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Began work on the core_image.php reader

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Deltik
2020-03-15 14:57:43 -05:00
committed by Nick Liu
parent 6aeee58ac2
commit 20dbdefb77
6 changed files with 9015 additions and 4039 deletions
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101
e107_handlers/e_file_inspector.php Normal file
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<?php
/**
* e107 website system
*
* Copyright (C) 2008-2020 e107 Inc (e107.org)
* Released under the terms and conditions of the
* GNU General Public License (http://www.gnu.org/licenses/gpl.txt)
*/
require_once("e_file_inspector_interface.php");
abstract class e_file_inspector implements e_file_inspector_interface
{
/**
* Check the integrity of the provided path
*
* @param $path string Relative path of the file to look up
* @param $version string The desired software release to match.
* Leave blank for the latest version.
* Do not prepend the version number with "v".
* @return int Validation code (see the constants of this class)
*/
public function validate($path, $version = null)
{
$absolutePath = realpath($path);
$actualChecksum = $this->checksumPath($absolutePath);
$dbChecksum = $this->getChecksum($path, $version);
if ($dbChecksum === false) return self::VALIDATION_IGNORE;
if (!file_exists($absolutePath)) return self::VALIDATION_MISSING;
if ($this->isInsecure($path)) return self::VALIDATION_INSECURE;
if ($actualChecksum === false) return self::VALIDATION_INCALCULABLE;
if ($actualChecksum === $dbChecksum) return self::VALIDATION_PASS;
foreach ($this->getChecksums($path) as $dbVersion => $dbChecksum)
{
if (version_compare($dbVersion, $version, ">=")) continue;
if ($dbChecksum === $actualChecksum) return self::VALIDATION_OLD;
}
return self::VALIDATION_FAIL;
}
/**
* Get the file integrity hash for the provided path and version
*
* @param $path string Relative path of the file to look up
* @param $version string The software release version corresponding to the file hash.
* Leave blank for the latest version.
* Do not prepend the version number with "v".
* @return string|bool The database hash for the path and version specified. FALSE if the record does not exist.
*/
public function getChecksum($path, $version = null)
{
$checksums = $this->getChecksums($path);
return isset($checksums[$version]) ? $checksums[$version] : false;
}
/**
* Calculate the hash of a path to compare with the hash database
*
* @param $absolutePath string Absolute path of the file to hash
* @return string|bool The actual hash for the path. FALSE if the hash was incalculable.
*/
public function checksumPath($absolutePath)
{
if (!is_file($absolutePath) || !is_readable($absolutePath)) return false;
return $this->checksum(file_get_contents($absolutePath));
}
/**
* Calculate the hash of a string, which would be used to compare with the hash database
*
* @param $content string Full content to hash
* @return string
*/
public function checksum($content)
{
return md5(str_replace(array(chr(13),chr(10)), "", $content));
}
/**
* Get the matching version of the provided path
*
* Useful for looking up the versions of old files that no longer exist in the latest image
*
* @param $path string Relative path of the file to look up
* @return string|bool PHP-standardized version of the file. FALSE if there is no match.
*/
public function getVersion($path)
{
$actualChecksum = $this->checksumPath($path);
foreach ($this->getChecksums($path) as $dbVersion => $dbChecksum)
{
if ($actualChecksum === $dbChecksum) return $dbVersion;
}
return false;
}
}