title: default values for salt, iteration count and key length for PBEKeySpec
body: <p><a href="http://docs.oracle.com/javase/7/docs/api/javax/crypto/spec/PBEKeySpec.html" rel="nofollow">http://docs.oracle.com/javase/7/docs/api/javax/crypto/spec/PBEKeySpec.html</a></p>
  
  <p>Per that the salt, iteration count and key length are optional parameters. What are the defaults if they're not specified?</p>
  
  <p>For algorithms with fixed key lengths the key length is easy enough to figure out but algorithms like AES can have multiple key lengths.</p>
  
  <p>Any ideas?</p>