Examples of java.security.KeyFactory.generatePublic()

java.security.KeyFactory.generatePublic()
Generates a public key object from the provided key specification (key material). @param keySpec the specification (key material) of the public key. @return the public key. @exception InvalidKeySpecException if the given key specificationis inappropriate for this key factory to produce a public key.


        pubEnc = pubKey.getEncoded();
        keyFac = KeyFactory.getInstance(pubKey.getAlgorithm(), "BC");
        pubX509 = new X509EncodedKeySpec(pubEnc);


        pubKey = (PublicKey)keyFac.generatePublic(pubX509);


        //
        // double private key encoding test
        //
        byte[]              privEnc = privKey.getEncoded();

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        BigInteger s)
        throws Exception
    {
        KeyFactory          f = KeyFactory.getInstance("ECDSA", "BC");
        PrivateKey          sKey = f.generatePrivate(priKey);
        PublicKey           vKey = f.generatePublic(pubKey);


        sgr.initSign(sKey, k);


        sgr.update(message);

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


        KeyFactory fact = KeyFactory.getInstance("ECDSA", "BC");


        vKey = (ECPublicKey)fact.generatePublic(new ECPublicKeySpec(vKey.getQ(), null));
        sKey = (ECPrivateKey)fact.generatePrivate(new ECPrivateKeySpec(sKey.getD(), null));
        
        testECDSA(sKey, vKey);


        testBCParamsAndQ(sKey, vKey);

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        testBCParamsAndQ(sKey, vKey);
        testEC5Params(sKey, vKey);


        testEncoding(sKey, vKey);


        ECPublicKey vKey2 = (ECPublicKey)fact.generatePublic(new ECPublicKeySpec(vKey.getQ(), ecSpec));
        ECPrivateKey sKey2 = (ECPrivateKey)fact.generatePrivate(new ECPrivateKeySpec(sKey.getD(), ecSpec));


        if (!vKey.equals(vKey2) || vKey.hashCode() != vKey2.hashCode())
        {
            fail("private equals/hashCode failed");

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        if (!vInfo.getAlgorithm().getParameters().equals(DERNull.INSTANCE))
        {
            fail("public key parameters wrong");
        }
        
        ECPublicKey vKey = (ECPublicKey)kFact.generatePublic(new X509EncodedKeySpec(bytes));


        if (!vKey.equals(pubKey) || vKey.hashCode() != pubKey.hashCode())
        {
            fail("public equals/hashCode failed");
        }

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             {
                 KeyFactory kf = KeyFactory.getInstance(wrappedKeyAlgorithm, BouncyCastleProvider.PROVIDER_NAME);


                 if (wrappedKeyType == Cipher.PUBLIC_KEY)
                 {
                     return kf.generatePublic(new X509EncodedKeySpec(encoded));
                 }
                 else if (wrappedKeyType == Cipher.PRIVATE_KEY)
                 {
                     return kf.generatePrivate(new PKCS8EncodedKeySpec(encoded));
                 }

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            spec);


        Signature sgr = Signature.getInstance("DSTU4145", "BC");
        KeyFactory f = KeyFactory.getInstance("DSTU4145", "BC");
        PrivateKey sKey = f.generatePrivate(priKey);
        PublicKey vKey = f.generatePublic(pubKey);


        sgr.initSign(sKey, k);


        byte[] message = new byte[]{(byte)'a', (byte)'b', (byte)'c'};

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        //
        // set up the keys
        //
        KeyFactory          fact = KeyFactory.getInstance("RSA", "BC");
        PrivateKey          caPrivKey = fact.generatePrivate(caPrivKeySpec);
        PublicKey           caPubKey = fact.generatePublic(caPubKeySpec);
        PrivateKey          intPrivKey = fact.generatePrivate(intPrivKeySpec);
        PublicKey           intPubKey = fact.generatePublic(intPubKeySpec);
        PrivateKey          privKey = fact.generatePrivate(privKeySpec);
        PublicKey           pubKey = fact.generatePublic(pubKeySpec);

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        //
        KeyFactory          fact = KeyFactory.getInstance("RSA", "BC");
        PrivateKey          caPrivKey = fact.generatePrivate(caPrivKeySpec);
        PublicKey           caPubKey = fact.generatePublic(caPubKeySpec);
        PrivateKey          intPrivKey = fact.generatePrivate(intPrivKeySpec);
        PublicKey           intPubKey = fact.generatePublic(intPubKeySpec);
        PrivateKey          privKey = fact.generatePrivate(privKeySpec);
        PublicKey           pubKey = fact.generatePublic(pubKeySpec);


        Certificate[] chain = new Certificate[3];

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        PrivateKey          caPrivKey = fact.generatePrivate(caPrivKeySpec);
        PublicKey           caPubKey = fact.generatePublic(caPubKeySpec);
        PrivateKey          intPrivKey = fact.generatePrivate(intPrivKeySpec);
        PublicKey           intPubKey = fact.generatePublic(intPubKeySpec);
        PrivateKey          privKey = fact.generatePrivate(privKeySpec);
        PublicKey           pubKey = fact.generatePublic(pubKeySpec);


        Certificate[] chain = new Certificate[3];


        chain[2] = createMasterCert(caPubKey, caPrivKey);
        chain[1] = createIntermediateCert(intPubKey, caPrivKey, (X509Certificate)chain[2]);

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