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<?php
/**
Copyright 2011-2014 Nick Korbel
This file is part of Booked SchedulerBooked SchedulereIt is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later versBooked SchedulerduleIt is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
alBooked SchedulercheduleIt. If not, see <http://www.gnu.org/licenses/>.
*/
interface ICaptchaService
{
/**
* @abstract
* @return string
*/
public function GetImageUrl();
/**
* @abstract
* @param string $captchaValue
* @return bool
*/
public function IsCorrect($captchaValue);
}
class NullCaptchaService implements ICaptchaService
{
/**
* @return string
*/
public function GetImageUrl()
{
return '';
}
/**
* @param string $captchaValue
* @return bool
*/
public function IsCorrect($captchaValue)
{
return true;
}
}
class CaptchaService implements ICaptchaService
{
private function __construct()
{
}
public function GetImageUrl()
{
$url = new Url(Configuration::Instance()->GetScriptUrl() . '/Services/Authentication/show-captcha.php');
$url->AddQueryString('show', 'true');
return $url->__toString();
}
public function IsCorrect($captchaValue)
{
require_once(ROOT_DIR . 'lib/external/securimage/securimage.php');
$img = new securimage();
$isValid = $img->check($captchaValue);
Log::Debug('Checking captcha value. Value entered: %s. IsValid: %s', $captchaValue, (int)$isValid);
return $isValid;
}
/**
* @static
* @return CaptchaService|NullCaptchaService
*/
public static function Create()
{
if (Configuration::Instance()->GetKey(ConfigKeys::REGISTRATION_ENABLE_CAPTCHA, new BooleanConverter()))
{
if (Configuration::Instance()->GetSectionKey(ConfigSection::RECAPTCHA, ConfigKeys::RECAPTCHA_ENABLED,
new BooleanConverter())
)
{
Log::Debug('Using ReCaptchaService');
return new ReCaptchaService();
}
Log::Debug('Using CaptchaService');
return new CaptchaService();
}
return new NullCaptchaService();
}
}
class ReCaptchaService implements ICaptchaService
{
/**
* @return string
*/
public function GetImageUrl()
{
return '';
}
/**
* @param string $captchaValue
* @return bool
*/
public function IsCorrect($captchaValue)
{
$server = ServiceLocator::GetServer();
Log::Debug('Checking ReCaptcha. Value entered=%s', $server->GetForm('recaptcha_response_field'));
require_once(ROOT_DIR . 'lib/external/recaptcha/recaptchalib.php');
$privatekey = Configuration::Instance()->GetSectionKey(ConfigSection::RECAPTCHA, ConfigKeys::RECAPTCHA_PRIVATE_KEY);
$resp = recaptcha_check_answer($privatekey,
$server->GetRemoteAddress(),
$server->GetForm('recaptcha_challenge_field'),
$server->GetForm('recaptcha_response_field'));
Log::Debug('ReCaptcha IsValid: %s', $resp->is_valid);
return $resp->is_valid;
}
}
?>