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.alibaba.citrus.service.requestcontext.session.idgen.random.impl.RandomIDGenerator.java

@Override
protected void init() {
    length = defaultIfNull(length, SESSION_ID_LENGTH_DEFAULT);

    try {//from w  w w  .jav  a 2  s.c o m
        rnd = new SecureRandom();
    } catch (Throwable e) {
        rnd = new Random();
    }
}

From source file:com.aqnote.shared.cryptology.asymmetric.DSA.java

public static KeyPair genKeyPair(int bit) {
    try {/*  ww  w  .  j  a v a2  s .  co  m*/
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(ALGORITHM, JCE_PROVIDER);
        keyPairGen.initialize(bit, new SecureRandom());
        return keyPairGen.generateKeyPair();
    } catch (NoSuchAlgorithmException e) {
        e.printStackTrace();
    } catch (NoSuchProviderException e) {
        e.printStackTrace();
    }
    return null;
}

From source file:com.liusoft.dlog4j.upgrade.StringUtils.java

/**
 * //  w  w w .ja  v a2  s  .co  m
 * @param src ??
 * @param key 8?
 * @return     ??
 * @throws Exception
 */
public static byte[] encrypt(byte[] src, byte[] key) throws Exception {
    //      DES????
    SecureRandom sr = new SecureRandom();
    // ?DESKeySpec
    DESKeySpec dks = new DESKeySpec(key);
    // ?DESKeySpec??
    // SecretKey
    SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES);
    SecretKey securekey = keyFactory.generateSecret(dks);
    // Cipher??
    Cipher cipher = Cipher.getInstance(DES);
    // ?Cipher
    cipher.init(Cipher.ENCRYPT_MODE, securekey, sr);
    // ??
    // ??
    return cipher.doFinal(src);
}

From source file:com.hurence.logisland.util.string.Anonymizer.java

public Anonymizer() {
    random = new SecureRandom();
    salt = new byte[SALT_BYTE_SIZE];

    timeSalt = random.nextInt(1000000000) + 1000000000;
    random.nextBytes(salt);//from ww w . j  a v a2 s. co m
}

From source file:ece356.UserDBAO.java

private static String generateSalt() {
    SecureRandom random = new SecureRandom();
    byte bytes[] = new byte[20];
    random.nextBytes(bytes);//from   ww  w  .j  a va2 s .  co  m
    return org.apache.commons.codec.binary.Base64.encodeBase64String(bytes);
}

From source file:com.kspichale.kundera.course.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 . c  o m*/

    BASE64Encoder encoder = new BASE64Encoder();

    String sessionID = encoder.encode(randomBytes);

    // 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.qut.middleware.esoemanager.util.PolicyIDGenerator.java

public PolicyIDGenerator() {
    this.lock = new ReentrantLock();

    try {/*from  ww w. j  av  a  2s.c  o  m*/
        /* Attempt to get the specified RNG instance */
        this.random = SecureRandom.getInstance(this.RNG);
    } catch (NoSuchAlgorithmException nsae) {
        this.logger.error(Messages.getString("IdentifierGeneratorImpl.13")); //$NON-NLS-1$
        this.logger.debug(nsae.getLocalizedMessage(), nsae);
        this.random = new SecureRandom();
    }

    this.random.setSeed(System.currentTimeMillis());
}

From source file:es.logongas.openshift.ant.JenkinsPasswordHashPropertyTask.java

/**
 * The MIT License//from  w  w w  .j  a va2s.  com
 * 
 * Copyright (c) 2004-2010, Sun Microsystems, Inc., Kohsuke Kawaguchi, David Calavera, Seiji Sogabe
 * Generates random salt.
 */
private String generateSalt() {
    StringBuilder buf = new StringBuilder();
    SecureRandom sr = new SecureRandom();
    for (int i = 0; i < 6; i++) {// log2(52^6)=34.20... so, this is about 32bit strong.
        boolean upper = sr.nextBoolean();
        char ch = (char) (sr.nextInt(26) + 'a');
        if (upper) {
            ch = Character.toUpperCase(ch);
        }
        buf.append(ch);
    }
    return buf.toString();
}

From source file:springmvc.service.PersonServiceImpl.java

public String generate() {
    SecureRandom random = new SecureRandom();
    String pw = new BigInteger(130, random).toString(32);
    return pw.substring(0, 10);

}

From source file:com.liferay.util.Encryptor.java

public static Key generateKey(String algorithm) throws EncryptorException {
    try {/*w w  w  .  j  a v a 2s.  c  o  m*/
        Security.addProvider(getProvider());

        KeyGenerator generator = KeyGenerator.getInstance(algorithm);
        generator.init(56, new SecureRandom());

        Key key = generator.generateKey();

        return key;
    } catch (Exception e) {
        throw new EncryptorException(e);
    }
}