Beefy Boxes and Bandwidth Generously Provided by pair Networks
Syntactic Confectionery Delight
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

After trying to figure out how my lowly little perl application could request a Very Important Password from coworkers in a secure manner befitting the importance of said password, a few monks on the CB suggested using a file (mode u=r,go= - aka 0400) or prompting. Obviously insecure methods such as command line parameters and environment variables were not suggested. Then someone suggested encrypting the file and only asking for the password to decrypt it - which is better in the sense that it makes it much less tempting to "accidentally" see a coworker's password on a shared box (since we often have root access for development purposes, nevermind the IT folks who actually administer some of these machines), but worse in that every time the command is run and we need the password we'll need to ask for the encryption password, negating much of the advantage of the file. Then I realised that KDE already has such a beast built in, with further advantages of already being a daemon so that I only need to type in the password once for my entire session no matter how many times I run this app: kwallet. (I know gnome has a similar keyring beast, but I don't run gnome.)

The challenge? While no perl module for kwallet exists yet that I'm aware of, there is Net::DBus. However, the kwallet DBus API is, again as far as I can tell, completely undocumented. So, in case you want to do something similar, here's the basics of what I came up with:

#!/usr/bin/perl use v5.12; use strict; use warnings; use Data::Dump qw(dump); use Net::DBus qw(:typing); my $app_name = "password-extract-in-perl"; my $bus = Net::DBus->find() or die "Can't find DBus"; my $kwallet_service = $bus->get_service('org.kde.kwalletd') or die "Ca +n't get kwallet"; my $KWallet = $kwallet_service->get_object('/modules/kwalletd', 'org.k +de.KWallet') or die "Can't find networkWallet"; my $networkWallet = $KWallet->networkWallet(); say "Network Wallet = $networkWallet"; my $kwallet_handle = $KWallet->open($networkWallet, 0, $app_name); say "Opened = $kwallet_handle"; my $folders = $KWallet->folderList($kwallet_handle,$app_name); say "Folders = ", dump($folders); my $u = $KWallet->readPassword($kwallet_handle, 'MyFolder','Some_Useri +d_Key', $app_name); my $p = $KWallet->readPassword($kwallet_handle, 'MyFolder','Some_Passw +ord_Key', $app_name); say "User ID = ", dump($u); say "Password = ", dump($p);
The last challenge that I had to overcome was that the last parameter to all the $KWallet functions was still $app_name. The only limitation I still am aware of with this is that if you wanted to put the user/password in a map instead of individual password fields, which would make more sense, the data comes back as a "QByteArray" which is the binary representation of a QMap<QString,QString> data type. Extracting this out in Perl will be very fun short of using xs code. Thus my fallback of using a Password field as a user ID. Maybe later I'll look into writing a KDE::KWallet module to encapsulate this, and then learning enough xs to convert between the QMap and Perl hashes.

(I hope this all works with perl 5.8.8 ... since that's what most of my coworkers will have... obviously I'll switch back from say to print, it's Net::DBus which hopefully works there.)


In reply to Extracting passwords from KWallet by Tanktalus

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others cooling their heels in the Monastery: (14)
    As of 2014-09-23 15:42 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (227 votes), past polls