From 10dc1e2cb4c4940981a3abd776350dc07f92fc3e Mon Sep 17 00:00:00 2001
From: filip <filip.komar@gmail.com>
Date: Fri, 3 Aug 2018 16:37:28 +0200
Subject: upgrade SimplePie from 1.3.1 to 1.5.2 as a part of a #mga23215 bugfix

---
 lib/simplepie/library/SimplePie/gzdecode.php | 366 +++++++++++++++++++++++++++
 1 file changed, 366 insertions(+)
 create mode 100644 lib/simplepie/library/SimplePie/gzdecode.php

(limited to 'lib/simplepie/library/SimplePie/gzdecode.php')

diff --git a/lib/simplepie/library/SimplePie/gzdecode.php b/lib/simplepie/library/SimplePie/gzdecode.php
new file mode 100644
index 000000000..f4aeafa28
--- /dev/null
+++ b/lib/simplepie/library/SimplePie/gzdecode.php
@@ -0,0 +1,366 @@
+<?php
+/**
+ * SimplePie
+ *
+ * A PHP-Based RSS and Atom Feed Framework.
+ * Takes the hard work out of managing a complete RSS/Atom solution.
+ *
+ * Copyright (c) 2004-2016, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ * 	* Redistributions of source code must retain the above copyright notice, this list of
+ * 	  conditions and the following disclaimer.
+ *
+ * 	* 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.
+ *
+ * 	* Neither the name of the SimplePie Team nor the names of its contributors may 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 HOLDERS
+ * AND 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.
+ *
+ * @package SimplePie
+ * @copyright 2004-2016 Ryan Parman, Geoffrey Sneddon, Ryan McCue
+ * @author Ryan Parman
+ * @author Geoffrey Sneddon
+ * @author Ryan McCue
+ * @link http://simplepie.org/ SimplePie
+ * @license http://www.opensource.org/licenses/bsd-license.php BSD License
+ */
+
+
+/**
+ * Decode 'gzip' encoded HTTP data
+ *
+ * @package SimplePie
+ * @subpackage HTTP
+ * @link http://www.gzip.org/format.txt
+ */
+class SimplePie_gzdecode
+{
+	/**
+	 * Compressed data
+	 *
+	 * @access private
+	 * @var string
+	 * @see gzdecode::$data
+	 */
+	var $compressed_data;
+
+	/**
+	 * Size of compressed data
+	 *
+	 * @access private
+	 * @var int
+	 */
+	var $compressed_size;
+
+	/**
+	 * Minimum size of a valid gzip string
+	 *
+	 * @access private
+	 * @var int
+	 */
+	var $min_compressed_size = 18;
+
+	/**
+	 * Current position of pointer
+	 *
+	 * @access private
+	 * @var int
+	 */
+	var $position = 0;
+
+	/**
+	 * Flags (FLG)
+	 *
+	 * @access private
+	 * @var int
+	 */
+	var $flags;
+
+	/**
+	 * Uncompressed data
+	 *
+	 * @access public
+	 * @see gzdecode::$compressed_data
+	 * @var string
+	 */
+	var $data;
+
+	/**
+	 * Modified time
+	 *
+	 * @access public
+	 * @var int
+	 */
+	var $MTIME;
+
+	/**
+	 * Extra Flags
+	 *
+	 * @access public
+	 * @var int
+	 */
+	var $XFL;
+
+	/**
+	 * Operating System
+	 *
+	 * @access public
+	 * @var int
+	 */
+	var $OS;
+
+	/**
+	 * Subfield ID 1
+	 *
+	 * @access public
+	 * @see gzdecode::$extra_field
+	 * @see gzdecode::$SI2
+	 * @var string
+	 */
+	var $SI1;
+
+	/**
+	 * Subfield ID 2
+	 *
+	 * @access public
+	 * @see gzdecode::$extra_field
+	 * @see gzdecode::$SI1
+	 * @var string
+	 */
+	var $SI2;
+
+	/**
+	 * Extra field content
+	 *
+	 * @access public
+	 * @see gzdecode::$SI1
+	 * @see gzdecode::$SI2
+	 * @var string
+	 */
+	var $extra_field;
+
+	/**
+	 * Original filename
+	 *
+	 * @access public
+	 * @var string
+	 */
+	var $filename;
+
+	/**
+	 * Human readable comment
+	 *
+	 * @access public
+	 * @var string
+	 */
+	var $comment;
+
+	/**
+	 * Don't allow anything to be set
+	 *
+	 * @param string $name
+	 * @param mixed $value
+	 */
+	public function __set($name, $value)
+	{
+		trigger_error("Cannot write property $name", E_USER_ERROR);
+	}
+
+	/**
+	 * Set the compressed string and related properties
+	 *
+	 * @param string $data
+	 */
+	public function __construct($data)
+	{
+		$this->compressed_data = $data;
+		$this->compressed_size = strlen($data);
+	}
+
+	/**
+	 * Decode the GZIP stream
+	 *
+	 * @return bool Successfulness
+	 */
+	public function parse()
+	{
+		if ($this->compressed_size >= $this->min_compressed_size)
+		{
+			// Check ID1, ID2, and CM
+			if (substr($this->compressed_data, 0, 3) !== "\x1F\x8B\x08")
+			{
+				return false;
+			}
+
+			// Get the FLG (FLaGs)
+			$this->flags = ord($this->compressed_data[3]);
+
+			// FLG bits above (1 << 4) are reserved
+			if ($this->flags > 0x1F)
+			{
+				return false;
+			}
+
+			// Advance the pointer after the above
+			$this->position += 4;
+
+			// MTIME
+			$mtime = substr($this->compressed_data, $this->position, 4);
+			// Reverse the string if we're on a big-endian arch because l is the only signed long and is machine endianness
+			if (current(unpack('S', "\x00\x01")) === 1)
+			{
+				$mtime = strrev($mtime);
+			}
+			$this->MTIME = current(unpack('l', $mtime));
+			$this->position += 4;
+
+			// Get the XFL (eXtra FLags)
+			$this->XFL = ord($this->compressed_data[$this->position++]);
+
+			// Get the OS (Operating System)
+			$this->OS = ord($this->compressed_data[$this->position++]);
+
+			// Parse the FEXTRA
+			if ($this->flags & 4)
+			{
+				// Read subfield IDs
+				$this->SI1 = $this->compressed_data[$this->position++];
+				$this->SI2 = $this->compressed_data[$this->position++];
+
+				// SI2 set to zero is reserved for future use
+				if ($this->SI2 === "\x00")
+				{
+					return false;
+				}
+
+				// Get the length of the extra field
+				$len = current(unpack('v', substr($this->compressed_data, $this->position, 2)));
+				$this->position += 2;
+
+				// Check the length of the string is still valid
+				$this->min_compressed_size += $len + 4;
+				if ($this->compressed_size >= $this->min_compressed_size)
+				{
+					// Set the extra field to the given data
+					$this->extra_field = substr($this->compressed_data, $this->position, $len);
+					$this->position += $len;
+				}
+				else
+				{
+					return false;
+				}
+			}
+
+			// Parse the FNAME
+			if ($this->flags & 8)
+			{
+				// Get the length of the filename
+				$len = strcspn($this->compressed_data, "\x00", $this->position);
+
+				// Check the length of the string is still valid
+				$this->min_compressed_size += $len + 1;
+				if ($this->compressed_size >= $this->min_compressed_size)
+				{
+					// Set the original filename to the given string
+					$this->filename = substr($this->compressed_data, $this->position, $len);
+					$this->position += $len + 1;
+				}
+				else
+				{
+					return false;
+				}
+			}
+
+			// Parse the FCOMMENT
+			if ($this->flags & 16)
+			{
+				// Get the length of the comment
+				$len = strcspn($this->compressed_data, "\x00", $this->position);
+
+				// Check the length of the string is still valid
+				$this->min_compressed_size += $len + 1;
+				if ($this->compressed_size >= $this->min_compressed_size)
+				{
+					// Set the original comment to the given string
+					$this->comment = substr($this->compressed_data, $this->position, $len);
+					$this->position += $len + 1;
+				}
+				else
+				{
+					return false;
+				}
+			}
+
+			// Parse the FHCRC
+			if ($this->flags & 2)
+			{
+				// Check the length of the string is still valid
+				$this->min_compressed_size += $len + 2;
+				if ($this->compressed_size >= $this->min_compressed_size)
+				{
+					// Read the CRC
+					$crc = current(unpack('v', substr($this->compressed_data, $this->position, 2)));
+
+					// Check the CRC matches
+					if ((crc32(substr($this->compressed_data, 0, $this->position)) & 0xFFFF) === $crc)
+					{
+						$this->position += 2;
+					}
+					else
+					{
+						return false;
+					}
+				}
+				else
+				{
+					return false;
+				}
+			}
+
+			// Decompress the actual data
+			if (($this->data = gzinflate(substr($this->compressed_data, $this->position, -8))) === false)
+			{
+				return false;
+			}
+
+			$this->position = $this->compressed_size - 8;
+
+			// Check CRC of data
+			$crc = current(unpack('V', substr($this->compressed_data, $this->position, 4)));
+			$this->position += 4;
+			/*if (extension_loaded('hash') && sprintf('%u', current(unpack('V', hash('crc32b', $this->data)))) !== sprintf('%u', $crc))
+			{
+				return false;
+			}*/
+
+			// Check ISIZE of data
+			$isize = current(unpack('V', substr($this->compressed_data, $this->position, 4)));
+			$this->position += 4;
+			if (sprintf('%u', strlen($this->data) & 0xFFFFFFFF) !== sprintf('%u', $isize))
+			{
+				return false;
+			}
+
+			// Wow, against all odds, we've actually got a valid gzip string
+			return true;
+		}
+
+		return false;
+	}
+}
-- 
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