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<?php |
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namespace Jasny\Auth; |
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use Hashids\Hashids; |
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/** |
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* Generate and verify confirmation tokens. |
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* |
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* Uses the hashids library. |
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* @link http://hashids.org/php/ |
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* |
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* <code> |
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* class Auth extends Jasny\Auth |
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* { |
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* use Jasny\Auth\Confirmation; |
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* |
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* public function getConfirmationSecret() |
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* { |
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* return "f)lk3sd^92qlj$%f8321*(&lk"; |
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* } |
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* |
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* ... |
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* } |
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* </code> |
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*/ |
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trait Confirmation |
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{ |
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/** |
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* Fetch a user by ID |
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* |
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* @param int|string $id |
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* @return User|null |
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*/ |
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abstract public function fetchUserById($id); |
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/** |
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* Get secret for the confirmation hash |
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* |
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* @return string |
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*/ |
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abstract protected function getConfirmationSecret(); |
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/** |
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* Create a heashids interface |
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* |
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* @param string $secret |
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* @return Hashids |
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*/ |
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protected function createHashids($subject) |
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{ |
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if (!class_exists(Hashids::class)) { |
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// @codeCoverageIgnoreStart |
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throw new \Exception("Unable to generate a confirmation hash: Hashids library is not installed"); |
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// @codeCoverageIgnoreEnd |
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} |
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$salt = hash('sha256', $this->getConfirmationSecret() . $subject); |
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return new Hashids($salt); |
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} |
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/** |
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* Generate a confirm hash based on a user id |
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* |
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* @param string $id |
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* @return int |
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*/ |
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protected function generateConfirmHash($id) |
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{ |
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$confirmHash = md5($id . $this->getConfirmationSecret()); |
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return hexdec(substr($confirmHash, 0, 8)); |
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} |
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/** |
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* Generate a confirmation token |
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* |
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* @param User $user |
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* @param string $subject What needs to be confirmed? |
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* @return string |
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*/ |
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public function getConfirmationToken(User $user, $subject) |
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{ |
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$hashids = $this->createHashids($subject); |
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$id = $user->getId(); |
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$confirm = $this->generateConfirmHash($id); |
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$parts = array_map('hexdec', str_split($id, 8)); // Will work if id is hexidecimal or decimal |
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$parts[] = $confirm; |
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return $hashids->encode($parts); |
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} |
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/** |
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* Get user by confirmation hash |
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* |
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* @param string $token Confirmation token |
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* @param string $subject What needs to be confirmed? |
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* @return User|null |
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*/ |
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public function fetchUserForConfirmation($token, $subject) |
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{ |
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$hashids = $this->createHashids($subject); |
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$parts = $hashids->decode($token); |
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if (empty($parts)) { |
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return null; |
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} |
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$confirm = array_pop($parts); |
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$id = join(array_map('dechex', $parts)); |
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if ($confirm !== $this->generateConfirmHash($id)) { |
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return null; |
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} |
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return $this->fetchUserById($id); |
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} |
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} |
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jasny /
auth
This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.