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<?php
/**
* Copyright 1999-2017 Horde LLC (http://www.horde.org/)
*
* -----
*
* This file contains code adapted from PEAR's PHP_Compat library (v1.6.0a3).
*
* http://pear.php.net/package/PHP_Compat
*
* This code was released under the LGPL 2.1
*
* -----
*
* See the enclosed file LICENSE for license information (LGPL). If you
* did not receive this file, see http://www.horde.org/licenses/lgpl21.
*
* @category Horde
* @copyright 2009-2017 Horde LLC
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Mime
*/
/**
* Class used to uudecode data.
*
* Needed because PHP's built-in uudecode() method is broken.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Aidan Lister <aidan@php.net>
* @author Michael Slusarz <slusarz@horde.org>
* @author Michael Wallner <mike@php.net>
* @category Horde
* @copyright 2009-2017 Horde LLC
* @copyright 2004-2007 Aidan Lister <aidan@php.net>, Arpad Ray <arpad@php.net>
* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
* @package Mime
* @since 2.5.0
*/
class Horde_Mime_Uudecode implements Countable, IteratorAggregate
{
const UUENCODE_REGEX = "/begin ([0-7]{3}) (.+)\r?\n(.+)\r?\nend/Us";
/**
* Uudecode data.
*
* A list of arrays, with each array corresponding to a file in the input
* and containing the following keys:
* - data: (string) Unencoded data.
* - name: (string) Filename.
* - perms: (string) Octal permissions.
*
* @var array
*/
protected $_data = array();
/**
* Scans $input for uuencoded data and converts it to unencoded data.
*
* @param string $input The input data
*/
public function __construct($input)
{
/* Find all uuencoded sections. */
if (preg_match_all(self::UUENCODE_REGEX, $input, $matches, PREG_SET_ORDER)) {
foreach ($matches as $v) {
$this->_data[] = array(
'data' => $this->_uudecode($v[3]),
'name' => $v[2],
'perm' => $v[1]
);
}
}
}
/**
* PHP 5's built-in convert_uudecode() is broken. Need this wrapper.
*
* @param string $input UUencoded input.
*
* @return string Decoded string.
*/
protected function _uudecode($input)
{
$decoded = '';
foreach (explode("\n", $input) as $line) {
$c = count($bytes = unpack('c*', substr(trim($line,"\r\n\t"), 1)));
while ($c % 4) {
$bytes[++$c] = 0;
}
foreach (array_chunk($bytes, 4) as $b) {
$b0 = ($b[0] == 0x60) ? 0 : $b[0] - 0x20;
$b1 = ($b[1] == 0x60) ? 0 : $b[1] - 0x20;
$b2 = ($b[2] == 0x60) ? 0 : $b[2] - 0x20;
$b3 = ($b[3] == 0x60) ? 0 : $b[3] - 0x20;
$b0 <<= 2;
$b0 |= ($b1 >> 4) & 0x03;
$b1 <<= 4;
$b1 |= ($b2 >> 2) & 0x0F;
$b2 <<= 6;
$b2 |= $b3 & 0x3F;
$decoded .= pack('c*', $b0, $b1, $b2);
}
}
return rtrim($decoded, "\0");
}
/* Countable method. */
public function count()
{
return count($this->_data);
}
/* IteratorAggregate method. */
public function getIterator()
{
return new ArrayIterator($this->_data);
}
}