return new DHPublicKeyParameters(y, new DHParameters(p, g, q, j, validation));
}
else if (algId.getAlgorithm().equals(PKCSObjectIdentifiers.dhKeyAgreement))
{
DHParameter params = DHParameter.getInstance(algId.getParameters());
ASN1Integer derY = (ASN1Integer)keyInfo.parsePublicKey();
BigInteger lVal = params.getL();
int l = lVal == null ? 0 : lVal.intValue();
DHParameters dhParams = new DHParameters(params.getP(), params.getG(), null, l);
return new DHPublicKeyParameters(derY.getValue(), dhParams);
}
else if (algId.getAlgorithm().equals(OIWObjectIdentifiers.elGamalAlgorithm))
{
ElGamalParameter params = new ElGamalParameter((ASN1Sequence)algId.getParameters());
ASN1Integer derY = (ASN1Integer)keyInfo.parsePublicKey();
return new ElGamalPublicKeyParameters(derY.getValue(), new ElGamalParameters(
params.getP(), params.getG()));
}
else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_dsa)
|| algId.getAlgorithm().equals(OIWObjectIdentifiers.dsaWithSHA1))
{
ASN1Integer derY = (ASN1Integer)keyInfo.parsePublicKey();
ASN1Encodable de = algId.getParameters();
DSAParameters parameters = null;
if (de != null)
{
DSAParameter params = DSAParameter.getInstance(de.toASN1Primitive());
parameters = new DSAParameters(params.getP(), params.getQ(), params.getG());
}
return new DSAPublicKeyParameters(derY.getValue(), parameters);
}
else if (algId.getAlgorithm().equals(X9ObjectIdentifiers.id_ecPublicKey))
{
X962Parameters params = new X962Parameters(
(ASN1Primitive)algId.getParameters());
X9ECParameters x9;
if (params.isNamedCurve())
{
ASN1ObjectIdentifier oid = (ASN1ObjectIdentifier)params.getParameters();
x9 = X962NamedCurves.getByOID(oid);
if (x9 == null)
{
x9 = SECNamedCurves.getByOID(oid);
if (x9 == null)
{
x9 = NISTNamedCurves.getByOID(oid);
if (x9 == null)
{
x9 = TeleTrusTNamedCurves.getByOID(oid);
}
}
}
}
else
{
x9 = X9ECParameters.getInstance(params.getParameters());
}
ASN1OctetString key = new DEROctetString(keyInfo.getPublicKeyData().getBytes());
X9ECPoint derQ = new X9ECPoint(x9.getCurve(), key);