/// <summary>
/// Validate ephemeral public key signature.
/// </summary>
/// <param name="data">Data to validate.</param>
/// <param name="sign">Sign</param>
/// <param name="publicSigningKey">Public Signing key from other party.</param>
/// <returns>Is verify succeeded.</returns>
public static bool ValidateEphemeralPublicKeySignature(
byte[] data,
byte[] sign,
GXPublicKey publicSigningKey)
{
GXAsn1Integer a = new GXAsn1Integer(sign, 0, 32);
GXAsn1Integer b = new GXAsn1Integer(sign, 32, 32);
GXAsn1Sequence s = new GXAsn1Sequence();
s.Add(a);
s.Add(b);
byte[] tmp = GXAsn1Converter.ToByteArray(s);
GXEcdsa c = new GXEcdsa(publicSigningKey);
bool ret = c.Verify(sign, data);
if (!ret)
{
System.Diagnostics.Debug.WriteLine("Data:" + GXCommon.ToHex(data, true));
System.Diagnostics.Debug.WriteLine("Sign:" + GXCommon.ToHex(sign, true));
}
return(ret);
}
/// <summary>
/// Get public key as encoded format.
/// </summary>
/// <returns></returns>
public byte[] ToEncoded()
{
//Subject Public Key Info.
GXAsn1Sequence d = new GXAsn1Sequence();
GXAsn1Sequence d1 = new GXAsn1Sequence();
d1.Add(new GXAsn1ObjectIdentifier("1.2.840.10045.2.1"));
if (Scheme == Ecc.P256)
{
d1.Add(new GXAsn1ObjectIdentifier("1.2.840.10045.3.1.7"));
}
else if (Scheme == Ecc.P384)
{
d1.Add(new GXAsn1ObjectIdentifier("1.3.132.0.34"));
}
else
{
throw new Exception("Invalid ECC scheme.");
}
d.Add(d1);
d.Add(new GXAsn1BitString(RawValue, 0));
return(GXAsn1Converter.ToByteArray(d));
}
public string ToDer()
{
GXAsn1Sequence d = new GXAsn1Sequence();
d.Add((sbyte)CertificateVersion.Version2);
d.Add(RawValue);
GXAsn1Sequence d1 = new GXAsn1Sequence();
if (Scheme == Ecc.P256)
{
d1.Add(new GXAsn1ObjectIdentifier("1.2.840.10045.3.1.7"));
}
else if (Scheme == Ecc.P384)
{
d1.Add(new GXAsn1ObjectIdentifier("1.3.132.0.34"));
}
else
{
throw new Exception("Invalid ECC scheme.");
}
d.Add(d1);
d.Add(new GXAsn1BitString(GetPublicKey().RawValue));
return(GXCommon.ToBase64(GXAsn1Converter.ToByteArray(d)));
}