Example usage for javax.crypto Cipher doFinal

Introduction

In this page you can find the example usage for javax.crypto Cipher doFinal.

Prototype

public final byte[] doFinal(byte[] input) throws IllegalBlockSizeException, BadPaddingException 

Source Link

Document

Encrypts or decrypts data in a single-part operation, or finishes a multiple-part operation.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    byte[] input = "abc".getBytes();
    Cipher cipher = Cipher.getInstance("RSA/None/OAEPWithSHA1AndMGF1Padding", "BC");
    SecureRandom random = new SecureRandom();
    KeyPairGenerator generator = KeyPairGenerator.getInstance("RSA", "BC");

    generator.initialize(386, random);//  ww w  .j ava  2 s  .c  o  m

    KeyPair pair = generator.generateKeyPair();
    Key pubKey = pair.getPublic();

    Key privKey = pair.getPrivate();

    cipher.init(Cipher.ENCRYPT_MODE, pubKey, random);
    byte[] cipherText = cipher.doFinal(input);
    System.out.println("cipher: " + new String(cipherText));

    cipher.init(Cipher.DECRYPT_MODE, privKey);
    byte[] plainText = cipher.doFinal(cipherText);
    System.out.println("plain : " + new String(plainText));
}

---

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

    byte[] input = new byte[] { (byte) 0xbe, (byte) 0xef };
    Cipher cipher = Cipher.getInstance("RSA/None/NoPadding", "BC");

    KeyFactory keyFactory = KeyFactory.getInstance("RSA", "BC");
    RSAPublicKeySpec pubKeySpec = new RSAPublicKeySpec(new BigInteger("12345678", 16),
            new BigInteger("11", 16));
    RSAPrivateKeySpec privKeySpec = new RSAPrivateKeySpec(new BigInteger("12345678", 16),
            new BigInteger("12345678", 16));

    RSAPublicKey pubKey = (RSAPublicKey) keyFactory.generatePublic(pubKeySpec);
    RSAPrivateKey privKey = (RSAPrivateKey) keyFactory.generatePrivate(privKeySpec);

    cipher.init(Cipher.ENCRYPT_MODE, pubKey);

    byte[] cipherText = cipher.doFinal(input);
    System.out.println("cipher: " + new String(cipherText));

    cipher.init(Cipher.DECRYPT_MODE, privKey);
    byte[] plainText = cipher.doFinal(cipherText);
    System.out.println("plain : " + new String(plainText));
}

---

From source file:com.edduarte.protbox.Protbox.java

public static void main(String... args) {

    // activate debug / verbose mode
    if (args.length != 0) {
        List<String> argsList = Arrays.asList(args);
        if (argsList.contains("-v")) {
            Constants.verbose = true;/*from  ww  w  . ja v a2 s. co  m*/
        }
    }

    // use System's look and feel
    try {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    } catch (Exception ex) {
        // If the System's look and feel is not obtainable, continue execution with JRE look and feel
    }

    // check this is a single instance
    try {
        new ServerSocket(1882);
    } catch (IOException ex) {
        JOptionPane.showMessageDialog(null,
                "Another instance of Protbox is already running.\n" + "Please close the other instance first.",
                "Protbox already running", JOptionPane.ERROR_MESSAGE);
        System.exit(1);
    }

    // check if System Tray is supported by this operative system
    if (!SystemTray.isSupported()) {
        JOptionPane.showMessageDialog(null,
                "Your operative system does not support system tray functionality.\n"
                        + "Please try running Protbox on another operative system.",
                "System tray not supported", JOptionPane.ERROR_MESSAGE);
        System.exit(1);
    }

    // add PKCS11 providers
    FileFilter fileFilter = new AndFileFilter(new WildcardFileFilter(Lists.newArrayList("*.config")),
            HiddenFileFilter.VISIBLE);

    File[] providersConfigFiles = new File(Constants.PROVIDERS_DIR).listFiles(fileFilter);

    if (providersConfigFiles != null) {
        for (File f : providersConfigFiles) {
            try {
                List<String> lines = FileUtils.readLines(f);
                String aliasLine = lines.stream().filter(line -> line.contains("alias")).findFirst().get();
                lines.remove(aliasLine);
                String alias = aliasLine.split("=")[1].trim();

                StringBuilder sb = new StringBuilder();
                for (String s : lines) {
                    sb.append(s);
                    sb.append("\n");
                }

                Provider p = new SunPKCS11(new ReaderInputStream(new StringReader(sb.toString())));
                Security.addProvider(p);

                pkcs11Providers.put(p.getName(), alias);

            } catch (IOException | ProviderException ex) {
                if (ex.getMessage().equals("Initialization failed")) {
                    ex.printStackTrace();

                    String s = "The following error occurred:\n" + ex.getCause().getMessage()
                            + "\n\nIn addition, make sure you have "
                            + "an available smart card reader connected before opening the application.";
                    JTextArea textArea = new JTextArea(s);
                    textArea.setColumns(60);
                    textArea.setLineWrap(true);
                    textArea.setWrapStyleWord(true);
                    textArea.setSize(textArea.getPreferredSize().width, 1);

                    JOptionPane.showMessageDialog(null, textArea, "Error loading PKCS11 provider",
                            JOptionPane.ERROR_MESSAGE);
                    System.exit(1);
                } else {
                    ex.printStackTrace();
                    JOptionPane.showMessageDialog(null,
                            "Error while setting up PKCS11 provider from configuration file " + f.getName()
                                    + ".\n" + ex.getMessage(),
                            "Error loading PKCS11 provider", JOptionPane.ERROR_MESSAGE);
                }
            }
        }
    }

    // adds a shutdown hook to save instantiated directories into files when the application is being closed
    Runtime.getRuntime().addShutdownHook(new Thread(Protbox::exit));

    // get system tray and run tray applet
    tray = SystemTray.getSystemTray();
    SwingUtilities.invokeLater(() -> {

        if (Constants.verbose) {
            logger.info("Starting application");
        }

        //Start a new TrayApplet object
        trayApplet = TrayApplet.getInstance();
    });

    // prompts the user to choose which provider to use
    ProviderListWindow.showWindow(Protbox.pkcs11Providers.keySet(), providerName -> {

        // loads eID token
        eIDTokenLoadingWindow.showPrompt(providerName, (returnedUser, returnedCertificateData) -> {
            user = returnedUser;
            certificateData = returnedCertificateData;

            // gets a password to use on the saved registry files (for loading and saving)
            final AtomicReference<Consumer<SecretKey>> consumerHolder = new AtomicReference<>(null);
            consumerHolder.set(password -> {
                registriesPasswordKey = password;
                try {
                    // if there are serialized files, load them if they can be decoded by this user's private key
                    final List<SavedRegistry> serializedDirectories = new ArrayList<>();
                    if (Constants.verbose) {
                        logger.info("Reading serialized registry files...");
                    }

                    File[] registryFileList = new File(Constants.REGISTRIES_DIR).listFiles();
                    if (registryFileList != null) {
                        for (File f : registryFileList) {
                            if (f.isFile()) {
                                byte[] data = FileUtils.readFileToByteArray(f);
                                try {
                                    Cipher cipher = Cipher.getInstance("AES");
                                    cipher.init(Cipher.DECRYPT_MODE, registriesPasswordKey);
                                    byte[] registryDecryptedData = cipher.doFinal(data);
                                    serializedDirectories.add(new SavedRegistry(f, registryDecryptedData));
                                } catch (GeneralSecurityException ex) {
                                    if (Constants.verbose) {
                                        logger.info("Inserted Password does not correspond to " + f.getName());
                                    }
                                }
                            }
                        }
                    }

                    // if there were no serialized directories, show NewDirectory window to configure the first folder
                    if (serializedDirectories.isEmpty() || registryFileList == null) {
                        if (Constants.verbose) {
                            logger.info("No registry files were found: running app as first time!");
                        }
                        NewRegistryWindow.start(true);

                    } else { // there were serialized directories
                        loadRegistry(serializedDirectories);
                        trayApplet.repaint();
                        showTrayApplet();
                    }

                } catch (AWTException | IOException | GeneralSecurityException | ReflectiveOperationException
                        | ProtboxException ex) {

                    JOptionPane.showMessageDialog(null,
                            "The inserted password was invalid! Please try another one!", "Invalid password!",
                            JOptionPane.ERROR_MESSAGE);
                    insertPassword(consumerHolder.get());
                }
            });
            insertPassword(consumerHolder.get());
        });
    });
}

---

From source file:cn.util.RSAUtils.java

public static void main(String[] args) throws Exception {
    // TODO Auto-generated method stub
    //      HashMap<String, Object> map = RSAUtils.getKeys();
    //      //??/*w w  w . ja  v  a2  s. com*/
    //      RSAPublicKey publicKey = (RSAPublicKey) map.get("public");
    //      RSAPrivateKey privateKey = (RSAPrivateKey) map.get("private");

    //
    String ming = "wow";
    //??
    RSAPublicKey pubKey = RSAUtils.getPublicKey();
    RSAPrivateKey priKey = RSAUtils.getPrivateKey();
    System.err.println(":" + Base64Util.encryptBASE64(pubKey.getEncoded()));
    System.err.println("?:" + Base64Util.encryptBASE64(priKey.getEncoded()));

    //?
    String mi = RSAUtils.encryptByPublicKey(ming);
    System.err.println("?:" + mi);
    //?
    //mi="aYlJTFE+cQjwsVkhmQrFnlwSPSidfPFbSaez8qw47xEfqwhPHX9na+7KoFwere3F2Incr0OoBhNt\nK8cqKwHtzuvJMW3/rz0X8n9Jld22lrsh9TOcEiq3Xwk3jTfNhGNnOEQIsOYVZs3Qqumdm0tAu7y6\nBHSE8kbfhRIPsqOys+0=";

    String[] mis = mi.split("#");

    String ming1 = "";
    for (String string : mis) {
        ming1 += RSAUtils.decryptByPrivateKey(string);
    }
    System.err.println("?:" + ming);
    System.err.println("?:" + ming1);
    // String a = "cVqjXrpazESBCFmZy5HxIy+C5o0PbYk9iCtBHBCGi8TMRPp2LpsVblrZIGrCw4s/fPEJp5pL7pBfZw4HDx412OfQpMCxezTltNNRWQBbFYCz/FHj6GeX7KAnkZhTC4hTZSHp1EyIa5EMsF6xdFtHuki98KS+75L3Z1Iln1efk2Y=";
    //      System.out.println(RSAUtils.decryptByPrivateKey(a));
    //      System.out.println(RSAUtils.decryptByPrivateKey(null));
    //      

    RSAPrivateKey privateKey = getPrivateKey();
    Cipher cipher = Cipher.getInstance("RSA");
    cipher.init(Cipher.DECRYPT_MODE, privateKey);
    //
    //int key_len = privateKey.getModulus().bitLength() / 8;

    String srcstring = "NKUsmMdJpSeAVFSk3hMwBoWsA7t/wOMc8hfzo2dwPIULOo1y0AUwPTDxVLw7AK1888rdyp/3U38y5eQUjuNQH68XN4jm7MHdRm+bnO6XUHuZLiXNFkLpVCAM5hVh6TTcOz3QIE9rhP+Up1WRxnq/PDuM/cXIeNWjBLbW4Iic9/w=#fRdhSf+a3xVktmJ6J0AJTW30wqpwQslN0Bxdyzpyr6u6VEj/Vo/5MpzZsVeIyBU/CzVvvkrvs5LKTagaA3M4thH3mz4gfMTrw746n4NhujZEUEehvNQIFdUBjKWPAI0XUtdcQQTtdUJbIWmuhTYxKParm0G8cNz5DSTRUTIw2fQ=#a9CaDtGkhVQNwgxHl0oJ8I/383pE3kE8yF76OyDtfeQsT50izuk44xQ34ersgzKkKSA8IB0W3SSw2bedsaj8A9dxrSf+S8S8w/Sg3G3/IA8pKaQqJD4idTCUFxjczf32aQbv+eUbs7fenAPKb3rpn+R+Q/c5y6jTEG5h+H27MsY=#N/dn52TTgJ+EoxTSp3weagZ+ggrIPl4rtKfzo0f/j2lMtXMfCQN7xgGiwDpv4Rele/58NV2X0ezDXjB3wtVugIA3nhKSNnsjEs/os1Zl2XO1EKuTnLGSJFSPS6yyr4o0wxHEeA52qA1UXaYS9clpjraXCDWuRrTpyQfONVDXGZ4=#P48NIZj+L8stk0CCNwAQmKZPH0/7GfOhhc9s/MONVPHBPRYo9N47Kb71PJszhrLsoEM2/VZD1Ech4HH8UmWhW6XPnVAWy/lS1nZDD/GEoTZvoN4Rw7oiWUGj2i+2SMyjcET9mnVPBUrgTmP8He5OFV6oIa1mAN95V4UkbXwYApw=#h79I/zTTAc2TA7j4k2wq5hrotElhskZudnuTViRvR2Ot9rAlFzdl1WasY0e+9pi7dCi40F5+2U7eVNuWLA9qvFKwgUSxA+z6FI++p0fAGsboJna9qwcplByYWh6DFPiPVFlRD2CTOZU+U/rfFn8wRT/qgLGyNI23/2el0fC1Bb0=";

    String stringarray[] = srcstring.split("#");

    List<byte[]> srcArrays = new ArrayList<byte[]>();

    for (String stemp : stringarray) {
        byte[] byte_temp = Base64Util.decryptBASE64(stemp);
        byte_temp = cipher.doFinal(byte_temp);
        srcArrays.add(byte_temp);

    }

    byte[] byte_sta = sysCopy(srcArrays);

    System.err.println(new String(byte_sta));
}

---

From source file:Main.java

/**
 * Invokes the Cipher to perform encryption or decryption (depending on the initialized mode).
 *///  w w  w  .  j a v  a 2s  .c o  m
public static byte[] doFinal(Cipher cipher, byte[] input) {
    try {
        return cipher.doFinal(input);
    } catch (IllegalBlockSizeException e) {
        throw new IllegalStateException("Unable to invoke Cipher due to illegal block size", e);
    } catch (BadPaddingException e) {
        throw new IllegalStateException("Unable to invoke Cipher due to bad padding", e);
    }
}

---

From source file:Main.java

public static byte[] encryptAES(SecretKey sKey, byte[] message) throws NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.ENCRYPT_MODE, sKey);
    return c.doFinal(message);
}

---

From source file:Main.java

public static byte[] decryptAES(SecretKey sKey, byte[] message) throws NoSuchAlgorithmException,
        NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException {
    Cipher c = Cipher.getInstance("AES");
    c.init(Cipher.DECRYPT_MODE, sKey);
    return c.doFinal(message);
}

---

From source file:Main.java

public static byte[] encrypt(byte[] data, byte[] key) throws Exception {
    SecretKey secretKey = new SecretKeySpec(key, "AES");
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

---

From source file:Main.java

public static byte[] encrypt(byte[] data, byte[] key) throws Exception {
    SecretKey secretKey = new SecretKeySpec(key, "DESede");
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.ENCRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

---

From source file:Main.java

public static byte[] decrypt(byte[] data, byte[] key) throws Exception {
    SecretKey secretKey = new SecretKeySpec(key, "DESede");
    Cipher cipher = Cipher.getInstance("DESede");
    cipher.init(Cipher.DECRYPT_MODE, secretKey);
    return cipher.doFinal(data);
}

---

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