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

Example 51 with ECPoint

use of java.security.spec.ECPoint in project spring-security-oauth by spring-projects.

the class EllipticCurveKeyHelper method createPublicKey.

static ECPublicKey createPublicKey(final BigInteger x, final BigInteger y, final String curve) {
    ECNamedCurveParameterSpec curveParameterSpec;
    if ((curveParameterSpec = ECNamedCurveTable.getParameterSpec(curve)) == null) {
        throw new IllegalArgumentException("Unsupported named curve: " + curve);
    }
    ECParameterSpec parameterSpec = new ECNamedCurveSpec(curveParameterSpec.getName(), curveParameterSpec.getCurve(), curveParameterSpec.getG(), curveParameterSpec.getN());
    ECPublicKeySpec publicKeySpec = new ECPublicKeySpec(new ECPoint(x, y), parameterSpec);
    try {
        return (ECPublicKey) KeyFactory.getInstance("EC").generatePublic(publicKeySpec);
    } catch (Exception ex) {
        throw new RuntimeException(ex);
    }
}

Example 52 with ECPoint

use of java.security.spec.ECPoint in project wycheproof by google.

the class EcdsaTest method testBasic.

/**
   * This test checks the basic functionality of ECDSA. It can also be used to generate simple test
   * vectors.
   */
public void testBasic() throws Exception {
    String algorithm = "SHA256WithECDSA";
    String hashAlgorithm = "SHA-256";
    String message = "Hello";
    String curve = "secp256r1";
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance("EC");
    ECGenParameterSpec ecSpec = new ECGenParameterSpec("secp256r1");
    keyGen.initialize(ecSpec);
    KeyPair keyPair = keyGen.generateKeyPair();
    ECPublicKey pub = (ECPublicKey) keyPair.getPublic();
    ECPrivateKey priv = (ECPrivateKey) keyPair.getPrivate();
    byte[] messageBytes = message.getBytes("UTF-8");
    Signature signer = Signature.getInstance(algorithm);
    Signature verifier = Signature.getInstance(algorithm);
    signer.initSign(priv);
    signer.update(messageBytes);
    byte[] signature = signer.sign();
    verifier.initVerify(pub);
    verifier.update(messageBytes);
    assertTrue(verifier.verify(signature));
    // Extract some parameters.
    byte[] rawHash = MessageDigest.getInstance(hashAlgorithm).digest(messageBytes);
    ECParameterSpec params = priv.getParams();
    // Print keys and signature, so that it can be used to generate new test vectors.
    System.out.println("Message:" + message);
    System.out.println("Hash:" + TestUtil.bytesToHex(rawHash));
    System.out.println("Curve:" + curve);
    System.out.println("Order:" + params.getOrder().toString());
    System.out.println("Private key:");
    System.out.println("S:" + priv.getS().toString());
    System.out.println("encoded:" + TestUtil.bytesToHex(priv.getEncoded()));
    System.out.println("Public key:");
    ECPoint w = pub.getW();
    System.out.println("X:" + w.getAffineX().toString());
    System.out.println("Y:" + w.getAffineY().toString());
    System.out.println("encoded:" + TestUtil.bytesToHex(pub.getEncoded()));
    System.out.println("Signature:" + TestUtil.bytesToHex(signature));
    System.out.println("r:" + extractR(signature).toString());
    System.out.println("s:" + extractS(signature).toString());
}

Example 53 with ECPoint

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

the class ECPublicKeySpecTest 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));
    w = new ECPoint(BigInteger.valueOf(1), BigInteger.valueOf(1));
    params = new ECParameterSpec(curve, ecpoint, BigInteger.valueOf(1), 1);
    ecpks = new ECPublicKeySpec(w, params);
}

Example 54 with ECPoint

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

the class ECParameterSpecTest method setUp.

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

Example 55 with ECPoint

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

the class ECPointTest method testEqualsObject02.

/**
     * Test #2 for <code>equals(Object other)</code> method<br>
     * Assertion: return false if this and other objects are not equal<br>
     * Test preconditions: see test comments<br>
     * Expected: all objects in this test must be not equal
     */
public final void testEqualsObject02() {
    // test case 1: must be not equal to null
    ECPoint p2 = null, p1 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ONE);
    assertFalse(p1.equals(p2));
    // test case 2: not equal objects - x
    p1 = new ECPoint(BigInteger.valueOf(-23457L), BigInteger.ONE);
    p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.valueOf(1L));
    assertFalse(p1.equals(p2) || p2.equals(p1));
    // test case 3: not equal objects - y
    p1 = new ECPoint(BigInteger.valueOf(-23457L), BigInteger.ONE);
    p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ZERO);
    assertFalse(p1.equals(p2) || p2.equals(p1));
    // test case 4: not equal - some point and POINT_INFINITY
    p1 = ECPoint.POINT_INFINITY;
    p2 = new ECPoint(BigInteger.valueOf(-23456L), BigInteger.ZERO);
    assertFalse(p1.equals(p2) || p2.equals(p1));
}