public X9Curve(
X9FieldID fieldID,
ASN1Sequence seq)
{
if (fieldID.getIdentifier().Equals(X9ObjectIdentifiers.prime_field))
{
BigInteger q = ((DERInteger)fieldID.getParameters()).getValue();
X9FieldElement x9A = new X9FieldElement(true, q, (ASN1OctetString)seq.getObjectAt(0));
X9FieldElement x9B = new X9FieldElement(true, q, (ASN1OctetString)seq.getObjectAt(1));
curve = new ECCurve.Fp(q, x9A.getValue().toBigInteger(), x9B.getValue().toBigInteger());
}
else
{
throw new Exception("not implemented");
}
if (seq.size() == 3)
{
seed = ((DERBitString)seq.getObjectAt(2)).getBytes();
}
}
public X9ECParameters(
ECCurve curve,
ECPoint g,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.g = g;
this.n = n;
this.h = h;
this.seed = seed;
if (curve is ECCurve.Fp)
{
this.fieldID = new X9FieldID(X9ObjectIdentifiers.prime_field, ((ECCurve.Fp)curve).getQ());
}
else
{
this.fieldID = new X9FieldID(X9ObjectIdentifiers.characteristic_two_field, null);
}
}