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
   8         public static String generateToken(int length) {
   9                 StringBuffer token = new StringBuffer();
  10                 for (int i = 0; i < length; i++) {
  11                         int rand = sr.nextInt(26 * 2 + 10);
  12                         if (rand < 10) {
  13                                 token.append((char) ('0' + rand));
  14                                 continue;
  15                         }
  16                         rand -= 10;
  17                         if (rand < 26) {
  18                                 token.append((char) ('a' + rand));
  19                                 continue;
  20                         }
  21                         rand -= 26;
  22                         token.append((char) ('A' + rand));
  23                 }
  24                 return token.toString();
  25         }
  26 }