Файл: ips_kernel/classCaptchaPlugin/default.php
Строк: 458
<?php
/**
* @file default.php Plugin for the default CAPTCHA GD image
*~TERABYTE_DOC_READY~
* $Copyright: (c) 2001 - 2011 Invision Power Services, Inc.$
* $License: http://www.invisionpower.com/company/standards.php#license$
* $Author: bfarber $
* @since Friday 19th May 2006 17:33
* $LastChangedDate: 2012-02-10 20:05:52 -0500 (Fri, 10 Feb 2012) $
* @version v3.3.3
* $Revision: 10288 $
*/
/**
*
* @class captchaPlugin
* @brief Plugin for the default CAPTCHA GD image
* @note This plugin is automatically loaded by classCaptcha class based on the CAPTCHA setting
*
*/
class captchaPlugin
{
/**#@+
* Registry Object Shortcuts
*
* @var object
*/
public $registry;
public $DB;
public $settings;
public $member;
/**#@-*/
/**
* String that stores the backgrounds path
*
* @var string
*/
public $path_background = '';
/**
* String that stores the fonts path
*
* @var string
*/
public $path_fonts = '';
/**
* String that stores the captcha key
*
* @var string
*/
public $captchaKey = '';
/**
* Constructor
*
* @param object $registry Registry Object
* @return @e void
*/
public function __construct( ipsRegistry $registry )
{
$this->registry = $registry;
$this->DB = $this->registry->DB();
$this->settings =& $this->registry->fetchSettings();
$this->member = $this->registry->member();
/* Settings */
$this->path_background = DOC_IPS_ROOT_PATH . PUBLIC_DIRECTORY . '/style_captcha/captcha_backgrounds';
$this->path_fonts = DOC_IPS_ROOT_PATH . PUBLIC_DIRECTORY . '/style_captcha/captcha_fonts';
}
/**
* Returns the captcha template
*
* @return @e string
*
* <b>Example Usage:</b>
* @code
* $gdImage = $this->getTemplate();
* @endcode
*/
public function getTemplate()
{
//-----------------------------------------
// Clear old
//-----------------------------------------
$this->_clearSessions( $this->member->ip_address );
//-----------------------------------------
// Create new ID
//-----------------------------------------
$captcha_unique_id = md5( uniqid( time() ) );
$captcha_string = "";
//-----------------------------------------
// Create new string
//-----------------------------------------
/**
* Array of characters
* Removed: 0, o, O, 1, l, I, i, L (because they're hard to differentiate)
*/
$array_of_chars = array(
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm', 'n', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'2', '3', '4', '5', '6', '7', '8', '9',
);
/* Get 6 random characters */
for( $i = 0; $i < 6; $i++ )
{
$idx = mt_rand( 0, count( $array_of_chars ) - 1 );
$captcha_string .= $array_of_chars[ $idx ];
}
//-----------------------------------------
// Add to the DB
//-----------------------------------------
$this->DB->insert( 'captcha', array( 'captcha_unique_id' => $captcha_unique_id,
'captcha_string' => $captcha_string,
'captcha_ipaddress' => $this->member->ip_address,
'captcha_date' => time() ) );
/* Make available */
$this->captchaKey = $captcha_unique_id;
/* Return template */
return $this->registry->output->getTemplate('global_other')->captchaGD( $captcha_unique_id );
}
/**
* Validates the entered captcha code, returning true on success and false on failure
*
* @return @e boolean
*
* <b>Example Usage:</b>
* @code
* $isValid = $this->validate();
* @endcode
*/
public function validate()
{
/* Init vars */
$captcha_unique_id = IPSText::alphanumericalClean( $_REQUEST['captcha_unique_id'] );
$captcha_input_NOT_CLEAN = trim( $_REQUEST['captcha_string'] );
/* Get ID from DB */
$captcha = $this->DB->buildAndFetch( array( 'select' => '*', 'from' => 'captcha', 'where' => "captcha_unique_id='". addslashes( $captcha_unique_id )."'" ) );
if ( ! $captcha['captcha_unique_id'] )
{
return FALSE;
}
/* Check */
if ( $captcha['captcha_string'] != $captcha_input_NOT_CLEAN )
{
return FALSE;
}
else
{
$this->_clearSessions( $this->member->ip_address );
return TRUE;
}
}
/**
* Generates the captcha image. Returns false on failure.
*
* @param array $captcha_unique_id Key 0 of the array contains the Unique ID
* @return @e mixed
*
* <b>Example Usage:</b>
* @code
* $captchaImage = $this->showImage( $captcha_unique_id );
* @endcode
*/
public function showImage( $captcha_unique_id )
{
//-----------------------------------------
// Magic _call method makes an array
//-----------------------------------------
$captcha_unique_id = $captcha_unique_id[0];
if ( ! $captcha_unique_id )
{
return false;
}
/* Get the info from the DB */
$captcha = $this->DB->buildAndFetch( array( 'select' => '*', 'from' => 'captcha', 'where' => "captcha_unique_id='" . $captcha_unique_id . "'" ) );
if ( ! $captcha['captcha_unique_id'] )
{
return false;
}
/* Show it... */
$this->_showGDImage( $captcha['captcha_string'] );
}
/**
* Prints captcha image and headers
*
* @param string $content Key to show in the GD image
* @return @e void
*
* <b>Example Usage:</b>
* @code
* $this->_showGDImage( $captcha_string );
* @endcode
*/
protected function _showGDImage( $content="" )
{
//-----------------------------------------
// Is GD Available?
//-----------------------------------------
if ( ! extension_loaded('gd') )
{
@header( "Content-Type: image/gif" );
print base64_decode( "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" );
exit();
}
//-----------------------------------------
// INIT
//-----------------------------------------
$content = ' '. preg_replace( "/(w)/", "\1 ", $content ) .' ';
$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->_getBackgrounds();
$fonts = $this->_getFonts();
//-----------------------------------------
// Got a background?
//-----------------------------------------
$_imgs = array();
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
{
$_imgs[] = $im;
if( count( $_imgs ) > 2 )
{
$continue_loop = FALSE;
$_started = TRUE;
}
}
break;
case 'gif':
if ( ! function_exists('imagecreatefromgif') OR ! $im = @imagecreatefromgif($background) )
{
unset( $backgrounds[ $i ] );
}
else
{
$_imgs[] = $im;
if( count( $_imgs ) > 2 )
{
$continue_loop = FALSE;
$_started = TRUE;
}
}
break;
case 'png':
if ( ! function_exists('imagecreatefrompng') OR ! $im = @imagecreatefrompng($background) )
{
unset( $backgrounds[ $i ] );
}
else
{
$_imgs[] = $im;
if( count( $_imgs ) > 2 )
{
$continue_loop = FALSE;
$_started = TRUE;
}
}
break;
}
}
else
{
$continue_loop = FALSE;
}
}
/* Create a new background */
if( count( $_imgs > 2 ) )
{
/* Setup */
$strip_count = 8;
$strips = ceil( $image_x / $strip_count );
$im = imagecreatetruecolor( $image_x, $image_y );
$curr_offset = 0;
$alternate = 0;
for( $i = 0; $i < $strip_count; $i++ )
{
/* Alternate the background */
$alternate++;
$alternate = ( $alternate > 2 ) ? 0 : $alternate;
/* Width of the strip */
$end_strip = ( $i * $strips ) + mt_rand( 1, $strips );
/* Copy the splice */
imagecopymerge( $im, $_imgs[$alternate], $curr_offset, 0, $curr_offset, 0, $end_strip, $image_y, mt_rand( 1, 100 ) );
/* Increment the offset */
$curr_offset += $end_strip;
}
$_started = TRUE;
}
//-----------------------------------------
// Still not got one? DO OLD FASHIONED
//-----------------------------------------
if ( $_started !== TRUE )
{
$im = imagecreatetruecolor($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 => mt_rand(0, $tmp_x - 10),
1 => mt_rand(0, $tmp_y - 3),
2 => mt_rand(0, $tmp_x - 10),
3 => mt_rand(0, $tmp_y - 3),
4 => mt_rand(0, $tmp_x - 10),
5 => mt_rand(0, $tmp_y - 3),
6 => mt_rand(0, $tmp_x - 10),
7 => mt_rand(0, $tmp_y - 3),
8 => mt_rand(0, $tmp_x - 10),
9 => mt_rand(0, $tmp_y - 3),
10 => mt_rand(0, $tmp_x - 10),
11 => mt_rand(0, $tmp_y - 3),
);
$randomcolor = imagecolorallocate( $tmp, mt_rand(100,255), mt_rand(100,255), mt_rand(100,255) );
imagefilledpolygon($tmp, $values, 6, $randomcolor );
}
$num = strlen($content);
$x_param = 0;
$y_param = 0;
for( $i = 0; $i < $num; $i++ )
{
$x_param += mt_rand(-1,12);
$y_param = mt_rand(-3,8);
if( $x_param + 18 > $image_x )
{
$x_param -= ceil( $x_param + 18 - $image_x );
}
$randomcolor = imagecolorallocate( $tmp, mt_rand(0,150), mt_rand(0,150), mt_rand(0,150) );
imagestring($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( $im, mt_rand(0,150), mt_rand(0,150), mt_rand(0,150) );
ImageSetPixel($im, mt_rand(0, $image_x), mt_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 ( function_exists('imagettftext') AND is_array( $fonts ) AND count( $fonts ) )
{
if ( function_exists('imageantialias') )
{
imageantialias( $im, TRUE );
}
$num = strlen($content);
$x_param = -10;
$y_param = 0;
for( $i = 0; $i < $num; $i++ )
{
/* Random Font */
$_font = $fonts[ mt_rand( 0, count( $fonts ) - 1 ) ];
$y_param = mt_rand( 35, 48 );
# Main color
$col_r = mt_rand(50,200);
$col_g = mt_rand(0,150);
$col_b = mt_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( -320, -280 );
imagearc( $im, $a , $b , $c, $d, 0, $e, $color_light );
imagearc( $im, $a+1, $b+1, $c, $d, 0, $e, $color_main );
}
}
$text_size = mt_rand( 24, 30 ); //24
if ( ! $_result = @imagettftext( $im, $text_size, $_slant, $x_param - 1, $y_param - 1, $color_light, $_font, $content[$i] ) )
{
$use_fonts = FALSE;
break;
}
else
{
@imagettftext( $im, $text_size, $_slant, $x_param + 1, $y_param + 1, $color_dark, $_font, $content[$i] );
@imagettftext( $im, $text_size, $_slant, $x_param, $y_param, $color_main, $_font, $content[$i] );
}
$x_param += mt_rand( 13, 16 ); //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 += mt_rand( 6, 12 );
if( $x_param + 18 > $image_x )
{
$x_param -= ceil( $x_param + 18 - $image_x );
}
}
$y_param = mt_rand( 0, 5 );
$randomcolor = imagecolorallocate( $tmp, mt_rand(50,200), mt_rand(50,200), mt_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->_showGDImageWave( $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
*
* @param resources $im Image resource
* @param integer $wave Wave factor
* @return @e resource
*
* <b>Example Usage:</b>
* @code
* $imageResource = $this->_showGDImageWave( $captcha_string );
* @endcode
*/
protected function _showGDImageWave( $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 or 'dead' entries
*
* @param string $ip_address Optional IP address to clear out on
* @return @e void
*
* <b>Example Usage:</b>
* @code
* $this->_clearSessions( $ip_address );
* @endcode
*/
protected function _clearSessions( $ip_address='' )
{
/* Init vars */
$time = time() - 60 * 3600;
$extra = ( $ip_address ) ? " OR captcha_ipaddress='" . $ip_address . "'" : '';
/* Remove from DB */
$this->DB->delete( 'captcha', 'captcha_date < ' . $time . $extra );
}
/**
* Retrieves the list of backgrounds from the specified path
*
* @return @e array
*
* <b>Example Usage:</b>
* @code
* $images = $this->_getBackgrounds();
* @endcode
*/
protected function _getBackgrounds()
{
/* Init vars */
$images = array();
$_path = $this->path_background;
/* Loop */
if ( $_dir = opendir( $_path ) )
{
while( false !== ( $_file = readdir( $_dir ) ) )
{
if ( preg_match( "#.(gif|jpeg|jpg|png)$#i", $_file ) )
{
$images[] = $_path . '/' . $_file;
}
}
}
return $images;
}
/**
* Retrieves the list of fonts from the specified path
*
* @return @e array
*
* <b>Example Usage:</b>
* @code
* $fonts = $this->_getFonts();
* @endcode
*/
protected function _getFonts()
{
/* Init vars */
$fonts = array();
$_path = $this->path_fonts;
/* Loop */
if ( $_dir = @opendir( $_path ) )
{
while( false !== ( $_file = @readdir( $_dir ) ) )
{
if ( preg_match( "#.(ttf)$#i", $_file ) )
{
$fonts[] = $_path . '/' . $_file;
}
}
}
return $fonts;
}
}