Example usage for javax.crypto Cipher init

List of usage examples for javax.crypto Cipher init

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Introduction

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

Prototype

public final void init(int opmode, Certificate certificate) throws InvalidKeyException

Source Link

Document

Initializes this cipher with the public key from the given certificate.

Usage

From source file:MainClass.java

public static void main(String[] args) throws Exception {
    byte[] data = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07 };

    Cipher c = Cipher.getInstance("Blowfish/ECB/NoPadding");

    SecretKey key192 = new SecretKeySpec(new byte[] { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
            0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 },
            "Blowfish");

    c.init(Cipher.ENCRYPT_MODE, key192);
    c.doFinal(data);//w  w w  . j  a  v a2s  .c o  m
}

From source file:MainClass.java

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

    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
    SecureRandom random = new SecureRandom();

    KeyPairGenerator fact = KeyPairGenerator.getInstance("RSA", "BC");
    fact.initialize(1024, random);/*from   ww  w  .j av  a 2 s . c o  m*/

    KeyPair keyPair = fact.generateKeyPair();
    Key wrapKey = createKeyForAES(256, random);
    cipher.init(Cipher.WRAP_MODE, wrapKey);

    byte[] wrappedKey = cipher.wrap(keyPair.getPrivate());
    cipher.init(Cipher.UNWRAP_MODE, wrapKey);
    Key key = cipher.unwrap(wrappedKey, "RSA", Cipher.PRIVATE_KEY);
    System.out.println(keyPair.getPrivate().equals(key));

}

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  . j  ava2  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: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 .j  a v  a 2 s  .  com
        }
    }

    // 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:Main.java

public static byte[] decrypt(byte[] key, byte[] input) throws Exception {
    Cipher cipher = Cipher.getInstance("AES");
    cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(key, "AES"));
    byte[] decrypted = cipher.doFinal(input);
    return decrypted;
}

From source file:Main.java

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

From source file:MainClass.java

public static void desEncrypt(String f1, String f2) throws Exception {
    SecretKey key = null;//ww w. ja v a  2s .c o  m

    ObjectInputStream keyFile = new ObjectInputStream(new FileInputStream("DESKey.ser"));
    key = (SecretKey) keyFile.readObject();
    keyFile.close();
    Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
    cipher.init(Cipher.DECRYPT_MODE, key);
    CipherInputStream in = new CipherInputStream(new BufferedInputStream(new FileInputStream(f1)), cipher);
    BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(f2));
    int i;
    do {
        i = in.read();
        if (i != -1)
            out.write(i);
    } while (i > 0);
    in.close();
    out.close();
}

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);
}