* 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 ) * ); * * PLUG IN: Default GD image * 
 * Invision Power Services
 * IP.Board v3.1.4
 * Last Updated: $Date: 2010-09-13 17:11:29 -0400 (Mon, 13 Sep 2010) $
 *
* * @package IP.Board * @subpackage Kernel * @author Matt Mecham * @copyright Invision Power Services, Inc. * @version 1.0 */ class captchaPlugin { /** * GD version * * @access public * @var integer */ public $gd_version = 0; /** * Backgrounds path * * @access public * @var string */ public $path_background = ''; /** * Fonts path * * @access public * @var string */ public $path_fonts = ''; /** * Return an error if GD is not installed? * My most verbose string name. I'm so proud. * * @access public * @var boolean */ public $show_error_gd_img = false; /** * Registry object * * @access protected * @var object */ public $registry; /** * Database object * * @access protected * @var object */ public $DB; /** * Settings object * * @access protected * @var object */ public $settings; /** * Request object * * @access protected * @var object */ public $request; /** * Language object * * @access protected * @var object */ public $lang; /** * Member object * * @access protected * @var object */ public $member; /** * Member data object * * @access protected * @var object */ public $memberData; /** * Captcha key * * @access public * @var string */ public $captchaKey = ''; /** * Constructor * * @param object Registry Object */ public function __construct( ipsRegistry $registry ) { $this->registry = $registry; $this->DB = $this->registry->DB(); $this->settings =& $this->registry->fetchSettings(); $this->request =& $this->registry->fetchRequest(); $this->lang = $this->registry->getClass('class_localization'); $this->member = $this->registry->member(); $this->memberData =& $this->registry->member()->fetchMemberData(); /* Settings */ $this->gd_version = $this->settings['gd_version']; $this->path_background = DOC_IPS_ROOT_PATH . 'public/style_captcha/captcha_backgrounds'; $this->path_fonts = DOC_IPS_ROOT_PATH . 'public/style_captcha/captcha_fonts'; } /** * Returns the template bit * * @access public * @return string */ 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 Bit //----------------------------------------- return $this->registry->output->getTemplate('global_other')->captchaGD( $captcha_unique_id ); } /** * Validate the captcha image * * @access public * @return boolean */ public function validate() { //----------------------------------------- // INIT //----------------------------------------- $captcha_unique_id = IPSText::alphanumericalClean( $_REQUEST['captcha_unique_id'] ); $captcha_input_NOT_CLEAN = trim( $_REQUEST['captcha_string'] ); //----------------------------------------- // Get the info from the 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; } } /** * Show the captcha bot image * * @access public * @param string captcha_unique_id Unique captcha db row id * @return mixed [Boolean on failure],[Output image data/headers] * @since 1.0 */ public function showImage( $captcha_unique_id ) { //----------------------------------------- // CHECK //----------------------------------------- //----------------------------------------- // 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'] ); } /** * Show anti-spam bot GD image numbers * * @param string Number string * @return void * @since 1.0 */ private function _showGDImage( $content="" ) { //----------------------------------------- // Is GD Available? //----------------------------------------- if ( ! extension_loaded('gd') ) { if ( $this->show_error_gd_img ) { @header( "Content-Type: image/gif" ); print base64_decode( "R0lGODlhyAA8AJEAAN/f3z8/P8zMzP///yH5BAAAAAAALAAAAADIADwAAAL/nI+py+0Po5y02ouz3rz7D4biSJbmiabqyrbuC8fyTNf2jef6zvf+DwwKh8Si8YhMlgACwEHQXESfzgOzykQAqgMmFMr9Rq+GbHlqAFsFWnFVrfwIAvQAu15P0A14Nn8/ADhXd4dnl2YYCAioGHBgyDbnNzBIV0gYxzEYWdg1iLAnScmFuQdAt2UKZTcl+mip+HoYG+tKOfv3N5l5garnmPt6CwyaFzrranu7i0crObvoaKvMyMhrIQhFuyzcyGwXcOpoLYg7DGsZXk5r6DSN51RNfF0RPU5sy7gpnH5bjLhrk7Y9/RQNisfq2CRJauTR6xUuFyBx/yrWypMMmTlq/9IwQnKWcKG5cvMeShBIMOFIaV9w2eti6SBABAyjvBRFMaZCMaxsqtxl8iShjpj+VfqGCJg4XzOfJCK5DVWliFNXlSIENKjWrVy7ev0KNqzYsWTFwhlFU8waLk+efGF7hi0aSgu3iGmV1cxdoGTinimbiGOeP8SWhps6z3AkeMMWW20mMykqQyuJDbYWdufKBJWc2uWmAJZdO0yOKfTCCqHGiO4E/oKGriTYaBw5g/MDqynNlW9Uhmx66tM2i05dNcM8O6Rg2MHLYKraLTpDcLebTke4APkcduAoku0DWpe24MI96ewZPdiy6Rlx/0Y+XJevlNu/z6vtlHFxZbpv9f9edYkfxgVmjnqSxXYOYPfFVMgXIHGC0ltWDNXYJ6Lsw82AFVpWEk4pEabgbsfBM5FphyDWRh1OLCUgbC06NtNU6UV1T1Jl3YhjjjruyGOPPv4IZJBC6tDXGUDB4UUaK06RhRl/0aWWF3CR4YWESraR1ZCh6dMOiMNIFE2GI/bRJYiIEeULiloyUNSFLzWC3VXcqEJXTBe1qApDpbXUEYxr2tYeQCyyGMuIcxbokHfPvPjHf25mqeWHoLEX0iH0UScmUzSWNxmj20yH6Z+/yNTeM0N1cumkg9E4GHnluLcfeKLm95yLoO5ZKJrhgeaQm4xlFGshcK3pYZ9LradQrmY5nmhVdMm+qqpKYkIqpDyltWkpjJJaaKmd6kXjHUXvDPborOaei2666q7LbrvuvgtvvPLOS2+9YBUAADs=" ); exit(); } else { exit(); } } //----------------------------------------- // INIT //----------------------------------------- $content = ' '. preg_replace( "/(\w)/", "\\1 ", $content ) .' '; $allow_fonts = isset( $this->settings['captcha_allow_fonts'] ) ? $this->settings['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->_getBackgrounds(); $fonts = $this->_getFonts(); //----------------------------------------- // Got a background? //----------------------------------------- $_imgs = array(); if ( $this->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 { $_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 ) { if ( $this->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 => 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 ( $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 = -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( -280, -320 ); 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 * * @access private * @param resource Image resource * @param integer Wave factor * @return resource Returned image resource * @since 1.0 */ private 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 * Clears out "dead" entries * * @access private * @param string Optional IP address to clear out on * @return string void */ private function _clearSessions( $ip_address='' ) { //----------------------------------------- // INIT //----------------------------------------- $time = time() - 60 * 3600; $extra = ( $ip_address ) ? " OR captcha_ipaddress='" . $ip_address . "'" : ''; //----------------------------------------- // Remove... //----------------------------------------- $this->DB->delete( 'captcha', 'captcha_date < ' . $time . $extra ); } /** * Loads up the backgrounds. * * @access private * @return array backgrounds */ private function _getBackgrounds() { //----------------------------------------- // 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; } /** * Loads up the fonts. * * @access private * @return array fonts */ private function _getFonts() { //----------------------------------------- // 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; } }