phpop3clean.demo.partial_md5_match_checker.php

一个基于页面实现的pop客户端程序

<?php
/////////////////////////////////////////////////////////////////
/// phPOP3clean() by James Heinrich <[e-mail]>    //
//  available at http://phpop3clean.sourceforge.net            //
/////////////////////////////////////////////////////////////////

$pattern = '17435|';

@list($basesize, $garbagebytelist) = explode('|', $pattern);
$garbagebytes = explode(';', $garbagebytelist);
$AllFileContents = array();
$dir = 'c:\\virii\\';
if ($dh = opendir($dir)) {
	while (($file = readdir($dh)) !== false) {
		if (eregi('\.dat$', $file)) {
			$rawfiledata = file_get_contents($dir.$file);
			$standardizeddata = $rawfiledata;
			if ($basesize) {
				$standardizeddata = substr($standardizeddata, 0, $basesize);
			}
			foreach ($garbagebytes as $byteaddr) {
				if ($byteaddr) {
					if (ereg('^([0-9]+)\-([0-9]+)$', $byteaddr, $matches) && ($matches[2] > $matches[1])) {
						for ($i = $matches[1]; $i <= $matches[2]; $i++) {
							$standardizeddata{$i} = "\x00";
						}
					} else {
						$standardizeddata{$byteaddr} = "\x00";
					}
					$standardizeddata{$byteaddr} = "\x00";
				}
			}
			$AllFileContents[$file] = $standardizeddata;
			$fp = fopen(str_replace('.dat', '.new', $dir.$file), 'wb');
			fwrite($fp, $standardizeddata);
			fclose($fp);
		}
	}
	closedir($dh);
}
echo 'Scanned '.count($AllFileContents).' files<hr>';

echo '<hr><pre>';
$prevfile = '';
$prevmd5  = '';
$automask = '';
foreach ($AllFileContents as $filename => $filedata) {
	$thismd5 = md5($filedata);
	echo $thismd5.' = '.$filename.'<br>';
	if ($prevmd5 && ($thismd5 != $prevmd5)) {
		$maskstart = min(filesize($dir.str_replace('.dat', '.new', $filename)), filesize($dir.str_replace('.dat', '.new', $prevfile)));
		$commandline = substr($dir, 0, 2).' && cd "'.substr($dir, 2).'" && copy /y "c:\\program files\\support tools\\bindiff.exe" . > nul && bindiff /d0 '.str_replace('.dat', '.new', $prevfile).' '.str_replace('.dat', '.new', $filename);;
		$bindiffoutput = `$commandline`;
		$ArrayOfTextDifferences = explode('===============================================================================', $bindiffoutput);
		array_shift($ArrayOfTextDifferences);
		$IgnoreBytes = array();
		$ArrayOfTextDifferences2 = array();
		foreach ($ArrayOfTextDifferences as $DifferenceLine) {
			$lines = explode("\n", $DifferenceLine);
			foreach ($lines as $line) {
				$line = trim($line);
				if ($line) {
					$ArrayOfTextDifferences2[] = $line;
				}
			}
		}
		foreach ($ArrayOfTextDifferences2 as $DifferenceLine) {
			if (eregi('^([0-9A-F]{8})([ ]+)<(([0-9A-F]{2}[ ]?)+)>[ ]+[^ ]+([ ]+)<(([0-9A-F]{2}[ ]?)+)>[ ]+[^ ]+$', $DifferenceLine, $matches)) {
				$startOffset = hexdec($matches[1]);
				$paddingBytes = (strlen($matches[2]) - 1) / 3;

				$diffByteValuesArray = explode(' ', $matches[3]);
				if (count($diffByteValuesArray) > 4) {
					$maskstart = $startOffset;
					break;
				}
				for ($i = 0; $i < count($diffByteValuesArray); $i++) {
					$IgnoreBytes[] = ($startOffset + $paddingBytes + $i);
				}
			}
		}
		$automask = $maskstart.'|'.implode(';', $IgnoreBytes);

		echo '<hr><b>New mask:</b><br><tt>'.$automask.'</tt><hr>';
	}
	$prevfile = $filename;
	$prevmd5  = $thismd5;
}
echo '</pre>';
?>