diff options
Diffstat (limited to 'framework/Web/UI/WebControls/assets/captcha.php')
| -rw-r--r-- | framework/Web/UI/WebControls/assets/captcha.php | 60 |
1 files changed, 54 insertions, 6 deletions
diff --git a/framework/Web/UI/WebControls/assets/captcha.php b/framework/Web/UI/WebControls/assets/captcha.php index aa3fdcc0..a722772b 100644 --- a/framework/Web/UI/WebControls/assets/captcha.php +++ b/framework/Web/UI/WebControls/assets/captcha.php @@ -1,11 +1,17 @@ <?php
-require_once(dirname(__FILE__).'/captcha_key.php');
-
-if(isset($_GET['pk']))
- echo $_GET['pk'].$privateKey;
+if(isset($_GET['pk']) && strlen($_GET['pk'])>=6 && isset($_GET['length']) && (int)$_GET['length']>=4 && isset($_GET['case']))
+{
+ require_once(dirname(__FILE__).'/captcha_key.php');
+ $publicKey=$_GET['pk'];
+ $tokenLength=(int)$_GET['length'];
+ $caseSensitive=!empty($_GET['case']);
+ $token=generateToken($publicKey,$privateKey,$tokenLength,$caseSensitive);
+}
else
- echo $privateKey;
+ $token='error';
+
+displayToken($token);
function generateToken($publicKey,$privateKey,$tokenLength,$caseSensitive)
{
@@ -16,7 +22,7 @@ function generateToken($publicKey,$privateKey,$tokenLength,$caseSensitive) function hash2string($hex,$alphabet='')
{
if(strlen($alphabet)<2)
- $alphabet='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+ $alphabet='234578adefhijmnrtABDEFGHJLMNQRT';
$hexLength=strlen($hex);
$base=strlen($alphabet);
$result='';
@@ -32,4 +38,46 @@ function hash2string($hex,$alphabet='') return $result;
}
+function displayToken($token)
+{
+ $length=strlen($token);
+ $width=45*$length;
+ $height=70;
+ $image=imagecreatetruecolor($width,$height);
+ $font=dirname(__FILE__).DIRECTORY_SEPARATOR.'verase.ttf';
+ $vred=rand(0,100);
+ $vgreen=rand(0,100);
+ $vblue=rand(0,100);
+ for($x=0;$x<$width;++$x)
+ {
+ for($y=0;$y<$height;++$y)
+ {
+ $vred+=rand(-2,2);
+ $vgreen+=rand(-2,2);
+ $vblue+=rand(-2,2);
+ if($vred<0) $vred=0; if($vred>150) $vred=75;
+ if($vgreen<0) $vgreen=0; if($vgreen>150) $vgreen=75;
+ if($vblue<0) $vblue=0; if($vblue>150) $vblue=75;
+ $col = imagecolorallocate($image, $vred, $vgreen, $vblue);
+ imagesetpixel($image, $x, $y, $col);
+ imagecolordeallocate($image, $col);
+ }
+ }
+
+ imagefilter($image,IMG_FILTER_GAUSSIAN_BLUR);
+ for($i=0;$i<$length;$i++)
+ {
+ $vred = rand(150, 240);
+ $vgreen = rand(150, 240);
+ $vblue = rand(150, 240);
+ $col = imagecolorallocate($image, $vred, $vgreen, $vblue);
+ $char = $token[$i];
+ imagettftext($image, rand(40, 50), rand(-10, 20), 13 + (40 * $i), rand(50, imagesy($image) - 10), $col, $font, $char);
+ imagecolordeallocate($image, $col);
+ }
+ imagefilter($image,IMG_FILTER_GAUSSIAN_BLUR);
+ imagepng($image);
+ imagedestroy($image);
+}
+
?>
\ No newline at end of file |