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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator\File;
use Zend\Validator\Exception;
/**
* Validator for the crc32 hash of given files
*/
class Crc32 extends Hash
{
/**
* @const string Error constants
*/
const DOES_NOT_MATCH = 'fileCrc32DoesNotMatch';
const NOT_DETECTED = 'fileCrc32NotDetected';
const NOT_FOUND = 'fileCrc32NotFound';
/**
* @var array Error message templates
*/
protected $messageTemplates = array(
self::DOES_NOT_MATCH => "File does not match the given crc32 hashes",
self::NOT_DETECTED => "A crc32 hash could not be evaluated for the given file",
self::NOT_FOUND => "File is not readable or does not exist",
);
/**
* Options for this validator
*
* @var string
*/
protected $options = array(
'algorithm' => 'crc32',
'hash' => null,
);
/**
* Returns all set crc32 hashes
*
* @return array
*/
public function getCrc32()
{
return $this->getHash();
}
/**
* Sets the crc32 hash for one or multiple files
*
* @param string|array $options
* @return Crc32 Provides a fluent interface
*/
public function setCrc32($options)
{
$this->setHash($options);
return $this;
}
/**
* Adds the crc32 hash for one or multiple files
*
* @param string|array $options
* @return Crc32 Provides a fluent interface
*/
public function addCrc32($options)
{
$this->addHash($options);
return $this;
}
/**
* Returns true if and only if the given file confirms the set hash
*
* @param string|array $value Filename to check for hash
* @param array $file File data from \Zend\File\Transfer\Transfer (optional)
* @return bool
*/
public function isValid($value, $file = null)
{
if (is_string($value) && is_array($file)) {
// Legacy Zend\Transfer API support
$filename = $file['name'];
$file = $file['tmp_name'];
} elseif (is_array($value)) {
if (!isset($value['tmp_name']) || !isset($value['name'])) {
throw new Exception\InvalidArgumentException(
'Value array must be in $_FILES format'
);
}
$file = $value['tmp_name'];
$filename = $value['name'];
} else {
$file = $value;
$filename = basename($file);
}
$this->setValue($filename);
// Is file readable ?
if (empty($file) || false === stream_resolve_include_path($file)) {
$this->error(self::NOT_FOUND);
return false;
}
$hashes = array_unique(array_keys($this->getHash()));
$filehash = hash_file('crc32', $file);
if ($filehash === false) {
$this->error(self::NOT_DETECTED);
return false;
}
foreach ($hashes as $hash) {
if ($filehash === $hash) {
return true;
}
}
$this->error(self::DOES_NOT_MATCH);
return false;
}
}