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:Main.java

/**
 * Get the library-wide random number generator. This method is synchronized so that multiple accesses to the
 * generator when a generator is not yet set will not throw an UnsupportedOperationException
 * @return the random number generator set in {@link #setRandom(Random)} or (by default) a SecureRandom
 *///  w ww  .  j av a  2s. co m
public static synchronized Random getRandom() {
    if (randomNumberGenerator_ == null) {
        setRandom(new SecureRandom());
    }
    return randomNumberGenerator_;
}

From source file:org.beangle.security.codec.DESEncrypt.java

public byte[] doEncrypt(byte plainText[]) throws Exception {
    SecureRandom sr = new SecureRandom();
    byte rawKeyData[] = desKey;
    DESKeySpec dks = new DESKeySpec(rawKeyData);
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
    javax.crypto.SecretKey key = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance("DES");
    cipher.init(1, key, sr);//from www.  j  a  v a2 s.  c  o m
    byte data[] = plainText;
    byte encryptedData[] = cipher.doFinal(data);
    return encryptedData;
}

From source file:com.apabi.r2k.common.security.util.NonceUtils.java

/**
 * SecureRandom?, Hex?./*from   w ww . j  a va  2 s.co m*/
 * 
 * @param length ,?.
 */
public static String randomHexString(final int length) {
    SecureRandom nonceGenerator = new SecureRandom();
    byte[] nonce = new byte[length / 2];
    nonceGenerator.nextBytes(nonce);
    return Hex.encodeHexString(nonce);
}

From source file:com.platform.common.utils.security.NonceUtils.java

/**
 * SecureRandom?, Hex?./*from  www. j  a v a  2 s  . co  m*/
 * 
 * @param length ,?.
 */
public static String randomHexString(int length) {
    SecureRandom nonceGenerator = new SecureRandom();
    byte[] nonce = new byte[length / 2];
    nonceGenerator.nextBytes(nonce);
    return Hex.encodeHexString(nonce);
}

From source file:com.predic8.membrane.core.interceptor.registration.SecurityUtils.java

static String createPasswdCompatibleHash(String password)
        throws UnsupportedEncodingException, NoSuchAlgorithmException {
    byte[] salt = new byte[128];
    new SecureRandom().nextBytes(salt);

    String saltString = Base64.encodeBase64String(salt);
    if (saltString.length() > 16)
        saltString = saltString.substring(0, 16);

    return createPasswdCompatibleHash(password, saltString);
}

From source file:Main.java

public static SSLSocketFactory setCertificates(InputStream... certificates) {
    try {/* www  .  j a v a  2 s . c  o m*/
        CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
        KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
        keyStore.load(null);
        int index = 0;
        for (InputStream certificate : certificates) {
            String certificateAlias = Integer.toString(index++);
            keyStore.setCertificateEntry(certificateAlias, certificateFactory.generateCertificate(certificate));
            try {
                if (certificate != null)
                    certificate.close();
            } catch (IOException e) {
            }
        }
        SSLContext sslContext = SSLContext.getInstance("TLS");
        TrustManagerFactory trustManagerFactory = TrustManagerFactory
                .getInstance(TrustManagerFactory.getDefaultAlgorithm());
        trustManagerFactory.init(keyStore);
        sslContext.init(null, trustManagerFactory.getTrustManagers(), new SecureRandom());
        socketFactory = sslContext.getSocketFactory();

    } catch (Exception e) {
        e.printStackTrace();
    }
    return socketFactory;
}

From source file:filters.SaltingPasswordFilter.java

@Override
public String executePreProcessing(String request) {
    final Random r = new SecureRandom();
    byte[] salt = new byte[32];
    r.nextBytes(salt);/*from   w  w  w .j  a  va 2  s.co  m*/
    byte[] encodedSalt = Base64.encodeBase64(salt);
    String saltString = new String(encodedSalt);
    request = request.concat(saltString);
    return request;
}

From source file:Main.java

private static byte[] doFinal(String key, int opmode, byte[] input)
        throws InvalidKeyException, NoSuchAlgorithmException, InvalidKeySpecException, NoSuchPaddingException,
        IllegalBlockSizeException, BadPaddingException {
    key = checkNull(key) ? DEFAULT_KEY : key;
    if (checkNull(key)) {
        return null;
    }//from   www.j a v  a 2s  .  co m
    SecureRandom sr = new SecureRandom();
    DESKeySpec dks = new DESKeySpec(key.getBytes());
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    Cipher cipher = Cipher.getInstance(MODE);
    cipher.init(opmode, securekey, sr);
    return cipher.doFinal(input);
}

From source file:com.ec2box.manage.util.EncryptionUtil.java

/**
 * generate salt for hash// www. j  a  v a  2s .  c o m
 *
 * @return salt
 */
public static String generateSalt() {
    byte[] salt = new byte[32];
    SecureRandom secureRandom = new SecureRandom();
    secureRandom.nextBytes(salt);
    return new String(Base64.encodeBase64(salt));
}

From source file:ru.org.linux.csrf.CSRFProtectionService.java

public static void generateCSRFCookie(HttpServletRequest request, HttpServletResponse response) {
    SecureRandom random = new SecureRandom();

    byte[] value = new byte[16];
    random.nextBytes(value);//from  w  ww.j  a v  a  2  s .  c o m

    String token = new String(Base64.encodeBase64(value));

    Cookie cookie = new Cookie(CSRF_COOKIE, token);
    cookie.setMaxAge(TWO_YEARS);
    cookie.setPath("/");
    response.addCookie(cookie);

    request.setAttribute(CSRF_ATTRIBUTE, token);
}