<?php
declare(strict_types=1);
namespace ParagonIE\Paseto\Rules;
use ParagonIE\Paseto\{
JsonToken,
ValidationRuleInterface
};
use ParagonIE\Paseto\Exception\PasetoException;
/**
* Class Subject
* @package ParagonIE\Paseto\Rules
*/
class Subject implements ValidationRuleInterface
{
/** @var string $failure */
protected $failure = 'OK';
/** @var string $subject */
protected $subject;
/**
* Subject constructor.
* @param string $subject
*/
public function __construct(string $subject)
{
$this->subject = $subject;
}
/**
* @return string
*/
public function getFailureMessage(): string
{
return $this->failure;
}
/**
* @param JsonToken $token
* @return bool
*/
public function isValid(JsonToken $token): bool
{
try {
$subject = $token->getSubject();
if (!\hash_equals($this->subject, $subject)) {
$this->failure = 'This token was not related to ' .
$this->subject . ' (expected); its subject is ' .
$subject . ' instead.';
return false;
}
} catch (PasetoException $ex) {
$this->failure = $ex->getMessage();
return false;
}
return true;
}
}
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