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.getInstance("RSA", "BC");


        //
        // 768 bit RSA with e = 2^16-1
        //
        keyPairGen.initialize(
            new RSAKeyGenParameterSpec(768,
            BigInteger.valueOf(65537)),
            new SecureRandom());


        KeyPair kp = keyPairGen.generateKeyPair();

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//                }


        GOST3410ParameterSpec gost3410P = new GOST3410ParameterSpec(CryptoProObjectIdentifiers.gostR3410_94_CryptoPro_B.getId());


        KeyPairGenerator    g = KeyPairGenerator.getInstance("GOST3410", "BC");
        g.initialize(gost3410P, new SecureRandom());
        KeyPair p = g.generateKeyPair();


        PrivateKey  sKey = p.getPrivate();
        PublicKey   vKey = p.getPublic();

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        Signature             s = Signature.getInstance("GOST3410", "BC");
        KeyPairGenerator      g = KeyPairGenerator.getInstance("GOST3410", "BC");
        byte[]                data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
        GOST3410ParameterSpec gost3410P = new GOST3410ParameterSpec(CryptoProObjectIdentifiers.gostR3410_94_CryptoPro_A.getId());


        g.initialize(gost3410P, new SecureRandom());


        KeyPair p = g.generateKeyPair();


        PrivateKey  sKey = p.getPrivate();
        PublicKey   vKey = p.getPublic();

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//                    new ECPoint.Fp(curve,
//                                   new ECFieldElement.Fp(mod_p,new BigInteger("2")), // x
//                                   new ECFieldElement.Fp(mod_p,new BigInteger("4018974056539037503335449422937059775635739389905545080690979365213431566280"))), // y
//                    new BigInteger("57896044618658097711785492504343953927082934583725450622380973592137631069619")); // q


        g.initialize(new ECNamedCurveGenParameterSpec("GostR3410-2001-CryptoPro-A"), new SecureRandom());


        p = g.generateKeyPair();


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

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        IESParameterSpec params = new IESParameterSpec(derivation,encoding,128);


        // Testing DHIES with default prime in streaming mode
        KeyPairGenerator    g = KeyPairGenerator.getInstance("DH", "BC");


        g.initialize(param);


        doTest("DHIES with default", g, "DHIES", params);
        
        // Testing DHIES with 512-bit prime in streaming mode
        g.initialize(512, new SecureRandom());

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        g.initialize(param);


        doTest("DHIES with default", g, "DHIES", params);
        
        // Testing DHIES with 512-bit prime in streaming mode
        g.initialize(512, new SecureRandom());
        doTest("DHIES with 512-bit", g, "DHIES", params);


        // Testing ECIES with 1024-bit prime in streaming mode 
        g.initialize(1024, new SecureRandom());
        doTest("DHIES with 1024-bit", g, "DHIES", params);

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        // Testing DHIES with 512-bit prime in streaming mode
        g.initialize(512, new SecureRandom());
        doTest("DHIES with 512-bit", g, "DHIES", params);


        // Testing ECIES with 1024-bit prime in streaming mode 
        g.initialize(1024, new SecureRandom());
        doTest("DHIES with 1024-bit", g, "DHIES", params);


        c1 = new IESCipher(new IESEngine(new DHBasicAgreement(), 
                new KDF2BytesGenerator(new SHA1Digest()),
                new HMac(new SHA1Digest()),

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        // Testing DHIES with default prime using DESEDE
        g = KeyPairGenerator.getInstance("DH", "BC");
        doTest("DHIESwithDES default", g, "DHIESwithDESEDE", params);
        
        // Testing DHIES with 512-bit prime using DESEDE
        g.initialize(512, new SecureRandom());
        doTest("DHIESwithDES 512-bit", g, "DHIESwithDESEDE", params);
        
        // Testing DHIES with 1024-bit prime using DESEDE
        g.initialize(1024, new SecureRandom());
        doTest("DHIESwithDES 1024-bit", g, "DHIESwithDESEDE", params);

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        // Testing DHIES with 512-bit prime using DESEDE
        g.initialize(512, new SecureRandom());
        doTest("DHIESwithDES 512-bit", g, "DHIESwithDESEDE", params);
        
        // Testing DHIES with 1024-bit prime using DESEDE
        g.initialize(1024, new SecureRandom());
        doTest("DHIESwithDES 1024-bit", g, "DHIESwithDESEDE", params);


        g = KeyPairGenerator.getInstance("DH", "BC");
        g.initialize(param);

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        // Testing DHIES with 1024-bit prime using DESEDE
        g.initialize(1024, new SecureRandom());
        doTest("DHIESwithDES 1024-bit", g, "DHIESwithDESEDE", params);


        g = KeyPairGenerator.getInstance("DH", "BC");
        g.initialize(param);


        c1 = new IESCipher.IESwithAES();
        c2 = new IESCipher.IESwithAES();
        params = new IESParameterSpec(derivation, encoding, 128, 128);

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