Examples with EllipticCurve java.security.spec.EllipticCurve used on opensource projects

Example 51 with EllipticCurve

use of java.security.spec.EllipticCurve 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 52 with EllipticCurve

use of java.security.spec.EllipticCurve in project robovm by robovm.

the class BCECPrivateKey method populateFromPrivKeyInfo.

private void populateFromPrivKeyInfo(PrivateKeyInfo info) throws IOException {
    X962Parameters params = X962Parameters.getInstance(info.getPrivateKeyAlgorithm().getParameters());
    if (params.isNamedCurve()) {
        ASN1ObjectIdentifier oid = ASN1ObjectIdentifier.getInstance(params.getParameters());
        X9ECParameters ecP = ECUtil.getNamedCurveByOid(oid);
        // BEGIN android-removed
        // if (ecP == null) // GOST Curve
        // {
        //     ECDomainParameters gParam = ECGOST3410NamedCurves.getByOID(oid);
        //     EllipticCurve ellipticCurve = EC5Util.convertCurve(gParam.getCurve(), gParam.getSeed());
        //
        //     ecSpec = new ECNamedCurveSpec(
        //             ECGOST3410NamedCurves.getName(oid),
        //             ellipticCurve,
        //             new ECPoint(
        //                     gParam.getG().getX().toBigInteger(),
        //                     gParam.getG().getY().toBigInteger()),
        //             gParam.getN(),
        //             gParam.getH());
        // }
        // else
        // END android-removed
        {
            EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), 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;
    } else {
        X9ECParameters ecP = X9ECParameters.getInstance(params.getParameters());
        EllipticCurve ellipticCurve = EC5Util.convertCurve(ecP.getCurve(), ecP.getSeed());
        this.ecSpec = new ECParameterSpec(ellipticCurve, new ECPoint(ecP.getG().getX().toBigInteger(), ecP.getG().getY().toBigInteger()), ecP.getN(), ecP.getH().intValue());
    }
    ASN1Encodable privKey = info.parsePrivateKey();
    if (privKey instanceof DERInteger) {
        DERInteger derD = DERInteger.getInstance(privKey);
        this.d = derD.getValue();
    } else {
        org.bouncycastle.asn1.sec.ECPrivateKey ec = org.bouncycastle.asn1.sec.ECPrivateKey.getInstance(privKey);
        this.d = ec.getKey();
        this.publicKey = ec.getPublicKey();
    }
}

Example 53 with EllipticCurve

use of java.security.spec.EllipticCurve in project robovm by robovm.

the class BCECPublicKey method populateFromPubKeyInfo.

private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) {
    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 = 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);
    //
    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) ASN1Primitive.fromByteArray(data);
            } catch (IOException ex) {
                throw new IllegalArgumentException("error recovering public key");
            }
        }
    }
    X9ECPoint derQ = new X9ECPoint(curve, key);
    this.q = derQ.getPoint();
}

Example 54 with EllipticCurve

use of java.security.spec.EllipticCurve in project robovm by robovm.

the class JCEECPublicKey method populateFromPubKeyInfo.

private void populateFromPubKeyInfo(SubjectPublicKeyInfo info) {
    // BEGIN android-removed
    // if (info.getAlgorithmId().getObjectId().equals(CryptoProObjectIdentifiers.gostR3410_2001))
    // {
    //     DERBitString bits = info.getPublicKeyData();
    //     ASN1OctetString key;
    //     this.algorithm = "ECGOST3410";
    //
    //     try
    //     {
    //         key = (ASN1OctetString) ASN1Primitive.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
    // END android-removed
    {
        X962Parameters params = new X962Parameters((ASN1Primitive) info.getAlgorithmId().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);
        //
        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) ASN1Primitive.fromByteArray(data);
                } catch (IOException ex) {
                    throw new IllegalArgumentException("error recovering public key");
                }
            }
        }
        X9ECPoint derQ = new X9ECPoint(curve, key);
        this.q = derQ.getPoint();
    }
}

Example 55 with EllipticCurve

use of java.security.spec.EllipticCurve in project robovm by robovm.

the class OpenSSLECGroupContext method getInstance.

public static OpenSSLECGroupContext getInstance(ECParameterSpec params) throws InvalidAlgorithmParameterException {
    final String curveName = params.getCurveName();
    if (curveName != null) {
        return OpenSSLECGroupContext.getCurveByName(curveName);
    }
    final EllipticCurve curve = params.getCurve();
    final ECField field = curve.getField();
    final int type;
    final BigInteger p;
    if (field instanceof ECFieldFp) {
        type = NativeCrypto.EC_CURVE_GFP;
        p = ((ECFieldFp) field).getP();
    } else if (field instanceof ECFieldF2m) {
        type = NativeCrypto.EC_CURVE_GF2M;
        p = ((ECFieldF2m) field).getReductionPolynomial();
    } else {
        throw new InvalidParameterException("unhandled field class " + field.getClass().getName());
    }
    final ECPoint generator = params.getGenerator();
    return OpenSSLECGroupContext.getInstance(type, p, curve.getA(), curve.getB(), generator.getAffineX(), generator.getAffineY(), params.getOrder(), BigInteger.valueOf(params.getCofactor()));
}