Package javax.crypto.spec

Examples of javax.crypto.spec.DHParameterSpec

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                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(), dhParams.getL()));
            }

            engine.init(param);
            initialised = true;
        }
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        {
            if (!(params instanceof DHParameterSpec))
            {
                throw new InvalidAlgorithmParameterException("DHKeyAgreement only accepts DHParameterSpec");
            }
            DHParameterSpec p = (DHParameterSpec)params;

            this.p = p.getP();
            this.g = p.getG();
        }
        else
        {
            this.p = privKey.getParams().getP();
            this.g = privKey.getParams().getG();
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        int         privateValueSize,
        BigInteger  g,
        BigInteger  p)
        throws Exception
    {
        DHParameterSpec             dhParams = new DHParameterSpec(p, g, privateValueSize);

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

        keyGen.initialize(dhParams);

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

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

        checkKeySize(privateValueSize, aKeyPair);

        aKeyAgree.init(aKeyPair.getPrivate());

        //
        // b side
        //
        KeyPair bKeyPair = keyGen.generateKeyPair();

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

        checkKeySize(privateValueSize, bKeyPair);

        bKeyAgree.init(bKeyPair.getPrivate());

        //
        // agreement
        //
        aKeyAgree.doPhase(bKeyPair.getPublic(), true);
        bKeyAgree.doPhase(aKeyPair.getPublic(), true);

        BigInteger  k1 = new BigInteger(aKeyAgree.generateSecret());
        BigInteger  k2 = new BigInteger(bKeyAgree.generateSecret());

        if (!k1.equals(k2))
        {
            fail(size + " bit 2-way test failed");
        }

        //
        // public key encoding test
        //
        byte[]              pubEnc = aKeyPair.getPublic().getEncoded();
        KeyFactory          keyFac = KeyFactory.getInstance("DH", "BC");
        X509EncodedKeySpec  pubX509 = new X509EncodedKeySpec(pubEnc);
        DHPublicKey         pubKey = (DHPublicKey)keyFac.generatePublic(pubX509);
        DHParameterSpec     spec = pubKey.getParams();

        if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
        {
            fail(size + " bit public key encoding/decoding test failed on parameters");
        }

        if (!((DHPublicKey)aKeyPair.getPublic()).getY().equals(pubKey.getY()))
        {
            fail(size + " bit public key encoding/decoding test failed on y value");
        }

        //
        // public key serialisation test
        //
        ByteArrayOutputStream   bOut = new ByteArrayOutputStream();
        ObjectOutputStream      oOut = new ObjectOutputStream(bOut);

        oOut.writeObject(aKeyPair.getPublic());

        ByteArrayInputStream   bIn = new ByteArrayInputStream(bOut.toByteArray());
        ObjectInputStream      oIn = new ObjectInputStream(bIn);

        pubKey = (DHPublicKey)oIn.readObject();
        spec = pubKey.getParams();

        if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
        {
            fail(size + " bit public key serialisation test failed on parameters");
        }

        if (!((DHPublicKey)aKeyPair.getPublic()).getY().equals(pubKey.getY()))
        {
            fail(size + " bit public key serialisation test failed on y value");
        }

        //
        // private key encoding test
        //
        byte[]              privEnc = aKeyPair.getPrivate().getEncoded();
        PKCS8EncodedKeySpec privPKCS8 = new PKCS8EncodedKeySpec(privEnc);
        DHPrivateKey        privKey = (DHPrivateKey)keyFac.generatePrivate(privPKCS8);

        spec = privKey.getParams();

        if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
        {
            fail(size + " bit private key encoding/decoding test failed on parameters");
        }

        if (!((DHPrivateKey)aKeyPair.getPrivate()).getX().equals(privKey.getX()))
        {
            fail(size + " bit private key encoding/decoding test failed on y value");
        }

        //
        // private key serialisation test
        //
        bOut = new ByteArrayOutputStream();
        oOut = new ObjectOutputStream(bOut);

        oOut.writeObject(aKeyPair.getPrivate());

        bIn = new ByteArrayInputStream(bOut.toByteArray());
        oIn = new ObjectInputStream(bIn);

        privKey = (DHPrivateKey)oIn.readObject();
        spec = privKey.getParams();

        if (!spec.getG().equals(dhParams.getG()) || !spec.getP().equals(dhParams.getP()))
        {
            fail(size + " bit private key serialisation test failed on parameters");
        }

        if (!((DHPrivateKey)aKeyPair.getPrivate()).getX().equals(privKey.getX()))
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        int         privateValueSize,
        BigInteger  g,
        BigInteger  p)
        throws Exception
    {
        DHParameterSpec             dhParams = new DHParameterSpec(p, g, privateValueSize);

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

        keyGen.initialize(dhParams);
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        if (!areEqual(encodeParams, encodeParams_2))
        {
            fail("encode/decode parameters failed");
        }

        DHParameterSpec dhP = (DHParameterSpec)params.getParameterSpec(DHParameterSpec.class);

        testGP(size, 0, dhP.getG(), dhP.getP());
    }
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    }

    private void testDESAndDESede(BigInteger g, BigInteger p)
        throws Exception
    {
        DHParameterSpec             dhParams = new DHParameterSpec(p, g, 256);

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

        keyGen.initialize(dhParams);
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    JCEDHPublicKey(
        DHPublicKeySpec    spec)
    {
        this.y = spec.getY();
        this.dhSpec = new DHParameterSpec(spec.getP(), spec.getG());
    }
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    JCEDHPublicKey(
        DHPublicKeyParameters  params)
    {
        this.y = params.getY();
        this.dhSpec = new DHParameterSpec(params.getParameters().getP(), params.getParameters().getG(), params.getParameters().getL());
    }
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        }

        this.y = derY.getValue();
        if (params.getL() != null)
        {
            this.dhSpec = new DHParameterSpec(params.getP(), params.getG(), params.getL().intValue());
        }
        else
        {
            this.dhSpec = new DHParameterSpec(params.getP(), params.getG());
        }
    }
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    private void readObject(
        ObjectInputStream   in)
        throws IOException, ClassNotFoundException
    {
        this.y = (BigInteger)in.readObject();
        this.dhSpec = new DHParameterSpec((BigInteger)in.readObject(), (BigInteger)in.readObject(), in.readInt());
    }
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