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.

            WSSecSecurityContextToken sctBuilder = new WSSecSecurityContextToken();
            sctBuilder.prepare(doc, crypto);


            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] tempSecret = new byte[16];
            random.nextBytes(tempSecret);


            // Store the secret
            this.secrets.put(sctBuilder.getIdentifier(), tempSecret);


            String tokenId = sctBuilder.getSctId();

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     * @return The cnonce value as String.
     */
    public static String createCnonce() {
        final SecureRandom rnd = new SecureRandom();
        final byte[] tmp = new byte[8];
        rnd.nextBytes(tmp);
        return encode(tmp);
    }


    @Override
    public String toString() {

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    // Do some of our dummy operations
    byte[] seed = new byte[1];
    seed[0] = 42;
    sr.setSeed(seed);
    byte[] random = new byte[1];
    sr.nextBytes(random);
    harness.check(random[0], (byte)42);
  }


  public void test (TestHarness h)
  {

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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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    {
      numberGenerator = ng = new SecureRandom();
    }


    byte[] randomBytes = new byte[16];
    ng.nextBytes(randomBytes);
    randomBytes[6] &= 0x0f; /* clear version */
    randomBytes[6] |= 0x40; /* set to version 4 */
    randomBytes[8] &= 0x3f; /* clear variant */
    randomBytes[8] |= 0x80; /* set to IETF variant */

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

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                                          String algo,
                                          int keySize) throws TrustException {
        try {
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            byte[] temp = new byte[keySize / 8];
            random.nextBytes(temp);
            return temp;
        } catch (Exception e) {
            throw new TrustException("Error in creating the ephemeral key", e);
        }
    }

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

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        // Serialnumber is random bits, where random generator is initialized with Date.getTime() when this
        // bean is created.
        byte[] serno = new byte[8];
        SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
        random.setSeed(new Date().getTime());
        random.nextBytes(serno);
        certgen.setSerialNumber(new java.math.BigInteger(serno).abs());
        certgen.setNotBefore(firstDate);
        certgen.setNotAfter(lastDate);
        certgen.setSignatureAlgorithm(sigAlg);
        certgen.setSubjectDN(CertTools.stringToBcX509Name(dn));

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      this.certChain = certs!=null ? Arrays.asList(certs).toArray(new X509Certificate[0]) : null;
        this.nonce = new byte[16];
      {
          final Hashtable exts = new Hashtable();
          final SecureRandom randomSource = SecureRandom.getInstance("SHA1PRNG");
          randomSource.nextBytes(nonce);
          final X509Extension nonceext = new X509Extension(false, new DEROctetString(nonce));
          exts.put(OCSPObjectIdentifiers.id_pkix_ocsp_nonce, nonceext);
          // Don't bother adding Unid extension if we are not using client authentication
          if ( getfnr ) {
              X509Extension ext = new X509Extension(false, new DEROctetString(new FnrFromUnidExtension("1")));

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