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

Example 11 with EllipticCurve

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

the class EllipticCurveTest method testEqualsObject01.

/**
     * Test #1 for <code>equals(Object other)</code> method<br>
     * Assertion: return true if this and other objects are equal<br>
     * Test preconditions: see test comments<br>
     * Expected: all objects in this test must be equal
     */
public final void testEqualsObject01() {
    // test case 1: must be equal to itself
    EllipticCurve c2 = null, c1 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L));
    assertTrue(c1.equals(c1));
    // test case 2: equal objects
    c1 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L));
    c2 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.valueOf(1L), BigInteger.valueOf(19L));
    assertTrue(c1.equals(c2) && c2.equals(c1));
    // test case 3: equal objects with seed not null
    c1 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L), new byte[24]);
    c2 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.valueOf(1L), BigInteger.valueOf(19L), new byte[24]);
    assertTrue(c1.equals(c2) && c2.equals(c1));
    // test case 4: equal object and subclass object
    c1 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L), new byte[24]);
    MyEllipticCurve c3 = new MyEllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L), new byte[24]);
    assertTrue(c1.equals(c3) && c3.equals(c1));
    // test case 5: equal objects
    c1 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.ONE, BigInteger.valueOf(19L));
    c2 = new EllipticCurve(new ECFieldFp(BigInteger.valueOf(23L)), BigInteger.valueOf(1L), BigInteger.valueOf(19L), null);
    assertTrue(c1.equals(c2) && c2.equals(c1));
}

Example 12 with EllipticCurve

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

the class EllipticCurveTest method testGetField.

/**
     * Test for <code>getField()</code> method<br>
     * Assertion: returns <code>field</code><br>
     * Test preconditions: <code>ECFieldF2m</code> instance
     * created using valid parameters<br>
     * Expected: must return <code>field</code> which is equal
     * to the one passed to the constructor; (both must refer
     * the same object)
     */
public final void testGetField() {
    ECFieldF2m f = new ECFieldF2m(5);
    BigInteger a = BigInteger.valueOf(5L);
    BigInteger b = BigInteger.valueOf(19L);
    EllipticCurve c = new EllipticCurve(f, a, b);
    assertEquals(f, c.getField());
    assertSame(f, c.getField());
}

Example 13 with EllipticCurve

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

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 14 with EllipticCurve

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

the class JCEECPrivateKey method populateFromPrivKeyInfo.

private void populateFromPrivKeyInfo(PrivateKeyInfo info) throws IOException {
    X962Parameters params = new X962Parameters((ASN1Primitive) 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 {
        ECPrivateKeyStructure ec = new ECPrivateKeyStructure((ASN1Sequence) privKey);
        this.d = ec.getKey();
        this.publicKey = ec.getPublicKey();
    }
}

Example 15 with EllipticCurve

use of java.security.spec.EllipticCurve in project cxf by apache.

the class JweUtils method getECDHKey.

public static byte[] getECDHKey(ECPrivateKey privateKey, ECPublicKey peerPublicKey, byte[] partyUInfo, byte[] partyVInfo, String algoName, int algoKeyBitLen) {
    // Step 1: Verify public key is not point at infinity.
    if (ECPoint.POINT_INFINITY.equals(peerPublicKey.getW())) {
        throw new JweException(JweException.Error.KEY_ENCRYPTION_FAILURE);
    }
    EllipticCurve curve = peerPublicKey.getParams().getCurve();
    final BigInteger x = peerPublicKey.getW().getAffineX();
    final BigInteger y = peerPublicKey.getW().getAffineY();
    final BigInteger p = ((ECFieldFp) curve.getField()).getP();
    // Step 2: Verify x and y are in range [0,p-1]
    if (x.compareTo(BigInteger.ZERO) < 0 || x.compareTo(p) >= 0 || y.compareTo(BigInteger.ZERO) < 0 || y.compareTo(p) >= 0) {
        throw new JweException(JweException.Error.KEY_ENCRYPTION_FAILURE);
    }
    final BigInteger a = curve.getA();
    final BigInteger b = curve.getB();
    // Step 3: Verify that y^2 == x^3 + ax + b (mod p)
    final BigInteger ySquared = y.modPow(BigInteger.valueOf(2), p);
    final BigInteger xCubedPlusAXPlusB = x.modPow(BigInteger.valueOf(3), p).add(a.multiply(x)).add(b).mod(p);
    if (!ySquared.equals(xCubedPlusAXPlusB)) {
        throw new JweException(JweException.Error.KEY_ENCRYPTION_FAILURE);
    }
    // All the NIST curves used here define h = 1.
    if (peerPublicKey.getParams().getCofactor() != 1) {
        throw new JweException(JweException.Error.KEY_ENCRYPTION_FAILURE);
    }
    // Finally calculate the derived key
    byte[] keyZ = generateKeyZ(privateKey, peerPublicKey);
    return calculateDerivedKey(keyZ, algoName, partyUInfo, partyVInfo, algoKeyBitLen);
}