Example usage for java.security SecureRandom SecureRandom

Introduction

In this page you can find the example usage for java.security SecureRandom SecureRandom.

Prototype

public SecureRandom()

Source Link

Document

Constructs a secure random number generator (RNG) implementing the default random number algorithm.

Usage

From source file:org.cloudfoundry.community.servicebroker.postgresql.service.Role.java

public String bindRoleToDatabase(String dbInstanceId) throws SQLException {
    Utils.checkValidUUID(dbInstanceId);/*  w ww.j  a  va 2s .c  o  m*/

    SecureRandom random = new SecureRandom();
    String passwd = new BigInteger(130, random).toString(32);

    PostgreSQLDatabase.executeUpdate("ALTER ROLE \"" + dbInstanceId + "\" LOGIN password '" + passwd + "'");
    return passwd;
}

From source file:com.example.license.DESUtil.java

/**
 * ?/*from  w w  w.j  a  va  2s  .  com*/
 * 
 * @param data
 *            ?
 * @param key
 *            
 * @return ??
 */
public static String encrypt(String data, String key) throws Exception {
    Key deskey = keyGenerator(key);
    // Cipher??
    Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
    SecureRandom random = new SecureRandom();
    // ?Cipher?
    cipher.init(Cipher.ENCRYPT_MODE, deskey, random);
    byte[] results = cipher.doFinal(data.getBytes("UTF-8"));
    // http://tripledes.online-domain-tools.com/??
    for (int i = 0; i < results.length; i++) {
        System.out.print(results[i] + " ");
    }
    System.out.println();
    // ??Base64?
    return Base64.encodeBase64String(results);
}

From source file:com.andiandy.m101j.week2.hw3.SessionDAO.java

public String startSession(String username) {

    // get 32 byte random number. that's a lot of bits.
    SecureRandom generator = new SecureRandom();
    byte randomBytes[] = new byte[32];
    generator.nextBytes(randomBytes);//from w w  w .  j av  a  2 s .co  m

    String sessionID = Base64.encodeBase64(randomBytes).toString();

    // build the BSON object
    BasicDBObject session = new BasicDBObject("username", username);

    session.append("_id", sessionID);

    sessionsCollection.insert(session);

    return session.getString("_id");
}

From source file:com.billing.ng.crypto.util.HashUtils.java

/**
 * Generates a string of random alphanumeric characters of the given length. The generated salt can be
 * used to add entropy to a hashing algorithm or token generator, thus making the result harder to crack.
 *
 * @param length length of salt string to generate
 * @return salt string//from   w  w  w .j av  a  2s. c o  m
 */
public static String generateHashSalt(int length) {
    SecureRandom random = new SecureRandom();

    StringBuffer salt = new StringBuffer(length);
    for (int i = 0; i < length; i++)
        salt.append(chars[random.nextInt(chars.length)]);

    return salt.toString();
}

From source file:com.assignment4.security.SaltFilter.java

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {

    // Assume its HTTP
    HttpServletRequest httpReq = (HttpServletRequest) request;

    // Check the user session for the salt cache, if none is present we create one
    Cache<String, Boolean> csrfPreventionSaltCache = (Cache<String, Boolean>) httpReq.getSession()
            .getAttribute("csrfPreventionSaltCache");

    if (csrfPreventionSaltCache == null) {
        csrfPreventionSaltCache = CacheBuilder.newBuilder().maximumSize(5000)
                .expireAfterWrite(20, TimeUnit.MINUTES).build();

        httpReq.getSession().setAttribute("csrfPreventionSaltCache", csrfPreventionSaltCache);
    }//from w  w w .j  av a 2  s  . c o  m

    // Generate the salt and store it in the users cache
    String salt = RandomStringUtils.random(20, 0, 0, true, true, null, new SecureRandom());
    csrfPreventionSaltCache.put(salt, Boolean.TRUE);

    // Add the salt to the current request so it can be used
    // by the page rendered in this request
    httpReq.setAttribute("randId", salt);

    chain.doFilter(request, response);
}

From source file:com.boubei.tss.modules.license.LicenseFactory.java

/**
 * ???/*from  w ww  .  j  a v a 2  s  .  c om*/
 * ????hacker??license
 * @throws Exception
 */
public static void generateKey() throws Exception {
    KeyPairGenerator keyGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
    keyGen.initialize(1024, new SecureRandom());
    KeyPair pair = keyGen.generateKeyPair();
    PrivateKey priv = pair.getPrivate();
    PublicKey pub = pair.getPublic();

    log.info("?");
    DataOutputStream out = new DataOutputStream(new FileOutputStream(PUBLIC_KEY_FILE));
    out.writeBytes(EasyUtils.encodeHex(pub.getEncoded()));
    out.close();
    log.info("??" + PUBLIC_KEY_FILE);

    out = new DataOutputStream(new FileOutputStream(PRIVATE_KEY_FILE));
    out.writeBytes(EasyUtils.encodeHex(priv.getEncoded()));
    out.close();
    log.info("??" + PRIVATE_KEY_FILE);
}

From source file:com.LaunchKeyManager.http.SimpleMultipartEntity.java

public SimpleMultipartEntity() {
    final StringBuffer buf = new StringBuffer();
    final SecureRandom rand = new SecureRandom();
    for (int i = 0; i < 30; i++) {
        buf.append(MULTIPART_CHARS[rand.nextInt(MULTIPART_CHARS.length)]);
    }//from   ww  w  . jav a 2s.c  om
    this.boundary = buf.toString();

}

From source file:com.baran.file.FileOperator.java

public static String uniqueNameGenerator(String inputFile) {
    // randomization
    SecureRandom random = new SecureRandom();
    BigInteger bi = new BigInteger(130, random);
    String uniqueEncFile = String.valueOf((BigInteger) bi);

    // commons-io-2.4.jar
    String fileNameWithOutExt = FilenameUtils.removeExtension(inputFile);

    String randomFileName = System.getProperty("user.dir") + "\\" + fileNameWithOutExt + "_" + uniqueEncFile
            + ".enc";

    return randomFileName;
}

From source file:org.klnusbaum.udj.network.CustomSSLSocketFactory.java

public CustomSSLSocketFactory(KeyStore truststore)
        throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
    super(truststore);
    TrustManager[] tm = new TrustManager[] { new FullX509TrustManager() };
    sslContext.init(null, tm, new SecureRandom());
}

From source file:com.bytelightning.opensource.pokerface.HelloWorldScriptTest.java

@BeforeClass
public static void setUpBeforeClass() throws Exception {
    PrevSocketFactory = HttpsURLConnection.getDefaultSSLSocketFactory();
    PrevHostnameVerifier = HttpsURLConnection.getDefaultHostnameVerifier();

    proxy = new PokerFace();
    XMLConfiguration conf = new XMLConfiguration();
    conf.load(ProxySpecificTest.class.getResource("/HelloWorldTestConfig.xml"));
    proxy.config(conf);/*from  w w  w . j a  va2s .  c o m*/
    boolean started = proxy.start();
    Assert.assertTrue("Successful proxy start", started);

    SSLContext sc = SSLContext.getInstance("TLS");
    TrustManager[] trustAllCertificates = { new X509TrustAllManager() };
    sc.init(null, trustAllCertificates, new SecureRandom());
    HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
    HttpsURLConnection.setDefaultHostnameVerifier(new HostnameVerifier() {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true; // Just allow them all.
        }
    });

}