Examples of java.security.spec.KeySpec

java.security.spec.KeySpec
A (transparent) specification of the key material that constitutes a cryptographic key.
If the key is stored on a hardware device, its specification may contain information that helps identify the key on the device.
A key may be specified in an algorithm-specific way, or in an algorithm-independent encoding format (such as ASN.1). For example, a DSA private key may be specified by its components x, p, q, and g (see {@link DSAPrivateKeySpec}), or it may be specified using its DER encoding (see {@link PKCS8EncodedKeySpec}).
This interface contains no methods or constants. Its only purpose is to group (and provide type safety for) all key specifications. All key specifications must implement this interface. @author Jan Luehe @version 1.18, 11/17/05 @see java.security.Key @see java.security.KeyFactory @see EncodedKeySpec @see X509EncodedKeySpec @see PKCS8EncodedKeySpec @see DSAPrivateKeySpec @see DSAPublicKeySpec @since 1.2

        catch (Exception e)
        {
            fail("unexpected exception.", e);
        }
        
        KeySpec ks = null;
        SecretKey secKey = null;
        byte[] bb = new byte[24];


        try
        {
            skF.getKeySpec(null, null);
            
            fail("failed exception test - no exception thrown");
        }
        catch (InvalidKeySpecException e)
        {
            // ignore okay
        }
        catch (Exception e)
        {
            fail("failed exception test.", e);
        }
        try
        {
            ks = (KeySpec)new DESedeKeySpec(bb);
            skF.getKeySpec(null, ks.getClass());
            
            fail("failed exception test - no exception thrown");
        }
        catch (InvalidKeySpecException e)
        {

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    } else{
      classkeyspec=Class.forName(FinalValue.ALGORITHM_DES_CLASS);
    }
    
    Constructor constructor = classkeyspec.getConstructor(new Class[]{byte[].class});
    KeySpec dks = (KeySpec) constructor.newInstance(new Object[]{rawKeyData});
    // ����һ����Կ������Ȼ��������DESKeySpecת����SecretKey����
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
    SecretKey key = keyFactory.generateSecret(dks);
    // Cipher����ʵ����ɼ��ܲ���
    Cipher cipher = Cipher.getInstance(algorithm);

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    }else{
      classkeyspec=Class.forName(FinalValue.ALGORITHM_DES_CLASS);
        
    }
    Constructor constructor = classkeyspec.getConstructor(new Class[]{byte[].class});
    KeySpec dks = (KeySpec) constructor.newInstance(new Object[]{rawKeyData}); //new DESKeySpec(rawKeyData);
    // ����һ����Կ������Ȼ��������DESKeySpec����ת����Secret Key����
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
    SecretKey key = keyFactory.generateSecret(dks);
    // Cipher����ʵ����ɽ��ܲ���
    Cipher cipher = Cipher.getInstance(algorithm);

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        }
    }


    private static byte[] cipher(String key, byte[] passedBytes, int cipherMode) throws EncryptionException {
        try {
            final KeySpec keySpec = new DESedeKeySpec(stringToByteArray(key));
            final SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
            final Cipher cipher = Cipher.getInstance("DESede/ECB/PKCS5Padding");
            final SecretKey secretKey = keyFactory.generateSecret(keySpec);
            cipher.init(cipherMode, secretKey);
            return cipher.doFinal(passedBytes);

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    {
        int         keyType = dIn.read();
        String      format = dIn.readUTF();
        String      algorithm = dIn.readUTF();
        byte[]      enc = new byte[dIn.readInt()];
        KeySpec     spec;


        dIn.readFully(enc);


        if (format.equals("PKCS#8") || format.equals("PKCS8"))
        {

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     * The test checks out that the method returns DSAPublicKey
     * if argument is "DSAPublicKeySpec"
     */
    public final void testGeneratePublicKeySpec03() throws Exception {


        KeySpec keySpec = (KeySpec) new DSAPublicKeySpec(publicY, publicP, publicQ, publicG);


        checkPublicKeys( (DSAPublicKey) kf.generatePublic(keySpec) );
    }

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     * The test checks out that the method returns DSAPrivateKey
     * if argument is "DSAPrivateKeySpec"
     */
    public final void testGeneratePrivateKeySpec03() throws Exception {


        KeySpec keySpec = (KeySpec) new DSAPrivateKeySpec(privateX, 
                                                          privateP, privateQ, privateG);


        checkPrivateKeys( (DSAPrivateKey) kf.generatePrivate(keySpec) );
    }

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     *    expected "DSAPublicKeySpec" or "X509EncodedKeySpec", and 
     * 2) DSAPublickey object generated from KeySpec is equal a "publicKey" argument.
     */
    public final void testGetKeySpec03() throws Exception {


        KeySpec ks;


        ks = kf.getKeySpec( publicKey, DSAPublicKeySpec.class);
        checkPublicKeys( (DSAPublicKey) kf.generatePublic((DSAPublicKeySpec) ks) );


        ks = kf.getKeySpec( publicKey, X509EncodedKeySpec.class);

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          expected "DSAPrivateKeySpec" or "PKCS8EncodedKeySpec", and 
     * 2) DSAPublickey object generated from KeySpec is equal a "privateKey" argument.
     */
    public final void testGetKeySpec04() throws Exception {


        KeySpec ks;


        ks = kf.getKeySpec( privateKey, DSAPrivateKeySpec.class);
        checkPrivateKeys( (DSAPrivateKey) kf.generatePrivate((DSAPrivateKeySpec) ks) );


        ks = kf.getKeySpec( privateKey, PKCS8EncodedKeySpec.class);

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        KeyPair keys = keyGen.generateKeyPair();
        if (keepalive != null) {
          keepalive.interrupt();
        }


        KeySpec privateKeySpec = fact.getKeySpec(keys.getPrivate(),
            getPrivateKeySpecClass(keyfactAlgs[i]));
        PrivateKey privateKey = fact.generatePrivate(privateKeySpec);
        boolean samePrivate = Arrays.equals(keys.getPrivate()
            .getEncoded(), privateKey.getEncoded());
        assertTrue(

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