private void populateFromPrivKeyInfo(PrivateKeyInfo info) { X962Parameters params = new X962Parameters((DERObject) info.getAlgorithmId().getParameters()); if (params.isNamedCurve()) { DERObjectIdentifier oid = (DERObjectIdentifier) params.getParameters(); X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid); if (ecP == null) // GOST Curve { ECDomainParameters gParam = ECGOST3410NamedCurves.getByOID(oid); EllipticCurve ellipticCurve = EC5Util.convertCurve(gParam.getCurve(), gParam.getSeed()); ecSpec = new ECNamedCurveSpec( ECGOST3410NamedCurves.getName(oid), ellipticCurve, new ECPoint( gParam.getG().getX().toBigInteger(), gParam.getG().getY().toBigInteger()), gParam.getN(), gParam.getH()); } else { EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed()); ecSpec = new ECNamedCurveSpec( ECUtil.getCurveName(oid), ellipticCurve, new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()), ecP.getN(), ecP.getH()); } } else if (params.isImplicitlyCA()) { ecSpec = null; } else { X9ECParameters ecP = new X9ECParameters((ASN1Sequence) params.getParameters()); EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed()); this.ecSpec = new ECParameterSpec( ellipticCurve, new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()), ecP.getN(), ecP.getH().intValue()); } if (info.getPrivateKey() instanceof DERInteger) { DERInteger derD = (DERInteger) info.getPrivateKey(); this.d = derD.getValue(); } else { ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence) info.getPrivateKey()); this.d = ec.getKey(); this.publicKey = ec.getPublicKey(); } }