284 lines
9.2 KiB
PHP
284 lines
9.2 KiB
PHP
<?php
|
|
|
|
/**
|
|
* Copyright (c) Borago 2019
|
|
*
|
|
* This software is provided 'as-is', without any express or implied
|
|
* warranty. In no event will the authors be held liable for any damages
|
|
* arising from the use of this software.
|
|
*
|
|
* Permission is granted to anyone to use this software for any purpose,
|
|
* including commercial applications, and to alter it and redistribute it
|
|
* freely, subject to the following restrictions:
|
|
*
|
|
* 1. The origin of this software must not be misrepresented; you must not
|
|
* claim that you wrote the original software. If you use this software
|
|
* in a product, an acknowledgment in the product documentation would be
|
|
* appreciated but is not required.
|
|
* 2. Altered source versions must be plainly marked as such, and must not be
|
|
* misrepresented as being the original software.
|
|
* 3. This notice may not be removed or altered from any source distribution.
|
|
**/
|
|
|
|
namespace External\ZipStream {
|
|
class File {
|
|
private $name;
|
|
private $content = '';
|
|
private $fileHandle = false;
|
|
private $lastModificationTimestamp;
|
|
protected $fileSize = 0;
|
|
protected $compressedSize = 0;
|
|
private $offset = 0;
|
|
private $bitField = 0;
|
|
protected $useCompression = true;
|
|
private $deflateState = null;
|
|
|
|
//check for duplications //currently not used
|
|
protected $crc32 = null;
|
|
protected $sha256;
|
|
|
|
public const BIT_NO_SIZE_IN_HEADER = 0b0000000000001000;
|
|
public const BIT_UTF8_NAMES = 0b0000100000000000;
|
|
|
|
public function __construct($name) {
|
|
$this->name = $name;
|
|
$this->lastModificationTimestamp = time();
|
|
$this->crc32 = hash('crc32b', '', true);
|
|
$this->compressedSize = 0;
|
|
$this->fileSize = 0;
|
|
|
|
$this->bitField = 0;
|
|
$this->bitField |= self::BIT_NO_SIZE_IN_HEADER;
|
|
$this->bitField |= self::BIT_UTF8_NAMES;
|
|
|
|
$this->deflateState = deflate_init(ZLIB_ENCODING_RAW);
|
|
}
|
|
|
|
public function disableCompression() {
|
|
$this->useCompression = false;
|
|
}
|
|
|
|
public function setContent($content) {
|
|
$this->crc32 = hash('crc32b', $content, true);
|
|
$this->sha256 = hash('sha256', $content);
|
|
$this->content = $content;
|
|
$this->fileSize = strlen($content);
|
|
$this->fileHandle = false;
|
|
}
|
|
|
|
public function loadFromFile($filename) {
|
|
$this->crc32 = hash_file('crc32b', $filename, true);
|
|
$this->sha256 = hash_file('sha256', $filename);
|
|
$this->fileSize = filesize($filename);
|
|
$this->fileHandle = fopen($filename, 'rb');
|
|
}
|
|
|
|
public function name() {
|
|
return $this->name;
|
|
}
|
|
|
|
public function sha256() {
|
|
return $this->sha256;
|
|
}
|
|
|
|
private function unixTimeToDosTime($timestamp) {
|
|
$hour = intval(date('H', $timestamp));
|
|
$min = intval(date('i', $timestamp));
|
|
$sec = intval(date('s', $timestamp));
|
|
return ($hour << 11) |
|
|
($min << 5) |
|
|
($sec >> 1);
|
|
}
|
|
|
|
private function unixTimeToDosDate($timestamp) {
|
|
$year = intval(date('Y', $timestamp));
|
|
$month = intval(date('m', $timestamp));
|
|
$day = intval(date('d', $timestamp));
|
|
return (($year - 1980) << 9) |
|
|
($month << 5) |
|
|
($day);
|
|
}
|
|
|
|
public function readLocalFileHeader(bool $zip64 = false) {
|
|
if (!$this->useCompression) {
|
|
$this->compressedSize = $this->fileSize;
|
|
}
|
|
|
|
$header = "";
|
|
$header .= "\x50\x4b\x03\x04";
|
|
$header .= $zip64 ? "\x2d\x00" : "\x14\x00"; //version 2.0 and MS-DOS compatible
|
|
$header .= pack("v", $this->bitField); //general purpose bit flag
|
|
if ($this->useCompression) {
|
|
$header .= "\x08\x00"; //compression Method - deflate
|
|
} else {
|
|
$header .= "\x00\x00"; //compression Method - no
|
|
}
|
|
$header .= pack("v", $this->unixTimeToDosTime($this->lastModificationTimestamp)); //dos time
|
|
$header .= pack("v", $this->unixTimeToDosDate($this->lastModificationTimestamp)); //dos date
|
|
|
|
if ($zip64) {
|
|
if ($this->bitField & self::BIT_NO_SIZE_IN_HEADER) {
|
|
$header .= pack("V", 0); //crc32
|
|
} else {
|
|
$header .= strrev($this->crc32);
|
|
}
|
|
$header .= "\xFF\xFF\xFF\xFF"; //compressed Size
|
|
$header .= "\xFF\xFF\xFF\xFF"; //uncompressed Size
|
|
} else {
|
|
if ($this->bitField & self::BIT_NO_SIZE_IN_HEADER) {
|
|
$header .= pack("V", 0); //crc32
|
|
$header .= pack("V", 0); //compressed Size
|
|
$header .= pack("V", 0); //uncompressed Size
|
|
} else {
|
|
$header .= strrev($this->crc32);
|
|
$header .= pack("V", $this->compressedSize); //compressed Size
|
|
$header .= pack("V", $this->fileSize); //uncompressed Size
|
|
}
|
|
}
|
|
|
|
$header .= pack("v", strlen($this->name)); //filename
|
|
if ($zip64) {
|
|
$header .= pack("v", 16+4); //extra field length (signatures + data)
|
|
$header .= $this->name;
|
|
$header .= pack("v", 0x0001); # Zip64 extended information extra field
|
|
$header .= pack("v", 16); // 2 * 8 byte
|
|
if ($this->bitField & self::BIT_NO_SIZE_IN_HEADER) {
|
|
$header .= pack("P", 0);
|
|
$header .= pack("P", 0);
|
|
} else {
|
|
$header .= pack("P", $this->compressedSize);
|
|
$header .= pack("P", $this->fileSize);
|
|
}
|
|
} else {
|
|
$header .= "\x00\x00"; //extra field length
|
|
$header .= $this->name;
|
|
}
|
|
|
|
return $header;
|
|
}
|
|
|
|
public function readDataDescriptor(bool $zip64 = false) {
|
|
|
|
if (!$this->useCompression) {
|
|
$this->compressedSize = $this->fileSize;
|
|
}
|
|
|
|
$data = "";
|
|
$data .= "\x50\x4b\x07\x08";
|
|
$data .= strrev($this->crc32);
|
|
$data .= $zip64 ? pack("P", $this->compressedSize) : pack("V", $this->compressedSize); //compressed Size
|
|
$data .= $zip64 ? pack("P", $this->fileSize) : pack("V", $this->fileSize); //uncompressed Size
|
|
return $data;
|
|
}
|
|
|
|
public function readFileDataImp() {
|
|
$ret = null;
|
|
if ($this->fileHandle !== false) {
|
|
$block = fread($this->fileHandle, 65536);
|
|
if (!empty($block)) {
|
|
$ret = $block;
|
|
}
|
|
} else {
|
|
$ret = $this->content;
|
|
$this->content = null;
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
protected function compress($block) {
|
|
|
|
$ret = null;
|
|
if ($this->deflateState !== null) {
|
|
if (!empty($block)) {
|
|
$ret = deflate_add($this->deflateState, $block, ZLIB_NO_FLUSH);
|
|
} else {
|
|
$ret = deflate_add($this->deflateState, '', ZLIB_FINISH);
|
|
$this->deflateState = null;
|
|
}
|
|
|
|
$this->compressedSize += strlen($ret);
|
|
}
|
|
|
|
return $ret;
|
|
}
|
|
|
|
public function readFileData() {
|
|
$ret = null;
|
|
if ($this->useCompression) {
|
|
$block = $this->readFileDataImp();
|
|
$ret = $this->compress($block);
|
|
} else {
|
|
$ret = $this->readFileDataImp();
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
public function setOffset($offset) {
|
|
$this->offset = $offset;
|
|
}
|
|
|
|
public function readCentralDirectoryHeader(bool $zip64 = false) {
|
|
|
|
$maxInt32 = 0xFFFFFFFF;
|
|
$extraFields = "";
|
|
|
|
// Compressed Size
|
|
if ($zip64 && $this->compressedSize >= $maxInt32) {
|
|
$compressedSize = "\xFF\xFF\xFF\xFF";
|
|
$extraFields .= pack("P", $this->compressedSize);
|
|
} else {
|
|
$compressedSize = pack("V", $this->compressedSize);
|
|
}
|
|
|
|
// Uncompressed Size
|
|
if ($zip64 && $this->fileSize >= $maxInt32) {
|
|
$fileSize = "\xFF\xFF\xFF\xFF";
|
|
$extraFields .= pack("P", $this->fileSize);
|
|
} else {
|
|
$fileSize = pack("V", $this->fileSize);
|
|
}
|
|
|
|
// Offset
|
|
if ($zip64 && $this->offset >= $maxInt32) {
|
|
$offset = "\xFF\xFF\xFF\xFF";
|
|
$extraFields .= pack("P", $this->offset);
|
|
} else {
|
|
$offset = pack("V", $this->offset);
|
|
}
|
|
|
|
$header = "";
|
|
$header .= "\x50\x4b\x01\x02";
|
|
$header .= $zip64 ? "\x2d\x00" : "\x14\x00"; //version 2.0 and MS-DOS compatible
|
|
$header .= $zip64 ? "\x2d\x00" : "\x14\x00"; //version 2.0 and MS-DOS compatible
|
|
$header .= pack("v", $this->bitField); //general purpose bit flag
|
|
$header .= $this->useCompression ? "\x08\x00" : "\x00\x00"; //compression Method - no
|
|
$header .= pack("v", $this->unixTimeToDosTime($this->lastModificationTimestamp)); //dos time
|
|
$header .= pack("v", $this->unixTimeToDosDate($this->lastModificationTimestamp)); //dos date
|
|
$header .= strrev($this->crc32);
|
|
$header .= $compressedSize; //compressed Size
|
|
$header .= $fileSize; //uncompressed Size
|
|
$header .= pack("v", strlen($this->name)); //filename
|
|
$header .= (strlen($extraFields) > 0) ? pack('v', strlen($extraFields) + 4) : "\x00\x00"; //extra field length
|
|
$header .= "\x00\x00"; //comment length
|
|
$header .= "\x00\x00"; //disk num start
|
|
$header .= "\x00\x00"; //int file attr
|
|
$header .= "\x00\x00\x00\x00"; //ext file attr
|
|
$header .= $offset; //relative offset
|
|
$header .= $this->name;
|
|
|
|
if (strlen($extraFields) > 0) {
|
|
$header .= pack("v", 0x0001); # Zip64 extended information extra field
|
|
$header .= pack("v", strlen($extraFields));
|
|
$header .= $extraFields;
|
|
}
|
|
|
|
return $header;
|
|
}
|
|
|
|
public function closeHandle() {
|
|
if ($this->fileHandle) {
|
|
fclose($this->fileHandle);
|
|
}
|
|
}
|
|
}
|
|
} |