ciderpunx

  $ echo PasSwoRd | tr 'A-Za-z' 'a-zA-Z'
  pASsWOrD

  $ echo PasSwoRd | tr 'A-Za-z' 'a-zA-Z' | sha256sum > db

  $ echo PasSwoRd | sha256sum > sum1
  $ echo PasSwoRd | tr 'A-Za-z' 'a-zA-Z' | sha256sum > sum2
  $ diff -q db sum1
  Files db and sum1 differ # i.e. LOGIN FAILS
  $ diff -q db sum2
  $ # i.e. LOGIN SUCCEEDS

  > no one ever has to know what feeds you subscribe to.

  > Certain structures,  constants  and  system  calls  below 
  > are   private   to   the   DOS    and    are    extremely 
  > version-dependent.  They  may  change  at any time at the 
  > implementors' whim.