Examples of SecureRandom

com.googlecode.gwt.crypto.util.SecureRandom
com.zaranux.client.crypto.SecureRandom
nist.gov/cryptval/140-2.htm"> FIPS 140-2, Security Requirements for Cryptographic Modules, section 4.9.1. Additionally, SecureRandom must produce non-deterministic output. Therefore any seed material passed to a SecureRandom object must be unpredictable, and all SecureRandom output sequences must be cryptographically strong, as described in RFC 1750: Randomness Recommendations for Security.
A caller obtains a SecureRandom instance via the no-argument constructor or one of the getInstance methods:
```
 SecureRandom random = new SecureRandom(); 
```
Many SecureRandom implementations are in the form of a pseudo-random number generator (PRNG), which means they use a deterministic algorithm to produce a pseudo-random sequence from a true random seed. Other implementations may produce true random numbers, and yet others may use a combination of both techniques.
Typical callers of SecureRandom invoke the following methods to retrieve random bytes:
```
 SecureRandom random = new SecureRandom(); byte bytes[] = new byte[20]; random.nextBytes(bytes); 
```
Callers may also invoke the generateSeed method to generate a given number of seed bytes (to seed other random number generators, for example):
```
 byte seed[] = random.generateSeed(20); 
```
Note: Depending on the implementation, the generateSeed and nextBytes methods may block as entropy is being gathered, for example, if they need to read from /dev/random on various unix-like operating systems. @see java.security.SecureRandomSpi @see java.util.Random @author Benjamin Renaud @author Josh Bloch
java.security.SecureRandom
nist.gov/cryptval/140-2.htm"> FIPS 140-2, Security Requirements for Cryptographic Modules, section 4.9.1. Additionally, SecureRandom must produce non-deterministic output. Therefore any seed material passed to a SecureRandom object must be unpredictable, and all SecureRandom output sequences must be cryptographically strong, as described in RFC 1750: Randomness Recommendations for Security.
A caller obtains a SecureRandom instance via the no-argument constructor or one of the getInstance methods:
```
 SecureRandom random = new SecureRandom(); 
```
Many SecureRandom implementations are in the form of a pseudo-random number generator (PRNG), which means they use a deterministic algorithm to produce a pseudo-random sequence from a true random seed. Other implementations may produce true random numbers, and yet others may use a combination of both techniques.
Typical callers of SecureRandom invoke the following methods to retrieve random bytes:
```
 SecureRandom random = new SecureRandom(); byte bytes[] = new byte[20]; random.nextBytes(bytes); 
```
Callers may also invoke the generateSeed method to generate a given number of seed bytes (to seed other random number generators, for example):
```
 byte seed[] = random.generateSeed(20); 
```
@see java.security.SecureRandomSpi @see java.util.Random @version 1.54, 04/21/06 @author Benjamin Renaud @author Josh Bloch

Examples of java.security.SecureRandom

      byte[] kbytes = key.getEncoded();
      System.out.println("key.Algorithm = "+key.getAlgorithm());
      System.out.println("key.Format = "+key.getFormat());
      System.out.println("key.Encoded Size = "+kbytes.length);
      
      SecureRandom rnd = SecureRandom.getInstance("SHA1PRNG");
      BigInteger bi = new BigInteger(320, rnd);
      byte[] k2bytes = bi.toByteArray();
      SecretKeySpec keySpec = new SecretKeySpec(k2bytes, "Blowfish");
      System.out.println("key2.Algorithm = "+key.getAlgorithm());
      System.out.println("key2.Format = "+key.getFormat());

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Examples of java.security.SecureRandom

         drm.startService();
         
         CachingListener listener = new CachingListener();
         drm.registerListener("TEST", listener);
         
         SecureRandom random = new SecureRandom();
         boolean[] added = new boolean[nodes.length];
         List lookup = null;
         for (int i = 0; i < 10; i++)
         {
            int node = random.nextInt(nodes.length);
            if (added[node])
            {
               if (node == 2)
                  drm.remove("TEST");
               else

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Examples of java.security.SecureRandom

         drm.startService();
         
         CachingListener listener = new CachingListener();
         drm.registerListener("TEST", listener);
         
         SecureRandom random = new SecureRandom();
         boolean[] added = new boolean[nodes.length];
         List lookup = null;
         List<ClusterNode> lookupReplicantsNodes = null;
         for (int i = 0; i < 10; i++)
         {
            int node = random.nextInt(nodes.length);
            if (added[node])
            {
               if (node == 2)
                  drm.remove("TEST");
               else

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Examples of java.security.SecureRandom

         try
         {
            acquired = semaphore.attempt(60000);
            if (!acquired)
               throw new Exception("Cannot acquire semaphore");
            SecureRandom random = new SecureRandom();
            for (count = 0; count < LOOP_COUNT; count++)
            {
               deployer.deploy(key, "JGroups", listener);


               sleepThread(random.nextInt(50));
               deployer.undeploy(key, listener);
            }
         }
         catch (Exception e)
         {

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Examples of java.security.SecureRandom

         {
            acquired = semaphore.attempt(60000);
            if (!acquired)
               throw new Exception("Cannot acquire semaphore");
            boolean[] added = new boolean[keys.length];
            SecureRandom random = new SecureRandom();
            
            for (count = 0; count < weightFactor * LOOP_COUNT; count++)
            {
               int pos = random.nextInt(keys.length);
               if (added[pos])
               {
                  drm._remove(keys[pos], nodeName);
                  added[pos] = false;
               }
               else
               {
                  drm._add(keys[pos], nodeName, "");
                  added[pos] = true;
               }
               sleepThread(random.nextInt(30));
            }
         }
         catch (Exception e)
         {
            e.printStackTrace();

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Examples of java.security.SecureRandom

   * @return  an encoded salt value
   */
  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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Examples of java.security.SecureRandom

      }
      keepAliveHdrParams = "timeout=" + timeoutKeepAliveSec + ", max=" + maxAliveConnUse;


      expiredIn = arguments.get(ARG_SESSION_TIMEOUT) != null ? ((Integer) arguments.get(ARG_SESSION_TIMEOUT))
              .intValue() : DEF_SESSION_TIMEOUT;
      srandom = new SecureRandom((arguments.get(ARG_SESSION_SEED) == null ? "TJWS" + new Date() : (String) arguments.get(ARG_SESSION_SEED)).getBytes());
      try
      {
         gzipInStreamConstr = Class.forName("java.util.zip.GZIPInputStream").getConstructor(new Class[]{InputStream.class});
      }
      catch (ClassNotFoundException cne)

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Examples of java.security.SecureRandom

   * hashing to apply - the work factor therefore increases as
   * 2**log_rounds.
   * @return  an encoded salt value
   */
  public static String gensalt(int log_rounds) {
    return gensalt(log_rounds, new SecureRandom());
  }

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Examples of java.security.SecureRandom

           
            //SecureRandom random = SecureRandom.getInstance("SHA1PRNG",
            // "SUN");
            //initialize(int keysize, SecureRandom random)


            generator.initialize(SOSKeyGenerator.keyLenght, new SecureRandom());
            //generator.initialize(this.keyLenght);


            KeyPair keys = generator.generateKeyPair();


            return keys;

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Examples of java.security.SecureRandom

  @SuppressWarnings("unchecked")
  private ResourceManager() {
    // resources = new HashMap<String, IResource>();
    resources = new ReferenceMap(AbstractReferenceMap.SOFT,
        AbstractReferenceMap.SOFT, true);
    random = new SecureRandom();
  }

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