jceecpublickey.java

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                        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...
            //
            if (data[0] == 0x04 && data[1] == data.length - 2 
                && (data[2] == 0x02 || data[2] == 0x03))
            {
                int qLength = new X9IntegerConverter().getByteLength(curve);

                if (qLength >= data.length - 3)
                {
                    try
                    {
                        key = (ASN1OctetString) ASN1Object.fromByteArray(data);
                    }
                    catch (IOException ex)
                    {
                        throw new IllegalArgumentException("error recovering public key");
                    }
                }
            }
            X9ECPoint       derQ = new X9ECPoint(curve, key);
    
            this.q = derQ.getPoint();
        }
    }


    public String getAlgorithm()
    {
        return algorithm;
    }

    public String getFormat()
    {
        return "X.509";
    }

    public byte[] getEncoded()
    {
        ASN1Encodable        params;
        SubjectPublicKeyInfo info;

        if (algorithm.equals("ECGOST3410"))
        {
            if (gostParams != null)
            {
                params = gostParams;
            }
            else
            {
                params = new GOST3410PublicKeyAlgParameters(
                                   ECGOST3410NamedCurves.getOID(((ECNamedCurveSpec)ecSpec).getName()),
                                   CryptoProObjectIdentifiers.gostR3411_94_CryptoProParamSet);
            }

            BigInteger      bX = this.q.getX().toBigInteger();
            BigInteger      bY = this.q.getY().toBigInteger();
            byte[]          encKey = new byte[64];

            extractBytes(encKey, 0, bX);
            extractBytes(encKey, 32, bY);

            info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, params.getDERObject()), new DEROctetString(encKey));
        }
        else
        {
            if (ecSpec instanceof ECNamedCurveSpec)
            {
                DERObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec)ecSpec).getName());
                
                params = new X962Parameters(curveOid);
            }
            else if (ecSpec == null)
            {
                params = new X962Parameters(DERNull.INSTANCE);
            }
            else
            {
                ECCurve curve = EC5Util.convertCurve(ecSpec.getCurve());

                X9ECParameters ecP = new X9ECParameters(
                    curve,
                    EC5Util.convertPoint(curve, ecSpec.getGenerator(), withCompression),
                    ecSpec.getOrder(),
                    BigInteger.valueOf(ecSpec.getCofactor()),
                    ecSpec.getCurve().getSeed());

                params = new X962Parameters(ecP);
            }

            ECCurve curve = this.engineGetQ().getCurve();
            ASN1OctetString p = (ASN1OctetString)
                new X9ECPoint(curve.createPoint(this.getQ().getX().toBigInteger(), this.getQ().getY().toBigInteger(), withCompression)).getDERObject();

            info = new SubjectPublicKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), p.getOctets());
        }

        return info.getDEREncoded();
    }

    private void extractBytes(byte[] encKey, int offSet, BigInteger bI)
    {
        byte[] val = bI.toByteArray();
        if (val.length < 32)
        {
            byte[] tmp = new byte[32];
            System.arraycopy(val, 0, tmp, tmp.length - val.length, val.length);
        }

        for (int i = 0; i != 32; i++)
        {
            encKey[offSet + i] = val[val.length - 1 - i];
        }
    }

    public ECParameterSpec getParams()
    {
        return ecSpec;
    }

    public org.bouncycastle.jce.spec.ECParameterSpec getParameters()
    {
        if (ecSpec == null)     // implictlyCA
        {
            return null;
        }

        return EC5Util.convertSpec(ecSpec, withCompression);
    }

    public ECPoint getW()
    {
        return new ECPoint(q.getX().toBigInteger(), q.getY().toBigInteger());
    }

    public org.bouncycastle.math.ec.ECPoint getQ()
    {
        if (ecSpec == null)
        {
            if (q instanceof org.bouncycastle.math.ec.ECPoint.Fp)
            {
                return new org.bouncycastle.math.ec.ECPoint.Fp(null, q.getX(), q.getY());
            }
            else
            {
                return new org.bouncycastle.math.ec.ECPoint.F2m(null, q.getX(), q.getY());
            }
        }

        return q;
    }

    public org.bouncycastle.math.ec.ECPoint engineGetQ()
    {
        return q;
    }

    org.bouncycastle.jce.spec.ECParameterSpec engineGetSpec()
    {
        if (ecSpec != null)
        {
            return EC5Util.convertSpec(ecSpec, withCompression);
        }

        return ProviderUtil.getEcImplicitlyCa();
    }

    public String toString()
    {
        StringBuffer    buf = new StringBuffer();
        String          nl = System.getProperty("line.separator");

        buf.append("EC Public Key").append(nl);
        buf.append("            X: ").append(this.q.getX().toBigInteger().toString(16)).append(nl);
        buf.append("            Y: ").append(this.q.getY().toBigInteger().toString(16)).append(nl);

        return buf.toString();

    }
    
    public void setPointFormat(String style)
    {
       withCompression = !("UNCOMPRESSED".equalsIgnoreCase(style));
    }

    public boolean equals(Object o)
    {
        if (!(o instanceof JCEECPublicKey))
        {
            return false;
        }

        JCEECPublicKey other = (JCEECPublicKey)o;

        return engineGetQ().equals(other.engineGetQ()) && (engineGetSpec().equals(other.engineGetSpec()));
    }

    public int hashCode()
    {
        return engineGetQ().hashCode() ^ engineGetSpec().hashCode();
    }
}