1 files changed, 104 insertions, 0 deletions
diff --git a/addons/copyable_captcha.php b/addons/copyable_captcha.php
new file mode 100644
index 0000000..8f136d9
--- /dev/null
+++ b/addons/copyable_captcha.php
@@ -0,0 +1,104 @@
+<?php
+
+/**
+ * Copyable Captha plugin
+ * Copyright (C) 2016 artoodetoo
+ * Special thanks to Visman for his help
+ * License: http://www.gnu.org/licenses/gpl.html GPL version 2 or higher
+ */
+
+class addon_copyable_captcha extends flux_addon
+{
+	var $lang;
+	var $styles;
+	var $spans;
+
+	function register($manager)
+	{
+		global $pun_user;
+
+		if (!$pun_user['is_guest']) return;
+
+		$manager->bind('register_after_validation', array($this, 'hook_register_after_validation'));
+		$manager->bind('register_before_header', array($this, 'hook_register_before_header'));
+		$manager->bind('register_before_submit', array($this, 'hook_register_before_submit'));
+	}
+
+	function load_lang()
+	{
+		global $pun_user;
+
+		if (isset($this->lang)) return;
+
+		$user_lang = file_exists(PUN_ROOT.'lang/'.$pun_user['language'].'/copyable_captcha.php')
+			? $pun_user['language']
+			: 'English';
+		require PUN_ROOT.'lang/'.$user_lang.'/copyable_captcha.php';
+
+		$this->lang = $lang_copyable_captcha;
+	}
+
+	function hook_register_after_validation()
+	{
+		global $errors, $cookie_name, $cookie_seed;
+
+		if (isset($_POST['req_word']) && isset($_COOKIE[$cookie_name.'_captcha']) && substr_count($_COOKIE[$cookie_name.'_captcha'], '-') === 1) {
+			list($hash, $time) = explode('-', $_COOKIE[$cookie_name.'_captcha']);
+			$word = $_POST['req_word'];
+			if ((int)$time <= time() - 120 || $hash !== sha1(strtolower($word).$cookie_seed.'secret'.$time)) {
+				$this->load_lang();
+				$errors[] = $this->lang['Captcha error'];
+			}
+		} else {
+			$this->load_lang();
+			$errors[] = $this->lang['Captcha error'];
+		}
+	}
+
+
+	function hook_register_before_header()
+	{
+		global $required_fields, $errors, $cookie_name, $cookie_seed;
+
+		$this->load_lang();
+		$required_fields['req_word'] = $this->lang['Captcha'];
+
+		$time = time();
+		$word = random_pass(mt_rand(4, 6));
+		$hash = sha1(strtolower($word).$cookie_seed.'secret'.$time);
+		forum_setcookie($cookie_name.'_captcha', $hash.'-'.$time, $time + 120);
+
+		$array = str_split($word);
+		$mixin = random_pass(mt_rand(1, 3));
+		$i = -1;
+		$this->styles = '';
+		foreach (str_split($mixin) as $ch) {
+			$i = mt_rand($i+1, count($array));
+			array_splice($array, $i, 0, $ch);
+			$this->styles .= '.masq i:nth-child('.($i + 1).'){display:none;} ';
+		}
+		$this->spans = '<i>'.implode('</i><i>', $array).'</i>';
+	}
+
+
+	function hook_register_before_submit()
+	{
+		global $lang_common;
+
+		$this->load_lang();
+
+?>
+			<div class="inform">
+				<fieldset>
+					<legend><?php echo $this->lang['Captcha legend'] ?></legend>
+					<div class="infldset">
+						<style> .masq i {font-style:normal;} <?php echo $this->styles ?></style>
+						<p><?php echo sprintf($this->lang['Captcha info'], $this->spans) ?></p>
+						<label class="required"><strong><?php echo $this->lang['Captcha'] ?> <span><?php echo $lang_common['Required'] ?></span></strong><br /><input type="text" name="req_word" size="25" maxlength="25" /><br /></label>
+					</div>
+				</fieldset>
+			</div>
+<?php
+
+	}
+}