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

Auth::Yubikey_Decrypter(3pm) User Contributed Perl Documentation Auth::Yubikey_Decrypter(3pm)


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


Version 0.07


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.
        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) =
        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";



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


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


Performs a crc check on the decoded data


Perl 5, Crypt::Rijndael
Order your Yubikey from <>


Please report any bugs or feature requests to "bug-auth-yubikey_decrypter at", or through the web interface at <>. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.


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
AnnoCPAN: Annotated CPAN documentation
CPAN Ratings
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Phil Massyn, "<phil at>"


Based a lot on PHP code by : PHP yubikey decryptor v0.1 by Alex Skov Jensen Thanks to almut from <> for code guidance Thanks to Mark Foobar <> for reporting the -32 bug on line 91 and 92. 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.
2009-12-12 perl v5.10.1