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 random = randoms.poll();
        if (random == null) {
            random = createSecureRandom();
        }
        random.nextBytes(bytes);
        randoms.add(random);
    }




    /**

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            rng = new SecureRandom();
        }


        // use 48 bits for strength and fill them in
        byte[] randomBytes = new byte[6];
        rng.nextBytes(randomBytes);


        // convert to a long
        return new BigInteger(randomBytes).longValue();
    }

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     */
    protected byte[] generateEphemeralKey() throws WSSecurityException {
        try {
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] temp = new byte[16];
            random.nextBytes(temp);
            return temp;
        } catch (Exception e) {
            throw new WSSecurityException(
                    "Error in creating the ephemeral key", e);
        }

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     */
    public static byte[] generateNonce(int length) throws WSSecurityException {
        try {
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] temp = new byte[length];
            random.nextBytes(temp);
            return temp;
        } catch (Exception e) {
            throw new WSSecurityException(
                    "Error in generating nonce of length " + length, e);
        }

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     */
    public static byte[] generateNonce(int length) throws WSSecurityException {
        try {
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] temp = new byte[length];
            random.nextBytes(temp);
            return temp;
        } catch (Exception e) {
            throw new WSSecurityException(
                    "Error in generating nonce of length " + length, e);
        }

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            }
        } else {
            SecureRandom random = new SecureRandom();
            random.setSeed(System.currentTimeMillis());
            byte[] bytes = new byte[16];
            random.nextBytes(bytes);
            spec = new SecretKeySpec(bytes, "AES");
            File dir = location.getParentFile();
            if (!dir.exists()) {
                dir.mkdirs();
            }

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     */
    protected byte[] generateEphemeralKey() throws WSSecurityException {
        try {
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] temp = new byte[this.keySize / 8];
            random.nextBytes(temp);
            return temp;
        } catch (Exception e) {
            throw new WSSecurityException(
                    "Error in creating the ephemeral key", e);
        }

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        SecureRandom secRan = new SecureRandom();


        // generation of initial seeds
        for (int i = 0; i < numLayer; i++)
        {
            secRan.nextBytes(currentSeeds[i]);
            gmssRandom.nextSeed(currentSeeds[i]);
        }


        this.initialized = true;
    }

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        byte[] securedata = null;
        try {
            // Generate IV
            SecureRandom rand = new SecureRandom();
            byte[] iv = new byte[16];
            rand.nextBytes(iv);
            IvParameterSpec ivspec = new IvParameterSpec(iv);
            Cipher encryptCipher = Cipher.getInstance(CIPHER_CODE);
            encryptCipher.init(Cipher.ENCRYPT_MODE, sk, ivspec);
            encryptMac.update(iv);
            // encrypt the plaintext

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            }
            else
            {
                // generate random IV and write to stream
                SecureRandom rnd = new SecureRandom();
                rnd.nextBytes(iv);
                output.write(iv);
            }


            Cipher cipher;
            try

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