PEHeaderExtract.class.php

<?php


class PEHeaderExtract {

  private $filename = '';

  public $major = 0;
  public $minor = 0;
  public $revision = 0;
  public $build = 0;

  function __construct($filename) {
    if (file_exists($filename)) {
      $this->filename = $filename;
      if (!$this->GetFileVersion()) {
        throw new Exception('Could not extract version info');
      }
    } else {
      throw new Exception('File does not exists');
    }
  }


  private function GetFileVersion() {
    $handle = fopen($this->filename, 'rb');
    if (!$handle) return FALSE;
    $Header = fread($handle, 64);
    if (substr($Header, 0, 2) != 'MZ') return FALSE;
    $PEOffset = unpack("V", substr($Header, 60, 4));
    if ($PEOffset[1] < 64) return FALSE;
    fseek($handle, $PEOffset[1], SEEK_SET);
    $Header = fread($handle, 24);
    if (substr($Header, 0, 2) != 'PE') return FALSE;
    $Machine = unpack("v", substr($Header, 4, 2));
    if ($Machine[1] != 332) return FALSE;
    $NoSections = unpack("v", substr($Header, 6, 2));
    $OptHdrSize = unpack("v", substr($Header, 20, 2));
    fseek($handle, $OptHdrSize[1], SEEK_CUR);
    $ResFound = FALSE;
    for ($x = 0; $x < $NoSections[1]; $x++) {
      $SecHdr = fread($handle, 40);
      if (substr($SecHdr, 0, 5) == '.rsrc') { //resource section
        $ResFound = TRUE;
        break;
      }
    }
    if (!$ResFound) return FALSE;
    $InfoVirt = unpack("V", substr($SecHdr, 12, 4));
    $InfoSize = unpack("V", substr($SecHdr, 16, 4));
    $InfoOff = unpack("V", substr($SecHdr, 20, 4));
    fseek($handle, $InfoOff[1], SEEK_SET);
    $Info = fread($handle, $InfoSize[1]);
    $NumDirs = unpack("v", substr($Info, 14, 2));
    $NumDirs[1] = $NumDirs[1] + 5;
    $InfoFound = FALSE;
    for ($x = 0; $x < $NumDirs[1]; $x++) {
      $Type = unpack("V", substr($Info, ($x * 8) + 16, 4));
      if ($Type[1] == 16) { //FILEINFO resource
        $InfoFound = TRUE;
        $SubOff = unpack("V", substr($Info, ($x * 8) + 20, 4));
        break;
      }
    }
    if (!$InfoFound) return FALSE;
    $SubOff[1] &= 0x7fffffff;
    $InfoOff = unpack("V", substr($Info, $SubOff[1] + 20, 4)); //offset of first FILEINFO
    $InfoOff[1] &= 0x7fffffff;
    $InfoOff = unpack("V", substr($Info, $InfoOff[1] + 20, 4)); //offset to data
    $DataOff = unpack("V", substr($Info, $InfoOff[1], 4));
    $DataSize = unpack("V", substr($Info, $InfoOff[1] + 4, 4));
    $CodePage = unpack("V", substr($Info, $InfoOff[1] + 8, 4));
    $DataOff[1] -= $InfoVirt[1];
    $Version = unpack("v4", substr($Info, $DataOff[1] + 48, 8));
    $x = $Version[2];
    $Version[2] = $Version[1];
    $Version[1] = $x;
    $x = $Version[4];
    $Version[4] = $Version[3];
    $Version[3] = $x;
    $this->major = $Version[1];
    $this->minor = $Version[2];
    $this->revision = $Version[3];
    $this->build = $Version[4];
    return true;

  }

}