howto change master key enctype from des to triple-des

[Subu Ayyagari]

* I created kerberos database (3 years ago)
  with kerberos master key (K/M) enc type 
  set to dec-cbc-crc32.

  Now i want to change it to 'triple des'.
  AND
  I also want to change enctype for all principals
  in the database to triple des.

What is the process to change enctypes?
Is there a neat migration module that will 
accomplish this?

One thing i wish to avoid is to recreate the 
entire database and reissue principals.

thanks
-subu
email: sva892 at yahoo.com


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