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:com.cfs.util.AESCriptografia.java

public String gerarChaveRandomica() {
    String chave = null;/*w w  w  .  j av a2s  .c  o  m*/
    try {
        /* Cria o gerador de chaves */
        KeyGenerator keygen = KeyGenerator.getInstance("AES");
        /* Inicializa o gerador de chaves */
        SecureRandom random = new SecureRandom();
        keygen.init(random);
        /* Cria uma chave */
        SecretKey key = keygen.generateKey();
        /* Captura a chave na forma de bytes */
        byte[] buffer = key.getEncoded();
        /* Codifica a chave gerada */
        byte[] chaveGerada = Base64.encodeBase64(buffer);
        /* Converte a chave para texto */
        chave = new String(chaveGerada, "UTF-8");
    } catch (Exception e) {
        e.printStackTrace();
    }
    /* Retorna a chave */
    return chave;
}

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From source file:ch.itemis.xdocker.lib.TestDockerClient.java

@Test
public void execStart() throws Exception {
    String containerName = "generated_serano" + new SecureRandom().nextInt();
    CreateContainerResponse container = dockerClient.createContainerCmd("busybox").withCmd("ls")
            .withName(containerName).exec();
    assertNotNull(container);//from w  w  w .  java2s. c o  m
    assertNotNull(container.getId());

    InputStream response = dockerClient.execStartCmd(container.getId()).exec(null);
    assertNotNull(response);

    List<String> res = IOUtils.readLines(response);
    for (String string : res) {
        System.out.println(string);
    }
}

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From source file:org.sample.TimeController.java

@RequestMapping(method = RequestMethod.GET, value = { "/tick" })
public ModelAndView get() throws Exception {
    Connection connection = jmsFactory.createConnection();
    Session jmsSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
    SecureRandom srandom = new SecureRandom();
    String rand = new BigInteger(176, srandom).toString(32);
    String q = Long.toString(System.currentTimeMillis()) + "-" + rand;
    Destination destination = jmsSession.createQueue(q);

    Timer timer = new Timer();
    long delay = 1 * 1000;
    timer.schedule(new TickTask(jmsSession, destination), 0, delay);

    ModelAndView mav = new ModelAndView("client");
    mav.addObject("queue", destination.toString());
    return mav;//w w w .  ja  v a 2  s .c o  m
}

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From source file:com.zimbra.cs.account.TrustedTokenKey.java

TrustedTokenKey(long version, byte[] key) throws ServiceException {
    mVersion = version;//from   w  w  w .  ja  v  a  2 s .  co  m
    mCreated = System.currentTimeMillis();
    if (key != null) {
        mKey = key;
    } else {
        SecureRandom random = new SecureRandom();
        mKey = new byte[KEY_SIZE_BYTES];
        random.nextBytes(mKey);
    }
}

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From source file:client.lib.Client.java

public Client() throws NoSuchAlgorithmException, KeyManagementException {
    TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
        public X509Certificate[] getAcceptedIssuers() {
            X509Certificate[] myTrustedAnchors = new X509Certificate[0];
            return myTrustedAnchors;
        }/* www  .  j ava 2  s .c  om*/

        @Override
        public void checkClientTrusted(X509Certificate[] certs, String authType) {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] certs, String authType) {
        }
    } };

    SSLContext sslContext = SSLContext.getInstance("SSL");
    sslContext.init(null, trustAllCerts, new SecureRandom());

    // Create an ssl socket factory with our all-trusting manager
    final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();

    http2Client = new OkHttpClient();
    http2Client.setSslSocketFactory(sslSocketFactory);
    http2Client.setHostnameVerifier(new HostnameVerifier() {
        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    });

    httpClient = http2Client.clone();

    httpClient.setProtocols(Arrays.asList(Protocol.HTTP_1_1));
    http2Client.setProtocols(Arrays.asList(Protocol.HTTP_2));
}

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From source file:RSA.java

/** Generate a new public and private key set. */
public synchronized void generateKeys() {
    SecureRandom r = new SecureRandom();
    BigInteger p = new BigInteger(bitlen / 2, 100, r);
    BigInteger q = new BigInteger(bitlen / 2, 100, r);
    n = p.multiply(q);/*ww w. j a  v a2s.com*/
    BigInteger m = (p.subtract(BigInteger.ONE)).multiply(q.subtract(BigInteger.ONE));
    e = new BigInteger("3");
    while (m.gcd(e).intValue() > 1) {
        e = e.add(new BigInteger("2"));
    }
    d = e.modInverse(m);
}

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From source file:com.cloud.utils.crypt.RSAHelper.java

public static String encryptWithSSHPublicKey(String sshPublicKey, String content) {
    String returnString = null;//www .  java  2  s  .  co  m
    try {
        RSAPublicKey publicKey = readKey(sshPublicKey);
        Cipher cipher = Cipher.getInstance("RSA/None/PKCS1Padding", BouncyCastleProvider.PROVIDER_NAME);
        cipher.init(Cipher.ENCRYPT_MODE, publicKey, new SecureRandom());
        byte[] encrypted = cipher.doFinal(content.getBytes());
        returnString = Base64.encodeBase64String(encrypted);
    } catch (Exception e) {
    }

    return returnString;
}

---

From source file:com.zimbra.cs.account.ExtAuthTokenKey.java

ExtAuthTokenKey(long version, byte[] key) throws ServiceException {
    this.version = version;
    created = System.currentTimeMillis();
    if (key != null) {
        this.key = key;
    } else {//from ww  w .  j  a  v  a 2 s  .  co m
        SecureRandom random = new SecureRandom();
        this.key = new byte[KEY_SIZE_BYTES];
        random.nextBytes(this.key);
    }
}

---

From source file:com.voa.weixin.utils.HttpUtils.java

/**
 * httpspost?//from   ww w . j  av  a 2 s . com
 * 
 * @param url
 * @param param
 * @return
 * @throws Exception
 */
private static String doHttps(String url, String param, String method) throws Exception {
    HttpsURLConnection conn = null;
    OutputStream out = null;
    String rsp = null;
    byte[] content = param.getBytes("utf-8");
    try {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            ctx.init(new KeyManager[0], new TrustManager[] { new DefaultTrustManager() }, new SecureRandom());
            SSLContext.setDefault(ctx);

            conn = getConnection(new URL(url), method, ctype);
            conn.setHostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });
            conn.setConnectTimeout(60000);
            conn.setReadTimeout(60000);
        } catch (Exception e) {
            throw e;
        }
        try {
            out = conn.getOutputStream();
            if (StringUtils.isNotBlank(param))
                out.write(content);
            rsp = getResponseAsString(conn);
        } catch (IOException e) {
            throw e;
        }

    } finally {
        if (out != null) {
            out.close();
        }
        if (conn != null) {
            conn.disconnect();
        }
    }

    return rsp;
}

---

From source file:net.jarcec.sqoop.data.gen.mr.GeneratorMapper.java

@Override
protected void map(LongWritable key, LongWritable value, Context context)
        throws IOException, InterruptedException {
    long from = key.get();
    long to = value.get();

    random = new SecureRandom();
    decimal = new DecimalFormat("###.###");
    date = new SimpleDateFormat("yyyy-MM-dd");
    time = new SimpleDateFormat("HH:mm:ss");
    datetime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

    String[] types = context.getConfiguration().get(Constants.TYPES).split(",");
    String[] values = new String[types.length];

    for (long i = from; i < to; i++) {
        context.progress();/*from   www. ja va 2s  . c o  m*/

        int y = 0;
        for (String type : types) {

            if ("id".equals(type)) {
                values[y] = String.valueOf(i);
            } else if ("s50".equals(type)) {
                values[y] = generateString(50);
            } else if ("i".equals(type)) {
                values[y] = generateInteger();
            } else if ("f".equals(type)) {
                values[y] = generateFloat(250, 31);
            } else if ("d".equals(type)) {
                values[y] = generateDate();
            } else if ("t".equals(type)) {
                values[y] = generateTime();
            } else if ("dt".equals(type)) {
                values[y] = generateDateTime();
            } else if ("s255".equals(type)) {
                values[y] = generateString(255);
            } else {
                throw new RuntimeException("Unknown type: " + type);
            }

            y++;
        }

        context.write(new Text(StringUtils.join(values, ",")), NullWritable.get());
    }
}

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