Example usage for javax.crypto KeyGenerator getInstance

Introduction

In this page you can find the example usage for javax.crypto KeyGenerator getInstance.

Prototype

public static final KeyGenerator getInstance(String algorithm) throws NoSuchAlgorithmException

Source Link

Document

Returns a KeyGenerator object that generates secret keys for the specified algorithm.

Usage

From source file:wssec.TestWSSecurityNew14.java

/**
 * Setup method/*  w  w w .j  a v  a  2 s .  c o m*/
 * <p/>
 * 
 * @throws java.lang.Exception Thrown when there is a problem in setup
 */
protected void setUp() throws Exception {
    AxisClient tmpEngine = new AxisClient(new NullProvider());
    msgContext = new MessageContext(tmpEngine);
    unsignedEnvelope = getSOAPEnvelope();

    KeyGenerator keyGen = KeyGenerator.getInstance("AES");
    keyGen.init(128);
    key = keyGen.generateKey();
    keyData = key.getEncoded();
}

From source file:com.kk.dic.action.Upload.java

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    out = response.getWriter();//from   www.j  ava2 s .c  o  m
    Connection con;
    PreparedStatement pstm = null;
    String fname = "";
    String keyword = "";
    String cd = "";
    String a = (String) request.getSession().getAttribute("email");
    System.out.println("User Name : " + a);
    try {
        boolean isMultipartContent = ServletFileUpload.isMultipartContent(request);
        if (!isMultipartContent) {
            return;
        }
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        out.print("one");
        try {
            List<FileItem> fields = upload.parseRequest(request);
            Iterator<FileItem> it = fields.iterator();
            if (!it.hasNext()) {
                return;
            }

            while (it.hasNext()) {
                FileItem fileItem = it.next();
                if (fileItem.getFieldName().equals("name")) {
                    fname = fileItem.getString();
                    System.out.println("File Name" + fname);
                } else if (fileItem.getFieldName().equals("keyword")) {
                    keyword = fileItem.getString();
                    System.out.println("File Keyword" + keyword);
                } else {

                }
                boolean isFormField = fileItem.isFormField();
                if (isFormField) {
                } else {
                    out.print("one");
                    try {
                        con = Dbconnection.getConnection();
                        pstm = con.prepareStatement(
                                "insert into files (file, keyword, filetype, filename, CDate, owner, size, data, frank, file_key)values(?,?,?,?,?,?,?,?,?,?)");
                        out.println("getD " + fileItem.getName());
                        String str = getStringFromInputStream(fileItem.getInputStream());
                        // secretkey generating
                        KeyGenerator keyGen = KeyGenerator.getInstance("AES");
                        keyGen.init(128);
                        SecretKey secretKey = keyGen.generateKey();
                        System.out.println("secret key:" + secretKey);
                        //converting secretkey to String
                        byte[] be = secretKey.getEncoded();//encoding secretkey
                        String skey = Base64.encode(be);
                        System.out.println("converted secretkey to string:" + skey);
                        String cipher = new encryption().encrypt(str, secretKey);
                        System.out.println(str);
                        //for get extension from given file
                        String b = fileItem.getName().substring(fileItem.getName().lastIndexOf('.'));
                        System.out.println("File Extension" + b);
                        pstm.setBinaryStream(1, fileItem.getInputStream());
                        pstm.setString(2, keyword);
                        pstm.setString(3, b);
                        pstm.setString(4, fname);
                        pstm.setDate(5, getCurrentDate());
                        pstm.setString(6, a);
                        pstm.setLong(7, fileItem.getSize());
                        pstm.setString(8, cipher);
                        pstm.setString(9, "0");
                        pstm.setString(10, skey);
                        /*Cloud Start*/
                        File f = new File("D:/" + fileItem.getName());
                        out.print("<br/>" + f.getName());
                        FileWriter fw = new FileWriter(f);
                        fw.write(cipher);
                        fw.close();
                        Ftpcon ftpcon = new Ftpcon();
                        ftpcon.upload(f, fname);
                        /*Cloud End*/
                        int i = pstm.executeUpdate();
                        if (i == 1) {
                            response.sendRedirect("upload.jsp?msg=success");
                        } else {
                            response.sendRedirect("upload.jsp?msgg=failed");
                        }
                        con.close();
                    } catch (Exception e) {
                        out.println(e);
                    }
                }
            }
        } catch (Exception ex) {
            out.print(ex);
            Logger.getLogger(Upload.class.getName()).log(Level.SEVERE, null, ex);
        }
    } finally {
        out.close();
    }
}

From source file:org.sonar.process.AesCipher.java

String generateRandomSecretKey() {
    try {//from   ww w .  j  a  va2s. c  o m
        KeyGenerator keyGen = KeyGenerator.getInstance(CRYPTO_KEY);
        keyGen.init(KEY_SIZE_IN_BITS, new SecureRandom());
        SecretKey secretKey = keyGen.generateKey();
        return Base64.encodeBase64String(secretKey.getEncoded());

    } catch (Exception e) {
        throw new IllegalStateException("Fail to generate secret key", e);
    }
}

From source file:org.lightjason.agentspeak.action.builtin.TestCActionCrypto.java

/**
 * test wrong algorithm//from w w  w.j ava 2 s  .  com
 *
 * @throws NoSuchAlgorithmException is thrown on key generator error
 */
@Test
public final void wrongalgorithm() throws NoSuchAlgorithmException {
    final Key l_key = KeyGenerator.getInstance("HmacSHA1").generateKey();

    Assert.assertFalse(new CEncrypt()
            .execute(false, IContext.EMPTYPLAN,
                    Stream.of(l_key).map(CRawTerm::from).collect(Collectors.toList()), Collections.emptyList())
            .value());

    Assert.assertFalse(new CDecrypt()
            .execute(false, IContext.EMPTYPLAN,
                    Stream.of(l_key).map(CRawTerm::from).collect(Collectors.toList()), Collections.emptyList())
            .value());
}

From source file:com.muk.services.commerce.CryptoServiceImpl.java

@PostConstruct
public void postConstruct() {
    try {//w w w  .  j ava 2 s  . c  om
        final KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        temporaryKey = new SecretKeySpec(kgen.generateKey().getEncoded(), "AES");

        final Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        final byte[] iv = new byte[cipher.getBlockSize()];
        new SecureRandom().nextBytes(iv);
        ivSpec = new IvParameterSpec(iv);
    } catch (final NoSuchAlgorithmException ex) {
        LOG.error("Failed to initalize encryption key", ex);
    } catch (final NoSuchPaddingException padEx) {
        LOG.error("Failed to get cipher.", padEx);
    }
}

From source file:de.taimos.dvalin.interconnect.model.MessageCryptoUtil.java

private static void generateKey() {
    try {//w ww  . j  a  va 2 s . c  o m
        final KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        final SecretKey skey = kgen.generateKey();
        System.out.println("Key: " + Hex.encodeHexString(skey.getEncoded()));
    } catch (final NoSuchAlgorithmException e) {
        e.printStackTrace();
    }
}

From source file:org.silverpeas.core.security.encryption.ContentEncryptionServiceTest.java

/**
 * Generates a key for an AES enciphering.
 * @return the key in hexadecimal.//w  ww.j  a  v  a2  s.  c  o m
 * @throws Exception if the key cannot be generated.
 */
public static String generateAESKey() throws Exception {
    KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
    keyGenerator.init(256);
    SecretKey skey = keyGenerator.generateKey();
    return EncodingUtil.asHex(skey.getEncoded());
}

From source file:com.miyue.util.Cryptos.java

/**
 * ?AES,?128,192,256?./*from   w  w w. j av  a 2  s . co m*/
 */
public static byte[] generateAesKey(int keysize) {
    try {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(AES);
        keyGenerator.init(keysize);
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    } catch (GeneralSecurityException e) {
        throw Exceptions.unchecked(e);
    }
}

From source file:com.ironchain.common.kits.DigestKit.java

/**
 * ?HMAC-SHA1,,160?(20). HMAC-SHA1?,//from www  .  j  a  va  2s .c o m
 * RFC2401160?(20).
 */
public static byte[] generateHmacSha1Key() {
    try {
        KeyGenerator keyGenerator = KeyGenerator.getInstance(HMACSHA1);
        keyGenerator.init(DEFAULT_HMACSHA1_KEYSIZE);
        SecretKey secretKey = keyGenerator.generateKey();
        return secretKey.getEncoded();
    } catch (GeneralSecurityException e) {
        throw new RuntimeException(e);
    }
}

From source file:org.opensafety.hishare.util.implementation.EncryptionImpl.java

public String createPassword() throws CryptographyException {
    KeyGenerator kgen;/*from w w  w  .j  a  va  2s. c o  m*/
    try {
        kgen = KeyGenerator.getInstance(keyGenerator);
    } catch (NoSuchAlgorithmException e) {
        throw new CryptographyException(e.getMessage());
    }

    kgen.init(passwordLength);

    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();

    return new String(Hex.encodeHex(raw));
}