private void populateFromPubKeyInfo(SubjectPublicKeyInfo info)
{
if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145be) || info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
DERBitString bits = info.getPublicKeyData();
ASN1OctetString key;
this.algorithm = "DSTU4145";
try
{
key = (ASN1OctetString)ASN1Primitive.fromByteArray(bits.getBytes());
}
catch (IOException ex)
{
throw new IllegalArgumentException("error recovering public key");
}
byte[] keyEnc = key.getOctets();
if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
reverseBytes(keyEnc);
}
dstuParams = DSTU4145Params.getInstance((ASN1Sequence)info.getAlgorithm().getParameters());
//ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()));
org.bouncycastle.jce.spec.ECParameterSpec spec = null;
if (dstuParams.isNamedCurve())
{
ASN1ObjectIdentifier curveOid = dstuParams.getNamedCurve();
ECDomainParameters ecP = DSTU4145NamedCurves.getByOID(curveOid);
spec = new ECNamedCurveParameterSpec(curveOid.getId(), ecP.getCurve(), ecP.getG(), ecP.getN(), ecP.getH(), ecP.getSeed());
}
else
{
DSTU4145ECBinary binary = dstuParams.getECBinary();
byte[] b_bytes = binary.getB();
if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
reverseBytes(b_bytes);
}
DSTU4145BinaryField field = binary.getField();
ECCurve curve = new ECCurve.F2m(field.getM(), field.getK1(), field.getK2(), field.getK3(), binary.getA(), new BigInteger(1, b_bytes));
byte[] g_bytes = binary.getG();
if (info.getAlgorithm().getAlgorithm().equals(UAObjectIdentifiers.dstu4145le))
{
reverseBytes(g_bytes);
}
spec = new org.bouncycastle.jce.spec.ECParameterSpec(curve, DSTU4145PointEncoder.decodePoint(curve, g_bytes), binary.getN());
}
ECCurve curve = spec.getCurve();
EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed());
//this.q = curve.createPoint(new BigInteger(1, x), new BigInteger(1, y), false);
this.q = DSTU4145PointEncoder.decodePoint(curve, keyEnc);
if (dstuParams.isNamedCurve())
{
ecSpec = new ECNamedCurveSpec(
dstuParams.getNamedCurve().getId(),
ellipticCurve,
new ECPoint(
spec.getG().getX().toBigInteger(),
spec.getG().getY().toBigInteger()),
spec.getN(), spec.getH());
}
else
{
ecSpec = new ECParameterSpec(
ellipticCurve,
new ECPoint(
spec.getG().getX().toBigInteger(),
spec.getG().getY().toBigInteger()),
spec.getN(), spec.getH().intValue());
}
}
else
{
X962Parameters params = new X962Parameters((ASN1Primitive)info.getAlgorithm().getParameters());
ECCurve curve;
EllipticCurve ellipticCurve;
if (params.isNamedCurve())
{
ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)params.getParameters();
X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);
curve = ecP.getCurve();
ellipticCurve = EC5Util.convertCurve(curve, 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;
curve = BouncyCastleProvider.CONFIGURATION.getEcImplicitlyCa().getCurve();
}
else
{
X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters());
curve = ecP.getCurve();
ellipticCurve = EC5Util.convertCurve(curve, ecP.getSeed());
this.ecSpec = new ECParameterSpec(
ellipticCurve,
new ECPoint(
ecP.getG().getX().toBigInteger(),
ecP.getG().getY().toBigInteger()),
ecP.getN(),
ecP.getH().intValue());
}
DERBitString bits = info.getPublicKeyData();
byte[] data = bits.getBytes();
ASN1OctetString key = new DEROctetString(data);
//
// extra octet string - one of our old certs...
//
if (data[0] == 0x04 && data[1] == data.length - 2