private static ECDomainParameters init(String name) {
// p = 2^160 - 2^31 - 1
BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF");
BigInteger a = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC");
BigInteger b = fromHex("1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45");
byte[] S = Hex.decode("1053CDE42C14D696E67687561517533BF3F83345");
BigInteger n = fromHex("0100000000000000000001F4C8F927AED3CA752257");
BigInteger h = BigInteger.valueOf(1);
ECCurve curve = new ECCurve.Fp(p, a, b);
ECPoint G =
curve.decodePoint(
Hex.decode(
"04"
+ "4A96B5688EF573284664698968C38BB913CBFC82"
+ "23A628553168947D59DCC912042351377AC5FB32"));
return new ECDomainParameters(curve, G, n, h, S, name);
}
private static ECDomainParameters init(String name) {
// p = 2^192 - 2^32 - 2^12 - 2^8 - 2^7 - 2^6 - 2^3 - 1
BigInteger p = fromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37");
BigInteger a = ECConstants.ZERO;
BigInteger b = BigInteger.valueOf(3);
byte[] S = null;
BigInteger n = fromHex("FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D");
BigInteger h = BigInteger.valueOf(1);
ECCurve curve = new ECCurve.Fp(p, a, b);
// ECPoint G = curve.decodePoint(Hex.decode("03"
// + "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"));
ECPoint G =
curve.decodePoint(
Hex.decode(
"04"
+ "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"
+ "9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D"));
return new ECDomainParameters(curve, G, n, h, S, name);
}