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.

        KeyPairGenerator aPairGen = KeyPairGenerator.getInstance(algName, "BC");
        aPairGen.initialize(spec);
        KeyPair aPair = aPairGen.generateKeyPair();


        KeyPairGenerator bPairGen = KeyPairGenerator.getInstance(algName, "BC");
        bPairGen.initialize(spec);
        KeyPair bPair = bPairGen.generateKeyPair();


        KeyPairGenerator cPairGen = KeyPairGenerator.getInstance(algName, "BC");
        cPairGen.initialize(spec);
        KeyPair cPair = cPairGen.generateKeyPair();

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        KeyPairGenerator bPairGen = KeyPairGenerator.getInstance(algName, "BC");
        bPairGen.initialize(spec);
        KeyPair bPair = bPairGen.generateKeyPair();


        KeyPairGenerator cPairGen = KeyPairGenerator.getInstance(algName, "BC");
        cPairGen.initialize(spec);
        KeyPair cPair = cPairGen.generateKeyPair();


        KeyAgreement aKeyAgree = KeyAgreement.getInstance(algName, "BC");
        aKeyAgree.init(aPair.getPrivate());

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    {
        DHParameterSpec             dhParams = new DHParameterSpec(p, g, privateValueSize);


        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");


        keyGen.initialize(dhParams);


        //
        // a side
        //
        KeyPair aKeyPair = keyGen.generateKeyPair();

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        new BouncyCastleProvider().setParameter(ConfigurableProvider.DH_DEFAULT_PARAMS, dhParams);


    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(algName, "BC");


        keyGen.initialize(dhParams.getP().bitLength());


        testTwoParty("DH", size, privateValueSize, keyGen);


        KeyPair aKeyPair = keyGen.generateKeyPair();

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        //
        // three party test
        //
        KeyPairGenerator aPairGen = KeyPairGenerator.getInstance(algName, "BC");
        aPairGen.initialize(spec);
        KeyPair aPair = aPairGen.generateKeyPair();


        KeyPairGenerator bPairGen = KeyPairGenerator.getInstance(algName, "BC");
        bPairGen.initialize(spec);
        KeyPair bPair = bPairGen.generateKeyPair();

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        KeyPairGenerator aPairGen = KeyPairGenerator.getInstance(algName, "BC");
        aPairGen.initialize(spec);
        KeyPair aPair = aPairGen.generateKeyPair();


        KeyPairGenerator bPairGen = KeyPairGenerator.getInstance(algName, "BC");
        bPairGen.initialize(spec);
        KeyPair bPair = bPairGen.generateKeyPair();


        KeyPairGenerator cPairGen = KeyPairGenerator.getInstance(algName, "BC");
        cPairGen.initialize(spec);
        KeyPair cPair = cPairGen.generateKeyPair();

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        KeyPairGenerator bPairGen = KeyPairGenerator.getInstance(algName, "BC");
        bPairGen.initialize(spec);
        KeyPair bPair = bPairGen.generateKeyPair();


        KeyPairGenerator cPairGen = KeyPairGenerator.getInstance(algName, "BC");
        cPairGen.initialize(spec);
        KeyPair cPair = cPairGen.generateKeyPair();


        KeyAgreement aKeyAgree = KeyAgreement.getInstance(algName, "BC");
        aKeyAgree.init(aPair.getPrivate());

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


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


        //
        // a side
        //
        KeyPair aKeyPair = g.generateKeyPair();

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    {
        DHParameterSpec             dhParams = new DHParameterSpec(p, g, 256);


        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");


        keyGen.initialize(dhParams);


        KeyPair kp = keyGen.generateKeyPair();


        KeyAgreement keyAgreement = KeyAgreement.getInstance("DH", "BC");

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    private void testInitialise()
        throws Exception
    {
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");


        keyGen.initialize(512);


        keyGen.generateKeyPair();


        testTwoParty("DH", 512, 0, keyGen);
    }

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