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