public static byte[] CalculateSignature(ECPrivateKey signingKey, byte[] message)
{
if (signingKey.GetKeyType() == DJB_TYPE)
{
return(Curve25519.GetInstance(Curve25519ProviderType.BEST).CalculateSignature(((DjbECPrivateKey)signingKey).GetPrivateKey(), message));
}
else
{
throw new InvalidKeyException("Unknown type: " + signingKey.GetKeyType());
}
}
public static byte[] CalculateAgreement(ECPublicKey publicKey, ECPrivateKey privateKey)
{
if (publicKey.GetKeyType() != privateKey.GetKeyType())
{
throw new InvalidKeyException("Public and private keys must be of the same type!");
}
if (publicKey.GetKeyType() == DJB_TYPE)
{
return(Curve25519.GetInstance(Curve25519ProviderType.BEST)
.CalculateAgreement(((DjbECPublicKey)publicKey).GetPublicKey(),
((DjbECPrivateKey)privateKey).GetPrivateKey()));
}
else
{
throw new InvalidKeyException("Unknown type: " + publicKey.GetKeyType());
}
}