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

Example 1 with EllipticCurve

use of java.security.spec.EllipticCurve in project XobotOS by xamarin.

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) 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
    // END android-removed
    {
        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);
        //
        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();
    }
}

Example 2 with EllipticCurve

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

the class EC5Util method convertCurve.

public static EllipticCurve convertCurve(ECCurve curve, byte[] seed) {
    // so at the moment it's set to null. Should probably look at making this configurable
    if (curve instanceof ECCurve.Fp) {
        return new EllipticCurve(new ECFieldFp(((ECCurve.Fp) curve).getQ()), curve.getA().toBigInteger(), curve.getB().toBigInteger(), null);
    } 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(), null);
        } else {
            ks = new int[] { curveF2m.getK3(), curveF2m.getK2(), curveF2m.getK1() };
            return new EllipticCurve(new ECFieldF2m(curveF2m.getM(), ks), curve.getA().toBigInteger(), curve.getB().toBigInteger(), null);
        }
    }
}

Example 3 with EllipticCurve

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

the class ECPrivateKeySpecTest method setUp.

protected void setUp() throws Exception {
    super.setUp();
    ECPoint ecpoint = new ECPoint(BigInteger.valueOf(1), BigInteger.valueOf(1));
    EllipticCurve curve = new EllipticCurve(new ECFieldF2m(2), BigInteger.valueOf(1), BigInteger.valueOf(1));
    s = BigInteger.valueOf(1);
    ecparams = new ECParameterSpec(curve, ecpoint, BigInteger.valueOf(1), 1);
    ecpks = new ECPrivateKeySpec(s, ecparams);
}

Example 4 with EllipticCurve

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

the class EllipticCurveTest method testEllipticCurveECFieldBigIntegerBigInteger05.

/**
     * java/security/spec/EllipticCurve#EllipticCurve(EcField,BigInteger,BigInteger)
     */
public final void testEllipticCurveECFieldBigIntegerBigInteger05() {
    // Regression for Harmony-731
    EllipticCurve ec = new EllipticCurve(new testECField(), BigInteger.valueOf(4L), BigInteger.ONE);
    assertEquals("incorrect a", ec.getA(), BigInteger.valueOf(4L));
    assertEquals("incorrect b", ec.getB(), BigInteger.ONE);
    assertEquals("incorrect size", ec.getField().getFieldSize(), 2);
}

Example 5 with EllipticCurve

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

the class EllipticCurveTest method testEllipticCurveECFieldBigIntegerBigInteger03.

/**
     * Test #3 for <code>EllipticCurve(ECField, BigInteger, BigInteger)</code>
     * constructor<br>
     * Assertion: throws <code>IllegalArgumentException</code> if
     * <code>a</code> or <code>b</code> is not <code>null</code> and not in
     * the <code>field</code><br>
     * Test preconditions: pass <code>a</code>, <code>b</code> which are
     * not in the <code>field</code> of type <code>ECFieldFp</code><br>
     * Expected: must throw <code>IllegalArgumentException</code>
     */
public final void testEllipticCurveECFieldBigIntegerBigInteger03() {
    // test case 1 parameters set,
    // a is not in field
    ECFieldFp f = new ECFieldFp(BigInteger.valueOf(23L));
    BigInteger a = BigInteger.valueOf(24L);
    BigInteger b = BigInteger.valueOf(19L);
    // perform test case 1
    try {
        new EllipticCurve(f, a, b);
        fail("#1: Expected IAE not thrown");
    } catch (IllegalArgumentException ok) {
    }
    // test case 1.1 parameters set,
    // a is not in field
    f = new ECFieldFp(BigInteger.valueOf(23L));
    a = BigInteger.valueOf(23L);
    b = BigInteger.valueOf(19L);
    // perform test case 1.1
    try {
        new EllipticCurve(f, a, b);
        fail("#1.1: Expected IAE not thrown");
    } catch (IllegalArgumentException ok) {
    }
    // test case 2 parameters set,
    // b is not in field
    f = new ECFieldFp(BigInteger.valueOf(23L));
    a = BigInteger.valueOf(19L);
    b = BigInteger.valueOf(24L);
    // perform test case 2
    try {
        new EllipticCurve(f, a, b);
        fail("#2: Expected IAE not thrown");
    } catch (IllegalArgumentException ok) {
    }
    // test case 3 parameters set,
    // both a and b are not in field
    f = new ECFieldFp(BigInteger.valueOf(23L));
    a = BigInteger.valueOf(25L);
    b = BigInteger.valueOf(240L);
    // perform test case 3
    try {
        new EllipticCurve(f, a, b);
        fail("#3: Expected IAE not thrown");
    } catch (IllegalArgumentException ok) {
    }
}