Issue #12833 has been updated by Dustin Mitchell.

That's exactly what I would suggest, so have at it.

It will be helpful for me if you can push new commits on top of the existing, 
rather than squashing.  It makes it easier to see what's changed for review 
purposes, and a selfish reason: I'm applying these changes to a different 
version with different patches.
----------------------------------------
Bug #12833: Password property for User type is broke in OS X 10.8
https://projects.puppetlabs.com/issues/12833#change-67770

Author: Gary Larizza
Status: In Topic Branch Pending Review
Priority: Normal
Assignee: Gary Larizza
Category: OSX
Target version: 
Affected Puppet version: 3.0.0rc3
Keywords: password user mac mountain lion os x
Branch: 
https://github.com/glarizza/puppet-1/tree/bug/master/12833_OSX_PBKDF2_UPDATE


Setting users passwords is broke in 10.8 due to the fact that Apple moved to 
PBKDF2 passwords in 10.8:


<pre>
Garys-Mac:~ glarizza$ sudo puppet resource user glarizza
Password:
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:379:in 
`get_password': undefined method `string' for nil:NilClass (NoMethodError)
        from 
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:199:in 
`generate_attribute_hash'
        from 
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:235:in 
`single_report'
        from 
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:76:in 
`instances'
        from 
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:75:in 
`collect'
        from 
/Library/Ruby/Site/1.8/puppet/provider/nameservice/directoryservice.rb:75:in 
`instances'
        from /Library/Ruby/Site/1.8/puppet/type.rb:889:in `instances'
        from /Library/Ruby/Site/1.8/puppet/type.rb:882:in `collect'
        from /Library/Ruby/Site/1.8/puppet/type.rb:882:in `instances'
        from /Library/Ruby/Site/1.8/puppet/indirector/resource/ral.rb:4:in 
`find'
        from /Library/Ruby/Site/1.8/puppet/indirector/indirection.rb:196:in 
`find'
        from /Library/Ruby/Site/1.8/puppet/application/resource.rb:222:in 
`find_or_save_resources'
        from /Library/Ruby/Site/1.8/puppet/application/resource.rb:144:in `main'
        from /Library/Ruby/Site/1.8/puppet/application.rb:317:in `run_command'
        from /Library/Ruby/Site/1.8/puppet/application.rb:309:in `run'
        from /Library/Ruby/Site/1.8/puppet/application.rb:413:in `hook'
        from /Library/Ruby/Site/1.8/puppet/application.rb:309:in `run'
        from /Library/Ruby/Site/1.8/puppet/application.rb:404:in `exit_on_fail'
        from /Library/Ruby/Site/1.8/puppet/application.rb:309:in `run'
        from /Library/Ruby/Site/1.8/puppet/util/command_line.rb:69:in `execute'
        from /usr/bin/puppet:4
</pre>

It's from this code (line 379 in 
lib/puppet/provider/nameservice/directoryservice.rb):

<pre>
          password_hash = 
converted_hash_plist['SALTED-SHA512'].string.unpack("H*")[0]
</pre>


So, I'm trying to update Puppet to be able to handle/change the user's password 
in 10.8 and I notice that the methodology I need to access/generate/change it 
has changed from 10.7 to 10.8.  Since our product uses Ruby, I'll be displaying 
the steps in Ruby.  In 10.7 I used this methodology to access the password:
 
<pre>
require 'facter/util/plist'
users_plist = Plist::parse_xml(`plutil -convert xml1 -o /dev/stdout 
/var/db/dslocal/nodes/Default/users/brit_xml.plist`)
password_hash_plist = users_plist['ShadowHashData'][0].string
IO.popen('plutil -convert xml1 -o - -', mode='r+') do |io|
  io.write password_hash_plist
  io.close_write
  @converted_plist = io.read
end


converted_hash_plist = Plist::parse_xml(@converted_plist)
password_hash = converted_hash_plist['SALTED-SHA512'].string.unpack("H*")[0]
puts password_hash
</pre>

 
This is all well and good since the value of 
converted_hash_plist['SALTED-SHA512'] was a StringIO object containing the 
binary version of the salted sha512 password.  In 10.8, all of the steps are 
the same up to a point - it seems the value of converted_hash_plist is 
different:
 
<pre>
>> pp converted_hash_plist
{"SALTED-SHA512-PBKDF2"=>
  {"salt"=>#<StringIO:0x10f31e498>,
   "entropy"=>#<StringIO:0x10f31e998>,
   "iterations"=>15174}}
=> nil
 </pre>

Indeed, this looks like a 128 byte PBKDF2 password (since the value of 
converted_hash_plist['SALTED-SHA512-PBKDF2']['entropy'].string.unpack('H*').first
 is 256 characters).  This makes sense since it looks like Apple has dabbled in 
PBKDF2 before http://people.cis.ksu.edu/~sakthi/src/data/filevault_sakthi.pdf.  
Ruby does have a PBKDF2 gem (https://github.com/emerose/pbkdf2-ruby), but of 
course there's no built-in method to handle passwords in this fashion.

Basically, the format has changed.


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