title: user defined counter increment function for blowfish CTR in java
body: <p>The javax crypto blowfish counter increment function seems to be fixed ( standard inc by 1? ).</p>
  
  <p>(a) How to change the increment function, say by 4?</p>
  
  <p>(b) Could "increment" be achieved by manipulating IV values?</p>
  
  <p>We could write code on top of ECB but at this moment we try to stay within java security and javax crypto without writing our own version of CTR.</p>
  
  <p>MORE INFO:</p>
  
  <p>We want our java code increments not by 1 in order to match outputs from a legacy program which doesn't increment by 1, but by another input parameter from the caller function. 
  So, increment by value other than 1 is non-standard? maybe invalid?</p>
  
  <p>Thanks in advance.</p>