Examples of java.security.KeyPairGenerator.initialize()

java.security.KeyPairGenerator.initialize()
Initializes the key pair generator for a certain keysize using a default parameter set and the SecureRandom implementation of the highest-priority installed provider as the source of randomness. (If none of the installed providers supply an implementation of SecureRandom, a system-provided source of randomness is used.) @param keysize the keysize. This is analgorithm-specific metric, such as modulus length, specified in number of bits. @exception InvalidParameterException if the keysize is notsupported by this KeyPairGenerator object.

            }
        }


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


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

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                                curve.decodePoint(Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
                                new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307")); // n


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


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


        KeyPair     keyPair = g.generateKeyPair();


        PublicKey   pubKey = keyPair.getPublic();
        PrivateKey  privKey = keyPair.getPrivate();

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        store.load(null, null);


        KeyPairGenerator gen = KeyPairGenerator.getInstance("RSA", "BC");


        gen.initialize(1024, new SecureRandom());


        KeyPair         pair = gen.generateKeyPair();
        RSAPrivateKey   privKey = (RSAPrivateKey)pair.getPrivate();
        RSAPublicKey    pubKey = (RSAPublicKey)pair.getPublic();
        BigInteger      modulus = privKey.getModulus();

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        ConfigurableProvider config = (ConfigurableProvider)Security.getProvider("BC");


        config.setParameter(ConfigurableProvider.EC_IMPLICITLY_CA, ecSpec);


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


        KeyPair p = g.generateKeyPair();


        ECPrivateKey sKey = (ECPrivateKey)p.getPrivate();
        ECPublicKey vKey = (ECPublicKey)p.getPublic();

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        ConfigurableProvider config = (ConfigurableProvider)Security.getProvider("BC");


        config.setParameter(ConfigurableProvider.EC_IMPLICITLY_CA, ecSpec);


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


        KeyPair p = g.generateKeyPair();


        ECPrivateKey sKey = (ECPrivateKey)p.getPrivate();
        ECPublicKey vKey = (ECPublicKey)p.getPublic();

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        ConfigurableProvider config = (ConfigurableProvider)Security.getProvider("BC");


        config.setParameter(ConfigurableProvider.EC_IMPLICITLY_CA, ecSpec);


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


        KeyPair p = g.generateKeyPair();


        ECPrivateKey sKey = (ECPrivateKey)p.getPrivate();
        ECPublicKey vKey = (ECPublicKey)p.getPublic();

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        ConfigurableProvider config = (ConfigurableProvider)Security.getProvider("BC");


        config.setParameter(ConfigurableProvider.THREAD_LOCAL_EC_IMPLICITLY_CA, ecSpec);


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


        KeyPair p = g.generateKeyPair();


        ECPrivateKey sKey = (ECPrivateKey)p.getPrivate();
        ECPublicKey vKey = (ECPublicKey)p.getPublic();

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                curve,
                ECPointUtil.decodePoint(curve, Hex.decode("020ffa963cdca8816ccc33b8642bedf905c3d358573d3f27fbbd3b3cb9aaaf")), // G
                new BigInteger("883423532389192164791648750360308884807550341691627752275345424702807307"), // n
                1); // h


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


        //
        // U side
        //
        KeyPair U1 = g.generateKeyPair();

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        SecureRandom k = new FixedSecureRandom(Hex.decode("00137449348C1249971759D99C252FFE1E14D8B31F00"));
        SecureRandom keyRand = new FixedSecureRandom(Hex.decode("0000955CD7E344303D1034E66933DC21C8044D42ADB8"));
        
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSTU4145", "BC");
        keyGen.initialize(spec, keyRand);
        KeyPair pair = keyGen.generateKeyPair();
        
        Signature sgr = Signature.getInstance("DSTU4145", "BC");


        sgr.initSign(pair.getPrivate(), k);

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        KeyPair kp = null;
        boolean success = false;
        while (!success)
        {
            KeyPairGenerator kpg = KeyPairGenerator.getInstance("ECDSA");
            kpg.initialize(new ECParameterSpec(params.getCurve(),
                    params.getG(), params.getN(), params.getH(), params
                            .getSeed()));
            kp = kpg.generateKeyPair();
            // The very old Problem... we need a certificate chain to
            // save a private key...

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