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Common.php
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<?php // +-----------------------------------------------------------------------+ // | Copyright (c) 2002-2003 Richard Heyes | // | All rights reserved. | // | | // | Redistribution and use in source and binary forms, with or without | // | modification, are permitted provided that the following conditions | // | are met: | // | | // | o Redistributions of source code must retain the above copyright | // | notice, this list of conditions and the following disclaimer. | // | o Redistributions in binary form must reproduce the above copyright | // | notice, this list of conditions and the following disclaimer in the | // | documentation and/or other materials provided with the distribution.| // | o The names of the authors may not be used to endorse or promote | // | products derived from this software without specific prior written | // | permission. | // | | // | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | // | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | // | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | // | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | // | OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | // | SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | // | LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | // | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | // | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | // | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | // | OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | // | | // +-----------------------------------------------------------------------+ // | Author: Richard Heyes <richard@php.net> | // +-----------------------------------------------------------------------+ // // $Id$ /** * Common functionality to SASL mechanisms * * @author Richard Heyes <richard@php.net> * @access public * @version 1.0 * @package Auth_SASL */ class Auth_SASL_Common { /** * Function which implements HMAC MD5 digest * * @param string $key The secret key * @param string $data The data to hash * @param bool $raw_output Whether the digest is returned in binary or hexadecimal format. * * @return string The HMAC-MD5 digest */ function _HMAC_MD5($key, $data, $raw_output = FALSE) { if (strlen($key) > 64) { $key = pack('H32', md5($key)); } if (strlen($key) < 64) { $key = str_pad($key, 64, chr(0)); } $k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64); $k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64); $inner = pack('H32', md5($k_ipad . $data)); $digest = md5($k_opad . $inner, $raw_output); return $digest; } /** * Function which implements HMAC-SHA-1 digest * * @param string $key The secret key * @param string $data The data to hash * @param bool $raw_output Whether the digest is returned in binary or hexadecimal format. * @return string The HMAC-SHA-1 digest * @author Jehan <jehan.marmottard@gmail.com> * @access protected */ protected function _HMAC_SHA1($key, $data, $raw_output = FALSE) { if (strlen($key) > 64) { $key = sha1($key, TRUE); } if (strlen($key) < 64) { $key = str_pad($key, 64, chr(0)); } $k_ipad = substr($key, 0, 64) ^ str_repeat(chr(0x36), 64); $k_opad = substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64); $inner = pack('H40', sha1($k_ipad . $data)); $digest = sha1($k_opad . $inner, $raw_output); return $digest; } } ?>
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