[Fedora-directory-devel] Please Review: (207893) importing users with crypted passwords results in a AD->DS sync loop

[Nathan Kinder]

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=207893
Resolves: bug 207893
Bug Description: Adding a pre-hashed password to DS when using Windows 
Password
  Syncronization will trigger a loop condition of password updates.  The 
DS will
  send the hashed password to AD, which thinks it's clear-text.  AD 
stores the
  password, attempts to bind to DS using the hash (which of course 
fails), so it
  sends the hashed password back to DS.  This goes round and round.
Reviewed by: ???
Files: see diff
Branch: HEAD
Fix Description: This fix first checks if there is a password storage 
scheme at
  the beginning of the userpassword attribute value before syncing it.  
If there
  is a storage scheme present, a message is logged at the replication 
logging level
  that this hashed password is being skipped instead of just trying to 
sync it.

  If someone adds a password with the clear prefix on it to DS (such as
  "{clear}secret"), we will detect that and strip off the "{clear}" 
prefix before
  sending it to AD.  All other passwords that start with the "{" 
character and
  contain the "}" character somewhere else in the password will be 
considered to
  be already hashed.
Platforms tested: FC6 & Windows 2003 Server
Flag Day: no
Doc impact: no
https://bugzilla.redhat.com/bugzilla/attachment.cgi?id=172462&action=diff
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