Your IP : 172.28.240.42
<?php
/*
+---------------------------------------------------------------------------
| Invision Power Dynamic v1.0.0
| ========================================
| by Matthew Mecham
| (c) 2004 Invision Power Services
| Nullified by Terabyte
| ========================================
+---------------------------------------------------------------------------
| INVISION POWER DYNAMIC IS NOT FREE SOFTWARE!
|
+---------------------------------------------------------------------------
| > $Id$
| > $Revision: 128 $
| > $Date: 2006-01-20 12:46:26 +0000 (Fri, 20 Jan 2006) $
+---------------------------------------------------------------------------
|
| > CAPTCHA ANTI-SPAM CLASS
| > Script written by Matt Mecham
| > Date started: Thursday 2 February (11:08)
|
+---------------------------------------------------------------------------
*/
/**
* CAPTCHA CLASS
* ipsclass dependent method of showing an anti-spam image
*
* This creates a unique MD5 hash and stores it in the DB with
* an 8 character string of 0-9a-z
*
* <code>
* CREATE TABLE captcha (
* captcha_unique_id VARCHAR(32) NOT NULL default '',
* captcha_string VARCHAR(100) NOT NULL default '',
* captcha_ipaddress VARCHAR(16) NOT NULL default '',
* captcha_date INT(10) NOT NULL default '',
* PRIMARY KEY (captcha_unique_id )
* );
* </code>
* @package IPDYNAMIC
* @author Matt Mecham
* @copyright Invision Power Services, Inc.
* @version 1.0
*/
class class_captcha
{
/**
* Global IPS class array
* @var object
*/
var $ipsclass;
/**
* GD version
* @var integer
*/
var $gd_version = 0;
/**
* Backgrounds path
* @var string
*/
var $path_background = '';
/**
* Fonts path
* @var string
*/
var $path_fonts = '';
/*-------------------------------------------------------------------------*/
// Initializes captcha session
/*-------------------------------------------------------------------------*/
/**
* Initializes captcha session
* Clears out "dead" entries, adds new row and returns
* unique ID for use in an image
*
* @return string Captcha unique ID
*/
function captcha_create_session()
{
//-----------------------------------------
// Clear old
//-----------------------------------------
$this->captcha_clear_sessions( $this->ipsclass->ip_address );
//-----------------------------------------
// Create new ID
//-----------------------------------------
$captcha_unique_id = md5( uniqid( time() ) );
$captcha_string = "";
//-----------------------------------------
// Create new string
//-----------------------------------------
mt_srand( (double) microtime() * 1000000 );
$final_rand = md5( uniqid( mt_rand(), TRUE ) );
mt_srand();
for( $i = 0; $i < 6; $i++ )
{
$captcha_string .= $final_rand{ mt_rand(0, 31) };
}
//-----------------------------------------
// Add to the DB
//-----------------------------------------
$this->ipsclass->DB->do_insert( 'captcha', array( 'captcha_unique_id' => $captcha_unique_id,
'captcha_string' => $captcha_string,
'captcha_ipaddress' => $this->ipsclass->ip_address,
'captcha_date' => time() ) );
//-----------------------------------------
// Return ID
//-----------------------------------------
return $captcha_unique_id;
}
/*-------------------------------------------------------------------------*/
// Captcha validate
/*-------------------------------------------------------------------------*/
/**
* Show the captcha bot image
*
* @param string captcha_unique_id The captcha DB row
* @param string captcha_input The user entered data
* @return void
* @since 1.0
*/
function captcha_validate( $captcha_unique_id, $captcha_input )
{
//-----------------------------------------
// INIT
//-----------------------------------------
$captcha_input = trim( strtolower($captcha_input) );
//-----------------------------------------
// Get the info from the DB
//-----------------------------------------
$captcha = $this->ipsclass->DB->build_and_exec_query( array( 'select' => '*',
'from' => 'captcha',
'where' => "captcha_unique_id='".$captcha_unique_id."'" ) );
if ( ! $captcha['captcha_unique_id'] )
{
return FALSE;
}
//-----------------------------------------
// Check...
//-----------------------------------------
if ( $captcha['captcha_string'] != $captcha_input )
{
return FALSE;
}
else
{
return TRUE;
}
}
/*-------------------------------------------------------------------------*/
// Captcha show image
/*-------------------------------------------------------------------------*/
/**
* Show the captcha bot image
*
* @param string captcha_unique_id
* @return void
* @since 1.0
*/
function captcha_show_image( $captcha_unique_id )
{
//-----------------------------------------
// CHECK
//-----------------------------------------
if ( ! $captcha_unique_id )
{
return FALSE;
}
//-----------------------------------------
// Get the info from the DB
//-----------------------------------------
$captcha = $this->ipsclass->DB->build_and_exec_query( array( 'select' => '*',
'from' => 'captcha',
'where' => "captcha_unique_id='".$captcha_unique_id."'" ) );
if ( ! $captcha['captcha_unique_id'] )
{
return FALSE;
}
//-----------------------------------------
// Show it...
//-----------------------------------------
$this->captcha_show_gd_img( $captcha['captcha_string'] );
}
/*-------------------------------------------------------------------------*/
// Show GD created security image...
/*-------------------------------------------------------------------------*/
/**
* Show anti-spam bot GD image numbers
*
* @param string Number string
* @return void
* @since 1.0
*/
function captcha_show_gd_img( $content="" )
{
//-----------------------------------------
// Is GD Available?
//-----------------------------------------
if( !extension_loaded('gd') )
{
exit();
}
//-----------------------------------------
// INIT
//-----------------------------------------
$content = ' '. preg_replace( "/(\w)/", "\\1 ", $content ) .' ';
$allow_fonts = isset( $this->ipsclass->vars['captcha_allow_fonts'] ) ? $this->ipsclass->vars['captcha_allow_fonts'] : 1;
$use_fonts = 0;
$tmp_x = 135;
$tmp_y = 20;
$image_x = 200;
$image_y = 60;
$circles = 3;
$continue_loop = TRUE;
$_started = FALSE;
//-----------------------------------------
// Get backgrounds and fonts...
//-----------------------------------------
$backgrounds = $this->_captcha_show_gd_img_get_backgrounds();
$fonts = $this->_captcha_show_gd_img_get_fonts();
//-----------------------------------------
// Seed rand functions for PHP versions that don't
//-----------------------------------------
mt_srand( (double) microtime() * 1000000 );
//-----------------------------------------
// Got a background?
//-----------------------------------------
if ( $this->ipsclass->vars['gd_version'] > 1 )
{
while ( $continue_loop )
{
if ( is_array( $backgrounds ) AND count( $backgrounds ) )
{
$i = mt_rand(0, count( $backgrounds ) - 1 );
$background = $backgrounds[ $i ];
$_file_extension = preg_replace( "#^.*\.(\w{2,4})$#is", "\\1", strtolower( $background ) );
switch( $_file_extension )
{
case 'jpg':
case 'jpe':
case 'jpeg':
if ( ! function_exists('imagecreatefromjpeg') OR ! $im = @imagecreatefromjpeg($background) )
{
unset( $backgrounds[ $i ] );
}
else
{
$continue_loop = FALSE;
$_started = TRUE;
}
break;
case 'gif':
if ( ! function_exists('imagecreatefromgif') OR ! $im = @imagecreatefromgif($background) )
{
unset( $backgrounds[ $i ] );
}
else
{
$continue_loop = FALSE;
$_started = TRUE;
}
break;
case 'png':
if ( ! function_exists('imagecreatefrompng') OR ! $im = @imagecreatefrompng($background) )
{
unset( $backgrounds[ $i ] );
}
else
{
$continue_loop = FALSE;
$_started = TRUE;
}
break;
}
}
else
{
$continue_loop = FALSE;
}
}
}
//-----------------------------------------
// Still not got one? DO OLD FASHIONED
//-----------------------------------------
if ( $_started !== TRUE )
{
if ( $this->ipsclass->vars['gd_version'] == 1 )
{
$im = imagecreate($image_x, $image_y);
$tmp = imagecreate($tmp_x, $tmp_y);
}
else
{
$im = imagecreatetruecolor($image_x, $image_y);
$tmp = imagecreatetruecolor($tmp_x, $tmp_y);
}
$white = ImageColorAllocate($tmp, 255, 255, 255);
$black = ImageColorAllocate($tmp, 0, 0, 0);
$grey = ImageColorAllocate($tmp, 200, 200, 200 );
imagefill($tmp, 0, 0, $white);
for ( $i = 1; $i <= $circles; $i++ )
{
$values = array(
0 => rand(0, $tmp_x - 10),
1 => rand(0, $tmp_y - 3),
2 => rand(0, $tmp_x - 10),
3 => rand(0, $tmp_y - 3),
4 => rand(0, $tmp_x - 10),
5 => rand(0, $tmp_y - 3),
6 => rand(0, $tmp_x - 10),
7 => rand(0, $tmp_y - 3),
8 => rand(0, $tmp_x - 10),
9 => rand(0, $tmp_y - 3),
10 => rand(0, $tmp_x - 10),
11 => rand(0, $tmp_y - 3),
);
$randomcolor = imagecolorallocate( $tmp, rand(100,255), rand(100,255),rand(100,255) );
imagefilledpolygon($tmp, $values, 6, $randomcolor );
}
$num = strlen($content);
$x_param = 0;
$y_param = 0;
for( $i = 0; $i < $num; $i++ )
{
$x_param += rand(-1,12);
$y_param = rand(-3,8);
if( $x_param + 18 > $image_x )
{
$x_param -= ceil( $x_param + 18 - $image_x );
}
$randomcolor = imagecolorallocate( $tmp, rand(0,150), rand(0,150),rand(0,150) );
imagestring($tmp, 5, $x_param+1, $y_param+1, $content{$i}, $grey);
imagestring($tmp, 5, $x_param, $y_param, $content{$i}, $randomcolor);
}
//-----------------------------------------
// Distort by resizing
//-----------------------------------------
imagecopyresized($im, $tmp, 0, 0, 0, 0, $image_x, $image_y, $tmp_x, $tmp_y);
imagedestroy($tmp);
//-----------------------------------------
// Background dots and lines
//-----------------------------------------
$random_pixels = $image_x * $image_y / 10;
for ($i = 0; $i < $random_pixels; $i++)
{
$randomcolor = imagecolorallocate( $im, rand(0,150), rand(0,150),rand(0,150) );
ImageSetPixel($im, rand(0, $image_x), rand(0, $image_y), $randomcolor);
}
$no_x_lines = ($image_x - 1) / 5;
for ( $i = 0; $i <= $no_x_lines; $i++ )
{
ImageLine( $im, $i * $no_x_lines, 0, $i * $no_x_lines, $image_y, $grey );
ImageLine( $im, $i * $no_x_lines, 0, ($i * $no_x_lines)+$no_x_lines, $image_y, $grey );
}
$no_y_lines = ($image_y - 1) / 5;
for ( $i = 0; $i <= $no_y_lines; $i++ )
{
ImageLine( $im, 0, $i * $no_y_lines, $image_x, $i * $no_y_lines, $grey );
}
}
else
{
//-----------------------------------------
// Can we use fonts?
//-----------------------------------------
if ( $allow_fonts AND function_exists('imagettftext') AND is_array( $fonts ) AND count( $fonts ) )
{
if ( function_exists('imageantialias') )
{
imageantialias( $im, TRUE );
}
$num = strlen($content);
$x_param = -18;
$y_param = 0;
$_font = $fonts[ mt_rand( 0, count( $fonts ) - 1 ) ];
for( $i = 0; $i < $num; $i++ )
{
$y_param = rand( 35, 48 );
# Main color
$col_r = rand(50,200);
$col_g = rand(0,150);
$col_b = rand(50,200);
# High light
$col_r_l = ( $col_r + 50 > 255 ) ? 255 : $col_r + 50;
$col_g_l = ( $col_g + 50 > 255 ) ? 255 : $col_g + 50;
$col_b_l = ( $col_b + 50 > 255 ) ? 255 : $col_b + 50;
# Low light
$col_r_d = ( $col_r - 50 < 0 ) ? 0 : $col_r - 50;
$col_g_d = ( $col_g - 50 < 0 ) ? 0 : $col_g - 50;
$col_b_d = ( $col_b - 50 < 0 ) ? 0 : $col_b - 50;
$color_main = imagecolorallocate( $im, $col_r, $col_g, $col_b );
$color_light = imagecolorallocate( $im, $col_r_l, $col_g_l, $col_b_l );
$color_dark = imagecolorallocate( $im, $col_r_d, $col_g_d, $col_b_d );
$_slant = mt_rand( -20, 40 );
if ( $i == 1 OR $i == 3 OR $i == 5 )
{
for( $ii = 0 ; $ii < 2 ; $ii++ )
{
$a = $x_param + 50;
$b = mt_rand(0,100);
$c = $a + 20;
$d = $b + 20;
$e = ( $i == 3 ) ? mt_rand( 280, 320 ) : mt_rand( -280, -320 );
imagearc( $im, $a , $b , $c, $d, 0, $e, $color_light );
imagearc( $im, $a+1, $b+1, $c, $d, 0, $e, $color_main );
}
}
if ( ! $_result = @imagettftext( $im, 24, $_slant, $x_param - 1, $y_param - 1, $color_light, $_font, $content{$i} ) )
{
$use_fonts = FALSE;
break;
}
else
{
@imagettftext( $im, 24, $_slant, $x_param + 1, $y_param + 1, $color_dark, $_font, $content{$i} );
@imagettftext( $im, 24, $_slant, $x_param, $y_param, $color_main, $_font, $content{$i} );
}
$x_param += rand( 15, 18 );
if( $x_param + 18 > $image_x )
{
$x_param -= ceil( $x_param + 18 - $image_x );
}
}
$use_fonts = TRUE;
}
if ( ! $use_fonts )
{
//-----------------------------------------
// Continue with nice background image
//-----------------------------------------
$tmp = imagecreatetruecolor($tmp_x , $tmp_y );
$tmp2 = imagecreatetruecolor($image_x, $image_y);
$white = imagecolorallocate( $tmp, 255, 255, 255 );
$black = imagecolorallocate( $tmp, 0, 0, 0 );
$grey = imagecolorallocate( $tmp, 100, 100, 100 );
$transparent = imagecolorallocate( $tmp2, 255, 255, 255 );
$_white = imagecolorallocate( $tmp2, 255, 255, 255 );
imagefill($tmp , 0, 0, $white );
imagefill($tmp2, 0, 0, $_white);
$num = strlen($content);
$x_param = 0;
$y_param = 0;
for( $i = 0; $i < $num; $i++ )
{
if ( $i > 0 )
{
$x_param += rand( 6, 12 );
if( $x_param + 18 > $image_x )
{
$x_param -= ceil( $x_param + 18 - $image_x );
}
}
$y_param = rand( 0, 5 );
$randomcolor = imagecolorallocate( $tmp, rand(50,200), rand(50,200),rand(50,200) );
imagestring( $tmp, 5, $x_param + 1, $y_param + 1, $content{$i}, $grey );
imagestring( $tmp, 5, $x_param , $y_param , $content{$i}, $randomcolor );
}
imagecopyresized($tmp2, $tmp, 0, 0, 0, 0, $image_x, $image_y, $tmp_x, $tmp_y );
$tmp2 = $this->captcha_show_gd_img_wave( $tmp2, 8, true );
imagecolortransparent( $tmp2, $transparent );
imagecopymerge( $im, $tmp2, 0, 0, 0, 0, $image_x, $image_y, 100 );
imagedestroy($tmp);
imagedestroy($tmp2);
}
}
//-----------------------------------------
// Blur?
//-----------------------------------------
if ( function_exists( 'imagefilter' ) )
{
@imagefilter( $im, IMG_FILTER_GAUSSIAN_BLUR );
}
//-----------------------------------------
// Render a border
//-----------------------------------------
$black = imagecolorallocate( $im, 0, 0, 0 );
imageline( $im, 0, 0, $image_x, 0, $black );
imageline( $im, 0, 0, 0, $image_y, $black );
imageline( $im, $image_x - 1, 0, $image_x - 1, $image_y, $black );
imageline( $im, 0, $image_y - 1, $image_x, $image_y - 1, $black );
//-----------------------------------------
// Show it!
//-----------------------------------------
@header( "Content-Type: image/jpeg" );
imagejpeg( $im );
imagedestroy( $im );
exit();
}
/*-------------------------------------------------------------------------*/
// Create wave effect for GD images...
/*-------------------------------------------------------------------------*/
/**
* Create wave effect for GD images
*
* @param object Image resource
* @return object Returned image resource
* @since 1.0
*/
function captcha_show_gd_img_wave( $im, $wave=10 )
{
$_width = imagesx( $im );
$_height = imagesy( $im );
$tmp = imagecreatetruecolor( $_width, $_height );
$_direction = ( time() % 2 ) ? TRUE : FALSE;
for ( $x = 0; $x < $_width; $x++ )
{
for ( $y = 0 ; $y < $_height ; $y++ )
{
$xo = $wave * sin( 2 * 3.1415 * $y / 128 );
$yo = $wave * cos( 2 * 3.1415 * $x / 128 );
$_x = $x - $xo;
$_y = $y - $yo;
if ( ($_x > 0 AND $_x < $_width) AND ($_y > 0 AND $_y < $_height) )
{
$index = imagecolorat($im, $_x, $_y);
$colors = imagecolorsforindex($im, $index);
$color = imagecolorresolve( $tmp, $colors['red'], $colors['green'], $colors['blue'] );
}
else
{
$color = imagecolorresolve( $tmp, 255, 255, 255 );
}
imagesetpixel( $tmp, $x, $y, $color );
}
}
return $tmp;
}
/*-------------------------------------------------------------------------*/
// Removes extinct captcha sessions
/*-------------------------------------------------------------------------*/
/**
* Removes extinct captcha sessions
* Clears out "dead" entries
*
* @param string Optional IP address to clear out on
* @return string void
*/
function captcha_clear_sessions( $ip_address='' )
{
//-----------------------------------------
// INIT
//-----------------------------------------
$time = time() - 60 * 3600;
$extra = ( $ip_address ) ? ' OR captcha_ipaddress="'.$ip_address.'"' : '';
//-----------------------------------------
// Remove...
//-----------------------------------------
$this->ipsclass->DB->build_and_exec_query( array( 'delete' => 'captcha',
'where' => 'captcha_date < ' . $time . $extra ) );
}
/*-------------------------------------------------------------------------*/
// Load up the backgrounds
/*-------------------------------------------------------------------------*/
/**
* Loads up the backgrounds.
*
* @return array backgrounds
*/
function _captcha_show_gd_img_get_backgrounds()
{
//-----------------------------------------
// INIT
//-----------------------------------------
$images = array();
$_path = $this->path_background;
if ( $_dir = @opendir( $_path ) )
{
while( false !== ( $_file = @readdir( $_dir ) ) )
{
if ( preg_match( "#\.(gif|jpeg|jpg|png)$#i", $_file ) )
{
$images[] = $_path . '/' . $_file;
}
}
}
return $images;
}
/*-------------------------------------------------------------------------*/
// Load up the fonts
/*-------------------------------------------------------------------------*/
/**
* Loads up the fonts.
*
* @return array fonts
*/
function _captcha_show_gd_img_get_fonts()
{
//-----------------------------------------
// INIT
//-----------------------------------------
$fonts = array();
$_path = $this->path_fonts;
if ( $_dir = @opendir( $_path ) )
{
while( false !== ( $_file = @readdir( $_dir ) ) )
{
if ( preg_match( "#\.(ttf)$#i", $_file ) )
{
$fonts[] = $_path . '/' . $_file;
}
}
}
return $fonts;
}
}
?>