From d1875fd32e0aa7a093544b5decd0b43499424d4f Mon Sep 17 00:00:00 2001
From: xue <>
Date: Thu, 30 Aug 2007 15:40:24 +0000
Subject: further enhanced TCaptcha.

---
 framework/Web/UI/WebControls/TCaptchaValidator.php | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'framework/Web/UI/WebControls/TCaptchaValidator.php')

diff --git a/framework/Web/UI/WebControls/TCaptchaValidator.php b/framework/Web/UI/WebControls/TCaptchaValidator.php
index 4385bbfe..6d2c8f4c 100644
--- a/framework/Web/UI/WebControls/TCaptchaValidator.php
+++ b/framework/Web/UI/WebControls/TCaptchaValidator.php
@@ -102,16 +102,23 @@ class TCaptchaValidator extends TBaseValidator
 		$control=$this->findCaptchaControl();
 		if($control->getCaseSensitive())
 		{
-			$options['TokenHash']=crc32($control->getToken());
+			$options['TokenHash']=$this->generateTokenHash($control->getToken());
 			$options['CaseSensitive']=true;
 		}
 		else
 		{
-			$options['TokenHash']=crc32(strtoupper($control->getToken()));
+			$options['TokenHash']=$this->generateTokenHash(strtoupper($control->getToken()));
 			$options['CaseSensitive']=false;
 		}
 		return $options;
 	}
+
+	private function generateTokenHash($token)
+	{
+		for($h=0,$i=strlen($token)-1;$i>=0;--$i)
+			$h+=ord($token[$i]);
+		return $h;
+	}
 }
 
 ?>
\ No newline at end of file
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