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<?php
namespace CloudflareBypass\Model\UAM;
use SimpleJavaScriptCompilation\DeclarationInterpreterImpl;
use SimpleJavaScriptCompilation\ExpressionInterpreterImpl;
use SimpleJavaScriptCompilation\Model\Context;
use SimpleJavaScriptCompilation\Model\DataType;
use SimpleJavaScriptCompilation\Model\DataType\CustomString;
/**
* Class UAMPageFormParams
* - UAM page form parameters.
* - Part of UAMPageAttributes model.
*
* @package CloudflareBypass\Model\UAM
* @author Kyran Rana
*/
class UAMPageFormParams
{
/**
* Gets all input parameter values from UAM page.
*
* @param UAMPageAttributes $pageAttributes UAM page attributes
* @return UAMPageFormParams UAM page form params.
* @throws \ErrorException if JS evaluation fails
*/
public static function getParamsFromPage(UAMPageAttributes $pageAttributes): UAMPageFormParams
{
$page = $pageAttributes->getPage();
preg_match('/name="r" value="([^"]*)"/', $page, $sMatches);
preg_match('/name="jschl_vc" value="([^"]+)"/', $page, $jschlVcMatches);
preg_match('/name="pass" value="([^"]+)"/', $page, $passMatches);
preg_match('/action="([^"]+)"/', $page, $urlMatches);
return new UAMPageFormParams(
$sMatches[1],
$jschlVcMatches[1],
$passMatches[1],
self::getJschlAnswerFromPage($pageAttributes),
htmlspecialchars_decode($urlMatches[1])
);
}
/**
* Gets answer to JavaScript challenge.
*
* @param UAMPageAttributes $pageAttributes UAM page attributes.
* @return string Answer to JavaScript challenge
* @throws \ErrorException if JS evaluation fails
*/
public static function getJschlAnswerFromPage(UAMPageAttributes $pageAttributes): string
{
$codeSnippets = UAMPageChallengeCode::getSnippetsFromPage($pageAttributes->getPage());
$ctx = new Context();
$ctx->setCtxFunc('e', 'SimpleJavaScriptCompilation\Model\FunctionMap\GlobalFunctionMap::atob');
$ctx->setCtxFunc('g', 'SimpleJavaScriptCompilation\Model\FunctionMap\GlobalFunctionMap::stringFromCharCode');
$ctx->setCtxVar('t', new CustomString(new DataType(['value' => '"' . $pageAttributes->getHost() . '"'])));
if ($codeSnippets->getSecondaryChallengeCode() !== "") {
$ctx->setCtxVar('k', ExpressionInterpreterImpl::instance()->interpretExpression($codeSnippets->getSecondaryChallengeCode(), new Context()));
}
$ctx = DeclarationInterpreterImpl::instance()->interpretDeclarations($codeSnippets->getChallengeCode(), $ctx);
return substr($ctx->getCtxVar("answer")->getDataType()->getValue(), 1, -1);
}
// -------------------------------------------------------------------------------------------------------
/**
* R param
*
* @var string $r
*/
private $r;
/**
* JSCHL VC param
*
* @var string $jschlVc
*/
private $jschlVc;
/**
* PASS param
*
* @var string $pass
*/
private $pass;
/**
* JSCHL answer param
*
* @var string $jschlAnswer
*/
private $jschlAnswer;
/**
* FORM ACTION param
*
* @var string $action
*/
private $action;
public function __construct(string $r, string $jschlVc, string $pass, string $jschlAnswer, string $action)
{
$this->r = $r;
$this->jschlVc = $jschlVc;
$this->pass = $pass;
$this->jschlAnswer = $jschlAnswer;
$this->action = $action;
}
/**
* Gets R param
*
* @return string R param
*/
public function getR(): string
{
return $this->r;
}
/**
* Gets form action param
*
* @return string form action param
*/
public function getAction(): string
{
return $this->action;
}
/**
* Gets JSCHL VC param.
*
* @return string JSCHL VC param
*/
public function getJschlVc(): string
{
return $this->jschlVc;
}
/**
* Gets PASS param
*
* @return string
*/
public function getPass(): string
{
return $this->pass;
}
/**
* Gets JSCHL ANSWER param.
*
* @return string
*/
public function getJschlAnswer(): string
{
return $this->jschlAnswer;
}
/**
* Gets query string.
*
* @return string Query string.
*/
public function getQueryString(): string
{
return http_build_query([
'r' => $this->getR(),
'jschl_vc' => $this->getJschlVc(),
'pass' => $this->getPass(),
'jschl_answer' => $this->getJschlAnswer()
]);
}
}