptography.ECDsaCng ecdsa = new System.Security.Cryptography.ECDsaCng(key))
//using (var ecdsa = System.Security.Cryptography.ECDsa.Create(new System.Security.Cryptography.ECParameters
//{
// Curve = System.Security.Cryptography.ECCurve.NamedCurves.nistP256,
// Q = new System.Security.Cryptography.ECPoint
// {
// X = usepk.Take(32).ToArray(),
// Y = usepk.Skip(32).ToArray()
// }
//}))
//{
// var hash = sha256.ComputeHash(message);
// return ecdsa.VerifyHash(hash, signature);
//}
}
public static byte[] Sign(byte[] message, byte[] prikey)
{
var Secp256r1_G = Helper.HexString2Bytes("04" + "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296" + "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5");
var PublicKey = ThinNeo.Cryptography.ECC.ECCurve.Secp256r1.G * prikey;
var pubkey = PublicKey.EncodePoint(false).Skip(1).ToArray();
var ecdsa = new ThinNeo.Cryptography.ECC.ECDsa(prikey, ThinNeo.Cryptography.ECC.ECCurve.Secp256r1);
var hash = sha256.ComputeHash(message);
var result = ecdsa.GenerateSignature(hash);
var data1 = result[0].ToByteArray();
if (data1.Length > 32)
{
data1 = data1.Take(32).ToArray();
}
var data2 = result[1].ToByteArray();
if (data2.Length > 32)
{
data2 = data2.Take(32).ToArray();
}
data1 = data1.Reverse().ToArray();
data2 = data2.Reverse().ToArray();
byte[] newdata = new byte[64];
Array.Copy(data1, 0, newdata, 32 - data1.Length, data1.Length);
Array.Copy(data2, 0, newdata, 64 - data2.Length, data2.Length);
return(newdata);// data1.Concat(data2).ToArray();
}
public static byte[] Sign(byte[] message, byte[] prikey)
{
var Secp256r1_G = Helper.HexString2Bytes("04" + "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296" + "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5");
var PublicKey = ThinNeo.Cryptography.ECC.ECCurve.Secp256r1.G * prikey;
var pubkey = PublicKey.EncodePoint(false).Skip(1).ToArray();
var ecdsa = new ThinNeo.Cryptography.ECC.ECDsa(prikey, ThinNeo.Cryptography.ECC.ECCurve.Secp256r1);
System.Security.Cryptography.SHA256 sha256 = getSha256();
var hash = sha256.ComputeHash(message);
var result = ecdsa.GenerateSignature(hash);
var data1 = result[0].ToByteArray();
if (data1.Length > 32)
{
data1 = data1.Take(32).ToArray();
}
var data2 = result[1].ToByteArray();
if (data2.Length > 32)
{
data2 = data2.Take(32).ToArray();
}
data1 = data1.Reverse().ToArray();
data2 = data2.Reverse().ToArray();
byte[] newdata = new byte[64];
Array.Copy(data1, 0, newdata, 32 - data1.Length, data1.Length);
Array.Copy(data2, 0, newdata, 64 - data2.Length, data2.Length);
return(newdata);// data1.Concat(data2).ToArray();
//#if NET461
//const int ECDSA_PRIVATE_P256_MAGIC = 0x32534345;
//byte[] first = { 0x45, 0x43, 0x53, 0x32, 0x20, 0x00, 0x00, 0x00 };
//prikey = first.Concat(pubkey).Concat(prikey).ToArray();
//using (System.Security.Cryptography.CngKey key = System.Security.Cryptography.CngKey.Import(prikey, System.Security.Cryptography.CngKeyBlobFormat.EccPrivateBlob))
//using (System.Security.Cryptography.ECDsaCng ecdsa = new System.Security.Cryptography.ECDsaCng(key))
//using (var ecdsa = System.Security.Cryptography.ECDsa.Create(new System.Security.Cryptography.ECParameters
//{
// Curve = System.Security.Cryptography.ECCurve.NamedCurves.nistP256,
// D = prikey,
// Q = new System.Security.Cryptography.ECPoint
// {
// X = pubkey.Take(32).ToArray(),
// Y = pubkey.Skip(32).ToArray()
// }
//}))
//{
// var hash = sha256.ComputeHash(message);
// return ecdsa.SignHash(hash);
//}
}
public static bool VerifySignature(byte[] message, byte[] signature, byte[] pubkey)
{
//unity dotnet不完整，不能用dotnet自带的ecdsa
var PublicKey = ThinNeo.Cryptography.ECC.ECPoint.DecodePoint(pubkey, ThinNeo.Cryptography.ECC.ECCurve.Secp256r1);
var ecdsa = new ThinNeo.Cryptography.ECC.ECDsa(PublicKey);
var b1 = signature.Take(32).Reverse().Concat(new byte[] { 0x00 }).ToArray();
var b2 = signature.Skip(32).Reverse().Concat(new byte[] { 0x00 }).ToArray();
var num1 = new BigInteger(b1);
var num2 = new BigInteger(b2);
var hash = sha256.ComputeHash(message);
return(ecdsa.VerifySignature(hash, num1, num2));
}
