NAME

       Auth::Yubikey_Decrypter - Decrypting the output from the yubikey token

VERSION

       Version 0.07

SYNOPSIS

       The decryption module does only one thing - decrypt the AES encrypted OTP from the
       Yubikey.  To this, it requires the OTP, and the AES key.

       Please note - this module does not perform authentication - it is a required component to
       decrypt the token first before authentication can be performed.

               #!/usr/bin/perl

               use strict;
               use Auth::Yubikey_Decrypter;

               my $fulltoken   = "dteffujehknhfjbrjnlnldnhcujvddbikngjrtgh";
               my $aeskey      = "ecde18dbe76fbd0c33330f1c354871db";

               my ($publicID,$secretid_hex,$counter_dec,$timestamp_dec,$session_use_dec,$random_dec,$crc_dec,$crc_ok) =
                       Auth::Yubikey_Decrypter::yubikey_decrypt($fulltoken,$aeskey);

               print "publicID  : $publicID\n";
               print "Secret id : $secretid_hex\n";
               print "Counter   : $counter_dec\n";
               print "Timestamp : $timestamp_dec\n";
               print "Session   : $session_use_dec\n";
               print "Random    : $random_dec\n";
               print "crc       : $crc_dec\n";
               print "crc ok?   : $crc_ok\n";

FUNCTIONS

   yubikey_decrypt
       Input : token aeskey

       Token - received by the Yubikey aeskey - either the modhex or hex AES key for your Yubikey
       (contact Yubico if you don't have the AES key)

       Output :

       $publicID $secretid_hex $counter_dec $timestamp_dec $session_use_dec $random_dec $crc_dec
       $crc_ok

   yubikey_modhex_decode
       Input : the modhex code Output : decoded modhex code in hex

   yubikey_crc_check
       Performs a crc check on the decoded data

REQUIRES

       Perl 5, Crypt::Rijndael

       Order your Yubikey from <http://www.yubico.com>

BUGS

       Please report any bugs or feature requests to "bug-auth-yubikey_decrypter at rt.cpan.org",
       or through the web interface at
       <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Auth-Yubikey_Decrypter>.  I will be
       notified, and then you'll automatically be notified of progress on your bug as I make
       changes.

SUPPORT

       You can find documentation for this module with the perldoc command.

           perldoc Auth::Yubikey_Decrypter

       You can also look for information at:

       •   RT: CPAN's request tracker

           <http://rt.cpan.org/NoAuth/Bugs.html?Dist=Auth-Yubikey_Decrypter>

       •   AnnoCPAN: Annotated CPAN documentation

           <http://annocpan.org/dist/Auth-Yubikey_Decrypter>

       •   CPAN Ratings

           <http://cpanratings.perl.org/d/Auth-Yubikey_Decrypter>

       •   Search CPAN

           <http://search.cpan.org/dist/Auth-Yubikey_Decrypter>

AUTHOR

       Phil Massyn, "<phil at massyn.net>"

ACKNOWLEDGEMENTS

       Based a lot on PHP code by : PHP yubikey decryptor v0.1 by Alex Skov Jensen Thanks to
       almut from <http://perlmonks.org> for code guidance Thanks to Mark Foobar
       <http://blog.maniac.nl> for reporting the -32 bug on line 91 and 92.

COPYRIGHT & LICENSE

       Copyright 2008 Phil Massyn, all rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.