1 files changed, 225 insertions, 0 deletions
diff --git a/phpBB/phpbb/captcha/plugins/recaptcha.php b/phpBB/phpbb/captcha/plugins/recaptcha.php
new file mode 100644
index 0000000000..152709a9ea
--- /dev/null
+++ b/phpBB/phpbb/captcha/plugins/recaptcha.php
@@ -0,0 +1,225 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\captcha\plugins;
+
+class recaptcha extends captcha_abstract
+{
+	var $recaptcha_server = 'http://www.google.com/recaptcha/api';
+	var $recaptcha_server_secure = 'https://www.google.com/recaptcha/api'; // class constants :(
+
+	var $response;
+
+	/**
+	* Constructor
+	*/
+	public function __construct()
+	{
+		global $request;
+		$this->recaptcha_server = $request->is_secure() ? $this->recaptcha_server_secure : $this->recaptcha_server;
+	}
+
+	function init($type)
+	{
+		global $user, $request;
+
+		$user->add_lang('captcha_recaptcha');
+		parent::init($type);
+		$this->response = $request->variable('g-recaptcha-response', '');
+	}
+
+	public function is_available()
+	{
+		global $config, $user;
+		$user->add_lang('captcha_recaptcha');
+		return (isset($config['recaptcha_pubkey']) && !empty($config['recaptcha_pubkey']));
+	}
+
+	/**
+	*  API function
+	*/
+	function has_config()
+	{
+		return true;
+	}
+
+	static public function get_name()
+	{
+		return 'CAPTCHA_RECAPTCHA';
+	}
+
+	/**
+	* This function is implemented because required by the upper class, but is never used for reCaptcha.
+	*/
+	function get_generator_class()
+	{
+		throw new \Exception('No generator class given.');
+	}
+
+	function acp_page($id, &$module)
+	{
+		global $config, $template, $user, $phpbb_log, $request;
+
+		$captcha_vars = array(
+			'recaptcha_pubkey'				=> 'RECAPTCHA_PUBKEY',
+			'recaptcha_privkey'				=> 'RECAPTCHA_PRIVKEY',
+		);
+
+		$module->tpl_name = 'captcha_recaptcha_acp';
+		$module->page_title = 'ACP_VC_SETTINGS';
+		$form_key = 'acp_captcha';
+		add_form_key($form_key);
+
+		$submit = $request->variable('submit', '');
+
+		if ($submit && check_form_key($form_key))
+		{
+			$captcha_vars = array_keys($captcha_vars);
+			foreach ($captcha_vars as $captcha_var)
+			{
+				$value = $request->variable($captcha_var, '');
+				if ($value)
+				{
+					$config->set($captcha_var, $value);
+				}
+			}
+
+			$phpbb_log->add('admin', $user->data['user_id'], $user->ip, 'LOG_CONFIG_VISUAL');
+			trigger_error($user->lang['CONFIG_UPDATED'] . adm_back_link($module->u_action));
+		}
+		else if ($submit)
+		{
+			trigger_error($user->lang['FORM_INVALID'] . adm_back_link($module->u_action));
+		}
+		else
+		{
+			foreach ($captcha_vars as $captcha_var => $template_var)
+			{
+				$var = (isset($_REQUEST[$captcha_var])) ? $request->variable($captcha_var, '') : ((isset($config[$captcha_var])) ? $config[$captcha_var] : '');
+				$template->assign_var($template_var, $var);
+			}
+
+			$template->assign_vars(array(
+				'CAPTCHA_PREVIEW'	=> $this->get_demo_template($id),
+				'CAPTCHA_NAME'		=> $this->get_service_name(),
+				'U_ACTION'			=> $module->u_action,
+			));
+
+		}
+	}
+
+	// not needed
+	function execute_demo()
+	{
+	}
+
+	// not needed
+	function execute()
+	{
+	}
+
+	function get_template()
+	{
+		global $config, $user, $template, $phpbb_root_path, $phpEx;
+
+		if ($this->is_solved())
+		{
+			return false;
+		}
+		else
+		{
+			$contact_link = phpbb_get_board_contact_link($config, $phpbb_root_path, $phpEx);
+			$explain = $user->lang(($this->type != CONFIRM_POST) ? 'CONFIRM_EXPLAIN' : 'POST_CONFIRM_EXPLAIN', '<a href="' . $contact_link . '">', '</a>');
+
+			$template->assign_vars(array(
+				'RECAPTCHA_SERVER'			=> $this->recaptcha_server,
+				'RECAPTCHA_PUBKEY'			=> isset($config['recaptcha_pubkey']) ? $config['recaptcha_pubkey'] : '',
+				'S_RECAPTCHA_AVAILABLE'		=> self::is_available(),
+				'S_CONFIRM_CODE'			=> true,
+				'S_TYPE'					=> $this->type,
+				'L_CONFIRM_EXPLAIN'			=> $explain,
+			));
+
+			return 'captcha_recaptcha.html';
+		}
+	}
+
+	function get_demo_template($id)
+	{
+		return $this->get_template();
+	}
+
+	function get_hidden_fields()
+	{
+		$hidden_fields = array();
+
+		// this is required for posting.php - otherwise we would forget about the captcha being already solved
+		if ($this->solved)
+		{
+			$hidden_fields['confirm_code'] = $this->code;
+		}
+		$hidden_fields['confirm_id'] = $this->confirm_id;
+		return $hidden_fields;
+	}
+
+	function uninstall()
+	{
+		$this->garbage_collect(0);
+	}
+
+	function install()
+	{
+		return;
+	}
+
+	function validate()
+	{
+		if (!parent::validate())
+		{
+			return false;
+		}
+		else
+		{
+			return $this->recaptcha_check_answer();
+		}
+	}
+
+	/**
+	* Calls an HTTP POST function to verify if the user's guess was correct
+	*
+	* @return bool|string Returns false on success or error string on failure.
+	*/
+	function recaptcha_check_answer()
+	{
+		global $config, $user;
+
+		//discard spam submissions
+		if ($this->response == null || strlen($this->response) == 0)
+		{
+			return $user->lang['RECAPTCHA_INCORRECT'];
+		}
+
+		$recaptcha = new \ReCaptcha\ReCaptcha($config['recaptcha_privkey']);
+		$result = $recaptcha->verify($this->response, $user->ip);
+
+		if ($result->isSuccess())
+		{
+			$this->solved = true;
+			return false;
+		}
+		else
+		{
+			return $user->lang['RECAPTCHA_INCORRECT'];
+		}
+	}
+}