Examples with ECCurve org.bouncycastle.math.ec.ECCurve used on opensource projects

Example 11 with ECCurve

use of org.bouncycastle.math.ec.ECCurve in project robovm by robovm.

the class ECNamedCurveSpec method convertCurve.

private static EllipticCurve convertCurve(ECCurve curve, byte[] seed) {
    if (curve instanceof ECCurve.Fp) {
        return new EllipticCurve(new ECFieldFp(((ECCurve.Fp) curve).getQ()), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
    } else {
        ECCurve.F2m curveF2m = (ECCurve.F2m) curve;
        int[] ks;
        if (curveF2m.isTrinomial()) {
            ks = new int[] { curveF2m.getK1() };
            return new EllipticCurve(new ECFieldF2m(curveF2m.getM(), ks), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
        } else {
            ks = new int[] { curveF2m.getK3(), curveF2m.getK2(), curveF2m.getK1() };
            return new EllipticCurve(new ECFieldF2m(curveF2m.getM(), ks), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
        }
    }
}

Example 12 with ECCurve

use of org.bouncycastle.math.ec.ECCurve in project XobotOS by xamarin.

the class ECNamedCurveSpec method convertCurve.

private static EllipticCurve convertCurve(ECCurve curve, byte[] seed) {
    if (curve instanceof ECCurve.Fp) {
        return new EllipticCurve(new ECFieldFp(((ECCurve.Fp) curve).getQ()), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
    } else {
        ECCurve.F2m curveF2m = (ECCurve.F2m) curve;
        int[] ks;
        if (curveF2m.isTrinomial()) {
            ks = new int[] { curveF2m.getK1() };
            return new EllipticCurve(new ECFieldF2m(curveF2m.getM(), ks), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
        } else {
            ks = new int[] { curveF2m.getK3(), curveF2m.getK2(), curveF2m.getK1() };
            return new EllipticCurve(new ECFieldF2m(curveF2m.getM(), ks), curve.getA().toBigInteger(), curve.getB().toBigInteger(), seed);
        }
    }
}

Example 13 with ECCurve

use of org.bouncycastle.math.ec.ECCurve in project XobotOS by xamarin.

the class JCEECPrivateKey method getEncoded.

/**
     * Return a PKCS8 representation of the key. The sequence returned
     * represents a full PrivateKeyInfo object.
     *
     * @return a PKCS8 representation of the key.
     */
public byte[] getEncoded() {
    X962Parameters params;
    if (ecSpec instanceof ECNamedCurveSpec) {
        DERObjectIdentifier curveOid = ECUtil.getNamedCurveOid(((ECNamedCurveSpec) ecSpec).getName());
        if (// guess it's the OID
        curveOid == null) {
            curveOid = new DERObjectIdentifier(((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);
    }
    PrivateKeyInfo info;
    ECPrivateKeyStructure keyStructure;
    if (publicKey != null) {
        keyStructure = new ECPrivateKeyStructure(this.getS(), publicKey, params);
    } else {
        keyStructure = new ECPrivateKeyStructure(this.getS(), params);
    }
    // BEGIN android-removed
    // if (algorithm.equals("ECGOST3410"))
    // {
    //     info = new PrivateKeyInfo(new AlgorithmIdentifier(CryptoProObjectIdentifiers.gostR3410_2001, params.getDERObject()), keyStructure.getDERObject());
    // }
    // else
    // END android-removed
    {
        info = new PrivateKeyInfo(new AlgorithmIdentifier(X9ObjectIdentifiers.id_ecPublicKey, params.getDERObject()), keyStructure.getDERObject());
    }
    return info.getDEREncoded();
}