} // End Function SignHashInternal
// Abstract
public override bool VerifyHash(byte[] hash, byte[] signature)
{
if (hash == null)
{
throw new System.ArgumentNullException(nameof(hash));
}
if (signature == null)
{
throw new System.ArgumentNullException(nameof(signature));
}
int num = 2 * AsymmetricAlgorithmHelpers.BitsToBytes(this.KeySize);
if (signature.Length != num)
{
return(false);
}
byte[] derSignature = AsymmetricAlgorithmHelpers.ConvertIeee1363ToDer(signature);
Org.BouncyCastle.Crypto.Signers.ECDsaSigner signer =
new Org.BouncyCastle.Crypto.Signers.ECDsaSigner();
signer.Init(false, this.m_pubKey);
Org.BouncyCastle.Math.BigInteger[] bigIntegerArray = this.DerDecode(derSignature);
return(signer.VerifySignature(hash, bigIntegerArray[0], bigIntegerArray[1]));
} // End Function VerifyHash
internal Secp256k1PublicKey(Org.BouncyCastle.Asn1.X9.X9ECParameters k1Params, Org.BouncyCastle.Math.EC.ECPoint publicKey)
{
this.publicKey = publicKey;
this.signer = new Org.BouncyCastle.Crypto.Signers.ECDsaSigner(
new Org.BouncyCastle.Crypto.Signers.HMacDsaKCalculator(
new Org.BouncyCastle.Crypto.Digests.Sha256Digest()));
var parameters = new Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters(
this.publicKey,
new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(k1Params.Curve, k1Params.G, k1Params.N, k1Params.H));
signer.Init(false, parameters);
}
public Secp256k1PublicKey(ReadOnlySpan <byte> key)
{
var k1Params = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
this.publicKey = k1Params.Curve.DecodePoint(key.ToArray());
this.signer = new Org.BouncyCastle.Crypto.Signers.ECDsaSigner(
new Org.BouncyCastle.Crypto.Signers.HMacDsaKCalculator(
new Org.BouncyCastle.Crypto.Digests.Sha256Digest()));
var parameters = new Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters(
this.publicKey,
new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(k1Params.Curve, k1Params.G, k1Params.N, k1Params.H));
signer.Init(false, parameters);
}
public byte[] SignHashInternal(byte[] hash)
{
if (hash == null)
{
throw new System.ArgumentNullException(nameof(hash));
}
Org.BouncyCastle.Crypto.Signers.ECDsaSigner signer = new Org.BouncyCastle.Crypto.Signers.ECDsaSigner();
signer.Init(true, this.m_privKey);
Org.BouncyCastle.Math.BigInteger[] signature = signer.GenerateSignature(hash);
byte[] encoded = this.DerEncode(signature[0], signature[1]);
return(encoded);
} // End Function SignHashInternal
internal Secp256k1KeyPair(Org.BouncyCastle.Math.BigInteger privateKey)
{
this.privateKey = privateKey;
this.k1Params = Org.BouncyCastle.Asn1.Sec.SecNamedCurves.GetByName("secp256k1");
this.publicKey = new Secp256k1PublicKey(k1Params, k1Params.G.Multiply(privateKey));
signer = new Org.BouncyCastle.Crypto.Signers.ECDsaSigner(
new Org.BouncyCastle.Crypto.Signers.HMacDsaKCalculator(
new Org.BouncyCastle.Crypto.Digests.Sha256Digest()));
var parameters = new Org.BouncyCastle.Crypto.Parameters.ECPrivateKeyParameters(
this.privateKey,
new Org.BouncyCastle.Crypto.Parameters.ECDomainParameters(k1Params.Curve, k1Params.G, k1Params.N, k1Params.H));
signer.Init(true, parameters);
}