From 13a7cb8a46eb4047e85c2f059c2c53418927c0e5 Mon Sep 17 00:00:00 2001
From: Daniel Winzen <daniel@danwin1210.de>
Date: Sun, 10 Dec 2023 10:14:45 +0100
Subject: [PATCH] Add captcha difficulty hard

---
 var/www/common.php | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/var/www/common.php b/var/www/common.php
index f389b22..a0f5dd6 100644
--- a/var/www/common.php
+++ b/var/www/common.php
@@ -6,7 +6,7 @@ const DBPASS='MY_PASSWORD'; // Database password
 const DBNAME='hosting'; // Database
 const PERSISTENT=true; // Use persistent database conection true/false
 const DBVERSION=21; //database layout version
-const CAPTCHA=1; // Captcha difficulty (0=off, 1=simple, 2=moderate, 3=extreme)
+const CAPTCHA=1; // Captcha difficulty (0=off, 1=simple, 2=moderate, 3=hard, 4=extreme)
 const ADDRESS='dhosting4xxoydyaivckq7tsmtgi4wfs3flpeyitekkmqwu4v4r46syd.onion'; // our own address
 const CANONICAL_URL='https://hosting.danwin1210.me'; // our preferred domain for search engines
 const SERVERS=[ //servers and ports we are running on
@@ -217,6 +217,45 @@ function send_captcha(): void
 			imagesetpixel($im, mt_rand(0, 55), mt_rand(0, 24), $dots);
 		}
 		echo '<img width="55" height="24" src="data:image/gif;base64,';
+	}elseif(CAPTCHA === 3){
+		$im = imagecreatetruecolor(55, 24);
+		$bg = imagecolorallocatealpha($im, 0, 0, 0, 127);
+		$fg = imagecolorallocate($im, 255, 255, 255);
+		$cc = imagecolorallocate($im, 200, 200, 200);
+		$cb = imagecolorallocatealpha($im, 0, 0, 0, 127);
+		imagefill($im, 0, 0, $bg);
+		$line = imagecolorallocate($im, 255, 255, 255);
+		$deg = (mt_rand(0,1)*2-1)*mt_rand(10, 20);
+
+		$background = imagecreatetruecolor(120, 80);
+		imagefill($background, 0, 0, $cb);
+
+		for ($i=0; $i<20; ++$i) {
+			$char=imagecreatetruecolor(12, 16);
+			imagestring($char, 5, 2, 2, $captchachars[mt_rand(0, $length)], $cc);
+			$char = imagerotate($char, (mt_rand(0,1)*2-1)*mt_rand(10, 20), $cb);
+			$char = imagescale($char, 24, 32);
+			imagefilter($char, IMG_FILTER_SMOOTH, 0.6);
+			imagecopy($background, $char, rand(0, 100), rand(0, 60), 0, 0, 24, 32);
+		}
+
+		imagestring($im, 5, 5, 5, $code, $fg);
+		$im = imagescale($im, 110, 48);
+		imagefilter($im, IMG_FILTER_SMOOTH, 0.5);
+		imagefilter($im, IMG_FILTER_GAUSSIAN_BLUR);
+		$im = imagerotate($im, $deg, $bg);
+		$im = imagecrop($im, array('x'=>0, 'y'=>0, 'width'=>120, 'height'=>80));
+		imagecopy($background, $im, 0, 0, 0, 0, 110, 80);
+		imagedestroy($im);
+		$im = $background;
+
+		for($i=0;$i<1000;++$i){
+			$c = mt_rand(100,230);
+			$dots=imagecolorallocate($im, $c, $c, $c);
+			imagesetpixel($im, mt_rand(0, 120), mt_rand(0, 80), $dots);
+		}
+		imagedestroy($char);
+		echo '<img width="120" height="80" src="data:image/png;base64,';
 	}else{
 		$im = imagecreatetruecolor(150, 200);
 		$bg = imagecolorallocate($im, 0, 0, 0);