Examples of java.security.SecureRandom.nextBytes()

java.security.SecureRandom.nextBytes()
Generates a user-specified number of random bytes.
If a call to setSeed had not occurred previously, the first call to this method forces this SecureRandom object to seed itself. This self-seeding will not occur if setSeed was previously called. @param bytes the array to be filled in with random bytes.

        SecureRandom ng=numberGenerator;
        if(ng == null)
            numberGenerator=ng=new SecureRandom();


        byte[] randomBytes=new byte[16];
        ng.nextBytes(randomBytes);
        return randomBytes;
    }


    public int size() {
        int retval=super.size() + Global.BYTE_SIZE;

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        SecureRandom ng=numberGenerator;
        if(ng == null)
            numberGenerator=ng=new SecureRandom();


        byte[] randomBytes=new byte[16];
        ng.nextBytes(randomBytes);
        return new UUID(randomBytes);
    }




    public long getLeastSignificantBits() {

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        SecureRandom ng=numberGenerator;
        if(ng == null)
            numberGenerator=ng=new SecureRandom();


        byte[] randomBytes=new byte[16];
        ng.nextBytes(randomBytes);
        return randomBytes;
    }


    public int size() {
        int retval=super.size() + Global.BYTE_SIZE;

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        SecureRandom ng=numberGenerator;
        if(ng == null)
            numberGenerator=ng=new SecureRandom();


        byte[] randomBytes=new byte[16];
        ng.nextBytes(randomBytes);
        return randomBytes;
    }


    protected String printDetails() {
        StringBuilder sb=new StringBuilder();

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            len = 1;
        }
        byte[] buff = new byte[len];
        SecureRandom sr = getSecureRandom();
        synchronized (sr) {
            sr.nextBytes(buff);
        }
        return buff;
    }


    /**

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        final byte[] rawSign = sig.sign();
        
        final byte[] pad = new byte[random.nextInt(32)];
        
        random.nextBytes(pad);
        
        putBytes( buffer, rawMyPubkey, 65535 );
        
        putBytes( buffer, rawEphemeralPubkey, 65535 );

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          throw( new CryptoManagerException( "phase error: keys not received" ));
        }
        
        final byte[] IV = new byte[20 + random.nextInt(32)];
        
        random.nextBytes(IV);


        sig.update(IV);
        
        sig.update(sharedSecret);

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    byte[] nonce = new byte[(nbBits / 16) + 1];


    SecureRandom rand;
    try {
      rand = SecureRandom.getInstance("SHA1PRNG");
      rand.nextBytes(nonce);
    } catch (Exception ex) {
      System.err.println("Can't happen...");
      ex.printStackTrace();
    }

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  public static String gensalt(int log_rounds) {
    StringBuffer rs = new StringBuffer();
    byte rnd[] = new byte[BCRYPT_SALT_LEN];
    SecureRandom random = new SecureRandom();


    random.nextBytes(rnd);


    rs.append("$2a$");
    if (log_rounds < 10)
      rs.append("0");
    rs.append(Integer.toString(log_rounds));

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        final SecureRandom rnd = new SecureRandom();
        final ISqlJetTable t = db.getTable("t");
        final byte[] blob = new byte[1024 + 4096];


        rnd.nextBytes(blob);


        db.runWriteTransaction(new ISqlJetTransaction() {
            public Object run(SqlJetDb db) throws SqlJetException {


                try {

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