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.\" ========================================================================
.\"
.IX Title "Auth::Yubikey_Decrypter 3pm"
.TH Auth::Yubikey_Decrypter 3pm "2021-01-08" "perl v5.32.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.SH "NAME"
Auth::Yubikey_Decrypter \- Decrypting the output from the yubikey token
.SH "VERSION"
.IX Header "VERSION"
Version 0.07
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
The decryption module does only one thing \- decrypt the \s-1AES\s0 encrypted \s-1OTP\s0 from the Yubikey.  To this, it
requires the \s-1OTP,\s0 and the \s-1AES\s0 key.
.PP
Please note \- this module does not perform authentication \- it is a required component to decrypt the token first before authentication can be performed.
.PP
.Vb 1
\&        #!/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\en";
\&        print "Secret id : $secretid_hex\en";
\&        print "Counter   : $counter_dec\en";
\&        print "Timestamp : $timestamp_dec\en";
\&        print "Session   : $session_use_dec\en";
\&        print "Random    : $random_dec\en";
\&        print "crc       : $crc_dec\en";
\&        print "crc ok?   : $crc_ok\en";
.Ve
.SH "FUNCTIONS"
.IX Header "FUNCTIONS"
.SS "yubikey_decrypt"
.IX Subsection "yubikey_decrypt"
Input : token aeskey
.PP
Token \- received by the Yubikey
aeskey \- either the modhex or hex \s-1AES\s0 key for your Yubikey (contact Yubico if you don't have the \s-1AES\s0 key)
.PP
Output :
.PP
\&\f(CW$publicID\fR
\&\f(CW$secretid_hex\fR
\&\f(CW$counter_dec\fR
\&\f(CW$timestamp_dec\fR
\&\f(CW$session_use_dec\fR
\&\f(CW$random_dec\fR
\&\f(CW$crc_dec\fR
\&\f(CW$crc_ok\fR
.SS "yubikey_modhex_decode"
.IX Subsection "yubikey_modhex_decode"
Input : the modhex code
Output : decoded modhex code in hex
.SS "yubikey_crc_check"
.IX Subsection "yubikey_crc_check"
Performs a crc check on the decoded data
.SH "REQUIRES"
.IX Header "REQUIRES"
Perl 5, Crypt::Rijndael
.PP
Order your Yubikey from <http://www.yubico.com>
.SH "BUGS"
.IX Header "BUGS"
Please report any bugs or feature requests to \f(CW\*(C`bug\-auth\-yubikey_decrypter at rt.cpan.org\*(C'\fR, 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.
.SH "SUPPORT"
.IX Header "SUPPORT"
You can find documentation for this module with the perldoc command.
.PP
.Vb 1
\&    perldoc Auth::Yubikey_Decrypter
.Ve
.PP
You can also look for information at:
.IP "\(bu" 4
\&\s-1RT: CPAN\s0's request tracker
.Sp
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=Auth\-Yubikey_Decrypter>
.IP "\(bu" 4
AnnoCPAN: Annotated \s-1CPAN\s0 documentation
.Sp
<http://annocpan.org/dist/Auth\-Yubikey_Decrypter>
.IP "\(bu" 4
\&\s-1CPAN\s0 Ratings
.Sp
<http://cpanratings.perl.org/d/Auth\-Yubikey_Decrypter>
.IP "\(bu" 4
Search \s-1CPAN\s0
.Sp
<http://search.cpan.org/dist/Auth\-Yubikey_Decrypter>
.SH "AUTHOR"
.IX Header "AUTHOR"
Phil Massyn, \f(CW\*(C`<phil at massyn.net>\*(C'\fR
.SH "ACKNOWLEDGEMENTS"
.IX Header "ACKNOWLEDGEMENTS"
Based a lot on \s-1PHP\s0 code by : \s-1PHP\s0 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.
.SH "COPYRIGHT & LICENSE"
.IX Header "COPYRIGHT & LICENSE"
Copyright 2008 Phil Massyn, all rights reserved.
.PP
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.