From 669beed5392d22421d03b2a2d1bf12f5f0db9012 Mon Sep 17 00:00:00 2001
From: xue <>
Date: Tue, 28 Aug 2007 22:05:18 +0000
Subject: added TCaptcha, TCaptchaValidator.

---
 framework/Web/UI/WebControls/assets/captcha.php | 35 +++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 framework/Web/UI/WebControls/assets/captcha.php

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

diff --git a/framework/Web/UI/WebControls/assets/captcha.php b/framework/Web/UI/WebControls/assets/captcha.php
new file mode 100644
index 00000000..aa3fdcc0
--- /dev/null
+++ b/framework/Web/UI/WebControls/assets/captcha.php
@@ -0,0 +1,35 @@
+<?php
+
+require_once(dirname(__FILE__).'/captcha_key.php');
+
+if(isset($_GET['pk']))
+	echo $_GET['pk'].$privateKey;
+else
+	echo $privateKey;
+
+function generateToken($publicKey,$privateKey,$tokenLength,$caseSensitive)
+{
+	$token=substr(hash2string(md5($publicKey.$privateKey)).hash2string(md5($privateKey.$publicKey)),0,$tokenLength);
+	return $caseSensitive?$token:strtoupper($token);
+}
+
+function hash2string($hex,$alphabet='')
+{
+	if(strlen($alphabet)<2)
+		$alphabet='0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+	$hexLength=strlen($hex);
+	$base=strlen($alphabet);
+	$result='';
+	for($i=0;$i<$hexLength;$i+=6)
+	{
+		$number=hexdec(substr($hex,$i,6));
+		while($number)
+		{
+			$result.=$alphabet[$number%$base];
+			$number=floor($number/$base);
+		}
+	}
+	return $result;
+}
+
+?>
\ No newline at end of file
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