src/org/cacert/gigi/util/RandomToken.java

   1 package org.cacert.gigi.util;
   2
   3 import java.security.SecureRandom;
   4
   5 public class RandomToken {
   6         static SecureRandom sr = new SecureRandom();
   7         public static String generateToken(int length) {
   8                 StringBuffer token = new StringBuffer();
   9                 for (int i = 0; i < length; i++) {
  10                         int rand = sr.nextInt(26 * 2 + 10);
  11                         if (rand < 10) {
  12                                 token.append((char) ('0' + rand));
  13                                 continue;
  14                         }
  15                         rand -= 10;
  16                         if (rand < 26) {
  17                                 token.append((char) ('a' + rand));
  18                                 continue;
  19                         }
  20                         rand -= 26;
  21                         token.append((char) ('A' + rand));
  22                 }
  23                 return token.toString();
  24         }
  25 }