Package java.security

Examples of java.security.SecureRandom.nextInt()

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    public static String generateRandomString(int length) {
        SecureRandom randomGen = new SecureRandom();
        StringBuffer result = new StringBuffer();
        int count = 0;
        while (count < length) {
            int randomSel = randomGen.nextInt(3);
            int randomInt = randomGen.nextInt(26);
            char randomChar = '0';
            switch (randomSel) {
                case 0: randomChar = (char) (((int)'A') + randomInt); break;
                case 1: randomChar = (char) (((int)'a') + randomInt); break;
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        SecureRandom randomGen = new SecureRandom();
        StringBuffer result = new StringBuffer();
        int count = 0;
        while (count < length) {
            int randomSel = randomGen.nextInt(3);
            int randomInt = randomGen.nextInt(26);
            char randomChar = '0';
            switch (randomSel) {
                case 0: randomChar = (char) (((int)'A') + randomInt); break;
                case 1: randomChar = (char) (((int)'a') + randomInt); break;
                case 2: randomChar = (char) (((int)'0') + (randomInt % 10)); break;
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            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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            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;
               }
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               else
               {
                  drm._add(keys[pos], nodeName, "");
                  added[pos] = true;
               }
               sleepThread(random.nextInt(30));
            }
         }
         catch (Exception e)
         {
            e.printStackTrace();
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         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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        String charset = IConst.VALUES.PASSWORD_DICTIONARY;
        int length = charset.length();
        StringBuffer newpass = new StringBuffer();

        for (int i = 0; i < IConst.VALUES.DEFAULT_PASSWORD_LENGTH; i++) {
            newpass.append(charset.charAt(random.nextInt(length)));
        }

        return newpass.toString();
    }
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                       "0123456789" +
                       "0123456789" +
                       "~!@#$%^&*()_+`-=[]{}|;':,./<>?";

      for (int i = 0; i < 8; ++i)
        builder.append(p.charAt(r.nextInt(128)));
    } catch (NoSuchAlgorithmException ex) {
      Log.e(LOG_TAG, "generatePassword", ex);
    }
    return builder.toString();
  }
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     */
    public static String generateUniqueId() {
        SecureRandom prng = null;
        try {
            prng = SecureRandom.getInstance("SHA1PRNG");
            String randomNum = Integer.toString(prng.nextInt());

            MessageDigest sha = MessageDigest.getInstance("SHA-1");
            byte[] result = sha.digest(randomNum.getBytes());

            return hexEncode(result);
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      String group = this.group + "o";

      TemplateOptions options = client.templateOptions();

      options.as(EC2TemplateOptions.class).securityGroups(group);
      options.as(EC2TemplateOptions.class).clientToken(Integer.toHexString(random.nextInt(65536 * 1024)));

      String startedId = null;
      try {
         cleanupExtendedStuffInRegion(null, securityGroupClient, keyPairClient, group);

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