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<?php
/*
* Copyright (C) 2009 Simon Josefsson <simon@yubico.com>.
*
* This file is part of simpleSAMLphp
*
* simpleSAMLphp is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* simpleSAMLphp is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License License along with GNU SASL Library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
/**
* A processing filter to replace the 'otp' attribute with an attribute
* 'yubiPrefix' that contains the static YubiKey prefix.
*
* Before:
* otp=ekhgjhbctrgnubeeklijcibbgjnbtjlffdnjbhjluvur
*
* After:
* otp undefined
* yubiPrefix=ekhgjhbctrgn
*
* You use it by adding it as an authentication filter in config.php:
*
* 'authproc.idp' => array(
* ...
* 90 => 'authYubiKey:OTP2YubiPrefix',
* ...
* );
*
*/
class sspmod_authYubiKey_Auth_Process_OTP2YubiPrefix extends SimpleSAML_Auth_ProcessingFilter {
/**
* Filter out YubiKey 'otp' attribute and replace it with
* a 'yubiPrefix' attribute that leaves out the dynamic part.
*
* @param array &$state The state we should update.
*/
public function process(&$state) {
assert('is_array($state)');
assert('array_key_exists("Attributes", $state)');
$attributes = $state['Attributes'];
SimpleSAML_Logger::debug('OTP2YubiPrefix: enter with attributes: ' . implode(',', array_keys($attributes)));
$otps = $attributes['otp'];
$otp = $otps['0'];
$token_size = 32;
$identity = substr ($otp, 0, strlen ($otp) - $token_size);
$attributes['yubiPrefix'] = array($identity);
SimpleSAML_Logger::info('OTP2YubiPrefix: otp: ' . $otp . ' identity: ' . $identity . ' (otp keys: ' . implode(',', array_keys($otps)) . ')');
unset($attributes['otp']);
SimpleSAML_Logger::debug('OTP2YubiPrefix: leaving with attributes: ' . implode(',', array_keys($attributes)));
}
}
?>
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