JCEECPublicKey(
SubjectPublicKeyInfo info)
{
if (info.getAlgorithmId().getObjectId().equals(CryptoProObjectIdentifiers.gostR3410_2001))
{
DERBitString bits = info.getPublicKeyData();
ASN1OctetString key;
this.algorithm = "ECGOST3410";
try
{
key = (ASN1OctetString) ASN1Object.fromByteArray(bits.getBytes());
}
catch (IOException ex)
{
throw new IllegalArgumentException("error recovering public key");
}
byte[] keyEnc = key.getOctets();
byte[] x = new byte[32];
byte[] y = new byte[32];
for (int i = 0; i != x.length; i++)
{
x[i] = keyEnc[32 - 1 - i];
}
for (int i = 0; i != y.length; i++)
{
y[i] = keyEnc[64 - 1 - i];
}
gostParams = new GOST3410PublicKeyAlgParameters((ASN1Sequence)info.getAlgorithmId().getParameters());
ECNamedCurveParameterSpec spec = ECGOST3410NamedCurveTable.getParameterSpec(ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()));
ECCurve curve = spec.getCurve();
EllipticCurve ellipticCurve = EC5Util.convertCurve(curve, spec.getSeed());
this.q = curve.createPoint(new BigInteger(1, x), new BigInteger(1, y), false);
ecSpec = new ECNamedCurveSpec(
ECGOST3410NamedCurves.getName(gostParams.getPublicKeyParamSet()),
ellipticCurve,
new ECPoint(
spec.getG().getX().toBigInteger(),
spec.getG().getY().toBigInteger()),
spec.getN(), spec.getH());
}
else
{
X962Parameters params = new X962Parameters((DERObject)info.getAlgorithmId().getParameters());
ECCurve curve;
EllipticCurve ellipticCurve;
if (params.isNamedCurve())
{
DERObjectIdentifier oid = (DERObjectIdentifier)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 = ProviderUtil.getEcImplicitlyCa().getCurve();
}
else
{
X9ECParameters ecP = new X9ECParameters((ASN1Sequence)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...
//