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<?php
namespace PhpZip\Model\Entry;
use PhpZip\Exception\InvalidArgumentException;
use PhpZip\Exception\ZipException;
use PhpZip\Extra\ExtraFieldsCollection;
use PhpZip\Extra\ExtraFieldsFactory;
use PhpZip\Extra\Fields\WinZipAesEntryExtraField;
use PhpZip\Model\ZipEntry;
use PhpZip\Util\DateTimeConverter;
use PhpZip\Util\StringUtil;
use PhpZip\ZipFileInterface;
/**
* Abstract ZIP entry.
*
* @see https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT .ZIP File Format Specification
* @author Ne-Lexa [email protected]
* @license MIT
*/
abstract class ZipAbstractEntry implements ZipEntry
{
/**
* @var int Bit flags for init state.
*/
private $init;
/**
* @var string Entry name (filename in archive)
*/
private $name;
/**
* @var int Made by platform
*/
private $platform;
/**
* @var int
*/
private $versionNeededToExtract = 20;
/**
* @var int Compression method
*/
private $method;
/**
* @var int
*/
private $general;
/**
* @var int Dos time
*/
private $dosTime;
/**
* @var int Crc32
*/
private $crc;
/**
* @var int Compressed size
*/
private $compressedSize = self::UNKNOWN;
/**
* @var int Uncompressed size
*/
private $size = self::UNKNOWN;
/**
* @var int External attributes
*/
private $externalAttributes;
/**
* @var int Relative Offset Of Local File Header.
*/
private $offset = self::UNKNOWN;
/**
* Collections of Extra Fields.
* Keys from Header ID [int] and value Extra Field [ExtraField].
* Should be null or may be empty if no Extra Fields are used.
*
* @var ExtraFieldsCollection
*/
private $extraFieldsCollection;
/**
* @var string Comment field.
*/
private $comment;
/**
* @var string Entry password for read or write encryption data.
*/
private $password;
/**
* Encryption method.
* @see ZipFileInterface::ENCRYPTION_METHOD_TRADITIONAL
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_128
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_192
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_256
* @var int
*/
private $encryptionMethod = ZipFileInterface::ENCRYPTION_METHOD_TRADITIONAL;
/**
* @var int
*/
private $compressionLevel = ZipFileInterface::LEVEL_DEFAULT_COMPRESSION;
/**
* ZipAbstractEntry constructor.
*/
public function __construct()
{
$this->extraFieldsCollection = new ExtraFieldsCollection();
}
/**
* @param ZipEntry $entry
* @throws ZipException
*/
public function setEntry(ZipEntry $entry)
{
$this->setName($entry->getName());
$this->setPlatform($entry->getPlatform());
$this->setVersionNeededToExtract($entry->getVersionNeededToExtract());
$this->setMethod($entry->getMethod());
$this->setGeneralPurposeBitFlags($entry->getGeneralPurposeBitFlags());
$this->setDosTime($entry->getDosTime());
$this->setCrc($entry->getCrc());
$this->setCompressedSize($entry->getCompressedSize());
$this->setSize($entry->getSize());
$this->setExternalAttributes($entry->getExternalAttributes());
$this->setOffset($entry->getOffset());
$this->setExtra($entry->getExtra());
$this->setComment($entry->getComment());
$this->setPassword($entry->getPassword());
$this->setEncryptionMethod($entry->getEncryptionMethod());
$this->setCompressionLevel($entry->getCompressionLevel());
$this->setEncrypted($entry->isEncrypted());
}
/**
* Returns the ZIP entry name.
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set entry name.
*
* @param string $name New entry name
* @return ZipEntry
* @throws ZipException
*/
public function setName($name)
{
$length = strlen($name);
if (0x0000 > $length || $length > 0xffff) {
throw new ZipException('Illegal zip entry name parameter');
}
$this->setGeneralPurposeBitFlag(self::GPBF_UTF8, true);
$this->name = $name;
return $this;
}
/**
* Sets the indexed General Purpose Bit Flag.
*
* @param int $mask
* @param bool $bit
* @return ZipEntry
*/
public function setGeneralPurposeBitFlag($mask, $bit)
{
if ($bit) {
$this->general |= $mask;
} else {
$this->general &= ~$mask;
}
return $this;
}
/**
* @return int Get platform
*/
public function getPlatform()
{
return $this->isInit(self::BIT_PLATFORM) ? $this->platform & 0xffff : self::UNKNOWN;
}
/**
* Set platform
*
* @param int $platform
* @return ZipEntry
* @throws ZipException
*/
public function setPlatform($platform)
{
$known = self::UNKNOWN !== $platform;
if ($known) {
if (0x00 > $platform || $platform > 0xff) {
throw new ZipException("Platform out of range");
}
$this->platform = $platform;
} else {
$this->platform = 0;
}
$this->setInit(self::BIT_PLATFORM, $known);
return $this;
}
/**
* @param int $mask
* @return bool
*/
protected function isInit($mask)
{
return ($this->init & $mask) !== 0;
}
/**
* @param int $mask
* @param bool $init
*/
protected function setInit($mask, $init)
{
if ($init) {
$this->init |= $mask;
} else {
$this->init &= ~$mask;
}
}
/**
* Version needed to extract.
*
* @return int
*/
public function getVersionNeededToExtract()
{
return $this->versionNeededToExtract;
}
/**
* Set version needed to extract.
*
* @param int $version
* @return ZipEntry
*/
public function setVersionNeededToExtract($version)
{
$this->versionNeededToExtract = $version;
return $this;
}
/**
* @return bool
*/
public function isZip64ExtensionsRequired()
{
return 0xffffffff <= $this->getCompressedSize()
|| 0xffffffff <= $this->getSize();
}
/**
* Returns the compressed size of this entry.
*
* @see int
*/
public function getCompressedSize()
{
return $this->compressedSize;
}
/**
* Sets the compressed size of this entry.
*
* @param int $compressedSize The Compressed Size.
* @return ZipEntry
*/
public function setCompressedSize($compressedSize)
{
$this->compressedSize = $compressedSize;
return $this;
}
/**
* Returns the uncompressed size of this entry.
*
* @see ZipEntry::setCompressedSize
*/
public function getSize()
{
return $this->size;
}
/**
* Sets the uncompressed size of this entry.
*
* @param int $size The (Uncompressed) Size.
* @return ZipEntry
*/
public function setSize($size)
{
$this->size = $size;
return $this;
}
/**
* Return relative Offset Of Local File Header.
*
* @return int
*/
public function getOffset()
{
return $this->offset;
}
/**
* @param int $offset
* @return ZipEntry
*/
public function setOffset($offset)
{
$this->offset = $offset;
return $this;
}
/**
* Returns the General Purpose Bit Flags.
* @return int
*/
public function getGeneralPurposeBitFlags()
{
return $this->general & 0xffff;
}
/**
* Sets the General Purpose Bit Flags.
*
* @var int general
* @return ZipEntry
* @throws ZipException
*/
public function setGeneralPurposeBitFlags($general)
{
if (0x0000 > $general || $general > 0xffff) {
throw new ZipException('general out of range');
}
$this->general = $general;
if ($this->method === ZipFileInterface::METHOD_DEFLATED) {
$bit1 = $this->getGeneralPurposeBitFlag(self::GPBF_COMPRESSION_FLAG1);
$bit2 = $this->getGeneralPurposeBitFlag(self::GPBF_COMPRESSION_FLAG2);
if ($bit1 && !$bit2) {
$this->compressionLevel = ZipFileInterface::LEVEL_BEST_COMPRESSION;
} elseif (!$bit1 && $bit2) {
$this->compressionLevel = ZipFileInterface::LEVEL_FAST;
} elseif ($bit1 && $bit2) {
$this->compressionLevel = ZipFileInterface::LEVEL_SUPER_FAST;
} else {
$this->compressionLevel = ZipFileInterface::LEVEL_DEFAULT_COMPRESSION;
}
}
return $this;
}
/**
* Returns true if and only if this ZIP entry is encrypted.
*
* @return bool
*/
public function isEncrypted()
{
return $this->getGeneralPurposeBitFlag(self::GPBF_ENCRYPTED);
}
/**
* Returns the indexed General Purpose Bit Flag.
*
* @param int $mask
* @return bool
*/
public function getGeneralPurposeBitFlag($mask)
{
return ($this->general & $mask) !== 0;
}
/**
* Sets the encryption property to false and removes any other
* encryption artifacts.
*
* @return ZipEntry
* @throws ZipException
*/
public function disableEncryption()
{
$this->setEncrypted(false);
$headerId = WinZipAesEntryExtraField::getHeaderId();
if (isset($this->extraFieldsCollection[$headerId])) {
/**
* @var WinZipAesEntryExtraField $field
*/
$field = $this->extraFieldsCollection[$headerId];
if (self::METHOD_WINZIP_AES === $this->getMethod()) {
$this->setMethod($field === null ? self::UNKNOWN : $field->getMethod());
}
unset($this->extraFieldsCollection[$headerId]);
}
$this->password = null;
return $this;
}
/**
* Sets the encryption flag for this ZIP entry.
*
* @param bool $encrypted
* @return ZipEntry
*/
public function setEncrypted($encrypted)
{
$encrypted = (bool)$encrypted;
$this->setGeneralPurposeBitFlag(self::GPBF_ENCRYPTED, $encrypted);
return $this;
}
/**
* Returns the compression method for this entry.
*
* @return int
*/
public function getMethod()
{
$isInit = $this->isInit(self::BIT_METHOD);
return $isInit ?
$this->method & 0xffff :
self::UNKNOWN;
}
/**
* Sets the compression method for this entry.
*
* @param int $method
* @return ZipEntry
* @throws ZipException If method is not STORED, DEFLATED, BZIP2 or UNKNOWN.
*/
public function setMethod($method)
{
if ($method === self::UNKNOWN) {
$this->method = $method;
$this->setInit(self::BIT_METHOD, false);
return $this;
}
if (0x0000 > $method || $method > 0xffff) {
throw new ZipException('method out of range: ' . $method);
}
switch ($method) {
case self::METHOD_WINZIP_AES:
case ZipFileInterface::METHOD_STORED:
case ZipFileInterface::METHOD_DEFLATED:
case ZipFileInterface::METHOD_BZIP2:
$this->method = $method;
$this->setInit(self::BIT_METHOD, true);
break;
default:
throw new ZipException($this->name . " (unsupported compression method $method)");
}
return $this;
}
/**
* Get Unix Timestamp
*
* @return int
*/
public function getTime()
{
if (!$this->isInit(self::BIT_DATE_TIME)) {
return self::UNKNOWN;
}
return DateTimeConverter::toUnixTimestamp($this->getDosTime());
}
/**
* Get Dos Time
*
* @return int
*/
public function getDosTime()
{
return $this->dosTime;
}
/**
* Set Dos Time
* @param int $dosTime
* @throws ZipException
*/
public function setDosTime($dosTime)
{
$dosTime = sprintf('%u', $dosTime);
if (0x00000000 > $dosTime || $dosTime > 0xffffffff) {
throw new ZipException('DosTime out of range');
}
$this->dosTime = $dosTime;
$this->setInit(self::BIT_DATE_TIME, true);
}
/**
* Set time from unix timestamp.
*
* @param int $unixTimestamp
* @return ZipEntry
* @throws ZipException
*/
public function setTime($unixTimestamp)
{
$known = self::UNKNOWN != $unixTimestamp;
if ($known) {
$this->dosTime = DateTimeConverter::toDosTime($unixTimestamp);
} else {
$this->dosTime = 0;
}
$this->setInit(self::BIT_DATE_TIME, $known);
return $this;
}
/**
* Returns the external file attributes.
*
* @return int The external file attributes.
*/
public function getExternalAttributes()
{
if (!$this->isInit(self::BIT_EXTERNAL_ATTR)) {
return $this->isDirectory() ? 0x10 : 0;
}
return $this->externalAttributes;
}
/**
* Sets the external file attributes.
*
* @param int $externalAttributes the external file attributes.
* @return ZipEntry
*/
public function setExternalAttributes($externalAttributes)
{
$known = self::UNKNOWN != $externalAttributes;
if ($known) {
$this->externalAttributes = $externalAttributes;
} else {
$this->externalAttributes = 0;
}
$this->setInit(self::BIT_EXTERNAL_ATTR, $known);
return $this;
}
/**
* Returns true if and only if this ZIP entry represents a directory entry
* (i.e. end with '/').
*
* @return bool
*/
public function isDirectory()
{
return StringUtil::endsWith($this->name, '/');
}
/**
* @return ExtraFieldsCollection
*/
public function &getExtraFieldsCollection()
{
return $this->extraFieldsCollection;
}
/**
* Returns a protective copy of the serialized Extra Fields.
* @return string
* @throws ZipException
*/
public function getExtra()
{
return ExtraFieldsFactory::createSerializedData($this->extraFieldsCollection);
}
/**
* Sets the serialized Extra Fields by making a protective copy.
* Note that this method parses the serialized Extra Fields according to
* the ZIP File Format Specification and limits its size to 64 KB.
* Therefore, this property cannot not be used to hold arbitrary
* (application) data.
* Consider storing such data in a separate entry instead.
*
* @param string $data The byte array holding the serialized Extra Fields.
* @throws ZipException if the serialized Extra Fields exceed 64 KB
*/
public function setExtra($data)
{
$this->extraFieldsCollection = ExtraFieldsFactory::createExtraFieldCollections($data, $this);
}
/**
* Returns comment entry
*
* @return string
*/
public function getComment()
{
return null !== $this->comment ? $this->comment : "";
}
/**
* Set entry comment.
*
* @param $comment
* @return ZipEntry
* @throws ZipException
*/
public function setComment($comment)
{
if ($comment !== null) {
$commentLength = strlen($comment);
if (0x0000 > $commentLength || $commentLength > 0xffff) {
throw new ZipException("Comment too long");
}
}
$this->setGeneralPurposeBitFlag(self::GPBF_UTF8, true);
$this->comment = $comment;
return $this;
}
/**
* @return bool
*/
public function isDataDescriptorRequired()
{
return ($this->getCrc() | $this->getCompressedSize() | $this->getSize()) == self::UNKNOWN;
}
/**
* Return crc32 content or 0 for WinZip AES v2
*
* @return int
*/
public function getCrc()
{
return $this->crc;
}
/**
* Set crc32 content.
*
* @param int $crc
* @return ZipEntry
*/
public function setCrc($crc)
{
$this->crc = $crc;
$this->setInit(self::BIT_CRC, true);
return $this;
}
/**
* @return string
*/
public function getPassword()
{
return $this->password;
}
/**
* Set password and encryption method from entry
*
* @param string $password
* @param null|int $encryptionMethod
* @return ZipEntry
* @throws ZipException
*/
public function setPassword($password, $encryptionMethod = null)
{
$this->password = $password;
if ($encryptionMethod !== null) {
$this->setEncryptionMethod($encryptionMethod);
}
if (!empty($this->password)) {
$this->setEncrypted(true);
} else {
$this->disableEncryption();
}
return $this;
}
/**
* @return int
*/
public function getEncryptionMethod()
{
return $this->encryptionMethod;
}
/**
* Set encryption method
*
* @see ZipFileInterface::ENCRYPTION_METHOD_TRADITIONAL
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_128
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_192
* @see ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_256
*
* @param int $encryptionMethod
* @return ZipEntry
* @throws ZipException
*/
public function setEncryptionMethod($encryptionMethod)
{
if (null !== $encryptionMethod) {
if (
$encryptionMethod !== ZipFileInterface::ENCRYPTION_METHOD_TRADITIONAL
&& $encryptionMethod !== ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_128
&& $encryptionMethod !== ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_192
&& $encryptionMethod !== ZipFileInterface::ENCRYPTION_METHOD_WINZIP_AES_256
) {
throw new ZipException('Invalid encryption method');
}
$this->encryptionMethod = $encryptionMethod;
}
return $this;
}
/**
* @return int
*/
public function getCompressionLevel()
{
return $this->compressionLevel;
}
/**
* @param int $compressionLevel
* @return ZipEntry
*/
public function setCompressionLevel($compressionLevel = ZipFileInterface::LEVEL_DEFAULT_COMPRESSION)
{
if ($compressionLevel < ZipFileInterface::LEVEL_DEFAULT_COMPRESSION ||
$compressionLevel > ZipFileInterface::LEVEL_BEST_COMPRESSION
) {
throw new InvalidArgumentException('Invalid compression level. Minimum level ' .
ZipFileInterface::LEVEL_DEFAULT_COMPRESSION . '. Maximum level ' . ZipFileInterface::LEVEL_BEST_COMPRESSION);
}
$this->compressionLevel = $compressionLevel;
return $this;
}
/**
* Clone extra fields
*/
public function __clone()
{
$this->extraFieldsCollection = clone $this->extraFieldsCollection;
}
}