Examples of java.security.spec.ECGenParameterSpec

java.security.spec.ECGenParameterSpec
This immutable class specifies the set of parameters used for generating elliptic curve (EC) domain parameters. @see AlgorithmParameterSpec @author Valerie Peng @version 1.4, 11/17/05 @since 1.5

        private static String getCurveName(ECParameterSpec spec)
            throws GeneralSecurityException
        {
            AlgorithmParameters ap = AlgorithmParameters.getInstance("EC");
            ap.init(spec);
            ECGenParameterSpec nameSpec =
                ap.getParameterSpec(ECGenParameterSpec.class);
            if (nameSpec == null) {
                return null;
            }
            return nameSpec.getName();
        }

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        private static ECParameterSpec getECParameterSpec(String name)
            throws GeneralSecurityException
        {
            AlgorithmParameters ap = AlgorithmParameters.getInstance("EC");
            ap.init(new ECGenParameterSpec(name));
            return ap.getParameterSpec(ECParameterSpec.class);
        }

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    private void testKeyConversion()
        throws Exception
    {
        KeyPairGenerator kpGen = KeyPairGenerator.getInstance("ECDSA", "BC");


        kpGen.initialize(new ECGenParameterSpec("prime192v1"));


        KeyPair pair = kpGen.generateKeyPair();


        PublicKey pubKey = ECKeyUtil.publicToExplicitParameters(pair.getPublic(), "BC");

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    private void testKeyPairGenerationWithOIDs()
        throws Exception
    {
        KeyPairGenerator kpGen = KeyPairGenerator.getInstance("ECDSA", "BC");


        kpGen.initialize(new ECGenParameterSpec(X9ObjectIdentifiers.prime192v1.getId()));
        kpGen.initialize(new ECGenParameterSpec(TeleTrusTObjectIdentifiers.brainpoolP160r1.getId()));
        kpGen.initialize(new ECGenParameterSpec(SECObjectIdentifiers.secp128r1.getId()));


        try
        {
            kpGen.initialize(new ECGenParameterSpec("1.1"));


            fail("non-existant curve OID failed");
        }
        catch (InvalidAlgorithmParameterException e)
        {
            if (!"unknown curve OID: 1.1".equals(e.getMessage()))
            {
                fail("OID message check failed");
            }
        }


        try
        {
            kpGen.initialize(new ECGenParameterSpec("flibble"));


            fail("non-existant curve name failed");
        }
        catch (InvalidAlgorithmParameterException e)
        {

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            int             strength,
            SecureRandom    random)
        {
            this.strength = strength;
            this.random = random;
            ECGenParameterSpec ecParams = (ECGenParameterSpec)ecParameters.get(Integers.valueOf(strength));


            if (ecParams != null)
            {
                try
                {

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    public void testCurve(
        String name)
        throws Exception
    {
        ECGenParameterSpec     ecSpec = new ECGenParameterSpec(name);


        KeyPairGenerator    g = KeyPairGenerator.getInstance("ECDH", "BC");


        g.initialize(ecSpec, new SecureRandom());

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    public void testECDSA(
        String name)
        throws Exception
    {
        ECGenParameterSpec     ecSpec = new ECGenParameterSpec(name);


        KeyPairGenerator    g = KeyPairGenerator.getInstance("ECDSA", "BC");


        g.initialize(ecSpec, new SecureRandom());

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    public void testECGOST(
        String name)
        throws Exception
    {
        ECGenParameterSpec     ecSpec = new ECGenParameterSpec(name);


        KeyPairGenerator    g = KeyPairGenerator.getInstance("ECGOST3410", "BC");


        g.initialize(ecSpec, new SecureRandom());

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    public CreateInteropXMLDSig11Test() throws Exception {
        // Create KeyPairs
        try {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("EC");
            kpg.initialize(new ECGenParameterSpec("1.2.840.10045.3.1.7"));
            p256 = kpg.generateKeyPair();
            kpg.initialize(new ECGenParameterSpec("1.3.132.0.34"));
            p384 = kpg.generateKeyPair();
            kpg.initialize(new ECGenParameterSpec("1.3.132.0.35"));
            p521 = kpg.generateKeyPair();
        } catch (NoSuchAlgorithmException nsae) {
            // EC not supported on this platform
            ecSupport = false;
        }

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    public void testCurve(
        String name)
        throws Exception
    {
        ECGenParameterSpec     ecSpec = new ECGenParameterSpec(name);


        if (ecSpec == null)
        {
            fail("no curve for " + name + " found.");
        }

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