jdkkeypairgenerator.java

来自「bouncycastle 是一个JAVA安全提供者」· Java 代码 · 共 490 行 · 第 1/2 页

                SecureRandom    random)
        {
            this.strength = strength;
            this.random = random;
        }
        
        private void init(
            GOST3410ParameterSpec gParams,
            SecureRandom          random)
        {
            GOST3410PublicKeyParameterSetSpec spec = gParams.getPublicKeyParameters();
            
            param = new GOST3410KeyGenerationParameters(random, new GOST3410Parameters(spec.getP(), spec.getQ(), spec.getA()));
            
            engine.init(param);
            
            gost3410Params = gParams;
            initialised = true;
        }
        
        public void initialize(
            AlgorithmParameterSpec  params,
            SecureRandom            random)
            throws InvalidAlgorithmParameterException
        {
            if (!(params instanceof GOST3410ParameterSpec))
            {
                throw new InvalidAlgorithmParameterException("parameter object not a GOST3410ParameterSpec");
            }
            
            init((GOST3410ParameterSpec)params, random);
        }
        
        public KeyPair generateKeyPair()
        {
            if (!initialised)
            {
                init(new GOST3410ParameterSpec(CryptoProObjectIdentifiers.gostR3410_94_CryptoPro_A.getId()), new SecureRandom());
            }
            
            AsymmetricCipherKeyPair   pair = engine.generateKeyPair();
            GOST3410PublicKeyParameters  pub = (GOST3410PublicKeyParameters)pair.getPublic();
            GOST3410PrivateKeyParameters priv = (GOST3410PrivateKeyParameters)pair.getPrivate();
            
            return new KeyPair(new JDKGOST3410PublicKey(pub, gost3410Params), new JDKGOST3410PrivateKey(priv, gost3410Params));
        }
    }
    
    public static class ElGamal
        extends JDKKeyPairGenerator
    {
        ElGamalKeyGenerationParameters  param;
        ElGamalKeyPairGenerator         engine = new ElGamalKeyPairGenerator();
        int                             strength = 1024;
        int                             certainty = 20;
        SecureRandom                    random = new SecureRandom();
        boolean                         initialised = false;

        public ElGamal()
        {
            super("ElGamal");
        }

        public void initialize(
            int             strength,
            SecureRandom    random)
        {
            this.strength = strength;
            this.random = random;
        }

        public void initialize(
            AlgorithmParameterSpec  params,
            SecureRandom            random)
            throws InvalidAlgorithmParameterException
        {
            if (!(params instanceof ElGamalParameterSpec) && !(params instanceof DHParameterSpec))
            {
                throw new InvalidAlgorithmParameterException("parameter object not a DHParameterSpec or an ElGamalParameterSpec");
            }
            
            if (params instanceof ElGamalParameterSpec)
            {
                ElGamalParameterSpec     elParams = (ElGamalParameterSpec)params;

                param = new ElGamalKeyGenerationParameters(random, new ElGamalParameters(elParams.getP(), elParams.getG()));
            }
            else
            {
                DHParameterSpec     dhParams = (DHParameterSpec)params;

                param = new ElGamalKeyGenerationParameters(random, new ElGamalParameters(dhParams.getP(), dhParams.getG()));
            }

            engine.init(param);
            initialised = true;
        }

        public KeyPair generateKeyPair()
        {
            if (!initialised)
            {
                ElGamalParametersGenerator   pGen = new ElGamalParametersGenerator();

                pGen.init(strength, certainty, random);
                param = new ElGamalKeyGenerationParameters(random, pGen.generateParameters());
                engine.init(param);
                initialised = true;
            }

            AsymmetricCipherKeyPair         pair = engine.generateKeyPair();
            ElGamalPublicKeyParameters      pub = (ElGamalPublicKeyParameters)pair.getPublic();
            ElGamalPrivateKeyParameters     priv = (ElGamalPrivateKeyParameters)pair.getPrivate();

            return new KeyPair(new JCEElGamalPublicKey(pub),
                               new JCEElGamalPrivateKey(priv));
        }
    }

    public static class EC
        extends JDKKeyPairGenerator
    {
        ECKeyGenerationParameters   param;
        ECKeyPairGenerator          engine = new ECKeyPairGenerator();
        ECParameterSpec             ecParams = null;
        int                         strength = 239;
        int                         certainty = 50;
        SecureRandom                random = new SecureRandom();
        boolean                     initialised = false;
        String                      algorithm;

        static private Hashtable    ecParameters;

        static {
            ecParameters = new Hashtable();

            ecParameters.put(new Integer(192), 
                    ECNamedCurveTable.getParameterSpec("prime192v1"));
            ecParameters.put(new Integer(239), 
                    ECNamedCurveTable.getParameterSpec("prime239v1"));
            ecParameters.put(new Integer(256), 
                    ECNamedCurveTable.getParameterSpec("prime256v1"));
        }

        public EC()
        {
            super("EC");
            this.algorithm = "EC";
        }
        
        public EC(
            String  algorithm)
        {
            super(algorithm);
            this.algorithm = algorithm;
        }

        public void initialize(
            int             strength,
            SecureRandom    random)
        {
            this.strength = strength;
            this.random = random;
            this.ecParams = (ECParameterSpec)ecParameters.get(new Integer(strength));

            if (ecParams != null)
            {
                param = new ECKeyGenerationParameters(new ECDomainParameters(ecParams.getCurve(), ecParams.getG(), ecParams.getN()), random);

                engine.init(param);
                initialised = true;
            }
        }

        public void initialize(
            AlgorithmParameterSpec  params,
            SecureRandom            random)
            throws InvalidAlgorithmParameterException
        {
            if (!(params instanceof ECParameterSpec))
            {
                throw new InvalidAlgorithmParameterException("parameter object not a ECParameterSpec");
            }

            this.ecParams = (ECParameterSpec)params;

            param = new ECKeyGenerationParameters(new ECDomainParameters(ecParams.getCurve(), ecParams.getG(), ecParams.getN()), random);

            engine.init(param);
            initialised = true;
        }

        public KeyPair generateKeyPair()
        {
            if (!initialised)
            {
                throw new IllegalStateException("EC Key Pair Generator not initialised");
            }

            AsymmetricCipherKeyPair     pair = engine.generateKeyPair();
            ECPublicKeyParameters       pub = (ECPublicKeyParameters)pair.getPublic();
            ECPrivateKeyParameters      priv = (ECPrivateKeyParameters)pair.getPrivate();

            return new KeyPair(new JCEECPublicKey(algorithm, pub, ecParams),
                               new JCEECPrivateKey(algorithm, priv, ecParams));
        }
    }

    public static class ECDSA
        extends EC
    {
        public ECDSA()
        {
            super("ECDSA");
        }
    }

    public static class ECGOST3410
        extends EC
    {
        public ECGOST3410()
        {
            super("ECGOST3410");
        }
    }

    public static class ECDH
        extends EC
    {
        public ECDH()
        {
            super("ECDH");
        }
    }

    public static class ECDHC
        extends EC
    {
        public ECDHC()
        {
            super("ECDHC");
        }
    }
}