Issues in gif.php (master) - Issues in master - XoopsModules25x/mylinks - Measure and Improve Code Quality continuously with Scrutinizer

Issues (661)

Security Analysis not enabled

Cross-Site Scripting

Cross-Site Scripting enables an attacker to inject code into the response of a web-request that is viewed by other users. It can for example be used to bypass access controls, or even to take over other users' accounts.

File Exposure

File Exposure allows an attacker to gain access to local files that he should not be able to access. These files can for example include database credentials, or other configuration files.

File Manipulation

File Manipulation enables an attacker to write custom data to files. This potentially leads to injection of arbitrary code on the server.

Object Injection

Object Injection enables an attacker to inject an object into PHP code, and can lead to arbitrary code execution, file exposure, or file manipulation attacks.

Code Injection

Code Injection enables an attacker to execute arbitrary code on the server.

Response Splitting

Response Splitting can be used to send arbitrary responses.

File Inclusion

File Inclusion enables an attacker to inject custom files into PHP's file loading mechanism, either explicitly passed to include, or for example via PHP's auto-loading mechanism.

Command Injection

Command Injection enables an attacker to inject a shell command that is execute with the privileges of the web-server. This can be used to expose sensitive data, or gain access of your server.

SQL Injection

SQL Injection enables an attacker to execute arbitrary SQL code on your database server gaining access to user data, or manipulating user data.

XPath Injection

XPath Injection enables an attacker to modify the parts of XML document that are read. If that XML document is for example used for authentication, this can lead to further vulnerabilities similar to SQL Injection.

LDAP Injection

LDAP Injection enables an attacker to inject LDAP statements potentially granting permission to run unauthorized queries, or modify content inside the LDAP tree.

Header Injection

Other Vulnerability

This category comprises other attack vectors such as manipulating the PHP runtime, loading custom extensions, freezing the runtime, or similar.

Regex Injection

Regex Injection enables an attacker to execute arbitrary code in your PHP process.

XML Injection

XML Injection enables an attacker to read files on your local filesystem including configuration files, or can be abused to freeze your web-server process.

Variable Injection

Variable Injection enables an attacker to overwrite program variables with custom data, and can lead to further vulnerabilities.

Unfortunately, the security analysis is currently not available for your project. If you are a non-commercial open-source project, please contact support to gain access.

fpdf/gif.php (9 issues)

Labels

Severity

Major 9

Upgrade to new PHP Analysis Engine

These results are based on our legacy PHP analysis, consider migrating to our new PHP analysis engine instead. Learn more

<?php
///////////////////////////////////////////////////////////////////////////////////////////////////
// GIF Util - (C) 2003 Yamasoft (S/C)
// http://www.yamasoft.com
// All Rights Reserved
// This file can be frelly copied, distributed, modified, updated by anyone under the only
// condition to leave the original address (Yamasoft, http://www.yamasoft.com) and this header.
///////////////////////////////////////////////////////////////////////////////////////////////////
// <gif>  = gif_loadFile(filename, [index])
// <bool> = gif_getSize(<gif> or filename, &width, &height)
// <bool> = gif_outputAsPng(<gif>, filename, [bgColor])
// <bool> = gif_outputAsBmp(<gif>, filename, [bgcolor])
// <bool> = gif_outputAsJpeg(<gif>, filename, [bgcolor]) - Requires cjpeg
///////////////////////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////////////////////
if (!defined('XOOPS_ROOT_PATH')) {
  die('XOOPS root path not defined');
}

function gif_loadFile($lpszFileName, $iIndex = 0)
{
  $gif = new CGIF();

  if(!$gif->loadFile($lpszFileName, $iIndex)) {
    return false;
  }

  return $gif;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

function gif_outputAsBmp($gif, $lpszFileName, $bgColor = -1)
{
  if(!isSet($gif) || (@get_class($gif) <> 'cgif') || !$gif->loaded() || ($lpszFileName == '')) {
    return false;
  }

  $fd = $gif->getBmp($bgColor);
  if(strlen($fd) <= 0) {
    return false;
  }

  if(!($fh = @fOpen($lpszFileName, 'wb'))) {
    return false;
  }
  @fWrite($fh, $fd, strlen($fd));
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
  @fFlush($fh);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
  @fClose($fh);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

  return true;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

function gif_outputAsPng($gif, $lpszFileName, $bgColor = -1)
{
  if(!isSet($gif) || (@get_class($gif) <> 'cgif') || !$gif->loaded() || ($lpszFileName == '')) {
    return false;
  }

  $fd = $gif->getPng($bgColor);
  if(strlen($fd) <= 0) {
    return false;
  }

  if(!($fh = @fOpen($lpszFileName, 'wb'))) {
    return false;
  }
  @fWrite($fh, $fd, strlen($fd));
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
  @fFlush($fh);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
  @fClose($fh);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

  return true;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

function gif_outputAsJpeg($gif, $lpszFileName, $bgColor = -1)
{
  if(gif_outputAsBmp($gif, "$lpszFileName.bmp", $gbColor)) {
    exec("cjpeg $lpszFileName.bmp >$lpszFileName 2>/dev/null");
    @unLink("$lpszFileName.bmp");
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

    if(@file_exists($lpszFileName)) {
      if(@fileSize($lpszFileName) > 0) {
        return true;
      }

      @unLink($lpszFileName);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
    }
  }

  return false;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

function gif_getSize($gif, &$width, &$height)
{
  if(isSet($gif) && (@get_class($gif) == 'cgif') && $gif->loaded()) {
    $width  = $gif->width();
    $height = $gif->height();
  }
  else if(@file_exists($gif)) {
    $myGIF = new CGIF();
    if(!$myGIF->getSize($gif, $width, $height)) {
      return false;
    }
  }
  else {
    return false;
  }

  return true;
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIFLZW
{
  var $MAX_LZW_BITS;
  var $Fresh, $CodeSize, $SetCodeSize, $MaxCode, $MaxCodeSize, $FirstCode, $OldCode;
  var $ClearCode, $EndCode, $Next, $Vals, $Stack, $sp, $Buf, $CurBit, $LastBit, $Done, $LastByte;

  ///////////////////////////////////////////////////////////////////////////

  // CONSTRUCTOR
  function CGIFLZW()
  {
    $this->MAX_LZW_BITS = 12;
    unSet($this->Next);
    unSet($this->Vals);
    unSet($this->Stack);
    unSet($this->Buf);

    $this->Next  = range(0, (1 << $this->MAX_LZW_BITS)       - 1);
    $this->Vals  = range(0, (1 << $this->MAX_LZW_BITS)       - 1);
    $this->Stack = range(0, (1 << ($this->MAX_LZW_BITS + 1)) - 1);
    $this->Buf   = range(0, 279);
  }

  ///////////////////////////////////////////////////////////////////////////

  function deCompress($data, &$datLen)
  {
    $stLen  = strlen($data);
    $datLen = 0;
    $ret    = '';

    // INITIALIZATION
    $this->LZWCommand($data, true);

    while(($iIndex = $this->LZWCommand($data, false)) >= 0) {
      $ret .= chr($iIndex);
    }

    $datLen = $stLen - strlen($data);

    if($iIndex != -2) {
      return false;
    }

    return $ret;
  }

  ///////////////////////////////////////////////////////////////////////////

  function LZWCommand(&$data, $bInit)
  {
    if($bInit) {
      $this->SetCodeSize = ord($data{0});
      $data = substr($data, 1);

      $this->CodeSize    = $this->SetCodeSize + 1;
      $this->ClearCode   = 1 << $this->SetCodeSize;
      $this->EndCode     = $this->ClearCode + 1;
      $this->MaxCode     = $this->ClearCode + 2;
      $this->MaxCodeSize = $this->ClearCode << 1;

      $this->GetCode($data, $bInit);

      $this->Fresh = 1;
      for($i = 0; $i < $this->ClearCode; $i++) {
        $this->Next[$i] = 0;
        $this->Vals[$i] = $i;
      }

      for(; $i < (1 << $this->MAX_LZW_BITS); $i++) {
        $this->Next[$i] = 0;
        $this->Vals[$i] = 0;
      }

      $this->sp = 0;

      return 1;
    }

    if($this->Fresh) {
      $this->Fresh = 0;
      do {
        $this->FirstCode = $this->GetCode($data, $bInit);
        $this->OldCode   = $this->FirstCode;
      }
      while($this->FirstCode == $this->ClearCode);

      return $this->FirstCode;
    }

    if($this->sp > 0) {
      $this->sp--;

      return $this->Stack[$this->sp];
    }

    while(($Code = $this->GetCode($data, $bInit)) >= 0) {
      if($Code == $this->ClearCode) {
        for($i = 0; $i < $this->ClearCode; $i++) {
          $this->Next[$i] = 0;
          $this->Vals[$i] = $i;
        }

        for(; $i < (1 << $this->MAX_LZW_BITS); $i++) {
          $this->Next[$i] = 0;
          $this->Vals[$i] = 0;
        }

        $this->CodeSize    = $this->SetCodeSize + 1;
        $this->MaxCodeSize = $this->ClearCode << 1;
        $this->MaxCode     = $this->ClearCode + 2;
        $this->sp          = 0;
        $this->FirstCode   = $this->GetCode($data, $bInit);
        $this->OldCode     = $this->FirstCode;

        return $this->FirstCode;
      }

      if($Code == $this->EndCode) {
        return -2;
      }

      $InCode = $Code;
      if($Code >= $this->MaxCode) {
        $this->Stack[$this->sp] = $this->FirstCode;
        $this->sp++;
        $Code = $this->OldCode;
      }

      while($Code >= $this->ClearCode) {
        $this->Stack[$this->sp] = $this->Vals[$Code];
        $this->sp++;

        if($Code == $this->Next[$Code]) // Circular table entry, big GIF Error!
          return -1;

        $Code = $this->Next[$Code];
      }

      $this->FirstCode = $this->Vals[$Code];
      $this->Stack[$this->sp] = $this->FirstCode;
      $this->sp++;

      if(($Code = $this->MaxCode) < (1 << $this->MAX_LZW_BITS)) {
        $this->Next[$Code] = $this->OldCode;
        $this->Vals[$Code] = $this->FirstCode;
        $this->MaxCode++;

        if(($this->MaxCode >= $this->MaxCodeSize) && ($this->MaxCodeSize < (1 << $this->MAX_LZW_BITS))) {
          $this->MaxCodeSize *= 2;
          $this->CodeSize++;
        }
      }

      $this->OldCode = $InCode;
      if($this->sp > 0) {
        $this->sp--;

        return $this->Stack[$this->sp];
      }
    }

    return $Code;
  }

  ///////////////////////////////////////////////////////////////////////////

  function GetCode(&$data, $bInit)
  {
    if($bInit) {
      $this->CurBit   = 0;
      $this->LastBit  = 0;
      $this->Done     = 0;
      $this->LastByte = 2;

      return 1;
    }

    if(($this->CurBit + $this->CodeSize) >= $this->LastBit) {
      if($this->Done) {
        if($this->CurBit >= $this->LastBit) {
          // Ran off the end of my bits
          return 0;
        }

        return -1;
      }

      $this->Buf[0] = $this->Buf[$this->LastByte - 2];
      $this->Buf[1] = $this->Buf[$this->LastByte - 1];

      $Count = ord($data{0});
      $data  = substr($data, 1);

      if($Count) {
        for($i = 0; $i < $Count; $i++) {
          $this->Buf[2 + $i] = ord($data{$i});
        }
        $data = substr($data, $Count);
      }
      else {
        $this->Done = 1;
      }

      $this->LastByte = 2 + $Count;
      $this->CurBit   = ($this->CurBit - $this->LastBit) + 16;
      $this->LastBit  = (2 + $Count) << 3;
    }

    $iRet = 0;
    for($i = $this->CurBit, $j = 0; $j < $this->CodeSize; $i++, $j++) {
      $iRet |= (($this->Buf[intval($i / 8)] & (1 << ($i % 8))) != 0) << $j;
    }

    $this->CurBit += $this->CodeSize;

    return $iRet;
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIFCOLORTABLE
{
  var $m_nColors;
  var $m_arColors;

  ///////////////////////////////////////////////////////////////////////////

  // CONSTRUCTOR
  function CGIFCOLORTABLE()
  {
    unSet($this->m_nColors);
    unSet($this->m_arColors);
  }

  ///////////////////////////////////////////////////////////////////////////

  function load($lpData, $num)
  {
    $this->m_nColors  = 0;
    $this->m_arColors = array();

    for($i = 0; $i < $num; $i++) {
      $rgb = substr($lpData, $i * 3, 3);
      if(strlen($rgb) < 3) {
        return false;
      }

      $this->m_arColors[] = (ord($rgb{2}) << 16) + (ord($rgb{1}) << 8) + ord($rgb{0});
      $this->m_nColors++;
    }

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function toString()
  {
    $ret = '';

    for($i = 0; $i < $this->m_nColors; $i++) {
      $ret .=
          chr($this->m_arColors[$i] & 0x000000FF) . // R
          chr(($this->m_arColors[$i] & 0x0000FF00) >>  8) . // G
        chr(($this->m_arColors[$i] & 0x00FF0000) >> 16);  // B
    }

    return $ret;
  }

  ///////////////////////////////////////////////////////////////////////////

  function toRGBQuad()
  {
    $ret = '';

    for($i = 0; $i < $this->m_nColors; $i++) {
      $ret .=
        chr(($this->m_arColors[$i] & 0x00FF0000) >> 16) . // B
        chr(($this->m_arColors[$i] & 0x0000FF00) >>  8) . // G
        chr($this->m_arColors[$i] & 0x000000FF) . // R
        "\x00";
    }

    return $ret;
  }

  ///////////////////////////////////////////////////////////////////////////

  function colorIndex($rgb)
  {
    $rgb  = intval($rgb) & 0xFFFFFF;
    $r1   = ($rgb & 0x0000FF);
    $g1   = ($rgb & 0x00FF00) >>  8;
    $b1   = ($rgb & 0xFF0000) >> 16;
    $idx  = -1;

    for($i = 0; $i < $this->m_nColors; $i++) {
      $r2 = ($this->m_arColors[$i] & 0x000000FF);
      $g2 = ($this->m_arColors[$i] & 0x0000FF00) >>  8;
      $b2 = ($this->m_arColors[$i] & 0x00FF0000) >> 16;
      $d  = abs($r2 - $r1) + abs($g2 - $g1) + abs($b2 - $b1);

      if(($idx == -1) || ($d < $dif)) {
        $idx = $i;
        $dif = $d;
      }
    }

    return $idx;
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIFFILEHEADER
{
  var $m_lpVer;
  var $m_nWidth;
  var $m_nHeight;
  var $m_bGlobalClr;
  var $m_nColorRes;
  var $m_bSorted;
  var $m_nTableSize;
  var $m_nBgColor;
  var $m_nPixelRatio;
  var $m_colorTable;

  ///////////////////////////////////////////////////////////////////////////

  // CONSTRUCTOR
  function CGIFFILEHEADER()
  {
    unSet($this->m_lpVer);
    unSet($this->m_nWidth);
    unSet($this->m_nHeight);
    unSet($this->m_bGlobalClr);
    unSet($this->m_nColorRes);
    unSet($this->m_bSorted);
    unSet($this->m_nTableSize);
    unSet($this->m_nBgColor);
    unSet($this->m_nPixelRatio);
    unSet($this->m_colorTable);
  }

  ///////////////////////////////////////////////////////////////////////////

  function load($lpData, &$hdrLen)
  {
    $hdrLen = 0;

    $this->m_lpVer = substr($lpData, 0, 6);
    if(($this->m_lpVer <> 'GIF87a') && ($this->m_lpVer <> 'GIF89a')) {
      return false;
    }

    $this->m_nWidth  = $this->w2i(substr($lpData, 6, 2));
    $this->m_nHeight = $this->w2i(substr($lpData, 8, 2));
    if(!$this->m_nWidth || !$this->m_nHeight) {
      return false;
    }

    $b = ord(substr($lpData, 10, 1));
    $this->m_bGlobalClr  = ($b & 0x80) ? true : false;
    $this->m_nColorRes   = ($b & 0x70) >> 4;
    $this->m_bSorted     = ($b & 0x08) ? true : false;
    $this->m_nTableSize  = 2 << ($b & 0x07);
    $this->m_nBgColor    = ord(substr($lpData, 11, 1));
    $this->m_nPixelRatio = ord(substr($lpData, 12, 1));
    $hdrLen = 13;

    if($this->m_bGlobalClr) {
      $this->m_colorTable = new CGIFCOLORTABLE();
      if(!$this->m_colorTable->load(substr($lpData, $hdrLen), $this->m_nTableSize)) {
        return false;
      }
      $hdrLen += 3 * $this->m_nTableSize;
    }

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function w2i($str)
  {
    return ord(substr($str, 0, 1)) + (ord(substr($str, 1, 1)) << 8);
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIFIMAGEHEADER
{
  var $m_nLeft;
  var $m_nTop;
  var $m_nWidth;
  var $m_nHeight;
  var $m_bLocalClr;
  var $m_bInterlace;
  var $m_bSorted;
  var $m_nTableSize;
  var $m_colorTable;

  ///////////////////////////////////////////////////////////////////////////

  // CONSTRUCTOR
  function CGIFIMAGEHEADER()
  {
    unSet($this->m_nLeft);
    unSet($this->m_nTop);
    unSet($this->m_nWidth);
    unSet($this->m_nHeight);
    unSet($this->m_bLocalClr);
    unSet($this->m_bInterlace);
    unSet($this->m_bSorted);
    unSet($this->m_nTableSize);
    unSet($this->m_colorTable);
  }

  ///////////////////////////////////////////////////////////////////////////

  function load($lpData, &$hdrLen)
  {
    $hdrLen = 0;

    $this->m_nLeft   = $this->w2i(substr($lpData, 0, 2));
    $this->m_nTop    = $this->w2i(substr($lpData, 2, 2));
    $this->m_nWidth  = $this->w2i(substr($lpData, 4, 2));
    $this->m_nHeight = $this->w2i(substr($lpData, 6, 2));

    if(!$this->m_nWidth || !$this->m_nHeight) {
      return false;
    }

    $b = ord($lpData{8});
    $this->m_bLocalClr  = ($b & 0x80) ? true : false;
    $this->m_bInterlace = ($b & 0x40) ? true : false;
    $this->m_bSorted    = ($b & 0x20) ? true : false;
    $this->m_nTableSize = 2 << ($b & 0x07);
    $hdrLen = 9;

    if($this->m_bLocalClr) {
      $this->m_colorTable = new CGIFCOLORTABLE();
      if(!$this->m_colorTable->load(substr($lpData, $hdrLen), $this->m_nTableSize)) {
        return false;
      }
      $hdrLen += 3 * $this->m_nTableSize;
    }

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function w2i($str)
  {
    return ord(substr($str, 0, 1)) + (ord(substr($str, 1, 1)) << 8);
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIFIMAGE
{
  var $m_disp;
  var $m_bUser;
  var $m_bTrans;
  var $m_nDelay;
  var $m_nTrans;
  var $m_lpComm;
  var $m_gih;
  var $m_data;
  var $m_lzw;

  ///////////////////////////////////////////////////////////////////////////

  function CGIFIMAGE()
  {
    unSet($this->m_disp);
    unSet($this->m_bUser);
    unSet($this->m_bTrans);
    unSet($this->m_nDelay);
    unSet($this->m_nTrans);
    unSet($this->m_lpComm);
    unSet($this->m_data);
    $this->m_gih = new CGIFIMAGEHEADER();
    $this->m_lzw = new CGIFLZW();
  }

  ///////////////////////////////////////////////////////////////////////////

  function load($data, &$datLen)
  {
    $datLen = 0;

    while(true) {
      $b = ord($data{0});
      $data = substr($data, 1);
      $datLen++;

      switch($b) {
      case 0x21: // Extension
        if(!$this->skipExt($data, $len = 0)) {
          return false;
        }
        $datLen += $len;
        break;

      case 0x2C: // Image
        // LOAD HEADER & COLOR TABLE
        if(!$this->m_gih->load($data, $len = 0)) {
          return false;
        }
        $data = substr($data, $len);
        $datLen += $len;

        // ALLOC BUFFER
        if(!($this->m_data = $this->m_lzw->deCompress($data, $len = 0))) {
          return false;
        }
        $data = substr($data, $len);
        $datLen += $len;

        if($this->m_gih->m_bInterlace) {
          $this->deInterlace();
        }

        return true;

      case 0x3B: // EOF
      default:
        return false;
      }
    }

    return false;
  }

  ///////////////////////////////////////////////////////////////////////////

  function skipExt(&$data, &$extLen)
  {
    $extLen = 0;

    $b = ord($data{0});
    $data = substr($data, 1);
    $extLen++;

    switch($b) {
    case 0xF9: // Graphic Control
      $b = ord($data{1});
      $this->m_disp   = ($b & 0x1C) >> 2;
      $this->m_bUser  = ($b & 0x02) ? true : false;
      $this->m_bTrans = ($b & 0x01) ? true : false;
      $this->m_nDelay = $this->w2i(substr($data, 2, 2));
      $this->m_nTrans = ord($data{4});
      break;

    case 0xFE: // Comment
      $this->m_lpComm = substr($data, 1, ord($data{0}));
      break;

    case 0x01: // Plain text
      break;

    case 0xFF: // Application
      break;
    }

    // SKIP DEFAULT AS DEFS MAY CHANGE
    $b = ord($data{0});
    $data = substr($data, 1);
    $extLen++;
    while($b > 0) {
      $data = substr($data, $b);
      $extLen += $b;
      $b    = ord($data{0});
      $data = substr($data, 1);
      $extLen++;
    }

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function w2i($str)
  {
    return ord(substr($str, 0, 1)) + (ord(substr($str, 1, 1)) << 8);
  }

  ///////////////////////////////////////////////////////////////////////////

  function deInterlace()
  {
    $data = $this->m_data;

    for($i = 0; $i < 4; $i++) {
      switch($i) {
      case 0:
        $s = 8;
        $y = 0;
        break;

      case 1:
        $s = 8;
        $y = 4;
        break;

      case 2:
        $s = 4;
        $y = 2;
        break;

      case 3:
        $s = 2;
        $y = 1;
        break;
      }

      for(; $y < $this->m_gih->m_nHeight; $y += $s) {
        $lne = substr($this->m_data, 0, $this->m_gih->m_nWidth);
        $this->m_data = substr($this->m_data, $this->m_gih->m_nWidth);

        $data =
          substr($data, 0, $y * $this->m_gih->m_nWidth) .
          $lne .
          substr($data, ($y + 1) * $this->m_gih->m_nWidth);
      }
    }

    $this->m_data = $data;
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////

class CGIF
{
  var $m_gfh;
  var $m_lpData;
  var $m_img;
  var $m_bLoaded;

  ///////////////////////////////////////////////////////////////////////////

  // CONSTRUCTOR
  function CGIF()
  {
    $this->m_gfh     = new CGIFFILEHEADER();
    $this->m_img     = new CGIFIMAGE();
    $this->m_lpData  = '';
    $this->m_bLoaded = false;
  }

  ///////////////////////////////////////////////////////////////////////////

  function loadFile($lpszFileName, $iIndex)
  {
    if($iIndex < 0) {
      return false;
    }

    // READ FILE
    if(!($fh = @fOpen($lpszFileName, 'rb'))) {
    //	return false;
    }
//for local Gif's
//		$this->m_lpData = @fRead($fh, @fileSize($lpszFileName));
//for remote Gif's
    while(!feof($fh)) {
      $this->m_lpData = $this->m_lpData . fread($fh, 1024);
                        //$this->m_lpData = @fRead($fh, @fileSize($lpszFileName));
    }
    fClose($fh);
    // GET FILE HEADER
    if(!$this->m_gfh->load($this->m_lpData, $len = 0)) {
      return false;
    }
    $this->m_lpData = substr($this->m_lpData, $len);

    do {
      if(!$this->m_img->load($this->m_lpData, $imgLen = 0)) {
        return false;
      }
      $this->m_lpData = substr($this->m_lpData, $imgLen);
    }
    while($iIndex-- > 0);

    $this->m_bLoaded = true;

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function getSize($lpszFileName, &$width, &$height)
  {
    if(!($fh = @fOpen($lpszFileName, 'rb'))) {
      return false;
    }
    $data = @fRead($fh, @fileSize($lpszFileName));
    @fClose($fh);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}

    $gfh = new CGIFFILEHEADER();
    if(!$gfh->load($data, $len = 0)) {
      return false;
    }

    $width  = $gfh->m_nWidth;
    $height = $gfh->m_nHeight;

    return true;
  }

  ///////////////////////////////////////////////////////////////////////////

  function getBmp($bgColor)
  {
    $out = '';

    if(!$this->m_bLoaded) {
      return false;
    }

    // PREPARE COLOR TABLE (RGBQUADs)
    if($this->m_img->m_gih->m_bLocalClr) {
      $nColors = $this->m_img->m_gih->m_nTableSize;
      $rgbq    = $this->m_img->m_gih->m_colorTable->toRGBQuad();
      if($bgColor != -1) {
        $bgColor = $this->m_img->m_gih->m_colorTable->colorIndex($bgColor);
      }
    }
    else if($this->m_gfh->m_bGlobalClr) {
      $nColors = $this->m_gfh->m_nTableSize;
      $rgbq    = $this->m_gfh->m_colorTable->toRGBQuad();
      if($bgColor != -1) {
        $bgColor = $this->m_gfh->m_colorTable->colorIndex($bgColor);
      }
    }
    else {
      $nColors =  0;
      $bgColor = -1;
    }

    // PREPARE BITMAP BITS
    $data = $this->m_img->m_data;
    $nPxl = ($this->m_gfh->m_nHeight - 1) * $this->m_gfh->m_nWidth;
    $bmp  = '';
    $nPad = ($this->m_gfh->m_nWidth % 4) ? 4 - ($this->m_gfh->m_nWidth % 4) : 0;
    for($y = 0; $y < $this->m_gfh->m_nHeight; $y++) {
      for($x = 0; $x < $this->m_gfh->m_nWidth; $x++, $nPxl++) {
        if(
          ($x >= $this->m_img->m_gih->m_nLeft) &&
          ($y >= $this->m_img->m_gih->m_nTop) &&
          ($x <  ($this->m_img->m_gih->m_nLeft + $this->m_img->m_gih->m_nWidth)) &&
          ($y <  ($this->m_img->m_gih->m_nTop  + $this->m_img->m_gih->m_nHeight))) {
          // PART OF IMAGE
          if($this->m_img->m_bTrans && (ord($data{$nPxl}) == $this->m_img->m_nTrans)) {
            // TRANSPARENT -> BACKGROUND
            if($bgColor == -1) {
              $bmp .= chr($this->m_gfh->m_nBgColor);
            }
            else {
              $bmp .= chr($bgColor);
            }
          }
          else {
            $bmp .= $data{$nPxl};
          }
        }
        else {
          // BACKGROUND
          if($bgColor == -1) {
            $bmp .= chr($this->m_gfh->m_nBgColor);
          }
          else {
            $bmp .= chr($bgColor);
          }
        }
      }
      $nPxl -= $this->m_gfh->m_nWidth << 1;

      // ADD PADDING
      for($x = 0; $x < $nPad; $x++) {
        $bmp .= "\x00";
      }
    }

    // BITMAPFILEHEADER
    $out .= 'BM';
    $out .= $this->dword(14 + 40 + ($nColors << 2) + strlen($bmp));
    $out .= "\x00\x00";
    $out .= "\x00\x00";
    $out .= $this->dword(14 + 40 + ($nColors << 2));

    // BITMAPINFOHEADER
    $out .= $this->dword(40);
    $out .= $this->dword($this->m_gfh->m_nWidth);
    $out .= $this->dword($this->m_gfh->m_nHeight);
    $out .= "\x01\x00";
    $out .= "\x08\x00";
    $out .= "\x00\x00\x00\x00";
    $out .= "\x00\x00\x00\x00";
    $out .= "\x12\x0B\x00\x00";
    $out .= "\x12\x0B\x00\x00";
    $out .= $this->dword($nColors % 256);
    $out .= "\x00\x00\x00\x00";

    // COLOR TABLE
    if($nColors > 0) {
      $out .= $rgbq;
    }

    // DATA
    $out .= $bmp;

    return $out;
  }

  ///////////////////////////////////////////////////////////////////////////

  function getPng($bgColor)
  {
    $out = '';

    if(!$this->m_bLoaded) {
      return false;
    }

    // PREPARE COLOR TABLE (RGBQUADs)
    if($this->m_img->m_gih->m_bLocalClr) {
      $nColors = $this->m_img->m_gih->m_nTableSize;
      $pal     = $this->m_img->m_gih->m_colorTable->toString();
      if($bgColor != -1) {
        $bgColor = $this->m_img->m_gih->m_colorTable->colorIndex($bgColor);
      }
    }
    else if($this->m_gfh->m_bGlobalClr) {
      $nColors = $this->m_gfh->m_nTableSize;
      $pal     = $this->m_gfh->m_colorTable->toString();
      if($bgColor != -1) {
        $bgColor = $this->m_gfh->m_colorTable->colorIndex($bgColor);
      }
    }
    else {
      $nColors =  0;
      $bgColor = -1;
    }

    // PREPARE BITMAP BITS
    $data = $this->m_img->m_data;
    $nPxl = 0;
    $bmp  = '';
    for($y = 0; $y < $this->m_gfh->m_nHeight; $y++) {
      $bmp .= "\x00";
      for($x = 0; $x < $this->m_gfh->m_nWidth; $x++, $nPxl++) {
        if(
          ($x >= $this->m_img->m_gih->m_nLeft) &&
          ($y >= $this->m_img->m_gih->m_nTop) &&
          ($x <  ($this->m_img->m_gih->m_nLeft + $this->m_img->m_gih->m_nWidth)) &&
          ($y <  ($this->m_img->m_gih->m_nTop  + $this->m_img->m_gih->m_nHeight))) {
          // PART OF IMAGE
          $bmp .= $data{$nPxl};
        }
        else {
          // BACKGROUND
          if($bgColor == -1) {
            $bmp .= chr($this->m_gfh->m_nBgColor);
          }
          else {
            $bmp .= chr($bgColor);
          }
        }
      }
    }
    $bmp = gzcompress($bmp, 9);

    ///////////////////////////////////////////////////////////////////////
    // SIGNATURE
    $out .= "\x89\x50\x4E\x47\x0D\x0A\x1A\x0A";
    ///////////////////////////////////////////////////////////////////////
    // HEADER
    $out .= "\x00\x00\x00\x0D";
    $tmp  = 'IHDR';
    $tmp .= $this->ndword($this->m_gfh->m_nWidth);
    $tmp .= $this->ndword($this->m_gfh->m_nHeight);
    $tmp .= "\x08\x03\x00\x00\x00";
    $out .= $tmp;
    $out .= $this->ndword(crc32($tmp));
    ///////////////////////////////////////////////////////////////////////
    // PALETTE
    if($nColors > 0) {
      $out .= $this->ndword($nColors * 3);
      $tmp  = 'PLTE';
      $tmp .= $pal;
      $out .= $tmp;
      $out .= $this->ndword(crc32($tmp));
    }
    ///////////////////////////////////////////////////////////////////////
    // TRANSPARENCY
    if($this->m_img->m_bTrans && ($nColors > 0)) {
      $out .= $this->ndword($nColors);
      $tmp  = 'tRNS';
      for($i = 0; $i < $nColors; $i++) {
        $tmp .= ($i == $this->m_img->m_nTrans) ? "\x00" : "\xFF";
      }
      $out .= $tmp;
      $out .= $this->ndword(crc32($tmp));
    }
    ///////////////////////////////////////////////////////////////////////
    // DATA BITS
    $out .= $this->ndword(strlen($bmp));
    $tmp  = 'IDAT';
    $tmp .= $bmp;
    $out .= $tmp;
    $out .= $this->ndword(crc32($tmp));
    ///////////////////////////////////////////////////////////////////////
    // END OF FILE
    $out .= "\x00\x00\x00\x00IEND\xAE\x42\x60\x82";

    return $out;
  }

  ///////////////////////////////////////////////////////////////////////////

  function dword($val)
  {
    $val = intval($val);

    return chr($val & 0xFF).chr(($val & 0xFF00) >> 8).chr(($val & 0xFF0000) >> 16).chr(($val & 0xFF000000) >> 24);
  }

  ///////////////////////////////////////////////////////////////////////////

  function ndword($val)
  {
    $val = intval($val);

    return chr(($val & 0xFF000000) >> 24).chr(($val & 0xFF0000) >> 16).chr(($val & 0xFF00) >> 8).chr($val & 0xFF);
  }

  ///////////////////////////////////////////////////////////////////////////

  function width()
  {
    return $this->m_gfh->m_nWidth;
  }

  ///////////////////////////////////////////////////////////////////////////

  function height()
  {
    return $this->m_gfh->m_nHeight;
  }

  ///////////////////////////////////////////////////////////////////////////

  function comment()
  {
    return $this->m_img->m_lpComm;
  }

  ///////////////////////////////////////////////////////////////////////////

  function loaded()
  {
    return $this->m_bLoaded;
  }
}

///////////////////////////////////////////////////////////////////////////////////////////////////



XoopsModules25x / mylinks

Issues (661)

Security Analysis not enabled

fpdf/gif.php (9 issues)

Labels

Severity

Introduced By

Upgrade to new PHP Analysis Engine

Duplication Side-by-Side

Filter issues like